From 1d5aef4950717526d4827e97a916d38d0d73657e Mon Sep 17 00:00:00 2001
From: Tony Lindgren <tony@atomide.com>
Date: Wed, 3 Oct 2012 16:36:40 -0700
Subject: ARM: OMAP: Make plat/omap-pm.h local to mach-omap2

We must move this for ARM common zImage support.

Note that neither drivers/media/rc/ir-rx51.c or
drivers/media/platform/omap3isp/ispvideo.c need
to include omap-pm.h, so this patch removes the
include for those files.

Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Timo Kokkonen <timo.t.kokkonen@iki.fi>
Cc: linux-media@vger.kernel.org
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 arch/arm/mach-omap1/pm_bus.c                 |   2 -
 arch/arm/mach-omap2/board-rx51-peripherals.c |   2 +-
 arch/arm/mach-omap2/display.c                |   2 +-
 arch/arm/mach-omap2/dsp.c                    |   2 +-
 arch/arm/mach-omap2/gpio.c                   |   2 +-
 arch/arm/mach-omap2/hsmmc.c                  |   2 +-
 arch/arm/mach-omap2/io.c                     |   2 +-
 arch/arm/mach-omap2/omap-pm.h                | 352 +++++++++++++++++++++++++++
 arch/arm/mach-omap2/pm-debug.c               |   2 +-
 arch/arm/mach-omap2/pm.c                     |   2 +-
 arch/arm/mach-omap2/serial.c                 |   2 +-
 arch/arm/mach-omap2/timer.c                  |   2 +-
 arch/arm/plat-omap/dmtimer.c                 |   3 +-
 arch/arm/plat-omap/include/plat/omap-pm.h    | 352 ---------------------------
 arch/arm/plat-omap/omap-pm-noop.c            |   4 +-
 15 files changed, 365 insertions(+), 368 deletions(-)
 create mode 100644 arch/arm/mach-omap2/omap-pm.h
 delete mode 100644 arch/arm/plat-omap/include/plat/omap-pm.h

(limited to 'arch/arm')

diff --git a/arch/arm/mach-omap1/pm_bus.c b/arch/arm/mach-omap1/pm_bus.c
index 8a74ec5e3de2..16bf2f95117c 100644
--- a/arch/arm/mach-omap1/pm_bus.c
+++ b/arch/arm/mach-omap1/pm_bus.c
@@ -19,8 +19,6 @@
 #include <linux/clk.h>
 #include <linux/err.h>
 
-#include <plat/omap-pm.h>
-
 #ifdef CONFIG_PM_RUNTIME
 static int omap1_pm_runtime_suspend(struct device *dev)
 {
diff --git a/arch/arm/mach-omap2/board-rx51-peripherals.c b/arch/arm/mach-omap2/board-rx51-peripherals.c
index c2eed847c05b..07005fe40a2a 100644
--- a/arch/arm/mach-omap2/board-rx51-peripherals.c
+++ b/arch/arm/mach-omap2/board-rx51-peripherals.c
@@ -32,7 +32,6 @@
 
 #include "common.h"
 #include <plat-omap/dma-omap.h>
-#include <plat/omap-pm.h>
 #include "gpmc-smc91x.h"
 
 #include "board-rx51.h"
@@ -51,6 +50,7 @@
 #endif
 
 #include "mux.h"
+#include "omap-pm.h"
 #include "hsmmc.h"
 #include "common-board-devices.h"
 #include "gpmc.h"
diff --git a/arch/arm/mach-omap2/display.c b/arch/arm/mach-omap2/display.c
index 815af41c4375..9aaaf4e03ca3 100644
--- a/arch/arm/mach-omap2/display.c
+++ b/arch/arm/mach-omap2/display.c
@@ -27,7 +27,7 @@
 #include <video/omapdss.h>
 #include "omap_hwmod.h"
 #include "omap_device.h"
-#include <plat/omap-pm.h>
+#include "omap-pm.h"
 #include "common.h"
 
 #include "iomap.h"
diff --git a/arch/arm/mach-omap2/dsp.c b/arch/arm/mach-omap2/dsp.c
index 98388109f22a..b155500e84a8 100644
--- a/arch/arm/mach-omap2/dsp.c
+++ b/arch/arm/mach-omap2/dsp.c
@@ -27,7 +27,7 @@
 #include "cm2xxx_3xxx.h"
 #include "prm2xxx_3xxx.h"
 #ifdef CONFIG_BRIDGE_DVFS
-#include <plat/omap-pm.h>
+#include "omap-pm.h"
 #endif
 
 #include <linux/platform_data/dsp-omap.h>
diff --git a/arch/arm/mach-omap2/gpio.c b/arch/arm/mach-omap2/gpio.c
index 80b1e1a05ce2..399acabc3d0b 100644
--- a/arch/arm/mach-omap2/gpio.c
+++ b/arch/arm/mach-omap2/gpio.c
@@ -25,7 +25,7 @@
 
