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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A1592C83F03 for ; Fri, 4 Jul 2025 10:54:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=Nijyer/7Y6vD7zp8i11o3bIcjsjcxjMUKY6PIdhJnoI=; b=Tuosbi/6x0BdjPAJHmayNJCuk/ /aIlDSJBqytGCe46L76oYcIadPyIjj8A1sjDop8FHmAj+eDFHrB927O7FF6Ljt8+hKwGVcyovv4Y+ INp6a4xLQogqhnLBT/r187rh2RfjOMJLus7BzdigK7qjj7pe/eu1ORiHCRqYRH+TfAIlIcNYkICfL InLHcaJkU4aSKIVmiLPwW1CkoGcMku9JBOq+2A7ajrv6SHRU4cJHVO6BEugJQrsUyMPolVRm+qCpH sxGUSouw0yzrfLdKbtZJwwR3uLSGXuFjp3lGxRG61Cw9VwYSRbGoNeZRaD7TVsv385WeZwWpi23lp KqD/HHZg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uXe3e-0000000E7xq-0Fjq; Fri, 04 Jul 2025 10:54:18 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uXcmd-0000000DwTS-3F3Z for linux-arm-kernel@lists.infradead.org; Fri, 04 Jul 2025 09:32:40 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 29715152B; Fri, 4 Jul 2025 02:32:25 -0700 (PDT) Received: from bogus (e133711.arm.com [10.1.196.55]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 2EAEA3F6A8; Fri, 4 Jul 2025 02:32:37 -0700 (PDT) Date: Fri, 4 Jul 2025 10:32:34 +0100 From: Sudeep Holla To: Peng Fan Cc: Peng Fan , Cristian Marussi , Sudeep Holla , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , , , , Subject: Re: [PATCH 4/7] firmware: arm_scmi: imx: Support getting silicon info of MISC protocol Message-ID: References: <20250627-sm-misc-api-v1-v1-0-2b99481fe825@nxp.com> <20250627-sm-misc-api-v1-v1-4-2b99481fe825@nxp.com> <20250702-sceptical-caracal-of-drama-3cbc63@sudeepholla> <20250704102057.GD4525@nxa18884-linux> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250704102057.GD4525@nxa18884-linux> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250704_023239_898549_6F734C40 X-CRM114-Status: GOOD ( 23.58 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Jul 04, 2025 at 06:20:57PM +0800, Peng Fan wrote: > On Wed, Jul 02, 2025 at 04:22:11PM +0100, Sudeep Holla wrote: > >On Fri, Jun 27, 2025 at 02:03:47PM +0800, Peng Fan wrote: > >> MISC protocol supports getting the silicon information including revision > >> number, part number and etc. Add the API for user to retrieve the > >> information from SM. > >> > >> Signed-off-by: Peng Fan > >> --- > >> .../firmware/arm_scmi/vendors/imx/imx-sm-misc.c | 34 ++++++++++++++++++++++ > >> include/linux/scmi_imx_protocol.h | 8 +++++ > >> 2 files changed, 42 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 8ce4bf92e6535af2f30d72a34717678613b35049..d5b24bc4d4ca6c19f4cddfaea6e9d9b32a4c92f7 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_SI_INFO = 0xB, > > > >Again, this seem to have slipped through in my initial review. How is this > >different from SMCCC SOC_ID interface. I am OK to have it as part of your > >vendor extensions and be here in the kernel documentation. But I won't > >accept any users of this within the kernel. Please provide justification > >as why you can't use the standard SMCCC SOC_ID. > > > >So, clear NACK for adding this support in the kernel for now. > > What I do here is just wanna to let > linux could print similar information as what SM shows in its console: > Sure you can dump whatever you want on the console. The main concern is another user interface for very similar information that can be obtained by SOC_ID or soc_device in the kernel. Just kernel internal use should be fine. > >$ info > SM Version = Build 677, Commit 49a36aaf > SM Config = mx95evk, mSel=0 > Board = i.MX95 EVK, attr=0x00000000 > Silicon = i.MX95 B0 > Boot mode = normal > Boot device = SD2 > Boot stage = primary > Boot set = 1 > ECID = 0x7BADEECC000001D40001300963E636F1 > PMIC 0 (0x08) = 0x20, 0x09, 0x20, 0x00, 0x01 > PMIC 1 (0x2A) = 0x54, 0x22, 0x00, 0x0B > PMIC 2 (0x29) = 0x55, 0x22, 0x00, 0x0A > Compiler = gcc 14.2.1 20241119 > > With soc_device_register, dumping the silicon information needs use the > other sysfs interface. So what ? > Here with this patchset, reading one sysfs file could dump all the information. > That goes completely again the sysfs policy. Single file single value. Convince Greg otherwise, I will consider elsewhere not for this SOC_ID for sure. > But anyway, ok to drop this patch. > Thanks! -- Regards, Sudeep