| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Dan Murphy | 2154 | 98.04% | 6 | 54.55% |
| Uwe Kleine-König | 20 | 0.91% | 1 | 9.09% |
| Andrew Lunn | 18 | 0.82% | 1 | 9.09% |
| Axel Lin | 2 | 0.09% | 1 | 9.09% |
| Thomas Gleixner | 2 | 0.09% | 1 | 9.09% |
| Masanari Iida | 1 | 0.05% | 1 | 9.09% |
| Total | 2197 | 11 |
// 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/of_gpio.h> #include <linux/gpio/consumer.h> #include <linux/slab.h> #include <uapi/linux/uleds.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 /** * 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 * @enable_gpio - VDDIO/EN gpio to enable communication interface * @regulator - LED supply regulator pointer * @label - LED label */ struct lp8860_led { struct mutex lock; struct i2c_client *client; struct led_classdev led_dev; struct regmap *regmap; struct regmap *eeprom_regmap; struct gpio_desc *enable_gpio; struct regulator *regulator; char label[LED_MAX_NAME_SIZE]; }; struct lp8860_eeprom_reg { uint8_t reg; uint8_t value; }; static struct lp8860_eeprom_reg 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 lock) { int ret; mutex_lock(&led->lock); if (lock == LP8860_UNLOCK_EEPROM) { ret = regmap_write(led->regmap, LP8860_EEPROM_UNLOCK, LP8860_EEPROM_CODE_1); if (ret) { dev_err(&led->client->dev, "EEPROM Unlock failed\n"); goto out; } ret = regmap_write(led->regmap, LP8860_EEPROM_UNLOCK, LP8860_EEPROM_CODE_2); if (ret) { dev_err(&led->client->dev, "EEPROM Unlock failed\n"); goto out; } ret = regmap_write(led->regmap, LP8860_EEPROM_UNLOCK, LP8860_EEPROM_CODE_3); if (ret) { dev_err(&led->client->dev, "EEPROM Unlock failed\n"); goto out; } } else { ret = regmap_write(led->regmap, LP8860_EEPROM_UNLOCK, LP8860_LOCK_EEPROM); } out: mutex_unlock(&led->lock); 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; mutex_lock(&led->lock); ret = lp8860_fault_check(led); if (ret) { dev_err(&led->client->dev, "Cannot read/clear faults\n"); goto out; } 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"); goto out; } 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"); goto out; } out: mutex_unlock(&led->lock); return ret; } static int lp8860_init(struct lp8860_led *led) { unsigned int read_buf; int ret, i, reg_count; if (led->regulator) { ret = regulator_enable(led->regulator); if (ret) { dev_err(&led->client->dev, "Failed to enable regulator\n"); return ret; } } if (led->enable_gpio) gpiod_direction_output(led->enable_gpio, 1); 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, LP8860_UNLOCK_EEPROM); if (ret) { dev_err(&led->client->dev, "Failed unlocking EEPROM\n"); goto out; } reg_count = ARRAY_SIZE(lp8860_eeprom_disp_regs) / sizeof(lp8860_eeprom_disp_regs[0]); for (i = 0; i < reg_count; i++) { ret = regmap_write(led->eeprom_regmap, lp8860_eeprom_disp_regs[i].reg, lp8860_eeprom_disp_regs[i].value); if (ret) { dev_err(&led->client->dev, "Failed writing EEPROM\n"); goto out; } } ret = lp8860_unlock_eeprom(led, 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: if (ret) if (led->enable_gpio) gpiod_direction_output(led->enable_gpio, 0); if (led->regulator) { ret = regulator_disable(led->regulator); if (ret) dev_err(&led->client->dev, "Failed to disable regulator\n"); } return ret; } static const struct reg_default lp8860_reg_defs[] = { { LP8860_DISP_CL1_BRT_MSB, 0x00}, { LP8860_DISP_CL1_BRT_LSB, 0x00}, { LP8860_DISP_CL1_CURR_MSB, 0x00}, { LP8860_DISP_CL1_CURR_LSB, 0x00}, { LP8860_CL2_BRT_MSB, 0x00}, { LP8860_CL2_BRT_LSB, 0x00}, { LP8860_CL2_CURRENT, 0x00}, { LP8860_CL3_BRT_MSB, 0x00}, { LP8860_CL3_BRT_LSB, 