 #include "omap_hwmod.h"
 #include "omap_device.h"
-#include <plat/omap-pm.h>
+#include "omap-pm.h"
 
 #include "powerdomain.h"
 
diff --git a/arch/arm/mach-omap2/hsmmc.c b/arch/arm/mach-omap2/hsmmc.c
index 797e8c6a4130..ddbf2eb6ba5b 100644
--- a/arch/arm/mach-omap2/hsmmc.c
+++ b/arch/arm/mach-omap2/hsmmc.c
@@ -17,8 +17,8 @@
 #include <mach/hardware.h>
 #include <linux/platform_data/gpio-omap.h>
 
-#include <plat/omap-pm.h>
 #include "omap_device.h"
+#include "omap-pm.h"
 
 #include "mux.h"
 #include "mmc.h"
diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
index b373cb59845c..80d1cf17af8c 100644
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -26,7 +26,6 @@
 #include <asm/mach/map.h>
 
 #include <plat/serial.h>
-#include <plat/omap-pm.h>
 #include <plat-omap/dma-omap.h>
 
 #include "../plat-omap/sram.h"
@@ -42,6 +41,7 @@
 #include "clock2xxx.h"
 #include "clock3xxx.h"
 #include "clock44xx.h"
+#include "omap-pm.h"
 #include "sdrc.h"
 
