linux-kernel - [PATCH v2 0/2] firmware: arm_scmi/imx: Support dump syslog

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Message-Id: <20251011-sm-syslog-v2-1-v2-0-f43a3f6b32e4@nxp.com>
Date: Sat, 11 Oct 2025 19:33:41 +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: Dan Carpenter <dan.carpenter@...aro.org>, Frank Li <frank.li@....com>, 
 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 v2 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 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                     | 38 +++++++++-
 include/linux/scmi_imx_protocol.h                  |  2 +
 3 files changed, 122 insertions(+), 1 deletion(-)
---
base-commit: 2b763d4652393c90eaa771a5164502ec9dd965ae
change-id: 20251011-sm-syslog-v2-1-51c0da2fe1d0

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