diff options
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/power/Makefile | 1 | ||||
| -rw-r--r-- | drivers/power/avs/Kconfig | 37 | ||||
| -rw-r--r-- | drivers/power/avs/Makefile | 4 | ||||
| -rw-r--r-- | drivers/power/avs/qcom-cpr.c | 1788 | ||||
| -rw-r--r-- | drivers/power/avs/rockchip-io-domain.c | 630 | ||||
| -rw-r--r-- | drivers/power/avs/smartreflex.c | 1045 |
7 files changed, 0 insertions, 3506 deletions
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig index ff0350ca3b74..696bf77a7042 100644 --- a/drivers/power/Kconfig +++ b/drivers/power/Kconfig @@ -1,4 +1,3 @@ # SPDX-License-Identifier: GPL-2.0-only -source "drivers/power/avs/Kconfig" source "drivers/power/reset/Kconfig" source "drivers/power/supply/Kconfig" diff --git a/drivers/power/Makefile b/drivers/power/Makefile index b7c2e372186b..effbf0377f32 100644 --- a/drivers/power/Makefile +++ b/drivers/power/Makefile @@ -1,4 +1,3 @@ # SPDX-License-Identifier: GPL-2.0-only -obj-$(CONFIG_POWER_AVS) += avs/ obj-$(CONFIG_POWER_RESET) += reset/ obj-$(CONFIG_POWER_SUPPLY) += supply/ diff --git a/drivers/power/avs/Kconfig b/drivers/power/avs/Kconfig deleted file mode 100644 index cdb4237bfd02..000000000000 --- a/drivers/power/avs/Kconfig +++ /dev/null @@ -1,37 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0-only -menuconfig POWER_AVS - bool "Adaptive Voltage Scaling class support" - help - AVS is a power management technique which finely controls the - operating voltage of a device in order to optimize (i.e. reduce) - its power consumption. - At a given operating point the voltage is adapted depending on - static factors (chip manufacturing process) and dynamic factors - (temperature depending performance). - AVS is also called SmartReflex on OMAP devices. - - Say Y here to enable Adaptive Voltage Scaling class support. - -config QCOM_CPR - tristate "QCOM Core Power Reduction (CPR) support" - depends on POWER_AVS && HAS_IOMEM - select PM_OPP - select REGMAP - help - Say Y here to enable support for the CPR hardware found on Qualcomm - SoCs like QCS404. - - This driver populates CPU OPPs tables and makes adjustments to the - tables based on feedback from the CPR hardware. If you want to do - CPUfrequency scaling say Y here. - - To compile this driver as a module, choose M here: the module will - be called qcom-cpr - -config ROCKCHIP_IODOMAIN - tristate "Rockchip IO domain support" - depends on POWER_AVS && ARCH_ROCKCHIP && OF - help - Say y here to enable support io domains on Rockchip SoCs. It is - necessary for the io domain setting of the SoC to match the - voltage supplied by the regulators. diff --git a/drivers/power/avs/Makefile b/drivers/power/avs/Makefile deleted file mode 100644 index 9007d05853e2..000000000000 --- a/drivers/power/avs/Makefile +++ /dev/null @@ -1,4 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0-only -obj-$(CONFIG_POWER_AVS_OMAP) += smartreflex.o -obj-$(CONFIG_QCOM_CPR) += qcom-cpr.o -obj-$(CONFIG_ROCKCHIP_IODOMAIN) += rockchip-io-domain.o diff --git a/drivers/power/avs/qcom-cpr.c b/drivers/power/avs/qcom-cpr.c deleted file mode 100644 index b24cc77d1889..000000000000 --- a/drivers/power/avs/qcom-cpr.c +++ /dev/null @@ -1,1788 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved. - * Copyright (c) 2019, Linaro Limited - */ - -#include <linux/module.h> -#include <linux/err.h> -#include <linux/debugfs.h> -#include <linux/string.h> -#include <linux/kernel.h> -#include <linux/list.h> -#include <linux/init.h> -#include <linux/io.h> -#include <linux/bitops.h> -#include <linux/slab.h> -#include <linux/of.h> -#include <linux/of_device.h> -#include <linux/platform_device.h> -#include <linux/pm_domain.h> -#include <linux/pm_opp.h> -#include <linux/interrupt.h> -#include <linux/regmap.h> -#include <linux/mfd/syscon.h> -#include <linux/regulator/consumer.h> -#include <linux/clk.h> -#include <linux/nvmem-consumer.h> - -/* Register Offsets for RB-CPR and Bit Definitions */ - -/* RBCPR Version Register */ -#define REG_RBCPR_VERSION 0 -#define RBCPR_VER_2 0x02 -#define FLAGS_IGNORE_1ST_IRQ_STATUS BIT(0) - -/* RBCPR Gate Count and Target Registers */ -#define REG_RBCPR_GCNT_TARGET(n) (0x60 + 4 * (n)) - -#define RBCPR_GCNT_TARGET_TARGET_SHIFT 0 -#define RBCPR_GCNT_TARGET_TARGET_MASK GENMASK(11, 0) -#define RBCPR_GCNT_TARGET_GCNT_SHIFT 12 -#define RBCPR_GCNT_TARGET_GCNT_MASK GENMASK(9, 0) - -/* RBCPR Timer Control */ -#define REG_RBCPR_TIMER_INTERVAL 0x44 -#define REG_RBIF_TIMER_ADJUST 0x4c - -#define RBIF_TIMER_ADJ_CONS_UP_MASK GENMASK(3, 0) -#define RBIF_TIMER_ADJ_CONS_UP_SHIFT 0 -#define RBIF_TIMER_ADJ_CONS_DOWN_MASK GENMASK(3, 0) -#define RBIF_TIMER_ADJ_CONS_DOWN_SHIFT 4 -#define RBIF_TIMER_ADJ_CLAMP_INT_MASK GENMASK(7, 0) -#define RBIF_TIMER_ADJ_CLAMP_INT_SHIFT 8 - -/* RBCPR Config Register */ -#define REG_RBIF_LIMIT 0x48 -#define RBIF_LIMIT_CEILING_MASK GENMASK(5, 0) -#define RBIF_LIMIT_CEILING_SHIFT 6 -#define RBIF_LIMIT_FLOOR_BITS 6 -#define RBIF_LIMIT_FLOOR_MASK GENMASK(5, 0) - -#define RBIF_LIMIT_CEILING_DEFAULT RBIF_LIMIT_CEILING_MASK -#define RBIF_LIMIT_FLOOR_DEFAULT 0 - -#define REG_RBIF_SW_VLEVEL 0x94 -#define RBIF_SW_VLEVEL_DEFAULT 0x20 - -#define REG_RBCPR_STEP_QUOT 0x80 -#define RBCPR_STEP_QUOT_STEPQUOT_MASK GENMASK(7, 0) -#define RBCPR_STEP_QUOT_IDLE_CLK_MASK GENMASK(3, 0) -#define RBCPR_STEP_QUOT_IDLE_CLK_SHIFT 8 - -/* RBCPR Control Register */ -#define REG_RBCPR_CTL 0x90 - -#define RBCPR_CTL_LOOP_EN BIT(0) -#define RBCPR_CTL_TIMER_EN BIT(3) -#define RBCPR_CTL_SW_AUTO_CONT_ACK_EN BIT(5) -#define RBCPR_CTL_SW_AUTO_CONT_NACK_DN_EN BIT(6) -#define RBCPR_CTL_COUNT_MODE BIT(10) -#define RBCPR_CTL_UP_THRESHOLD_MASK GENMASK(3, 0) -#define RBCPR_CTL_UP_THRESHOLD_SHIFT 24 -#define RBCPR_CTL_DN_THRESHOLD_MASK GENMASK(3, 0) -#define RBCPR_CTL_DN_THRESHOLD_SHIFT 28 - -/* RBCPR Ack/Nack Response */ -#define REG_RBIF_CONT_ACK_CMD 0x98 -#define REG_RBIF_CONT_NACK_CMD 0x9c - -/* RBCPR Result status Register */ -#define REG_RBCPR_RESULT_0 0xa0 - -#define RBCPR_RESULT0_BUSY_SHIFT 19 -#define RBCPR_RESULT0_BUSY_MASK BIT(RBCPR_RESULT0_BUSY_SHIFT) -#define RBCPR_RESULT0_ERROR_LT0_SHIFT 18 -#define RBCPR_RESULT0_ERROR_SHIFT 6 -#define RBCPR_RESULT0_ERROR_MASK GENMASK(11, 0) -#define RBCPR_RESULT0_ERROR_STEPS_SHIFT 2 -#define RBCPR_RESULT0_ERROR_STEPS_MASK GENMASK(3, 0) -#define RBCPR_RESULT0_STEP_UP_SHIFT 1 - -/* RBCPR Interrupt Control Register */ -#define REG_RBIF_IRQ_EN(n) (0x100 + 4 * (n)) -#define REG_RBIF_IRQ_CLEAR 0x110 -#define REG_RBIF_IRQ_STATUS 0x114 - -#define CPR_INT_DONE BIT(0) -#define CPR_INT_MIN BIT(1) -#define CPR_INT_DOWN BIT(2) -#define CPR_INT_MID BIT(3) -#define CPR_INT_UP BIT(4) -#define CPR_INT_MAX BIT(5) -#define CPR_INT_CLAMP BIT(6) -#define CPR_INT_ALL (CPR_INT_DONE | CPR_INT_MIN | CPR_INT_DOWN | \ - CPR_INT_MID | CPR_INT_UP | CPR_INT_MAX | CPR_INT_CLAMP) -#define CPR_INT_DEFAULT (CPR_INT_UP | CPR_INT_DOWN) - -#define CPR_NUM_RING_OSC 8 - -/* CPR eFuse parameters */ -#define CPR_FUSE_TARGET_QUOT_BITS_MASK GENMASK(11, 0) - -#define CPR_FUSE_MIN_QUOT_DIFF 50 - -#define FUSE_REVISION_UNKNOWN (-1) - -enum voltage_change_dir { - NO_CHANGE, - DOWN, - UP, -}; - -struct cpr_fuse { - char *ring_osc; - char *init_voltage; - char *quotient; - char *quotient_offset; -}; - -struct fuse_corner_data { - int ref_uV; - int max_uV; - int min_uV; - int max_volt_scale; - int max_quot_scale; - /* fuse quot */ - int quot_offset; - int quot_scale; - int quot_adjust; - /* fuse quot_offset */ - int quot_offset_scale; - int quot_offset_adjust; -}; - -struct cpr_fuses { - int init_voltage_step; - int init_voltage_width; - struct fuse_corner_data *fuse_corner_data; -}; - -struct corner_data { - unsigned int fuse_corner; - unsigned long freq; -}; - -struct cpr_desc { - unsigned int num_fuse_corners; - int min_diff_quot; - int *step_quot; - - unsigned int timer_delay_us; - unsigned int timer_cons_up; - unsigned int timer_cons_down; - unsigned int up_threshold; - unsigned int down_threshold; - unsigned int idle_clocks; - unsigned int gcnt_us; - unsigned int vdd_apc_step_up_limit; - unsigned int vdd_apc_step_down_limit; - unsigned int clamp_timer_interval; - - struct cpr_fuses cpr_fuses; - bool reduce_to_fuse_uV; - bool reduce_to_corner_uV; -}; - -struct acc_desc { - unsigned int enable_reg; - u32 enable_mask; - - struct reg_sequence *config; - struct reg_sequence *settings; - int num_regs_per_fuse; -}; - -struct cpr_acc_desc { - const struct cpr_desc *cpr_desc; - const struct acc_desc *acc_desc; -}; - -struct fuse_corner { - int min_uV; - int max_uV; - int uV; - int quot; - int step_quot; - const struct reg_sequence *accs; - int num_accs; - unsigned long max_freq; - u8 ring_osc_idx; -}; - -struct corner { - int min_uV; - int max_uV; - int uV; - int last_uV; - int quot_adjust; - u32 save_ctl; - u32 save_irq; - unsigned long freq; - struct fuse_corner *fuse_corner; -}; - -struct cpr_drv { - unsigned int num_corners; - unsigned int ref_clk_khz; - - struct generic_pm_domain pd; - struct device *dev; - struct device *attached_cpu_dev; - struct mutex lock; - void __iomem *base; - struct corner *corner; - struct regulator *vdd_apc; - struct clk *cpu_clk; - struct regmap *tcsr; - bool loop_disabled; - u32 gcnt; - unsigned long flags; - - struct fuse_corner *fuse_corners; - struct corner *corners; - - const struct cpr_desc *desc; - const struct acc_desc *acc_desc; - const struct cpr_fuse *cpr_fuses; - - struct dentry *debugfs; -}; - -static bool cpr_is_allowed(struct cpr_drv *drv) -{ - return !drv->loop_disabled; -} - -static void cpr_write(struct cpr_drv *drv, u32 offset, u32 value) -{ - writel_relaxed(value, drv->base + offset); -} - -static u32 cpr_read(struct cpr_drv *drv, u32 offset) -{ - return readl_relaxed(drv->base + offset); -} - -static void -cpr_masked_write(struct cpr_drv *drv, u32 offset, u32 mask, u32 value) -{ - u32 val; - - val = readl_relaxed(drv->base + offset); - val &= ~mask; - val |= value & mask; - writel_relaxed(val, drv->base + offset); -} - -static void cpr_irq_clr(struct cpr_drv *drv) -{ - cpr_write(drv, REG_RBIF_IRQ_CLEAR, CPR_INT_ALL); -} - -static void cpr_irq_clr_nack(struct cpr_drv *drv) -{ - cpr_irq_clr(drv); - cpr_write(drv, REG_RBIF_CONT_NACK_CMD, 1); -} - -static void cpr_irq_clr_ack(struct cpr_drv *drv) -{ - cpr_irq_clr(drv); - cpr_write(drv, REG_RBIF_CONT_ACK_CMD, 1); -} - -static void cpr_irq_set(struct cpr_drv *drv, u32 int_bits) -{ - cpr_write(drv, REG_RBIF_IRQ_EN(0), int_bits); -} - -static void cpr_ctl_modify(struct cpr_drv *drv, u32 mask, u32 value) -{ - cpr_masked_write(drv, REG_RBCPR_CTL, mask, value); -} - -static void cpr_ctl_enable(struct cpr_drv *drv, struct corner *corner) -{ - u32 val, mask; - const struct cpr_desc *desc = drv->desc; - - /* Program Consecutive Up & Down */ - val = desc->timer_cons_down << RBIF_TIMER_ADJ_CONS_DOWN_SHIFT; - val |= desc->timer_cons_up << RBIF_TIMER_ADJ_CONS_UP_SHIFT; - mask = RBIF_TIMER_ADJ_CONS_UP_MASK | RBIF_TIMER_ADJ_CONS_DOWN_MASK; - cpr_masked_write(drv, REG_RBIF_TIMER_ADJUST, mask, val); - cpr_masked_write(drv, REG_RBCPR_CTL, - RBCPR_CTL_SW_AUTO_CONT_NACK_DN_EN | - RBCPR_CTL_SW_AUTO_CONT_ACK_EN, - corner->save_ctl); - cpr_irq_set(drv, corner->save_irq); - - if (cpr_is_allowed(drv) && corner->max_uV > corner->min_uV) - val = RBCPR_CTL_LOOP_EN; - else - val = 0; - cpr_ctl_modify(drv, RBCPR_CTL_LOOP_EN, val); -} - -static void cpr_ctl_disable(struct cpr_drv *drv) -{ - cpr_irq_set(drv, 0); - cpr_ctl_modify(drv, RBCPR_CTL_SW_AUTO_CONT_NACK_DN_EN | - RBCPR_CTL_SW_AUTO_CONT_ACK_EN, 0); - cpr_masked_write(drv, REG_RBIF_TIMER_ADJUST, - RBIF_TIMER_ADJ_CONS_UP_MASK | - RBIF_TIMER_ADJ_CONS_DOWN_MASK, 