 /*
diff --git a/arch/arm/mach-omap2/omap-pm.h b/arch/arm/mach-omap2/omap-pm.h
new file mode 100644
index 000000000000..67faa7b8fe92
--- /dev/null
+++ b/arch/arm/mach-omap2/omap-pm.h
@@ -0,0 +1,352 @@
+/*
+ * omap-pm.h - OMAP power management interface
+ *
+ * Copyright (C) 2008-2010 Texas Instruments, Inc.
+ * Copyright (C) 2008-2010 Nokia Corporation
+ * Paul Walmsley
+ *
+ * Interface developed by (in alphabetical order): Karthik Dasu, Jouni
+ * Högander, Tony Lindgren, Rajendra Nayak, Sakari Poussa,
+ * Veeramanikandan Raju, Anand Sawant, Igor Stoppa, Paul Walmsley,
+ * Richard Woodruff
+ */
+
+#ifndef ASM_ARM_ARCH_OMAP_OMAP_PM_H
+#define ASM_ARM_ARCH_OMAP_OMAP_PM_H
+
+#include <linux/device.h>
+#include <linux/cpufreq.h>
+#include <linux/clk.h>
+#include <linux/opp.h>
+
+/*
+ * agent_id values for use with omap_pm_set_min_bus_tput():
+ *
+ * OCP_INITIATOR_AGENT is only valid for devices that can act as
+ * initiators -- it represents the device's L3 interconnect
+ * connection.  OCP_TARGET_AGENT represents the device's L4
+ * interconnect connection.
+ */
+#define OCP_TARGET_AGENT		1
+#define OCP_INITIATOR_AGENT		2
+
+/**
+ * omap_pm_if_early_init - OMAP PM init code called before clock fw init
+ * @mpu_opp_table: array ptr to struct omap_opp for MPU
+ * @dsp_opp_table: array ptr to struct omap_opp for DSP
+ * @l3_opp_table : array ptr to struct omap_opp for CORE
+ *
+ * Initialize anything that must be configured before the clock
+ * framework starts.  The "_if_" is to avoid name collisions with the
+ * PM idle-loop code.
+ */
+int __init omap_pm_if_early_init(void);
+
+/**
+ * omap_pm_if_init - OMAP PM init code called after clock fw init
+ *
+ * The main initialization code.  OPP tables are passed in here.  The
+ * "_if_" is to avoid name collisions with the PM idle-loop code.
+ */
+int __init omap_pm_if_init(void);
+
+/**
+ * omap_pm_if_exit - OMAP PM exit code
+ *
+ * Exit code; currently unused.  The "_if_" is to avoid name
+ * collisions with the PM idle-loop code.
+ */
+void omap_pm_if_exit(void);
+
+/*
+ * Device-driver-originated constraints (via board-*.c files, platform_data)
+ */
+
+
+/**
+ * omap_pm_set_max_mpu_wakeup_lat - set the maximum MPU wakeup latency
+ * @dev: struct device * requesting the constraint
+ * @t: maximum MPU wakeup latency in microseconds
+ *
+ * Request that the maximum interrupt latency for the MPU to be no
+ * greater than @t microseconds. "Interrupt latency" in this case is
+ * defined as the elapsed time from the occurrence of a hardware or
+ * timer interrupt to the time when the device driver's interrupt
+ * service routine has been entered by the MPU.
+ *
+ * It is intended that underlying PM code will use this information to
+ * determine what power state to put the MPU powerdomain into, and
+ * possibly the CORE powerdomain as well, since interrupt handling
+ * code currently runs from SDRAM.  Advanced PM or board*.c code may
+ * also configure interrupt controller priorities, OCP bus priorities,
+ * CPU speed(s), etc.
+ *
+ * This function will not affect device wakeup latency, e.g., time
+ * elapsed from when a device driver enables a hardware device with
+ * clk_enable(), to when the device is ready for register access or
+ * other use.  To control this device wakeup latency, use
+ * omap_pm_set_max_dev_wakeup_lat()
+ *
+ * Multiple calls to omap_pm_set_max_mpu_wakeup_lat() will replace the
+ * previous t value.  To remove the latency target for the MPU, call
+ * with t = -1.
+ *
+ * XXX This constraint will be deprecated soon in favor of the more
+ * general omap_pm_set_max_dev_wakeup_lat()
+ *
+ * Returns -EINVAL for an invalid argument, -ERANGE if the constraint
+ * is not satisfiable, or 0 upon success.
+ */
+int omap_pm_set_max_mpu_wakeup_lat(struct device *dev, long t);
+
+
+/**
+ * omap_pm_set_min_bus_tput - set minimum bus throughput needed by device
+ * @dev: struct device * requesting the constraint
+ * @tbus_id: interconnect to operate on (OCP_{INITIATOR,TARGET}_AGENT)
+ * @r: minimum throughput (in KiB/s)
+ *
+ * Request that the minimum data throughput on the OCP interconnect
+ * attached to device @dev interconnect agent @tbus_id be no less
+ * than @r KiB/s.
+ *
+ * It is expected that the OMAP PM or bus code will use this
+ * information to set the interconnect clock to run at the lowest
+ * possible speed that satisfies all current system users.  The PM or
+ * bus code will adjust the estimate based on its model of the bus, so
+ * device driver authors should attempt to specify an accurate
+ * quantity for their device use case, and let the PM or bus code
+ * overestimate the numbers as necessary to handle request/response
+ * latency, other competing users on the system, etc.  On OMAP2/3, if
+ * a driver requests a minimum L4 interconnect speed constraint, the
+ * code will also need to add an minimum L3 interconnect speed
+ * constraint,
+ *
