|
|
@@ -20,11 +20,7 @@
|
|
|
#include <linux/errno.h>
|
|
|
#include <linux/err.h>
|
|
|
#include <linux/delay.h>
|
|
|
-#ifdef CONFIG_COMMON_CLK
|
|
|
#include <linux/clk-provider.h>
|
|
|
-#else
|
|
|
-#include <linux/clk.h>
|
|
|
-#endif
|
|
|
#include <linux/io.h>
|
|
|
#include <linux/bitops.h>
|
|
|
|
|
|
@@ -59,13 +55,6 @@ u16 cpu_mask;
|
|
|
*/
|
|
|
static bool clkdm_control = true;
|
|
|
|
|
|
-static LIST_HEAD(clocks);
|
|
|
-static DEFINE_MUTEX(clocks_mutex);
|
|
|
-#ifndef CONFIG_COMMON_CLK
|
|
|
-static DEFINE_SPINLOCK(clockfw_lock);
|
|
|
-#endif
|
|
|
-
|
|
|
-#ifdef CONFIG_COMMON_CLK
|
|
|
static LIST_HEAD(clk_hw_omap_clocks);
|
|
|
|
|
|
/*
|
|
|
@@ -88,7 +77,6 @@ unsigned long omap_fixed_divisor_recalc(struct clk_hw *hw,
|
|
|
|
|
|
return parent_rate / oclk->fixed_div;
|
|
|
}
|
|
|
-#endif
|
|
|
|
|
|
/*
|
|
|
* OMAP2+ specific clock functions
|
|
|
@@ -140,11 +128,7 @@ static int _wait_idlest_generic(void __iomem *reg, u32 mask, u8 idlest,
|
|
|
* belong in the clock code and will be moved in the medium term to
|
|
|
* module-dependent code. No return value.
|
|
|
*/
|
|
|
-#ifdef CONFIG_COMMON_CLK
|
|
|
static void _omap2_module_wait_ready(struct clk_hw_omap *clk)
|
|
|
-#else
|
|
|
-static void _omap2_module_wait_ready(struct clk *clk)
|
|
|
-#endif
|
|
|
{
|
|
|
void __iomem *companion_reg, *idlest_reg;
|
|
|
u8 other_bit, idlest_bit, idlest_val, idlest_reg_id;
|
|
|
@@ -163,11 +147,7 @@ static void _omap2_module_wait_ready(struct clk *clk)
|
|
|
if (r) {
|
|
|
/* IDLEST register not in the CM module */
|
|
|
_wait_idlest_generic(idlest_reg, (1 << idlest_bit), idlest_val,
|
|
|
-#ifdef CONFIG_COMMON_CLK
|
|
|
__clk_get_name(clk->hw.clk));
|
|
|
-#else
|
|
|
- clk->name);
|
|
|
-#endif
|
|
|
} else {
|
|
|
cm_wait_module_ready(prcm_mod, idlest_reg_id, idlest_bit);
|
|
|
};
|
|
|
@@ -183,25 +163,16 @@ static void _omap2_module_wait_ready(struct clk *clk)
|
|
|
* clockdomain pointer, and save it into the struct clk. Intended to be
|
|
|
* called during clk_register(). No return value.
|
|
|
*/
|
|
|
-#ifdef CONFIG_COMMON_CLK
|
|
|
void omap2_init_clk_clkdm(struct clk_hw *hw)
|
|
|
{
|
|
|
struct clk_hw_omap *clk = to_clk_hw_omap(hw);
|
|
|
-#else
|
|
|
-void omap2_init_clk_clkdm(struct clk *clk)
|
|
|
-{
|
|
|
-#endif
|
|
|
struct clockdomain *clkdm;
|
|
|
const char *clk_name;
|
|
|
|
|
|
if (!clk->clkdm_name)
|
|
|
return;
|
|
|
|
|
|
-#ifdef CONFIG_COMMON_CLK
|
|
|
clk_name = __clk_get_name(hw->clk);
|
|
|
-#else
|
|
|
- clk_name = __clk_get_name(clk);
|
|
|
-#endif
|
|
|
|
|
|
clkdm = clkdm_lookup(clk->clkdm_name);
|
|
|
if (clkdm) {
|
|
|
@@ -248,11 +219,7 @@ void __init omap2_clk_disable_clkdm_control(void)
|
|
|
* associate this type of code with per-module data structures to
|
|
|
* avoid this issue, and remove the casts. No return value.
