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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>
This commit is contained in:
Kim, Milo 2013-05-07 00:14:49 -07:00 committed by Bryan Wu
parent 2dac912809
commit e015050cc5
2 changed files with 48 additions and 6 deletions
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37
Documentation/devicetree/bindings/leds/leds-lp55xx.txt
View File

@ -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>;
};
};

17
drivers/leds/leds-lp5562.c
View File

@ -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;
struct lp55xx_platform_data *pdata;
struct device_node *np = client->dev.of_node;
if (!pdata) {
dev_err(&client->dev, "no platform data\n");
return -EINVAL;
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);