diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-08 11:14:29 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-08 11:14:29 -0700 |
commit | b3345d7c57d70e6cb6749af25cdbe80515582e99 (patch) | |
tree | 04cce706bc7e944ad1fb257108a8ae735948f97f /arch/arm/plat-samsung/clock.c | |
parent | 44c916d58b9ef1f2c4aec2def57fa8289c716a60 (diff) | |
parent | c2fff85e21818952aa0ee5778926beee6c03e579 (diff) |
Merge tag 'soc-for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC platform changes from Olof Johansson:
"This is the bulk of new SoC enablement and other platform changes for
3.17:
- Samsung S5PV210 has been converted to DT and multiplatform
- Clock drivers and bindings for some of the lower-end i.MX 1/2
platforms
- Kirkwood, one of the popular Marvell platforms, is folded into the
mvebu platform code, removing mach-kirkwood
- Hwmod data for TI AM43xx and DRA7 platforms
- More additions of Renesas shmobile platform support
- Removal of plat-samsung contents that can be removed with S5PV210
being multiplatform/DT-enabled and the other two old platforms
being removed
New platforms (most with only basic support right now):
- Hisilicon X5HD2 settop box chipset is introduced
- Mediatek MT6589 (mobile chipset) is introduced
- Broadcom BCM7xxx settop box chipset is introduced
+ as usual a lot other pieces all over the platform code"
* tag 'soc-for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (240 commits)
ARM: hisi: remove smp from machine descriptor
power: reset: move hisilicon reboot code
ARM: dts: Add hix5hd2-dkb dts file.
ARM: debug: Rename Hi3716 to HIX5HD2
ARM: hisi: enable hix5hd2 SoC
ARM: hisi: add ARCH_HISI
MAINTAINERS: add entry for Broadcom ARM STB architecture
ARM: brcmstb: select GISB arbiter and interrupt drivers
ARM: brcmstb: add infrastructure for ARM-based Broadcom STB SoCs
ARM: configs: enable SMP in bcm_defconfig
ARM: add SMP support for Broadcom mobile SoCs
Documentation: arm: misc updates to Marvell EBU SoC status
Documentation: arm: add URLs to public datasheets for the Marvell Armada XP SoC
ARM: mvebu: fix build without platforms selected
ARM: mvebu: add cpuidle support for Armada 38x
ARM: mvebu: add cpuidle support for Armada 370
cpuidle: mvebu: add Armada 38x support
cpuidle: mvebu: add Armada 370 support
cpuidle: mvebu: rename the driver from armada-370-xp to mvebu-v7
ARM: mvebu: export the SCU address
...
Diffstat (limited to 'arch/arm/plat-samsung/clock.c')
-rw-r--r-- | arch/arm/plat-samsung/clock.c | 539 |
1 files changed, 0 insertions, 539 deletions
diff --git a/arch/arm/plat-samsung/clock.c b/arch/arm/plat-samsung/clock.c deleted file mode 100644 index d103ac1a52af..000000000000 --- a/arch/arm/plat-samsung/clock.c +++ /dev/null @@ -1,539 +0,0 @@ -/* linux/arch/arm/plat-s3c24xx/clock.c - * - * Copyright 2004-2005 Simtec Electronics - * Ben Dooks <ben@simtec.co.uk> - * - * S3C24XX Core clock control support - * - * Based on, and code from linux/arch/arm/mach-versatile/clock.c - ** - ** Copyright (C) 2004 ARM Limited. - ** Written by Deep Blue Solutions Limited. - * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -*/ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/list.h> -#include <linux/errno.h> -#include <linux/err.h> -#include <linux/platform_device.h> -#include <linux/device.