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Diffstat (limited to 'arch/arm/plat-samsung/clock.c')
-rw-r--r--arch/arm/plat-samsung/clock.c539
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) */
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