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ARM: tegra: switch to the common clock framework 

This branch contains a few bug-fixes, followed by a conversion of Tegra's
 clock driver to the common clock framework, followed by various bug fixes
 found after the conversion.
 
 This branch depends on v3.6-rc4.
 
 This branch is a dependency for a few later pull requests.
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Merge tag 'tegra-for-3.7-common-clk' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into next/soc

From Stephen Warren:

ARM: tegra: switch to the common clock framework

This branch contains a few bug-fixes, followed by a conversion of Tegra's
clock driver to the common clock framework, followed by various bug fixes
found after the conversion.

* tag 'tegra-for-3.7-common-clk' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra:
  ARM: Tegra: Add smp_twd clock for Tegra20
  ARM: tegra: cpu-tegra: explicitly manage re-parenting
  ARM: tegra: fix overflow in tegra20_pll_clk_round_rate()
  ARM: tegra: Fix data type for io address
  ARM: tegra: remove tegra_timer from tegra_list_clks
  ARM: tegra30: clocks: fix the wrong tegra_audio_sync_clk_ops name
  ARM: tegra: clocks: separate tegra_clk_32k_ops from Tegra20 and Tegra30
  ARM: tegra: Remove duplicate code
  ARM: tegra: Port tegra to generic clock framework
  ARM: tegra: Add clk_tegra structure and helper functions
  ARM: tegra: Rename tegra20 clock file
  ARM: tegra20: Separate out clk ops and clk data
  ARM: tegra30: Separate out clk ops and clk data
  ARM: tegra: fix U16 divider range check
  ARM: tegra: turn on UART A clock at boot
This commit is contained in:
Olof Johansson 2012-09-16 18:25:15 -07:00
Родитель 26a806c064 b4350f40f7
Коммит ea2abb670b
15 изменённых файлов: 5098 добавлений и 4776 удалений
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1
arch/arm/Kconfig
Просмотреть файл

@ -686,6 +686,7 @@ config ARCH_TEGRA
select NEED_MACH_IO_H if PCI
select ARCH_HAS_CPUFREQ
select USE_OF
select COMMON_CLK
help
This enables support for NVIDIA Tegra based systems (Tegra APX,
Tegra 6xx and Tegra 2 series).

4
arch/arm/mach-tegra/Makefile
Просмотреть файл

@ -12,9 +12,11 @@ obj-y += powergate.o
obj-y += apbio.o
obj-$(CONFIG_CPU_IDLE) += cpuidle.o
obj-$(CONFIG_CPU_IDLE) += sleep.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra2_clocks.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra20_clocks.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra20_clocks_data.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra2_emc.o
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += tegra30_clocks.o
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += tegra30_clocks_data.o
obj-$(CONFIG_SMP) += platsmp.o headsmp.o
obj-$(CONFIG_SMP) += reset.o
obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o

1
arch/arm/mach-tegra/board-dt-tegra20.c
Просмотреть файл

@ -71,6 +71,7 @@ struct of_dev_auxdata tegra20_auxdata_lookup[] __initdata = {
static __initdata struct tegra_clk_init_table tegra_dt_clk_init_table[] = {
/* name parent rate enabled */
{ "uarta", "pll_p", 216000000, true },
{ "uartd", "pll_p", 216000000, true },
{ "usbd", "clk_m", 12000000, false },
{ "usb2", "clk_m", 12000000, false },

