| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Dan Murphy | 1395 | 88.85% | 4 | 25.00% |
| Andrew F. Davis | 96 | 6.11% | 5 | 31.25% |
| Jacek Anaszewski | 49 | 3.12% | 1 | 6.25% |
| Andrew Lunn | 13 | 0.83% | 1 | 6.25% |
| Uwe Kleine-König | 10 | 0.64% | 2 | 12.50% |
| Marek Behún | 4 | 0.25% | 1 | 6.25% |
| Thomas Gleixner | 2 | 0.13% | 1 | 6.25% |
| Masanari Iida | 1 | 0.06% | 1 | 6.25% |
| Total | 1570 | 16 |
// SPDX-License-Identifier: GPL-2.0-only /* * TI LP8860 4-Channel LED Driver * * Copyright (C) 2014 Texas Instruments * * Author: Dan Murphy <dmurphy@ti.com> */ #include <linux/i2c.h> #include <linux/init.h> #include <linux/leds.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/of.h> #include <linux/gpio/consumer.h> #include <linux/slab.h> #define LP8860_DISP_CL1_BRT_MSB 0x00 #define LP8860_DISP_CL1_BRT_LSB 0x01 #define LP8860_DISP_CL1_CURR_MSB 0x02 #define LP8860_DISP_CL1_CURR_LSB 0x03 #define LP8860_CL2_BRT_MSB 0x04 #define LP8860_CL2_BRT_LSB 0x05 #define LP8860_CL2_CURRENT 0x06 #define LP8860_CL3_BRT_MSB 0x07 #define LP8860_CL3_BRT_LSB 0x08 #define LP8860_CL3_CURRENT 0x09 #define LP8860_CL4_BRT_MSB 0x0a #define LP8860_CL4_BRT_LSB 0x0b #define LP8860_CL4_CURRENT 0x0c #define LP8860_CONFIG 0x0d #define LP8860_STATUS 0x0e #define LP8860_FAULT 0x0f #define LP8860_LED_FAULT 0x10 #define LP8860_FAULT_CLEAR 0x11 #define LP8860_ID 0x12 #define LP8860_TEMP_MSB 0x13 #define LP8860_TEMP_LSB 0x14 #define LP8860_DISP_LED_CURR_MSB 0x15 #define LP8860_DISP_LED_CURR_LSB 0x16 #define LP8860_DISP_LED_PWM_MSB 0x17 #define LP8860_DISP_LED_PWM_LSB 0x18 #define LP8860_EEPROM_CNTRL 0x19 #define LP8860_EEPROM_UNLOCK 0x1a #define LP8860_EEPROM_REG_0 0x60 #define LP8860_EEPROM_REG_1 0x61 #define LP8860_EEPROM_REG_2 0x62 #define LP8860_EEPROM_REG_3 0x63 #define LP8860_EEPROM_REG_4 0x64 #define LP8860_EEPROM_REG_5 0x65 #define LP8860_EEPROM_REG_6 0x66 #define LP8860_EEPROM_REG_7 0x67 #define LP8860_EEPROM_REG_8 0x68 #define LP8860_EEPROM_REG_9 0x69 #define LP8860_EEPROM_REG_10 0x6a #define LP8860_EEPROM_REG_11 0x6b #define LP8860_EEPROM_REG_12 0x6c #define LP8860_EEPROM_REG_13 0x6d #define LP8860_EEPROM_REG_14 0x6e #define LP8860_EEPROM_REG_15 0x6f #define LP8860_EEPROM_REG_16 0x70 #define LP8860_EEPROM_REG_17 0x71 #define LP8860_EEPROM_REG_18 0x72 #define LP8860_EEPROM_REG_19 0x73 #define LP8860_EEPROM_REG_20 0x74 #define LP8860_EEPROM_REG_21 0x75 #define LP8860_EEPROM_REG_22 0x76 #define LP8860_EEPROM_REG_23 0x77 #define LP8860_EEPROM_REG_24 0x78 #define LP8860_LOCK_EEPROM 0x00 #define LP8860_UNLOCK_EEPROM 0x01 #define LP8860_PROGRAM_EEPROM 0x02 #define LP8860_EEPROM_CODE_1 0x08 #define LP8860_EEPROM_CODE_2 0xba #define LP8860_EEPROM_CODE_3 0xef #define LP8860_CLEAR_FAULTS 0x01 #define LP8860_NAME "lp8860" /** * struct lp8860_led * @lock: Lock for reading/writing the device * @client: Pointer to the I2C client * @led_dev: led class device pointer * @regmap: Devices register map * @eeprom_regmap: EEPROM register map */ struct lp8860_led { struct mutex lock; struct i2c_client *client; struct led_classdev led_dev; struct regmap *regmap; struct