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Message-Id: <20191203213025.741546037@linuxfoundation.org>
Date: Tue, 3 Dec 2019 23:35:07 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Anson Huang <Anson.Huang@....com>,
Guenter Roeck <linux@...ck-us.net>,
Wim Van Sebroeck <wim@...ux-watchdog.org>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.3 067/135] watchdog: imx_sc_wdt: Pretimeout should follow SCU firmware format
From: Anson Huang <Anson.Huang@....com>
[ Upstream commit 2c50a6b825b3463a7600d6e6acadba73211c3d2c ]
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@....com>
Reviewed-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@...ux-watchdog.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
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 78eaaf75a263f..9545d1e07421a 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;
--
2.20.1
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