summaryrefslogtreecommitdiff
path: root/arch/arm/plat-omap/clock.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/plat-omap/clock.c')
-rw-r--r--arch/arm/plat-omap/clock.c544
1 files changed, 0 insertions, 544 deletions
diff --git a/arch/arm/plat-omap/clock.c b/arch/arm/plat-omap/clock.c
deleted file mode 100644
index 9d7ac20ef8f9..000000000000
--- a/arch/arm/plat-omap/clock.c
+++ /dev/null
@@ -1,544 +0,0 @@
-/*
- * linux/arch/arm/plat-omap/clock.c
- *
- * Copyright (C) 2004 - 2008 Nokia corporation
- * Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
- *
- * Modified for omap shared clock framework by Tony Lindgren <tony@atomide.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/errno.h>
-#include <linux/export.h>
-#include <linux/err.h>
-#include <linux/string.h>
-#include <linux/clk.h>
-#include <linux/mutex.h>
-#include <linux/cpufreq.h>
-#include <linux/io.h>
-
-#include <plat/clock.h>
-
-static LIST_HEAD(clocks);
-static DEFINE_MUTEX(clocks_mutex);
-static DEFINE_SPINLOCK(clockfw_lock);
-
-static struct clk_functions *arch_clock;
-
-/*
- * Standard clock functions defined in include/linux/clk.h
- */
-
-int clk_enable(struct clk *clk)
-{
- unsigned long flags;
- int ret;
-
- if (clk == NULL || IS_ERR(clk))
- return -EINVAL;
-
- if (!arch_clock || !arch_clock->clk_enable)
- return -EINVAL;
-
- spin_lock_irqsave(&clockfw_lock, flags);
- ret = arch_clock->clk_enable(clk);
- spin_unlock_irqrestore(&clockfw_lock, flags);
-
- return ret;
-}
-EXPORT_SYMBOL(clk_enable);
-
-void clk_disable(struct clk *clk)
-{
- unsigned long flags;
-
- if (clk == NULL || IS_ERR(clk))
- return;
-
- if (!arch_clock || !arch_clock->clk_disable)
- return;
-
- spin_lock_irqsave(&clockfw_lock, flags);
- if (clk->usecount == 0) {
- pr_err("Trying disable clock %s with 0 usecount\n",
- clk->name);
- WARN_ON(1);
- goto out;
- }
-
- arch_clock->clk_disable(clk);
-
-out:
- spin_unlock_irqrestore(&clockfw_lock, flags);
-}
-EXPORT_SYMBOL(clk_disable);
-
-unsigned long clk_get_rate(struct clk *clk)
-{
- unsigned long flags;
- unsigned long ret;
-
- if (clk == NULL || IS_ERR(clk))
- return 0;
-
- spin_lock_irqsave(&clockfw_lock, flags);
- ret = clk->rate;
- spin_unlock_irqrestore(&clockfw_lock, flags);
-
- return ret;
-}
-EXPORT_SYMBOL(clk_get_rate);
-
-/*
- * Optional clock functions defined in include/linux/clk.h
- */
-
-long clk_round_rate(struct clk *clk, unsigned long rate)
-{
- unsigned long flags;
- long ret;
-
- if (clk == NULL || IS_ERR(clk))
- return 0;
-
- if (!arch_clock || !arch_clock->clk_round_rate)
- return 0;
-
- spin_lock_irqsave(&clockfw_lock, flags);
- ret = arch_clock->clk_round_rate(clk, rate);
- spin_unlock_irqrestore(&clockfw_lock, flags);
-
- return ret;
-}
-EXPORT_SYMBOL(clk_round_rate);
-
-int clk_set_rate(struct clk *clk, unsigned long rate)
-{
- unsigned long flags;
- int ret = -EINVAL;
-
- if (clk == NULL || IS_ERR(clk))
- return ret;
-
- if (!arch_clock || !arch_clock->clk_set_rate)
- return ret;
-
- spin_lock_irqsave(&clockfw_lock, flags);
- ret = arch_clock->clk_set_rate(clk, rate);
- if (ret == 0)
- propagate_rate(clk);
- spin_unlock_irqrestore(&clockfw_lock, flags);
-
- return ret;
-}
-EXPORT_SYMBOL(clk_set_rate);
-
-int clk_set_parent(struct clk *clk, struct clk *parent)
-{
- unsigned long flags;
- int ret = -EINVAL;
-
- if (clk == NULL || IS_ERR(clk) || parent == NULL || IS_ERR(parent))
- return ret;
-
- if (!arch_clock || !arch_clock->clk_set_parent)
- return ret;
-
- spin_lock_irqsave(&clockfw_lock, flags);
- if (clk->usecount == 0) {
- ret = arch_clock->clk_set_parent(clk, parent);
- if (ret == 0)
- propagate_rate(clk);
- } else
- ret = -EBUSY;
- spin_unlock_irqrestore(&clockfw_lock, flags);
-
- return ret;
-}
-EXPORT_SYMBOL(clk_set_parent);
-
-struct clk *clk_get_parent(struct clk *clk)
-{
- return clk->parent;
-}
-EXPORT_SYMBOL(clk_get_parent);
-
-/*
- * OMAP specific clock functions shared between omap1 and omap2
- */
-
-int __initdata mpurate;
-
-/*
- * By default we use the rate set by the bootloader.