0); - cpr_irq_clr(drv); - cpr_write(drv, REG_RBIF_CONT_ACK_CMD, 1); - cpr_write(drv, REG_RBIF_CONT_NACK_CMD, 1); - cpr_ctl_modify(drv, RBCPR_CTL_LOOP_EN, 0); -} - -static bool cpr_ctl_is_enabled(struct cpr_drv *drv) -{ - u32 reg_val; - - reg_val = cpr_read(drv, REG_RBCPR_CTL); - return reg_val & RBCPR_CTL_LOOP_EN; -} - -static bool cpr_ctl_is_busy(struct cpr_drv *drv) -{ - u32 reg_val; - - reg_val = cpr_read(drv, REG_RBCPR_RESULT_0); - return reg_val & RBCPR_RESULT0_BUSY_MASK; -} - -static void cpr_corner_save(struct cpr_drv *drv, struct corner *corner) -{ - corner->save_ctl = cpr_read(drv, REG_RBCPR_CTL); - corner->save_irq = cpr_read(drv, REG_RBIF_IRQ_EN(0)); -} - -static void cpr_corner_restore(struct cpr_drv *drv, struct corner *corner) -{ - u32 gcnt, ctl, irq, ro_sel, step_quot; - struct fuse_corner *fuse = corner->fuse_corner; - const struct cpr_desc *desc = drv->desc; - int i; - - ro_sel = fuse->ring_osc_idx; - gcnt = drv->gcnt; - gcnt |= fuse->quot - corner->quot_adjust; - - /* Program the step quotient and idle clocks */ - step_quot = desc->idle_clocks << RBCPR_STEP_QUOT_IDLE_CLK_SHIFT; - step_quot |= fuse->step_quot & RBCPR_STEP_QUOT_STEPQUOT_MASK; - cpr_write(drv, REG_RBCPR_STEP_QUOT, step_quot); - - /* Clear the target quotient value and gate count of all ROs */ - for (i = 0; i < CPR_NUM_RING_OSC; i++) - cpr_write(drv, REG_RBCPR_GCNT_TARGET(i), 0); - - cpr_write(drv, REG_RBCPR_GCNT_TARGET(ro_sel), gcnt); - ctl = corner->save_ctl; - cpr_write(drv, REG_RBCPR_CTL, ctl); - irq = corner->save_irq; - cpr_irq_set(drv, irq); - dev_dbg(drv->dev, "gcnt = %#08x, ctl = %#08x, irq = %#08x\n", gcnt, - ctl, irq); -} - -static void cpr_set_acc(struct regmap *tcsr, struct fuse_corner *f, - struct fuse_corner *end) -{ - if (f == end) - return; - - if (f < end) { - for (f += 1; f <= end; f++) - regmap_multi_reg_write(tcsr, f->accs, f->num_accs); - } else { - for (f -= 1; f >= end; f--) - regmap_multi_reg_write(tcsr, f->accs, f->num_accs); - } -} - -static int cpr_pre_voltage(struct cpr_drv *drv, - struct fuse_corner *fuse_corner, - enum voltage_change_dir dir) -{ - struct fuse_corner *prev_fuse_corner = drv->corner->fuse_corner; - - if (drv->tcsr && dir == DOWN) - cpr_set_acc(drv->tcsr, prev_fuse_corner, fuse_corner); - - return 0; -} - -static int cpr_post_voltage(struct cpr_drv *drv, - struct fuse_corner *fuse_corner, - enum voltage_change_dir dir) -{ - struct fuse_corner *prev_fuse_corner = drv->corner->fuse_corner; - - if (drv->tcsr && dir == UP) - cpr_set_acc(drv->tcsr, prev_fuse_corner, fuse_corner); - - return 0; -} - -static int cpr_scale_voltage(struct cpr_drv *drv, struct corner *corner, - int new_uV, enum voltage_change_dir dir) -{ - int ret; - struct fuse_corner *fuse_corner = corner->fuse_corner; - - ret = cpr_pre_voltage(drv, fuse_corner, dir); - if (ret) - return ret; - - ret = regulator_set_voltage(drv->vdd_apc, new_uV, new_uV); - if (ret) { - dev_err_ratelimited(drv->dev, "failed to set apc voltage %d\n", - new_uV); - return ret; - } - - ret = cpr_post_voltage(drv, fuse_corner, dir); - if (ret) - return ret; - - return 0; -} - -static unsigned int cpr_get_cur_perf_state(struct cpr_drv *drv) -{ - return drv->corner ? drv->corner - drv->corners + 1 : 0; -} - -static int cpr_scale(struct cpr_drv *drv, enum voltage_change_dir dir) -{ - u32 val, error_steps, reg_mask; - int last_uV, new_uV, step_uV, ret; - struct corner *corner; - const struct cpr_desc *desc = drv->desc; - - if (dir != UP && dir != DOWN) - return 0; - - step_uV = regulator_get_linear_step(drv->vdd_apc); - if (!step_uV) - return -EINVAL; - - corner = drv->corner; - - val = cpr_read(drv, REG_RBCPR_RESULT_0); - - error_steps = val >> RBCPR_RESULT0_ERROR_STEPS_SHIFT; - error_steps &= RBCPR_RESULT0_ERROR_STEPS_MASK; - last_uV = corner->last_uV; - - if (dir == UP) { - if (desc->clamp_timer_interval && - error_steps < desc->up_threshold) { - /* - * Handle the case where another measurement started - * after the interrupt was triggered due to a core - * exiting from power collapse. - */ - error_steps = max(desc->up_threshold, - desc->vdd_apc_step_up_limit); - } - - if (last_uV >= corner->max_uV) { - cpr_irq_clr_nack(drv); - - /* Maximize the UP threshold */ - reg_mask = RBCPR_CTL_UP_THRESHOLD_MASK; - reg_mask <<= RBCPR_CTL_UP_THRESHOLD_SHIFT; - val = reg_mask; - cpr_ctl_modify(drv, reg_mask, val); - - /* Disable UP interrupt */ - cpr_irq_set(drv, CPR_INT_DEFAULT & ~CPR_INT_UP); - - return 0; - } - - if (error_steps > desc->vdd_apc_step_up_limit) - error_steps = desc->vdd_apc_step_up_limit; - - /* Calculate new voltage */ - new_uV = last_uV + error_steps * step_uV; - new_uV = min(new_uV, corner->max_uV); - - dev_dbg(drv->dev, - "UP: -> new_uV: %d last_uV: %d perf state: %u\n", - new_uV, last_uV, cpr_get_cur_perf_state(drv)); - } else { - if (desc->clamp_timer_interval && - error_steps < desc->down_threshold) { - /* - * Handle the case where another measurement started - * after the interrupt was triggered due to a core - * exiting from power collapse. - */ - error_steps = max(desc->down_threshold, - desc->vdd_apc_step_down_limit); - } - - if (last_uV <= corner->min_uV) { - cpr_irq_clr_nack(drv); - - /* Enable auto nack down */ - reg_mask = RBCPR_CTL_SW_AUTO_CONT_NACK_DN_EN; - val = RBCPR_CTL_SW_AUTO_CONT_NACK_DN_EN; - - cpr_ctl_modify(drv, reg_mask, val); - - /* Disable DOWN interrupt */ - cpr_irq_set(drv, CPR_INT_DEFAULT & ~CPR_INT_DOWN); - - return 0; - } - - if (error_steps > desc->vdd_apc_step_down_limit) - error_steps = desc->vdd_apc_step_down_limit; - - /* Calculate new voltage */ - new_uV = last_uV - error_steps * step_uV; - new_uV = max(new_uV, corner->min_uV); - - dev_dbg(drv->dev, - "DOWN: -> new_uV: %d last_uV: %d perf state: %u\n", - new_uV, last_uV, cpr_get_cur_perf_state(drv)); - } - - ret = cpr_scale_voltage(drv, corner, new_uV, dir); - if (ret) { - cpr_irq_clr_nack(drv); - return ret; - } - drv->corner->last_uV = new_uV; - - if (dir == UP) { - /* Disable auto nack down */ - reg_mask = RBCPR_CTL_SW_AUTO_CONT_NACK_DN_EN; - val = 0; - } else { - /* Restore default threshold for UP */ - reg_mask = RBCPR_CTL_UP_THRESHOLD_MASK; - reg_mask <<= RBCPR_CTL_UP_THRESHOLD_SHIFT; - val = desc->up_threshold; - val <<= RBCPR_CTL_UP_THRESHOLD_SHIFT; - } - - cpr_ctl_modify(drv, reg_mask, val); - - /* Re-enable default interrupts */ - cpr_irq_set(drv, CPR_INT_DEFAULT); - - /* Ack */ - cpr_irq_clr_ack(drv); - - return 0; -} - -static irqreturn_t cpr_irq_handler(int irq, void *dev) -{ - struct cpr_drv *drv = dev; - const struct cpr_desc *desc = drv->desc; - irqreturn_t ret = IRQ_HANDLED; - u32 val; - - mutex_lock(&drv->lock); - - val = cpr_read(drv, REG_RBIF_IRQ_STATUS); - if (drv->flags & FLAGS_IGNORE_1ST_IRQ_STATUS) - val = cpr_read(drv, REG_RBIF_IRQ_STATUS); - - dev_dbg(drv->dev, "IRQ_STATUS = %#02x\n", val); - - if (!cpr_ctl_is_enabled(drv)) { - dev_dbg(drv->dev, "CPR is disabled\n"); - ret = IRQ_NONE; - } else if (cpr_ctl_is_busy(drv) && !desc->clamp_timer_interval) { - dev_dbg(drv->dev, "CPR measurement is not ready\n"); - } else if (!cpr_is_allowed(drv)) { - val = cpr_read(drv, REG_RBCPR_CTL); - dev_err_ratelimited(drv->dev, - "Interrupt broken? RBCPR_CTL = %#02x\n", - val); - ret = IRQ_NONE; - } else { - /* - * Following sequence of handling is as per each IRQ's - * priority - */ - if (val & CPR_INT_UP) { - cpr_scale(drv, UP); - } else if (val & CPR_INT_DOWN) { - cpr_scale(drv, DOWN); - } else if (val & CPR_INT_MIN) { - cpr_irq_clr_nack(drv); - } else if (val & CPR_INT_MAX) { - cpr_irq_clr_nack(drv); - } else if (val & CPR_INT_MID) { - /* RBCPR_CTL_SW_AUTO_CONT_ACK_EN is enabled */ - dev_dbg(drv->dev, "IRQ occurred for Mid Flag\n"); - } else { - dev_dbg(drv->dev, - "IRQ occurred for unknown flag (%#08x)\n", val); - } - - /* Save register values for the corner */ - cpr_corner_save(drv, drv->corner); - } - - mutex_unlock(&drv->lock); - - return ret; -} - -static int cpr_enable(struct cpr_drv *drv) -{ - int ret; - - ret = regulator_enable(drv->vdd_apc); - if (ret) - return ret; - - mutex_lock(&drv->lock); - - if (cpr_is_allowed(drv) && drv->corner) { - cpr_irq_clr(drv); - cpr_corner_restore(drv, drv->corner); - cpr_ctl_enable(drv, drv->corner); - } - - mutex_unlock(&drv->lock); - - return 0; -} - -static int cpr_disable(struct cpr_drv *drv) -{ - mutex_lock(&drv->lock); - - if (cpr_is_allowed(drv)) { - cpr_ctl_disable(drv); - cpr_irq_clr(drv); - } - - mutex_unlock(&drv->lock); - - return regulator_disable(drv->vdd_apc); -} - -static int cpr_config(struct cpr_drv *drv) -{ - int i; - u32 val, gcnt; - struct corner *corner; - const struct cpr_desc *desc = drv->desc; - - /* Disable interrupt and CPR */ - cpr_write(drv, REG_RBIF_IRQ_EN(0), 0); - cpr_write(drv, REG_RBCPR_CTL, 0); - - /* Program the default HW ceiling, floor and vlevel */ - val = (RBIF_LIMIT_CEILING_DEFAULT & RBIF_LIMIT_CEILING_MASK) - << RBIF_LIMIT_CEILING_SHIFT; - val |= RBIF_LIMIT_FLOOR_DEFAULT & RBIF_LIMIT_FLOOR_MASK; - cpr_write(drv, REG_RBIF_LIMIT, val); - cpr_write(drv, REG_RBIF_SW_VLEVEL, RBIF_SW_VLEVEL_DEFAULT); - - /* - * Clear the target quotient value and gate count of all - * ring oscillators - */ - for (i = 0; i < CPR_NUM_RING_OSC; i++) - cpr_write(drv, REG_RBCPR_GCNT_TARGET(i), 0); - - /* Init and save gcnt */ - gcnt = (drv->ref_clk_khz * desc->gcnt_us) / 1000; - gcnt = gcnt & RBCPR_GCNT_TARGET_GCNT_MASK; - gcnt <<= RBCPR_GCNT_TARGET_GCNT_SHIFT; - drv->gcnt = gcnt; - - /* Program the delay count for the timer */ - val = (drv->ref_clk_khz * desc->timer_delay_us) / 1000; - cpr_write(drv, REG_RBCPR_TIMER_INTERVAL, val); - dev_dbg(drv->dev, "Timer count: %#0x (for %d us)\n", val, - desc->timer_delay_us); - - /* Program Consecutive Up & Down */ - val = desc->timer_cons_down << RBIF_TIMER_ADJ_CONS_DOWN_SHIFT; - val |= desc->timer_cons_up << RBIF_TIMER_ADJ_CONS_UP_SHIFT; - val |= desc->clamp_timer_interval << RBIF_TIMER_ADJ_CLAMP_INT_SHIFT; - cpr_write(drv, REG_RBIF_TIMER_ADJUST, val); - - /* Program the control register */ - val = desc->up_threshold << RBCPR_CTL_UP_THRESHOLD_SHIFT; - val |= desc->down_threshold << RBCPR_CTL_DN_THRESHOLD_SHIFT; - val |= RBCPR_CTL_TIMER_EN | RBCPR_CTL_COUNT_MODE; - val |= RBCPR_CTL_SW_AUTO_CONT_ACK_EN; - cpr_write(drv, REG_RBCPR_CTL, val); - - for (i = 0; i < drv->num_corners; i++) { - corner = &drv->corners[i]; - corner->save_ctl = val; - corner->save_irq = CPR_INT_DEFAULT; - } - - cpr_irq_set(drv, CPR_INT_DEFAULT); - - val = cpr_read(drv, REG_RBCPR_VERSION); - if (val <= RBCPR_VER_2) - drv->flags |= FLAGS_IGNORE_1ST_IRQ_STATUS; - - return 0; -} - -static int cpr_set_performance_state(struct generic_pm_domain *domain, - unsigned int state) -{ - struct cpr_drv *drv = container_of(domain, struct cpr_drv, pd); - struct corner *corner, *end; - enum voltage_change_dir dir; - int ret = 0, new_uV; - - mutex_lock(&drv->lock); - - dev_dbg(drv->dev, "%s: setting perf state: %u (prev state: %u)\n", - __func__, state, cpr_get_cur_perf_state(drv)); - - /* - * Determine new corner we're going to. - * Remove one since lowest performance state is 1. - */ - corner = drv->corners + state - 1; - end = &drv->corners[drv->num_corners - 1]; - if (corner > end || corner < drv->corners) { - ret = -EINVAL; - goto unlock; - } - - /* Determine direction */ - if (drv->corner > corner) - dir = DOWN; - else if (drv->corner < corner) - dir = UP; - else - dir = NO_CHANGE; - - if (cpr_is_allowed(drv)) - new_uV = corner->last_uV; - else - new_uV = corner->uV; - - if (cpr_is_allowed(drv)) - cpr_ctl_disable(drv); - - ret = cpr_scale_voltage(drv, corner, new_uV, dir); - if (ret) - goto