From patchwork Thu Feb 21 16:24:15 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vaishali Thakkar X-Patchwork-Id: 10824345 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2A9DC14E1 for ; Thu, 21 Feb 2019 16:24:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D73DF310D1 for ; Thu, 21 Feb 2019 16:24:34 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CAB16319A2; Thu, 21 Feb 2019 16:24:34 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5B45031991 for ; Thu, 21 Feb 2019 16:24:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728302AbfBUQYd (ORCPT ); Thu, 21 Feb 2019 11:24:33 -0500 Received: from mail-pf1-f194.google.com ([209.85.210.194]:41758 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726443AbfBUQYd (ORCPT ); Thu, 21 Feb 2019 11:24:33 -0500 Received: by mail-pf1-f194.google.com with SMTP id d25so5707645pfn.8 for ; Thu, 21 Feb 2019 08:24:33 -0800 (PST) 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=LvnoAwQGH8etogCUYhRrGiQaID48sL8JQws8t+HfGzc=; b=jGEHK7PFla1CoPyN0b8i2CJRpufefgn50DRIdvwRAN0Jd0uA78SbHiRwvcjVn6fS71 sgq1punYBKXOsZEKncBsUfLks/Aazj/5jLsAuUhB+VP88l7B1wwUHED0ES33JBUVG+mT Uz2xr1HBn+/mSbDIvH72SFGvx10gibTQs0KaXJngMXAK+9IS3YAKoUFT9pCl2aiDsRwL LSLJLwj30LpqCne4YxDGWoPnELyNX271dA64ket0F2dK/G4VslTfRmYAbQycL7hx3HgK 7jxowx8GcbDBbS+8M43gGLuMVPxF2d/RQW+j4ht5dDj7RWgY7h2mUE3OFBsEDvRiANqq PSLA== 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=LvnoAwQGH8etogCUYhRrGiQaID48sL8JQws8t+HfGzc=; b=rJRuGRdp0OaNZOG3rrahFgvbXfPMvwCoWqcO4T6mL0+/ERIh1mtOJNM8+4Nd2eAVTG UYw40MTHclgBif0TEobLrxYTfmc0dX4lou119Fus6HQzMMn0B/Z4JQekZK/mKKOSmvhe M+MHyHMECDZzIehJkNFNgMTB/wPrLj8KOTCA4GiXHOh4X4eyeGgLgMbThvrXOexVziWr 2i65nAAKUVQjgfhef9iD/eSfiY7k5wcsZ6fZNSVN0WKq9t2lnIBDRnX3ISXAzgmUGyak ceiPtsDf0jA3OzBoxltGBoazJqmbIn5b+/CyET1dftfL3f0XFfxv2WtI+vl51UJtfFE2 vEgQ== X-Gm-Message-State: AHQUAuYeyGd0HsZHImy3J12zXAb9q1sxBBMpnjShRFxF7maIf3sMtED5 gm1uZ5YBUzsV4xTs7jFZOi5SeA== X-Google-Smtp-Source: AHgI3IYzZ276eHlxhpZAEAvQAmyBw2DNh/fkKrIrwvoOHcfANKQPKfr7tBsyyiOa7YVmU93iqss13g== X-Received: by 2002:a65:6684:: with SMTP id b4mr35485119pgw.55.1550766272737; Thu, 21 Feb 2019 08:24:32 -0800 (PST) Received: from localhost.localdomain ([116.75.87.120]) by smtp.gmail.com with ESMTPSA id 20sm21382910pfs.182.2019.02.21.08.24.28 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 21 Feb 2019 08:24:32 -0800 (PST) From: Vaishali Thakkar To: andy.gross@linaro.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 v3 1/5] base: soc: Add serial_number attribute to soc Date: Thu, 21 Feb 2019 21:54:15 +0530 Message-Id: <20190221162419.32384-2-vaishali.thakkar@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190221162419.32384-1-vaishali.thakkar@linaro.org> References: <20190221162419.32384-1-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 X-Virus-Scanned: ClamAV using ClamSMTP 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 --- 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 @@ -26,6 +26,13 @@ Description: Read-only attribute common to all SoCs. Contains SoC family name (e.g. DB8500). +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. + What: /sys/devices/socX/soc_id Date: January 2012 contact: Lee Jones 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 @@ -33,6 +33,7 @@ static struct bus_type soc_bus_type = { static DEVICE_ATTR(machine, S_IRUGO, soc_info_get, NULL); static DEVICE_ATTR(family, S_IRUGO, soc_info_get, NULL); +static DEVICE_ATTR(serial_number, S_IRUGO, soc_info_get, NULL); static DEVICE_ATTR(soc_id, S_IRUGO, soc_info_get, NULL); static DEVICE_ATTR(revision, S_IRUGO, soc_info_get, NULL); @@ -57,6 +58,9 @@ static umode_t soc_attribute_mode(struct kobject *kobj, if ((attr == &dev_attr_revision.attr) && (soc_dev->attr->revision != NULL)) return attr->mode; + if ((attr == &dev_attr_serial_number.attr) + && (soc_dev->attr->serial_number != NULL)) + return attr->mode; if ((attr == &dev_attr_soc_id.attr) && (soc_dev->attr->soc_id != NULL)) return attr->mode; @@ -77,6 +81,8 @@ static ssize_t soc_info_get(struct device *dev, return sprintf(buf, "%s\n", soc_dev->attr->family); if (attr == &dev_attr_revision) return sprintf(buf, "%s\n", soc_dev->attr->revision); + if (attr == &dev_attr_serial_number) + return sprintf(buf, "%s\n", soc_dev->attr->serial_number); if (attr == &dev_attr_soc_id) return sprintf(buf, "%s\n", soc_dev->attr->soc_id); @@ -87,6 +93,7 @@ static ssize_t soc_info_get(struct device *dev, static struct attribute *soc_attr[] = { &dev_attr_machine.attr, &dev_attr_family.attr, + &dev_attr_serial_number.attr, &dev_attr_soc_id.attr, &dev_attr_revision.attr, NULL, diff --git a/include/linux/sys_soc.h b/include/linux/sys_soc.h index bed223b70217..2a13bc033bd6 100644 --- a/include/linux/sys_soc.h +++ b/include/linux/sys_soc.h @@ -12,6 +12,7 @@ struct soc_device_attribute { const char *machine; const char *family; const char *revision; + const char *serial_number; const char *soc_id; const void *data; };