[PATCH 4/6] clockdomain: add clkdm_get_pwrdm()

[Paul Walmsley <paul@pwsan.com>]

Add clkdm_get_pwrdm() to the clockdomain code.  It will return a
pointer to the powerdomain struct that the clockdomain is contained
within.  Used by the PM code.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
---

 arch/arm/mach-omap2/clockdomain.c       |   16 ++++++++++++++++
 include/asm-arm/arch-omap/clockdomain.h |    5 +++--
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-omap2/clockdomain.c b/arch/arm/mach-omap2/clockdomain.c
index ca944ec..6e5f892 100644
--- a/arch/arm/mach-omap2/clockdomain.c
+++ b/arch/arm/mach-omap2/clockdomain.c
@@ -315,6 +315,22 @@ int clkdm_for_each(int (*fn)(struct clockdomain *clkdm))
 }
 
 
+/**
+ * clkdm_get_pwrdm - return a ptr to the pwrdm that this clkdm resides in
+ * @clkdm: struct clockdomain *
+ *
+ * Return a pointer to the struct powerdomain that the specified clockdomain
+ * 'clkdm' exists in, or returns NULL if clkdm argument is NULL.
+ */
+struct powerdomain *clkdm_get_pwrdm(struct clockdomain *clkdm)
+{
+	if (!clkdm)
+		return NULL;
+
+	return clkdm->pwrdm;
+}
+
+
 /* Hardware clockdomain control */
 
 /**
diff --git a/include/asm-arm/arch-omap/clockdomain.h b/include/asm-arm/arch-omap/clockdomain.h
index e4280bd..d2a4551 100644
--- a/include/asm-arm/arch-omap/clockdomain.h
+++ b/include/asm-arm/arch-omap/clockdomain.h
@@ -91,6 +91,9 @@ int clkdm_register(struct clockdomain *clkdm);
 int clkdm_unregister(struct clockdomain *clkdm);
 struct clockdomain *clkdm_lookup(const char *name);
 
+int clkdm_for_each(int (*fn)(struct clockdomain *clkdm));
+struct powerdomain *clkdm_get_pwrdm(struct clockdomain *clkdm);
+
 void omap2_clkdm_allow_idle(struct clockdomain *clkdm);
 void omap2_clkdm_deny_idle(struct clockdomain *clkdm);
 
@@ -100,6 +103,4 @@ int omap2_clkdm_sleep(struct clockdomain *clkdm);
 int omap2_clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk);
 int omap2_clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk);
 
-int clkdm_for_each(int (*fn)(struct clockdomain *clkdm));
-
 #endif