From patchwork Thu Mar 15 17:25:51 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Dunn X-Patchwork-Id: 147047 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from merlin.infradead.org (merlin.infradead.org [IPv6:2001:4978:20e::2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id C0907B6F6E for ; Fri, 16 Mar 2012 04:28:07 +1100 (EST) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1S8ERc-0003rT-RH; Thu, 15 Mar 2012 17:26:32 +0000 Received: from smtp.newsguy.com ([74.209.136.69]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1S8ERY-0003qq-QH for linux-mtd@lists.infradead.org; Thu, 15 Mar 2012 17:26:30 +0000 Received: from localhost.localdomain (3.sub-166-250-17.myvzw.com [166.250.17.3]) by smtp.newsguy.com (8.14.3/8.14.3) with ESMTP id q2FHQEuY089297 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 15 Mar 2012 10:26:23 -0700 (PDT) (envelope-from mikedunn@newsguy.com) From: Mike Dunn To: linux-mtd@lists.infradead.org Subject: [PATCH 1/3] MTD: expose ecc_strength through sysfs Date: Thu, 15 Mar 2012 10:25:51 -0700 Message-Id: <1331832353-15569-2-git-send-email-mikedunn@newsguy.com> X-Mailer: git-send-email 1.7.3.4 In-Reply-To: <1331832353-15569-1-git-send-email-mikedunn@newsguy.com> References: <1331832353-15569-1-git-send-email-mikedunn@newsguy.com> X-Spam-Note: CRM114 invocation failed X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-1.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Ricard Wanderlof , Mike Dunn X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-mtd-bounces@lists.infradead.org Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org This patch exposes the struct mtd_info element ecc_strength as a read-only variable through sysfs. Signed-off-by: Mike Dunn --- Documentation/ABI/testing/sysfs-class-mtd | 11 +++++++++++ drivers/mtd/mtdcore.c | 10 ++++++++++ 2 files changed, 21 insertions(+), 0 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-class-mtd b/Documentation/ABI/testing/sysfs-class-mtd index 4d55a18..6a218e6 100644 --- a/Documentation/ABI/testing/sysfs-class-mtd +++ b/Documentation/ABI/testing/sysfs-class-mtd @@ -123,3 +123,14 @@ Description: half page, or a quarter page). In the case of ECC NOR, it is the ECC block size. + +What: /sys/class/mtd/mtdX/ecc_strength +Date: March 2012 +KernelVersion: 3.3.1 +Contact: linux-mtd@lists.infradead.org +Description: + Maximum number of bit errors that the device is capable of + correcting when reading a region of size writesize. This will + always be a non-negative integer. + + In the case of devices lacking any ECC capability, it is 0. diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index b274fdf..1573644 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -250,6 +250,15 @@ static ssize_t mtd_name_show(struct device *dev, } static DEVICE_ATTR(name, S_IRUGO, mtd_name_show, NULL); +static ssize_t mtd_ecc_strength_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct mtd_info *mtd = dev_get_drvdata(dev); + + return snprintf(buf, PAGE_SIZE, "%u\n", mtd->ecc_strength); +} +static DEVICE_ATTR(ecc_strength, S_IRUGO, mtd_ecc_strength_show, NULL); + static struct attribute *mtd_attrs[] = { &dev_attr_type.attr, &dev_attr_flags.attr, @@ -260,6 +269,7 @@ static struct attribute *mtd_attrs[] = { &dev_attr_oobsize.attr, &dev_attr_numeraseregions.attr, &dev_attr_name.attr, + &dev_attr_ecc_strength.attr, NULL, };