diff options
| -rw-r--r-- | Documentation/devicetree/bindings/leds/leds-pca9532.txt | 39 | ||||
| -rw-r--r-- | drivers/leds/leds-pca9532.c | 75 | ||||
| -rw-r--r-- | include/dt-bindings/leds/leds-pca9532.h | 18 | ||||
| -rw-r--r-- | include/linux/leds-pca9532.h | 9 |
4 files changed, 132 insertions, 9 deletions
diff --git a/Documentation/devicetree/bindings/leds/leds-pca9532.txt b/Documentation/devicetree/bindings/leds/leds-pca9532.txt new file mode 100644 index 0000000..198f3ba --- /dev/null +++ b/Documentation/devicetree/bindings/leds/leds-pca9532.txt @@ -0,0 +1,39 @@ +*NXP - pca9532 PWM LED Driver + +The PCA9532 family is SMBus I/O expander optimized for dimming LEDs. +The PWM support 256 steps. + +Required properties: + - compatible: + "nxp,pca9530" + "nxp,pca9531" + "nxp,pca9532" + "nxp,pca9533" + - reg - I2C slave address + +Each led is represented as a sub-node of the nxp,pca9530. + +Optional sub-node properties: + - label: see Documentation/devicetree/bindings/leds/common.txt + - type: Output configuration, see dt-bindings/leds/leds-pca9532.h (default NONE) + - linux,default-trigger: see Documentation/devicetree/bindings/leds/common.txt + +Example: + #include <dt-bindings/leds/leds-pca9532.h> + + leds: pca9530@60 { + compatible = "nxp,pca9530"; + reg = <0x60>; + + red-power { + label = "pca:red:power"; + type = <PCA9532_TYPE_LED>; + }; + green-power { + label = "pca:green:power"; + type = <PCA9532_TYPE_LED>; + }; + }; + +For more product information please see the link below: +http://nxp.com/documents/data_sheet/PCA9532.pdf diff --git a/drivers/leds/leds-pca9532.c b/drivers/leds/leds-pca9532.c index e3d3b1a..09a7cffb 100644 --- a/drivers/leds/leds-pca9532.c +++ b/drivers/leds/leds-pca9532.c @@ -21,6 +21,8 @@ #include <linux/workqueue.h> #include <linux/leds-pca9532.h> #include <linux/gpio.h> +#include <linux/of.h> +#include <linux/of_device.h> /* m = num_leds*/ #define PCA9532_REG_INPUT(i) ((i) >> 3) @@ -86,9 +88,22 @@ static const struct pca9532_chip_info pca9532_chip_info_tbl[] = { }, }; +#ifdef CONFIG_OF +static const struct of_device_id of_pca9532_leds_match[] = { + { .compatible = "nxp,pca9530", .data = (void *)pca9530 }, + { .compatible = "nxp,pca9531", .data = (void *)pca9531 }, + { .compatible = "nxp,pca9532", .data = (void *)pca9532 }, + { .compatible = "nxp,pca9533", .data = (void *)pca9533 }, + {}, +}; + +MODULE_DEVICE_TABLE(of, of_pca9532_leds_match); +#endif + static struct i2c_driver pca9532_driver = { .driver = { .name = "leds-pca953x", + .of_match_table = of_match_ptr(of_pca9532_leds_match), }, .probe = pca9532_probe, .remove = pca9532_remove, @@ -354,6 +369,7 @@ static int pca9532_configure(struct i2c_client *client, led->state = pled->state; led->name = pled->name; led->ldev.name = led->name; + led->ldev.default_trigger = led->default_trigger; led->ldev.brightness = LED_OFF; led->ldev.brightness_set_blocking = pca9532_set_brightness; @@ -432,15 +448,66 @@ exit: return err; } +static struct pca9532_platform_data * +pca9532_of_populate_pdata(struct device *dev, struct device_node *np) +{ + struct pca9532_platform_data *pdata; + struct device_node *child; + const struct of_device_id *match; + int devid, maxleds; + int i = 0; + + match = of_match_device(of_pca9532_leds_match, dev); + if (!match) + return ERR_PTR(-ENODEV); + + devid = (int)(uintptr_t)match->data; + maxleds = pca9532_chip_info_tbl[devid].num_leds; + + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return ERR_PTR(-ENOMEM); + + for_each_child_of_node(np, child) { + if (of_property_read_string(child, "label", + &pdata->leds[i].name)) + pdata->leds[i].name = child->name; + of_property_read_u32(child, "type", &pdata->leds[i].type); + of_property_read_string(child, "linux,default-trigger", + &pdata->leds[i].default_trigger); + if (++i >= maxleds) { + of_node_put(child); + break; + } + } + + return pdata; +} + static int pca9532_probe(struct i2c_client *client, const struct i2c_device_id *id) { + int devid; struct pca9532_data *data = i2c_get_clientdata(client); struct pca9532_platform_data *pca9532_pdata = dev_get_platdata(&client->dev); - - if (!pca9532_pdata) - return -EIO; + struct device_node *np = client->dev.of_node; + + if (!pca9532_pdata) { + if (np) { + pca9532_pdata = + pca9532_of_populate_pdata(&client->dev, np); + if (IS_ERR(pca9532_pdata)) + return PTR_ERR(pca9532_pdata); + } else { + dev_err(&client->dev, "no platform data\n"); + return -EINVAL; + } + devid = (int)(uintptr_t)of_match_device( + of_pca9532_leds_match, &client->dev)->data; + } else { + devid = id->driver_data; + } if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) @@ -450,7 +517,7 @@ static int pca9532_probe(struct i2c_client *client, if (!data) return -ENOMEM; - data->chip_info = &pca9532_chip_info_tbl[id->driver_data]; + data->chip_info = &pca9532_chip_info_tbl[devid]; dev_info(&client->dev, "setting platform data\n"); i2c_set_clientdata(client, data); diff --git a/include/dt-bindings/leds/leds-pca9532.h b/include/dt-bindings/leds/leds-pca9532.h new file mode 100644 index 0000000..4d917aa --- /dev/null +++ b/include/dt-bindings/leds/leds-pca9532.h @@ -0,0 +1,18 @@ +/* + * This header provides constants for pca9532 LED bindings. + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#ifndef _DT_BINDINGS_LEDS_PCA9532_H +#define _DT_BINDINGS_LEDS_PCA9532_H + +#define PCA9532_TYPE_NONE 0 +#define PCA9532_TYPE_LED 1 +#define PCA9532_TYPE_N2100_BEEP 2 +#define PCA9532_TYPE_GPIO 3 +#define PCA9532_LED_TIMER2 4 + +#endif /* _DT_BINDINGS_LEDS_PCA9532_H */ diff --git a/include/linux/leds-pca9532.h b/include/linux/leds-pca9532.h index b8d6fff..d215b45 100644 --- a/include/linux/leds-pca9532.h +++ b/include/linux/leds-pca9532.h @@ -16,6 +16,7 @@ #include <linux/leds.h> #include <linux/workqueue.h> +#include <dt-bindings/leds/leds-pca9532.h> enum pca9532_state { PCA9532_OFF = 0x0, @@ -24,16 +25,14 @@ enum pca9532_state { PCA9532_PWM1 = 0x3 }; -enum pca9532_type { PCA9532_TYPE_NONE, PCA9532_TYPE_LED, - PCA9532_TYPE_N2100_BEEP, PCA9532_TYPE_GPIO }; - struct pca9532_led { u8 id; struct i2c_client *client; - char *name; + const char *name; + const char *default_trigger; struct led_classdev ldev; struct work_struct work; - enum pca9532_type type; + u32 type; enum pca9532_state state; }; |