linux-kernel - Re: [PATCH 3/7] firmware: arm_scmi: imx: Support getting cfg info of MISC protocol

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Message-ID: <20250702-arrogant-jackdaw-of-skill-bb9fd3@sudeepholla>
Date: Wed, 2 Jul 2025 16:21:58 +0100
From: Sudeep Holla <sudeep.holla@....com>
To: Peng Fan <peng.fan@....com>
Cc: 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>, <arm-scmi@...r.kernel.org>,
	<imx@...ts.linux.dev>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/7] firmware: arm_scmi: imx: Support getting cfg info of
 MISC protocol

On Fri, Jun 27, 2025 at 02:03:46PM +0800, Peng Fan wrote:
> MISC protocol supports getting the System Manager(SM) mode selection
> and configuration name. Add the API for user to retrieve the information
> from SM.
> 
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
>  .../firmware/arm_scmi/vendors/imx/imx-sm-misc.c    | 30 ++++++++++++++++++++++
>  include/linux/scmi_imx_protocol.h                  |  5 ++++
>  2 files changed, 35 insertions(+)
> 
> diff --git a/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c b/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c
> index 1b24d070c6f4856b92f515fcdba5836fd6498ce6..8ce4bf92e6535af2f30d72a34717678613b35049 100644
> --- a/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c
> +++ b/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c
> @@ -26,6 +26,7 @@ enum scmi_imx_misc_protocol_cmd {
>  	SCMI_IMX_MISC_CTRL_SET	= 0x3,
>  	SCMI_IMX_MISC_CTRL_GET	= 0x4,
>  	SCMI_IMX_MISC_DISCOVER_BUILDINFO = 0x6,
> +	SCMI_IMX_MISC_CFG_INFO = 0xC,
>  	SCMI_IMX_MISC_CTRL_NOTIFY = 0x8,
>  };
>  
> @@ -73,6 +74,11 @@ struct scmi_imx_misc_buildinfo_out {
>  	u8 buildtime[MISC_MAX_BUILDTIME];
>  };
>  
> +struct scmi_imx_misc_cfg_info_out {
> +	__le32 msel;

Now, I realise, this mode select is not properly defined in the document.
Just 32-bit word. What are those values ? Any fixed list of values with
well defined modes or configurations ? If so, please add to the document.

-- 
Regards,
Sudeep