[PATCH 3/3] clk: qcom: smd-rpm: Add .is_prepared hook

Shawn Guo
2021-11-09T02:26:19Z

The RPM clocks are enabled/disabled through clk framework prepare/unprepare
hooks. Without .is_prepared hook, those unused RPM clocks will not be
disabled by core function clk_unprepare_unused_subtree(), because
clk_core_is_prepared() always returns 0.

Add .is_prepared hook to clk_ops and return the clock prepare (enable)
state, so that those unused RPM clocks can be disabled by clk framework.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
---
drivers/clk/qcom/clk-smd-rpm.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/drivers/clk/qcom/clk-smd-rpm.c b/drivers/clk/qcom/clk-smd-rpm.c
index f8be58121bd6..c8f058720e66 100644
--- a/drivers/clk/qcom/clk-smd-rpm.c
+++ b/drivers/clk/qcom/clk-smd-rpm.c
@@ -409,6 +409,13 @@ static int clk_smd_rpm_is_enabled(struct clk_hw *hw)
return r->enabled;
}

+static int clk_smd_rpm_is_prepared(struct clk_hw *hw)
+{
+ struct clk_smd_rpm *r = to_clk_smd_rpm(hw);
+
+ return r->enabled;
+}
+
static const struct clk_ops clk_smd_rpm_ops = {
.prepare = clk_smd_rpm_prepare,
.unprepare = clk_smd_rpm_unprepare,
@@ -416,6 +423,7 @@ static const struct clk_ops clk_smd_rpm_ops = {
.round_rate = clk_smd_rpm_round_rate,
.recalc_rate = clk_smd_rpm_recalc_rate,
.is_enabled = clk_smd_rpm_is_enabled,
+ .is_prepared = clk_smd_rpm_is_prepared,
};

static const struct clk_ops clk_smd_rpm_branch_ops = {
@@ -423,6 +431,7 @@ static const struct clk_ops clk_smd_rpm_branch_ops = {
.unprepare = clk_smd_rpm_unprepare,
.recalc_rate = clk_smd_rpm_recalc_rate,
.is_enabled = clk_smd_rpm_is_enabled,
+ .is_prepared = clk_smd_rpm_is_prepared,
};

DEFINE_CLK_SMD_RPM(msm8916, pcnoc_clk, pcnoc_a_clk, QCOM_SMD_RPM_BUS_CLK, 0);
--
2.17.1