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| author | Cristian Marussi <cristian.marussi@arm.com> | 2026-05-08 18:32:47 +0300 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@kernel.org> | 2026-05-12 17:29:10 +0300 |
| commit | ecde921eb46022acbdbfff2ad4e4c6e6d0493430 (patch) | |
| tree | 5c4a830cb0a83c5a649f79337ebd9d8a345e8bc0 /include | |
| parent | d0c81a38d06d446d341532700b3a4a43d3b00eb1 (diff) | |
| download | linux-ecde921eb46022acbdbfff2ad4e4c6e6d0493430.tar.xz | |
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 <cristian.marussi@arm.com>
Tested-by: Florian Fainelli <florian.fainelli@broadcom.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260508153300.2224715-3-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/scmi_protocol.h | 6 |
1 files changed, 6 insertions, 0 deletions
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, |