kernel.git/drivers/firmware/arm_scmi, branch linux-6.18.y

firmware: arm_scmi: Fix premature SCMI_XFER_FLAG_IS_RAW clearing in raw mode

2025-10-15T14:28:49Z

The SCMI_XFER_FLAG_IS_RAW flag was being cleared prematurely in scmi_xfer_raw_put() before the transfer completion was properly acknowledged by the raw message handlers. Move the clearing of SCMI_XFER_FLAG_IS_RAW and SCMI_XFER_FLAG_CHAN_SET from scmi_xfer_raw_put() to __scmi_xfer_put() to ensure the flags remain set throughout the entire raw message processing pipeline until the transfer is returned to the free pool. Fixes: 3095a3e25d8f ("firmware: arm_scmi: Add xfer helpers to provide raw access") Suggested-by: Cristian Marussi Signed-off-by: Artem Shimko Reviewed-by: Cristian Marussi Message-Id: <20251008091057.1969260-1-a.shimko.dev@gmail.com> Signed-off-by: Sudeep Holla

firmware: arm_scmi: Skip RAW initialization on failure

2025-10-15T14:28:01Z

Avoid attempting to initialize RAW mode when the debug subsystem itself has failed to initialize, since doing so is pointless and emits misleading error messages. Signed-off-by: Cristian Marussi Message-Id: <20251014115346.2391418-3-cristian.marussi@arm.com> Signed-off-by: Sudeep Holla

include: trace: Fix inflight count helper on failed initialization

2025-10-15T14:26:41Z

Add a check to the scmi_inflight_count() helper to handle the case when the SCMI debug subsystem fails to initialize. Fixes: f8e656382b4a ("include: trace: Add tracepoint support for inflight xfer count") Signed-off-by: Cristian Marussi Message-Id: <20251014115346.2391418-2-cristian.marussi@arm.com> Signed-off-by: Sudeep Holla

firmware: arm_scmi: Account for failed debug initialization

2025-10-15T14:24:29Z

When the SCMI debug subsystem fails to initialize, the related debug root will be missing, and the underlying descriptor will be NULL. Handle this fault condition in the SCMI debug helpers that maintain metrics counters. Fixes: 0b3d48c4726e ("firmware: arm_scmi: Track basic SCMI communication debug metrics") Signed-off-by: Cristian Marussi Message-Id: <20251014115346.2391418-1-cristian.marussi@arm.com> Signed-off-by: Sudeep Holla

firmware: arm_scmi: Simplify printks with pOF format

2025-09-12T10:32:21Z

Print full device node name with %pOF format, so the code will be a bit simpler. Signed-off-by: Krzysztof Kozlowski Message-Id: <20250912092423.162497-2-krzysztof.kozlowski@linaro.org> Signed-off-by: Sudeep Holla

firmware: arm_scmi: imx: Discover MISC board info from the system manager

2025-09-09T10:26:20Z

The i.MX SCMI MISC protocol can report board information from the System Manager (SM), including a board name and board-specific attributes. Query this during protocol initialization. If the firmware does not implement BOARD_INFO, handle -EOPNOTSUPP gracefully and continue. Reviewed-by: Cristian Marussi Signed-off-by: Peng Fan Message-Id: <20250904-sm-misc-api-v1-v4-4-0bf10eaabdf1@nxp.com> Signed-off-by: Sudeep Holla

firmware: arm_scmi: imx: Support retrieving MISC protocol configuration info

2025-09-08T10:52:30Z

The MISC protocol can provide System Manager (SM) configuration information, including platform identifiers and board-specific attributes. Add support to retrieve this information during protocol initialization. If the firmware does not implement the CFG_INFO command, handle -EOPNOTSUPP gracefully and continue without failing init. Reviewed-by: Cristian Marussi Signed-off-by: Peng Fan Message-Id: <20250904-sm-misc-api-v1-v4-3-0bf10eaabdf1@nxp.com> Signed-off-by: Sudeep Holla

firmware: arm_scmi: imx: Discover MISC build info from the system manager

2025-09-08T10:52:30Z

MISC protocol can report System Manager (SM) build information (commit, build date/time, etc.). Discover those information at the init time. If the firmware doesn't support it, ignore -EOPNOTSUPP. Reviewed-by: Cristian Marussi Signed-off-by: Peng Fan Message-Id: <20250904-sm-misc-api-v1-v4-2-0bf10eaabdf1@nxp.com> Signed-off-by: Sudeep Holla

firmware: arm_scmi: imx: Add documentation for MISC_BOARD_INFO

2025-09-08T10:32:17Z

System Manager Firmware supports getting board information, add documentation for this MISC_BOARD_INFO command. Also extends the SYSLOG response to include NOT_SUPPORTED. Reviewed-by: Cristian Marussi Signed-off-by: Peng Fan Message-Id: <20250904-sm-misc-api-v1-v4-1-0bf10eaabdf1@nxp.com> Signed-off-by: Sudeep Holla

firmware: arm_scmi: quirk: Prevent writes to string constants

2025-09-02T10:23:42Z

The quirk version range is typically a string constant and must not be modified (e.g. as it may be stored in read-only memory). Attempting to do so can trigger faults such as: | Unable to handle kernel write to read-only memory at virtual | address ffffc036d998a947 Update the range parsing so that it operates on a copy of the version range string, and mark all the quirk strings as const to reduce the risk of introducing similar future issues. Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220437 Fixes: 487c407d57d6 ("firmware: arm_scmi: Add common framework to handle firmware quirks") Cc: stable@vger.kernel.org # 6.16 Cc: Cristian Marussi Reported-by: Jan Palus Signed-off-by: Johan Hovold Message-Id: <20250829132152.28218-1-johan@kernel.org> [sudeep.holla: minor commit message rewording; switch to cleanup helpers] Signed-off-by: Sudeep Holla