unlock; - - if (cpr_is_allowed(drv)) { - cpr_irq_clr(drv); - if (drv->corner != corner) - cpr_corner_restore(drv, corner); - cpr_ctl_enable(drv, corner); - } - - drv->corner = corner; - -unlock: - mutex_unlock(&drv->lock); - - return ret; -} - -static int cpr_read_efuse(struct device *dev, const char *cname, u32 *data) -{ - struct nvmem_cell *cell; - ssize_t len; - char *ret; - int i; - - *data = 0; - - cell = nvmem_cell_get(dev, cname); - if (IS_ERR(cell)) { - if (PTR_ERR(cell) != -EPROBE_DEFER) - dev_err(dev, "undefined cell %s\n", cname); - return PTR_ERR(cell); - } - - ret = nvmem_cell_read(cell, &len); - nvmem_cell_put(cell); - if (IS_ERR(ret)) { - dev_err(dev, "can't read cell %s\n", cname); - return PTR_ERR(ret); - } - - for (i = 0; i < len; i++) - *data |= ret[i] << (8 * i); - - kfree(ret); - dev_dbg(dev, "efuse read(%s) = %x, bytes %zd\n", cname, *data, len); - - return 0; -} - -static int -cpr_populate_ring_osc_idx(struct cpr_drv *drv) -{ - struct fuse_corner *fuse = drv->fuse_corners; - struct fuse_corner *end = fuse + drv->desc->num_fuse_corners; - const struct cpr_fuse *fuses = drv->cpr_fuses; - u32 data; - int ret; - - for (; fuse < end; fuse++, fuses++) { - ret = cpr_read_efuse(drv->dev, fuses->ring_osc, - &data); - if (ret) - return ret; - fuse->ring_osc_idx = data; - } - - return 0; -} - -static int cpr_read_fuse_uV(const struct cpr_desc *desc, - const struct fuse_corner_data *fdata, - const char *init_v_efuse, - int step_volt, - struct cpr_drv *drv) -{ - int step_size_uV, steps, uV; - u32 bits = 0; - int ret; - - ret = cpr_read_efuse(drv->dev, init_v_efuse, &bits); - if (ret) - return ret; - - steps = bits & ~BIT(desc->cpr_fuses.init_voltage_width - 1); - /* Not two's complement.. instead highest bit is sign bit */ - if (bits & BIT(desc->cpr_fuses.init_voltage_width - 1)) - steps = -steps; - - step_size_uV = desc->cpr_fuses.init_voltage_step; - - uV = fdata->ref_uV + steps * step_size_uV; - return DIV_ROUND_UP(uV, step_volt) * step_volt; -} - -static int cpr_fuse_corner_init(struct cpr_drv *drv) -{ - const struct cpr_desc *desc = drv->desc; - const struct cpr_fuse *fuses = drv->cpr_fuses; - const struct acc_desc *acc_desc = drv->acc_desc; - int i; - unsigned int step_volt; - struct fuse_corner_data *fdata; - struct fuse_corner *fuse, *end; - int uV; - const struct reg_sequence *accs; - int ret; - - accs = acc_desc->settings; - - step_volt = regulator_get_linear_step(drv->vdd_apc); - if (!step_volt) - return -EINVAL; - - /* Populate fuse_corner members */ - fuse = drv->fuse_corners; - end = &fuse[desc->num_fuse_corners - 1]; - fdata = desc->cpr_fuses.fuse_corner_data; - - for (i = 0; fuse <= end; fuse++, fuses++, i++, fdata++) { - /* - * Update SoC voltages: platforms might choose a different - * regulators than the one used to characterize the algorithms - * (ie, init_voltage_step). - */ - fdata->min_uV = roundup(fdata->min_uV, step_volt); - fdata->max_uV = roundup(fdata->max_uV, step_volt); - - /* Populate uV */ - uV = cpr_read_fuse_uV(desc, fdata, fuses->init_voltage, - step_volt, drv); - if (uV < 0) - return uV; - - fuse->min_uV = fdata->min_uV; - fuse->max_uV = fdata->max_uV; - fuse->uV = clamp(uV, fuse->min_uV, fuse->max_uV); - - if (fuse == end) { - /* - * Allow the highest fuse corner's PVS voltage to - * define the ceiling voltage for that corner in order - * to support SoC's in which variable ceiling values - * are required. - */ - end->max_uV = max(end->max_uV, end->uV); - } - - /* Populate target quotient by scaling */ - ret = cpr_read_efuse(drv->dev, fuses->quotient, &fuse->quot); - if (ret) - return ret; - - fuse->quot *= fdata->quot_scale; - fuse->quot += fdata->quot_offset; - fuse->quot += fdata->quot_adjust; - fuse->step_quot = desc->step_quot[fuse->ring_osc_idx]; - - /* Populate acc settings */ - fuse->accs = accs; - fuse->num_accs = acc_desc->num_regs_per_fuse; - accs += acc_desc->num_regs_per_fuse; - } - - /* - * Restrict all fuse corner PVS voltages based upon per corner - * ceiling and floor voltages. - */ - for (fuse = drv->fuse_corners, i = 0; fuse <= end; fuse++, i++) { - if (fuse->uV > fuse->max_uV) - fuse->uV = fuse->max_uV; - else if (fuse->uV < fuse->min_uV) - fuse->uV = fuse->min_uV; - - ret = regulator_is_supported_voltage(drv->vdd_apc, - fuse->min_uV, - fuse->min_uV); - if (!ret) { - dev_err(drv->dev, - "min uV: %d (fuse corner: %d) not supported by regulator\n", - fuse->min_uV, i); - return -EINVAL; - } - - ret = regulator_is_supported_voltage(drv->vdd_apc, - fuse->max_uV, - fuse->max_uV); - if (!ret) { - dev_err(drv->dev, - "max uV: %d (fuse corner: %d) not supported by regulator\n", - fuse->max_uV, i); - return -EINVAL; - } - - dev_dbg(drv->dev, - "fuse corner %d: [%d %d %d] RO%hhu quot %d squot %d\n", - i, fuse->min_uV, fuse->uV, fuse->max_uV, - fuse->ring_osc_idx, fuse->quot, fuse->step_quot); - } - - return 0; -} - -static int cpr_calculate_scaling(const char *quot_offset, - struct cpr_drv *drv, - const struct fuse_corner_data *fdata, - const struct corner *corner) -{ - u32 quot_diff = 0; - unsigned long freq_diff; - int scaling; - const struct fuse_corner *fuse, *prev_fuse; - int ret; - - fuse = corner->fuse_corner; - prev_fuse = fuse - 1; - - if (quot_offset) { - ret = cpr_read_efuse(drv->dev, quot_offset, "_diff); - if (ret) - return ret; - - quot_diff *= fdata->quot_offset_scale; - quot_diff += fdata->quot_offset_adjust; - } else { - quot_diff = fuse->quot - prev_fuse->quot; - } - - freq_diff = fuse->max_freq - prev_fuse->max_freq; - freq_diff /= 1000000; /* Convert to MHz */ - scaling = 1000 * quot_diff / freq_diff; - return min(scaling, fdata->max_quot_scale); -} - -static int cpr_interpolate(const struct corner *corner, int step_volt, - const struct fuse_corner_data *fdata) -{ - unsigned long f_high, f_low, f_diff; - int uV_high, uV_low, uV; - u64 temp, temp_limit; - const struct fuse_corner *fuse, *prev_fuse; - - fuse = corner->fuse_corner; - prev_fuse = fuse - 1; - - f_high = fuse->max_freq; - f_low = prev_fuse->max_freq; - uV_high = fuse->uV; - uV_low = prev_fuse->uV; - f_diff = fuse->max_freq - corner->freq; - - /* - * Don't interpolate in the wrong direction. This could happen - * if the adjusted fuse voltage overlaps with the previous fuse's - * adjusted voltage. - */ - if (f_high <= f_low || uV_high <= uV_low || f_high <= corner->freq) - return corner->uV; - - temp = f_diff * (uV_high - uV_low); - do_div(temp, f_high - f_low); - - /* - * max_volt_scale has units of uV/MHz while freq values - * have units of Hz. Divide by 1000000 to convert to. - */ - temp_limit = f_diff * fdata->max_volt_scale; - do_div(temp_limit, 1000000); - - uV = uV_high - min(temp, temp_limit); - return roundup(uV, step_volt); -} - -static unsigned int cpr_get_fuse_corner(struct dev_pm_opp *opp) -{ - struct device_node *np; - unsigned int fuse_corner = 0; - - np = dev_pm_opp_get_of_node(opp); - if (of_property_read_u32(np, "qcom,opp-fuse-level", &fuse_corner)) - pr_err("%s: missing 'qcom,opp-fuse-level' property\n", - __func__); - - of_node_put(np); - - return fuse_corner; -} - -static unsigned long cpr_get_opp_hz_for_req(struct dev_pm_opp *ref, - struct device *cpu_dev) -{ - u64 rate = 0; - struct device_node *ref_np; - struct device_node *desc_np; - struct device_node *child_np = NULL; - struct device_node *child_req_np = NULL; - - desc_np = dev_pm_opp_of_get_opp_desc_node(cpu_dev); - if (!desc_np) - return 0; - - ref_np = dev_pm_opp_get_of_node(ref); - if (!ref_np) - goto out_ref; - - do { - of_node_put(child_req_np); - child_np = of_get_next_available_child(desc_np, child_np); - child_req_np = of_parse_phandle(child_np, "required-opps", 0); - } while (child_np && child_req_np != ref_np); - - if (child_np && child_req_np == ref_np) - of_property_read_u64(child_np, "opp-hz", &rate); - - of_node_put(child_req_np); - of_node_put(child_np); - of_node_put(ref_np); -out_ref: - of_node_put(desc_np); - - return (unsigned long) rate; -} - -static int cpr_corner_init(struct cpr_drv *drv) -{ - const struct cpr_desc *desc = drv->desc; - const struct cpr_fuse *fuses = drv->cpr_fuses; - int i, level, scaling = 0; - unsigned int fnum, fc; - const char *quot_offset; - struct fuse_corner *fuse, *prev_fuse; - struct corner *corner, *end; - struct corner_data *cdata; - const struct fuse_corner_data *fdata; - bool apply_scaling; - unsigned long freq_diff, freq_diff_mhz; - unsigned long freq; - int step_volt = regulator_get_linear_step(drv->vdd_apc); - struct dev_pm_opp *opp; - - if (!step_volt) - return -EINVAL; - - corner = drv->corners; - end = &corner[drv->num_corners - 1]; - - cdata = devm_kcalloc(drv->dev, drv->num_corners, - sizeof(struct corner_data), - GFP_KERNEL); - if (!cdata) - return -ENOMEM; - - /* - * Store maximum frequency for each fuse corner based on the frequency - * plan - */ - for (level = 1; level <= drv->num_corners; level++) { - opp = dev_pm_opp_find_level_exact(&drv->pd.dev, level); - if (IS_ERR(opp)) - return -EINVAL; - fc = cpr_get_fuse_corner(opp); - if (!fc) { - dev_pm_opp_put(opp); - return -EINVAL; - } - fnum = fc - 1; - freq = cpr_get_opp_hz_for_req(opp, drv->attached_cpu_dev); - if (!freq) { - dev_pm_opp_put(opp); - return -EINVAL; - } - cdata[level - 1].fuse_corner = fnum; - cdata[level - 1].freq = freq; - - fuse = &drv->fuse_corners[fnum]; - dev_dbg(drv->dev, "freq: %lu level: %u fuse level: %u\n", - freq, dev_pm_opp_get_level(opp) - 1, fnum); - if (freq > fuse->max_freq) - fuse->max_freq = freq; - dev_pm_opp_put(opp); - } - - /* - * Get the quotient adjustment scaling factor, according to: - * - * scaling = min(1000 * (QUOT(corner_N) - QUOT(corner_N-1)) - * / (freq(corner_N) - freq(corner_N-1)), max_factor) - * - * QUOT(corner_N): quotient read from fuse for fuse corner N - * QUOT(corner_N-1): quotient read from fuse for fuse corner (N - 1) - * freq(corner_N): max frequency in MHz supported by fuse corner N - * freq(corner_N-1): max frequency in MHz supported by fuse corner - * (N - 1) - * - * Then walk through the corners mapped to each fuse corner - * and calculate the quotient adjustment for each one using the - * following formula: - * - * quot_adjust = (freq_max - freq_corner) * scaling / 1000 - * - * freq_max: max frequency in MHz supported by the fuse corner - * freq_corner: frequency in MHz corresponding to the corner - * scaling: calculated from above equation - * - * - * + + - * | v | - * q | f c o | f c - * u | c l | c - * o | f t | f - * t | c a | c - * | c f g | c f - * | e | - * +--------------- +---------------- - * 0 1 2 3 4 5 6 0 1 2 3 4 5 6 - * corner corner - * - * c = corner - * f = fuse corner - * - */ - for (apply_scaling = false, i = 0; corner <= end; corner++, i++) { - fnum = cdata[i].fuse_corner; - fdata = &desc->cpr_fuses.fuse_corner_data[fnum]; - quot_offset = fuses[fnum].quotient_offset; - fuse = &drv->fuse_corners[fnum]; - if (fnum) - prev_fuse = &drv->fuse_corners[fnum - 1]; - else - prev_fuse = NULL; - - corner->fuse_corner = fuse; - corner->freq = cdata[i].freq; - corner->uV = fuse->uV; - - if (prev_fuse && cdata[i - 1].freq == prev_fuse->max_freq) { - scaling = cpr_calculate_scaling(quot_offset, drv, - fdata, corner); - if (scaling < 0) - return scaling; - - apply_scaling = true; - } else if (corner->freq == fuse->max_freq) { - /* This is a fuse corner; don't scale anything */ - apply_scaling = false; - } - - if (apply_scaling) { - freq_diff = fuse->max_freq - corner->freq; - freq_diff_mhz = freq_diff / 1000000; - corner->quot_adjust = scaling * freq_diff_mhz / 1000; - - corner->uV = cpr_interpolate(corner, step_volt, fdata); - } - - corner->max_uV = fuse->max_uV; - corner->min_uV = fuse->min_uV; - corner->uV = clamp(corner->uV, corner->min_uV, corner->max_uV); - corner->last_uV = corner->uV; - - /* Reduce the ceiling voltage if needed */ - if (desc->reduce_to_corner_uV && corner->uV < corner->max_uV) - corner->max_uV = corner->uV; - else if (desc->reduce_to_fuse_uV && fuse->uV < corner->max_uV) - corner->max_uV = max(corner->min_uV, fuse->uV); - - dev_dbg(drv->dev, "corner %d: [%d %d %d] quot %d\n", i, - corner->min_uV, corner->uV, corner->max_uV, - fuse->quot - corner->quot_adjust); - } - - return 0; -} - -static const struct cpr_fuse *cpr_get_fuses(struct cpr_drv *drv) -{ - const struct cpr_desc *desc = drv->desc; - struct cpr_fuse *fuses; - int i; - - fuses = devm_kcalloc(drv->dev, desc->num_fuse_corners, - sizeof(struct cpr_fuse), - GFP_KERNEL); - if (!fuses) - return ERR_PTR(-ENOMEM); - - for (i = 0; i < desc->num_fuse_corners; i++) { - char tbuf[32]; - - snprintf(tbuf, 32, "cpr_ring_osc%d", i + 1); - fuses[i].ring_osc = devm_kstrdup(drv->dev, tbuf, GFP_KERNEL); - if (!fuses[i].ring_osc) - return ERR_PTR(-ENOMEM); - - snprintf(tbuf, 32, "cpr_init_voltage%d", i + 1); - fuses[i].init_voltage = devm_kstrdup(drv->dev, tbuf, - GFP_KERNEL); - if (!fuses[i].init_voltage) - return ERR_PTR(-ENOMEM); - - snprintf(tbuf, 32, "cpr_quotient%d", i + 1); - fuses[i].quotient = devm_kstrdup(drv->dev, tbuf, GFP_KERNEL); - if (!fuses[i].quotient) - return ERR_PTR(-ENOMEM); - - snprintf(tbuf, 32, "cpr_quotient_offset%d", i + 1); - fuses[i].quotient_offset = devm_kstrdup(drv->dev, tbuf, - GFP_KERNEL); - if (!fuses[i].quotient_offset) - return ERR_PTR(-ENOMEM); - } - - return fuses; -} - -static void cpr_set_loop_allowed(struct cpr_drv *drv) -{ - drv->loop_disabled = false; -} - -static int cpr_init_parameters(struct cpr_drv *drv) -{ - const struct cpr_desc *desc = drv->desc; - struct clk *clk; - - clk = clk_get(drv->dev, "ref"); - if (IS_ERR(clk)) - return PTR_ERR(clk); - - drv->ref_clk_khz = clk_get_rate(clk) / 1000; - clk_put(clk); - - if (desc->timer_cons_up > RBIF_TIMER_ADJ_CONS_UP_MASK || - desc->timer_cons_down > RBIF_TIMER_ADJ_CONS_DOWN_MASK || - desc->up_threshold > RBCPR_CTL_UP_THRESHOLD_MASK || - desc->down_threshold > RBCPR_CTL_DN_THRESHOLD_MASK || - desc->idle_clocks > RBCPR_STEP_QUOT_IDLE_CLK_MASK || - desc->clamp_timer_interval > RBIF_TIMER_ADJ_CLAMP_INT_MASK) - return -EINVAL; - - dev_dbg(drv->dev, "up threshold = %u, down threshold = %u\n", - desc->up_threshold, desc->down_threshold); - - return 0; -} - -static int cpr_find_initial_corner(struct cpr_drv *drv) -{ - unsigned long rate; - const struct corner *end; - struct corner *iter; - unsigned int i = 0; - - if (!drv->cpu_clk) { - dev_err(drv->dev, "cannot get rate from NULL clk\n"); - return -EINVAL; - } - - end = &drv->corners[drv->num_corners - 1]; - rate = clk_get_rate(drv->cpu_clk); - - /* - * Some bootloaders set a CPU clock frequency that is not defined - * in the OPP table. When running at an unlisted frequency, - * cpufreq_online() will change to the OPP which has the lowest - * frequency, at or above the unlisted frequency. - * Since cpufreq_online() always "rounds up" in the case of an - * unlisted frequency, this function always "rounds down" in case - * of an unlisted frequency. That way, when cpufreq_online() - * triggers the first ever call to cpr_set_performance_state(), - * it will correctly determine the direction as UP. - */ - for (iter = drv->corners; iter <= end; iter++) { - if (iter->freq > rate) - break; - i++; - if (iter->freq == rate) { - drv->corner = iter; - break; - } - if (iter->freq < rate) - drv->corner = iter; - } - - if (!drv->corner) { - dev_err(drv->dev, "boot up corner not found\n"); - return -EINVAL; - } - - dev_dbg(drv->dev, "boot up perf state: %u\n", i); - - return 0; -} - -static const struct cpr_desc qcs404_cpr_desc = { - .num_fuse_corners = 3, - .min_diff_quot = CPR_FUSE_MIN_QUOT_DIFF, - .step_quot = (int []){ 25, 25, 25, }, - .timer_delay_us = 5000, - .timer_cons_up = 0, - .timer_cons_down = 2, - .up_threshold = 1, - .down_threshold = 3, - .idle_clocks = 15, - .gcnt_us = 1, - .vdd_apc_step_up_limit = 1, - .vdd_apc_step_down_limit = 1, - .cpr_fuses = { - .init_voltage_step = 8000, - .init_voltage_width = 6, - .fuse_corner_data = (struct fuse_corner_data[]){ - /* fuse corner 0 */ - { - .ref_uV = 1224000, - .max_uV = 1224000, - .min_uV = 1048000, - .max_volt_scale = 0, - .max_quot_scale = 0, - .quot_offset = 0, - .quot_scale = 1, - .quot_adjust = 0, - .quot_offset_scale = 5, - .quot_offset_adjust = 0, - }, - /* fuse corner 1 */ - { - .ref_uV = 1288000, - .max_uV = 1288000, - .min_uV = 1048000, - .max_volt_scale = 2000, - .max_quot_scale = 1400, - .quot_offset = 0, - .quot_scale = 1, - .quot_adjust = -20, - .quot_offset_scale = 5, - .quot_offset_adjust = 0, - }, - /* fuse corner 2 */ - { - .ref_uV = 1352000, - .max_uV = 1384000, - .min_uV = 1088000, - .max_volt_scale = 2000, - .max_quot_scale = 1400, - .quot_offset = 0, - .quot_scale = 1, - .quot_adjust = 0, - .quot_offset_scale = 5, - .quot_offset_adjust = 0, - }, - }, - }, -}; - -static const struct acc_desc qcs404_acc_desc = { - .settings = (struct reg_sequence[]){ - { 0xb120, 0x1041040 }, - { 0xb124, 0x41 }, - { 0xb120, 0x0 }, - { 0xb124, 0x0 }, - { 0xb120, 0x0 }, - { 0xb124, 0x0 }, - }, - .config = (struct reg_sequence[]){ - { 0xb138, 0xff }, - { 0xb130, 0x5555 }, - }, - .num_regs_per_fuse = 2, -}; - -static const struct cpr_acc_desc qcs404_cpr_acc_desc = { - .cpr_desc = &qcs404_cpr_desc, - .acc_desc = &qcs404_acc_desc, -}; - -static unsigned int cpr_get_performance_state(struct generic_pm_domain *genpd, - struct dev_pm_opp *opp) -{ - return dev_pm_opp_get_level(opp); -} - -static int cpr_power_off(struct generic_pm_domain *domain) -{ - struct cpr_drv *drv = container_of(domain, struct cpr_drv, pd); - - return cpr_disable(drv); -} - -static int cpr_power_on(struct generic_pm_domain *domain) -{ - struct cpr_drv *drv = container_of(domain, struct cpr_drv, pd); - - return cpr_enable(drv); -} - -static int cpr_pd_attach_dev(struct generic_pm_domain *domain, - struct device *dev) -{ - struct cpr_drv *drv = container_of(domain, struct cpr_drv, pd); - const struct acc_desc *acc_desc = drv->acc_desc; - int ret = 0; - - mutex_lock(&drv->lock); - - dev_dbg(drv->dev, "attach callback for: %s\n", dev_name(dev)); - - /* - * This driver only supports scaling voltage for a CPU cluster - * where all CPUs in the cluster share a single regulator. - * Therefore, save the struct device pointer only for the first - * CPU device that gets attached. There is no need to do any - * additional initialization when further CPUs get attached. - */ - if (drv->attached_cpu_dev) - goto unlock; - - /* - * cpr_scale_voltage() requires the direction (if we are changing - * to a higher or lower OPP). The first time - * cpr_set_performance_state() is called, there is no previous - * performance state defined. Therefore, we call - * cpr_find_initial_corner() that gets the CPU clock frequency - * set by the bootloader, so that we can determine the direction - * the first time cpr_set_performance_state() is called. - */ - drv->cpu_clk = devm_clk_get(dev, NULL); - if (IS_ERR(drv->cpu_clk)) { - ret = PTR_ERR(drv->cpu_clk); - if (ret != -EPROBE_DEFER) - dev_err(drv->dev, "could not get cpu clk: %d\n", ret); - goto unlock; - } - drv->attached_cpu_dev = dev; - - dev_dbg(drv->dev, "using cpu clk from: %s\n", - dev_name(drv->attached_cpu_dev)); - - /* - * Everything related to (virtual) corners has to be initialized - * here, when attaching to the power domain, since we need to know - * the maximum frequency for each fuse corner, and this is only - * available after the cpufreq driver has attached to us. - * The reason for this is that we need to know the highest - * frequency associated with each fuse corner. - */ - ret = dev_pm_opp_get_opp_count(&drv->pd.dev); - if (ret < 0) { - dev_err(drv->dev, "could not get OPP count\n"); - goto unlock; - } - drv->num_corners = ret; - - if (drv->num_corners < 2) { - dev_err(drv->dev, "need at least 2 OPPs to use CPR\n"); - ret = -EINVAL; - goto unlock; - } - - drv->corners = devm_kcalloc(drv->dev, drv->num_corners, - sizeof(*drv->corners), - GFP_KERNEL); - if (!drv->corners) { - ret = -ENOMEM; - goto unlock; - } - - ret = cpr_corner_init(drv); - if (ret) - goto unlock; - - cpr_set_loop_allowed(drv); - - ret = cpr_init_parameters(drv); - if (ret) - goto unlock; - - /* Configure CPR HW but keep it disabled */ - ret = cpr_config(drv); - if (ret) - goto unlock; - - ret = cpr_find_initial_corner(drv); - if (ret) - goto unlock; - - if (acc_desc->config) - regmap_multi_reg_write(drv->tcsr, acc_desc->config, - acc_desc->num_regs_per_fuse); - - /* Enable ACC if required */ - if (acc_desc->enable_mask) - regmap_update_bits(drv->tcsr, acc_desc->enable_reg, - acc_desc->enable_mask, - acc_desc->enable_mask); - - dev_info(drv->dev, "driver initialized with %u OPPs\n", - drv->num_corners); - -unlock: - mutex_unlock(&drv->lock); - - return ret; -} - -static int cpr_debug_info_show(struct seq_file *s, void *unused) -{ - u32 gcnt, ro_sel, ctl, irq_status, reg, error_steps; - u32 step_dn, step_up, error, error_lt0, busy; - struct cpr_drv *drv = s->private; - struct fuse_corner *fuse_corner; - struct corner *corner; - - corner = drv->corner; - fuse_corner = corner->fuse_corner; - - seq_printf(s, "corner, current_volt = %d uV\n", - corner->last_uV); - - ro_sel = fuse_corner->ring_osc_idx; - gcnt = cpr_read(drv, REG_RBCPR_GCNT_TARGET(ro_sel)); - seq_printf(s, "rbcpr_gcnt_target (%u) = %#02X\n", ro_sel, gcnt); - - ctl = cpr_read(drv, REG_RBCPR_CTL); - seq_printf(s, "rbcpr_ctl = %#02X\n", ctl); - - irq_status = cpr_read(drv, REG_RBIF_IRQ_STATUS); - seq_printf(s, "rbcpr_irq_status = %#02X\n", irq_status); - - reg = cpr_read(drv, REG_RBCPR_RESULT_0); - seq_printf(s, "rbcpr_result_0 = %#02X\n", reg); - - step_dn = reg & 0x01; - step_up = (reg >> RBCPR_RESULT0_STEP_UP_SHIFT) & 0x01; - seq_printf(s, " [step_dn = %u", step_dn); - - seq_printf(s, ", step_up = %u", step_up); - - error_steps = (reg >> RBCPR_RESULT0_ERROR_STEPS_SHIFT) - & RBCPR_RESULT0_ERROR_STEPS_MASK; - seq_printf(s, ", error_steps = %u", error_steps); - - error = (reg >> RBCPR_RESULT0_ERROR_SHIFT) & RBCPR_RESULT0_ERROR_MASK; - seq_printf(s, ", error = %u", error); - - error_lt0 = (reg >> RBCPR_RESULT0_ERROR_LT0_SHIFT) & 0x01; - seq_printf(s, ", error_lt_0 = %u", error_lt0); - - busy = (reg >> RBCPR_RESULT0_BUSY_SHIFT) & 0x01; - seq_printf(s, ", busy = %u]\n", busy); - - return 0; -} -DEFINE_SHOW_ATTRIBUTE(cpr_debug_info); - -static void cpr_debugfs_init(struct cpr_drv *drv) -{ - drv->debugfs = debugfs_create_dir("qcom_cpr", NULL); - - debugfs_create_file("debug_info", 0444, drv->debugfs, - drv, &cpr_debug_info_fops); -} - -static int cpr_probe(struct platform_device *pdev) -{ - struct resource *res; - struct device *dev = &pdev->dev; - struct cpr_drv *drv; - int irq, ret; - const struct cpr_acc_desc *data; - struct device_node *np; - u32 cpr_rev = FUSE_REVISION_UNKNOWN; - - data = of_device_get_match_data(dev); - if (!data || !data->cpr_desc || !data->acc_desc) - return -EINVAL; - - drv = devm_kzalloc(dev, sizeof(*drv), GFP_KERNEL); - if (!drv) - return -ENOMEM; - drv->dev = dev; - drv->desc = data->cpr_desc; - drv->acc_desc = data->acc_desc; - - drv->fuse_corners = devm_kcalloc(dev, drv->desc->num_fuse_corners, - sizeof(*drv->fuse_corners), - GFP_KERNEL); - if (!drv->fuse_corners) - return -ENOMEM; - - np = of_parse_phandle(dev->of_node, "acc-syscon", 0); - if (!np) - return -ENODEV; - - drv->tcsr = syscon_node_to_regmap(np); - of_node_put(np); - if (IS_ERR(drv->tcsr)) - return PTR_ERR(drv->tcsr); - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - drv->base = devm_ioremap_resource(dev, res); - if (IS_ERR(drv->base)) - return PTR_ERR(drv->base); - - irq = platform_get_irq(pdev, 0); - if (irq < 0) - return -EINVAL; - - drv->vdd_apc = devm_regulator_get(dev, "vdd-apc"); - if (IS_ERR(drv->vdd_apc)) - return PTR_ERR(drv->vdd_apc); - - /* - * Initialize fuse corners, since it simply depends - * on data in efuses. - * Everything related to (virtual) corners has to be - * initialized after attaching to the power domain, - * since it depends on the CPU's OPP table. - */ - ret = cpr_read_efuse(dev, "cpr_fuse_revision", &cpr_rev); - if (ret) - return ret; - - drv->cpr_fuses = cpr_get_fuses(drv); - if (IS_ERR(drv->cpr_fuses)) - return PTR_ERR(drv->cpr_fuses); - - ret = cpr_populate_ring_osc_idx(drv); - if (ret) - return ret; - - ret = cpr_fuse_corner_init(drv); - if (ret) - return ret; - - mutex_init(&drv->lock); - - ret = devm_request_threaded_irq(dev, irq, NULL, - cpr_irq_handler, - IRQF_ONESHOT | IRQF_TRIGGER_RISING, - "cpr", drv); - if (ret) - return ret; - - drv->pd.name = devm_kstrdup_const(dev, dev->of_node->full_name, - GFP_KERNEL); - if (!drv->pd.name) - return -EINVAL; - - drv->pd.power_off = cpr_power_off; - drv->pd.power_on = cpr_power_on; - drv->pd.set_performance_state = cpr_set_performance_state; - drv->pd.opp_to_performance_state = cpr_get_performance_state; - drv->pd.attach_dev = cpr_pd_attach_dev; - - ret = pm_genpd_init(&drv->pd, NULL, true); - if (ret) - return ret; - - ret = of_genpd_add_provider_simple(dev->of_node, &drv->pd); - if (ret) - return ret; - - platform_set_drvdata(pdev, drv); - cpr_debugfs_init(drv); - - return 0; -} - -static int cpr_remove(struct platform_device *pdev) -{ - struct cpr_drv *drv = platform_get_drvdata(pdev); - - if (cpr_is_allowed(drv)) { - cpr_ctl_disable(drv); - cpr_irq_set(drv, 0); - } - - of_genpd_del_provider(pdev->dev.of_node); - pm_genpd_remove(&drv->pd); - - debugfs_remove_recursive(drv->debugfs); - - return 0; -} - -static const struct of_device_id cpr_match_table[] = { - { .compatible = "qcom,qcs404-cpr", .data = &qcs404_cpr_acc_desc }, - { } -}; -MODULE_DEVICE_TABLE(of, cpr_match_table); - -static struct platform_driver cpr_driver = { - .probe = cpr_probe, - .remove = cpr_remove, - .driver = { - .name = "qcom-cpr", - .of_match_table = cpr_match_table, - }, -}; -module_platform_driver(cpr_driver); - -MODULE_DESCRIPTION("Core Power Reduction (CPR) driver"); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/power/avs/rockchip-io-domain.c b/drivers/power/avs/rockchip-io-domain.c deleted file mode 100644 index eece97f97ef8..000000000000 --- a/drivers/power/avs/rockchip-io-domain.c +++ /dev/null @@ -1,630 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Rockchip IO Voltage Domain driver - * - * Copyright 2014 MundoReader S.L. - * Copyright 2014 Google, Inc. - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/err.h> -#include <linux/mfd/syscon.h> -#include <linux/of.h> -#include <linux/platform_device.h> -#include <linux/regmap.h> -#include <linux/regulator/consumer.h> - -#define MAX_SUPPLIES 16 - -/* - * The max voltage for 1.8V and 3.3V come from the Rockchip datasheet under - * "Recommended Operating Conditions" for "Digital GPIO". When the typical - * is 3.3V the max is 3.6V. When the typical is 1.8V the max is 1.98V. - * - * They are used like this: - * - If the voltage on a rail is above the "1.8" voltage (1.98V) we'll tell the - * SoC we're at 3.3. - * - If the voltage on a rail is above the "3.3" voltage (3.6V) we'll consider - * that to be an error. - */ -#define MAX_VOLTAGE_1_8 1980000 -#define MAX_VOLTAGE_3_3 3600000 - -#define PX30_IO_VSEL 0x180 -#define PX30_IO_VSEL_VCCIO6_SRC BIT(0) -#define PX30_IO_VSEL_VCCIO6_SUPPLY_NUM 1 - -#define RK3288_SOC_CON2 0x24c -#define RK3288_SOC_CON2_FLASH0 BIT(7) -#define RK3288_SOC_FLASH_SUPPLY_NUM 2 - -#define RK3328_SOC_CON4 0x410 -#define RK3328_SOC_CON4_VCCIO2 BIT(7) -#define RK3328_SOC_VCCIO2_SUPPLY_NUM 1 - -#define RK3368_SOC_CON15 0x43c -#define RK3368_SOC_CON15_FLASH0 BIT(14) -#define RK3368_SOC_FLASH_SUPPLY_NUM 2 - -#define RK3399_PMUGRF_CON0 0x180 -#define RK3399_PMUGRF_CON0_VSEL BIT(8) -#define RK3399_PMUGRF_VSEL_SUPPLY_NUM 9 - -struct rockchip_iodomain; - -/** - * @supplies: voltage settings matching the register bits. - */ -struct rockchip_iodomain_soc_data { - int grf_offset; - const char *supply_names[MAX_SUPPLIES]; - void (*init)(struct rockchip_iodomain *iod); -}; - -struct rockchip_iodomain_supply { - struct rockchip_iodomain *iod; - struct regulator *reg; - struct notifier_block nb; - int idx; -}; - -struct rockchip_iodomain { - struct device *dev; - struct regmap *grf; - const struct rockchip_iodomain_soc_data *soc_data; - struct rockchip_iodomain_supply supplies[MAX_SUPPLIES]; -}; - -static int rockchip_iodomain_write(struct rockchip_iodomain_supply *supply, - int uV) -{ - struct rockchip_iodomain *iod = supply->iod; - u32 val; - int ret; - - /* set value bit */ - val = (uV > MAX_VOLTAGE_1_8) ? 0 : 1; - val <<= supply->idx; - - /* apply hiword-mask */ - val |= (BIT(supply->idx) << 16); - - ret = regmap_write(iod->grf, iod->soc_data->grf_offset, val); - if (ret) - dev_err(iod->dev, "Couldn't write to GRF\n"); - - return ret; -} - -static int rockchip_iodomain_notify(struct notifier_block *nb, - unsigned long event, - void *data) -{ - struct rockchip_iodomain_supply *supply = - container_of(nb, struct rockchip_iodomain_supply, nb); - int uV; - int ret; - - /* - * According to Rockchip it's important to keep the SoC IO domain - * higher than (or equal to) the external voltage. That means we need - * to change it before external voltage changes happen in the case - * of an increase. - * - * Note that in the "pre" change we pick the max possible voltage that - * the regulator might end up at (the client requests a range and we - * don't know for certain the exact voltage). Right now we rely on the - * slop in MAX_VOLTAGE_1_8 and MAX_VOLTAGE_3_3 to save us if clients - * request something like a max of 3.6V when they really want 3.3V. - * We could attempt to come up with better rules if this fails. - */ - if (event & REGULATOR_EVENT_PRE_VOLTAGE_CHANGE) { - struct pre_voltage_change_data *pvc_data = data; - - uV = max_t(unsigned long, pvc_data->old_uV, pvc_data->max_uV); - } else if (event & (REGULATOR_EVENT_VOLTAGE_CHANGE | - REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE)) { - uV = (unsigned long)data; - } else { - return NOTIFY_OK; - } - - dev_dbg(supply->iod->dev, "Setting to %d\n", uV); - - if (uV > MAX_VOLTAGE_3_3) { - dev_err(supply->iod->dev, "Voltage too high: %d\n", uV); - - if (event == REGULATOR_EVENT_PRE_VOLTAGE_CHANGE) - return NOTIFY_BAD; - } - - ret = rockchip_iodomain_write(supply, uV); - if (ret && event == REGULATOR_EVENT_PRE_VOLTAGE_CHANGE) - return NOTIFY_BAD; - - dev_dbg(supply->iod->dev, "Setting to %d done\n", uV); - return NOTIFY_OK; -} - -static void px30_iodomain_init(struct rockchip_iodomain *iod) -{ - int ret; - u32 val; - - /* if no VCCIO6 supply we should leave things alone */ - if (!iod->supplies[PX30_IO_VSEL_VCCIO6_SUPPLY_NUM].reg) - return; - - /* - * set vccio6 iodomain to also use this framework - * instead of a special gpio. - */ - val = PX30_IO_VSEL_VCCIO6_SRC | (PX30_IO_VSEL_VCCIO6_SRC << 16); - ret = regmap_write(iod->grf, PX30_IO_VSEL, val); - if (ret < 0) - dev_warn(iod->dev, "couldn't update vccio6 ctrl\n"); -} - -static void rk3288_iodomain_init(struct rockchip_iodomain *iod) -{ - int ret; - u32 val; - - /* if no flash supply we should leave things alone */ - if (!iod->supplies[RK3288_SOC_FLASH_SUPPLY_NUM].reg) - return; - - /* - * set flash0 iodomain to also use this framework - * instead of a special gpio. - */ - val = RK3288_SOC_CON2_FLASH0 | (RK3288_SOC_CON2_FLASH0 << 16); - ret = regmap_write(iod->grf, RK3288_SOC_CON2, val); - if (ret < 0) - dev_warn(iod->dev, "couldn't update flash0 ctrl\n"); -} - -static void rk3328_iodomain_init(struct rockchip_iodomain *iod) -{ - int ret; - u32 val; - - /* if no vccio2 supply we should leave things alone */ - if (!iod->supplies[RK3328_SOC_VCCIO2_SUPPLY_NUM].reg) - return; - - /* - * set vccio2 iodomain to also use this framework - * instead of a special gpio. - */ - val = RK3328_SOC_CON4_VCCIO2 | (RK3328_SOC_CON4_VCCIO2 << 16); - ret = regmap_write(iod->grf, RK3328_SOC_CON4, val); - if (ret < 0) - dev_warn(iod->dev, "couldn't update vccio2 vsel ctrl\n"); -} - -static void rk3368_iodomain_init(struct rockchip_iodomain *iod) -{ - int ret; - u32 val; - - /* if no flash supply we should leave things alone */ - if (!iod->supplies[RK3368_SOC_FLASH_SUPPLY_NUM].reg) - return; - - /* - * set flash0 iodomain to also use this framework - * instead of a special gpio. - */ - val = RK3368_SOC_CON15_FLASH0 | (RK3368_SOC_CON15_FLASH0 << 16); - ret = regmap_write(iod->grf, RK3368_SOC_CON15, val); - if (ret < 0) - dev_warn(iod->dev, "couldn't update flash0 ctrl\n"); -} - -static void rk3399_pmu_iodomain_init(struct rockchip_iodomain *iod) -{ - int ret; - u32 val; - - /* if no pmu io supply we should leave things alone */ - if (!iod->supplies[RK3399_PMUGRF_VSEL_SUPPLY_NUM].reg) - return; - - /* - * set pmu io iodomain to also use this framework - * instead of a special gpio. - */ - val = RK3399_PMUGRF_CON0_VSEL | (RK3399_PMUGRF_CON0_VSEL << 16); - ret = regmap_write(iod->grf, RK3399_PMUGRF_CON0, val); - if (ret < 0) - dev_warn(iod->dev, "couldn't update pmu io iodomain ctrl\n"); -} - -static const struct rockchip_iodomain_soc_data soc_data_px30 = { - .grf_offset = 0x180, - .supply_names = { - NULL, - "vccio6", - "vccio1", - "vccio2", - "vccio3", - "vccio4", - "vccio5", - "vccio-oscgpi", - }, - .init = px30_iodomain_init, -}; - -static const struct rockchip_iodomain_soc_data soc_data_px30_pmu = { - .grf_offset = 0x100, - .supply_names = { - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - "pmuio1", - "pmuio2", - }, -}; - -/* - * On the rk3188 the io-domains are handled by a shared register with the - * lower 8 bits being still being continuing drive-strength settings. - */ -static const struct rockchip_iodomain_soc_data soc_data_rk3188 = { - .grf_offset = 0x104, - .supply_names = { - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - "ap0", - "ap1", - "cif", - "flash", - "vccio0", - "vccio1", - "lcdc0", - "lcdc1", - }, -}; - -static const struct rockchip_iodomain_soc_data soc_data_rk3228 = { - .grf_offset = 0x418, - .supply_names = { - "vccio1", - "vccio2", - "vccio3", - "vccio4", - }, -}; - -static const struct rockchip_iodomain_soc_data soc_data_rk3288 = { - .grf_offset = 0x380, - .supply_names = { - "lcdc", /* LCDC_VDD */ - "dvp", /* DVPIO_VDD */ - "flash0", /* FLASH0_VDD (emmc) */ - "flash1", /* FLASH1_VDD (sdio1) */ - "wifi", /* APIO3_VDD (sdio0) */ - "bb", /* APIO5_VDD */ - "audio", /* APIO4_VDD */ - "sdcard", /* SDMMC0_VDD (sdmmc) */ - "gpio30", /* APIO1_VDD */ - "gpio1830", /* APIO2_VDD */ - }, - .init = rk3288_iodomain_init, -}; - -static const struct rockchip_iodomain_soc_data soc_data_rk3328 = { - .grf_offset = 0x410, - .supply_names = { - "vccio1", - "vccio2", - "vccio3", - "vccio4", - "vccio5", - "vccio6", - "pmuio", - }, - .init = rk3328_iodomain_init, -}; - -static const struct rockchip_iodomain_soc_data soc_data_rk3368 = { - .grf_offset = 0x900, - .supply_names = { - NULL, /* reserved */ - "dvp", /* DVPIO_VDD */ - "flash0", /* FLASH0_VDD (emmc) */ - "wifi", /* APIO2_VDD (sdio0) */ - NULL, - "audio", /* APIO3_VDD */ - "sdcard", /* SDMMC0_VDD (sdmmc) */ - "gpio30", /* APIO1_VDD */ - "gpio1830", /* APIO4_VDD (gpujtag) */ - }, - .init = rk3368_iodomain_init, -}; - -static const struct rockchip_iodomain_soc_data soc_data_rk3368_pmu = { - .grf_offset = 0x100, - .supply_names = { - NULL, - NULL, - NULL, - NULL, - "pmu", /*PMU IO domain*/ - "vop", /*LCDC IO domain*/ - }, -}; - -static const struct rockchip_iodomain_soc_data soc_data_rk3399 = { - .grf_offset = 0xe640, - .supply_names = { - "bt656", /* APIO2_VDD */ - "audio", /* APIO5_VDD */ - "sdmmc", /* SDMMC0_VDD */ - "gpio1830", /* APIO4_VDD */ - }, -}; - -static const struct rockchip_iodomain_soc_data soc_data_rk3399_pmu = { - .grf_offset = 0x180, - .supply_names = { - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - "pmu1830", /* PMUIO2_VDD */ - }, - .init = rk3399_pmu_iodomain_init, -}; - -static const struct rockchip_iodomain_soc_data soc_data_rv1108 = { - .grf_offset = 0x404, - .supply_names = { - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - "vccio1", - "vccio2", - "vccio3", - "vccio5", - "vccio6", - }, - -}; - -static const struct rockchip_iodomain_soc_data soc_data_rv1108_pmu = { - .grf_offset = 0x104, - .supply_names = { - "pmu", - }, -}; - -static const struct of_device_id rockchip_iodomain_match[] = { - { - .compatible = "rockchip,px30-io-voltage-domain", - .data = (void *)&soc_data_px30 - }, - { - .compatible = "rockchip,px30-pmu-io-voltage-domain", - .data = (void *)&soc_data_px30_pmu - }, - { - .compatible = "rockchip,rk3188-io-voltage-domain", - .data = &soc_data_rk3188 - }, - { - .compatible = "rockchip,rk3228-io-voltage-domain", - .data = &soc_data_rk3228 - }, - { - .compatible = "rockchip,rk3288-io-voltage-domain", - .data = &soc_data_rk3288 - }, - { - .compatible = "rockchip,rk3328-io-voltage-domain", - .data = &soc_data_rk3328 - }, - { - .compatible = "rockchip,rk3368-io-voltage-domain", - .data = &soc_data_rk3368 - }, - { - .compatible = "rockchip,rk3368-pmu-io-voltage-domain", - .data = &soc_data_rk3368_pmu - }, - { - .compatible = "rockchip,rk3399-io-voltage-domain", - .data = &soc_data_rk3399 - }, - { - .compatible = "rockchip,rk3399-pmu-io-voltage-domain", - .data = &soc_data_rk3399_pmu - }, - { - .compatible = "rockchip,rv1108-io-voltage-domain", - .data = &soc_data_rv1108 - }, - { - .compatible = "rockchip,rv1108-pmu-io-voltage-domain", - .data = &soc_data_rv1108_pmu - }, - { /* sentinel */ }, -}; -MODULE_DEVICE_TABLE(of, rockchip_iodomain_match); - -static int rockchip_iodomain_probe(struct platform_device *pdev) -{ - struct device_node *np = pdev->dev.of_node; - const struct of_device_id *match; - struct rockchip_iodomain *iod; - struct device *parent; - int i, ret = 0; - - if (!np) - return -ENODEV; - - iod = devm_kzalloc(&pdev->dev, sizeof(*iod), GFP_KERNEL); - if (!iod) - return -ENOMEM; - - iod->dev = &pdev->dev; - platform_set_drvdata(pdev, iod); - - match = of_match_node(rockchip_iodomain_match, np); - iod->soc_data = match->data; - - parent = pdev->dev.parent; - if (parent && parent->of_node) { - iod->grf = syscon_node_to_regmap(parent->of_node); - } else { - dev_dbg(&pdev->dev, "falling back to old binding\n"); - iod->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf"); - } - - if (IS_ERR(iod->grf)) { - dev_err(&pdev->dev, "couldn't find grf regmap\n"); - return PTR_ERR(iod->grf); - } - - for (i = 0; i < MAX_SUPPLIES; i++) { - const char *supply_name = iod->soc_data->supply_names[i]; - struct rockchip_iodomain_supply *supply = &iod->supplies[i]; - struct regulator *reg; - int uV; - - if (!supply_name) - continue; - - reg = devm_regulator_get_optional(iod->dev, supply_name); - if (IS_ERR(reg)) { - ret = PTR_ERR(reg); - - /* If a supply wasn't specified, that's OK */ - if (ret == -ENODEV) - continue; - else if (ret != -EPROBE_DEFER) - dev_err(iod->dev, "couldn't get regulator %s\n", - supply_name); - goto unreg_notify; - } - - /* set initial correct value */ - uV = regulator_get_voltage(reg); - - /* must be a regulator we can get the voltage of */ - if (uV < 0) { - dev_err(iod->dev, "Can't determine voltage: %s\n", - supply_name); - goto unreg_notify; - } - - if (uV > MAX_VOLTAGE_3_3) { - dev_crit(iod->dev, - "%d uV is too high. May damage SoC!\n", - uV); - ret = -EINVAL; - goto unreg_notify; - } - - /* setup our supply */ - supply->idx = i; - supply->iod = iod; - supply->reg = reg; - supply->nb.notifier_call = rockchip_iodomain_notify; - - ret = rockchip_iodomain_write(supply, uV); - if (ret) { - supply->reg = NULL; - goto unreg_notify; - } - - /* register regulator notifier */ - ret = regulator_register_notifier(reg, &supply->nb); - if (ret) { - dev_err(&pdev->dev, - "regulator notifier request failed\n"); - supply->reg = NULL; - goto unreg_notify; - } - } - - if (iod->soc_data->init) - iod->soc_data->init(iod); - - return 0; - -unreg_notify: - for (i = MAX_SUPPLIES - 1; i >= 0; i--) { - struct rockchip_iodomain_supply *io_supply = &iod->supplies[i]; - - if (io_supply->reg) - regulator_unregister_notifier(io_supply->reg, - &io_supply->nb); - } - - return ret; -} - -static int rockchip_iodomain_remove(struct platform_device *pdev) -{ - struct rockchip_iodomain *iod = platform_get_drvdata(pdev); - int i; - - for (i = MAX_SUPPLIES - 1; i >= 0; i--) { - struct rockchip_iodomain_supply *io_supply = &iod->supplies[i]; - - if (io_supply->reg) - regulator_unregister_notifier(io_supply->reg, - &io_supply->nb); - } - - return 0; -} - -static struct platform_driver rockchip_iodomain_driver = { - .probe = rockchip_iodomain_probe, - .remove = rockchip_iodomain_remove, - .driver = { - .name = "rockchip-iodomain", - .of_match_table = rockchip_iodomain_match, - }, -}; - -module_platform_driver(rockchip_iodomain_driver); - -MODULE_DESCRIPTION("Rockchip IO-domain driver"); -MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>"); -MODULE_AUTHOR("Doug Anderson <dianders@chromium.org>"); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/power/avs/smartreflex.c b/drivers/power/avs/smartreflex.c deleted file mode 100644 index 5376f3d22f31..000000000000 --- a/drivers/power/avs/smartreflex.c +++ /dev/null @@ -1,1045 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * OMAP SmartReflex Voltage Control - * - * Author: Thara Gopinath <thara@ti.com> - * - * Copyright (C) 2012 Texas Instruments, Inc. - * Thara Gopinath <thara@ti.com> - * - * Copyright (C) 2008 Nokia Corporation - * Kalle Jokiniemi - * - * Copyright (C) 2007 Texas Instruments, Inc. - * Lesly A M <x0080970@ti.com> - */ - -#include <linux/module.h> -#include <linux/mod_devicetable.h> -#include <linux/interrupt.h> -#include <linux/clk.h> -#include <linux/io.h> -#include <linux/debugfs.h> -#include <linux/delay.h> -#include <linux/slab.h> -#include <linux/pm_runtime.h> -#include <linux/power/smartreflex.h> - -#define DRIVER_NAME "smartreflex" -#define SMARTREFLEX_NAME_LEN 32 -#define NVALUE_NAME_LEN 40 -#define SR_DISABLE_TIMEOUT 200 - -/* sr_list contains all the instances of smartreflex module */ -static LIST_HEAD(sr_list); - -static struct omap_sr_class_data *sr_class; -static struct dentry *sr_dbg_dir; - -static inline void sr_write_reg(struct omap_sr *sr, unsigned offset, u32 value) -{ - __raw_writel(value, (sr->base + offset)); -} - -static inline void sr_modify_reg(struct omap_sr *sr, unsigned offset, u32 mask, - u32 value) -{ - u32 reg_val; - - /* - * Smartreflex error config register is special as it contains - * certain status bits which if written a 1 into means a clear - * of those bits. So in order to make sure no accidental write of - * 1 happens to those status bits, do a clear of them in the read - * value. This mean this API doesn't rewrite values in these bits - * if they are currently set, but does allow the caller to write - * those bits. - */ - if (sr->ip_type == SR_TYPE_V1 && offset == ERRCONFIG_V1) - mask |= ERRCONFIG_STATUS_V1_MASK; - else if (sr->ip_type == SR_TYPE_V2 && offset == ERRCONFIG_V2) - mask |= ERRCONFIG_VPBOUNDINTST_V2; - - reg_val = __raw_readl(sr->base + offset); - reg_val &= ~mask; - - value &= mask; - - reg_val |= value; - - __raw_writel(reg_val, (sr->base + offset)); -} - -static inline u32 sr_read_reg(struct omap_sr *sr, unsigned offset) -{ - return __raw_readl(sr->base + offset); -} - -static struct omap_sr *_sr_lookup(struct voltagedomain *voltdm) -{ - struct omap_sr *sr_info; - - if (!voltdm) { - pr_err("%s: Null voltage domain passed!\n", __func__); - return ERR_PTR(-EINVAL); - } - - list_for_each_entry(sr_info, &sr_list, node) { - if (voltdm == sr_info->voltdm) - return sr_info; - } - - return ERR_PTR(-ENODATA); -} - -static irqreturn_t sr_interrupt(int irq, void *data) -{ - struct omap_sr *sr_info = data; - u32 status = 0; - - switch (sr_info->ip_type) { - case SR_TYPE_V1: - /* Read the status bits */ - status = sr_read_reg(sr_info, ERRCONFIG_V1); - - /* Clear them by writing back */ - sr_write_reg(sr_info, ERRCONFIG_V1, status); - break; - case SR_TYPE_V2: - /* Read the status bits */ - status = sr_read_reg(sr_info, IRQSTATUS); - - /* Clear them by writing back */ - sr_write_reg(sr_info, IRQSTATUS, status); - break; - default: - dev_err(&sr_info->pdev->dev, "UNKNOWN IP type %d\n", - sr_info->ip_type); - return IRQ_NONE; - } - - if (sr_class->notify) - sr_class->notify(sr_info, status); - - return IRQ_HANDLED; -} - -static void sr_set_clk_length(struct omap_sr *sr) -{ - struct clk *fck; - u32 fclk_speed; - - /* Try interconnect target module fck first if it already exists */ - fck = clk_get(sr->pdev->dev.parent, "fck"); - if (IS_ERR(fck)) { - fck = clk_get(&sr->pdev->dev, "fck"); - if (IS_ERR(fck)) { - dev_err(&sr->pdev->dev, - "%s: unable to get fck for device %s\n", - __func__, dev_name(&sr->pdev->dev)); - return; - } - } - - fclk_speed = clk_get_rate(fck); - clk_put(fck); - - switch (fclk_speed) { - case 12000000: - sr->clk_length = SRCLKLENGTH_12MHZ_SYSCLK; - break; - case 13000000: - sr->clk_length = SRCLKLENGTH_13MHZ_SYSCLK; - break; - case 19200000: - sr->clk_length = SRCLKLENGTH_19MHZ_SYSCLK; - break; - case 26000000: - sr->clk_length = SRCLKLENGTH_26MHZ_SYSCLK; - break; - case 38400000: - sr->clk_length = SRCLKLENGTH_38MHZ_SYSCLK; - break; - default: - dev_err(&sr->pdev->dev, "%s: Invalid fclk rate: %d\n", - __func__, fclk_speed); - break; - } -} - -static void sr_start_vddautocomp(struct omap_sr *sr) -{ - if (!sr_class || !(sr_class->enable) || !(sr_class->configure)) { - dev_warn(&sr->pdev->dev, - "%s: smartreflex class driver not registered\n", - __func__); - return; - } - - if (!sr_class->enable(sr)) - sr->autocomp_active = true; -} - -static void sr_stop_vddautocomp(struct omap_sr *sr) -{ - if (!sr_class || !