diff options
Diffstat (limited to 'drivers/leds/leds-pca9633.c')
| -rw-r--r-- | drivers/leds/leds-pca9633.c | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/drivers/leds/leds-pca9633.c b/drivers/leds/leds-pca9633.c deleted file mode 100644 index 9aae5679ffb2..000000000000 --- a/drivers/leds/leds-pca9633.c +++ /dev/null @@ -1,194 +0,0 @@ -/* - * Copyright 2011 bct electronic GmbH - * - * Author: Peter Meerwald <p.meerwald@bct-electronic.com> - * - * Based on leds-pca955x.c - * - * This file is subject to the terms and conditions of version 2 of - * the GNU General Public License. See the file COPYING in the main - * directory of this archive for more details. - * - * LED driver for the PCA9633 I2C LED driver (7-bit slave address 0x62) - * - */ - -#include <linux/module.h> -#include <linux/delay.h> -#include <linux/string.h> -#include <linux/ctype.h> -#include <linux/leds.h> -#include <linux/err.h> -#include <linux/i2c.h> -#include <linux/workqueue.h> -#include <linux/slab.h> -#include <linux/platform_data/leds-pca9633.h> - -/* LED select registers determine the source that drives LED outputs */ -#define PCA9633_LED_OFF 0x0 /* LED driver off */ -#define PCA9633_LED_ON 0x1 /* LED driver on */ -#define PCA9633_LED_PWM 0x2 /* Controlled through PWM */ -#define PCA9633_LED_GRP_PWM 0x3 /* Controlled through PWM/GRPPWM */ - -#define PCA9633_MODE1 0x00 -#define PCA9633_MODE2 0x01 -#define PCA9633_PWM_BASE 0x02 -#define PCA9633_LEDOUT 0x08 - -static const struct i2c_device_id pca9633_id[] = { - { "pca9633", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, pca9633_id); - -struct pca9633_led { - struct i2c_client *client; - struct work_struct work; - enum led_brightness brightness; - struct led_classdev led_cdev; - int led_num; /* 0 .. 3 potentially */ - char name[32]; -}; - -static void pca9633_led_work(struct work_struct *work) -{ - struct pca9633_led *pca9633 = container_of(work, - struct pca9633_led, work); - u8 ledout = i2c_smbus_read_byte_data(pca9633->client, PCA9633_LEDOUT); - int shift = 2 * pca9633->led_num; - u8 mask = 0x3 << shift; - - switch (pca9633->brightness) { - case LED_FULL: - i2c_smbus_write_byte_data(pca9633->client, PCA9633_LEDOUT, - (ledout & ~mask) | (PCA9633_LED_ON << shift)); - break; - case LED_OFF: - i2c_smbus_write_byte_data(pca9633->client, PCA9633_LEDOUT, - ledout & ~mask); - break; - default: - i2c_smbus_write_byte_data(pca9633->client, - PCA9633_PWM_BASE + pca9633->led_num, - pca9633->brightness); - i2c_smbus_write_byte_data(pca9633->client, PCA9633_LEDOUT, - (ledout & ~mask) | (PCA9633_LED_PWM << shift)); - break; - } -} - -static void pca9633_led_set(struct led_classdev *led_cdev, - enum led_brightness value) -{ - struct pca9633_led *pca9633; - - pca9633 = container_of(led_cdev, struct pca9633_led, led_cdev); - - pca9633->brightness = value; - - /* - * Must use workqueue for the actual I/O since I2C operations - * can sleep. - */ - schedule_work(&pca9633->work); -} - -static int pca9633_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct pca9633_led *pca9633; - struct pca9633_platform_data *pdata; - int i, err; - - pdata = client->dev.platform_data; - - if (pdata) { - if (pdata->leds.num_leds <= 0 || pdata->leds.num_leds > 4) { - dev_err(&client->dev, "board info must claim at most 4 LEDs"); - return -EINVAL; - } - } - - pca9633 = devm_kzalloc(&client->dev, 4 * sizeof(*pca9633), GFP_KERNEL); - if (!pca9633) - return -ENOMEM; - - i2c_set_clientdata(client, pca9633); - - for (i = 0; i < 4; i++) { - pca9633[i].client = client; - pca9633[i].led_num = i; - - /* Platform data can specify LED names and default triggers */ - if (pdata && i < pdata->leds.num_leds) { - if (pdata->leds.leds[i].name) - snprintf(pca9633[i].name, - sizeof(pca9633[i].name), "pca9633:%s", - pdata->leds.leds[i].name); - if (pdata->leds.leds[i].default_trigger) - pca9633[i].led_cdev.default_trigger = - pdata->leds.leds[i].default_trigger; - } else { - snprintf(pca9633[i].name, sizeof(pca9633[i].name), - "pca9633:%d", i); - } - - pca9633[i].led_cdev.name = pca9633[i].name; - pca9633[i].led_cdev.brightness_set = pca9633_led_set; - - INIT_WORK(&pca9633[i].work, pca9633_led_work); - - err = led_classdev_register(&client->dev, &pca9633[i].led_cdev); - if (err < 0) - goto exit; - } - - /* Disable LED all-call address and set normal mode */ - i2c_smbus_write_byte_data(client, PCA9633_MODE1, 0x00); - - /* Configure output: open-drain or totem pole (push-pull) */ - if (pdata && pdata->outdrv == PCA9633_OPEN_DRAIN) - i2c_smbus_write_byte_data(client, PCA9633_MODE2, 0x01); - - /* Turn off LEDs */ - i2c_smbus_write_byte_data(client, PCA9633_LEDOUT, 0x00); - - return 0; - -exit: - while (i--) { - led_classdev_unregister(&pca9633[i].led_cdev); - cancel_work_sync(&pca9633[i].work); - } - - return err; -} - -static int pca9633_remove(struct i2c_client *client) -{ - struct pca9633_led *pca9633 = i2c_get_clientdata(client); - int i; - - for (i = 0; i < 4; i++) { - led_classdev_unregister(&pca9633[i].led_cdev); - cancel_work_sync(&pca9633[i].work); - } - - return 0; -} - -static struct i2c_driver pca9633_driver = { - .driver = { - .name = "leds-pca9633", - .owner = THIS_MODULE, - }, - .probe = pca9633_probe, - .remove = pca9633_remove, - .id_table = pca9633_id, -}; - -module_i2c_driver(pca9633_driver); - -MODULE_AUTHOR("Peter Meerwald <p.meerwald@bct-electronic.com>"); -MODULE_DESCRIPTION("PCA9633 LED driver"); -MODULE_LICENSE("GPL v2"); |