diff options
| author | Flavio Suligoi <f.suligoi@asem.it> | 2026-03-23 13:52:04 +0100 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2026-05-03 08:40:32 -0700 |
| commit | 5abb70c8f7582950e490823f4a94a3597ada9d83 (patch) | |
| tree | b6da3292f8dcee193757ac8b7407a3e21ada15c0 /drivers/watchdog | |
| parent | d8207d1e9a36b1a8a461581b2d4073ea28335603 (diff) | |
watchdog: gpio_wdt: add ACPI support
The gpio_wdt device driver uses the device property APIs, so it is
firmware agnostic. For this reason we can now add the ACPI support in
Kconfig.
In this way it can be used seamlessly in ACPI and DT systems.
For example, a typical GPIO watchdog device configuration, in an ACPI
SSDT table, could be:
Device (WDOG) {
Name (_HID, "WDOG0001")
Name (_CID, "PRP0001")
Name (_UID, One)
Name (_CRS, ResourceTemplate () {
GpioIo (Exclusive, PullNone, 0, 0, IoRestrictionOutputOnly,
"\\_SB.GPI0", 0, ResourceConsumer, ,) { 3 }
})
Method (_STA, 0, NotSerialized) {
Return (0x0F)
}
Name (_DSD, Package (2)
{
ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
Package (5)
{
Package () { "compatible", Package() { "linux,wdt-gpio" } },
Package () { "hw_algo", "toggle" },
Package () { "gpios", Package () { ^WDOG, 0, 0, 0 } },
Package () { "hw_margin_ms", 2000 },
Package () { "always-running", 1 },
},
})
}
Signed-off-by: Flavio Suligoi <f.suligoi@asem.it>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20260323125204.164785-2-f.suligoi@asem.it
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/watchdog')
| -rw-r--r-- | drivers/watchdog/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index e19872c0ae61..8de43b614bb7 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -250,7 +250,7 @@ config DA9062_WATCHDOG config GPIO_WATCHDOG tristate "Watchdog device controlled through GPIO-line" - depends on OF_GPIO + depends on (ACPI && GPIOLIB) || OF_GPIO select WATCHDOG_CORE help If you say yes here you get support for watchdog device |