linux-kernel - RE: [PATCH v4 5/7] firmware: imx: Add i.MX95 SCMI LMM driver

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Message-ID:
 <PAXPR04MB8459195AAF65D38AFA1D4F9688B32@PAXPR04MB8459.eurprd04.prod.outlook.com>
Date: Mon, 14 Apr 2025 09:57:43 +0000
From: Peng Fan <peng.fan@....com>
To: Sudeep Holla <sudeep.holla@....com>, "Peng Fan (OSS)"
	<peng.fan@....nxp.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>, Rob
 Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor
 Dooley <conor+dt@...nel.org>, Dan Carpenter <dan.carpenter@...aro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"arm-scmi@...r.kernel.org" <arm-scmi@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "imx@...ts.linux.dev"
	<imx@...ts.linux.dev>, "devicetree@...r.kernel.org"
	<devicetree@...r.kernel.org>
Subject: RE: [PATCH v4 5/7] firmware: imx: Add i.MX95 SCMI LMM driver

Hi Sudeep,

> Subject: Re: [PATCH v4 5/7] firmware: imx: Add i.MX95 SCMI LMM
> driver
> 
> On Tue, Apr 08, 2025 at 04:44:29PM +0800, Peng Fan (OSS) wrote:
> > From: Peng Fan <peng.fan@....com>
> >
> > The i.MX95 System manager exports SCMI LMM protocol for linux to
> > manage Logical Machines. The driver is to use the LMM Protocol
> > interface to boot, shutdown a LM.
> >
> > Reviewed-by: Cristian Marussi <cristian.marussi@....com>
> > Signed-off-by: Peng Fan <peng.fan@....com>
> > ---
> >  drivers/firmware/arm_scmi/vendors/imx/Kconfig |  3 +-
> >  drivers/firmware/imx/Kconfig                  | 11 ++++
> >  drivers/firmware/imx/Makefile                 |  1 +
> >  drivers/firmware/imx/sm-lmm.c                 | 91
> +++++++++++++++++++++++++++
> >  include/linux/firmware/imx/sm.h               | 14 +++++
> >  5 files changed, 119 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/firmware/arm_scmi/vendors/imx/Kconfig
> > b/drivers/firmware/arm_scmi/vendors/imx/Kconfig
> > index
> >
> b5f13d0e40155e485f4d1696e9550645d888ef44..4c24e17425f83081
> 0f8ba376ece9
> > db93c8cded6d 100644
> > --- a/drivers/firmware/arm_scmi/vendors/imx/Kconfig
> > +++ b/drivers/firmware/arm_scmi/vendors/imx/Kconfig
> > @@ -26,7 +26,8 @@ config IMX_SCMI_CPU_EXT  config
> IMX_SCMI_LMM_EXT
> >  	tristate "i.MX SCMI LMM EXTENSION"
> >  	depends on ARM_SCMI_PROTOCOL || (COMPILE_TEST && OF)
> > -	default y if ARCH_MXC
> > +	depends on IMX_SCMI_LMM_DRV
> > +	default y if ARCH_MXC && ARM64
> 
> I can't understand the ARM64 dependency on this and next patch.

ARCH_MXC both supports ARM32 and ARM64.

To i.MX ARM32 platform, there is no plan to enable SCMI, so only
set y for ARCH_MXC ARM64 platforms.

Thanks,
Peng.

> 
> --
> Regards,
> Sudeep