linux-kernel - [v1 1/2] clk: qcom: gdsc: Use the default transition delay for GDSCs

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Date:   Wed,  9 Feb 2022 22:55:12 +0530
From:   Taniya Das <tdas@...eaurora.org>
To:     Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette   <mturquette@...libre.com>
Cc:     Rajendra Nayak <rnayak@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        Taniya Das <tdas@...eaurora.org>
Subject: [v1 1/2] clk: qcom: gdsc: Use the default transition delay for GDSCs

Do not update the transition delay and use the default reset values.

Fixes: 45dd0e55317cc ("clk: qcom: Add support for GDSCs)
Signed-off-by: Taniya Das <tdas@...eaurora.org>
---
 drivers/clk/qcom/gdsc.c | 6 +++++-
 drivers/clk/qcom/gdsc.h | 1 +
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/qcom/gdsc.c b/drivers/clk/qcom/gdsc.c
index 7e1dd8ccfa38..e7b213450640 100644
--- a/drivers/clk/qcom/gdsc.c
+++ b/drivers/clk/qcom/gdsc.c
@@ -380,7 +380,11 @@ static int gdsc_init(struct gdsc *sc)
 	 */
 	mask = HW_CONTROL_MASK | SW_OVERRIDE_MASK |
 	       EN_REST_WAIT_MASK | EN_FEW_WAIT_MASK | CLK_DIS_WAIT_MASK;
-	val = EN_REST_WAIT_VAL | EN_FEW_WAIT_VAL | CLK_DIS_WAIT_VAL;
+
+	regmap_read(sc->regmap, sc->gdscr, &val);
+
+	if (!(sc->flags & DEFAULT_TRANSITION_DELAY))
+		val |= EN_REST_WAIT_VAL | EN_FEW_WAIT_VAL | CLK_DIS_WAIT_VAL;
 	ret = regmap_update_bits(sc->regmap, sc->gdscr, mask, val);
 	if (ret)
 		return ret;
diff --git a/drivers/clk/qcom/gdsc.h b/drivers/clk/qcom/gdsc.h
index d7cc4c21a9d4..1bd3ecdd0b0a 100644
--- a/drivers/clk/qcom/gdsc.h
+++ b/drivers/clk/qcom/gdsc.h
@@ -53,6 +53,7 @@ struct gdsc {
 #define ALWAYS_ON	BIT(6)
 #define RETAIN_FF_ENABLE	BIT(7)
 #define NO_RET_PERIPH	BIT(8)
+#define DEFAULT_TRANSITION_DELAY	BIT(9)
 	struct reset_controller_dev	*rcdev;
 	unsigned int			*resets;
 	unsigned int			reset_count;
--
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