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/clk.h> -#include <linux/spinlock.h> -#include <linux/io.h> -#if defined(CONFIG_DEBUG_FS) -#include <linux/debugfs.h> -#endif - -#include <asm/irq.h> - -#include <plat/cpu-freq.h> - -#include <plat/clock.h> -#include <plat/cpu.h> - -#include <linux/serial_core.h> -#include <linux/serial_s3c.h> /* for s3c24xx_uart_devs */ - -/* clock information */ - -static LIST_HEAD(clocks); - -/* We originally used an mutex here, but some contexts (see resume) - * are calling functions such as clk_set_parent() with IRQs disabled - * causing an BUG to be triggered. - */ -DEFINE_SPINLOCK(clocks_lock); - -/* Global watchdog clock used by arch_wtd_reset() callback */ -struct clk *s3c2410_wdtclk; -static int __init s3c_wdt_reset_init(void) -{ - s3c2410_wdtclk = clk_get(NULL, "watchdog"); - if (IS_ERR(s3c2410_wdtclk)) - printk(KERN_WARNING "%s: warning: cannot get watchdog clock\n", __func__); - return 0; -} -arch_initcall(s3c_wdt_reset_init); - -/* enable and disable calls for use with the clk struct */ - -static int clk_null_enable(struct clk *clk, int enable) -{ - return 0; -} - -int clk_enable(struct clk *clk) -{ - unsigned long flags; - - if (IS_ERR(clk) || clk == NULL) - return -EINVAL; - - clk_enable(clk->parent); - - spin_lock_irqsave(&clocks_lock, flags); - - if ((clk->usage++) == 0) - (clk->enable)(clk, 1); - - spin_unlock_irqrestore(&clocks_lock, flags); - return 0; -} - -void clk_disable(struct clk *clk) -{ - unsigned long flags; - - if (IS_ERR(clk) || clk == NULL) - return; - - spin_lock_irqsave(&clocks_lock, flags); - - if ((--clk->usage) == 0) - (clk->enable)(clk, 0); - - spin_unlock_irqrestore(&clocks_lock, flags); - clk_disable(clk->parent); -} - - -unsigned long clk_get_rate(struct clk *clk) -{ - if (IS_ERR_OR_NULL(clk)) - return 0; - - if (clk->rate != 0) - return clk->rate; - - if (clk->ops != NULL && clk->ops->get_rate != NULL) - return (clk->ops->get_rate)(clk); - - if (clk->parent != NULL) - return clk_get_rate(clk->parent); - - return clk->rate; -} - -long clk_round_rate(struct clk *clk, unsigned long rate) -{ - if (!IS_ERR_OR_NULL(clk) && clk->ops && clk->ops->round_rate) - return (clk->ops->round_rate)(clk, rate); - - return rate; -} - -int clk_set_rate(struct clk *clk, unsigned long rate) -{ - unsigned long flags; - int ret; - - if (IS_ERR_OR_NULL(clk)) - return -EINVAL; - - /* We do not default just do a clk->rate = rate as - * the clock may have been made this way by choice. - */ - - WARN_ON(clk->ops == NULL); - WARN_ON(clk->ops && clk->ops->set_rate == NULL); - - if (clk->ops == NULL || clk->ops->set_rate == NULL) - return -EINVAL; - - spin_lock_irqsave(&clocks_lock, flags); - ret = (clk->ops->set_rate)(clk, rate); - spin_unlock_irqrestore(&clocks_lock, flags); - - return ret; -} - -struct clk *clk_get_parent(struct clk *clk) -{ - return clk->parent; -} - -int clk_set_parent(struct clk *clk, struct clk *parent) -{ - unsigned long flags; - int ret = 0; - - if (IS_ERR_OR_NULL(clk) || IS_ERR_OR_NULL(parent)) - return -EINVAL; - - spin_lock_irqsave(&clocks_lock, flags); - - if (clk->ops && clk->ops->set_parent) - ret = (clk->ops->set_parent)(clk, parent); - - spin_unlock_irqrestore(&clocks_lock, flags); - - return ret; -} - -EXPORT_SYMBOL(clk_enable); -EXPORT_SYMBOL(clk_disable); -EXPORT_SYMBOL(clk_get_rate); -EXPORT_SYMBOL(clk_round_rate); -EXPORT_SYMBOL(clk_set_rate); -EXPORT_SYMBOL(clk_get_parent); -EXPORT_SYMBOL(clk_set_parent); - -/* base clocks */ - -int clk_default_setrate(struct clk *clk, unsigned long rate) -{ - clk->rate = rate; - return 0; -} - -struct clk_ops clk_ops_def_setrate = { - .set_rate = clk_default_setrate, -}; - -struct clk clk_xtal = { - .name = "xtal", - .rate = 0, - .parent = NULL, - .ctrlbit = 0, -}; - -struct clk clk_ext = { - .name = "ext", -}; - -struct clk clk_epll = { - .name = "epll", -}; - -struct clk clk_mpll = { - .name = "mpll", - .ops = &clk_ops_def_setrate, -}; - -struct clk clk_upll = { - .name = "upll", - .parent = NULL, - .ctrlbit = 0, -}; - -struct clk clk_f = { - .name = "fclk", - .rate = 0, - .parent = &clk_mpll, - .ctrlbit = 0, -}; - -struct clk clk_h = { - .name = "hclk", - .rate = 0, - .parent = NULL, - .ctrlbit = 0, - .ops = &clk_ops_def_setrate, -}; - -struct clk clk_p = { - .name = "pclk", - .rate = 0, - .parent = NULL, - .ctrlbit = 0, - .ops = &clk_ops_def_setrate, -}; - -struct clk clk_usb_bus = { - .name = "usb-bus", - .rate = 0, - .parent = &clk_upll, -}; - - -struct clk s3c24xx_uclk = { - .name = "uclk", -}; - -/* initialise the clock system */ - -/** - * s3c24xx_register_clock() - register a clock - * @clk: The clock to register - * - * Add the specified clock to the list of clocks known by the system. - */ -int s3c24xx_register_clock(struct clk *clk) -{ - if (clk->enable == NULL) - clk->enable = clk_null_enable; - - /* fill up the clk_lookup structure and register it*/ - clk->lookup.dev_id = clk->devname; - clk->lookup.con_id = clk->name; - clk->lookup.clk = clk; - clkdev_add(&clk->lookup); - - return 0; -} - -/** - * s3c24xx_register_clocks() - register an array of clock pointers - * @clks: Pointer to an array of struct clk pointers - * @nr_clks: The number of clocks in the @clks array. - * - * Call s3c24xx_register_clock() for all the clock pointers contained - * in the @clks list. Returns the number of failures. - */ -int s3c24xx_register_clocks(struct clk **clks, int nr_clks) -{ - int fails = 0; - - for (; nr_clks > 0; nr_clks--, clks++) { - if (s3c24xx_register_clock(*clks) < 0) { - struct clk *clk = *clks; - printk(KERN_ERR "%s: failed to register %p: %s\n", - __func__, clk, clk->name); - fails++; - } - } - - return fails; -} - -/** - * s3c_register_clocks() - register an array of clocks - * @clkp: Pointer to the first clock in the array. - * @nr_clks: Number of clocks to register. - * - * Call s3c24xx_register_clock() on the @clkp array given, printing an - * error if it fails to register the clock (unlikely). - */ -void __init s3c_register_clocks(struct clk *clkp, int nr_clks) -{ - int ret; - - for (; nr_clks > 0; nr_clks--, clkp++) { - ret = s3c24xx_register_clock(clkp); - - if (ret < 0) { - printk(KERN_ERR "Failed to register clock %s (%d)\n", - clkp->name, ret); - } - } -} - -/** - * s3c_disable_clocks() - disable an array of clocks - * @clkp: Pointer to the first clock in the array. - * @nr_clks: Number of clocks to register. - * - * for internal use only at initialisation time. disable the clocks in the - * @clkp array. - */ - -void __init s3c_disable_clocks(struct clk *clkp, int nr_clks) -{ - for (; nr_clks > 0; nr_clks--, clkp++) - (clkp->enable)(clkp, 0); -} - -/* initialise all the clocks */ - -int __init s3c24xx_register_baseclocks(unsigned long xtal) -{ - printk(KERN_INFO "S3C24XX Clocks, Copyright 2004 Simtec Electronics\n"); - - clk_xtal.rate = xtal; - - /* register our clocks */ - - if (s3c24xx_register_clock(&clk_xtal) < 0) - printk(KERN_ERR "failed to register master xtal\n"); - - if (s3c24xx_register_clock(&clk_mpll) < 0) - printk(KERN_ERR "failed to register mpll clock\n"); - - if (s3c24xx_register_clock(&clk_upll) < 0) - printk(KERN_ERR "failed to register upll clock\n"); - - if (s3c24xx_register_clock(&clk_f) < 