1 files changed, 242 insertions, 668 deletions

diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c
index e381d991092c..e4ec3a69ee2e 100644
--- a/arch/arm/mach-omap2/clock.c
+++ b/arch/arm/mach-omap2/clock.c
@@ -20,7 +20,7 @@
 #include <linux/errno.h>
 #include <linux/err.h>
 #include <linux/delay.h>
-#include <linux/clk.h>
+#include <linux/clk-provider.h>
 #include <linux/io.h>
 #include <linux/bitops.h>
 
@@ -55,9 +55,28 @@ u16 cpu_mask;
  */
 static bool clkdm_control = true;
 
-static LIST_HEAD(clocks);
-static DEFINE_MUTEX(clocks_mutex);
-static DEFINE_SPINLOCK(clockfw_lock);
+static LIST_HEAD(clk_hw_omap_clocks);
+
+/*
+ * Used for clocks that have the same value as the parent clock,
+ * divided by some factor
+ */
+unsigned long omap_fixed_divisor_recalc(struct clk_hw *hw,
+                unsigned long parent_rate)
+{
+        struct clk_hw_omap *oclk;
+
+        if (!hw) {
+                pr_warn("%s: hw is NULL\n", __func__);
+                return -EINVAL;
+        }
+
+        oclk = to_clk_hw_omap(hw);
+
+        WARN_ON(!oclk->fixed_div);
+
+        return parent_rate / oclk->fixed_div;
+}
 
 /*
  * OMAP2+ specific clock functions
@@ -109,7 +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.
  */
-static void _omap2_module_wait_ready(struct clk *clk)
+static void _omap2_module_wait_ready(struct clk_hw_omap *clk)
 {
         void __iomem *companion_reg, *idlest_reg;
         u8 other_bit, idlest_bit, idlest_val, idlest_reg_id;
@@ -124,12 +143,11 @@ static void _omap2_module_wait_ready(struct clk *clk)
         }
 
         clk->ops->find_idlest(clk, &idlest_reg, &idlest_bit, &idlest_val);
-
         r = cm_split_idlest_reg(idlest_reg, &prcm_mod, &idlest_reg_id);
         if (r) {
                 /* IDLEST register not in the CM module */
                 _wait_idlest_generic(idlest_reg, (1 << idlest_bit), idlest_val,
-                                     clk->name);
+                                     __clk_get_name(clk->hw.clk));
         } else {
                 cm_wait_module_ready(prcm_mod, idlest_reg_id, idlest_bit);
         };
@@ -145,15 +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.
  */
-void omap2_init_clk_clkdm(struct clk *clk)
+void omap2_init_clk_clkdm(struct clk_hw *hw)
 {
+        struct clk_hw_omap *clk = to_clk_hw_omap(hw);
         struct clockdomain *clkdm;
         const char *clk_name;
 
         if (!clk->clkdm_name)
                 return;
 
-        clk_name = __clk_get_name(clk);
+        clk_name = __clk_get_name(hw->clk);
 
         clkdm = clkdm_lookup(clk->clkdm_name);
         if (clkdm) {
@@ -200,8 +219,8 @@ 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.
  */
-void omap2_clk_dflt_find_companion(struct clk *clk, void __iomem **other_reg,
-                                   u8 *other_bit)
+void omap2_clk_dflt_find_companion(struct clk_hw_omap *clk,
+                        void __iomem **other_reg, u8 *other_bit)
 {
         u32 r;
 
@@ -229,8 +248,8 @@ void omap2_clk_dflt_find_companion(struct clk *clk, void __iomem **other_reg,
  * register address ID (e.g., that CM_FCLKEN2 corresponds to
  * CM_IDLEST2).  This is not true for all modules.  No return value.
  */
-void omap2_clk_dflt_find_idlest(struct clk *clk, void __iomem **idlest_reg,
-                                u8 *idlest_bit, u8 *idlest_val)
+void omap2_clk_dflt_find_idlest(struct clk_hw_omap *clk,
+                void __iomem **idlest_reg, u8 *idlest_bit, u8 *idlest_val)
 {
         u32 r;
 
@@ -252,16 +271,44 @@ void omap2_clk_dflt_find_idlest(struct clk *clk, void __iomem **idlest_reg,
 