572
arch/arm/mach-tegra/clock.c
Просмотреть файл

@ -1,6 +1,7 @@
/*
*
* Copyright (C) 2010 Google, Inc.
* Copyright (c) 2012 NVIDIA CORPORATION. All rights reserved.
*
* Author:
* Colin Cross <ccross@google.com>
@ -19,8 +20,6 @@
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/module.h>
@ -36,40 +35,30 @@
/*
* Locking:
*
* Each struct clk has a spinlock.
*
* To avoid AB-BA locking problems, locks must always be traversed from child
* clock to parent clock. For example, when enabling a clock, the clock's lock
* is taken, and then clk_enable is called on the parent, which take's the
* parent clock's lock. There is one exceptions to this ordering: When dumping
* the clock tree through debugfs. In this case, clk_lock_all is called,
* which attemps to iterate through the entire list of clocks and take every
* clock lock. If any call to spin_trylock fails, all locked clocks are
* unlocked, and the process is retried. When all the locks are held,
* the only clock operation that can be called is clk_get_rate_all_locked.
*
* Within a single clock, no clock operation can call another clock operation
* on itself, except for clk_get_rate_locked and clk_set_rate_locked. Any
* clock operation can call any other clock operation on any of it's possible
* parents.
*
* An additional mutex, clock_list_lock, is used to protect the list of all
* clocks.
*
* The clock operations must lock internally to protect against
* read-modify-write on registers that are shared by multiple clocks
*/
static DEFINE_MUTEX(clock_list_lock);
static LIST_HEAD(clocks);
void tegra_clk_add(struct clk *clk)
{
struct clk_tegra *c = to_clk_tegra(__clk_get_hw(clk));
mutex_lock(&clock_list_lock);
list_add(&c->node, &clocks);
mutex_unlock(&clock_list_lock);
}
struct clk *tegra_get_clock_by_name(const char *name)
{
struct clk *c;
struct clk_tegra *c;
struct clk *ret = NULL;
mutex_lock(&clock_list_lock);
list_for_each_entry(c, &clocks, node) {
if (strcmp(c->name, name) == 0) {
ret = c;
if (strcmp(__clk_get_name(c->hw.clk), name) == 0) {
ret = c->hw.clk;
break;
}
}
@ -77,280 +66,36 @@ struct clk *tegra_get_clock_by_name(const char *name)
return ret;
}
/* Must be called with c->spinlock held */
static unsigned long clk_predict_rate_from_parent(struct clk *c, struct clk *p)
{
u64 rate;
rate = clk_get_rate(p);
if (c->mul != 0 && c->div != 0) {
rate *= c->mul;
rate += c->div - 1; /* round up */
do_div(rate, c->div);
}
return rate;
}
/* Must be called with c->spinlock held */
unsigned long clk_get_rate_locked(struct clk *c)
{
unsigned long rate;
if (c->parent)
rate = clk_predict_rate_from_parent(c, c->parent);
else
rate = c->rate;
return rate;
}
unsigned long clk_get_rate(struct clk *c)
{
unsigned long flags;
unsigned long rate;
spin_lock_irqsave(&c->spinlock, flags);
rate = clk_get_rate_locked(c);
spin_unlock_irqrestore(&c->spinlock, flags);
return rate;
}
EXPORT_SYMBOL(clk_get_rate);
int clk_reparent(struct clk *c, struct clk *parent)
{
c->parent = parent;
return 0;
}
void clk_init(struct clk *c)
{
spin_lock_init(&c->spinlock);
if (c->ops && c->ops->init)
c->ops->init(c);
if (!c->ops || !c->ops->enable) {
c->refcnt++;
c->set = true;
if (c->parent)
c->state = c->parent->state;
else
c->state = ON;
}
mutex_lock(&clock_list_lock);
list_add(&c->node, &clocks);
mutex_unlock(&clock_list_lock);
}
int clk_enable(struct clk *c)
{
int ret = 0;
unsigned long flags;
spin_lock_irqsave(&c->spinlock, flags);
if (c->refcnt == 0) {
if (c->parent) {
ret = clk_enable(c->parent);
if (ret)
goto out;
}
if (c->ops && c->ops->enable) {
ret = c->ops->enable(c);
if (ret) {
if (c->parent)
clk_disable(c->parent);
goto out;
}
c->state = ON;
c->set = true;
}
}
c->refcnt++;
out:
spin_unlock_irqrestore(&c->spinlock, flags);
return ret;
}
EXPORT_SYMBOL(clk_enable);
void clk_disable(struct clk *c)
{
unsigned long flags;
spin_lock_irqsave(&c->spinlock, flags);
if (c->refcnt == 0) {
WARN(1, "Attempting to disable clock %s with refcnt 0", c->name);
spin_unlock_irqrestore(&c->spinlock, flags);
return;
}
if (c->refcnt == 1) {
if (c->ops && c->ops->disable)
c->ops->disable(c);
if (c->parent)
clk_disable(c->parent);
c->state = OFF;
}
c->refcnt--;
spin_unlock_irqrestore(&c->spinlock, flags);
}