- * You can override this with mpurate= cmdline option.
- */
-static int __init omap_clk_setup(char *str)
-{
- get_option(&str, &mpurate);
-
- if (!mpurate)
- return 1;
-
- if (mpurate < 1000)
- mpurate *= 1000000;
-
- return 1;
-}
-__setup("mpurate=", omap_clk_setup);
-
-/* Used for clocks that always have same value as the parent clock */
-unsigned long followparent_recalc(struct clk *clk)
-{
- return clk->parent->rate;
-}
-
-/*
- * Used for clocks that have the same value as the parent clock,
- * divided by some factor
- */
-unsigned long omap_fixed_divisor_recalc(struct clk *clk)
-{
- WARN_ON(!clk->fixed_div);
-
- return clk->parent->rate / clk->fixed_div;
-}
-
-void clk_reparent(struct clk *child, struct clk *parent)
-{
- list_del_init(&child->sibling);
- if (parent)
- list_add(&child->sibling, &parent->children);
- child->parent = parent;
-
- /* now do the debugfs renaming to reattach the child
- to the proper parent */
-}
-
-/* Propagate rate to children */
-void propagate_rate(struct clk *tclk)
-{
- struct clk *clkp;
-
- list_for_each_entry(clkp, &tclk->children, sibling) {
- if (clkp->recalc)
- clkp->rate = clkp->recalc(clkp);
- propagate_rate(clkp);
- }
-}
-
-static LIST_HEAD(root_clks);
-
-/**
- * recalculate_root_clocks - recalculate and propagate all root clocks
- *
- * Recalculates all root clocks (clocks with no parent), which if the
- * clock's .recalc is set correctly, should also propagate their rates.
- * Called at init.
- */
-void recalculate_root_clocks(void)
-{
- struct clk *clkp;
-
- list_for_each_entry(clkp, &root_clks, sibling) {
- if (clkp->recalc)
- clkp->rate = clkp->recalc(clkp);
- propagate_rate(clkp);
- }
-}
-
-/**
- * clk_preinit - initialize any fields in the struct clk before clk init
- * @clk: struct clk * to initialize
- *
- * Initialize any struct clk fields needed before normal clk initialization
- * can run. No return value.
- */
-void clk_preinit(struct clk *clk)
-{
- INIT_LIST_HEAD(&clk->children);
-}
-
-int clk_register(struct clk *clk)
-{
- if (clk == NULL || IS_ERR(clk))
- return -EINVAL;
-
- /*
- * trap out already registered clocks
- */
- if (clk->node.next || clk->node.prev)
- return 0;
-
- mutex_lock(&clocks_mutex);
- if (clk->parent)
- list_add(&clk->sibling, &clk->parent->children);
- else
- list_add(&clk->sibling, &root_clks);
-
- list_add(&clk->node, &clocks);
- if (clk->init)
- clk->init(clk);
- mutex_unlock(&clocks_mutex);
-
- return 0;
-}
-EXPORT_SYMBOL(clk_register);
-
-void clk_unregister(struct clk *clk)
-{
- if (clk == NULL || IS_ERR(clk))
- return;
-
- mutex_lock(&clocks_mutex);
- list_del(&clk->sibling);
- list_del(&clk->node);
- mutex_unlock(&clocks_mutex);
-}
-EXPORT_SYMBOL(clk_unregister);
-
-void clk_enable_init_clocks(void)
-{
- struct clk *clkp;
-
- list_for_each_entry(clkp, &clocks, node) {
- if (clkp->flags & ENABLE_ON_INIT)
- clk_enable(clkp);
- }
-}
-
-int omap_clk_enable_autoidle_all(void)
-{
- struct clk *c;
- unsigned long flags;
-
- spin_lock_irqsave(&clockfw_lock, flags);
-
- list_for_each_entry(c, &clocks, node)
- if (c->ops->allow_idle)
- c->ops->allow_idle(c);
-
- spin_unlock_irqrestore(&clockfw_lock, flags);
-
- return 0;
-}
-
-int omap_clk_disable_autoidle_all(void)
-{
- struct clk *c;
- unsigned long flags;
-
- spin_lock_irqsave(&clockfw_lock, flags);
-
- list_for_each_entry(c, &clocks, node)
- if (c->ops->deny_idle)