 }
 
-int omap2_dflt_clk_enable(struct clk *clk)
+/**
+ * omap2_dflt_clk_enable - enable a clock in the hardware
+ * @hw: struct clk_hw * of the clock to enable
+ *
+ * Enable the clock @hw in the hardware.  We first call into the OMAP
+ * clockdomain code to "enable" the corresponding clockdomain if this
+ * is the first enabled user of the clockdomain.  Then program the
+ * hardware to enable the clock.  Then wait for the IP block that uses
+ * this clock to leave idle (if applicable).  Returns the error value
+ * from clkdm_clk_enable() if it terminated with an error, or -EINVAL
+ * if @hw has a null clock enable_reg, or zero upon success.
+ */
+int omap2_dflt_clk_enable(struct clk_hw *hw)
 {
+        struct clk_hw_omap *clk;
         u32 v;
+        int ret = 0;
+
+        clk = to_clk_hw_omap(hw);
+
+        if (clkdm_control && clk->clkdm) {
+                ret = clkdm_clk_enable(clk->clkdm, hw->clk);
+                if (ret) {
+                        WARN(1, "%s: could not enable %s's clockdomain %s: %d\n",
+                             __func__, __clk_get_name(hw->clk),
+                             clk->clkdm->name, ret);
+                        return ret;
+                }
+        }
 
         if (unlikely(clk->enable_reg == NULL)) {
-                pr_err("clock.c: Enable for %s without enable code\n",
-                       clk->name);
-                return 0; /* REVISIT: -EINVAL */
+                pr_err("%s: %s missing enable_reg\n", __func__,
+                       __clk_get_name(hw->clk));
+                ret = -EINVAL;
+                goto err;
         }
 
+        /* FIXME should not have INVERT_ENABLE bit here */
         v = __raw_readl(clk->enable_reg);
         if (clk->flags & INVERT_ENABLE)
                 v &= ~(1 << clk->enable_bit);
@@ -270,22 +317,39 @@ int omap2_dflt_clk_enable(struct clk *clk)
         __raw_writel(v, clk->enable_reg);
         v = __raw_readl(clk->enable_reg); /* OCP barrier */
 
-        if (clk->ops->find_idlest)
+        if (clk->ops && clk->ops->find_idlest)
                 _omap2_module_wait_ready(clk);
 
         return 0;
+
+err:
+        if (clkdm_control && clk->clkdm)
+                clkdm_clk_disable(clk->clkdm, hw->clk);
+        return ret;
 }
 
-void omap2_dflt_clk_disable(struct clk *clk)
+/**
+ * omap2_dflt_clk_disable - disable a clock in the hardware
+ * @hw: struct clk_hw * of the clock to disable
+ *
+ * Disable the clock @hw in the hardware, and call into the OMAP
+ * clockdomain code to "disable" the corresponding clockdomain if all
+ * clocks/hwmods in that clockdomain are now disabled.  No return
+ * value.
+ */
+void omap2_dflt_clk_disable(struct clk_hw *hw)
 {
+        struct clk_hw_omap *clk;
         u32 v;
 
+        clk = to_clk_hw_omap(hw);
         if (!clk->enable_reg) {
                 /*
-                 * 'Independent' here refers to a clock which is not
+                 * '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);
+                pr_err("%s: independent clock %s has no enable_reg\n",
+                       __func__, __clk_get_name(hw->clk));
                 return;
         }
 
@@ -296,191 +360,213 @@ void omap2_dflt_clk_disable(struct clk *clk)
                 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,
-};
+        if (clkdm_control && clk->clkdm)
+                clkdm_clk_disable(clk->clkdm, hw->clk);
+}
 
 /**
- * omap2_clk_disable - disable a clock, if the system is not using it
- * @clk: struct clk * to disable
+ * omap2_clkops_enable_clkdm - increment usecount on clkdm of @hw
+ * @hw: struct clk_hw * of the clock being enabled
  *
- * 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.
+ * Increment the usecount of the clockdomain of the clock pointed to
+ * by @hw; if the usecount is 1, the clockdomain will be "enabled."
+ * Only needed for clocks that don't use omap2_dflt_clk_enable() as
+ * their enable function pointer.  Passes along the return value of
+ * clkdm_clk_enable(), -EINVAL if @hw is not associated with a
+ * clockdomain, or 0 if clock framework-based clockdomain control is
+ * not implemented.
  */
-void omap2_clk_disable(struct clk *clk)
+int omap2_clkops_enable_clkdm(struct clk_hw *hw)
 {
-        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);
+        struct clk_hw_omap *clk;
+        int ret = 0;
 
-        clk->usecount--;
+        clk = to_clk_hw_omap(hw);
 
-        if (clk->usecount > 0)
-                return;
+        if (unlikely(!clk->clkdm)) {
+                pr_err("%s: %s: no clkdm set ?!\n", __func__,
+                       __clk_get_name(hw->clk));
+                return -EINVAL;
+        }
 
