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aspeed: watchdog: Set bootstatus during probe

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Check the aspeed timeout status register to see if the system has booted
from the secondary boot source. If so, set the watchdog device
bootstatus flag for "Card previously reset the CPU."

Signed-off-by: Eddie James <eajames@linux.vnet.ibm.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Eddie James 2018-03-27 15:09:27 -05:00 committed by Wim Van Sebroeck
parent fdac6a90d2
commit 49d4d277ca
1 changed files with 7 additions and 0 deletions
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7
drivers/watchdog/aspeed_wdt.c
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@ -55,6 +55,8 @@ MODULE_DEVICE_TABLE(of, aspeed_wdt_of_table);
#define WDT_CTRL_WDT_INTR BIT(2)
#define WDT_CTRL_RESET_SYSTEM BIT(1)
#define WDT_CTRL_ENABLE BIT(0)
#define WDT_TIMEOUT_STATUS 0x10
#define WDT_TIMEOUT_STATUS_BOOT_SECONDARY BIT(1)
/*
* WDT_RESET_WIDTH controls the characteristics of the external pulse (if
@ -192,6 +194,7 @@ static int aspeed_wdt_probe(struct platform_device *pdev)
struct device_node *np;
const char *reset_type;
u32 duration;
u32 status;
int ret;
wdt = devm_kzalloc(&pdev->dev, sizeof(*wdt), GFP_KERNEL);
@ -307,6 +310,10 @@ static int aspeed_wdt_probe(struct platform_device *pdev)
writel(duration - 1, wdt->base + WDT_RESET_WIDTH);
}
status = readl(wdt->base + WDT_TIMEOUT_STATUS);
if (status & WDT_TIMEOUT_STATUS_BOOT_SECONDARY)
wdt->wdd.bootstatus = WDIOF_CARDRESET;
ret = devm_watchdog_register_device(&pdev->dev, &wdt->wdd);
if (ret) {
dev_err(&pdev->dev, "failed to register\n");