LEDS: tca6507: add device-tree support for GPIO configuration.
The 7 lines driven by the TCA6507 can either drive LEDs or act as output-only
GPIOs.
To make this distinction in devicetree we use the "compatible" property.
If the device attached to a line is "compatible" with "gpio", we treat it
like a GPIO. If it is "compatible" with "led" (or if no "compatible" value
is set) we treat it like an LED.
(cooloney@gmail.com: fix typo in the subject)
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
diff --git a/drivers/leds/leds-tca6507.c b/drivers/leds/leds-tca6507.c
index f5063f4..93a2b17 100644
--- a/drivers/leds/leds-tca6507.c
+++ b/drivers/leds/leds-tca6507.c
@@ -638,6 +638,9 @@
tca->gpio.direction_output = tca6507_gpio_direction_output;
tca->gpio.set = tca6507_gpio_set_value;
tca->gpio.dev = &client->dev;
+#ifdef CONFIG_OF_GPIO
+ tca->gpio.of_node = of_node_get(client->dev.of_node);
+#endif
err = gpiochip_add(&tca->gpio);
if (err) {
tca->gpio.ngpio = 0;
@@ -696,6 +699,8 @@
led.default_trigger =
of_get_property(child, "linux,default-trigger", NULL);
led.flags = 0;
+ if (of_property_match_string(child, "compatible", "gpio") >= 0)
+ led.flags |= TCA6507_MAKE_GPIO;
ret = of_property_read_u32(child, "reg", ®);
if (ret != 0 || reg < 0 || reg >= NUM_LEDS)
continue;
@@ -709,6 +714,7 @@
pdata->leds.leds = tca_leds;
pdata->leds.num_leds = NUM_LEDS;
+ pdata->gpio_base = -1;
return pdata;
}