|
|
|
*/
|
|
|
-#ifdef CONFIG_COMMON_CLK
|
|
|
void omap2_clk_dflt_find_companion(struct clk_hw_omap *clk,
|
|
|
-#else
|
|
|
-void omap2_clk_dflt_find_companion(struct clk *clk,
|
|
|
-#endif
|
|
|
void __iomem **other_reg, u8 *other_bit)
|
|
|
{
|
|
|
u32 r;
|
|
|
@@ -281,11 +248,7 @@ void omap2_clk_dflt_find_companion(struct clk *clk,
|
|
|
* register address ID (e.g., that CM_FCLKEN2 corresponds to
|
|
|
* CM_IDLEST2). This is not true for all modules. No return value.
|
|
|
*/
|
|
|
-#ifdef CONFIG_COMMON_CLK
|
|
|
void omap2_clk_dflt_find_idlest(struct clk_hw_omap *clk,
|
|
|
-#else
|
|
|
-void omap2_clk_dflt_find_idlest(struct clk *clk,
|
|
|
-#endif
|
|
|
void __iomem **idlest_reg, u8 *idlest_bit, u8 *idlest_val)
|
|
|
{
|
|
|
u32 r;
|
|
|
@@ -308,7 +271,6 @@ void omap2_clk_dflt_find_idlest(struct clk *clk,
|
|
|
|
|
|
}
|
|
|
|
|
|
-#ifdef CONFIG_COMMON_CLK
|
|
|
/**
|
|
|
* omap2_dflt_clk_enable - enable a clock in the hardware
|
|
|
* @hw: struct clk_hw * of the clock to enable
|
|
|
@@ -605,238 +567,6 @@ const struct clk_hw_omap_ops clkhwops_wait = {
|
|
|
.find_idlest = omap2_clk_dflt_find_idlest,
|
|
|
.find_companion = omap2_clk_dflt_find_companion,
|
|
|
};
|
|
|
-#else
|
|
|
-int omap2_dflt_clk_enable(struct clk *clk)
|
|
|
-{
|
|
|
- u32 v;
|
|
|
-
|
|
|
- if (unlikely(clk->enable_reg == NULL)) {
|
|
|
- pr_err("clock.c: Enable for %s without enable code\n",
|
|
|
- clk->name);
|
|
|
- return 0; /* REVISIT: -EINVAL */
|
|
|
- }
|
|
|
-
|
|
|
- v = __raw_readl(clk->enable_reg);
|
|
|
- if (clk->flags & INVERT_ENABLE)
|
|
|
- v &= ~(1 << clk->enable_bit);
|
|
|
- else
|
|
|
- v |= (1 << clk->enable_bit);
|
|
|
- __raw_writel(v, clk->enable_reg);
|
|
|
- v = __raw_readl(clk->enable_reg); /* OCP barrier */
|
|
|
-
|
|
|
- if (clk->ops->find_idlest)
|
|
|
- _omap2_module_wait_ready(clk);
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-void omap2_dflt_clk_disable(struct clk *clk)
|
|
|
-{
|
|
|
- u32 v;
|
|
|
-
|
|
|
- if (!clk->enable_reg) {
|
|
|
- /*
|
|
|
- * 'Independent' here refers to a clock which is not
|
|
|
- * controlled by its parent.
