linux-kernel - [PATCH v5 5/6] clk: scmi: Introduce common header for SCMI clock interface

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Message-Id: <20251009-clk-ssc-v5-1-v5-5-d6447d76171e@nxp.com>
Date: Thu, 09 Oct 2025 11:48:18 +0800
From: Peng Fan <peng.fan@....com>
To: 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>, Sudeep Holla <sudeep.holla@....com>, 
 Cristian Marussi <cristian.marussi@....com>, 
 Sebin Francis <sebin.francis@...com>, Brian Masney <bmasney@...hat.com>
Cc: Dan Carpenter <dan.carpenter@...aro.org>, 
 Geert Uytterhoeven <geert@...ux-m68k.org>, linux-kernel@...r.kernel.org, 
 linux-clk@...r.kernel.org, devicetree@...r.kernel.org, 
 arm-scmi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 Peng Fan <peng.fan@....com>
Subject: [PATCH v5 5/6] clk: scmi: Introduce common header for SCMI clock
 interface

Added a new header file 'clk-scmi.h' to define common structures and
interfaces for the SCMI clock driver. This header will also be used by
OEM-specific extensions to ensure consistency and reusability.

Moved relevant structure definitions from the driver implementation to
'clk-scmi.h' to facilitate shared usage.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 drivers/clk/clk-scmi.c | 27 +--------------------------
 drivers/clk/clk-scmi.h | 40 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+), 26 deletions(-)

diff --git a/drivers/clk/clk-scmi.c b/drivers/clk/clk-scmi.c
index 6b286ea6f1218c802d0ebb782c75a19057581c20..bf85924d61985eb9e596419349eb883e3817de73 100644
--- a/drivers/clk/clk-scmi.c
+++ b/drivers/clk/clk-scmi.c
@@ -14,32 +14,7 @@
 #include <linux/scmi_protocol.h>
 #include <asm/div64.h>
 
-#define NOT_ATOMIC	false
-#define ATOMIC		true
-
-enum scmi_clk_feats {
-	SCMI_CLK_ATOMIC_SUPPORTED,
-	SCMI_CLK_STATE_CTRL_SUPPORTED,
-	SCMI_CLK_RATE_CTRL_SUPPORTED,
-	SCMI_CLK_PARENT_CTRL_SUPPORTED,
-	SCMI_CLK_DUTY_CYCLE_SUPPORTED,
-	SCMI_CLK_FEATS_COUNT
-};
-
-#define SCMI_MAX_CLK_OPS	BIT(SCMI_CLK_FEATS_COUNT)
-
-static const struct scmi_clk_proto_ops *scmi_proto_clk_ops;
-
-struct scmi_clk {
-	u32 id;
-	struct device *dev;
-	struct clk_hw hw;
-	const struct scmi_clock_info *info;
-	const struct scmi_protocol_handle *ph;
-	struct clk_parent_data *parent_data;
-};
-
-#define to_scmi_clk(clk) container_of(clk, struct scmi_clk, hw)
+const struct scmi_clk_proto_ops *scmi_proto_clk_ops;
 
 static unsigned long scmi_clk_recalc_rate(struct clk_hw *hw,
 					  unsigned long parent_rate)
diff --git a/drivers/clk/clk-scmi.h b/drivers/clk/clk-scmi.h
new file mode 100644
index 0000000000000000000000000000000000000000..6ef6adc77c836dc2d599ff852cdc941f217ee388
--- /dev/null
+++ b/drivers/clk/clk-scmi.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *  Copyright 2025 NXP
+ */
+
+#ifndef __SCMI_CLK_H
+#define __SCMI_CLK_H
+
+#include <linux/bits.h>
+#include <linux/scmi_protocol.h>
+#include <linux/types.h>
+
+#define NOT_ATOMIC	false
+#define ATOMIC		true
+
+enum scmi_clk_feats {
+	SCMI_CLK_ATOMIC_SUPPORTED,
+	SCMI_CLK_STATE_CTRL_SUPPORTED,
+	SCMI_CLK_RATE_CTRL_SUPPORTED,
+	SCMI_CLK_PARENT_CTRL_SUPPORTED,
+	SCMI_CLK_DUTY_CYCLE_SUPPORTED,
+	SCMI_CLK_FEATS_COUNT
+};
+
+#define SCMI_MAX_CLK_OPS	BIT(SCMI_CLK_FEATS_COUNT)
+
+struct scmi_clk {
+	u32 id;
+	struct device *dev;
+	struct clk_hw hw;
+	const struct scmi_clock_info *info;
+	const struct scmi_protocol_handle *ph;
+	struct clk_parent_data *parent_data;
+};
+
+#define to_scmi_clk(clk) container_of(clk, struct scmi_clk, hw)
+
+extern const struct scmi_clk_proto_ops *scmi_proto_clk_ops;
+
+#endif

-- 
2.37.1