Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753297AbbDASJc (ORCPT ); Wed, 1 Apr 2015 14:09:32 -0400 Received: from mail-qg0-f74.google.com ([209.85.192.74]:32803 "EHLO mail-qg0-f74.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752758AbbDASJb (ORCPT ); Wed, 1 Apr 2015 14:09:31 -0400 X-Greylist: delayed 1175 seconds by postgrey-1.27 at vger.kernel.org; Wed, 01 Apr 2015 14:09:31 EDT From: Andrew Bresticker To: Wim Van Sebroeck , Guenter Roeck Cc: linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org, Andrew Bresticker , Ezequiel Garcia , James Hogan Subject: [PATCH V2 3/3] watchdog: imgpdc: Add reboot support Date: Wed, 1 Apr 2015 10:43:16 -0700 Message-Id: <1427910196-28568-3-git-send-email-abrestic@chromium.org> X-Mailer: git-send-email 2.2.0.rc0.207.ga3a616c In-Reply-To: <1427910196-28568-1-git-send-email-abrestic@chromium.org> References: <1427910196-28568-1-git-send-email-abrestic@chromium.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2168 Lines: 74 Register a restart handler that will restart the system by writing to the watchdog's SOFT_RESET register. Signed-off-by: Andrew Bresticker Reviewed-by: Guenter Roeck Cc: Ezequiel Garcia Cc: James Hogan --- No changes from v1. --- drivers/watchdog/imgpdc_wdt.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/watchdog/imgpdc_wdt.c b/drivers/watchdog/imgpdc_wdt.c index c58b085..99e5ba4 100644 --- a/drivers/watchdog/imgpdc_wdt.c +++ b/drivers/watchdog/imgpdc_wdt.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include @@ -57,6 +58,7 @@ struct pdc_wdt_dev { struct clk *wdt_clk; struct clk *sys_clk; void __iomem *base; + struct notifier_block restart_handler; }; static int pdc_wdt_keepalive(struct watchdog_device *wdt_dev) @@ -136,6 +138,18 @@ static const struct watchdog_ops pdc_wdt_ops = { .set_timeout = pdc_wdt_set_timeout, }; +static int pdc_wdt_restart(struct notifier_block *this, unsigned long mode, + void *cmd) +{ + struct pdc_wdt_dev *wdt = container_of(this, struct pdc_wdt_dev, + restart_handler); + + /* Assert SOFT_RESET */ + writel(0x1, wdt->base + PDC_WDT_SOFT_RESET); + + return NOTIFY_OK; +} + static int pdc_wdt_probe(struct platform_device *pdev) { int ret, val; @@ -246,6 +260,13 @@ static int pdc_wdt_probe(struct platform_device *pdev) if (ret) goto disable_wdt_clk; + pdc_wdt->restart_handler.notifier_call = pdc_wdt_restart; + pdc_wdt->restart_handler.priority = 128; + ret = register_restart_handler(&pdc_wdt->restart_handler); + if (ret) + dev_warn(&pdev->dev, "failed to register restart handler: %d\n", + ret); + return 0; disable_wdt_clk: -- 2.2.0.rc0.207.ga3a616c -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/