|
|
|
- */
|
|
|
- pr_err("clock: clk_disable called on independent clock %s which has no enable_reg\n", clk->name);
|
|
|
- return;
|
|
|
- }
|
|
|
-
|
|
|
- v = __raw_readl(clk->enable_reg);
|
|
|
- if (clk->flags & INVERT_ENABLE)
|
|
|
- v |= (1 << clk->enable_bit);
|
|
|
- else
|
|
|
- v &= ~(1 << clk->enable_bit);
|
|
|
- __raw_writel(v, clk->enable_reg);
|
|
|
- /* No OCP barrier needed here since it is a disable operation */
|
|
|
-}
|
|
|
-
|
|
|
-const struct clkops clkops_omap2_dflt_wait = {
|
|
|
- .enable = omap2_dflt_clk_enable,
|
|
|
- .disable = omap2_dflt_clk_disable,
|
|
|
- .find_companion = omap2_clk_dflt_find_companion,
|
|
|
- .find_idlest = omap2_clk_dflt_find_idlest,
|
|
|
-};
|
|
|
-
|
|
|
-const struct clkops clkops_omap2_dflt = {
|
|
|
- .enable = omap2_dflt_clk_enable,
|
|
|
- .disable = omap2_dflt_clk_disable,
|
|
|
-};
|
|
|
-
|
|
|
-/**
|
|
|
- * omap2_clk_disable - disable a clock, if the system is not using it
|
|
|
- * @clk: struct clk * to disable
|
|
|
- *
|
|
|
- * Decrements the usecount on struct clk @clk. If there are no users
|
|
|
- * left, call the clkops-specific clock disable function to disable it
|
|
|
- * in hardware. If the clock is part of a clockdomain (which they all
|
|
|
- * should be), request that the clockdomain be disabled. (It too has
|
|
|
- * a usecount, and so will not be disabled in the hardware until it no
|
|
|
- * longer has any users.) If the clock has a parent clock (most of
|
|
|
- * them do), then call ourselves, recursing on the parent clock. This
|
|
|
- * can cause an entire branch of the clock tree to be powered off by
|
|
|
- * simply disabling one clock. Intended to be called with the clockfw_lock
|
|
|
- * spinlock held. No return value.
|
|
|
- */
|
|
|
-void omap2_clk_disable(struct clk *clk)
|
|
|
-{
|
|
|
- if (clk->usecount == 0) {
|
|
|
- WARN(1, "clock: %s: omap2_clk_disable() called, but usecount already 0?", clk->name);
|
|
|
- return;
|
|
|
- }
|
|
|
-
|
|
|
- pr_debug("clock: %s: decrementing usecount\n", clk->name);
|
|
|
-
|
|
|
- clk->usecount--;
|
|
|
-
|
|
|
- if (clk->usecount > 0)
|
|
|
- return;
|
|
|
-
|
|
|
- pr_debug("clock: %s: disabling in hardware\n", clk->name);
|
|
|
-
|
|
|
- if (clk->ops && clk->ops->disable) {
|
|
|
- trace_clock_disable(clk->name, 0, smp_processor_id());
|
|
|
- clk->ops->disable(clk);
|
|
|
- }
|
|
|
-
|
|
|
- if (clkdm_control && clk->clkdm)
|
|
|
- clkdm_clk_disable(clk->clkdm, clk);
|
|
|
-
|
|
|
- if (clk->parent)
|
|
|
- omap2_clk_disable(clk->parent);
|
|
|
-}
|
|
|
-
|
|
|
-/**
|
|
|
- * omap2_clk_enable - request that the system enable a clock
|
|
|
- * @clk: struct clk * to enable
|
|
|
- *
|
|
|
- * Increments the usecount on struct clk @clk. If there were no users
|
|
|
- * previously, then recurse up the clock tree, enabling all of the
|
|
|
- * clock's parents and all of the parent clockdomains, and finally,
|
|
|
- * enabling @clk's clockdomain, and @clk itself. Intended to be
|
|
|
- * called with the clockfw_lock spinlock held. Returns 0 upon success
|
|
|
- * or a negative error code upon failure.
