linux-kernel - [PATCH v3 1/3] clk: qcom: branch: Add clk_branch2_mdio

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Message-ID: <20230810115419.25539-2-quic_luoj@quicinc.com>
Date:   Thu, 10 Aug 2023 19:54:17 +0800
From:   Luo Jie <quic_luoj@...cinc.com>
To:     <andersson@...nel.org>, <agross@...nel.org>,
        <konrad.dybcio@...aro.org>, <mturquette@...libre.com>,
        <sboyd@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <catalin.marinas@....com>, <will@...nel.org>,
        <p.zabel@...gutronix.de>
CC:     <linux-arm-msm@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <quic_srichara@...cinc.com>, Luo Jie <quic_luoj@...cinc.com>
Subject: [PATCH v3 1/3] clk: qcom: branch: Add clk_branch2_mdio_ops

Add the clk_branch2_mdio_ops for supporting clock controller
where the hardware register is accessed by MDIO bus, and the
spin clock can't be used because of sleep during the MDIO
operation.

The clock is enabled by the .prepare instead of .enable when
the clk_branch2_mdio_ops is used.

Signed-off-by: Luo Jie <quic_luoj@...cinc.com>
---
 drivers/clk/qcom/clk-branch.c | 8 ++++++++
 drivers/clk/qcom/clk-branch.h | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/drivers/clk/qcom/clk-branch.c b/drivers/clk/qcom/clk-branch.c
index fc4735f74f0f..95ed55c76b62 100644
--- a/drivers/clk/qcom/clk-branch.c
+++ b/drivers/clk/qcom/clk-branch.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2013, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2023, Qualcomm Innovation Center, Inc. All rights reserved.
  */
 
 #include <linux/kernel.h>
@@ -153,3 +154,10 @@ const struct clk_ops clk_branch_simple_ops = {
 	.is_enabled = clk_is_enabled_regmap,
 };
 EXPORT_SYMBOL_GPL(clk_branch_simple_ops);
+
+const struct clk_ops clk_branch2_mdio_ops = {
+	.prepare = clk_branch2_enable,
+	.unprepare = clk_branch2_disable,
+	.is_prepared = clk_is_enabled_regmap,
+};
+EXPORT_SYMBOL_GPL(clk_branch2_mdio_ops);
diff --git a/drivers/clk/qcom/clk-branch.h b/drivers/clk/qcom/clk-branch.h
index 0cf800b9d08d..06e620968209 100644
--- a/drivers/clk/qcom/clk-branch.h
+++ b/drivers/clk/qcom/clk-branch.h
@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 /* Copyright (c) 2013, The Linux Foundation. All rights reserved. */
+/* Copyright (c) 2023, Qualcomm Innovation Center, Inc. All rights reserved. */
 
 #ifndef __QCOM_CLK_BRANCH_H__
 #define __QCOM_CLK_BRANCH_H__
@@ -85,6 +86,7 @@ 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;
 extern const struct clk_ops clk_branch2_aon_ops;
+extern const struct clk_ops clk_branch2_mdio_ops;
 
 #define to_clk_branch(_hw) \
 	container_of(to_clk_regmap(_hw), struct clk_branch, clkr)
-- 
2.17.1