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authorRajendra Nayak <rnayak@ti.com>2012-06-01 10:32:49 +0200
committerPaul Walmsley <paul@pwsan.com>2012-11-13 03:10:18 +0100
commit23fb8ba3a8f55f28a7a89b64b3711fcf72239d7f (patch)
treefcc04341ecf1d9c6a20261f3669a25a35506a246 /arch/arm/mach-omap2/clock.c
parentARM: OMAP2xxx: clock: add APLL rate recalculation functions (diff)
downloadlinux-23fb8ba3a8f55f28a7a89b64b3711fcf72239d7f.tar.xz
linux-23fb8ba3a8f55f28a7a89b64b3711fcf72239d7f.zip
ARM: OMAP: clock: list all clk_hw_omap clks to enable/disable autoidle
Platforms can call omap2_init_clk_hw_omap_clocks() to register a clock using clk_hw_omap. omap2_clk_enable_autoidle_all() and omap2_clk_disable_autoidle_all() can then be used to run through all the clocks which support autoidle to enable/disable them. Signed-off-by: Rajendra Nayak <rnayak@ti.com> Signed-off-by: Mike Turquette <mturquette@ti.com> [paul@pwsan.com: added kerneldoc on non-trivial new functions] Signed-off-by: Paul Walmsley <paul@pwsan.com>
Diffstat (limited to 'arch/arm/mach-omap2/clock.c')
-rw-r--r--arch/arm/mach-omap2/clock.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c
index 72d7105b3c7d..c64203e55d19 100644
--- a/arch/arm/mach-omap2/clock.c
+++ b/arch/arm/mach-omap2/clock.c
@@ -66,6 +66,7 @@ static DEFINE_SPINLOCK(clockfw_lock);
#endif
#ifdef CONFIG_COMMON_CLK
+static LIST_HEAD(clk_hw_omap_clocks);
/*
* Used for clocks that have the same value as the parent clock,
@@ -521,6 +522,64 @@ static int __init omap_clk_setup(char *str)
}
__setup("mpurate=", omap_clk_setup);
+/**
+ * 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)
+{
+ struct clk_hw_omap *c;
+
+ if (__clk_get_flags(clk) & CLK_IS_BASIC)
+ return;
+
+ c = to_clk_hw_omap(__clk_get_hw(clk));
+ list_add(&c->node, &clk_hw_omap_clocks);
+}
+
+/**
+ * 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;
+
+ 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)
+{
+ struct clk_hw_omap *c;
+
+ list_for_each_entry(c, &clk_hw_omap_clocks, node)
+ if (c->ops && c->ops->deny_idle)
+ c->ops->deny_idle(c);
+ return 0;
+}
+
const struct clk_hw_omap_ops clkhwops_wait = {
.find_idlest = omap2_clk_dflt_find_idlest,
.find_companion = omap2_clk_dflt_find_companion,