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=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,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 0A4ECC742A2 for ; Thu, 11 Jul 2019 21:39:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D560E21019 for ; Thu, 11 Jul 2019 21:39:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="z4O/+qkL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729132AbfGKVjX (ORCPT ); Thu, 11 Jul 2019 17:39:23 -0400 Received: from mail-pl1-f195.google.com ([209.85.214.195]:40728 "EHLO mail-pl1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729130AbfGKVjX (ORCPT ); Thu, 11 Jul 2019 17:39:23 -0400 Received: by mail-pl1-f195.google.com with SMTP id a93so3695060pla.7 for ; Thu, 11 Jul 2019 14:39:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=EzNAMttS2AF92NQ3UASWjBRJOhFuJT/fWhFSd6d/ebA=; b=z4O/+qkLA4vXpJ3nNov59+9U3SeoYQEqGfLYay+BW7MFGHoSgA6Xn12KTpwXryLJDa kSdWHgvJHON1OZY/G7R/jEYhWD3YuXocMikT7pFnmEi0y0MAlhVK5Z2cD0FHx35XVxco c3ASNcnkXB5LpHB4QV4MZeb7lTJniA4IELJQjPbMhw+mztJT9Zirbj7YH2N4EvD5Yy5N ZUi3i27poxAiArc1ot2+gaUhMVBBHRVnt/NtXIYIMv+UxzqIkyCydOSueXVgw0FI0OJs L01/sAKO8lTUZTmO3w7KvzYTSEuNbbl4iqXIIApSvkO8BtpiU5jWOwpU6VJQghMhFkqH 8fOg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=EzNAMttS2AF92NQ3UASWjBRJOhFuJT/fWhFSd6d/ebA=; b=Z6y6jTJ3IzoTluaYCeLJoY7DKUQIoACQFUXDDYRghxepPea2WeyB4JwVCccyQ8k6w8 lUFYf5znnHT0lJLRed2YcTy3Z3nzV5RGCGFK7i+V39gjBh3ZrNjd797BfJzCEU89tEfQ ITCpH76fFzeuxL0Jf478GVsKbxmqfEG11jEDS8KfyVVfbxDcPUp2TrebQ/r3GnQp4ZTB 38SunC7jqwXOc9JE8uWn9qfcIhPMgMQixvDnKvSrFiaK/6RXApZmiL/h50X9AiKuPaEb FZqC4zrtngXPSJ37mkr5KtiImBttOfoHKHRQaXkYoJImxaGU5BkAMywIqOymATK50u+9 pFyQ== X-Gm-Message-State: APjAAAWTB0DWKD4scbMhF1WDZrQ/W2fgG4gk1EZZC9dJLUVm5gBBobIT dpUW+5xsqxew+88L02Pirp+xc3d2hsM= X-Google-Smtp-Source: APXvYqzo+CQ+1Gwk9JZOCpnK2gpRq3pumMDay93fwPttE2pGSr0GQaIjmhvL9TZf6VTacDgWLa+rNA== X-Received: by 2002:a17:902:bd94:: with SMTP id q20mr7045643pls.307.1562881162390; Thu, 11 Jul 2019 14:39:22 -0700 (PDT) Received: from localhost.localdomain ([27.7.91.104]) by smtp.gmail.com with ESMTPSA id w3sm5709795pgl.31.2019.07.11.14.39.18 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 11 Jul 2019 14:39:22 -0700 (PDT) From: Vaishali Thakkar To: agross@kernel.org Cc: david.brown@linaro.org, gregkh@linuxfoundation.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, rafael@kernel.org, bjorn.andersson@linaro.org, vkoul@kernel.org, Vaishali Thakkar Subject: [PATCH v5 1/5] base: soc: Add serial_number attribute to soc Date: Fri, 12 Jul 2019 03:09:07 +0530 Message-Id: <20190711213911.23180-2-vaishali.thakkar@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190711213911.23180-1-vaishali.thakkar@linaro.org> References: <20190711213911.23180-1-vaishali.thakkar@linaro.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Bjorn Andersson Add new attribute named "serial_number" as a standard interface for user space to acquire the serial number of the device. For ST-Ericsson SoCs this is exposed by the cryptically named "soc_id" attribute, but this provides a human readable standardized name for this property. Signed-off-by: Bjorn Andersson Signed-off-by: Vaishali Thakkar Reviewed-by: Greg Kroah-Hartman Reviewed-by: Stephen Boyd --- Changes since v4: - Add Stephen's reviewed-by Changes since v3: - Add Greg's Reviewed-by Changes since v2: - None Changes since v1: - Make comment more clear for the case when serial number is not available --- Documentation/ABI/testing/sysfs-devices-soc | 7 +++++++ drivers/base/soc.c | 7 +++++++ include/linux/sys_soc.h | 1 + 3 files changed, 15 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-devices-soc b/Documentation/ABI/testing/sysfs-devices-soc index 6d9cc253f2b2..ba3a3fac0ee1 100644 --- a/Documentation/ABI/testing/sysfs-devices-soc +++ b/Documentation/ABI/testing/sysfs-devices-soc @@ -28,0 +29,7 @@ Description: +What: /sys/devices/socX/serial_number +Date: January 2019 +contact: Bjorn Andersson +Description: + Read-only attribute supported by most SoCs. Contains the SoC's + serial number, if available. + diff --git a/drivers/base/soc.c b/drivers/base/soc.c index 10b280f30217..b0933b9fe67f 100644 --- a/drivers/base/soc.c +++ b/drivers/base/soc.c @@ -35,0 +36 @@ static DEVICE_ATTR(family, S_IRUGO, soc_info_get, NULL); +static DEVICE_ATTR(serial_number, S_IRUGO, soc_info_get, NULL); @@ -59,0 +61,3 @@ static umode_t soc_attribute_mode(struct kobject *kobj, + if ((attr == &dev_attr_serial_number.attr) + && (soc_dev->attr->serial_number != NULL)) + return attr->mode; @@ -79,0 +84,2 @@ static ssize_t soc_info_get(struct device *dev, + if (attr == &dev_attr_serial_number) + return sprintf(buf, "%s\n", soc_dev->attr->serial_number); @@ -89,0 +96 @@ static struct attribute *soc_attr[] = { + &dev_attr_serial_number.attr, diff --git a/include/linux/sys_soc.h b/include/linux/sys_soc.h index b7c70c3e953f..48ceea867dd6 100644 --- a/include/linux/sys_soc.h +++ b/include/linux/sys_soc.h @@ -14,0 +15 @@ struct soc_device_attribute { + const char *serial_number; -- 2.17.1