+ * Multiple calls to omap_pm_set_min_bus_tput() will replace the
+ * previous rate value for this device.  To remove the interconnect
+ * throughput restriction for this device, call with r = 0.
+ *
+ * Returns -EINVAL for an invalid argument, -ERANGE if the constraint
+ * is not satisfiable, or 0 upon success.
+ */
+int omap_pm_set_min_bus_tput(struct device *dev, u8 agent_id, unsigned long r);
+
+
+/**
+ * omap_pm_set_max_dev_wakeup_lat - set the maximum device enable latency
+ * @req_dev: struct device * requesting the constraint, or NULL if none
+ * @dev: struct device * to set the constraint one
+ * @t: maximum device wakeup latency in microseconds
+ *
+ * Request that the maximum amount of time necessary for a device @dev
+ * to become accessible after its clocks are enabled should be no
+ * greater than @t microseconds.  Specifically, this represents the
+ * time from when a device driver enables device clocks with
+ * clk_enable(), to when the register reads and writes on the device
+ * will succeed.  This function should be called before clk_disable()
+ * is called, since the power state transition decision may be made
+ * during clk_disable().
+ *
+ * It is intended that underlying PM code will use this information to
+ * determine what power state to put the powerdomain enclosing this
+ * device into.
+ *
+ * Multiple calls to omap_pm_set_max_dev_wakeup_lat() will replace the
+ * previous wakeup latency values for this device.  To remove the
+ * wakeup latency restriction for this device, call with t = -1.
+ *
+ * Returns -EINVAL for an invalid argument, -ERANGE if the constraint
+ * is not satisfiable, or 0 upon success.
+ */
+int omap_pm_set_max_dev_wakeup_lat(struct device *req_dev, struct device *dev,
+				   long t);
+
+
+/**
+ * omap_pm_set_max_sdma_lat - set the maximum system DMA transfer start latency
+ * @dev: struct device *
+ * @t: maximum DMA transfer start latency in microseconds
+ *
+ * Request that the maximum system DMA transfer start latency for this
+ * device 'dev' should be no greater than 't' microseconds.  "DMA
+ * transfer start latency" here is defined as the elapsed time from
+ * when a device (e.g., McBSP) requests that a system DMA transfer
+ * start or continue, to the time at which data starts to flow into
+ * that device from the system DMA controller.
+ *
+ * It is intended that underlying PM code will use this information to
+ * determine what power state to put the CORE powerdomain into.
+ *
+ * Since system DMA transfers may not involve the MPU, this function
+ * will not affect MPU wakeup latency.  Use set_max_cpu_lat() to do
+ * so.  Similarly, this function will not affect device wakeup latency
+ * -- use set_max_dev_wakeup_lat() to affect that.
+ *
+ * Multiple calls to set_max_sdma_lat() will replace the previous t
+ * value for this device.  To remove the maximum DMA latency for this
+ * device, call with t = -1.
+ *
+ * Returns -EINVAL for an invalid argument, -ERANGE if the constraint
+ * is not satisfiable, or 0 upon success.
+ */
+int omap_pm_set_max_sdma_lat(struct device *dev, long t);
+
+
+/**
+ * omap_pm_set_min_clk_rate - set minimum clock rate requested by @dev
+ * @dev: struct device * requesting the constraint
+ * @clk: struct clk * to set the minimum rate constraint on
+ * @r: minimum rate in Hz
+ *
+ * Request that the minimum clock rate on the device @dev's clk @clk
+ * be no less than @r Hz.
+ *
+ * It is expected that the OMAP PM code will use this information to
+ * find an OPP or clock setting that will satisfy this clock rate
+ * constraint, along with any other applicable system constraints on
+ * the clock rate or corresponding voltage, etc.
+ *
+ * omap_pm_set_min_clk_rate() differs from the clock code's
+ * clk_set_rate() in that it considers other constraints before taking
+ * any hardware action, and may change a system OPP rather than just a
+ * clock rate.  clk_set_rate() is intended to be a low-level
+ * interface.
+ *
+ * omap_pm_set_min_clk_rate() is easily open to abuse.  A better API
+ * would be something like "omap_pm_set_min_dev_performance()";
+ * however, there is no easily-generalizable concept of performance
+ * that applies to all devices.  Only a device (and possibly the
+ * device subsystem) has both the subsystem-specific knowledge, and
+ * the hardware IP block-specific knowledge, to translate a constraint
+ * on "touchscreen sampling accuracy" or "number of pixels or polygons
+ * rendered per second" to a clock rate.  This translation can be
+ * dependent on the hardware IP block's revision, or firmware version,
+ * and the driver is the only code on the system that has this
+ * information and can know how to translate that into a clock rate.
+ *
+ * The intended use-case for this function is for userspace or other
+ * kernel code to communicate a particular performance requirement to
+ * a subsystem; then for the subsystem to communicate that requirement
