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Diffstat (limited to 'arch/arm/mach-omap2/clockdomain.c')
-rw-r--r--arch/arm/mach-omap2/clockdomain.c78
1 files changed, 20 insertions, 58 deletions
diff --git a/arch/arm/mach-omap2/clockdomain.c b/arch/arm/mach-omap2/clockdomain.c
index f98c8ecc9ca2..dedd47e30b98 100644
--- a/arch/arm/mach-omap2/clockdomain.c
+++ b/arch/arm/mach-omap2/clockdomain.c
@@ -1147,7 +1147,21 @@ void clkdm_del_autodeps(struct clockdomain *clkdm)
/* Clockdomain-to-clock/hwmod framework interface code */
-static int _clkdm_clk_hwmod_enable(struct clockdomain *clkdm)
+/**
+ * clkdm_clk_enable - add an enabled downstream clock to this clkdm
+ * @clkdm: struct clockdomain *
+ * @clk: struct clk * of the enabled downstream clock
+ *
+ * Increment the usecount of the clockdomain @clkdm and ensure that it
+ * is awake before @clk is enabled. Intended to be called by
+ * clk_enable() code. If the clockdomain is in software-supervised
+ * idle mode, force the clockdomain to wake. If the clockdomain is in
+ * hardware-supervised idle mode, add clkdm-pwrdm autodependencies, to
+ * ensure that devices in the clockdomain can be read from/written to
+ * by on-chip processors. Returns -EINVAL if passed null pointers;
+ * returns 0 upon success or if the clockdomain is in hwsup idle mode.
+ */
+int clkdm_clk_enable(struct clockdomain *clkdm, struct clk *unused)
{
if (!clkdm || !arch_clkdm || !arch_clkdm->clkdm_clk_enable)
return -EINVAL;
@@ -1175,33 +1189,6 @@ static int _clkdm_clk_hwmod_enable(struct clockdomain *clkdm)
}
/**
- * clkdm_clk_enable - add an enabled downstream clock to this clkdm
- * @clkdm: struct clockdomain *
- * @clk: struct clk * of the enabled downstream clock
- *
- * Increment the usecount of the clockdomain @clkdm and ensure that it
- * is awake before @clk is enabled. Intended to be called by
- * clk_enable() code. If the clockdomain is in software-supervised
- * idle mode, force the clockdomain to wake. If the clockdomain is in
- * hardware-supervised idle mode, add clkdm-pwrdm autodependencies, to
- * ensure that devices in the clockdomain can be read from/written to
- * by on-chip processors. Returns -EINVAL if passed null pointers;
- * returns 0 upon success or if the clockdomain is in hwsup idle mode.
- */
-int clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk)
-{
- /*
- * XXX Rewrite this code to maintain a list of enabled
- * downstream clocks for debugging purposes?
- */
-
- if (!clk)
- return -EINVAL;
-
- return _clkdm_clk_hwmod_enable(clkdm);
-}
-
-/**
* clkdm_clk_disable - remove an enabled downstream clock from this clkdm
* @clkdm: struct clockdomain *
* @clk: struct clk * of the disabled downstream clock
@@ -1216,13 +1203,13 @@ int clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk)
*/
int clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk)
{
- if (!clkdm || !clk || !arch_clkdm || !arch_clkdm->clkdm_clk_disable)
+ if (!clkdm || !arch_clkdm || !arch_clkdm->clkdm_clk_disable)
return -EINVAL;
pwrdm_lock(clkdm->pwrdm.ptr);
/* corner case: disabling unused clocks */
- if ((__clk_get_enable_count(clk) == 0) && clkdm->usecount == 0)
+ if (clk && (__clk_get_enable_count(clk) == 0) && clkdm->usecount == 0)
goto ccd_exit;
if (clkdm->usecount == 0) {
@@ -1277,7 +1264,7 @@ int clkdm_hwmod_enable(struct clockdomain *clkdm, struct omap_hwmod *oh)
if (!oh)
return -EINVAL;
- return _clkdm_clk_hwmod_enable(clkdm);
+ return clkdm_clk_enable(clkdm, NULL);
}
/**
@@ -1300,35 +1287,10 @@ int clkdm_hwmod_disable(struct clockdomain *clkdm, struct omap_hwmod *oh)
if (cpu_is_omap24xx() || cpu_is_omap34xx())
return 0;
- /*
- * XXX Rewrite this code to maintain a list of enabled
- * downstream hwmods for debugging purposes?
- */
-
- if (!clkdm || !oh || !arch_clkdm || !arch_clkdm->clkdm_clk_disable)
+ if (!oh)
return -EINVAL;
- pwrdm_lock(clkdm->pwrdm.ptr);
-
- if (clkdm->usecount == 0) {
- pwrdm_unlock(clkdm->pwrdm.ptr);
- WARN_ON(1); /* underflow */
- return -ERANGE;
- }
-
- clkdm->usecount--;
- if (clkdm->usecount > 0) {
- pwrdm_unlock(clkdm->pwrdm.ptr);
- return 0;
- }
-
- arch_clkdm->clkdm_clk_disable(clkdm);
- pwrdm_state_switch_nolock(clkdm->pwrdm.ptr);
- pwrdm_unlock(clkdm->pwrdm.ptr);
-
- pr_debug("clockdomain: %s: disabled\n", clkdm->name);
-
- return 0;
+ return clkdm_clk_disable(clkdm, NULL);
}
/**