From 30e055280e3a27faa6af752fe8a6083bfcc906e3 Mon Sep 17 00:00:00 2001 From: Milton Miller Date: Fri, 9 Mar 2018 16:02:59 -0600 Subject: watchdog: aspeed: Allow configuring for alternate boot Allow the device tree to specify a watchdog to fallover to the alternate boot source. The aspeeed watchdog can set a latch directing flash chip select 0 to chip select 1, allowing boot from an alternate media if the watchdog is not reset in time. On the ast2400 bank 1 also goes to flash bank 1, while on the ast2500 the chip selects are swapped. OpenBMC-Staging-Count: 2 Signed-off-by: Milton Miller Signed-off-by: Eddie James Reviewed-by: Guenter Roeck Signed-off-by: Joel Stanley --- drivers/watchdog/aspeed_wdt.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/watchdog/aspeed_wdt.c b/drivers/watchdog/aspeed_wdt.c index d1987d63b37c..f41d2467f198 100644 --- a/drivers/watchdog/aspeed_wdt.c +++ b/drivers/watchdog/aspeed_wdt.c @@ -46,6 +46,7 @@ MODULE_DEVICE_TABLE(of, aspeed_wdt_of_table); #define WDT_RELOAD_VALUE 0x04 #define WDT_RESTART 0x08 #define WDT_CTRL 0x0C +#define WDT_CTRL_BOOT_SECONDARY BIT(7) #define WDT_CTRL_RESET_MODE_SOC (0x00 << 5) #define WDT_CTRL_RESET_MODE_FULL_CHIP (0x01 << 5) #define WDT_CTRL_RESET_MODE_ARM_CPU (0x10 << 5) @@ -245,6 +246,8 @@ static int aspeed_wdt_probe(struct platform_device *pdev) } if (of_property_read_bool(np, "aspeed,external-signal")) wdt->ctrl |= WDT_CTRL_WDT_EXT; + if (of_property_read_bool(np, "aspeed,alt-boot")) + wdt->ctrl |= WDT_CTRL_BOOT_SECONDARY; if (readl(wdt->base + WDT_CTRL) & WDT_CTRL_ENABLE) { /* -- cgit v1.2.3