diff options
| author | NeilBrown <neilb@suse.de> | 2013-11-01 06:41:20 +0400 |
|---|---|---|
| committer | Bryan Wu <cooloney@gmail.com> | 2014-01-28 05:28:46 +0400 |
| commit | 10ead6e59934be76b6ce255d6b842a432b207b7f (patch) | |
| tree | aab76e123d6cda1cc9b3a484a3bdbf039e639c2c | |
| parent | 9334129e8e956edfd51da37d5e5278478235c7b2 (diff) | |
| download | linux-10ead6e59934be76b6ce255d6b842a432b207b7f.tar.xz | |
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>
| -rw-r--r-- | Documentation/devicetree/bindings/leds/tca6507.txt | 16 | ||||
| -rw-r--r-- | drivers/leds/leds-tca6507.c | 6 |
2 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/leds/tca6507.txt b/Documentation/devicetree/bindings/leds/tca6507.txt index 80ff3dfb1f32..d7221b84987c 100644 --- a/Documentation/devicetree/bindings/leds/tca6507.txt +++ b/Documentation/devicetree/bindings/leds/tca6507.txt @@ -2,6 +2,13 @@ LEDs connected to tca6507 Required properties: - compatible : should be : "ti,tca6507". +- #address-cells: must be 1 +- #size-cells: must be 0 +- reg: typically 0x45. + +Optional properties: +- gpio-controller: allows lines to be used as output-only GPIOs. +- #gpio-cells: if present, must be 0. Each led is represented as a sub-node of the ti,tca6507 device. @@ -10,6 +17,7 @@ LED sub-node properties: - reg : number of LED line (could be from 0 to 6) - linux,default-trigger : (optional) see Documentation/devicetree/bindings/leds/common.txt +- compatible: either "led" (the default) or "gpio". Examples: @@ -19,6 +27,9 @@ tca6507@45 { #size-cells = <0>; reg = <0x45>; + gpio-controller; + #gpio-cells = <2>; + led0: red-aux@0 { label = "red:aux"; reg = <0x0>; @@ -29,5 +40,10 @@ tca6507@45 { reg = <0x5>; linux,default-trigger = "default-on"; }; + + wifi-reset@6 { + reg = <0x6>; + compatible = "gpio"; + }; }; diff --git a/drivers/leds/leds-tca6507.c b/drivers/leds/leds-tca6507.c index f5063f447463..93a2b1759054 100644 --- a/drivers/leds/leds-tca6507.c +++ b/drivers/leds/leds-tca6507.c @@ -638,6 +638,9 @@ static int tca6507_probe_gpios(struct i2c_client *client, 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 @@ tca6507_led_dt_init(struct i2c_client *client) 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 @@ tca6507_led_dt_init(struct i2c_client *client) pdata->leds.leds = tca_leds; pdata->leds.num_leds = NUM_LEDS; + pdata->gpio_base = -1; return pdata; } |