static void
gpioleds_attach_led(struct gpioleds_softc *sc, phandle_t node,
struct gpioled *led)
{
char *name;
int state, err;
char *default_state;
led->parent_sc = sc;
state = 0;
if (OF_getprop_alloc(node, "default-state",
sizeof(char), (void **)&default_state) != -1) {
if (strcasecmp(default_state, "on") == 0)
state = 1;
else if (strcasecmp(default_state, "off") == 0)
state = 0;
else if (strcasecmp(default_state, "keep") == 0)
state = -1;
else {
state = -1;
device_printf(sc->sc_dev,
"unknown value for default-state in FDT\n");
}
OF_prop_free(default_state);
}
name = NULL;
if (OF_getprop_alloc(node, "label", 1, (void **)&name) == -1)
OF_getprop_alloc(node, "name", 1, (void **)&name);
if (name == NULL) {
device_printf(sc->sc_dev,
"no name provided for gpio LED, skipping\n");
return;
}
err = gpio_pin_get_by_ofw_idx(sc->sc_dev, node, 0, &led->pin);
if (err) {
device_printf(sc->sc_dev, "<%s> failed to map pin\n", name);
if (name)
OF_prop_free(name);
return;
}
gpio_pin_setflags(led->pin, GPIO_PIN_OUTPUT);
led->leddev = led_create_state(gpioled_control, led, name,
state);
if (name != NULL)
OF_prop_free(name);
}
int
gpio_pin_get_by_ofw_name(device_t consumer, phandle_t node,
char *name, gpio_pin_t *pin)
{
int rv, idx;
KASSERT(consumer != NULL && node > 0,
("both consumer and node required"));
rv = ofw_bus_find_string_index(node, "gpio-names", name, &idx);
if (rv != 0)
return (rv);
return (gpio_pin_get_by_ofw_idx(consumer, node, idx, pin));
}
static int
gpiobacklight_attach(device_t dev)
{
struct gpiobacklight_softc *sc;
struct sysctl_ctx_list *ctx;
struct sysctl_oid *tree;
phandle_t node;
sc = device_get_softc(dev);
if ((node = ofw_bus_get_node(dev)) == -1)
return (ENXIO);
if (OF_hasprop(node, "default-on"))
sc->sc_brightness = true;
else
sc->sc_brightness = false;
gpio_pin_get_by_ofw_idx(dev, node, 0, &sc->sc_pin);
if (sc->sc_pin == NULL) {
device_printf(dev, "failed to map GPIO pin\n");
return (ENXIO);
}
gpio_pin_setflags(sc->sc_pin, GPIO_PIN_OUTPUT);
gpiobacklight_update_brightness(sc);
/* Init backlight interface */
ctx = device_get_sysctl_ctx(dev);
tree = device_get_sysctl_tree(dev);
sc->sc_oid = SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
"brightness", CTLTYPE_INT | CTLFLAG_RW, sc, 0,
gpiobacklight_sysctl, "I", "backlight brightness");
return (0);
}
