From: Sascha Hauer <s.hauer@pengutronix.de>
To: Barebox List <barebox@lists.infradead.org>
Subject: [PATCH 1/2] watchdog: i.MX: add soc_reset operation
Date: Thu, 19 Jan 2017 16:03:51 +0100 [thread overview]
Message-ID: <20170119150352.5421-1-s.hauer@pengutronix.de> (raw)
On i.MX21 watchdog type the reset operation is really different
from the watchdog enable/set timeout operation, so create an
extra callback for this instead of folding both things together.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
drivers/watchdog/imxwd.c | 32 +++++++++++++++++++++-----------
1 file changed, 21 insertions(+), 11 deletions(-)
diff --git a/drivers/watchdog/imxwd.c b/drivers/watchdog/imxwd.c
index 03e116ea2..c736fdaa3 100644
--- a/drivers/watchdog/imxwd.c
+++ b/drivers/watchdog/imxwd.c
@@ -26,6 +26,7 @@ struct imx_wd;
struct imx_wd_ops {
int (*set_timeout)(struct imx_wd *, int);
+ void (*soc_reset)(struct imx_wd *);
int (*init)(struct imx_wd *);
};
@@ -76,10 +77,7 @@ static int imx1_watchdog_set_timeout(struct imx_wd *priv, int timeout)
return 0;
}
- if (timeout > 0)
- val = (timeout * 2 - 1) << 8;
- else
- val = 0;
+ val = (timeout * 2 - 1) << 8;
writew(val, priv->base + IMX1_WDOG_WCR);
writew(IMX1_WDOG_WCR_WDE | val, priv->base + IMX1_WDOG_WCR);
@@ -91,6 +89,11 @@ static int imx1_watchdog_set_timeout(struct imx_wd *priv, int timeout)
return 0;
}
+static void imx1_soc_reset(struct imx_wd *priv)
+{
+ writew(IMX1_WDOG_WCR_WDE, priv->base + IMX1_WDOG_WCR);
+}
+
static int imx21_watchdog_set_timeout(struct imx_wd *priv, int timeout)
{
u16 val;
@@ -103,13 +106,9 @@ static int imx21_watchdog_set_timeout(struct imx_wd *priv, int timeout)
if (timeout == 0) /* bit 2 (WDE) cannot be set to 0 again */
return -ENOSYS;
- if (timeout > 0)
- val = ((timeout * 2 - 1) << 8) | IMX21_WDOG_WCR_SRS |
- IMX21_WDOG_WCR_WDA;
- else
- val = 0;
+ val = ((timeout * 2 - 1) << 8) | IMX21_WDOG_WCR_SRS |
+ IMX21_WDOG_WCR_WDA;
- writew(val, priv->base + IMX21_WDOG_WCR);
writew(IMX21_WDOG_WCR_WDE | val, priv->base + IMX21_WDOG_WCR);
/* Write Service Sequence */
@@ -119,6 +118,15 @@ static int imx21_watchdog_set_timeout(struct imx_wd *priv, int timeout)
return 0;
}
+static void imx21_soc_reset(struct imx_wd *priv)
+{
+ u16 val;
+
+ val = IMX21_WDOG_WCR_SRS | IMX21_WDOG_WCR_WDA;
+
+ writew(val, priv->base + IMX21_WDOG_WCR);
+}
+
static int imx_watchdog_set_timeout(struct watchdog *wd, unsigned timeout)
{
struct imx_wd *priv = (struct imx_wd *)to_imx_wd(wd);
@@ -130,7 +138,7 @@ static void __noreturn imxwd_force_soc_reset(struct restart_handler *rst)
{
struct imx_wd *priv = container_of(rst, struct imx_wd, restart);
- priv->ops->set_timeout(priv, -1);
+ priv->ops->soc_reset(priv);
mdelay(1000);
@@ -227,11 +235,13 @@ on_error:
static const struct imx_wd_ops imx21_wd_ops = {
.set_timeout = imx21_watchdog_set_timeout,
+ .soc_reset = imx21_soc_reset,
.init = imx21_wd_init,
};
static const struct imx_wd_ops imx1_wd_ops = {
.set_timeout = imx1_watchdog_set_timeout,
+ .soc_reset = imx1_soc_reset,
};
static __maybe_unused struct of_device_id imx_wdt_dt_ids[] = {
--
2.11.0
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next reply other threads:[~2017-01-19 15:04 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-19 15:03 Sascha Hauer [this message]
2017-01-19 15:03 ` [PATCH 2/2] watchdog: i.MX: Fix internal/external reset Sascha Hauer
2017-01-20 5:39 ` [PATCH 1/2] watchdog: i.MX: add soc_reset operation Sam Ravnborg
2017-01-20 5:44 ` Sam Ravnborg
2017-01-20 8:10 ` Sascha Hauer
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