From 4363faef8a8c975410f001858b010170942aacfc Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Fri, 30 Sep 2022 11:26:47 +0200 Subject: kernel: move ubnt ledbar driver to a separate package Simplifies the tree by removing a non-upstream kernel patch and related kconfig symbols Signed-off-by: Felix Fietkau --- .../generic/files/drivers/leds/leds-ubnt-ledbar.c | 255 --------------------- 1 file changed, 255 deletions(-) delete mode 100644 target/linux/generic/files/drivers/leds/leds-ubnt-ledbar.c (limited to 'target/linux/generic/files') diff --git a/target/linux/generic/files/drivers/leds/leds-ubnt-ledbar.c b/target/linux/generic/files/drivers/leds/leds-ubnt-ledbar.c deleted file mode 100644 index 555340c5e8..0000000000 --- a/target/linux/generic/files/drivers/leds/leds-ubnt-ledbar.c +++ /dev/null @@ -1,255 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -/** - * Driver for the Ubiquiti RGB LED controller (LEDBAR). - * This Controller is based on a Holtek HT32F52241 and connected - * via I2C. - * - * - The Controller needs an enable signal set to high when - * performing a transaction. On the U6-LR, this is located - * at Pin 18 (R6902) - * - * - The Pin is also printed when calling the "usetled" function - * contained in the ubntapp bootloader application. - */ - -#define UBNT_LEDBAR_MAX_BRIGHTNESS 0xff - -#define UBNT_LEDBAR_TRANSACTION_LENGTH 8 -#define UBNT_LEDBAR_TRANSACTION_SUCCESS (char) 0xaa - -#define UBNT_LEDBAR_TRANSACTION_BLUE_IDX 2 -#define UBNT_LEDBAR_TRANSACTION_GREEN_IDX 3 -#define UBNT_LEDBAR_TRANSACTION_RED_IDX 4 -#define UBNT_LEDBAR_TRANSACTION_LED_COUNT_IDX 6 - -struct ubnt_ledbar { - struct mutex lock; - u32 led_count; - struct i2c_client *client; - struct led_classdev led_red; - struct led_classdev led_green; - struct led_classdev led_blue; - struct gpio_desc *enable_gpio; - struct gpio_desc *reset_gpio; -}; - -static void ubnt_ledbar_perform_transaction(struct ubnt_ledbar *ledbar, - const char *transaction, int len, - char *result, int result_len) -{ - int i; - - for (i = 0; i < len; i++) - i2c_smbus_write_byte(ledbar->client, transaction[i]); - - for (i = 0; i < result_len; i++) - result[i] = i2c_smbus_read_byte(ledbar->client); -} - -static int ubnt_ledbar_apply_state(struct ubnt_ledbar *ledbar) -{ - char setup_msg[UBNT_LEDBAR_TRANSACTION_LENGTH] = {0x40, 0x10, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x11}; - char led_msg[UBNT_LEDBAR_TRANSACTION_LENGTH] = {0x40, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00}; - char i2c_response; - int ret = 0; - - mutex_lock(&ledbar->lock); - - led_msg[UBNT_LEDBAR_TRANSACTION_BLUE_IDX] = ledbar->led_blue.brightness; - led_msg[UBNT_LEDBAR_TRANSACTION_GREEN_IDX] = ledbar->led_green.brightness; - led_msg[UBNT_LEDBAR_TRANSACTION_RED_IDX] = ledbar->led_red.brightness; - led_msg[UBNT_LEDBAR_TRANSACTION_LED_COUNT_IDX] = ledbar->led_count; - - gpiod_set_value(ledbar->enable_gpio, 1); - - msleep(10); - - ubnt_ledbar_perform_transaction(ledbar, setup_msg, sizeof(setup_msg), &i2c_response, sizeof(i2c_response)); - if (i2c_response != UBNT_LEDBAR_TRANSACTION_SUCCESS) { - dev_err(&ledbar->client->dev, "Error initializing LED transaction: %02hhx\n", i2c_response); - ret = -EINVAL; - goto out_gpio; - } - - ubnt_ledbar_perform_transaction(ledbar, led_msg, sizeof(led_msg), &i2c_response, sizeof(i2c_response)); - if (i2c_response != UBNT_LEDBAR_TRANSACTION_SUCCESS) { - dev_err(&ledbar->client->dev, "Failed LED transaction: %02hhx\n", i2c_response); - ret = -EINVAL; - goto out_gpio; - } - - msleep(10); -out_gpio: - gpiod_set_value(ledbar->enable_gpio, 0); - - mutex_unlock(&ledbar->lock); - - return ret; -} - -static void ubnt_ledbar_reset(struct ubnt_ledbar *ledbar) -{ - static const char init_msg[16] = {0x02, 0x81, 0xfd, 0x7e, - 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00}; - char