diff mbox series

[v1] drivers: watchdog: ast2600 support bootstatus

Message ID 20240314065744.1182701-1-peteryin.openbmc@gmail.com (mailing list archive)
State New
Headers show
Series [v1] drivers: watchdog: ast2600 support bootstatus | expand

Commit Message

Peter Yin March 14, 2024, 6:57 a.m. UTC
Add WDIOF_EXTERN1 bootstatus in ast2600

Signed-off-by: Peter Yin <peteryin.openbmc@gmail.com>
---
Change log:

v1
  - Patch 0001 - Add WDIOF_EXTERN1 bootstatus
---
 drivers/watchdog/aspeed_wdt.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

Comments

Guenter Roeck March 14, 2024, 1:50 p.m. UTC | #1
On 3/13/24 23:57, Peter Yin wrote:
> Add WDIOF_EXTERN1 bootstatus in ast2600
> 

This does a bit more than that because it replaces
WDIOF_CARDRESET with WDIOF_EXTERN1 for ast2600.

> Signed-off-by: Peter Yin <peteryin.openbmc@gmail.com>
> ---
> Change log:
> 
> v1
>    - Patch 0001 - Add WDIOF_EXTERN1 bootstatus
> ---
>   drivers/watchdog/aspeed_wdt.c | 14 ++++++++++++--
>   1 file changed, 12 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/watchdog/aspeed_wdt.c b/drivers/watchdog/aspeed_wdt.c
> index b4773a6aaf8c..8adadd394be6 100644
> --- a/drivers/watchdog/aspeed_wdt.c
> +++ b/drivers/watchdog/aspeed_wdt.c
> @@ -81,6 +81,7 @@ MODULE_DEVICE_TABLE(of, aspeed_wdt_of_table);
>   #define   WDT_CLEAR_TIMEOUT_AND_BOOT_CODE_SELECTION	BIT(0)
>   #define WDT_RESET_MASK1		0x1c
>   #define WDT_RESET_MASK2		0x20
> +#define   WDT_EVENT_COUNTER_MASK       (0xFFF << 8)
>   
>   /*
>    * WDT_RESET_WIDTH controls the characteristics of the external pulse (if
> @@ -459,8 +460,17 @@ static int aspeed_wdt_probe(struct platform_device *pdev)
>   	}
>   
>   	status = readl(wdt->base + WDT_TIMEOUT_STATUS);/BOOT_SECON
> -	if (status & WDT_TIMEOUT_STATUS_BOOT_SECONDARY) {
> -		wdt->wdd.bootstatus = WDIOF_CARDRESET;
> +
> +	if (of_device_is_compatible(np, "aspeed,ast2600-wdt")) {
> +		if (status & WDT_EVENT_COUNTER_MASK) {
> +			/*
> +			 * Reset cause by WatchDog
> +			 */
> +			wdt->wdd.bootstatus |= WDIOF_EXTERN1;
> +		}
> +	} else {
> +		if (status & WDT_TIMEOUT_STATUS_BOOT_SECONDARY)
> +			wdt->wdd.bootstatus = WDIOF_CARDRESET;
>   
>   		if (of_device_is_compatible(np, "aspeed,ast2400-wdt") ||
>   		    of_device_is_compatible(np, "aspeed,ast2500-wdt"))

This check is now unnecessary since it matches the else case.

Either case, it needs to be explained why WDIOF_CARDRESET ("Card previously
reset the CPU") is replaced by WDIOF_EXTERN1 ("External relay 1") for ast2600,
and why WDT_TIMEOUT_STATUS_BOOT_SECONDARY does not apply for ast2600 but
(status & WDT_EVENT_COUNTER_MASK) does.

Guenter
diff mbox series

Patch

diff --git a/drivers/watchdog/aspeed_wdt.c b/drivers/watchdog/aspeed_wdt.c
index b4773a6aaf8c..8adadd394be6 100644
--- a/drivers/watchdog/aspeed_wdt.c
+++ b/drivers/watchdog/aspeed_wdt.c
@@ -81,6 +81,7 @@  MODULE_DEVICE_TABLE(of, aspeed_wdt_of_table);
 #define   WDT_CLEAR_TIMEOUT_AND_BOOT_CODE_SELECTION	BIT(0)
 #define WDT_RESET_MASK1		0x1c
 #define WDT_RESET_MASK2		0x20
+#define   WDT_EVENT_COUNTER_MASK       (0xFFF << 8)
 
 /*
  * WDT_RESET_WIDTH controls the characteristics of the external pulse (if
@@ -459,8 +460,17 @@  static int aspeed_wdt_probe(struct platform_device *pdev)
 	}
 
 	status = readl(wdt->base + WDT_TIMEOUT_STATUS);
-	if (status & WDT_TIMEOUT_STATUS_BOOT_SECONDARY) {
-		wdt->wdd.bootstatus = WDIOF_CARDRESET;
+
+	if (of_device_is_compatible(np, "aspeed,ast2600-wdt")) {
+		if (status & WDT_EVENT_COUNTER_MASK) {
+			/*
+			 * Reset cause by WatchDog
+			 */
+			wdt->wdd.bootstatus |= WDIOF_EXTERN1;
+		}
+	} else {
+		if (status & WDT_TIMEOUT_STATUS_BOOT_SECONDARY)
+			wdt->wdd.bootstatus = WDIOF_CARDRESET;
 
 		if (of_device_is_compatible(np, "aspeed,ast2400-wdt") ||
 		    of_device_is_compatible(np, "aspeed,ast2500-wdt"))