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From: Juergen Beisert <jbe@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 4/4] ARM/MXS: add reset cause detection
Date: Thu, 12 Jul 2012 15:47:15 +0200	[thread overview]
Message-ID: <1342100835-9870-5-git-send-email-jbe@pengutronix.de> (raw)
In-Reply-To: <1342100835-9870-1-git-send-email-jbe@pengutronix.de>

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
---
 drivers/watchdog/im28wd.c |   25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/watchdog/im28wd.c b/drivers/watchdog/im28wd.c
index b016910..c465f87 100644
--- a/drivers/watchdog/im28wd.c
+++ b/drivers/watchdog/im28wd.c
@@ -21,6 +21,7 @@
 #include <errno.h>
 #include <malloc.h>
 #include <watchdog.h>
+#include <reset_source.h>
 
 #define MXS_RTC_CTRL 0x0
 #define MXS_RTC_SET_ADDR 0x4
@@ -73,6 +74,27 @@ static int imx28_watchdog_set_timeout(struct watchdog *wd, unsigned timeout)
 	return 0;
 }
 
+static void __maybe_unused imx28_detect_reset_source(const struct imx28_wd *p)
+{
+	u32 reg;
+
+	reg = readl(p->regs + MXS_RTC_PERSISTENT0);
+	if (reg & MXS_RTC_PERSISTENT0_EXT_RST) {
+		writel(MXS_RTC_PERSISTENT0_EXT_RST,
+			p->regs + MXS_RTC_PERSISTENT0 + MXS_RTC_CLR_ADDR);
+		set_reset_source(RESET_POR);
+		return;
+	}
+	if (reg & MXS_RTC_PERSISTENT0_THM_RST) {
+		writel(MXS_RTC_PERSISTENT0_THM_RST,
+			p->regs + MXS_RTC_PERSISTENT0 + MXS_RTC_CLR_ADDR);
+		set_reset_source(RESET_RST);
+		return;
+	}
+
+	set_reset_source(RESET_RST);
+}
+
 static int imx28_wd_probe(struct device_d *dev)
 {
 	struct imx28_wd *priv;
@@ -94,6 +116,9 @@ static int imx28_wd_probe(struct device_d *dev)
 	if (rc != 0)
 		goto on_error;
 
+#ifdef CONFIG_GLOBALVAR
+	imx28_detect_reset_source(priv);
+#endif
 	dev->priv = priv;
 	return 0;
 
-- 
1.7.10.4


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  parent reply	other threads:[~2012-07-12 13:47 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-12 13:47 [PATCHv3] Enable a way to provide the reason for "being here" Juergen Beisert
2012-07-12 13:47 ` [PATCH 1/4] " Juergen Beisert
2012-07-12 13:47 ` [PATCH 2/4] ARM/Samsung: add support to detect the reset source Juergen Beisert
2012-07-12 13:47 ` [PATCH 3/4] ARM/i.MX: " Juergen Beisert
2012-07-12 13:47 ` Juergen Beisert [this message]
2012-07-12 19:56   ` [PATCH 4/4] ARM/MXS: add reset cause detection Marc Kleine-Budde
2012-07-13  5:31     ` Juergen Beisert
2012-07-13  6:04 [PATCHv4] Enable a way to provide the reason for "being here" Juergen Beisert
2012-07-13  6:04 ` [PATCH 4/4] ARM/MXS: add reset cause detection Juergen Beisert
2012-07-18  8:46 [PATCHv5] Enable a way to provide the reason for "being here" Juergen Beisert
2012-07-18  8:46 ` [PATCH 4/4] ARM/MXS: add reset cause detection Juergen Beisert

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