-        pr_debug("clock: %s: disabling in hardware\n", clk->name);
+        if (unlikely(clk->enable_reg))
+                pr_err("%s: %s: should use dflt_clk_enable ?!\n", __func__,
+                       __clk_get_name(hw->clk));
 
-        if (clk->ops && clk->ops->disable) {
-                trace_clock_disable(clk->name, 0, smp_processor_id());
-                clk->ops->disable(clk);
+        if (!clkdm_control) {
+                pr_err("%s: %s: clkfw-based clockdomain control disabled ?!\n",
+                       __func__, __clk_get_name(hw->clk));
+                return 0;
         }
 
-        if (clkdm_control && clk->clkdm)
-                clkdm_clk_disable(clk->clkdm, clk);
+        ret = clkdm_clk_enable(clk->clkdm, hw->clk);
+        WARN(ret, "%s: could not enable %s's clockdomain %s: %d\n",
+             __func__, __clk_get_name(hw->clk), clk->clkdm->name, ret);
 
-        if (clk->parent)
-                omap2_clk_disable(clk->parent);
+        return ret;
 }
 
 /**
- * omap2_clk_enable - request that the system enable a clock
- * @clk: struct clk * to enable
+ * omap2_clkops_disable_clkdm - decrement usecount on clkdm of @hw
+ * @hw: struct clk_hw * of the clock being disabled
  *
- * 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.
+ * Decrement the usecount of the clockdomain of the clock pointed to
+ * by @hw; if the usecount is 0, the clockdomain will be "disabled."
+ * Only needed for clocks that don't use omap2_dflt_clk_disable() as their
+ * disable function pointer.  No return value.
  */
-int omap2_clk_enable(struct clk *clk)
+void omap2_clkops_disable_clkdm(struct clk_hw *hw)
 {
-        int ret;
+        struct clk_hw_omap *clk;
 
-        pr_debug("clock: %s: incrementing usecount\n", clk->name);
+        clk = to_clk_hw_omap(hw);
 
-        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 (unlikely(!clk->clkdm)) {
+                pr_err("%s: %s: no clkdm set ?!\n", __func__,
+                       __clk_get_name(hw->clk));
+                return;
         }
 
-        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 (unlikely(clk->enable_reg))
+                pr_err("%s: %s: should use dflt_clk_disable ?!\n", __func__,
+                       __clk_get_name(hw->clk));
 
-        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;
-                }
+        if (!clkdm_control) {
+                pr_err("%s: %s: clkfw-based clockdomain control disabled ?!\n",
+                       __func__, __clk_get_name(hw->clk));
+                return;
         }
 
-        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;
+        clkdm_clk_disable(clk->clkdm, hw->clk);
 }
 
-/* Given a clock and a rate apply a clock specific rounding function */
-long omap2_clk_round_rate(struct clk *clk, unsigned long rate)
+/**
+ * omap2_dflt_clk_is_enabled - is clock enabled in the hardware?
+ * @hw: struct clk_hw * to check
+ *
+ * Return 1 if the clock represented by @hw is enabled in the
+ * hardware, or 0 otherwise.  Intended for use in the struct
+ * clk_ops.is_enabled function pointer.
+ */
+int omap2_dflt_clk_is_enabled(struct clk_hw *hw)
 {
-        if (clk->round_rate)
-                return clk->round_rate(clk, rate);
+        struct clk_hw_omap *clk = to_clk_hw_omap(hw);
+        u32 v;
 
-        return clk->rate;
+        v = __raw_readl(clk->enable_reg);
+
+        if (clk->flags & INVERT_ENABLE)
+                v ^= BIT(clk->enable_bit);
+
+        v &= BIT(clk->enable_bit);
+
+        return v ? 1 : 0;
 }
 
-/* Set the clock rate for a clock source */
-int omap2_clk_set_rate(struct clk *clk, unsigned long rate)
+static 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)
 {
-        int ret = -EINVAL;
+        get_option(&str, &mpurate);
 
-        pr_debug("clock: set_rate for clock %s to rate %ld\n", clk->name, rate);
+        if (!mpurate)
+                return 1;
 
-        /* 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);
-        }
+        if (mpurate < 1000)
+                mpurate *= 1000000;
 
-        return ret;
+        return 1;
 }
+__setup("mpurate=", omap_clk_setup);
 
