diff options
Diffstat (limited to 'target')
| -rw-r--r-- | target/linux/mediatek/files-5.10/drivers/leds/leds-ubnt-ledbar.c | 210 | ||||
| -rw-r--r-- | target/linux/mediatek/mt7622/config-5.10 | 5 |
2 files changed, 215 insertions, 0 deletions
diff --git a/target/linux/mediatek/files-5.10/drivers/leds/leds-ubnt-ledbar.c b/target/linux/mediatek/files-5.10/drivers/leds/leds-ubnt-ledbar.c new file mode 100644 index 0000000000..9c68d40eec --- /dev/null +++ b/target/linux/mediatek/files-5.10/drivers/leds/leds-ubnt-ledbar.c @@ -0,0 +1,210 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/leds.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/of.h> +#include <linux/of_gpio.h> +#include <linux/gpio/consumer.h> + +/** + * 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 0xaa + +#define UBNT_LEDBAR_TRANSACTION_BLUE_IDX 2 +#define UBNT_LEDBAR_TRANSACTION_GREEN_IDX 3 +#define UBNT_LEDBAR_TRANSACTION_RED_IDX 4 + +struct ubnt_ledbar { + struct mutex lock; + struct i2c_client *client; + struct led_classdev led_red; + struct led_classdev led_green; + struct led_classdev led_blue; + struct gpio_desc *enable_gpio; +}; + +static int ubnt_ledbar_perform_transaction(struct ubnt_ledbar *ledbar, + char *transaction) +{ + int ret; + int i; + + for (i = 0; i < UBNT_LEDBAR_TRANSACTION_LENGTH; i++) + i2c_smbus_write_byte(ledbar->client, transaction[i]); + + return 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, 0x01, 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; + + gpiod_set_raw_value(ledbar->enable_gpio, 1); + + msleep(10); + + i2c_response = ubnt_ledbar_perform_transaction(ledbar, setup_msg); + if (i2c_response != UBNT_LEDBAR_TRANSACTION_SUCCESS) { + dev_err(&ledbar->client->dev, "Error initializing LED transaction: %02x\n", ret); + ret = -EINVAL; + goto out_gpio; + } + + i2c_response = ubnt_ledbar_perform_transaction(ledbar, led_msg); + if (i2c_response != UBNT_LEDBAR_TRANSACTION_SUCCESS) { + dev_err(&ledbar->client->dev, "Failed LED transaction: %02x\n", ret); + ret = -EINVAL; + goto out_gpio; + } + + msleep(10); +out_gpio: + gpiod_set_raw_value(ledbar->enable_gpio, 0); + + mutex_unlock(&ledbar->lock); + + return ret; +} + +#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; + } + + gpiod_direction_output(ledbar->enable_gpio, 0); + + ledbar->client = client; + + mutex_init(&ledbar->lock); + + i2c_set_clientdata(client, 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 <mail@david-bauer.net>"); +MODULE_LICENSE("GPL v2"); diff --git a/target/linux/mediatek/mt7622/config-5.10 b/target/linux/mediatek/mt7622/config-5.10 index 7f1c3d169a..7df7968162 100644 --- a/target/linux/mediatek/mt7622/config-5.10 +++ b/target/linux/mediatek/mt7622/config-5.10 @@ -203,6 +203,10 @@ CONFIG_HAS_IOPORT_MAP=y CONFIG_HOLES_IN_ZONE=y CONFIG_HZ=250 CONFIG_HZ_250=y +CONFIG_I2C=y +CONFIG_I2C_BOARDINFO=y +CONFIG_I2C_CHARDEV=y +CONFIG_I2C_MT65XX=y CONFIG_ICPLUS_PHY=y CONFIG_IIO=y CONFIG_IKCONFIG=y @@ -217,6 +221,7 @@ CONFIG_IRQ_FORCED_THREADING=y CONFIG_IRQ_TIME_ACCOUNTING=y CONFIG_IRQ_WORK=y CONFIG_JUMP_LABEL=y +CONFIG_LEDS_UBNT_LEDBAR=y CONFIG_LIBFDT=y CONFIG_LLD_VERSION=0 CONFIG_LOCK_DEBUGGING_SUPPORT=y |