regmap *eeprom_regmap; }; static const struct reg_sequence lp8860_eeprom_disp_regs[] = { { LP8860_EEPROM_REG_0, 0xed }, { LP8860_EEPROM_REG_1, 0xdf }, { LP8860_EEPROM_REG_2, 0xdc }, { LP8860_EEPROM_REG_3, 0xf0 }, { LP8860_EEPROM_REG_4, 0xdf }, { LP8860_EEPROM_REG_5, 0xe5 }, { LP8860_EEPROM_REG_6, 0xf2 }, { LP8860_EEPROM_REG_7, 0x77 }, { LP8860_EEPROM_REG_8, 0x77 }, { LP8860_EEPROM_REG_9, 0x71 }, { LP8860_EEPROM_REG_10, 0x3f }, { LP8860_EEPROM_REG_11, 0xb7 }, { LP8860_EEPROM_REG_12, 0x17 }, { LP8860_EEPROM_REG_13, 0xef }, { LP8860_EEPROM_REG_14, 0xb0 }, { LP8860_EEPROM_REG_15, 0x87 }, { LP8860_EEPROM_REG_16, 0xce }, { LP8860_EEPROM_REG_17, 0x72 }, { LP8860_EEPROM_REG_18, 0xe5 }, { LP8860_EEPROM_REG_19, 0xdf }, { LP8860_EEPROM_REG_20, 0x35 }, { LP8860_EEPROM_REG_21, 0x06 }, { LP8860_EEPROM_REG_22, 0xdc }, { LP8860_EEPROM_REG_23, 0x88 }, { LP8860_EEPROM_REG_24, 0x3E }, }; static int lp8860_unlock_eeprom(struct lp8860_led *led) { int ret; guard(mutex)(&led->lock); ret = regmap_write(led->regmap, LP8860_EEPROM_UNLOCK, LP8860_EEPROM_CODE_1); if (ret) { dev_err(&led->client->dev, "EEPROM Unlock failed\n"); return ret; } ret = regmap_write(led->regmap, LP8860_EEPROM_UNLOCK, LP8860_EEPROM_CODE_2); if (ret) { dev_err(&led->client->dev, "EEPROM Unlock failed\n"); return ret; } ret = regmap_write(led->regmap, LP8860_EEPROM_UNLOCK, LP8860_EEPROM_CODE_3); if (ret) { dev_err(&led->client->dev, "EEPROM Unlock failed\n"); return ret; } return ret; } static int lp8860_fault_check(struct lp8860_led *led) { int ret, fault; unsigned int read_buf; ret = regmap_read(led->regmap, LP8860_LED_FAULT, &read_buf); if (ret) goto out; fault = read_buf; ret = regmap_read(led->regmap, LP8860_FAULT, &read_buf); if (ret) goto out; fault |= read_buf; /* Attempt to clear any faults */ if (fault) ret = regmap_write(led->regmap, LP8860_FAULT_CLEAR, LP8860_CLEAR_FAULTS); out: return ret; } static int lp8860_brightness_set(struct led_classdev *led_cdev, enum led_brightness brt_val) { struct lp8860_led *led = container_of(led_cdev, struct lp8860_led, led_dev); int disp_brightness = brt_val * 255; int ret; guard(mutex)(&led->lock); ret = lp8860_fault_check(led); if (ret) { dev_err(&led->client->dev, "Cannot read/clear faults\n"); return ret; } ret = regmap_write(led->regmap, LP8860_DISP_CL1_BRT_MSB, (disp_brightness & 0xff00) >> 8); if (ret) { dev_err(&led->client->dev, "Cannot write CL1 MSB\n"); return ret; } ret = regmap_write(led->regmap, LP8860_DISP_CL1_BRT_LSB, disp_brightness & 0xff); if (ret) { dev_err(&led->client->dev, "Cannot write CL1 LSB\n"); return ret; } return 0; } static int lp8860_init(struct lp8860_led *led) { unsigned int read_buf; int ret, reg_count; ret = lp8860_fault_check(led); if (ret) goto out; ret = regmap_read(led->regmap, LP8860_STATUS, &read_buf); if (ret) goto out; ret = lp8860_unlock_eeprom(led); if (ret) { dev_err(&led->client->dev, "Failed unlocking EEPROM\n"); goto out; } reg_count = ARRAY_SIZE(lp8860_eeprom_disp_regs); ret = regmap_multi_reg_write(led->eeprom_regmap, lp8860_eeprom_disp_regs, reg_count); if (ret) { dev_err(&led->client->dev, "Failed