-int omap2_clk_set_parent(struct clk *clk, struct clk *new_parent)
+/**
+ * omap2_init_clk_hw_omap_clocks - initialize an OMAP clock
+ * @clk: struct clk * to initialize
+ *
+ * Add an OMAP clock @clk to the internal list of OMAP clocks.  Used
+ * temporarily for autoidle handling, until this support can be
+ * integrated into the common clock framework code in some way.  No
+ * return value.
+ */
+void omap2_init_clk_hw_omap_clocks(struct clk *clk)
 {
-        if (!clk->clksel)
-                return -EINVAL;
+        struct clk_hw_omap *c;
 
-        if (clk->parent == new_parent)
-                return 0;
+        if (__clk_get_flags(clk) & CLK_IS_BASIC)
+                return;
 
-        return omap2_clksel_set_parent(clk, new_parent);
+        c = to_clk_hw_omap(__clk_get_hw(clk));
+        list_add(&c->node, &clk_hw_omap_clocks);
 }
 
-/*
- * OMAP2+ clock reset and init functions
+/**
+ * omap2_clk_enable_autoidle_all - enable autoidle on all OMAP clocks that
+ * support it
+ *
+ * Enable clock autoidle on all OMAP clocks that have allow_idle
+ * function pointers associated with them.  This function is intended
+ * to be temporary until support for this is added to the common clock
+ * code.  Returns 0.
  */
+int omap2_clk_enable_autoidle_all(void)
+{
+        struct clk_hw_omap *c;
 
-#ifdef CONFIG_OMAP_RESET_CLOCKS
-void omap2_clk_disable_unused(struct clk *clk)
+        list_for_each_entry(c, &clk_hw_omap_clocks, node)
+                if (c->ops && c->ops->allow_idle)
+                        c->ops->allow_idle(c);
+        return 0;
+}
+
+/**
+ * omap2_clk_disable_autoidle_all - disable autoidle on all OMAP clocks that
+ * support it
+ *
+ * Disable clock autoidle on all OMAP clocks that have allow_idle
+ * function pointers associated with them.  This function is intended
+ * to be temporary until support for this is added to the common clock
+ * code.  Returns 0.
+ */
+int omap2_clk_disable_autoidle_all(void)
 {
-        u32 regval32, v;
+        struct clk_hw_omap *c;
 
-        v = (clk->flags & INVERT_ENABLE) ? (1 << clk->enable_bit) : 0;
+        list_for_each_entry(c, &clk_hw_omap_clocks, node)
+                if (c->ops && c->ops->deny_idle)
+                        c->ops->deny_idle(c);
+        return 0;
+}
 
-        regval32 = __raw_readl(clk->enable_reg);
-        if ((regval32 & (1 << clk->enable_bit)) == v)
-                return;
+/**
+ * omap2_clk_enable_init_clocks - prepare & enable a list of clocks
+ * @clk_names: ptr to an array of strings of clock names to enable
+ * @num_clocks: number of clock names in @clk_names
+ *
+ * Prepare and enable a list of clocks, named by @clk_names.  No
+ * return value. XXX Deprecated; only needed until these clocks are
+ * properly claimed and enabled by the drivers or core code that uses
+ * them.  XXX What code disables & calls clk_put on these clocks?
+ */
+void omap2_clk_enable_init_clocks(const char **clk_names, u8 num_clocks)
+{
+        struct clk *init_clk;
+        int i;
 
-        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);
+        for (i = 0; i < num_clocks; i++) {
+                init_clk = clk_get(NULL, clk_names[i]);
+                clk_prepare_enable(init_clk);
         }
-        if (clk->clkdm != NULL)
-                pwrdm_state_switch(clk->clkdm->pwrdm.ptr);
 }
-#endif
+
+const struct clk_hw_omap_ops clkhwops_wait = {
+        .find_idlest    = omap2_clk_dflt_find_idlest,
+        .find_companion = omap2_clk_dflt_find_companion,
+};
 
 /**
  * omap2_clk_switch_mpurate_at_boot - switch ARM MPU rate by boot-time argument
@@ -512,14 +598,12 @@ int __init omap2_clk_switch_mpurate_at_boot(const char *mpurate_ck_name)
         r = clk_set_rate(mpurate_ck, mpurate);
         if (IS_ERR_VALUE(r)) {
                 WARN(1, "clock: %s: unable to set MPU rate to %d: %d\n",
-                     mpurate_ck->name, mpurate, r);
+                     mpurate_ck_name, mpurate, r);
                 clk_put(mpurate_ck);
                 return -EINVAL;
         }
 
         calibrate_delay();
-        recalculate_root_clocks();
-
         clk_put(mpurate_ck);
 
         return 0;
@@ -563,513 +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));
 }
-
-/* 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) */
-