- c->ops->deny_idle(c);
-
- spin_unlock_irqrestore(&clockfw_lock, flags);
-
- return 0;
-}
-
-/*
- * Low level helpers
- */
-static int clkll_enable_null(struct clk *clk)
-{
- return 0;
-}
-
-static void clkll_disable_null(struct clk *clk)
-{
-}
-
-const struct clkops clkops_null = {
- .enable = clkll_enable_null,
- .disable = clkll_disable_null,
-};
-
-/*
- * Dummy clock
- *
- * Used for clock aliases that are needed on some OMAPs, but not others
- */
-struct clk dummy_ck = {
- .name = "dummy",
- .ops = &clkops_null,
-};
-
-/*
- *
- */
-
-#ifdef CONFIG_OMAP_RESET_CLOCKS
-/*
- * Disable any unused clocks left on by the bootloader
- */
-static int __init clk_disable_unused(void)
-{
- struct clk *ck;
- unsigned long flags;
-
- if (!arch_clock || !arch_clock->clk_disable_unused)
- return 0;
-
- pr_info("clock: disabling unused clocks to save power\n");
-
- spin_lock_irqsave(&clockfw_lock, flags);
- list_for_each_entry(ck, &clocks, node) {
- if (ck->ops == &clkops_null)
- continue;
-
- if (ck->usecount > 0 || !ck->enable_reg)
- continue;
-
- arch_clock->clk_disable_unused(ck);
- }
- spin_unlock_irqrestore(&clockfw_lock, flags);
-
- return 0;
-}
-late_initcall(clk_disable_unused);
-late_initcall(omap_clk_enable_autoidle_all);
-#endif
-
-int __init clk_init(struct clk_functions * custom_clocks)
-{
- if (!custom_clocks) {
- pr_err("No custom clock functions registered\n");
- BUG();
- }
-
- arch_clock = custom_clocks;
-
- return 0;
-}
-
-#if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS)
-/*
- * debugfs support to trace clock tree hierarchy and attributes
- */
-
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
-
-static struct dentry *clk_debugfs_root;
-
-static int clk_dbg_show_summary(struct seq_file *s, void *unused)
-{
- struct clk *c;
- struct clk *pa;
-
- mutex_lock(&clocks_mutex);
- seq_printf(s, "%-30s %-30s %-10s %s\n",
- "clock-name", "parent-name", "rate", "use-count");
-
- list_for_each_entry(c, &clocks, node) {
- pa = c->parent;
- seq_printf(s, "%-30s %-30s %-10lu %d\n",
- c->name, pa ? pa->name : "none", c->rate, c->usecount);
- }
- mutex_unlock(&clocks_mutex);
-
- return 0;
-}
-
-static int clk_dbg_open(struct inode *inode, struct file *file)
-{
- return single_open(file, clk_dbg_show_summary, inode->i_private);
-}
-
-static const struct file_operations debug_clock_fops = {
- .open = clk_dbg_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int clk_debugfs_register_one(struct clk *c)
-{
- int err;
- struct dentry *d;
- struct clk *pa = c->parent;
-
- d = debugfs_create_dir(c->name, pa ? pa->dent : clk_debugfs_root);
- if (!d)
- return -ENOMEM;
- c->dent = d;
-
- d = debugfs_create_u8("usecount", S_IRUGO, c->dent, (u8 *)&c->usecount);
- if (!d) {
- err = -ENOMEM;
- goto err_out;
- }
- d = debugfs_create_u32("rate", S_IRUGO, c->dent, (u32 *)&c->rate);
- if (!d) {
- err = -ENOMEM;
- goto err_out;
- }
- d = debugfs_create_x32("flags", S_IRUGO, c->dent, (u32 *)&c->flags);
- 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;
-
- d = debugfs_create_dir("clock", NULL);
- if (!d)
- return -ENOMEM;
- clk_debugfs_root = d;
-
- list_for_each_entry(c, &clocks, node) {
- err = clk_debugfs_register(c);
- if (err)
- goto err_out;
- }
-
- d = debugfs_create_file("summary", S_IRUGO,
- d, NULL, &debug_clock_fops);
- if (!d)
- return -ENOMEM;
-
- 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) */