EXPORT_SYMBOL(clk_disable);
int clk_set_parent(struct clk *c, struct clk *parent)
{
int ret;
unsigned long flags;
unsigned long new_rate;
unsigned long old_rate;
spin_lock_irqsave(&c->spinlock, flags);
if (!c->ops || !c->ops->set_parent) {
ret = -ENOSYS;
goto out;
}
new_rate = clk_predict_rate_from_parent(c, parent);
old_rate = clk_get_rate_locked(c);
ret = c->ops->set_parent(c, parent);
if (ret)
goto out;
out:
spin_unlock_irqrestore(&c->spinlock, flags);
return ret;
}
EXPORT_SYMBOL(clk_set_parent);
struct clk *clk_get_parent(struct clk *c)
{
return c->parent;
}
EXPORT_SYMBOL(clk_get_parent);
int clk_set_rate_locked(struct clk *c, unsigned long rate)
{
long new_rate;
if (!c->ops || !c->ops->set_rate)
return -ENOSYS;
if (rate > c->max_rate)
rate = c->max_rate;
if (c->ops && c->ops->round_rate) {
new_rate = c->ops->round_rate(c, rate);
if (new_rate < 0)
return new_rate;
rate = new_rate;
}
return c->ops->set_rate(c, rate);
}
int clk_set_rate(struct clk *c, unsigned long rate)
{
int ret;
unsigned long flags;
spin_lock_irqsave(&c->spinlock, flags);
ret = clk_set_rate_locked(c, rate);
spin_unlock_irqrestore(&c->spinlock, flags);
return ret;
}
EXPORT_SYMBOL(clk_set_rate);
/* Must be called with clocks lock and all indvidual clock locks held */
unsigned long clk_get_rate_all_locked(struct clk *c)
{
u64 rate;
int mul = 1;
int div = 1;
struct clk *p = c;
while (p) {
c = p;
if (c->mul != 0 && c->div != 0) {
mul *= c->mul;
div *= c->div;
}
p = c->parent;
}
rate = c->rate;
rate *= mul;
do_div(rate, div);
return rate;
}
long clk_round_rate(struct clk *c, unsigned long rate)
{
unsigned long flags;
long ret;
spin_lock_irqsave(&c->spinlock, flags);
if (!c->ops || !c->ops->round_rate) {
ret = -ENOSYS;
goto out;
}
if (rate > c->max_rate)
rate = c->max_rate;
ret = c->ops->round_rate(c, rate);
out:
spin_unlock_irqrestore(&c->spinlock, flags);
return ret;
}
EXPORT_SYMBOL(clk_round_rate);
static int tegra_clk_init_one_from_table(struct tegra_clk_init_table *table)
{
struct clk *c;
struct clk *p;
struct clk *parent;
int ret = 0;
c = tegra_get_clock_by_name(table->name);
if (!c) {
pr_warning("Unable to initialize clock %s\n",
pr_warn("Unable to initialize clock %s\n",
table->name);
return -ENODEV;
}
parent = clk_get_parent(c);
if (table->parent) {
p = tegra_get_clock_by_name(table->parent);
if (!p) {
pr_warning("Unable to find parent %s of clock %s\n",
pr_warn("Unable to find parent %s of clock %s\n",
table->parent, table->name);
return -ENODEV;
}
if (c->parent != p) {
if (parent != p) {
ret = clk_set_parent(c, p);
if (ret) {
pr_warning("Unable to set parent %s of clock %s: %d\n",
pr_warn("Unable to set parent %s of clock %s: %d\n",
table->parent, table->name, ret);
return -EINVAL;
}
@ -360,16 +105,16 @@ static int tegra_clk_init_one_from_table(struct tegra_clk_init_table *table)
if (table->rate && table->rate != clk_get_rate(c)) {
ret = clk_set_rate(c, table->rate);
if (ret) {
pr_warning("Unable to set clock %s to rate %lu: %d\n",
pr_warn("Unable to set clock %s to rate %lu: %d\n",
table->name, table->rate, ret);
return -EINVAL;
}
}
if (table->enabled) {
ret = clk_enable(c);
ret = clk_prepare_enable(c);
if (ret) {
pr_warning("Unable to enable clock %s: %d\n",
pr_warn("Unable to enable clock %s: %d\n",
table->name, ret);
return -EINVAL;
}
@ -383,19 +128,20 @@ void tegra_clk_init_from_table(struct tegra_clk_init_table *table)
for (; table->name; table++)
tegra_clk_init_one_from_table(table);
}
EXPORT_SYMBOL(tegra_clk_init_from_table);
void tegra_periph_reset_deassert(struct clk *c)
{
BUG_ON(!c->ops->reset);
c->ops->reset(c, false);
struct clk_tegra *clk = to_clk_tegra(__clk_get_hw(c));
BUG_ON(!clk->reset);
clk->reset(__clk_get_hw(c), false);
}
EXPORT_SYMBOL(tegra_periph_reset_deassert);
void tegra_periph_reset_assert(struct clk *c)
{
BUG_ON(!c->ops->reset);
c->ops->reset(c, true);
struct clk_tegra *clk = to_clk_tegra(__clk_get_hw(c));
BUG_ON(!clk->reset);
clk->reset(__clk_get_hw(c), true);
}
EXPORT_SYMBOL(tegra_periph_reset_assert);
@ -405,268 +151,14 @@ EXPORT_SYMBOL(tegra_periph_reset_assert);
int tegra_clk_cfg_ex(struct clk *c, enum tegra_clk_ex_param p, u32 setting)
{
int ret = 0;
unsigned long flags;
struct clk_tegra *clk = to_clk_tegra(__clk_get_hw(c));