+ * to something that is meaningful to the device driver; then for the
+ * device driver to convert that requirement to a clock rate, and to
+ * then call omap_pm_set_min_clk_rate().
+ *
+ * Users of this function (such as device drivers) should not simply
+ * call this function with some high clock rate to ensure "high
+ * performance."  Rather, the device driver should take a performance
+ * constraint from its subsystem, such as "render at least X polygons
+ * per second," and use some formula or table to convert that into a
+ * clock rate constraint given the hardware type and hardware
+ * revision.  Device drivers or subsystems should not assume that they
+ * know how to make a power/performance tradeoff - some device use
+ * cases may tolerate a lower-fidelity device function for lower power
+ * consumption; others may demand a higher-fidelity device function,
+ * no matter what the power consumption.
+ *
+ * Multiple calls to omap_pm_set_min_clk_rate() will replace the
+ * previous rate value for the device @dev.  To remove the minimum clock
+ * rate constraint for the device, call with r = 0.
+ *
+ * Returns -EINVAL for an invalid argument, -ERANGE if the constraint
+ * is not satisfiable, or 0 upon success.
+ */
+int omap_pm_set_min_clk_rate(struct device *dev, struct clk *c, long r);
+
+/*
+ * DSP Bridge-specific constraints
+ */
+
+/**
+ * omap_pm_dsp_get_opp_table - get OPP->DSP clock frequency table
+ *
+ * Intended for use by DSPBridge.  Returns an array of OPP->DSP clock
+ * frequency entries.  The final item in the array should have .rate =
+ * .opp_id = 0.
+ */
+const struct omap_opp *omap_pm_dsp_get_opp_table(void);
+
+/**
+ * omap_pm_dsp_set_min_opp - receive desired OPP target ID from DSP Bridge
+ * @opp_id: target DSP OPP ID
+ *
+ * Set a minimum OPP ID for the DSP.  This is intended to be called
+ * only from the DSP Bridge MPU-side driver.  Unfortunately, the only
+ * information that code receives from the DSP/BIOS load estimator is the
+ * target OPP ID; hence, this interface.  No return value.
+ */
+void omap_pm_dsp_set_min_opp(u8 opp_id);
+
+/**
+ * omap_pm_dsp_get_opp - report the current DSP OPP ID
+ *
+ * Report the current OPP for the DSP.  Since on OMAP3, the DSP and
+ * MPU share a single voltage domain, the OPP ID returned back may
+ * represent a higher DSP speed than the OPP requested via
+ * omap_pm_dsp_set_min_opp().
+ *
+ * Returns the current VDD1 OPP ID, or 0 upon error.
+ */
+u8 omap_pm_dsp_get_opp(void);
+
+
+/*
+ * CPUFreq-originated constraint
+ *
+ * In the future, this should be handled by custom OPP clocktype
+ * functions.
+ */
+
+/**
+ * omap_pm_cpu_get_freq_table - return a cpufreq_frequency_table array ptr
+ *
+ * Provide a frequency table usable by CPUFreq for the current chip/board.
+ * Returns a pointer to a struct cpufreq_frequency_table array or NULL
+ * upon error.
+ */
+struct cpufreq_frequency_table **omap_pm_cpu_get_freq_table(void);
+
+/**
+ * omap_pm_cpu_set_freq - set the current minimum MPU frequency
+ * @f: MPU frequency in Hz
+ *
+ * Set the current minimum CPU frequency.  The actual CPU frequency
+ * used could end up higher if the DSP requested a higher OPP.
+ * Intended to be called by plat-omap/cpu_omap.c:omap_target().  No
+ * return value.
+ */
+void omap_pm_cpu_set_freq(unsigned long f);
+
+/**
+ * omap_pm_cpu_get_freq - report the current CPU frequency
+ *
+ * Returns the current MPU frequency, or 0 upon error.
+ */
+unsigned long omap_pm_cpu_get_freq(void);
+
+
+/*
+ * Device context loss tracking
+ */
+
+/**
+ * omap_pm_get_dev_context_loss_count - return count of times dev has lost ctx
+ * @dev: struct device *
+ *
+ * This function returns the number of times that the device @dev has
+ * lost its internal context.  This generally occurs on a powerdomain
+ * transition to OFF.  Drivers use this as an optimization to avoid restoring
+ * context if the device hasn't lost it.  To use, drivers should initially
+ * call this in their context save functions and store the result.  Early in
+ * the driver's context restore function, the driver should call this function
+ * again, and compare the result to the stored counter.  If they differ, the
+ * driver must restore device context.   If the number of context losses
+ * exceeds the maximum positive integer, the function will wrap to 0 and
+ * continue counting.  Returns the number of context losses for this device,
+ * or negative value upon error.
+ */
+int omap_pm_get_dev_context_loss_count(struct device *dev);
+
+void omap_pm_enable_off_mode(void);
+void omap_pm_disable_off_mode(void);
+
+#endif
diff --git a/arch/arm/mach-omap2/pm-debug.c b/arch/arm/mach-omap2/pm-debug.c
index 46092cd806fa..b91283edf415 100644
--- a/arch/arm/mach-omap2/pm-debug.c
+++ b/arch/arm/mach-omap2/pm-debug.c
@@ -31,7 +31,7 @@
 #include "powerdomain.h"
 #include "clockdomain.h"
 #include <plat/dmtimer.h>
-#include <plat/omap-pm.h>
+#include "omap-pm.h"
 
