ARM: tegra: clock: Drop CPU dvfs
The existing version did not extend well to core dvfs, drop it
for now until the new clk api with clk_prepare and clk_unprepare
is ready and non-atomic clocks are possible.
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Colin Cross <ccross@android.com>
diff --git a/arch/arm/mach-tegra/clock.c b/arch/arm/mach-tegra/clock.c
index 92bcc207..8fd96bfb 100644
--- a/arch/arm/mach-tegra/clock.c
+++ b/arch/arm/mach-tegra/clock.c
@@ -24,81 +24,14 @@
#include <linux/debugfs.h>
#include <linux/slab.h>
#include <linux/seq_file.h>
-#include <linux/regulator/consumer.h>
#include <linux/clkdev.h>
-#include "clock.h"
#include "board.h"
-#include "fuse.h"
+#include "clock.h"
static LIST_HEAD(clocks);
static DEFINE_SPINLOCK(clock_lock);
-static DEFINE_MUTEX(dvfs_lock);
-
-static int clk_is_dvfs(struct clk *c)
-{
- return (c->dvfs != NULL);
-};
-
-static int dvfs_set_rate(struct dvfs *d, unsigned long rate)
-{
- struct dvfs_table *t;
-
- if (d->table == NULL)
- return -ENODEV;
-
- for (t = d->table; t->rate != 0; t++) {
- if (rate <= t->rate) {
- if (!d->reg)
- return 0;
-
- return regulator_set_voltage(d->reg,
- t->millivolts * 1000,
- d->max_millivolts * 1000);
- }
- }
-
- return -EINVAL;
-}
-
-static void dvfs_init(struct clk *c)
-{
- int process_id;
- int i;
- struct dvfs_table *table;
-
- process_id = c->dvfs->cpu ? tegra_core_process_id() :
- tegra_cpu_process_id();
-
- for (i = 0; i < c->dvfs->process_id_table_length; i++)
- if (process_id == c->dvfs->process_id_table[i].process_id)
- c->dvfs->table = c->dvfs->process_id_table[i].table;
-
- if (c->dvfs->table == NULL) {
- pr_err("Failed to find dvfs table for clock %s process %d\n",
- c->name, process_id);
- return;
- }
-
- c->dvfs->max_millivolts = 0;
- for (table = c->dvfs->table; table->rate != 0; table++)
- if (c->dvfs->max_millivolts < table->millivolts)
- c->dvfs->max_millivolts = table->millivolts;
-
- c->dvfs->reg = regulator_get(NULL, c->dvfs->reg_id);
-
- if (IS_ERR(c->dvfs->reg)) {
- pr_err("Failed to get regulator %s for clock %s\n",
- c->dvfs->reg_id, c->name);
- c->dvfs->reg = NULL;
- return;
- }
-
- if (c->refcnt > 0)
- dvfs_set_rate(c->dvfs, c->rate);
-}
-
struct clk *tegra_get_clock_by_name(const char *name)
{
struct clk *c;
@@ -214,34 +147,11 @@
return 0;
}
-int clk_enable_cansleep(struct clk *c)
-{
- int ret;
- unsigned long flags;
-
- mutex_lock(&dvfs_lock);
-
- if (clk_is_dvfs(c) && c->refcnt > 0)
- dvfs_set_rate(c->dvfs, c->rate);
-
- spin_lock_irqsave(&clock_lock, flags);
- ret = clk_enable_locked(c);
- spin_unlock_irqrestore(&clock_lock, flags);
-
- mutex_unlock(&dvfs_lock);
-
- return ret;
-}
-EXPORT_SYMBOL(clk_enable_cansleep);
-
int clk_enable(struct clk *c)
{
int ret;
unsigned long flags;
- if (clk_is_dvfs(c))
- BUG();
-
spin_lock_irqsave(&clock_lock, flags);
ret = clk_enable_locked(c);
spin_unlock_irqrestore(&clock_lock, flags);
@@ -268,30 +178,10 @@
c->refcnt--;
}
-void clk_disable_cansleep(struct clk *c)
-{
- unsigned long flags;
-
- mutex_lock(&dvfs_lock);
-
- spin_lock_irqsave(&clock_lock, flags);
- clk_disable_locked(c);
- spin_unlock_irqrestore(&clock_lock, flags);
-
- if (clk_is_dvfs(c) && c->refcnt == 0)
- dvfs_set_rate(c->dvfs, c->rate);
-
- mutex_unlock(&dvfs_lock);
-}
-EXPORT_SYMBOL(clk_disable_cansleep);
-
void clk_disable(struct clk *c)
{
unsigned long flags;
- if (clk_is_dvfs(c))
- BUG();
-
spin_lock_irqsave(&clock_lock, flags);
clk_disable_locked(c);
spin_unlock_irqrestore(&clock_lock, flags);
@@ -356,41 +246,11 @@
return 0;
}
-int clk_set_rate_cansleep(struct clk *c, unsigned long rate)
-{
- int ret = 0;
- unsigned long flags;
-
- mutex_lock(&dvfs_lock);
-
- if (rate > c->rate)
- ret = dvfs_set_rate(c->dvfs, rate);
- if (ret)
- goto out;
-
- spin_lock_irqsave(&clock_lock, flags);
- ret = clk_set_rate_locked(c, rate);
- spin_unlock_irqrestore(&clock_lock, flags);
-
- if (ret)
- goto out;
-
- ret = dvfs_set_rate(c->dvfs, rate);
-
-out:
- mutex_unlock(&dvfs_lock);
- return ret;
-}
-EXPORT_SYMBOL(clk_set_rate_cansleep);
-
int clk_set_rate(struct clk *c, unsigned long rate)
{
int ret = 0;
unsigned long flags;
- if (clk_is_dvfs(c))
- BUG();
-
spin_lock_irqsave(&clock_lock, flags);
ret = clk_set_rate_locked(c, rate);
spin_unlock_irqrestore(&clock_lock, flags);
@@ -503,23 +363,6 @@
tegra2_init_clocks();
}
-int __init tegra_init_dvfs(void)
-{
- struct clk *c, *safe;
-
- mutex_lock(&dvfs_lock);
-
- list_for_each_entry_safe(c, safe, &clocks, node)
- if (c->dvfs)
- dvfs_init(c);
-
- mutex_unlock(&dvfs_lock);
-
- return 0;
-}
-
-late_initcall(tegra_init_dvfs);
-
#ifdef CONFIG_DEBUG_FS
static struct dentry *clk_debugfs_root;