From patchwork Wed Apr 25 19:06:07 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Dunn X-Patchwork-Id: 155060 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 84172B6FA3 for ; Thu, 26 Apr 2012 05:07:27 +1000 (EST) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1SN7Xq-0004HM-HR; Wed, 25 Apr 2012 19:06:30 +0000 Received: from smtp.newsguy.com ([74.209.136.69]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1SN7Xo-0004Gz-MK for linux-mtd@lists.infradead.org; Wed, 25 Apr 2012 19:06:29 +0000 Received: from localhost.localdomain (22.sub-166-250-1.myvzw.com [166.250.1.22]) by smtp.newsguy.com (8.14.3/8.14.3) with ESMTP id q3PJ6FAY016192 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 25 Apr 2012 12:06:27 -0700 (PDT) (envelope-from mikedunn@newsguy.com) From: Mike Dunn To: linux-mtd@lists.infradead.org Subject: [PATCH v2 3/7] mtd: expose ecc_strength through sysfs Date: Wed, 25 Apr 2012 12:06:07 -0700 Message-Id: <1335380771-27805-4-git-send-email-mikedunn@newsguy.com> X-Mailer: git-send-email 1.7.3.4 In-Reply-To: <1335380771-27805-1-git-send-email-mikedunn@newsguy.com> References: <1335380771-27805-1-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: 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 ecc_strength element of struct mtd_info is exposed as a read-only variable in sysfs. Signed-off-by: Mike Dunn --- This v2 is actually unchanged from the original set. Documentation/ABI/testing/sysfs-class-mtd | 12 ++++++++++++ drivers/mtd/mtdcore.c | 10 ++++++++++ 2 files changed, 22 insertions(+), 0 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-class-mtd b/Documentation/ABI/testing/sysfs-class-mtd index 4d55a18..43d1818 100644 --- a/Documentation/ABI/testing/sysfs-class-mtd +++ b/Documentation/ABI/testing/sysfs-class-mtd @@ -123,3 +123,15 @@ 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: April 2012 +KernelVersion: 3.4 +Contact: linux-mtd@lists.infradead.org +Description: + Maximum number of bit errors that the device is capable of + correcting within each region covering an ecc step. This will + always be a non-negative integer. Note that some devices will + have multiple ecc steps within each writesize region. + + 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 c837507..090e849 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, };