spin_lock_irqsave(&c->spinlock, flags);
if (!c->ops || !c->ops->clk_cfg_ex) {
if (!clk->clk_cfg_ex) {
ret = -ENOSYS;
goto out;
}
ret = c->ops->clk_cfg_ex(c, p, setting);
ret = clk->clk_cfg_ex(__clk_get_hw(c), p, setting);
out:
spin_unlock_irqrestore(&c->spinlock, flags);
return ret;
}
#ifdef CONFIG_DEBUG_FS
static int __clk_lock_all_spinlocks(void)
{
struct clk *c;
list_for_each_entry(c, &clocks, node)
if (!spin_trylock(&c->spinlock))
goto unlock_spinlocks;
return 0;
unlock_spinlocks:
list_for_each_entry_continue_reverse(c, &clocks, node)
spin_unlock(&c->spinlock);
return -EAGAIN;
}
static void __clk_unlock_all_spinlocks(void)
{
struct clk *c;
list_for_each_entry_reverse(c, &clocks, node)
spin_unlock(&c->spinlock);
}
/*
* This function retries until it can take all locks, and may take
* an arbitrarily long time to complete.
* Must be called with irqs enabled, returns with irqs disabled
* Must be called with clock_list_lock held
*/
static void clk_lock_all(void)
{
int ret;
retry:
local_irq_disable();
ret = __clk_lock_all_spinlocks();
if (ret)
goto failed_spinlocks;
/* All locks taken successfully, return */
return;
failed_spinlocks:
local_irq_enable();
yield();
goto retry;
}
/*
* Unlocks all clocks after a clk_lock_all
* Must be called with irqs disabled, returns with irqs enabled
* Must be called with clock_list_lock held
*/
static void clk_unlock_all(void)
{
__clk_unlock_all_spinlocks();
local_irq_enable();
}
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 = "uninit";
char div[8] = {0};
if (c->state == ON)
state = "on";
else if (c->state == OFF)
state = "off";
if (c->mul != 0 && c->div != 0) {
if (c->mul > c->div) {
int mul = c->mul / c->div;
int mul2 = (c->mul * 10 / c->div) % 10;
int mul3 = (c->mul * 10) % c->div;
if (mul2 == 0 && mul3 == 0)
snprintf(div, sizeof(div), "x%d", mul);
else if (mul3 == 0)
snprintf(div, sizeof(div), "x%d.%d", mul, mul2);
else
snprintf(div, sizeof(div), "x%d.%d..", mul, mul2);
} else {
snprintf(div, sizeof(div), "%d%s", c->div / c->mul,
(c->div % c->mul) ? ".5" : "");
}
}
seq_printf(s, "%*s%c%c%-*s %-6s %-3d %-8s %-10lu\n",
level * 3 + 1, "",
c->rate > c->max_rate ? '!' : ' ',
!c->set ? '*' : ' ',
30 - level * 3, c->name,
state, c->refcnt, div, clk_get_rate_all_locked(c));
list_for_each_entry(child, &clocks, node) {
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;
seq_printf(s, " clock state ref div rate\n");
seq_printf(s, "--------------------------------------------------------------\n");
mutex_lock(&clock_list_lock);
clk_lock_all();
list_for_each_entry(c, &clocks, node)
if (c->parent == NULL)
clock_tree_show_one(s, c, 0);
clk_unlock_all();
mutex_unlock(&clock_list_lock);
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 possible_parents_show(struct seq_file *s, void *data)
{
struct clk *c = s->private;
int i;
for (i = 0; c->inputs[i].input; i++) {
char *first = (i == 0) ? "" : " ";
seq_printf(s, "%s%s", first, c->inputs[i].input->name);
}
seq_printf(s, "\n");
return 0;
}
static int possible_parents_open(struct inode *inode, struct file *file)
{
return single_open(file, possible_parents_show, inode->i_private);
}
static const struct file_operations possible_parents_fops = {
.open = possible_parents_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int clk_debugfs_register_one(struct clk *c)
{
struct dentry *d;
d = debugfs_create_dir(c->name, clk_debugfs_root);
if (!d)
return -ENOMEM;
c->dent = d;
d = debugfs_create_u8("refcnt", S_IRUGO, c->dent, (u8 *)&c->refcnt);
if (!d)
goto err_out;
d = debugfs_create_u32("rate", S_IRUGO, c->dent, (u32 *)&c->rate);
if (!d)
goto err_out;
d = debugfs_create_x32("flags", S_IRUGO, c->dent, (u32 *)&c->flags);
if (!d)
goto err_out;
if (c->inputs) {
d = debugfs_create_file("possible_parents", S_IRUGO, c->dent,
c, &possible_parents_fops);
if (!d)
goto err_out;
}
return 0;
err_out:
debugfs_remove_recursive(c->dent);
return -ENOMEM;
}
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;
}
int __init tegra_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, node) {
err = clk_debugfs_register(c);
if (err)
goto err_out;
}
return 0;
err_out:
debugfs_remove_recursive(clk_debugfs_root);
return err;
}
#endif

