leds: lp5562: support the device tree feature

The LP55xx DT structure is applicable to the LP5562 device.
The driver and documentation are updated.

Compatible property of the DT
: LP5521 and LP5223 were manufactured by National Semiconductor.
  LP5562 is a new device from Texas Instruments.

Cc: Gabriel Fernandez <gabriel.fernandez@stericsson.com>
Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bryan Wu <cooloney@gmail.com>

diff --git a/Documentation/devicetree/bindings/leds/leds-lp55xx.txt b/Documentation/devicetree/bindings/leds/leds-lp55xx.txt
index 1ed6bb0ce7775ef5b2bfea6d27a98a135183403a..d5176882d8b999563f11a25a6cb806caf0e863d6 100644 (file)
--- a/Documentation/devicetree/bindings/leds/leds-lp55xx.txt
+++ b/Documentation/devicetree/bindings/leds/leds-lp55xx.txt
@@ -1,7 +1,7 @@
-Binding for National Semiconductor LP55xx Led Drivers
+Binding for TI/National Semiconductor LP55xx Led Drivers
 
 Required properties:
-- compatible: "national,lp5521" or "national,lp5523"
+- compatible: "national,lp5521" or "national,lp5523" or "ti,lp5562"
 - reg: I2C slave address
 - clock-mode: Input clock mode, (0: automode, 1: internal, 2: external)
 
@@ -112,3 +112,36 @@ lp5523@32 {
                max-cur = /bits/ 8 <0x20>;
        };
 };
+
+example 3) LP5562
+4 channels are defined.
+
+lp5562@30 {
+       compatible = "ti,lp5562";
+       reg = <0x30>;
+       clock-mode = /bits/8 <2>;
+
+       chan0 {
+               chan-name = "R";
+               led-cur = /bits/ 8 <0x20>;
+               max-cur = /bits/ 8 <0x60>;
+       };
+
+       chan1 {
+               chan-name = "G";
+               led-cur = /bits/ 8 <0x20>;
+               max-cur = /bits/ 8 <0x60>;
+       };
+
+       chan2 {
+               chan-name = "B";
+               led-cur = /bits/ 8 <0x20>;
+               max-cur = /bits/ 8 <0x60>;
+       };
+
+       chan3 {
+               chan-name = "W";
+               led-cur = /bits/ 8 <0x20>;
+               max-cur = /bits/ 8 <0x60>;
+       };
+};

diff --git a/drivers/leds/leds-lp5562.c b/drivers/leds/leds-lp5562.c
index 513f2390ca2d8d279079c2939c109dae06c05f45..e53bcb89a9783b94011ec1309ad8ef11b1ff4907 100644 (file)
--- a/drivers/leds/leds-lp5562.c
+++ b/drivers/leds/leds-lp5562.c
@@ -515,12 +515,20 @@ static int lp5562_probe(struct i2c_client *client,
        int ret;
        struct lp55xx_chip *chip;
        struct lp55xx_led *led;
-       struct lp55xx_platform_data *pdata = client->dev.platform_data;
-
-       if (!pdata) {
-               dev_err(&client->dev, "no platform data\n");
-               return -EINVAL;
+       struct lp55xx_platform_data *pdata;
+       struct device_node *np = client->dev.of_node;
+
+       if (!client->dev.platform_data) {
+               if (np) {
+                       ret = lp55xx_of_populate_pdata(&client->dev, np);
+                       if (ret < 0)
+                               return ret;
+               } else {
+                       dev_err(&client->dev, "no platform data\n");
+                       return -EINVAL;
+               }
        }
+       pdata = client->dev.platform_data;
 
        chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
        if (!chip)
@@ -579,6 +587,7 @@ static int lp5562_remove(struct i2c_client *client)
 
 static const struct i2c_device_id lp5562_id[] = {
        { "lp5562", 0 },
+       { "ti,lp5562", 0 }, /* OF compatible */
        { }
 };
 MODULE_DEVICE_TABLE(i2c, lp5562_id);