0) - printk(KERN_ERR "failed to register cpu fclk\n"); - - if (s3c24xx_register_clock(&clk_h) < 0) - printk(KERN_ERR "failed to register cpu hclk\n"); - - if (s3c24xx_register_clock(&clk_p) < 0) - printk(KERN_ERR "failed to register cpu pclk\n"); - - return 0; -} - -#if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS) -/* debugfs support to trace clock tree hierarchy and attributes */ - -static struct dentry *clk_debugfs_root; - -static void clock_tree_show_one(struct seq_file *s, struct clk *c, int level) -{ - struct clk *child; - const char *state; - char buf[255] = { 0 }; - int n = 0; - - if (c->name) - n = snprintf(buf, sizeof(buf) - 1, "%s", c->name); - - if (c->devname) - n += snprintf(buf + n, sizeof(buf) - 1 - n, ":%s", c->devname); - - state = (c->usage > 0) ? "on" : "off"; - - seq_printf(s, "%*s%-*s %-6s %-3d %-10lu\n", - level * 3 + 1, "", - 50 - level * 3, buf, - state, c->usage, clk_get_rate(c)); - - list_for_each_entry(child, &clocks, list) { - if (child->parent != c) - continue; - - clock_tree_show_one(s, child, level + 1); - } -} - -static int clock_tree_show(struct seq_file *s, void *data) -{ - struct clk *c; - unsigned long flags; - - seq_printf(s, " clock state ref rate\n"); - seq_printf(s, "----------------------------------------------------\n"); - - spin_lock_irqsave(&clocks_lock, flags); - - list_for_each_entry(c, &clocks, list) - if (c->parent == NULL) - clock_tree_show_one(s, c, 0); - - spin_unlock_irqrestore(&clocks_lock, flags); - return 0; -} - -static int clock_tree_open(struct inode *inode, struct file *file) -{ - return single_open(file, clock_tree_show, inode->i_private); -} - -static const struct file_operations clock_tree_fops = { - .open = clock_tree_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static int clock_rate_show(void *data, u64 *val) -{ - struct clk *c = data; - *val = clk_get_rate(c); - return 0; -} -DEFINE_SIMPLE_ATTRIBUTE(clock_rate_fops, clock_rate_show, NULL, "%llu\n"); - -static int clk_debugfs_register_one(struct clk *c) -{ - int err; - struct dentry *d; - struct clk *pa = c->parent; - char s[255]; - char *p = s; - - p += sprintf(p, "%s", c->devname); - - d = debugfs_create_dir(s, pa ? pa->dent : clk_debugfs_root); - if (!d) - return -ENOMEM; - - c->dent = d; - - d = debugfs_create_u8("usecount", S_IRUGO, c->dent, (u8 *)&c->usage); - if (!d) { - err = -ENOMEM; - goto err_out; - } - - d = debugfs_create_file("rate", S_IRUGO, c->dent, c, &clock_rate_fops); - if (!d) { - err = -ENOMEM; - goto err_out; - } - return 0; - -err_out: - debugfs_remove_recursive(c->dent); - return err; -} - -static int clk_debugfs_register(struct clk *c) -{ - int err; - struct clk *pa = c->parent; - - if (pa && !pa->dent) { - err = clk_debugfs_register(pa); - if (err) - return err; - } - - if (!c->dent) { - err = clk_debugfs_register_one(c); - if (err) - return err; - } - return 0; -} - -static int __init clk_debugfs_init(void) -{ - struct clk *c; - struct dentry *d; - int err = -ENOMEM; - - d = debugfs_create_dir("clock", NULL); - if (!d) - return -ENOMEM; - clk_debugfs_root = d; - - d = debugfs_create_file("clock_tree", S_IRUGO, clk_debugfs_root, NULL, - &clock_tree_fops); - if (!d) - goto err_out; - - list_for_each_entry(c, &clocks, list) { - err = clk_debugfs_register(c); - if (err) - goto err_out; - } - return 0; - -err_out: - debugfs_remove_recursive(clk_debugfs_root); - return err; -} -late_initcall(clk_debugfs_init); - -#endif /* defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS) */ |