linux-kernel - [PATCH v4 1/8] clk: qcom: branch: Add helper functions for setting retain bits

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Message-Id: <20230130235926.2419776-2-konrad.dybcio@linaro.org>
Date:   Tue, 31 Jan 2023 00:59:19 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     linux-arm-msm@...r.kernel.org, andersson@...nel.org,
        agross@...nel.org, krzysztof.kozlowski@...aro.org
Cc:     marijn.suijten@...ainline.org,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v4 1/8] clk: qcom: branch: Add helper functions for setting retain bits

Most Qualcomm branch clocks come with a pretty usual set of bits that
can enable memory retention by means of not turning off parts of the
memory logic. Add them to the common header file and introduce helper
functions for setting them instead of using magic writes.

Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
 drivers/clk/qcom/clk-branch.h | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/drivers/clk/qcom/clk-branch.h b/drivers/clk/qcom/clk-branch.h
index 17a58119165e..d8fc7b93ef6d 100644
--- a/drivers/clk/qcom/clk-branch.h
+++ b/drivers/clk/qcom/clk-branch.h
@@ -37,6 +37,29 @@ struct clk_branch {
 	struct clk_regmap clkr;
 };
 
+/* Branch clock common bits for HLOS-owned clocks */
+#define CBCR_FORCE_MEM_CORE_ON		BIT(14)
+#define CBCR_FORCE_MEM_PERIPH_ON	BIT(13)
+#define CBCR_FORCE_MEM_PERIPH_OFF	BIT(12)
+
+static inline void qcom_branch_set_force_mem_core(struct regmap *regmap, u32 reg, bool on)
+{
+	regmap_update_bits(regmap, reg, CBCR_FORCE_MEM_CORE_ON,
+			   on ? CBCR_FORCE_MEM_CORE_ON : 0);
+}
+
+static inline void qcom_branch_set_force_periph_on(struct regmap *regmap, u32 reg, bool on)
+{
+	regmap_update_bits(regmap, reg, CBCR_FORCE_MEM_PERIPH_ON,
+			   on ? CBCR_FORCE_MEM_PERIPH_ON : 0);
+}
+
+static inline void qcom_branch_set_force_periph_off(struct regmap *regmap, u32 reg, bool on)
+{
+	regmap_update_bits(regmap, reg, CBCR_FORCE_MEM_PERIPH_OFF,
+			   on ? CBCR_FORCE_MEM_PERIPH_OFF : 0);
+}
+
 extern const struct clk_ops clk_branch_ops;
 extern const struct clk_ops clk_branch2_ops;
 extern const struct clk_ops clk_branch_simple_ops;
-- 
2.39.1