diff options
author | Ben Dooks <ben-linux@fluff.org> | 2009-12-23 18:43:48 +0000 |
---|---|---|
committer | Ben Dooks <ben-linux@fluff.org> | 2010-01-15 17:10:11 +0900 |
commit | 2c2f69b15d5420291a941ace10149e76f0af7ab0 (patch) | |
tree | d2e8725f81cc0b877658dd828a7f40d45f88df01 /arch/arm/plat-s3c | |
parent | 682e2b7d45878586ce84f6993da0b8a2981a399d (diff) |
ARM: SAMSUNG: Move clock.c to arch/arm/plat-samsung
This is the core implementation of the clock code for all Samsung based
SoCs, so move it to arch/arm/plat-samsung (the clock.h file has already
been moved).
Since the file is built for every Samsung SoC, no changes are needed to the
Kconfig system.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Diffstat (limited to 'arch/arm/plat-s3c')
-rw-r--r-- | arch/arm/plat-s3c/Makefile | 3 | ||||
-rw-r--r-- | arch/arm/plat-s3c/clock.c | 369 |
2 files changed, 1 insertions, 371 deletions
diff --git a/arch/arm/plat-s3c/Makefile b/arch/arm/plat-s3c/Makefile index 50444da98425..99f91ad1d555 100644 --- a/arch/arm/plat-s3c/Makefile +++ b/arch/arm/plat-s3c/Makefile @@ -11,9 +11,8 @@ obj- := # Core support for all Samsung SoCs -obj-y += init.o +obj-y += init.o obj-y += time.o -obj-y += clock.o obj-y += pwm-clock.o obj-y += gpio.o obj-y += gpio-config.o diff --git a/arch/arm/plat-s3c/clock.c b/arch/arm/plat-s3c/clock.c deleted file mode 100644 index fa91125c7e0e..000000000000 --- a/arch/arm/plat-s3c/clock.c +++ /dev/null @@ -1,369 +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/sysdev.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/clk.h> -#include <linux/spinlock.h> -#include <linux/io.h> - -#include <mach/hardware.h> -#include <asm/irq.h> - -#include <plat/cpu-freq.h> - -#include <plat/clock.h> -#include <plat/cpu.h> - -/* 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); - -/* enable and disable calls for use with the clk struct */ - -static int clk_null_enable(struct clk *clk, int enable) -{ - return 0; -} - -/* Clock API calls */ - -struct clk *clk_get(struct device *dev, const char *id) -{ - struct clk *p; - struct clk *clk = ERR_PTR(-ENOENT); - int idno; - - if (dev == NULL || dev->bus != &platform_bus_type) - idno = -1; - else - idno = to_platform_device(dev)->id; - - spin_lock(&clocks_lock); - - list_for_each_entry(p, &clocks, list) { - if (p->id == idno && - strcmp(id, p->name) == 0 && - try_module_get(p->owner)) { - clk = p; - break; - } - } - - /* check for the case where a device was supplied, but the - * clock that was being searched for is not device specific */ - - if (IS_ERR(clk)) { - list_for_each_entry(p, &clocks, list) { - if (p->id == -1 && strcmp(id, p->name) == 0 && - try_module_get(p->owner)) { - clk = p; - break; - } - } - } - - spin_unlock(&clocks_lock); - return clk; -} - -void clk_put(struct clk *clk) -{ - module_put(clk->owner); -} - -int clk_enable(struct clk *clk) -{ - if (IS_ERR(clk) || clk == NULL) - return -EINVAL; - - clk_enable(clk->parent); - - spin_lock(&clocks_lock); - - if ((clk->usage++) == 0) - (clk->enable)(clk, 1); - - spin_unlock(&clocks_lock); - return 0; -} - -void clk_disable(struct clk *clk) -{ - if (IS_ERR(clk) || clk == NULL) - return; - - spin_lock(&clocks_lock); - - if ((--clk->usage) == 0) - (clk->enable)(clk, 0); - - spin_unlock(&clocks_lock); - clk_disable(clk->parent); -} - - -unsigned long clk_get_rate(struct clk *clk) -{ - if (IS_ERR(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(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) -{ - int ret; - - if (IS_ERR(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(&clocks_lock); - ret = (clk->ops->set_rate)(clk, rate); - spin_unlock(&clocks_lock); - - return ret; -} - -struct clk *clk_get_parent(struct clk *clk) -{ - return clk->parent; -} - -int clk_set_parent(struct clk *clk, struct clk *parent) -{ - int ret = 0; - - if (IS_ERR(clk)) - return -EINVAL; - - spin_lock(&clocks_lock); - - if (clk->ops && clk->ops->set_parent) - ret = (clk->ops->set_parent)(clk, parent); - - spin_unlock(&clocks_lock); - - return ret; -} - -EXPORT_SYMBOL(clk_get); -EXPORT_SYMBOL(clk_put); -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 */ - -static int clk_default_setrate(struct clk *clk, unsigned long rate) -{ - clk->rate = rate; - return 0; -} - -static struct clk_ops clk_ops_def_setrate = { - .set_rate = clk_default_setrate, -}; - -struct clk clk_xtal = { - .name = "xtal", - .id = -1, - .rate = 0, - .parent = NULL, - .ctrlbit = 0, -}; - -struct clk clk_ext = { - .name = "ext", - .id = -1, -}; - -struct clk clk_epll = { - .name = "epll", - .id = -1, -}; - -struct clk clk_mpll = { - .name = "mpll", - .id = -1, - .ops = &clk_ops_def_setrate, -}; - -struct clk clk_upll = { - .name = "upll", - .id = -1, - .parent = NULL, - .ctrlbit = 0, -}; - -struct clk clk_f = { - .name = "fclk", - .id = -1, - .rate = 0, - .parent = &clk_mpll, - .ctrlbit = 0, -}; - -struct clk clk_h = { - .name = "hclk", - .id = -1, - .rate = 0, - .parent = NULL, - .ctrlbit = 0, - .ops = &clk_ops_def_setrate, -}; - -struct clk clk_p = { - .name = "pclk", - .id = -1, - .rate = 0, - .parent = NULL, - .ctrlbit = 0, - .ops = &clk_ops_def_setrate, -}; - -struct clk clk_usb_bus = { - .name = "usb-bus", - .id = -1, - .rate = 0, - .parent = &clk_upll, -}; - - -struct clk s3c24xx_uclk = { - .name = "uclk", - .id = -1, -}; - -/* initialise the clock system */ - -int s3c24xx_register_clock(struct clk *clk) -{ - if (clk->enable == NULL) - clk->enable = clk_null_enable; - - /* add to the list of available clocks */ - - /* Quick check to see if this clock has already been registered. */ - BUG_ON(clk->list.prev != clk->list.next); - - spin_lock(&clocks_lock); - list_add(&clk->list, &clocks); - spin_unlock(&clocks_lock); - - return 0; -} - -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) - fails++; - } - - return fails; -} - -/* initalise 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; -} - |