summaryrefslogtreecommitdiff
path: root/target/linux/ipq806x/patches-4.4/010-6-watchdog-qcom-configure-BARK-time-in-addition-to-BITE-time.patch
blob: bdc3f9989712363195b87e2f6607ed6162382ddc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
From 10073a205df269abcbd9c3fbc690a813827107ef Mon Sep 17 00:00:00 2001
From: Matthew McClintock <mmcclint@codeaurora.org>
Date: Tue, 28 Jun 2016 11:35:21 -0700
Subject: watchdog: qcom: configure BARK time in addition to BITE time

For certain parts and some versions of TZ, TZ will reset the chip
when a BARK is triggered even though it was not configured here. So
by default let's configure this BARK time as well.

Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Thomas Pedersen <twp@codeaurora.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
---
 drivers/watchdog/qcom-wdt.c | 5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/watchdog/qcom-wdt.c
+++ b/drivers/watchdog/qcom-wdt.c
@@ -24,6 +24,7 @@ enum wdt_reg {
 	WDT_RST,
 	WDT_EN,
 	WDT_STS,
+	WDT_BARK_TIME,
 	WDT_BITE_TIME,
 };
 
@@ -31,6 +32,7 @@ static const u32 reg_offset_data_apcs_tm
 	[WDT_RST] = 0x38,
 	[WDT_EN] = 0x40,
 	[WDT_STS] = 0x44,
+	[WDT_BARK_TIME] = 0x4C,
 	[WDT_BITE_TIME] = 0x5C,
 };
 
@@ -38,6 +40,7 @@ static const u32 reg_offset_data_kpss[]
 	[WDT_RST] = 0x4,
 	[WDT_EN] = 0x8,
 	[WDT_STS] = 0xC,
+	[WDT_BARK_TIME] = 0x10,
 	[WDT_BITE_TIME] = 0x14,
 };
 
@@ -66,6 +69,7 @@ static int qcom_wdt_start(struct watchdo
 
 	writel(0, wdt_addr(wdt, WDT_EN));
 	writel(1, wdt_addr(wdt, WDT_RST));
+	writel(wdd->timeout * wdt->rate, wdt_addr(wdt, WDT_BARK_TIME));
 	writel(wdd->timeout * wdt->rate, wdt_addr(wdt, WDT_BITE_TIME));
 	writel(1, wdt_addr(wdt, WDT_EN));
 	return 0;
@@ -108,6 +112,7 @@ static int qcom_wdt_restart(struct watch
 
 	writel(0, wdt_addr(wdt, WDT_EN));
 	writel(1, wdt_addr(wdt, WDT_RST));
+	writel(timeout, wdt_addr(wdt, WDT_BARK_TIME));
 	writel(timeout, wdt_addr(wdt, WDT_BITE_TIME));
 	writel(1, wdt_addr(wdt, WDT_EN));