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Diffstat (limited to 'drivers/leds/leds-pca9685.c')
-rw-r--r--drivers/leds/leds-pca9685.c213
1 files changed, 0 insertions, 213 deletions
diff --git a/drivers/leds/leds-pca9685.c b/drivers/leds/leds-pca9685.c
deleted file mode 100644
index 6e1ef3a9d6ef..000000000000
--- a/drivers/leds/leds-pca9685.c
+++ /dev/null
@@ -1,213 +0,0 @@
-/*
- * Copyright 2013 Maximilian Güntner <maximilian.guentner@gmail.com>
- *
- * 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.
- *
- * Based on leds-pca963x.c driver by
- * Peter Meerwald <p.meerwald@bct-electronic.com>
- *
- * Driver for the NXP PCA9685 12-Bit PWM LED driver chip.
- *
- */
-
-#include <linux/ctype.h>
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/i2c.h>
-#include <linux/leds.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/workqueue.h>
-
-#include <linux/platform_data/leds-pca9685.h>
-
-/* Register Addresses */
-#define PCA9685_MODE1 0x00
-#define PCA9685_MODE2 0x01
-#define PCA9685_LED0_ON_L 0x06
-#define PCA9685_ALL_LED_ON_L 0xFA
-
-/* MODE1 Register */
-#define PCA9685_ALLCALL 0x00
-#define PCA9685_SLEEP 0x04
-#define PCA9685_AI 0x05
-
-/* MODE2 Register */
-#define PCA9685_INVRT 0x04
-#define PCA9685_OUTDRV 0x02
-
-static const struct i2c_device_id pca9685_id[] = {
- { "pca9685", 0 },
- { }
-};
-MODULE_DEVICE_TABLE(i2c, pca9685_id);
-
-struct pca9685_led {
- struct i2c_client *client;
- struct work_struct work;
- u16 brightness;
- struct led_classdev led_cdev;
- int led_num; /* 0-15 */
- char name[32];
-};
-
-static void pca9685_write_msg(struct i2c_client *client, u8 *buf, u8 len)
-{
- struct i2c_msg msg = {
- .addr = client->addr,
- .flags = 0x00,
- .len = len,
- .buf = buf
- };
- i2c_transfer(client->adapter, &msg, 1);
-}
-
-static void pca9685_all_off(struct i2c_client *client)
-{
- u8 i2c_buffer[5] = {PCA9685_ALL_LED_ON_L, 0x00, 0x00, 0x00, 0x10};
- pca9685_write_msg(client, i2c_buffer, 5);
-}
-
-static void pca9685_led_work(struct work_struct *work)
-{
- struct pca9685_led *pca9685;
- u8 i2c_buffer[5];
-
- pca9685 = container_of(work, struct pca9685_led, work);
- i2c_buffer[0] = PCA9685_LED0_ON_L + 4 * pca9685->led_num;
- /*
- * 4095 is the maximum brightness, so we set the ON time to 0x1000
- * which disables the PWM generator for that LED
- */
- if (pca9685->brightness == 4095)
- *((__le16 *)(i2c_buffer+1)) = cpu_to_le16(0x1000);
- else
- *((__le16 *)(i2c_buffer+1)) = 0x0000;
-
- if (pca9685->brightness == 0)
- *((__le16 *)(i2c_buffer+3)) = cpu_to_le16(0x1000);
- else if (pca9685->brightness == 4095)
- *((__le16 *)(i2c_buffer+3)) = 0x0000;
- else
- *((__le16 *)(i2c_buffer+3)) = cpu_to_le16(pca9685->brightness);
-
- pca9685_write_msg(pca9685->client, i2c_buffer, 5);
-}
-
-static void pca9685_led_set(struct led_classdev *led_cdev,
- enum led_brightness value)
-{
- struct pca9685_led *pca9685;
- pca9685 = container_of(led_cdev, struct pca9685_led, led_cdev);
- pca9685->brightness = value;
-
- schedule_work(&pca9685->work);
-}
-
-static int pca9685_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct pca9685_led *pca9685;
- struct pca9685_platform_data *pdata;
- int err;
- u8 i;
-
- pdata = dev_get_platdata(&client->dev);
- if (pdata) {
- if (pdata->leds.num_leds < 1 || pdata->leds.num_leds > 15) {
- dev_err(&client->dev, "board info must claim 1-16 LEDs");
- return -EINVAL;
- }
- }
-
- pca9685 = devm_kzalloc(&client->dev, 16 * sizeof(*pca9685), GFP_KERNEL);
- if (!pca9685)
- return -ENOMEM;
-
- i2c_set_clientdata(client, pca9685);
- pca9685_all_off(client);
-
- for (i = 0; i < 16; i++) {
- pca9685[i].client = client;
- pca9685[i].led_num = i;
- pca9685[i].name[0] = '\0';
- if (pdata && i < pdata->leds.num_leds) {
- if (pdata->leds.leds[i].name)
- strncpy(pca9685[i].name,
- pdata->leds.leds[i].name,
- sizeof(pca9685[i].name)-1);
- if (pdata->leds.leds[i].default_trigger)
- pca9685[i].led_cdev.default_trigger =
- pdata->leds.leds[i].default_trigger;
- }
- if (strlen(pca9685[i].name) == 0) {
- /*
- * Write adapter and address to the name as well.
- * Otherwise multiple chips attached to one host would
- * not work.
- */
- snprintf(pca9685[i].name, sizeof(pca9685[i].name),
- "pca9685:%d:x%.2x:%d",
- client->adapter->nr, client->addr, i);
- }
- pca9685[i].led_cdev.name = pca9685[i].name;
- pca9685[i].led_cdev.max_brightness = 0xfff;
- pca9685[i].led_cdev.brightness_set = pca9685_led_set;
-
- INIT_WORK(&pca9685[i].work, pca9685_led_work);
- err = led_classdev_register(&client->dev, &pca9685[i].led_cdev);
- if (err < 0)
- goto exit;
- }
-
- if (pdata)
- i2c_smbus_write_byte_data(client, PCA9685_MODE2,
- pdata->outdrv << PCA9685_OUTDRV |
- pdata->inverted << PCA9685_INVRT);
- else
- i2c_smbus_write_byte_data(client, PCA9685_MODE2,
- PCA9685_TOTEM_POLE << PCA9685_OUTDRV);
- /* Enable Auto-Increment, enable oscillator, ALLCALL/SUBADDR disabled */
- i2c_smbus_write_byte_data(client, PCA9685_MODE1, BIT(PCA9685_AI));
-
- return 0;
-
-exit:
- while (i--) {
- led_classdev_unregister(&pca9685[i].led_cdev);
- cancel_work_sync(&pca9685[i].work);
- }
- return err;
-}
-
-static int pca9685_remove(struct i2c_client *client)
-{
- struct pca9685_led *pca9685 = i2c_get_clientdata(client);
- u8 i;
-
- for (i = 0; i < 16; i++) {
- led_classdev_unregister(&pca9685[i].led_cdev);
- cancel_work_sync(&pca9685[i].work);
- }
- pca9685_all_off(client);
- return 0;
-}
-
-static struct i2c_driver pca9685_driver = {
- .driver = {
- .name = "leds-pca9685",
- .owner = THIS_MODULE,
- },
- .probe = pca9685_probe,
- .remove = pca9685_remove,
- .id_table = pca9685_id,
-};
-
-module_i2c_driver(pca9685_driver);
-
-MODULE_AUTHOR("Maximilian Güntner <maximilian.guentner@gmail.com>");
-MODULE_DESCRIPTION("PCA9685 LED Driver");
-MODULE_LICENSE("GPL v2");

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