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watchdog: bcm2835_wdt: consider system-power-controller property

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Until now all Raspberry Pi boards used the power off function of the SoC.
But the Raspberry Pi 400 uses gpio-poweroff for the whole board which
possibly cannot register the poweroff handler because the it's
already registered by this watchdog driver. So consider the
system-power-controller property for registering, which is already
defined in soc/bcm/brcm,bcm2835-pm.txt .

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Nicolas Saenz Julienne <nsaenz@kernel.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/1622981777-5023-3-git-send-email-stefan.wahren@i2se.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:
Stefan Wahren 2021-06-06 14:16:12 +02:00 • committed by Wim Van Sebroeck
parent 14244b7c04
commit a4f95810e3
1 changed files with 7 additions and 3 deletions
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10
drivers/watchdog/bcm2835_wdt.c
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@ -205,9 +205,13 @@ static int bcm2835_wdt_probe(struct platform_device *pdev)
if (err)
return err;
if (pm_power_off == NULL) {
pm_power_off = bcm2835_power_off;
bcm2835_power_off_wdt = wdt;
if (of_device_is_system_power_controller(pdev->dev.parent->of_node)) {
if (!pm_power_off) {
pm_power_off = bcm2835_power_off;
bcm2835_power_off_wdt = wdt;
} else {
dev_info(dev, "Poweroff handler already present!\n");
}
}
dev_info(dev, "Broadcom BCM2835 watchdog timer");