(sr_class->disable)) { - dev_warn(&sr->pdev->dev, - "%s: smartreflex class driver not registered\n", - __func__); - return; - } - - if (sr->autocomp_active) { - sr_class->disable(sr, 1); - sr->autocomp_active = false; - } -} - -/* - * This function handles the initializations which have to be done - * only when both sr device and class driver regiter has - * completed. This will be attempted to be called from both sr class - * driver register and sr device intializtion API's. Only one call - * will ultimately succeed. - * - * Currently this function registers interrupt handler for a particular SR - * if smartreflex class driver is already registered and has - * requested for interrupts and the SR interrupt line in present. - */ -static int sr_late_init(struct omap_sr *sr_info) -{ - struct omap_sr_data *pdata = sr_info->pdev->dev.platform_data; - int ret = 0; - - if (sr_class->notify && sr_class->notify_flags && sr_info->irq) { - ret = devm_request_irq(&sr_info->pdev->dev, sr_info->irq, - sr_interrupt, 0, sr_info->name, sr_info); - if (ret) - goto error; - disable_irq(sr_info->irq); - } - - if (pdata && pdata->enable_on_init) - sr_start_vddautocomp(sr_info); - - return ret; - -error: - list_del(&sr_info->node); - dev_err(&sr_info->pdev->dev, "%s: ERROR in registering interrupt handler. Smartreflex will not function as desired\n", - __func__); - - return ret; -} - -static void sr_v1_disable(struct omap_sr *sr) -{ - int timeout = 0; - int errconf_val = ERRCONFIG_MCUACCUMINTST | ERRCONFIG_MCUVALIDINTST | - ERRCONFIG_MCUBOUNDINTST; - - /* Enable MCUDisableAcknowledge interrupt */ - sr_modify_reg(sr, ERRCONFIG_V1, - ERRCONFIG_MCUDISACKINTEN, ERRCONFIG_MCUDISACKINTEN); - - /* SRCONFIG - disable SR */ - sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, 0x0); - - /* Disable all other SR interrupts and clear the status as needed */ - if (sr_read_reg(sr, ERRCONFIG_V1) & ERRCONFIG_VPBOUNDINTST_V1) - errconf_val |= ERRCONFIG_VPBOUNDINTST_V1; - sr_modify_reg(sr, ERRCONFIG_V1, - (ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUVALIDINTEN | - ERRCONFIG_MCUBOUNDINTEN | ERRCONFIG_VPBOUNDINTEN_V1), - errconf_val); - - /* - * Wait for SR to be disabled. - * wait until ERRCONFIG.MCUDISACKINTST = 1. Typical latency is 1us. - */ - sr_test_cond_timeout((sr_read_reg(sr, ERRCONFIG_V1) & - ERRCONFIG_MCUDISACKINTST), SR_DISABLE_TIMEOUT, - timeout); - - if (timeout >= SR_DISABLE_TIMEOUT) - dev_warn(&sr->pdev->dev, "%s: Smartreflex disable timedout\n", - __func__); - - /* Disable MCUDisableAcknowledge interrupt & clear pending interrupt */ - sr_modify_reg(sr, ERRCONFIG_V1, ERRCONFIG_MCUDISACKINTEN, - ERRCONFIG_MCUDISACKINTST); -} - -static void sr_v2_disable(struct omap_sr *sr) -{ - int timeout = 0; - - /* Enable MCUDisableAcknowledge interrupt */ - sr_write_reg(sr, IRQENABLE_SET, IRQENABLE_MCUDISABLEACKINT); - - /* SRCONFIG - disable SR */ - sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, 0x0); - - /* - * Disable all other SR interrupts and clear the status - * write to status register ONLY on need basis - only if status - * is set. - */ - if (sr_read_reg(sr, ERRCONFIG_V2) & ERRCONFIG_VPBOUNDINTST_V2) - sr_modify_reg(sr, ERRCONFIG_V2, ERRCONFIG_VPBOUNDINTEN_V2, - ERRCONFIG_VPBOUNDINTST_V2); - else - sr_modify_reg(sr, ERRCONFIG_V2, ERRCONFIG_VPBOUNDINTEN_V2, - 0x0); - sr_write_reg(sr, IRQENABLE_CLR, (IRQENABLE_MCUACCUMINT | - IRQENABLE_MCUVALIDINT | - IRQENABLE_MCUBOUNDSINT)); - sr_write_reg(sr, IRQSTATUS, (IRQSTATUS_MCUACCUMINT | - IRQSTATUS_MCVALIDINT | - IRQSTATUS_MCBOUNDSINT)); - - /* - * Wait for SR to be disabled. - * wait until IRQSTATUS.MCUDISACKINTST = 1. Typical latency is 1us. - */ - sr_test_cond_timeout((sr_read_reg(sr, IRQSTATUS) & - IRQSTATUS_MCUDISABLEACKINT), SR_DISABLE_TIMEOUT, - timeout); - - if (timeout >= SR_DISABLE_TIMEOUT) - dev_warn(&sr->pdev->dev, "%s: Smartreflex disable timedout\n", - __func__); - - /* Disable MCUDisableAcknowledge interrupt & clear pending interrupt */ - sr_write_reg(sr, IRQENABLE_CLR, IRQENABLE_MCUDISABLEACKINT); - sr_write_reg(sr, IRQSTATUS, IRQSTATUS_MCUDISABLEACKINT); -} - -static struct omap_sr_nvalue_table *sr_retrieve_nvalue_row( - struct omap_sr *sr, u32 efuse_offs) -{ - int i; - - if (!sr->nvalue_table) { - dev_warn(&sr->pdev->dev, "%s: Missing ntarget value table\n", - __func__); - return NULL; - } - - for (i = 0; i < sr->nvalue_count; i++) { - if (sr->nvalue_table[i].efuse_offs == efuse_offs) - return &sr->nvalue_table[i]; - } - - return NULL; -} - -/* Public Functions */ - -/** - * sr_configure_errgen() - Configures the SmartReflex to perform AVS using the - * error generator module. - * @sr: SR module to be configured. - * - * This API is to be called from the smartreflex class driver to - * configure the error generator module inside the smartreflex module. - * SR settings if using the ERROR module inside Smartreflex. - * SR CLASS 3 by default uses only the ERROR module where as - * SR CLASS 2 can choose between ERROR module and MINMAXAVG - * module. Returns 0 on success and error value in case of failure. - */ -int sr_configure_errgen(struct omap_sr *sr) -{ - u32 sr_config, sr_errconfig, errconfig_offs; - u32 vpboundint_en, vpboundint_st; - u32 senp_en = 0, senn_en = 0; - u8 senp_shift, senn_shift; - - if (!sr) { - pr_warn("%s: NULL omap_sr from %pS\n", - __func__, (void *)_RET_IP_); - return -EINVAL; - } - - if (!sr->clk_length) - sr_set_clk_length(sr); - - senp_en = sr->senp_mod; - senn_en = sr->senn_mod; - - sr_config = (sr->clk_length << SRCONFIG_SRCLKLENGTH_SHIFT) | - SRCONFIG_SENENABLE | SRCONFIG_ERRGEN_EN; - - switch (sr->ip_type) { - case SR_TYPE_V1: - sr_config |= SRCONFIG_DELAYCTRL; - senn_shift = SRCONFIG_SENNENABLE_V1_SHIFT; - senp_shift = SRCONFIG_SENPENABLE_V1_SHIFT; - errconfig_offs = ERRCONFIG_V1; - vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V1; - vpboundint_st = ERRCONFIG_VPBOUNDINTST_V1; - break; - case SR_TYPE_V2: - senn_shift = SRCONFIG_SENNENABLE_V2_SHIFT; - senp_shift = SRCONFIG_SENPENABLE_V2_SHIFT; - errconfig_offs = ERRCONFIG_V2; - vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V2; - vpboundint_st = ERRCONFIG_VPBOUNDINTST_V2; - break; - default: - dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex module without specifying the ip\n", - __func__); - return -EINVAL; - } - - sr_config |= ((senn_en << senn_shift) | (senp_en << senp_shift)); - sr_write_reg(sr, SRCONFIG, sr_config); - sr_errconfig = (sr->err_weight << ERRCONFIG_ERRWEIGHT_SHIFT) | - (sr->err_maxlimit << ERRCONFIG_ERRMAXLIMIT_SHIFT) | - (sr->err_minlimit << ERRCONFIG_ERRMINLIMIT_SHIFT); - sr_modify_reg(sr, errconfig_offs, (SR_ERRWEIGHT_MASK | - SR_ERRMAXLIMIT_MASK | SR_ERRMINLIMIT_MASK), - sr_errconfig); - - /* Enabling the interrupts if the ERROR module is used */ - sr_modify_reg(sr, errconfig_offs, (vpboundint_en | vpboundint_st), - vpboundint_en); - - return 0; -} - -/** - * sr_disable_errgen() - Disables SmartReflex AVS module's errgen component - * @sr: SR module to be configured. - * - * This API is to be called from the smartreflex class driver to - * disable the error generator module inside the smartreflex module. - * - * Returns 0 on success and error value in case of failure. - */ -int sr_disable_errgen(struct omap_sr *sr) -{ - u32 errconfig_offs; - u32 vpboundint_en, vpboundint_st; - - if (!sr) { - pr_warn("%s: NULL omap_sr from %pS\n", - __func__, (void *)_RET_IP_); - return -EINVAL; - } - - switch (sr->ip_type) { - case SR_TYPE_V1: - errconfig_offs = ERRCONFIG_V1; - vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V1; - vpboundint_st = ERRCONFIG_VPBOUNDINTST_V1; - break; - case SR_TYPE_V2: - errconfig_offs = ERRCONFIG_V2; - vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V2; - vpboundint_st = ERRCONFIG_VPBOUNDINTST_V2; - break; - default: - dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex module without specifying the ip\n", - __func__); - return -EINVAL; - } - - /* Disable the Sensor and errorgen */ - sr_modify_reg(sr, SRCONFIG, SRCONFIG_SENENABLE | SRCONFIG_ERRGEN_EN, 0); - - /* - * Disable the interrupts of ERROR module - * NOTE: modify is a read, modify,write - an implicit OCP barrier - * which is required is present here - sequencing is critical - * at this point (after errgen is disabled, vpboundint disable) - */ - sr_modify_reg(sr, errconfig_offs, vpboundint_en | vpboundint_st, 0); - - return 0; -} - -/** - * sr_configure_minmax() - Configures the SmartReflex to perform AVS using the - * minmaxavg module. - * @sr: SR module to be configured. - * - * This API is to be called from the smartreflex class driver to - * configure the minmaxavg module inside the smartreflex module. - * SR settings if using the ERROR module inside Smartreflex. - * SR CLASS 3 by default uses only the ERROR module where as - * SR CLASS 2 can choose between ERROR module and MINMAXAVG - * module. Returns 0 on success and error value in case of failure. - */ -int sr_configure_minmax(struct omap_sr *sr) -{ - u32 sr_config, sr_avgwt; - u32 senp_en = 0, senn_en = 0; - u8 senp_shift, senn_shift; - - if (!sr) { - pr_warn("%s: NULL omap_sr from %pS\n", - __func__, (void *)_RET_IP_); - return -EINVAL; - } - - if (!sr->clk_length) - sr_set_clk_length(sr); - - senp_en = sr->senp_mod; - senn_en = sr->senn_mod; - - sr_config = (sr->clk_length << SRCONFIG_SRCLKLENGTH_SHIFT) | - SRCONFIG_SENENABLE | - (sr->accum_data << SRCONFIG_ACCUMDATA_SHIFT); - - switch (sr->ip_type) { - case SR_TYPE_V1: - sr_config |= SRCONFIG_DELAYCTRL; - senn_shift = SRCONFIG_SENNENABLE_V1_SHIFT; - senp_shift = SRCONFIG_SENPENABLE_V1_SHIFT; - break; - case SR_TYPE_V2: - senn_shift = SRCONFIG_SENNENABLE_V2_SHIFT; - senp_shift = SRCONFIG_SENPENABLE_V2_SHIFT; - break; - default: - dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex module without specifying the ip\n", - __func__); - return -EINVAL; - } - - sr_config |= ((senn_en << senn_shift) | (senp_en << senp_shift)); - sr_write_reg(sr, SRCONFIG, sr_config); - sr_avgwt = (sr->senp_avgweight << AVGWEIGHT_SENPAVGWEIGHT_SHIFT) | - (sr->senn_avgweight << AVGWEIGHT_SENNAVGWEIGHT_SHIFT); - sr_write_reg(sr, AVGWEIGHT, sr_avgwt); - - /* - * Enabling the interrupts if MINMAXAVG module is used. - * TODO: check if all the interrupts are mandatory - */ - switch (sr->ip_type) { - case SR_TYPE_V1: - sr_modify_reg(sr, ERRCONFIG_V1, - (ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUVALIDINTEN | - ERRCONFIG_MCUBOUNDINTEN), - (ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUACCUMINTST | - ERRCONFIG_MCUVALIDINTEN | ERRCONFIG_MCUVALIDINTST | - ERRCONFIG_MCUBOUNDINTEN | ERRCONFIG_MCUBOUNDINTST)); - break; - case SR_TYPE_V2: - sr_write_reg(sr, IRQSTATUS, - IRQSTATUS_MCUACCUMINT | IRQSTATUS_MCVALIDINT | - IRQSTATUS_MCBOUNDSINT | IRQSTATUS_MCUDISABLEACKINT); - sr_write_reg(sr, IRQENABLE_SET, - IRQENABLE_MCUACCUMINT | IRQENABLE_MCUVALIDINT | - IRQENABLE_MCUBOUNDSINT | IRQENABLE_MCUDISABLEACKINT); - break; - default: - dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex module without specifying the ip\n", - __func__); - return -EINVAL; - } - - return 0; -} - -/** - * sr_enable() - Enables the smartreflex module. - * @sr: pointer to which the SR module to be configured belongs to. - * @volt: The voltage at which the Voltage domain associated with - * the smartreflex module is operating at. - * This is required only to program the correct Ntarget value. - * - * This API is to be called from the smartreflex class driver to - * enable a smartreflex module. Returns 0 on success. Returns error - * value if the voltage passed is wrong or if ntarget value is wrong. - */ -int sr_enable(struct omap_sr *sr, unsigned long volt) -{ - struct omap_volt_data *volt_data; - struct omap_sr_nvalue_table *nvalue_row; - int ret; - - if (!sr) { - pr_warn("%s: NULL omap_sr from %pS\n", - __func__, (void *)_RET_IP_); - return -EINVAL; - } - - volt_data = omap_voltage_get_voltdata(sr->voltdm, volt); - - if (IS_ERR(volt_data)) { - dev_warn(&sr->pdev->dev, "%s: Unable to get voltage table for nominal voltage %ld\n", - __func__, volt); - return PTR_ERR(volt_data); - } - - nvalue_row = sr_retrieve_nvalue_row(sr, volt_data->sr_efuse_offs); - - if (!nvalue_row) { - dev_warn(&sr->pdev->dev, "%s: failure getting SR data for this voltage %ld\n", - __func__, volt); - return -ENODATA; - } - - /* errminlimit is opp dependent and hence linked to voltage */ - sr->err_minlimit = nvalue_row->errminlimit; - - pm_runtime_get_sync(&sr->pdev->dev); - - /* Check if SR is already enabled. If yes do nothing */ - if (sr_read_reg(sr, SRCONFIG) & SRCONFIG_SRENABLE) - return 