Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2024-12-28 16:52:18 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

watchdog: apple: Increase reset delay to 150ms

Browse Source 
The Apple A8X SoC seems to be slowest at resetting, taking up to around
125ms to reset. Wait 150ms to be safe here.

Signed-off-by: Nick Chan <towinchenmi@gmail.com>
Reviewed-by: Sven Peter <sven@svenpeter.dev>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20241001170018.20139-3-towinchenmi@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
Nick Chan 2024-10-02 00:59:52 +08:00 committed by Wim Van Sebroeck
parent 51dfe714c0
commit e6a08988eb
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/watchdog/apple_wdt.c
View File

@ -127,11 +127,11 @@ static int apple_wdt_restart(struct watchdog_device *wdd, unsigned long mode,
/*
* Flush writes and then wait for the SoC to reset. Even though the
* reset is queued almost immediately experiments have shown that it
* can take up to ~20-25ms until the SoC is actually reset. Just wait
* 50ms here to be safe.
* can take up to ~120-125ms until the SoC is actually reset. Just
* wait 150ms here to be safe.
*/
(void)readl(wdt->regs + APPLE_WDT_WD1_CUR_TIME);
mdelay(50);
mdelay(150);
return 0;
}