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=-8.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT 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 84F8AC4646B for ; Wed, 26 Jun 2019 07:42:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6A77A2086D for ; Wed, 26 Jun 2019 07:42:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726961AbfFZHm0 (ORCPT ); Wed, 26 Jun 2019 03:42:26 -0400 Received: from inva020.nxp.com ([92.121.34.13]:38676 "EHLO inva020.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726823AbfFZHmY (ORCPT ); Wed, 26 Jun 2019 03:42:24 -0400 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 2A5131A099E; Wed, 26 Jun 2019 09:42:23 +0200 (CEST) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id D78F81A0997; Wed, 26 Jun 2019 09:42:17 +0200 (CEST) Received: from mega.ap.freescale.net (mega.ap.freescale.net [10.192.208.232]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id 21A93402FB; Wed, 26 Jun 2019 15:42:11 +0800 (SGT) From: Anson.Huang@nxp.com To: shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, leonard.crestez@nxp.com, abel.vesa@nxp.com, viresh.kumar@linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Linux-imx@nxp.com Subject: [PATCH 2/2] soc: imx8: Add i.MX8MM UID(unique identifier) support Date: Wed, 26 Jun 2019 15:44:15 +0800 Message-Id: <20190626074415.18224-2-Anson.Huang@nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190626074415.18224-1-Anson.Huang@nxp.com> References: <20190626074415.18224-1-Anson.Huang@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Anson Huang Add i.MX8MM SoC UID(unique identifier) support, user can read it from sysfs: root@imx8mmevk:~# cat /sys/devices/soc0/soc_uid B365FA0A5C85D6EE Signed-off-by: Anson Huang --- drivers/soc/imx/soc-imx8.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/soc/imx/soc-imx8.c b/drivers/soc/imx/soc-imx8.c index c19ef4b..b9831576 100644 --- a/drivers/soc/imx/soc-imx8.c +++ b/drivers/soc/imx/soc-imx8.c @@ -66,6 +66,26 @@ static u32 __init imx8mq_soc_revision(void) return rev; } +static void __init imx8mm_soc_uid(void) +{ + void __iomem *ocotp_base; + struct device_node *np; + + np = of_find_compatible_node(NULL, NULL, "fsl,imx8mm-ocotp"); + if (!np) + return; + + ocotp_base = of_iomap(np, 0); + WARN_ON(!ocotp_base); + + soc_uid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH); + soc_uid <<= 32; + soc_uid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW); + + iounmap(ocotp_base); + of_node_put(np); +} + static u32 __init imx8mm_soc_revision(void) { struct device_node *np; @@ -83,6 +103,9 @@ static u32 __init imx8mm_soc_revision(void) iounmap(anatop_base); of_node_put(np); + + imx8mm_soc_uid(); + return rev; } -- 2.7.4