0; - - /* Configure SR */ - ret = sr_class->configure(sr); - if (ret) - return ret; - - sr_write_reg(sr, NVALUERECIPROCAL, nvalue_row->nvalue); - - /* SRCONFIG - enable SR */ - sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, SRCONFIG_SRENABLE); - return 0; -} - -/** - * sr_disable() - Disables the smartreflex module. - * @sr: pointer to which the SR module to be configured belongs to. - * - * This API is to be called from the smartreflex class driver to - * disable a smartreflex module. - */ -void sr_disable(struct omap_sr *sr) -{ - if (!sr) { - pr_warn("%s: NULL omap_sr from %pS\n", - __func__, (void *)_RET_IP_); - return; - } - - /* Check if SR clocks are already disabled. If yes do nothing */ - if (pm_runtime_suspended(&sr->pdev->dev)) - return; - - /* - * Disable SR if only it is indeed enabled. Else just - * disable the clocks. - */ - if (sr_read_reg(sr, SRCONFIG) & SRCONFIG_SRENABLE) { - switch (sr->ip_type) { - case SR_TYPE_V1: - sr_v1_disable(sr); - break; - case SR_TYPE_V2: - sr_v2_disable(sr); - break; - default: - dev_err(&sr->pdev->dev, "UNKNOWN IP type %d\n", - sr->ip_type); - } - } - - pm_runtime_put_sync_suspend(&sr->pdev->dev); -} - -/** - * sr_register_class() - API to register a smartreflex class parameters. - * @class_data: The structure containing various sr class specific data. - * - * This API is to be called by the smartreflex class driver to register itself - * with the smartreflex driver during init. Returns 0 on success else the - * error value. - */ -int sr_register_class(struct omap_sr_class_data *class_data) -{ - struct omap_sr *sr_info; - - if (!class_data) { - pr_warn("%s:, Smartreflex class data passed is NULL\n", - __func__); - return -EINVAL; - } - - if (sr_class) { - pr_warn("%s: Smartreflex class driver already registered\n", - __func__); - return -EBUSY; - } - - sr_class = class_data; - - /* - * Call into late init to do initializations that require - * both sr driver and sr class driver to be initiallized. - */ - list_for_each_entry(sr_info, &sr_list, node) - sr_late_init(sr_info); - - return 0; -} - -/** - * omap_sr_enable() - API to enable SR clocks and to call into the - * registered smartreflex class enable API. - * @voltdm: VDD pointer to which the SR module to be configured belongs to. - * - * This API is to be called from the kernel in order to enable - * a particular smartreflex module. This API will do the initial - * configurations to turn on the smartreflex module and in turn call - * into the registered smartreflex class enable API. - */ -void omap_sr_enable(struct voltagedomain *voltdm) -{ - struct omap_sr *sr = _sr_lookup(voltdm); - - if (IS_ERR(sr)) { - pr_warn("%s: omap_sr struct for voltdm not found\n", __func__); - return; - } - - if (!sr->autocomp_active) - return; - - if (!sr_class || !(sr_class->enable) || !(sr_class->configure)) { - dev_warn(&sr->pdev->dev, "%s: smartreflex class driver not registered\n", - __func__); - return; - } - - sr_class->enable(sr); -} - -/** - * omap_sr_disable() - API to disable SR without resetting the voltage - * processor voltage - * @voltdm: VDD pointer to which the SR module to be configured belongs to. - * - * This API is to be called from the kernel in order to disable - * a particular smartreflex module. This API will in turn call - * into the registered smartreflex class disable API. This API will tell - * the smartreflex class disable not to reset the VP voltage after - * disabling smartreflex. - */ -void omap_sr_disable(struct voltagedomain *voltdm) -{ - struct omap_sr *sr = _sr_lookup(voltdm); - - if (IS_ERR(sr)) { - pr_warn("%s: omap_sr struct for voltdm not found\n", __func__); - return; - } - - if (!sr->autocomp_active) - return; - - if (!sr_class || !(sr_class->disable)) { - dev_warn(&sr->pdev->dev, "%s: smartreflex class driver not registered\n", - __func__); - return; - } - - sr_class->disable(sr, 0); -} - -/** - * omap_sr_disable_reset_volt() - API to disable SR and reset the - * voltage processor voltage - * @voltdm: VDD pointer to which the SR module to be configured belongs to. - * - * This API is to be called from the kernel in order to disable - * a particular smartreflex module. This API will in turn call - * into the registered smartreflex class disable API. This API will tell - * the smartreflex class disable to reset the VP voltage after - * disabling smartreflex. - */ -void omap_sr_disable_reset_volt(struct voltagedomain *voltdm) -{ - struct omap_sr *sr = _sr_lookup(voltdm); - - if (IS_ERR(sr)) { - pr_warn("%s: omap_sr struct for voltdm not found\n", __func__); - return; - } - - if (!sr->autocomp_active) - return; - - if (!sr_class || !(sr_class->disable)) { - dev_warn(&sr->pdev->dev, "%s: smartreflex class driver not registered\n", - __func__); - return; - } - - sr_class->disable(sr, 1); -} - -/* PM Debug FS entries to enable and disable smartreflex. */ -static int omap_sr_autocomp_show(void *data, u64 *val) -{ - struct omap_sr *sr_info = data; - - if (!sr_info) { - pr_warn("%s: omap_sr struct not found\n", __func__); - return -EINVAL; - } - - *val = sr_info->autocomp_active; - - return 0; -} - -static int omap_sr_autocomp_store(void *data, u64 val) -{ - struct omap_sr *sr_info = data; - - if (!sr_info) { - pr_warn("%s: omap_sr struct not found\n", __func__); - return -EINVAL; - } - - /* Sanity check */ - if (val > 1) { - pr_warn("%s: Invalid argument %lld\n", __func__, val); - return -EINVAL; - } - - /* control enable/disable only if there is a delta in value */ - if (sr_info->autocomp_active != val) { - if (!val) - sr_stop_vddautocomp(sr_info); - else - sr_start_vddautocomp(sr_info); - } - - return 0; -} - -DEFINE_SIMPLE_ATTRIBUTE(pm_sr_fops, omap_sr_autocomp_show, - omap_sr_autocomp_store, "%llu\n"); - -static int omap_sr_probe(struct platform_device *pdev) -{ - struct omap_sr *sr_info; - struct omap_sr_data *pdata = pdev->dev.platform_data; - struct resource *mem, *irq; - struct dentry *nvalue_dir; - int i, ret = 0; - - sr_info = devm_kzalloc(&pdev->dev, sizeof(struct omap_sr), GFP_KERNEL); - if (!sr_info) - return -ENOMEM; - - sr_info->name = devm_kzalloc(&pdev->dev, - SMARTREFLEX_NAME_LEN, GFP_KERNEL); - if (!sr_info->name) - return -ENOMEM; - - platform_set_drvdata(pdev, sr_info); - - if (!pdata) { - dev_err(&pdev->dev, "%s: platform data missing\n", __func__); - return -EINVAL; - } - - mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - sr_info->base = devm_ioremap_resource(&pdev->dev, mem); - if (IS_ERR(sr_info->base)) { - dev_err(&pdev->dev, "%s: ioremap fail\n", __func__); - return PTR_ERR(sr_info->base); - } - - irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - - pm_runtime_enable(&pdev->dev); - pm_runtime_irq_safe(&pdev->dev); - - snprintf(sr_info->name, SMARTREFLEX_NAME_LEN, "%s", pdata->name); - - sr_info->pdev = pdev; - sr_info->srid = pdev->id; - sr_info->voltdm = pdata->voltdm; - sr_info->nvalue_table = pdata->nvalue_table; - sr_info->nvalue_count = pdata->nvalue_count; - sr_info->senn_mod = pdata->senn_mod; - sr_info->senp_mod = pdata->senp_mod; - sr_info->err_weight = pdata->err_weight; - sr_info->err_maxlimit = pdata->err_maxlimit; - sr_info->accum_data = pdata->accum_data; - sr_info->senn_avgweight = pdata->senn_avgweight; - sr_info->senp_avgweight = pdata->senp_avgweight; - sr_info->autocomp_active = false; - sr_info->ip_type = pdata->ip_type; - - if (irq) - sr_info->irq = irq->start; - - sr_set_clk_length(sr_info); - - list_add(&sr_info->node, &sr_list); - - ret = pm_runtime_get_sync(&pdev->dev); - if (ret < 0) { - pm_runtime_put_noidle(&pdev->dev); - goto err_list_del; - } - - /* - * Call into late init to do initializations that require - * both sr driver and sr class driver to be initiallized. - */ - if (sr_class) { - ret = sr_late_init(sr_info); - if (ret) { - pr_warn("%s: Error in SR late init\n", __func__); - goto err_list_del; - } - } - - dev_info(&pdev->dev, "%s: SmartReflex driver initialized\n", __func__); - if (!sr_dbg_dir) - sr_dbg_dir = debugfs_create_dir("smartreflex", NULL); - - sr_info->dbg_dir = debugfs_create_dir(sr_info->name, sr_dbg_dir); - - debugfs_create_file("autocomp", S_IRUGO | S_IWUSR, sr_info->dbg_dir, - sr_info, &pm_sr_fops); - debugfs_create_x32("errweight", S_IRUGO, sr_info->dbg_dir, - &sr_info->err_weight); - debugfs_create_x32("errmaxlimit", S_IRUGO, sr_info->dbg_dir, - &sr_info->err_maxlimit); - - nvalue_dir = debugfs_create_dir("nvalue", sr_info->dbg_dir); - - if (sr_info->nvalue_count == 0 || !sr_info->nvalue_table) { - dev_warn(&pdev->dev, "%s: %s: No Voltage table for the corresponding vdd. Cannot create debugfs entries for n-values\n", - __func__, sr_info->name); - - ret = -ENODATA; - goto err_debugfs; - } - - for (i = 0; i < sr_info->nvalue_count; i++) { - char name[NVALUE_NAME_LEN + 1]; - - snprintf(name, sizeof(name), "volt_%lu", - sr_info->nvalue_table[i].volt_nominal); - debugfs_create_x32(name, S_IRUGO | S_IWUSR, nvalue_dir, - &(sr_info->nvalue_table[i].nvalue)); - snprintf(name, sizeof(name), "errminlimit_%lu", - sr_info->nvalue_table[i].volt_nominal); - debugfs_create_x32(name, S_IRUGO | S_IWUSR, nvalue_dir, - &(sr_info->nvalue_table[i].errminlimit)); - - } - - pm_runtime_put_sync(&pdev->dev); - - return ret; - -err_debugfs: - debugfs_remove_recursive(sr_info->dbg_dir); -err_list_del: - list_del(&sr_info->node); - - pm_runtime_put_sync(&pdev->dev); - - return ret; -} - -static int omap_sr_remove(struct platform_device *pdev) -{ - struct omap_sr_data *pdata = pdev->dev.platform_data; - struct omap_sr *sr_info; - - if (!pdata) { - dev_err(&pdev->dev, "%s: platform data missing\n", __func__); - return -EINVAL; - } - - sr_info = _sr_lookup(pdata->voltdm); - if (IS_ERR(sr_info)) { - dev_warn(&pdev->dev, "%s: omap_sr struct not found\n", - __func__); - return PTR_ERR(sr_info); - } - - if (sr_info->autocomp_active) - sr_stop_vddautocomp(sr_info); - debugfs_remove_recursive(sr_info->dbg_dir); - - pm_runtime_disable(&pdev->dev); - list_del(&sr_info->node); - return 0; -} - -static void omap_sr_shutdown(struct platform_device *pdev) -{ - struct omap_sr_data *pdata = pdev->dev.platform_data; - struct omap_sr *sr_info; - - if (!pdata) { - dev_err(&pdev->dev, "%s: platform data missing\n", __func__); - return; - } - - sr_info = _sr_lookup(pdata->voltdm); - if (IS_ERR(sr_info)) { - dev_warn(&pdev->dev, "%s: omap_sr struct not found\n", - __func__); - return; - } - - if (sr_info->autocomp_active) - sr_stop_vddautocomp(sr_info); - - return; -} - -static const struct of_device_id omap_sr_match[] = { - { .compatible = "ti,omap3-smartreflex-core", }, - { .compatible = "ti,omap3-smartreflex-mpu-iva", }, - { .compatible = "ti,omap4-smartreflex-core", }, - { .compatible = "ti,omap4-smartreflex-mpu", }, - { .compatible = "ti,omap4-smartreflex-iva", }, - { }, -}; -MODULE_DEVICE_TABLE(of, omap_sr_match); - -static struct platform_driver smartreflex_driver = { - .probe = omap_sr_probe, - .remove = omap_sr_remove, - .shutdown = omap_sr_shutdown, - .driver = { - .name = DRIVER_NAME, - .of_match_table = omap_sr_match, - }, -}; - -static int __init sr_init(void) -{ - int ret = 0; - - ret = platform_driver_register(&smartreflex_driver); - if (ret) { - pr_err("%s: platform driver register failed for SR\n", - __func__); - return ret; - } - - return 0; -} -late_initcall(sr_init); - -static void __exit sr_exit(void) -{ - platform_driver_unregister(&smartreflex_driver); -} -module_exit(sr_exit); - -MODULE_DESCRIPTION("OMAP Smartreflex Driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:" DRIVER_NAME); -MODULE_AUTHOR("Texas Instruments Inc"); |