 #include "cm2xxx_3xxx.h"
 #include "prm2xxx_3xxx.h"
diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c
index 4f749a1e3aa2..e66855ef4c78 100644
--- a/arch/arm/mach-omap2/pm.c
+++ b/arch/arm/mach-omap2/pm.c
@@ -20,7 +20,7 @@
 
 #include <asm/system_misc.h>
 
-#include <plat/omap-pm.h>
+#include "omap-pm.h"
 #include "omap_device.h"
 #include "common.h"
 
diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
index a4fb791be2da..a3da4654de97 100644
--- a/arch/arm/mach-omap2/serial.c
+++ b/arch/arm/mach-omap2/serial.c
@@ -29,12 +29,12 @@
 
 #include <plat/omap-serial.h>
 #include <plat-omap/dma-omap.h>
-#include <plat/omap-pm.h>
 #include <plat/serial.h>
 
 #include "common.h"
 #include "omap_hwmod.h"
 #include "omap_device.h"
+#include "omap-pm.h"
 #include "prm2xxx_3xxx.h"
 #include "pm.h"
 #include "cm2xxx_3xxx.h"
diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
index b11df8230145..45598ac819be 100644
--- a/arch/arm/mach-omap2/timer.c
+++ b/arch/arm/mach-omap2/timer.c
@@ -46,7 +46,7 @@
 #include "omap_hwmod.h"
 #include "omap_device.h"
 #include <plat/dmtimer.h>
-#include <plat/omap-pm.h>
+#include "omap-pm.h"
 
 #include "soc.h"
 #include "common.h"
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 938b50a33439..4a0b30a4ebda 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -42,10 +42,11 @@
 #include <linux/pm_runtime.h>
 