40
arch/arm/mach-tegra/clock.h
Просмотреть файл

@ -2,6 +2,7 @@
* arch/arm/mach-tegra/include/mach/clock.h
*
* Copyright (C) 2010 Google, Inc.
* Copyright (c) 2012 NVIDIA CORPORATION. All rights reserved.
*
* Author:
* Colin Cross <ccross@google.com>
@ -20,9 +21,9 @@
#ifndef __MACH_TEGRA_CLOCK_H
#define __MACH_TEGRA_CLOCK_H
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <mach/clk.h>
@ -52,7 +53,8 @@
#define ENABLE_ON_INIT (1 << 28)
#define PERIPH_ON_APB (1 << 29)
struct clk;
struct clk_tegra;
#define to_clk_tegra(_hw) container_of(_hw, struct clk_tegra, hw)
struct clk_mux_sel {
struct clk *input;
@ -68,47 +70,29 @@ struct clk_pll_freq_table {
u8 cpcon;
};
struct clk_ops {
void (*init)(struct clk *);
int (*enable)(struct clk *);
void (*disable)(struct clk *);
int (*set_parent)(struct clk *, struct clk *);
int (*set_rate)(struct clk *, unsigned long);
long (*round_rate)(struct clk *, unsigned long);
void (*reset)(struct clk *, bool);
int (*clk_cfg_ex)(struct clk *,
enum tegra_clk_ex_param, u32);
};
enum clk_state {
UNINITIALIZED = 0,
ON,
OFF,
};
struct clk {
struct clk_tegra {
/* node for master clocks list */
struct list_head node; /* node for list of all clocks */
struct list_head node; /* node for list of all clocks */
struct clk_lookup lookup;
struct clk_hw hw;
#ifdef CONFIG_DEBUG_FS
struct dentry *dent;
#endif
bool set;
struct clk_ops *ops;
unsigned long rate;
unsigned long fixed_rate;
unsigned long max_rate;
unsigned long min_rate;
u32 flags;
const char *name;
u32 refcnt;
enum clk_state state;
struct clk *parent;
u32 div;
u32 mul;
const struct clk_mux_sel *inputs;
u32 reg;
u32 reg_shift;
@ -144,7 +128,8 @@ struct clk {
} shared_bus_user;
} u;
spinlock_t spinlock;
void (*reset)(struct clk_hw *, bool);
int (*clk_cfg_ex)(struct clk_hw *, enum tegra_clk_ex_param, u32);
};
struct clk_duplicate {
@ -159,13 +144,10 @@ struct tegra_clk_init_table {
bool enabled;
};
void tegra_clk_add(struct clk *c);
void tegra2_init_clocks(void);
void tegra30_init_clocks(void);
void clk_init(struct clk *clk);
struct clk *tegra_get_clock_by_name(const char *name);
int clk_reparent(struct clk *c, struct clk *parent);
void tegra_clk_init_from_table(struct tegra_clk_init_table *table);
unsigned long clk_get_rate_locked(struct clk *c);
int clk_set_rate_locked(struct clk *c, unsigned long rate);
#endif

