Re: [PATCH v2 6/8] ARM: dts: exynos: Fix infinite interrupt in soft mode on Exynos4210 and Exynos5440

From: Guenter Roeck
Date: Sun Mar 12 2017 - 16:50:56 EST


On 03/11/2017 09:25 AM, Krzysztof Kozlowski wrote:
In soft (no-reboot) mode, the driver self-pings watchdog upon expiration
of an interrupt. The interrupt has to be cleared, because otherwise
system enters infinite interrupt handling loop.

Use a samsung,s3c6410-wdt compatible to select appropriate quirk for
clearing the watchdog interrupt.

Signed-off-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>

Acked-by: Guenter Roeck <linux@xxxxxxxxxxxx>

---
arch/arm/boot/dts/exynos4210.dtsi | 2 +-
arch/arm/boot/dts/exynos5440.dtsi | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/exynos4210.dtsi b/arch/arm/boot/dts/exynos4210.dtsi
index 9d51d4d62d94..e6e62103a71f 100644
--- a/arch/arm/boot/dts/exynos4210.dtsi
+++ b/arch/arm/boot/dts/exynos4210.dtsi
@@ -120,7 +120,7 @@
};

watchdog: watchdog@10060000 {
- compatible = "samsung,s3c2410-wdt";
+ compatible = "samsung,s3c6410-wdt";
reg = <0x10060000 0x100>;
interrupts = <GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clock CLK_WDT>;
diff --git a/arch/arm/boot/dts/exynos5440.dtsi b/arch/arm/boot/dts/exynos5440.dtsi
index 77d35bb92950..abfe054b2187 100644
--- a/arch/arm/boot/dts/exynos5440.dtsi
+++ b/arch/arm/boot/dts/exynos5440.dtsi
@@ -189,7 +189,7 @@
};

watchdog@110000 {
- compatible = "samsung,s3c2410-wdt";
+ compatible = "samsung,s3c6410-wdt";
reg = <0x110000 0x1000>;
interrupts = <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clock CLK_B_125>;