ARM: OMAP: clock: Define a function to enable clocks at init

Platform code can use omap2_clk_enable_init_clocks() to enable a
list of clocks that are needed to be enabled at init.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Mike Turquette <mturquette@ti.com>
[paul@pwsan.com: added kerneldoc to non-trivial new function]
Signed-off-by: Paul Walmsley <paul@pwsan.com>

2 files changed, 22 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c
index c64203e55d19..744e6eb17b26 100644
--- a/arch/arm/mach-omap2/clock.c
+++ b/arch/arm/mach-omap2/clock.c
@@ -580,6 +580,27 @@ int omap2_clk_disable_autoidle_all(void)
         return 0;
 }
 
+/**
+ * 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;
+
+        for (i = 0; i < num_clocks; i++) {
+                init_clk = clk_get(NULL, clk_names[i]);
+                clk_prepare_enable(init_clk);
+        }
+}
+
 const struct clk_hw_omap_ops clkhwops_wait = {
         .find_idlest    = omap2_clk_dflt_find_idlest,
         .find_companion = omap2_clk_dflt_find_companion,
diff --git a/arch/arm/mach-omap2/clock.h b/arch/arm/mach-omap2/clock.h
index 20a3be77cb8b..e669fc839859 100644
--- a/arch/arm/mach-omap2/clock.h
+++ b/arch/arm/mach-omap2/clock.h
@@ -538,6 +538,7 @@ void omap2_clk_dflt_find_idlest(struct clk_hw_omap *clk,
 void omap2_init_clk_hw_omap_clocks(struct clk *clk);
 int omap2_clk_enable_autoidle_all(void);
 int omap2_clk_disable_autoidle_all(void);
+void omap2_clk_enable_init_clocks(const char **clk_names, u8 num_clocks);
 #else
 int omap2_dflt_clk_enable(struct clk *clk);
 void omap2_dflt_clk_disable(struct clk *clk);