linux-kernel - [PATCH v3 0/2] firmware: arm_scmi/imx: Support dump syslog

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Message-Id: <20251029-sm-syslog-v3-v3-0-64e14a6e3f87@nxp.com>
Date: Wed, 29 Oct 2025 20:07:00 +0800
From: Peng Fan <peng.fan@....com>
To: Sudeep Holla <sudeep.holla@....com>, 
 Cristian Marussi <cristian.marussi@....com>, 
 Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>
Cc: arm-scmi@...r.kernel.org, imx@...ts.linux.dev, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Peng Fan <peng.fan@....com>
Subject: [PATCH v3 0/2] firmware: arm_scmi/imx: Support dump syslog

This is the patch 5 and 6 from patchset [1] with switching to using raw
dump, per check with Sudeep and NXP i.MX SM firmware owner

System Manager firmware provides API to dump system log information.
So add the interface for Linux to retrieve the information.

In patch 1, I drop the two structures compared to patch 5 in [1]:
struct scmi_imx_misc_sys_sleep_rec
struct scmi_imx_misc_syslog
No other changes in this patch.

In patch 2, I switched to use debugfs to do raw dump the syslog, compared
with patch 6 in [1].

[1] https://lore.kernel.org/arm-scmi/PAXPR04MB845937237E3C1AF5A2ABA8FA880CA@PAXPR04MB8459.eurprd04.prod.outlook.com/T/#m6ed303ac9c584c6e2ab39f89359f3131b
dfcc9e5

Signed-off-by: Peng Fan <peng.fan@....com>
---
Changes in v3:
- Rebased to next-20251028
- Drop unused variable to avoid build warning reported by kernel test robot
- Link to v2: https://lore.kernel.org/arm-scmi/20251011-sm-syslog-v2-1-v2-0-f43a3f6b32e4@nxp.com/

Changes in v2:
- Rebased to next-20251010
- Patch 2: Remove the IS_ERR check for debugfs_create_dir per Dan Carpenter
           Change 'return 0' to 'return devm_add_action_or_reset'
	   Drop the size check
	   Include 'linux/sizes.h' to avoid build break
- Link to v1: https://lore.kernel.org/r/20250910-sm-syslog-v1-0-5b36f8f21da6@nxp.com

---
Peng Fan (2):
      firmware: arm_scmi: imx: Support getting syslog of MISC protocol
      firmware: imx: sm-misc: Dump syslog info

 .../firmware/arm_scmi/vendors/imx/imx-sm-misc.c    | 83 ++++++++++++++++++++++
 drivers/firmware/imx/sm-misc.c                     | 37 +++++++++-
 include/linux/scmi_imx_protocol.h                  |  2 +
 3 files changed, 121 insertions(+), 1 deletion(-)
---
base-commit: f7d2388eeec24966fc4d5cf32d706f0514f29ac5
change-id: 20251029-sm-syslog-v3-0143f85b0ce6

Best regards,
-- 
Peng Fan <peng.fan@....com>