From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.7 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS, URIBL_BLOCKED,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 16FCBC10F14 for ; Sun, 21 Apr 2019 07:40:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D9DDC2147C for ; Sun, 21 Apr 2019 07:40:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1555832428; bh=Pb6r3vWA/DTvoY0vZsBOP1/4gpXHCnVCuOnEawkWSNQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=kH4X+mLIH14T0AiPvtOxzJ8Wwcn0flQ6KLmh+HgJIaDxNegYxMhg4r8Y7K6Tz3XWf 3wVu/vllHWNToGhnugDysXIyMf5Ew9sE71Dbg8CH1emOGgNsdlmx8u5F7e3fq1WF6Z 3o/HiKZ/79eFDSzgUnT8Bi0UZLF6honX6fhD0SZ8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726869AbfDUHk1 (ORCPT ); Sun, 21 Apr 2019 03:40:27 -0400 Received: from mail.kernel.org ([198.145.29.99]:60900 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725936AbfDUHk1 (ORCPT ); Sun, 21 Apr 2019 03:40:27 -0400 Received: from dragon (98.142.130.235.16clouds.com [98.142.130.235]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 336842087F; Sun, 21 Apr 2019 07:40:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1555832426; bh=Pb6r3vWA/DTvoY0vZsBOP1/4gpXHCnVCuOnEawkWSNQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=b0pcba+m8lOH685aoS1r2KLDj6By0mI9FJ6Fjb7oz31ze/Azf0ervTA2doN/WWkec xpnywYh2M+q0vaCz7yisMjYTAf2APzqGANlrQ8kT+4EaSNDfX2JeoGycFaQqvjtVcQ GgHebgD8Rr6tcZo+zxrS3WQrSfLoYECGqlIYnkC0= Date: Sun, 21 Apr 2019 15:40:00 +0800 From: Shawn Guo To: Anson Huang Cc: "catalin.marinas@arm.com" , "will.deacon@arm.com" , "s.hauer@pengutronix.de" , "kernel@pengutronix.de" , "festevam@gmail.com" , "heiko@sntech.de" , "horms+renesas@verge.net.au" , "olof@lixom.net" , Andy Gross , "bjorn.andersson@linaro.org" , "jagan@amarulasolutions.com" , "enric.balletbo@collabora.com" , "stefan.wahren@i2se.com" , "ezequiel@collabora.com" , "marc.w.gonzalez@free.fr" , "robh@kernel.org" , "l.stach@pengutronix.de" , Abel Vesa , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , dl-linux-imx Subject: Re: [PATCH 1/2] soc: imx-sc: add i.MX system controller soc driver support Message-ID: <20190421073958.GC19962@dragon> References: <1554965048-19450-1-git-send-email-Anson.Huang@nxp.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1554965048-19450-1-git-send-email-Anson.Huang@nxp.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 > --- > 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. Shawn