 #include <plat/dmtimer.h>
-#include <plat/omap-pm.h>
 
 #include <mach/hardware.h>
 
+#include "../mach-omap2/omap-pm.h"
+
 static u32 omap_reserved_systimers;
 static LIST_HEAD(omap_timer_list);
 static DEFINE_SPINLOCK(dm_timer_lock);
diff --git a/arch/arm/plat-omap/include/plat/omap-pm.h b/arch/arm/plat-omap/include/plat/omap-pm.h
deleted file mode 100644
index 67faa7b8fe92..000000000000
--- a/arch/arm/plat-omap/include/plat/omap-pm.h
+++ /dev/null
@@ -1,352 +0,0 @@
-/*
- * omap-pm.h - OMAP power management interface
- *
- * Copyright (C) 2008-2010 Texas Instruments, Inc.
- * Copyright (C) 2008-2010 Nokia Corporation
- * Paul Walmsley
- *
- * Interface developed by (in alphabetical order): Karthik Dasu, Jouni
- * Högander, Tony Lindgren, Rajendra Nayak, Sakari Poussa,
- * Veeramanikandan Raju, Anand Sawant, Igor Stoppa, Paul Walmsley,
- * Richard Woodruff
- */
-
-#ifndef ASM_ARM_ARCH_OMAP_OMAP_PM_H
-#define ASM_ARM_ARCH_OMAP_OMAP_PM_H
-
-#include <linux/device.h>
-#include <linux/cpufreq.h>
-#include <linux/clk.h>
-#include <linux/opp.h>
-
-/*
- * agent_id values for use with omap_pm_set_min_bus_tput():
- *
- * OCP_INITIATOR_AGENT is only valid for devices that can act as
- * initiators -- it represents the device's L3 interconnect
- * connection.  OCP_TARGET_AGENT represents the device's L4
- * interconnect connection.
- */
-#define OCP_TARGET_AGENT		1
-#define OCP_INITIATOR_AGENT		2
-
-/**
- * omap_pm_if_early_init - OMAP PM init code called before clock fw init
- * @mpu_opp_table: array ptr to struct omap_opp for MPU
- * @dsp_opp_table: array ptr to struct omap_opp for DSP
- * @l3_opp_table : array ptr to struct omap_opp for CORE
- *
- * Initialize anything that must be configured before the clock
- * framework starts.  The "_if_" is to avoid name collisions with the
- * PM idle-loop code.
- */
-int __init omap_pm_if_early_init(void);
-
-/**
- * omap_pm_if_init - OMAP PM init code called after clock fw init
- *
- * The main initialization code.  OPP tables are passed in here.  The
- * "_if_" is to avoid name collisions with the PM idle-loop code.
- */
-int __init omap_pm_if_init(void);
-
-/**
- * omap_pm_if_exit - OMAP PM exit code
- *
- * Exit code; currently unused.  The "_if_" is to avoid name
- * collisions with the PM idle-loop code.
- */
-void omap_pm_if_exit(void);
-
-/*
- * Device-driver-originated constraints (via board-*.c files, platform_data)
- */
-
-
-/**
- * omap_pm_set_max_mpu_wakeup_lat - set the maximum MPU wakeup latency
- * @dev: struct device * requesting the constraint
- * @t: maximum MPU wakeup latency in microseconds
- *
- * Request that the maximum interrupt latency for the MPU to be no
- * greater than @t microseconds. "Interrupt latency" in this case is
- * defined as the elapsed time from the occurrence of a hardware or
- * timer interrupt to the time when the device driver's interrupt
- * service routine has been entered by the MPU.
- *
- * It is intended that underlying PM code will use this information to
- * determine what power state to put the MPU powerdomain into, and
- * possibly the CORE powerdomain as well, since interrupt handling
- * code currently runs from SDRAM.  Advanced PM or board*.c code may
- * also configure interrupt controller priorities, OCP bus priorities,
- * CPU speed(s), etc.
- *
- * This function will not affect device wakeup latency, e.g., time
- * elapsed from when a device driver enables a hardware device with
- * clk_enable(), to when the device is ready for register access or
- * other use.  To control this device wakeup latency, use
- * omap_pm_set_max_dev_wakeup_lat()
- *
- * Multiple calls to omap_pm_set_max_mpu_wakeup_lat() will replace the
- * previous t value.  To remove the latency target for the MPU, call
- * with t = -1.
- *
- * XXX This constraint will be deprecated soon in favor of the more
- * general omap_pm_set_max_dev_wakeup_lat()
- *
- * Returns -EINVAL for an invalid argument, -ERANGE if the constraint
- * is not satisfiable, or 0 upon success.
- */
-int omap_pm_set_max_mpu_wakeup_lat(struct device *dev, long t);
-
-
-/**
- * omap_pm_set_min_bus_tput - set minimum bus throughput needed by device
- * @dev: struct device * requesting the constraint
- * @tbus_id: interconnect to operate on (OCP_{INITIATOR,TARGET}_AGENT)
- * @r: minimum throughput (in KiB/s)
- *
- * Request that the minimum data throughput on the OCP interconnect
- * attached to device @dev interconnect agent @tbus_id be no less
- * than @r KiB/s.
- *
- * It is expected that the OMAP PM or bus code will use this
- * information to set the interconnect clock to run at the lowest
- * possible speed that satisfies all current system users.  The PM or
- * bus code will adjust the estimate based on its model of the bus, so
- * device driver authors should attempt to specify an accurate
- * quantity for their device use case, and let the PM or bus code
- * overestimate the numbers as necessary to handle request/response
- * latency, other competing users on the system, etc.  On OMAP2/3, if
- * a driver requests a minimum L4 interconnect speed constraint, the
- * code will also need to add an minimum L3 interconnect speed
- * constraint,
- *
- * Multiple calls to omap_pm_set_min_bus_tput() will replace the
- * previous rate value for this device.  To remove the interconnect
- * throughput restriction for this device, call with r = 0.
- *
- * Returns -EINVAL for an invalid argument, -ERANGE if the constraint
- * is not satisfiable, or 0 upon success.
- */
-int omap_pm_set_min_bus_tput(struct device *dev, u8 agent_id, unsigned long r);
-
-
-/**
- * omap_pm_set_max_dev_wakeup_lat - set the maximum device enable latency
- * @req_dev: struct device * requesting the constraint, or NULL if none
- * @dev: struct device * to set the constraint one
- * @t: maximum device wakeup latency in microseconds
- *
- * Request that the maximum amount of time necessary for a device @dev
- * to become accessible after its clocks are enabled should be no
- * greater than @t microseconds.  Specifically, this represents the
- * time from when a device driver enables device clocks with
- * clk_enable(), to when the register reads and writes on the device
- * will succeed.  This function should be called before clk_disable()
- * is called, since the power state transition decision may be made
- * during clk_disable().
- *
- * It is intended that underlying PM code will use this information to
- * determine what power state to put the powerdomain enclosing this
- * device into.
- *
- * Multiple calls to omap_pm_set_max_dev_wakeup_lat() will replace the
- * previous wakeup latency values for this device.  To remove the
- * wakeup latency restriction for this device, call with t = -1.
- *
- * Returns -EINVAL for an invalid argument, -ERANGE if the constraint
- * is not satisfiable, or 0 upon success.
- */
-int omap_pm_set_max_dev_wakeup_lat(struct device *req_dev, struct device *dev,
-				   long t);
-
-
-/**
- * omap_pm_set_max_sdma_lat - set the maximum system DMA transfer start latency
- * @dev: struct device *
- * @t: maximum DMA transfer start latency in microseconds
- *
- * Request that the maximum system DMA transfer start latency for this
- * device 'dev' should be no greater than 't' microseconds.  "DMA
- * transfer start latency" here is defined as the elapsed time from
- * when a device (e.g., McBSP) requests that a system DMA transfer
- * start or continue, to the time at which data starts to flow into
- * that device from the system DMA controller.
- *
- * It is intended that underlying PM code will use this information to
- * determine what power state to put the CORE powerdomain into.
