linux-kernel - Re: [PATCH v4 3/7] firmware: arm_scmi: imx: Add i.MX95 LMM protocol

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Message-ID: <b85cd7c9-1747-4f8d-82e5-5bf734263566@stanley.mountain>
Date: Tue, 8 Apr 2025 12:21:56 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc: 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>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-kernel@...r.kernel.org,
	arm-scmi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	imx@...ts.linux.dev, devicetree@...r.kernel.org,
	Peng Fan <peng.fan@....com>
Subject: Re: [PATCH v4 3/7] firmware: arm_scmi: imx: Add i.MX95 LMM protocol

On Tue, Apr 08, 2025 at 04:44:27PM +0800, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@....com>
> 
> Add Logical Machine Management(LMM) protocol which is intended for boot,
> shutdown, and reset of other logical machines (LM). It is usually used to
> allow one LM to manager another used as an offload or accelerator engine.
> 
> Reviewed-by: Cristian Marussi <cristian.marussi@....com>
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
>  drivers/firmware/arm_scmi/vendors/imx/Kconfig      |  11 +
>  drivers/firmware/arm_scmi/vendors/imx/Makefile     |   1 +
>  drivers/firmware/arm_scmi/vendors/imx/imx-sm-lmm.c | 262 +++++++++++++++++++++
>  include/linux/scmi_imx_protocol.h                  |  32 +++
>  4 files changed, 306 insertions(+)
> 
> diff --git a/drivers/firmware/arm_scmi/vendors/imx/Kconfig b/drivers/firmware/arm_scmi/vendors/imx/Kconfig
> index a01bf5e47301d2f93c9bfc7eebc77e083ea4ed75..1a936fc87d2350e2a21bccd45dfbeebfa3b90286 100644
> --- a/drivers/firmware/arm_scmi/vendors/imx/Kconfig
> +++ b/drivers/firmware/arm_scmi/vendors/imx/Kconfig
> @@ -12,6 +12,17 @@ config IMX_SCMI_BBM_EXT
>  	  To compile this driver as a module, choose M here: the
>  	  module will be called imx-sm-bbm.
>  
> +config IMX_SCMI_LMM_EXT
> +	tristate "i.MX SCMI LMM EXTENSION"
> +	depends on ARM_SCMI_PROTOCOL || (COMPILE_TEST && OF)
> +	default y if ARCH_MXC
> +	help
> +	  This enables i.MX System Logical Machine Protocol to
> +	  manage Logical Machines boot, shutdown and etc.
> +
> +	  To compile this driver as a module, choose M here: the
> +	  module will be called imx-sm-lmm.
> +

Remind me again what happens if you have both the default and the
extension modules enabled?

regards,
dan carpenter