1
arch/arm/mach-tegra/common.c
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@ -152,6 +152,5 @@ void __init tegra30_init_early(void)
void __init tegra_init_late(void)
{
tegra_clk_debugfs_init();
tegra_powergate_debugfs_init();
}

48
arch/arm/mach-tegra/cpu-tegra.c
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@ -49,6 +49,8 @@ static struct cpufreq_frequency_table freq_table[] = {
#define NUM_CPUS 2
static struct clk *cpu_clk;
static struct clk *pll_x_clk;
static struct clk *pll_p_clk;
static struct clk *emc_clk;
static unsigned long target_cpu_speed[NUM_CPUS];
@ -71,6 +73,42 @@ static unsigned int tegra_getspeed(unsigned int cpu)
return rate;
}
static int tegra_cpu_clk_set_rate(unsigned long rate)
{
int ret;
/*
* Take an extra reference to the main pll so it doesn't turn
* off when we move the cpu off of it
*/
clk_prepare_enable(pll_x_clk);
ret = clk_set_parent(cpu_clk, pll_p_clk);
if (ret) {
pr_err("Failed to switch cpu to clock pll_p\n");
goto out;
}
if (rate == clk_get_rate(pll_p_clk))
goto out;
ret = clk_set_rate(pll_x_clk, rate);
if (ret) {
pr_err("Failed to change pll_x to %lu\n", rate);
goto out;
}
ret = clk_set_parent(cpu_clk, pll_x_clk);
if (ret) {
pr_err("Failed to switch cpu to clock pll_x\n");
goto out;
}
out:
clk_disable_unprepare(pll_x_clk);
return ret;
}
static int tegra_update_cpu_speed(unsigned long rate)
{
int ret = 0;
@ -101,7 +139,7 @@ static int tegra_update_cpu_speed(unsigned long rate)
freqs.old, freqs.new);
#endif
ret = clk_set_rate(cpu_clk, freqs.new * 1000);
ret = tegra_cpu_clk_set_rate(freqs.new * 1000);
if (ret) {
pr_err("cpu-tegra: Failed to set cpu frequency to %d kHz\n",
freqs.new);
@ -183,6 +221,14 @@ static int tegra_cpu_init(struct cpufreq_policy *policy)
if (IS_ERR(cpu_clk))
return PTR_ERR(cpu_clk);
pll_x_clk = clk_get_sys(NULL, "pll_x");
if (IS_ERR(pll_x_clk))
return PTR_ERR(pll_x_clk);
pll_p_clk = clk_get_sys(NULL, "pll_p");
if (IS_ERR(pll_p_clk))
return PTR_ERR(pll_p_clk);
emc_clk = clk_get_sys("cpu", "emc");
if (IS_ERR(emc_clk)) {
clk_put(cpu_clk);

3
arch/arm/mach-tegra/include/mach/clk.h
Просмотреть файл

@ -34,7 +34,10 @@ enum tegra_clk_ex_param {
void tegra_periph_reset_deassert(struct clk *c);
void tegra_periph_reset_assert(struct clk *c);
#ifndef CONFIG_COMMON_CLK
unsigned long clk_get_rate_all_locked(struct clk *c);
#endif
void tegra2_sdmmc_tap_delay(struct clk *c, int delay);
int tegra_clk_cfg_ex(struct clk *c, enum tegra_clk_ex_param p, u32 setting);

