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authorJerome Brunet <jbrunet@baylibre.com>2017-12-01 22:51:53 +0100
committerMichael Turquette <mturquette@baylibre.com>2017-12-19 16:17:40 -0800
commit9e4d04adeb1a957be212aace20ac5cee6f14013c (patch)
treebc15dfef0c01d354295af44eb47046e31fd1aa19 /drivers/clk/clk.c
parent91baa9ffe6d4e8191ef55b4ece3e556294141515 (diff)
downloadlinux-9e4d04adeb1a957be212aace20ac5cee6f14013c.tar.bz2
clk: add clk_core_set_phase_nolock function
Create a core function for set_phase, as it is done for set_rate and set_parent. This rework is done to ease the integration of "protected" clock functionality. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Quentin Schulz <quentin.schulz@free-electrons.com> Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Michael Turquette <mturquette@baylibre.com> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com> Link: lkml.kernel.org/r/20171201215200.23523-4-jbrunet@baylibre.com
Diffstat (limited to 'drivers/clk/clk.c')
-rw-r--r--drivers/clk/clk.c33
1 files changed, 21 insertions, 12 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index e60b2a26b10b..7946a069ba2e 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1966,6 +1966,25 @@ int clk_set_parent(struct clk *clk, struct clk *parent)
}
EXPORT_SYMBOL_GPL(clk_set_parent);
+static int clk_core_set_phase_nolock(struct clk_core *core, int degrees)
+{
+ int ret = -EINVAL;
+
+ lockdep_assert_held(&prepare_lock);
+
+ if (!core)
+ return 0;
+
+ trace_clk_set_phase(core, degrees);
+
+ if (core->ops->set_phase)
+ ret = core->ops->set_phase(core->hw, degrees);
+
+ trace_clk_set_phase_complete(core, degrees);
+
+ return ret;
+}
+
/**
* clk_set_phase - adjust the phase shift of a clock signal
* @clk: clock signal source
@@ -1988,7 +2007,7 @@ EXPORT_SYMBOL_GPL(clk_set_parent);
*/
int clk_set_phase(struct clk *clk, int degrees)
{
- int ret = -EINVAL;
+ int ret;
if (!clk)
return 0;
@@ -1999,17 +2018,7 @@ int clk_set_phase(struct clk *clk, int degrees)
degrees += 360;
clk_prepare_lock();
-
- trace_clk_set_phase(clk->core, degrees);
-
- if (clk->core->ops->set_phase)
- ret = clk->core->ops->set_phase(clk->core->hw, degrees);
-
- trace_clk_set_phase_complete(clk->core, degrees);
-
- if (!ret)
- clk->core->phase = degrees;
-
+ ret = clk_core_set_phase_nolock(clk->core, degrees);
clk_prepare_unlock();
return ret;