From: Li Hua Qian <[email protected]>
TI RTI (Real Time Interrupt) Watchdog doesn't support to record the
watchdog cause. Add a reserved memory to know the last reboot was caused
by the watchdog card. In the reserved memory, some specific info will be
saved to indicate whether the watchdog reset was triggered in last
boot.
Signed-off-by: Li Hua Qian <[email protected]>
---
.../devicetree/bindings/watchdog/ti,rti-wdt.yaml | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/Documentation/devicetree/bindings/watchdog/ti,rti-wdt.yaml b/Documentation/devicetree/bindings/watchdog/ti,rti-wdt.yaml
index fc553211e42d..8c16fd3929ec 100644
--- a/Documentation/devicetree/bindings/watchdog/ti,rti-wdt.yaml
+++ b/Documentation/devicetree/bindings/watchdog/ti,rti-wdt.yaml
@@ -34,6 +34,18 @@ properties:
power-domains:
maxItems: 1
+ memory-region:
+ maxItems: 1
+ description:
+ Contains the watchdog reserved memory. It is optional.
+ In the reserved memory, the specified values, which are
+ PON_REASON_SOF_NUM(0xBBBBCCCC), PON_REASON_MAGIC_NUM(0xDDDDDDDD),
+ and PON_REASON_EOF_NUM(0xCCCCBBBB), are pre-stored at the first
+ 3 * 4 bytes to tell that last boot was caused by watchdog reset.
+ Once the PON reason is captured by driver(rti_wdt.c), the driver
+ is supposed to wipe the whole memory region.
+
+
required:
- compatible
- reg
--
2.34.1
On 13/07/2023 11:51, [email protected] wrote:
> From: Li Hua Qian <[email protected]>
>
> TI RTI (Real Time Interrupt) Watchdog doesn't support to record the
> watchdog cause. Add a reserved memory to know the last reboot was caused
> by the watchdog card. In the reserved memory, some specific info will be
> saved to indicate whether the watchdog reset was triggered in last
> boot.
>
> Signed-off-by: Li Hua Qian <[email protected]>
> ---
> .../devicetree/bindings/watchdog/ti,rti-wdt.yaml | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/watchdog/ti,rti-wdt.yaml b/Documentation/devicetree/bindings/watchdog/ti,rti-wdt.yaml
> index fc553211e42d..8c16fd3929ec 100644
> --- a/Documentation/devicetree/bindings/watchdog/ti,rti-wdt.yaml
> +++ b/Documentation/devicetree/bindings/watchdog/ti,rti-wdt.yaml
> @@ -34,6 +34,18 @@ properties:
> power-domains:
> maxItems: 1
>
> + memory-region:
> + maxItems: 1
> + description:
> + Contains the watchdog reserved memory. It is optional.
> + In the reserved memory, the specified values, which are
> + PON_REASON_SOF_NUM(0xBBBBCCCC), PON_REASON_MAGIC_NUM(0xDDDDDDDD),
> + and PON_REASON_EOF_NUM(0xCCCCBBBB), are pre-stored at the first
> + 3 * 4 bytes to tell that last boot was caused by watchdog reset.
> + Once the PON reason is captured by driver(rti_wdt.c), the driver
> + is supposed to wipe the whole memory region.
> +
> +
If there is going to be new version, only one blank line, not two.
In any case:
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Best regards,
Krzysztof