From ecde921eb46022acbdbfff2ad4e4c6e6d0493430 Mon Sep 17 00:00:00 2001 From: Cristian Marussi Date: Fri, 8 May 2026 16:32:47 +0100 Subject: firmware: arm_scmi: Add clock determine_rate operation Add a clock operation to help determining the effective rate, closest to the required one, that a specific clock can support. Calculation is currently performed kernel side and the logic is taken directly from the SCMI Clock driver: embedding the determinate rate logic in the protocol layer enables simplifications in the SCMI Clock protocol interface and will more easily accommodate further evolutions where such determine_rate logic into is optionally delegated to the platform SCMI server. Signed-off-by: Cristian Marussi Tested-by: Florian Fainelli Tested-by: Geert Uytterhoeven Link: https://patch.msgid.link/20260508153300.2224715-3-cristian.marussi@arm.com Signed-off-by: Sudeep Holla --- include/linux/scmi_protocol.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include') diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h index 8d0b106caed8..984117f51695 100644 --- a/include/linux/scmi_protocol.h +++ b/include/linux/scmi_protocol.h @@ -91,6 +91,10 @@ enum scmi_clock_oem_config { * @info_get: get the information of the specified clock * @rate_get: request the current clock rate of a clock * @rate_set: set the clock rate of a clock + * @determine_rate: determine the effective rate that can be supported by a + * clock calculating the closest allowed rate. + * Note that @rate is an input/output parameter used both to + * describe the requested rate and report the closest match * @enable: enables the specified clock * @disable: disables the specified clock * @state_get: get the status of the specified clock @@ -108,6 +112,8 @@ struct scmi_clk_proto_ops { u64 *rate); int (*rate_set)(const struct scmi_protocol_handle *ph, u32 clk_id, u64 rate); + int (*determine_rate)(const struct scmi_protocol_handle *ph, u32 clk_id, + unsigned long *rate); int (*enable)(const struct scmi_protocol_handle *ph, u32 clk_id, bool atomic); int (*disable)(const struct scmi_protocol_handle *ph, u32 clk_id, -- cgit v1.2.3