- *
- * Since system DMA transfers may not involve the MPU, this function
- * will not affect MPU wakeup latency.  Use set_max_cpu_lat() to do
- * so.  Similarly, this function will not affect device wakeup latency
- * -- use set_max_dev_wakeup_lat() to affect that.
- *
- * Multiple calls to set_max_sdma_lat() will replace the previous t
- * value for this device.  To remove the maximum DMA latency for this
- * device, call with t = -1.
- *
- * Returns -EINVAL for an invalid argument, -ERANGE if the constraint
- * is not satisfiable, or 0 upon success.
- */
-int omap_pm_set_max_sdma_lat(struct device *dev, long t);
-
-
-/**
- * omap_pm_set_min_clk_rate - set minimum clock rate requested by @dev
- * @dev: struct device * requesting the constraint
- * @clk: struct clk * to set the minimum rate constraint on
- * @r: minimum rate in Hz
- *
- * Request that the minimum clock rate on the device @dev's clk @clk
- * be no less than @r Hz.
- *
- * It is expected that the OMAP PM code will use this information to
- * find an OPP or clock setting that will satisfy this clock rate
- * constraint, along with any other applicable system constraints on
- * the clock rate or corresponding voltage, etc.
- *
- * omap_pm_set_min_clk_rate() differs from the clock code's
- * clk_set_rate() in that it considers other constraints before taking
- * any hardware action, and may change a system OPP rather than just a
- * clock rate.  clk_set_rate() is intended to be a low-level
- * interface.
- *
- * omap_pm_set_min_clk_rate() is easily open to abuse.  A better API
- * would be something like "omap_pm_set_min_dev_performance()";
- * however, there is no easily-generalizable concept of performance
- * that applies to all devices.  Only a device (and possibly the
- * device subsystem) has both the subsystem-specific knowledge, and
- * the hardware IP block-specific knowledge, to translate a constraint
- * on "touchscreen sampling accuracy" or "number of pixels or polygons
- * rendered per second" to a clock rate.  This translation can be
- * dependent on the hardware IP block's revision, or firmware version,
- * and the driver is the only code on the system that has this
- * information and can know how to translate that into a clock rate.
- *
- * The intended use-case for this function is for userspace or other
- * kernel code to communicate a particular performance requirement to
- * a subsystem; then for the subsystem to communicate that requirement
- * to something that is meaningful to the device driver; then for the
- * device driver to convert that requirement to a clock rate, and to
- * then call omap_pm_set_min_clk_rate().
- *
- * Users of this function (such as device drivers) should not simply
- * call this function with some high clock rate to ensure "high
- * performance."  Rather, the device driver should take a performance
- * constraint from its subsystem, such as "render at least X polygons
- * per second," and use some formula or table to convert that into a
- * clock rate constraint given the hardware type and hardware
- * revision.  Device drivers or subsystems should not assume that they
- * know how to make a power/performance tradeoff - some device use
- * cases may tolerate a lower-fidelity device function for lower power
- * consumption; others may demand a higher-fidelity device function,
- * no matter what the power consumption.
- *
- * Multiple calls to omap_pm_set_min_clk_rate() will replace the
- * previous rate value for the device @dev.  To remove the minimum clock
- * rate constraint for the device, call with r = 0.
- *
- * Returns -EINVAL for an invalid argument, -ERANGE if the constraint
- * is not satisfiable, or 0 upon success.
- */
-int omap_pm_set_min_clk_rate(struct device *dev, struct clk *c, long r);
-
-/*
- * DSP Bridge-specific constraints
- */
-
-/**
- * omap_pm_dsp_get_opp_table - get OPP->DSP clock frequency table
- *
- * Intended for use by DSPBridge.  Returns an array of OPP->DSP clock
- * frequency entries.  The final item in the array should have .rate =
- * .opp_id = 0.
- */
-const struct omap_opp *omap_pm_dsp_get_opp_table(void);
-
-/**
- * omap_pm_dsp_set_min_opp - receive desired OPP target ID from DSP Bridge
- * @opp_id: target DSP OPP ID
- *
- * Set a minimum OPP ID for the DSP.  This is intended to be called
- * only from the DSP Bridge MPU-side driver.  Unfortunately, the only
- * information that code receives from the DSP/BIOS load estimator is the
- * target OPP ID; hence, this interface.  No return value.
- */
-void omap_pm_dsp_set_min_opp(u8 opp_id);
-
-/**
- * omap_pm_dsp_get_opp - report the current DSP OPP ID
- *
- * Report the current OPP for the DSP.  Since on OMAP3, the DSP and
- * MPU share a single voltage domain, the OPP ID returned back may
- * represent a higher DSP speed than the OPP requested via
- * omap_pm_dsp_set_min_opp().
- *
- * Returns the current VDD1 OPP ID, or 0 upon error.
- */
-u8 omap_pm_dsp_get_opp(void);
-
-
-/*
- * CPUFreq-originated constraint
- *
- * In the future, this should be handled by custom OPP clocktype
- * functions.
- */
-
-/**
- * omap_pm_cpu_get_freq_table - return a cpufreq_frequency_table array ptr
- *
- * Provide a frequency table usable by CPUFreq for the current chip/board.
- * Returns a pointer to a struct cpufreq_frequency_table array or NULL
- * upon error.
- */
-struct cpufreq_frequency_table **omap_pm_cpu_get_freq_table(void);
-
-/**
- * omap_pm_cpu_set_freq - set the current minimum MPU frequency
- * @f: MPU frequency in Hz
- *
- * Set the current minimum CPU frequency.  The actual CPU frequency
- * used could end up higher if the DSP requested a higher OPP.
- * Intended to be called by plat-omap/cpu_omap.c:omap_target().  No
- * return value.
- */
-void omap_pm_cpu_set_freq(unsigned long f);
-
-/**
- * omap_pm_cpu_get_freq - report the current CPU frequency
- *
- * Returns the current MPU frequency, or 0 upon error.
- */
-unsigned long omap_pm_cpu_get_freq(void);
-
-
-/*
- * Device context loss tracking
- */
-
-/**
- * omap_pm_get_dev_context_loss_count - return count of times dev has lost ctx
- * @dev: struct device *
- *
- * This function returns the number of times that the device @dev has
- * lost its internal context.  This generally occurs on a powerdomain
- * transition to OFF.  Drivers use this as an optimization to avoid restoring
- * context if the device hasn't lost it.  To use, drivers should initially
- * call this in their context save functions and store the result.  Early in
- * the driver's context restore function, the driver should call this function
- * again, and compare the result to the stored counter.  If they differ, the
- * driver must restore device context.   If the number of context losses
- * exceeds the maximum positive integer, the function will wrap to 0 and
- * continue counting.  Returns the number of context losses for this device,
- * or negative value upon error.
- */
-int omap_pm_get_dev_context_loss_count(struct device *dev);
-
-void omap_pm_enable_off_mode(void);
-void omap_pm_disable_off_mode(void);
-
-#endif
diff --git a/arch/arm/plat-omap/omap-pm-noop.c b/arch/arm/plat-omap/omap-pm-noop.c
index 3c96b567370e..198685b894b0 100644
--- a/arch/arm/plat-omap/omap-pm-noop.c
+++ b/arch/arm/plat-omap/omap-pm-noop.c
@@ -22,10 +22,8 @@
 #include <linux/device.h>
 #include <linux/platform_device.h>
 
-/* Interface documentation is in mach/omap-pm.h */
-#include <plat/omap-pm.h>
-
 #include "../mach-omap2/omap_device.h"
+#include "../mach-omap2/omap-pm.h"
 
 static bool off_mode_enabled;
 static int dummy_context_loss_counter;
-- 
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