linux-kernel - [PATCH 09/14] clk: qcom: gdsc: add separate sleep state collapse vote support

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Message-Id: <20241017-sar2130p-clocks-v1-9-f75e740f0a8d@linaro.org>
Date: Thu, 17 Oct 2024 19:56:59 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>, 
 Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Taniya Das <quic_tdas@...cinc.com>, 
 Neil Armstrong <neil.armstrong@...aro.org>, 
 Philipp Zabel <p.zabel@...gutronix.de>, 
 Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 09/14] clk: qcom: gdsc: add separate sleep state collapse
 vote support

Some platforms use separate collapse vote registers for the active and
sleep states. Extend gdsc_update_collapse_bit() to support separate
collapse_sleep_ctrl register.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
 drivers/clk/qcom/gdsc.c | 8 ++++++++
 drivers/clk/qcom/gdsc.h | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/drivers/clk/qcom/gdsc.c b/drivers/clk/qcom/gdsc.c
index fa5fe4c2a2ee7786c2e8858f3e41301f639e5d59..95f8e90a8d25673c8a97a03f92cbdad25c3259db 100644
--- a/drivers/clk/qcom/gdsc.c
+++ b/drivers/clk/qcom/gdsc.c
@@ -133,6 +133,14 @@ static int gdsc_update_collapse_bit(struct gdsc *sc, bool val)
 	if (ret)
 		return ret;
 
+	if (sc->collapse_sleep_ctrl) {
+		ret = regmap_update_bits(sc->regmap, sc->collapse_sleep_ctrl, mask, val ? mask : 0);
+		if (ret) {
+			regmap_update_bits(sc->regmap, reg, mask, val ? 0 : mask);
+			return ret;
+		}
+	}
+
 	return 0;
 }
 
diff --git a/drivers/clk/qcom/gdsc.h b/drivers/clk/qcom/gdsc.h
index 1e2779b823d1c8ca077c9b4cd0a0dbdf5f9457ef..dab2e31be8f65408d6d29df42ad5105830760d3e 100644
--- a/drivers/clk/qcom/gdsc.h
+++ b/drivers/clk/qcom/gdsc.h
@@ -19,6 +19,7 @@ struct reset_controller_dev;
  * @regmap: regmap for MMIO accesses
  * @gdscr: gsdc control register
  * @collapse_ctrl: APCS collapse-vote register
+ * @collapse_sleep_ctrl: APCS collapse-vote register for the sleep state
  * @collapse_mask: APCS collapse-vote mask
  * @gds_hw_ctrl: gds_hw_ctrl register
  * @cxcs: offsets of branch registers to toggle mem/periph bits in
@@ -37,6 +38,7 @@ struct gdsc {
 	struct regmap			*regmap;
 	unsigned int			gdscr;
 	unsigned int			collapse_ctrl;
+	unsigned int			collapse_sleep_ctrl;
 	unsigned int			collapse_mask;
 	unsigned int			gds_hw_ctrl;
 	unsigned int			clamp_io_ctrl;

-- 
2.39.5