From patchwork Tue Sep 25 10:25:03 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabio Porcedda X-Patchwork-Id: 1503551 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork2.kernel.org (Postfix) with ESMTP id 2C53ADF28C for ; Tue, 25 Sep 2012 10:27:20 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TGSKf-0001zW-Me; Tue, 25 Sep 2012 10:25:37 +0000 Received: from mail-ey0-f177.google.com ([209.85.215.177]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TGSKH-0001xN-99 for linux-arm-kernel@lists.infradead.org; Tue, 25 Sep 2012 10:25:15 +0000 Received: by eaah13 with SMTP id h13so699708eaa.36 for ; Tue, 25 Sep 2012 03:25:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; bh=WYup2L6Tt5hoLUsXhOBV3vRuRMb/w3uHRx49Z+3eOP8=; b=ETSasyopF6VZsaAUvNgZaMgY/I1AKwQAk8gFIFJ+/YhpvLGlJvSe6UOhgAdhb/s3T6 3wb2HCK8t1Wt6/Vm1/OXZv1h5PTKejV3ghvCC8dMb7tmAvv/f2Ckb8LiO/uhVz1tKfcl lMCmj2HI99pT+627PrslGBV09FZNNNCr4VEp7V9gpthkQaN0GXJZ5zc7QnFcU46343Gu FbcPbbct92Np8hI7zNL3aHXqfKcqmQ9xWAgFPBlxZI+v+qvK3r9a/I/Syt57M3PGPXDZ qmGWNzb9q2hU9yj2s6v4HpP70f1vSknhk2fY/z0kRwlftS5O+5X06N9IpKL8hyFJ8/gu NZVQ== Received: by 10.14.178.6 with SMTP id e6mr18371110eem.36.1348568711185; Tue, 25 Sep 2012 03:25:11 -0700 (PDT) Received: from ld2036.tmt.telital.com ([213.205.6.118]) by mx.google.com with ESMTPS id 25sm12198922bkx.9.2012.09.25.03.25.08 (version=SSLv3 cipher=OTHER); Tue, 25 Sep 2012 03:25:09 -0700 (PDT) From: Fabio Porcedda To: Wim Van Sebroeck , linux-watchdog@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Nicolas Ferre , Jean-Christophe PLAGNIOL-VILLARD , Andrew Victor Subject: [PATCH v4 1/2] watchdog: at91sam9_wdt: add device tree support Date: Tue, 25 Sep 2012 12:25:03 +0200 Message-Id: <1348568704-28304-2-git-send-email-fabio.porcedda@gmail.com> X-Mailer: git-send-email 1.7.11.3 In-Reply-To: <1348568704-28304-1-git-send-email-fabio.porcedda@gmail.com> References: <1348568704-28304-1-git-send-email-fabio.porcedda@gmail.com> X-Spam-Note: CRM114 invocation failed X-Spam-Score: -2.7 (--) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-2.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [209.85.215.177 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (fabio.porcedda[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature Cc: devicetree-discuss@lists.ozlabs.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Tested on an at91sam9260 board (evk-pro3) Signed-off-by: Fabio Porcedda --- .../devicetree/bindings/watchdog/atmel-wdt.txt | 19 +++++++++++++++++++ drivers/watchdog/at91sam9_wdt.c | 21 +++++++++++++++++++++ 2 files changed, 40 insertions(+) create mode 100644 Documentation/devicetree/bindings/watchdog/atmel-wdt.txt diff --git a/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt b/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt new file mode 100644 index 0000000..5947929 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt @@ -0,0 +1,19 @@ +* Atmel Watchdog Timers + +** at91sam9-wdt + +Required properties: +- compatible: must be "atmel,at91sam9260-wdt". +- reg: physical base address of the controller and length of memory mapped + region. + +Optional properties: +- heartbeat: contains the watchdog heartbeats in seconds. + +Example: + + watchdog@fffffd40 { + compatible = "atmel,at91sam9260-wdt"; + reg = <0xfffffd40 0x10>; + heartbeat = <10>; + }; diff --git a/drivers/watchdog/at91sam9_wdt.c b/drivers/watchdog/at91sam9_wdt.c index 05e1be8..84658d7 100644 --- a/drivers/watchdog/at91sam9_wdt.c +++ b/drivers/watchdog/at91sam9_wdt.c @@ -32,6 +32,7 @@ #include #include #include +#include #include "at91sam9_wdt.h" @@ -254,6 +255,14 @@ static struct miscdevice at91wdt_miscdev = { .fops = &at91wdt_fops, }; +static inline void __init at91wdt_probe_dt(struct device_node *node) +{ + if (!node) + return; + + of_property_read_u32(node, "heartbeat", &heartbeat); +} + static int __init at91wdt_probe(struct platform_device *pdev) { struct resource *r; @@ -272,6 +281,8 @@ static int __init at91wdt_probe(struct platform_device *pdev) return -ENOMEM; } + at91wdt_probe_dt(pdev->dev.of_node); + /* Set watchdog */ res = at91_wdt_settimeout(ms_to_ticks(WDT_HW_TIMEOUT * 1000)); if (res) @@ -302,11 +313,21 @@ static int __exit at91wdt_remove(struct platform_device *pdev) return res; } +#if defined(CONFIG_OF) +static const struct of_device_id at91_wdt_dt_ids[] = { + { .compatible = "atmel,at91sam9260-wdt" }, + { /* sentinel */ } +}; + +MODULE_DEVICE_TABLE(of, at91_wdt_dt_ids); +#endif + static struct platform_driver at91wdt_driver = { .remove = __exit_p(at91wdt_remove), .driver = { .name = "at91_wdt", .owner = THIS_MODULE, + .of_match_table = of_match_ptr(at91_wdt_dt_ids), }, };