0x00}, { LP8860_CL3_CURRENT, 0x00}, { LP8860_CL4_BRT_MSB, 0x00}, { LP8860_CL4_BRT_LSB, 0x00}, { LP8860_CL4_CURRENT, 0x00}, { LP8860_CONFIG, 0x00}, { LP8860_FAULT_CLEAR, 0x00}, { LP8860_EEPROM_CNTRL, 0x80}, { LP8860_EEPROM_UNLOCK, 0x00}, }; static const struct regmap_config lp8860_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = LP8860_EEPROM_UNLOCK, .reg_defaults = lp8860_reg_defs, .num_reg_defaults = ARRAY_SIZE(lp8860_reg_defs), .cache_type = REGCACHE_NONE, }; static const struct reg_default lp8860_eeprom_defs[] = { { LP8860_EEPROM_REG_0, 0x00 }, { LP8860_EEPROM_REG_1, 0x00 }, { LP8860_EEPROM_REG_2, 0x00 }, { LP8860_EEPROM_REG_3, 0x00 }, { LP8860_EEPROM_REG_4, 0x00 }, { LP8860_EEPROM_REG_5, 0x00 }, { LP8860_EEPROM_REG_6, 0x00 }, { LP8860_EEPROM_REG_7, 0x00 }, { LP8860_EEPROM_REG_8, 0x00 }, { LP8860_EEPROM_REG_9, 0x00 }, { LP8860_EEPROM_REG_10, 0x00 }, { LP8860_EEPROM_REG_11, 0x00 }, { LP8860_EEPROM_REG_12, 0x00 }, { LP8860_EEPROM_REG_13, 0x00 }, { LP8860_EEPROM_REG_14, 0x00 }, { LP8860_EEPROM_REG_15, 0x00 }, { LP8860_EEPROM_REG_16, 0x00 }, { LP8860_EEPROM_REG_17, 0x00 }, { LP8860_EEPROM_REG_18, 0x00 }, { LP8860_EEPROM_REG_19, 0x00 }, { LP8860_EEPROM_REG_20, 0x00 }, { LP8860_EEPROM_REG_21, 0x00 }, { LP8860_EEPROM_REG_22, 0x00 }, { LP8860_EEPROM_REG_23, 0x00 }, { LP8860_EEPROM_REG_24, 0x00 }, }; static const struct regmap_config lp8860_eeprom_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = LP8860_EEPROM_REG_24, .reg_defaults = lp8860_eeprom_defs, .num_reg_defaults = ARRAY_SIZE(lp8860_eeprom_defs), .cache_type = REGCACHE_NONE, }; static int lp8860_probe(struct i2c_client *client, const struct i2c_device_id *id) { int ret; struct lp8860_led *led; struct device_node *np = client->dev.of_node; struct device_node *child_node; const char *name; led = devm_kzalloc(&client->dev, sizeof(*led), GFP_KERNEL); if (!led) return -ENOMEM; for_each_available_child_of_node(np, child_node) { led->led_dev.default_trigger = of_get_property(child_node, "linux,default-trigger", NULL); ret = of_property_read_string(child_node, "label", &name); if (!ret) snprintf(led->label, sizeof(led->label), "%s:%s", id->name, name); else snprintf(led->label, sizeof(led->label), "%s::display_cluster", id->name); } led->enable_gpio = devm_gpiod_get_optional(&client->dev, "enable", GPIOD_OUT_LOW); if (IS_ERR(led->enable_gpio)) { ret = PTR_ERR(led->enable_gpio); dev_err(&client->dev, "Failed to get enable gpio: %d\n", ret); return ret; } led->regulator = devm_regulator_get(&client->dev, "vled"); if (IS_ERR(led->regulator)) led->regulator = NULL; led->client = client; led->led_dev.name = led->label; led->led_dev.brightness_set_blocking = lp8860_brightness_set; mutex_init(&led->lock); i2c_set_clientdata(client, led); 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; ret = devm_led_classdev_register(&client->dev, &led->led_dev); if (ret) { dev_err(&client->dev, "led register err: %d\n", ret); return ret; } return 0; } static int lp8860_remove(struct i2c_client *client) { struct lp8860_led *led = i2c_get_clientdata(client); int ret; if (led->enable_gpio) gpiod_direction_output(led->enable_gpio, 0); if (led->regulator) { ret = regulator_disable(led->regulator); if (ret) dev_err(&led->client->dev, "Failed to disable regulator\n"); } mutex_destroy(&led->lock); return 0; } static const struct i2c_device_id lp8860_id[] = { { "lp8860", 0 }, { } }; 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, .remove = lp8860_remove, .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");
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