|
|
|
- */
|
|
|
-int omap2_clk_enable(struct clk *clk)
|
|
|
-{
|
|
|
- int ret;
|
|
|
-
|
|
|
- pr_debug("clock: %s: incrementing usecount\n", clk->name);
|
|
|
-
|
|
|
- clk->usecount++;
|
|
|
-
|
|
|
- if (clk->usecount > 1)
|
|
|
- return 0;
|
|
|
-
|
|
|
- pr_debug("clock: %s: enabling in hardware\n", clk->name);
|
|
|
-
|
|
|
- if (clk->parent) {
|
|
|
- ret = omap2_clk_enable(clk->parent);
|
|
|
- if (ret) {
|
|
|
- WARN(1, "clock: %s: could not enable parent %s: %d\n",
|
|
|
- clk->name, clk->parent->name, ret);
|
|
|
- goto oce_err1;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- if (clkdm_control && clk->clkdm) {
|
|
|
- ret = clkdm_clk_enable(clk->clkdm, clk);
|
|
|
- if (ret) {
|
|
|
- WARN(1, "clock: %s: could not enable clockdomain %s: %d\n",
|
|
|
- clk->name, clk->clkdm->name, ret);
|
|
|
- goto oce_err2;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- if (clk->ops && clk->ops->enable) {
|
|
|
- trace_clock_enable(clk->name, 1, smp_processor_id());
|
|
|
- ret = clk->ops->enable(clk);
|
|
|
- if (ret) {
|
|
|
- WARN(1, "clock: %s: could not enable: %d\n",
|
|
|
- clk->name, ret);
|
|
|
- goto oce_err3;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- return 0;
|
|
|
-
|
|
|
-oce_err3:
|
|
|
- if (clkdm_control && clk->clkdm)
|
|
|
- clkdm_clk_disable(clk->clkdm, clk);
|
|
|
-oce_err2:
|
|
|
- if (clk->parent)
|
|
|
- omap2_clk_disable(clk->parent);
|
|
|
-oce_err1:
|
|
|
- clk->usecount--;
|
|
|
-
|
|
|
- return ret;
|
|
|
-}
|
|
|
-
|
|
|
-/* Given a clock and a rate apply a clock specific rounding function */
|
|
|
-long omap2_clk_round_rate(struct clk *clk, unsigned long rate)
|
|
|
-{
|
|
|
- if (clk->round_rate)
|
|
|
- return clk->round_rate(clk, rate);
|
|
|
-
|
|
|
- return clk->rate;
|
|
|
-}
|
|
|
-
|
|
|
-/* Set the clock rate for a clock source */
|
|
|
-int omap2_clk_set_rate(struct clk *clk, unsigned long rate)
|
|
|
-{
|
|
|
- int ret = -EINVAL;
|
|
|
-
|
|
|
- pr_debug("clock: set_rate for clock %s to rate %ld\n", clk->name, rate);
|
|
|
-
|
|
|
- /* dpll_ck, core_ck, virt_prcm_set; plus all clksel clocks */
|
|
|
- if (clk->set_rate) {
|
|
|
- trace_clock_set_rate(clk->name, rate, smp_processor_id());
|
|
|
- ret = clk->set_rate(clk, rate);
|
|
|
- }
|
|
|
-
|
|
|
- return ret;
|
|
|
-}
|
|
|
-
|
|
|
-int omap2_clk_set_parent(struct clk *clk, struct clk *new_parent)
|
|
|
-{
|
|
|
- if (!clk->clksel)
|
|
|
- return -EINVAL;
|
|
|
-
|
|
|
- if (clk->parent == new_parent)
|
|
|
- return 0;
|
|
|
-
|
|
|
- return omap2_clksel_set_parent(clk, new_parent);
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- * OMAP2+ clock reset and init functions
|
|
|
- */
|
|
|
-
|
|
|
-#ifdef CONFIG_OMAP_RESET_CLOCKS
|
|
|
-void omap2_clk_disable_unused(struct clk *clk)
|
|
|
-{
|
|
|
- u32 regval32, v;
|
|
|
-
|
|
|
- v = (clk->flags & INVERT_ENABLE) ? (1 << clk->enable_bit) : 0;
|
|
|
-
|
|
|
- regval32 = __raw_readl(clk->enable_reg);
|
|
|
- if ((regval32 & (1 << clk->enable_bit)) == v)
|
|
|
- return;