writing EEPROM\n"); goto out; } ret = regmap_write(led->regmap, LP8860_EEPROM_UNLOCK, LP8860_LOCK_EEPROM); if (ret) goto out; ret = regmap_write(led->regmap, LP8860_EEPROM_CNTRL, LP8860_PROGRAM_EEPROM); if (ret) { dev_err(&led->client->dev, "Failed programming EEPROM\n"); goto out; } return ret; out: return ret; } static const struct regmap_config lp8860_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = LP8860_EEPROM_UNLOCK, }; static const struct regmap_config lp8860_eeprom_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = LP8860_EEPROM_REG_24, }; static void lp8860_disable_gpio(void *data) { struct gpio_desc *gpio = data; gpiod_set_value(gpio, 0); } static int lp8860_probe(struct i2c_client *client) { int ret; struct lp8860_led *led; struct device_node *np = dev_of_node(&client->dev); struct device_node *child_node; struct led_init_data init_data = {}; struct gpio_desc *enable_gpio; led = devm_kzalloc(&client->dev, sizeof(*led), GFP_KERNEL); if (!led) return -ENOMEM; child_node = of_get_next_available_child(np, NULL); if (!child_node) return -EINVAL; enable_gpio = devm_gpiod_get_optional(&client->dev, "enable", GPIOD_OUT_LOW); if (IS_ERR(enable_gpio)) return dev_err_probe(&client->dev, PTR_ERR(enable_gpio), "Failed to get enable GPIO\n"); devm_add_action_or_reset(&client->dev, lp8860_disable_gpio, enable_gpio); ret = devm_regulator_get_enable_optional(&client->dev, "vled"); if (ret && ret != -ENODEV) return dev_err_probe(&client->dev, ret, "Failed to enable vled regulator\n"); led->client = client; led->led_dev.brightness_set_blocking = lp8860_brightness_set; devm_mutex_init(&client->dev, &led->lock); led->regmap = devm_regmap_init_i2c(client, &lp8860_regmap_config); if (IS_ERR(led->regmap)) { ret = PTR_ERR(led->regmap); dev_err(&client->dev, "Failed to allocate register map: %d\n", ret); return ret; } led->eeprom_regmap = devm_regmap_init_i2c(client, &lp8860_eeprom_regmap_config); if (IS_ERR(led->eeprom_regmap)) { ret = PTR_ERR(led->eeprom_regmap); dev_err(&client->dev, "Failed to allocate register map: %d\n", ret); return ret; } ret = lp8860_init(led); if (ret) return ret; init_data.fwnode = of_fwnode_handle(child_node); init_data.devicename = LP8860_NAME; init_data.default_label = ":display_cluster"; ret = devm_led_classdev_register_ext(&client->dev, &led->led_dev, &init_data); if (ret) { dev_err(&client->dev, "led register err: %d\n", ret); return ret; } return 0; } static const struct i2c_device_id lp8860_id[] = { { "lp8860" }, { } }; MODULE_DEVICE_TABLE(i2c, lp8860_id); static const struct of_device_id of_lp8860_leds_match[] = { { .compatible = "ti,lp8860", }, {}, }; MODULE_DEVICE_TABLE(of, of_lp8860_leds_match); static struct i2c_driver lp8860_driver = { .driver = { .name = "lp8860", .of_match_table = of_lp8860_leds_match, }, .probe = lp8860_probe, .id_table = lp8860_id, }; module_i2c_driver(lp8860_driver); MODULE_DESCRIPTION("Texas Instruments LP8860 LED driver"); MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>"); MODULE_LICENSE("GPL v2");
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1