1555
arch/arm/mach-tegra/tegra20_clocks.c Normal file
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42
arch/arm/mach-tegra/tegra20_clocks.h Normal file
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@ -0,0 +1,42 @@
/*
* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef __MACH_TEGRA20_CLOCK_H
#define __MACH_TEGRA20_CLOCK_H
extern struct clk_ops tegra_clk_32k_ops;
extern struct clk_ops tegra_pll_ops;
extern struct clk_ops tegra_clk_m_ops;
extern struct clk_ops tegra_pll_div_ops;
extern struct clk_ops tegra_pllx_ops;
extern struct clk_ops tegra_plle_ops;
extern struct clk_ops tegra_clk_double_ops;
extern struct clk_ops tegra_cdev_clk_ops;
extern struct clk_ops tegra_audio_sync_clk_ops;
extern struct clk_ops tegra_super_ops;
extern struct clk_ops tegra_cpu_ops;
extern struct clk_ops tegra_twd_ops;
extern struct clk_ops tegra_cop_ops;
extern struct clk_ops tegra_bus_ops;
extern struct clk_ops tegra_blink_clk_ops;
extern struct clk_ops tegra_emc_clk_ops;
extern struct clk_ops tegra_periph_clk_ops;
extern struct clk_ops tegra_clk_shared_bus_ops;
void tegra2_periph_clk_reset(struct clk_hw *hw, bool assert);
void tegra2_cop_clk_reset(struct clk_hw *hw, bool assert);
#endif

1142
arch/arm/mach-tegra/tegra20_clocks_data.c Normal file
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2484
arch/arm/mach-tegra/tegra2_clocks.c
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2559
arch/arm/mach-tegra/tegra30_clocks.c
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53
arch/arm/mach-tegra/tegra30_clocks.h Normal file
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@ -0,0 +1,53 @@
/*
* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef __MACH_TEGRA30_CLOCK_H
#define __MACH_TEGRA30_CLOCK_H
extern struct clk_ops tegra30_clk_32k_ops;
extern struct clk_ops tegra30_clk_m_ops;
extern struct clk_ops tegra_clk_m_div_ops;
extern struct clk_ops tegra_pll_ref_ops;
extern struct clk_ops tegra30_pll_ops;
extern struct clk_ops tegra30_pll_div_ops;
extern struct clk_ops tegra_plld_ops;
extern struct clk_ops tegra30_plle_ops;
extern struct clk_ops tegra_cml_clk_ops;
extern struct clk_ops tegra_pciex_clk_ops;
extern struct clk_ops tegra_sync_source_ops;
extern struct clk_ops tegra30_audio_sync_clk_ops;
extern struct clk_ops tegra30_clk_double_ops;
extern struct clk_ops tegra_clk_out_ops;
extern struct clk_ops tegra30_super_ops;
extern struct clk_ops tegra30_blink_clk_ops;
extern struct clk_ops tegra30_twd_ops;
extern struct clk_ops tegra30_periph_clk_ops;
extern struct clk_ops tegra30_dsib_clk_ops;
extern struct clk_ops tegra_nand_clk_ops;
extern struct clk_ops tegra_vi_clk_ops;
extern struct clk_ops tegra_dtv_clk_ops;
extern struct clk_ops tegra_clk_shared_bus_ops;
int tegra30_plld_clk_cfg_ex(struct clk_hw *hw,
enum tegra_clk_ex_param p, u32 setting);
void tegra30_periph_clk_reset(struct clk_hw *hw, bool assert);
int tegra30_vi_clk_cfg_ex(struct clk_hw *hw,
enum tegra_clk_ex_param p, u32 setting);
int tegra30_nand_clk_cfg_ex(struct clk_hw *hw,
enum tegra_clk_ex_param p, u32 setting);
int tegra30_dtv_clk_cfg_ex(struct clk_hw *hw,
enum tegra_clk_ex_param p, u32 setting);
#endif

1369
arch/arm/mach-tegra/tegra30_clocks_data.c Normal file
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