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authorMike Turquette <mturquette@linaro.org>2014-02-18 21:21:25 -0800
committerMaxime Ripard <maxime.ripard@free-electrons.com>2014-09-27 08:57:38 +0200
commite59c5371fb9d8268d1c043172e88cecab9dc934f (patch)
tree54acf05ccfffdc1dc17dd3c0adb92f54332e0bb0 /include/linux/clk-provider.h
parentcfe4c93b58924b3764cd7269d3d953049405e938 (diff)
downloadlwn-e59c5371fb9d8268d1c043172e88cecab9dc934f.tar.gz
lwn-e59c5371fb9d8268d1c043172e88cecab9dc934f.zip
clk: introduce clk_set_phase function & callback
A common operation for a clock signal generator is to shift the phase of that signal. This patch introduces a new function to the clk.h API to dynamically adjust the phase of a clock signal. Additionally this patch introduces support for the new function in the common clock framework via the .set_phase call back in struct clk_ops. Signed-off-by: Mike Turquette <mturquette@linaro.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'include/linux/clk-provider.h')
-rw-r--r--include/linux/clk-provider.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 411dd7eb2653..201a6195a3eb 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -129,6 +129,10 @@ struct dentry;
* set then clock accuracy will be initialized to parent accuracy
* or 0 (perfect clock) if clock has no parent.
*
+ * @set_phase: Shift the phase this clock signal in degrees specified
+ * by the second argument. Valid values for degrees are
+ * 0-359. Return 0 on success, otherwise -EERROR.
+ *
* @init: Perform platform-specific initialization magic.
* This is not not used by any of the basic clock types.
* Please consider other ways of solving initialization problems
@@ -177,6 +181,7 @@ struct clk_ops {
unsigned long parent_rate, u8 index);
unsigned long (*recalc_accuracy)(struct clk_hw *hw,
unsigned long parent_accuracy);
+ int (*set_phase)(struct clk_hw *hw, int degrees);
void (*init)(struct clk_hw *hw);
int (*debug_init)(struct clk_hw *hw, struct dentry *dentry);
};