linux-kernel - [PATCH 3/3] clk: qcom: smd-rpm: Add .is

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Message-Id: <20211109022558.14529-4-shawn.guo@linaro.org>
Date:   Tue,  9 Nov 2021 10:25:58 +0800
From:   Shawn Guo <shawn.guo@...aro.org>
To:     Stephen Boyd <sboyd@...nel.org>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Loic Poulain <loic.poulain@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, Shawn Guo <shawn.guo@...aro.org>
Subject: [PATCH 3/3] clk: qcom: smd-rpm: Add .is_prepared hook

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@...aro.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