From: Anson Huang <Anson.Huang@nxp.com>
To: wim@linux-watchdog.org, linux@roeck-us.net, shawnguo@kernel.org,
s.hauer@pengutronix.de, kernel@pengutronix.de,
festevam@gmail.com, linux-watchdog@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Cc: Linux-imx@nxp.com
Subject: [PATCH] watchdog: imx_sc_wdt: Pretimeout should follow SCU firmware format
Date: Wed, 9 Oct 2019 15:37:47 +0800 [thread overview]
Message-ID: <1570606667-16729-1-git-send-email-Anson.Huang@nxp.com> (raw)
SCU firmware calculates pretimeout based on current time stamp
instead of watchdog timeout stamp, need to convert the pretimeout
to SCU firmware's timeout value.
Fixes: 15f7d7fc5542 ("watchdog: imx_sc: Add pretimeout support")
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
drivers/watchdog/imx_sc_wdt.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/watchdog/imx_sc_wdt.c b/drivers/watchdog/imx_sc_wdt.c
index 7ea5cf5..8ed89f0 100644
--- a/drivers/watchdog/imx_sc_wdt.c
+++ b/drivers/watchdog/imx_sc_wdt.c
@@ -99,8 +99,14 @@ static int imx_sc_wdt_set_pretimeout(struct watchdog_device *wdog,
{
struct arm_smccc_res res;
+ /*
+ * SCU firmware calculates pretimeout based on current time
+ * stamp instead of watchdog timeout stamp, need to convert
+ * the pretimeout to SCU firmware's timeout value.
+ */
arm_smccc_smc(IMX_SIP_TIMER, IMX_SIP_TIMER_SET_PRETIME_WDOG,
- pretimeout * 1000, 0, 0, 0, 0, 0, &res);
+ (wdog->timeout - pretimeout) * 1000, 0, 0, 0,
+ 0, 0, &res);
if (res.a0)
return -EACCES;
--
2.7.4
next reply other threads:[~2019-10-09 7:40 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-09 7:37 Anson Huang [this message]
2019-10-09 13:42 ` Guenter Roeck
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