From patchwork Wed Jul 3 09:50:34 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Josh Wu X-Patchwork-Id: 256582 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:770:15f::2]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 4F2902C00A9 for ; Wed, 3 Jul 2013 20:12:50 +1000 (EST) Received: from merlin.infradead.org ([205.233.59.134]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UuJvD-0003nO-AS; Wed, 03 Jul 2013 10:04:25 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UuJog-0006WX-Ug; Wed, 03 Jul 2013 09:57:38 +0000 Received: from nasmtp01.atmel.com ([192.199.1.245] helo=DVREDG01.corp.atmel.com) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UuJof-0006Vr-Or; Wed, 03 Jul 2013 09:57:38 +0000 Received: from apsmtp01.atmel.com (10.168.254.31) by DVREDG01.corp.atmel.com (10.42.103.30) with Microsoft SMTP Server (TLS) id 14.2.342.3; Wed, 3 Jul 2013 03:57:11 -0600 Received: from shaarm01.corp.atmel.com (10.168.254.13) by apsmtp01.atmel.com (10.168.254.31) with Microsoft SMTP Server id 14.2.342.3; Wed, 3 Jul 2013 17:58:49 +0800 From: Josh Wu To: , , Subject: [PATCH 6/6] mtd: ofpart: add compatible check for child nodes Date: Wed, 3 Jul 2013 17:50:34 +0800 Message-ID: <1372845034-5579-7-git-send-email-josh.wu@atmel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1372845034-5579-1-git-send-email-josh.wu@atmel.com> References: <1372845034-5579-1-git-send-email-josh.wu@atmel.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130703_055737_977492_5B9D5E8D X-CRM114-Status: GOOD ( 14.73 ) 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 SPF_PASS SPF: sender matches SPF record -0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Josh Wu , computersforpeace@gmail.com, plagnioj@jcrosoft.com, sergei.shtylyov@cogentembedded.com X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org In case that the nand device will support some features like Nand Flash Controller, we want to make the sub feature as a sub node of nand device. Use such organization it is easy to enable/disable feature, also it is back compatible and more readable. If the sub-node has a compatible property then it is a driver not partition. Signed-off-by: Josh Wu Acked-by: Brian Norris Acked-by: Jean-Christophe PLAGNIOL-VILLARD --- v3 --> v4: - remove the 'len' parameter, just use NULL. - refine the commit message. - also add a NOTE in devicetree/bindings/mtd/partition.txt. .../devicetree/bindings/mtd/partition.txt | 1 + drivers/mtd/ofpart.c | 13 ++++++++++++- 2 files changed, 13 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/mtd/partition.txt b/Documentation/devicetree/bindings/mtd/partition.txt index 9315ac9..8e5557d 100644 --- a/Documentation/devicetree/bindings/mtd/partition.txt +++ b/Documentation/devicetree/bindings/mtd/partition.txt @@ -4,6 +4,7 @@ Partitions can be represented by sub-nodes of an mtd device. This can be used on platforms which have strong conventions about which portions of a flash are used for what purposes, but which don't use an on-flash partition table such as RedBoot. +NOTE: if the sub-node has a compatible string, then it is not a partition. #address-cells & #size-cells must both be present in the mtd device. There are two valid values for both: diff --git a/drivers/mtd/ofpart.c b/drivers/mtd/ofpart.c index 553d6d6..30fcea1 100644 --- a/drivers/mtd/ofpart.c +++ b/drivers/mtd/ofpart.c @@ -20,6 +20,10 @@ #include #include +static bool node_has_compatible(struct device_node *pp) +{ + return of_get_property(pp, "compatible", NULL); +} static int parse_ofpart_partitions(struct mtd_info *master, struct mtd_partition **pparts, struct mtd_part_parser_data *data) @@ -40,8 +44,12 @@ static int parse_ofpart_partitions(struct mtd_info *master, /* First count the subnodes */ pp = NULL; nr_parts = 0; - while ((pp = of_get_next_child(node, pp))) + while ((pp = of_get_next_child(node, pp))) { + if (node_has_compatible(pp)) + continue; + nr_parts++; + } if (nr_parts == 0) return 0; @@ -57,6 +65,9 @@ static int parse_ofpart_partitions(struct mtd_info *master, int len; int a_cells, s_cells; + if (node_has_compatible(pp)) + continue; + reg = of_get_property(pp, "reg", &len); if (!reg) { nr_parts--;