|
|
|
-
|
|
|
- pr_debug("Disabling unused clock \"%s\"\n", clk->name);
|
|
|
- if (cpu_is_omap34xx()) {
|
|
|
- omap2_clk_enable(clk);
|
|
|
- omap2_clk_disable(clk);
|
|
|
- } else {
|
|
|
- clk->ops->disable(clk);
|
|
|
- }
|
|
|
- if (clk->clkdm != NULL)
|
|
|
- pwrdm_state_switch(clk->clkdm->pwrdm.ptr);
|
|
|
-}
|
|
|
-#endif
|
|
|
-
|
|
|
-#endif /* CONFIG_COMMON_CLK */
|
|
|
|
|
|
/**
|
|
|
* omap2_clk_switch_mpurate_at_boot - switch ARM MPU rate by boot-time argument
|
|
|
@@ -874,10 +604,6 @@ int __init omap2_clk_switch_mpurate_at_boot(const char *mpurate_ck_name)
|
|
|
}
|
|
|
|
|
|
calibrate_delay();
|
|
|
-#ifndef CONFIG_COMMON_CLK
|
|
|
- recalculate_root_clocks();
|
|
|
-#endif
|
|
|
-
|
|
|
clk_put(mpurate_ck);
|
|
|
|
|
|
return 0;
|
|
|
@@ -921,513 +647,3 @@ void __init omap2_clk_print_new_rates(const char *hfclkin_ck_name,
|
|
|
(clk_get_rate(core_ck) / 1000000),
|
|
|
(clk_get_rate(mpu_ck) / 1000000));
|
|
|
}
|
|
|
-
|
|
|
-#ifndef CONFIG_COMMON_CLK
|
|
|
-/* Common data */
|
|
|
-int clk_enable(struct clk *clk)
|
|
|
-{
|
|
|
- unsigned long flags;
|
|
|
- int ret;
|
|
|
-
|
|
|
- if (clk == NULL || IS_ERR(clk))
|
|
|
- return -EINVAL;
|
|
|
-
|
|
|
- spin_lock_irqsave(&clockfw_lock, flags);
|
|
|
- ret = omap2_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;
|
|
|
-
|
|
|
- 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;
|
|
|
- }
|
|
|
-
|
|
|
- omap2_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;
|
|
|
-
|
|
|
- spin_lock_irqsave(&clockfw_lock, flags);
|
|
|
- ret = omap2_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;
|
|
|
-
|
|
|
- spin_lock_irqsave(&clockfw_lock, flags);
|
|
|
- ret = omap2_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;
|
|
|
-
|
|
|
- spin_lock_irqsave(&clockfw_lock, flags);
|
|
|
- if (clk->usecount == 0) {
|
|
|
- ret = omap2_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);
|
|
|
-}
|
|
|
-
|
|
|
-/**
|
|
|
- * omap_clk_get_by_name - locate OMAP struct clk by its name
|
|
|
- * @name: name of the struct clk to locate
|
|
|
- *
|
|
|
- * Locate an OMAP struct clk by its name. Assumes that struct clk
|
|
|
- * names are unique. Returns NULL if not found or a pointer to the
|
|
|
- * struct clk if found.
|
|
|
- */
|
|
|
-struct clk *omap_clk_get_by_name(const char *name)
|
|
|
-{
|
|
|
- struct clk *c;
|
|
|
- struct clk *ret = NULL;
|
|
|
-
|
|
|
- mutex_lock(&clocks_mutex);
|
|
|
-
|
|
|
- list_for_each_entry(c, &clocks, node) {
|
|
|
- if (!strcmp(c->name, name)) {
|
|
|
- ret = c;
|
|
|
- break;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- mutex_unlock(&clocks_mutex);
|
|
|
-
|
|
|
- return ret;
|
|
|
-}
|
|
|
-
|
|
|
-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;
|
|
|
-
|
|
|
- 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;
|
|
|
-
|
|
|
- omap2_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
|
|
|
-
|
|
|
-#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) */
|
|
|
-#endif /* CONFIG_COMMON_CLK */
|
Mike Turquette