[PATCH/RFC 5/9] clk: scmi: Add scmi_clk_is_pm_clk()

[Geert Uytterhoeven]

Add a helper for querying if an SCMI clock can be used for
power-management.

Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
---
 drivers/clk/clk-scmi.c   |  9 +++++++++
 include/linux/clk/scmi.h | 17 +++++++++++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 include/linux/clk/scmi.h

diff --git a/drivers/clk/clk-scmi.c b/drivers/clk/clk-scmi.c
index 7c562559ad8bb47f..20e6da1859290b75 100644
--- a/drivers/clk/clk-scmi.c
+++ b/drivers/clk/clk-scmi.c
@@ -7,6 +7,7 @@
 
 #include <linux/bits.h>
 #include <linux/clk-provider.h>
+#include <linux/clk/scmi.h>
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/of.h>
@@ -364,6 +365,14 @@ scmi_clk_ops_select(struct scmi_clk *sclk, bool atomic_capable,
 	return ops;
 }
 
+bool scmi_clk_is_pm_clk(struct clk *clk)
+{
+	struct clk_hw *hw = __clk_get_hw(clk);
+
+	return hw && to_scmi_clk(hw)->info->pm_clk;
+}
+EXPORT_SYMBOL_GPL(scmi_clk_is_pm_clk);
+
 static int scmi_clocks_probe(struct scmi_device *sdev)
 {
 	int idx, count, err;
diff --git a/include/linux/clk/scmi.h b/include/linux/clk/scmi.h
new file mode 100644
index 0000000000000000..12c338598d09296f
--- /dev/null
+++ b/include/linux/clk/scmi.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __LINUX_CLK_SCMI_H_
+#define __LINUX_CLK_SCMI_H_
+
+#include <linux/types.h>
+
+struct clk;
+
+#if IS_ENABLED(CONFIG_COMMON_CLK_SCMI)
+bool scmi_clk_is_pm_clk(struct clk *clk);
+#else
+static inline bool scmi_clk_is_pm_clk(struct clk *clk) { return false; }
+#endif
+
+#endif /* __LINUX_CLK_SCMI_H_ */
-- 
2.43.0