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[bytgpio] prepare bytgpio(4) for modularization

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- Add detach method
- module should depend on gpiobus, not gpio
This commit is contained in:
Oleksandr Tymoshenko 2016-11-21 19:43:01 +00:00
parent ef022bb1de
commit fd98051117
1 changed files with 30 additions and 3 deletions
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33
sys/dev/gpio/bytgpio.c
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@ -86,6 +86,7 @@ struct bytgpio_softc {
static int bytgpio_probe(device_t dev);
static int bytgpio_attach(device_t dev);
static int bytgpio_detach(device_t dev);
#define SCORE_UID 1
#define SCORE_BANK_PREFIX "GPIO_S0_SC"
@ -567,6 +568,8 @@ bytgpio_attach(device_t dev)
return (ENXIO);
}
BYTGPIO_LOCK_INIT(sc);
switch (uid) {
case SCORE_UID:
sc->sc_npins = SCORE_PINS;
@ -599,8 +602,6 @@ bytgpio_attach(device_t dev)
goto error;
}
BYTGPIO_LOCK_INIT(sc);
for (pin = 0; pin < sc->sc_npins; pin++) {
reg = BYGPIO_PIN_REGISTER(sc, pin, BYTGPIO_PCONF0);
val = bytgpio_read_4(sc, reg);
@ -618,13 +619,39 @@ bytgpio_attach(device_t dev)
return (0);
error:
BYTGPIO_LOCK_DESTROY(sc);
return (ENXIO);
}
static int
bytgpio_detach(device_t dev)
{
struct bytgpio_softc *sc;
sc = device_get_softc(dev);
if (sc->sc_busdev)
gpiobus_detach_bus(dev);
BYTGPIO_LOCK_DESTROY(sc);
if (sc->sc_pad_funcs)
free(sc->sc_pad_funcs, M_DEVBUF);
if (sc->sc_mem_res != NULL)
bus_release_resource(dev, SYS_RES_MEMORY,
sc->sc_mem_rid, sc->sc_mem_res);
return (0);
}
static device_method_t bytgpio_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, bytgpio_probe),
DEVMETHOD(device_attach, bytgpio_attach),
DEVMETHOD(device_detach, bytgpio_detach),
/* GPIO protocol */
DEVMETHOD(gpio_get_bus, bytgpio_get_bus),
@ -649,4 +676,4 @@ static driver_t bytgpio_driver = {
static devclass_t bytgpio_devclass;
DRIVER_MODULE(bytgpio, acpi, bytgpio_driver, bytgpio_devclass, 0, 0);
MODULE_DEPEND(bytgpio, acpi, 1, 1, 1);
MODULE_DEPEND(bytgpio, gpio, 1, 1, 1);
MODULE_DEPEND(bytgpio, gpiobus, 1, 1, 1);