Re: [PATCH 1/2] soc: imx-sc: add i.MX system controller soc driver support

From: Shawn Guo <shawnguo@kernel.org>
To: Anson Huang <anson.huang@nxp.com>
Cc: "stefan.wahren@i2se.com" <stefan.wahren@i2se.com>,
	"robh@kernel.org" <robh@kernel.org>,
	"festevam@gmail.com" <festevam@gmail.com>,
	"heiko@sntech.de" <heiko@sntech.de>,
	"marc.w.gonzalez@free.fr" <marc.w.gonzalez@free.fr>,
	"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
	"s.hauer@pengutronix.de" <s.hauer@pengutronix.de>,
	"olof@lixom.net" <olof@lixom.net>,
	"will.deacon@arm.com" <will.deacon@arm.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"bjorn.andersson@linaro.org" <bjorn.andersson@linaro.org>,
	Andy Gross <andy.gross@linaro.org>,
	"jagan@amarulasolutions.com" <jagan@amarulasolutions.com>,
	"kernel@pengutronix.de" <kernel@pengutronix.de>,
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	"enric.balletbo@collabora.com" <enric.balletbo@collabora.com>,
	dl-linux-imx <linux-imx@nxp.com>,
	"l.stach@pengutronix.de" <l.stach@pengutronix.de>,
	"ezequiel@collabora.com" <ezequiel@collabora.com>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>,
	Abel Vesa <abel.vesa@nxp.com>
Subject: Re: [PATCH 1/2] soc: imx-sc: add i.MX system controller soc driver support
Date: Sun, 21 Apr 2019 15:41:54 +0800	[thread overview]
Message-ID: <20190421074152.GD19962@dragon> (raw)
In-Reply-To: <20190421073958.GC19962@dragon>

On Sun, Apr 21, 2019 at 03:40:00PM +0800, Shawn Guo wrote:
> On Thu, Apr 11, 2019 at 06:49:12AM +0000, Anson Huang wrote:
> > i.MX8QXP is an ARMv8 SoC which has a Cortex-M4 system controller
> > inside, the system controller is in charge of controlling power,
> > clock and fuse etc..
> > 
> > This patch adds i.MX system controller soc driver support,
> > Linux kernel has to communicate with system controller via MU
> > (message unit) IPC to get soc revision, uid etc..
> > 
> > With this patch, soc info can be read from sysfs:
> > 
> > i.mx8qxp-mek# cat /sys/devices/soc0/family
> > Freescale i.MX
> > 
> > i.mx8qxp-mek# cat /sys/devices/soc0/soc_id
> > i.MX8QXP
> > 
> > i.mx8qxp-mek# cat /sys/devices/soc0/machine
> > Freescale i.MX8QXP MEK
> > 
> > i.mx8qxp-mek# cat /sys/devices/soc0/revision
> > 1.1
> > 
> > i.mx8qxp-mek# cat /sys/devices/soc0/soc_uid
> > 7B64280B57AC1898
> > 
> > Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
> > ---
> >  drivers/soc/imx/Kconfig      |   7 ++
> >  drivers/soc/imx/Makefile     |   1 +
> >  drivers/soc/imx/soc-imx-sc.c | 220 +++++++++++++++++++++++++++++++++++++++++++
> >  3 files changed, 228 insertions(+)
> >  create mode 100644 drivers/soc/imx/soc-imx-sc.c
> 
> Rather than creating a new driver, please take a look at Abel's generic
> i.MX8 SoC driver, and see if it can be extended to cover i.MX8QXP.

Forgot to give pointer to Abel's driver.

https://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux.git/commit/?h=imx/drivers&id=a7e26f356ca12906a164d83c9e9f8527ee7da022

Shawn

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