init_response[4]; - - if (!ledbar->reset_gpio) - return; - - mutex_lock(&ledbar->lock); - - gpiod_set_value(ledbar->reset_gpio, 1); - msleep(10); - gpiod_set_value(ledbar->reset_gpio, 0); - - msleep(10); - - gpiod_set_value(ledbar->enable_gpio, 1); - msleep(10); - ubnt_ledbar_perform_transaction(ledbar, init_msg, sizeof(init_msg), init_response, sizeof(init_response)); - msleep(10); - gpiod_set_value(ledbar->enable_gpio, 0); - - mutex_unlock(&ledbar->lock); -} - -#define UBNT_LEDBAR_CONTROL_RGBS(name) \ -static int ubnt_ledbar_set_##name##_brightness(struct led_classdev *led_cdev,\ - enum led_brightness value) \ -{ \ - struct ubnt_ledbar *ledbar = \ - container_of(led_cdev, struct ubnt_ledbar, led_##name); \ - int ret; \ - led_cdev->brightness = value; \ - ret = ubnt_ledbar_apply_state(ledbar); \ - return ret; \ -} - -UBNT_LEDBAR_CONTROL_RGBS(red); -UBNT_LEDBAR_CONTROL_RGBS(green); -UBNT_LEDBAR_CONTROL_RGBS(blue); - - -static int ubnt_ledbar_init_led(struct device_node *np, struct ubnt_ledbar *ledbar, - struct led_classdev *led_cdev) -{ - struct led_init_data init_data = {}; - int ret; - - if (!np) - return 0; - - init_data.fwnode = of_fwnode_handle(np); - - led_cdev->max_brightness = UBNT_LEDBAR_MAX_BRIGHTNESS; - - ret = devm_led_classdev_register_ext(&ledbar->client->dev, led_cdev, - &init_data); - if (ret) - dev_err(&ledbar->client->dev, "led register err: %d\n", ret); - - return ret; -} - - -static int ubnt_ledbar_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct device_node *np = client->dev.of_node; - struct ubnt_ledbar *ledbar; - int ret; - - ledbar = devm_kzalloc(&client->dev, sizeof(*ledbar), GFP_KERNEL); - if (!ledbar) - return -ENOMEM; - - ledbar->enable_gpio = devm_gpiod_get(&client->dev, "enable", GPIOD_OUT_LOW); - - if (IS_ERR(ledbar->enable_gpio)) { - ret = PTR_ERR(ledbar->enable_gpio); - dev_err(&client->dev, "Failed to get enable gpio: %d\n", ret); - return ret; - } - - ledbar->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_LOW); - - if (IS_ERR(ledbar->reset_gpio)) { - ret = PTR_ERR(ledbar->reset_gpio); - dev_err(&client->dev, "Failed to get reset gpio: %d\n", ret); - return ret; - } - - ledbar->led_count = 1; - of_property_read_u32(np, "led-count", &ledbar->led_count); - - ledbar->client = client; - - mutex_init(&ledbar->lock); - - i2c_set_clientdata(client, ledbar); - - // Reset and initialize the MCU - ubnt_ledbar_reset(ledbar); - - ledbar->led_red.brightness_set_blocking = ubnt_ledbar_set_red_brightness; - ubnt_ledbar_init_led(of_get_child_by_name(np, "red"), ledbar, &ledbar->led_red); - - ledbar->led_green.brightness_set_blocking = ubnt_ledbar_set_green_brightness; - ubnt_ledbar_init_led(of_get_child_by_name(np, "green"), ledbar, &ledbar->led_green); - - ledbar->led_blue.brightness_set_blocking = ubnt_ledbar_set_blue_brightness; - ubnt_ledbar_init_led(of_get_child_by_name(np, "blue"), ledbar, &ledbar->led_blue); - - return ubnt_ledbar_apply_state(ledbar); -} - -static int ubnt_ledbar_remove(struct i2c_client *client) -{ - struct ubnt_ledbar *ledbar = i2c_get_clientdata(client); - - mutex_destroy(&ledbar->lock); - - return 0; -} - -static const struct i2c_device_id ubnt_ledbar_id[] = { - { "ubnt-ledbar", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, ubnt_ledbar_id); - -static const struct of_device_id of_ubnt_ledbar_match[] = { - { .compatible = "ubnt,ledbar", }, - {}, -}; -MODULE_DEVICE_TABLE(of, of_ubnt_ledbar_match); - -static struct i2c_driver ubnt_ledbar_driver = { - .driver = { - .name = "ubnt-ledbar", - .of_match_table = of_ubnt_ledbar_match, - }, - .probe = ubnt_ledbar_probe, - .remove = ubnt_ledbar_remove, - .id_table = ubnt_ledbar_id, -}; -module_i2c_driver(ubnt_ledbar_driver); - -MODULE_DESCRIPTION("Ubiquiti LEDBAR driver"); -MODULE_AUTHOR("David Bauer "); -MODULE_LICENSE("GPL v2"); -- cgit v1.2.3