| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Daniel Jeong | 1612 | 91.28% | 1 | 7.14% |
| Johan Hovold | 56 | 3.17% | 1 | 7.14% |
| Andrew Lunn | 40 | 2.27% | 1 | 7.14% |
| Pavel Machek | 21 | 1.19% | 1 | 7.14% |
| Kim (Woogyom) Milo | 16 | 0.91% | 1 | 7.14% |
| Jingoo Han | 6 | 0.34% | 2 | 14.29% |
| Axel Lin | 5 | 0.28% | 2 | 14.29% |
| Dwaipayan Ray | 4 | 0.23% | 1 | 7.14% |
| Thomas Gleixner | 2 | 0.11% | 1 | 7.14% |
| Zheng Yongjun | 2 | 0.11% | 1 | 7.14% |
| Uwe Kleine-König | 2 | 0.11% | 2 | 14.29% |
| Total | 1766 | 14 |
// SPDX-License-Identifier: GPL-2.0-only /* * Simple driver for Texas Instruments LM3642 LED Flash driver chip * Copyright (C) 2012 Texas Instruments */ #include <linux/module.h> #include <linux/delay.h> #include <linux/i2c.h> #include <linux/leds.h> #include <linux/slab.h> #include <linux/platform_device.h> #include <linux/fs.h> #include <linux/regmap.h> #include <linux/platform_data/leds-lm3642.h> #define REG_FILT_TIME (0x0) #define REG_IVFM_MODE (0x1) #define REG_TORCH_TIME (0x6) #define REG_FLASH (0x8) #define REG_I_CTRL (0x9) #define REG_ENABLE (0xA) #define REG_FLAG (0xB) #define REG_MAX (0xB) #define UVLO_EN_SHIFT (7) #define IVM_D_TH_SHIFT (2) #define TORCH_RAMP_UP_TIME_SHIFT (3) #define TORCH_RAMP_DN_TIME_SHIFT (0) #define INDUCTOR_I_LIMIT_SHIFT (6) #define FLASH_RAMP_TIME_SHIFT (3) #define FLASH_TOUT_TIME_SHIFT (0) #define TORCH_I_SHIFT (4) #define FLASH_I_SHIFT (0) #define IVFM_SHIFT (7) #define TX_PIN_EN_SHIFT (6) #define STROBE_PIN_EN_SHIFT (5) #define TORCH_PIN_EN_SHIFT (4) #define MODE_BITS_SHIFT (0) #define UVLO_EN_MASK (0x1) #define IVM_D_TH_MASK (0x7) #define TORCH_RAMP_UP_TIME_MASK (0x7) #define TORCH_RAMP_DN_TIME_MASK (0x7) #define INDUCTOR_I_LIMIT_MASK (0x1) #define FLASH_RAMP_TIME_MASK (0x7) #define FLASH_TOUT_TIME_MASK (0x7) #define TORCH_I_MASK (0x7) #define FLASH_I_MASK (0xF) #define IVFM_MASK (0x1) #define TX_PIN_EN_MASK (0x1) #define STROBE_PIN_EN_MASK (0x1) #define TORCH_PIN_EN_MASK (0x1) #define MODE_BITS_MASK (0x73) #define EX_PIN_CONTROL_MASK (0x71) #define EX_PIN_ENABLE_MASK (0x70) enum lm3642_mode { MODES_STASNDBY = 0, MODES_INDIC, MODES_TORCH, MODES_FLASH }; struct lm3642_chip_data { struct device *dev; struct led_classdev cdev_flash; struct led_classdev cdev_torch; struct led_classdev cdev_indicator; u8 br_flash; u8 br_torch; u8 br_indicator; enum lm3642_torch_pin_enable torch_pin; enum lm3642_strobe_pin_enable strobe_pin; enum lm3642_tx_pin_enable tx_pin; struct lm3642_platform_data *pdata; struct regmap *regmap; struct mutex lock; unsigned int last_flag; }; /* chip initialize */ static int lm3642_chip_init(struct lm3642_chip_data *chip) { int ret; struct lm3642_platform_data *pdata = chip->pdata; /* set enable register */ ret = regmap_update_bits(chip->regmap, REG_ENABLE, EX_PIN_ENABLE_MASK, pdata->tx_pin); if (ret < 0) dev_err(chip->dev, "Failed to update REG_ENABLE Register\n"); return ret; } /* chip control */ static int lm3642_control(struct lm3642_chip_data *chip, u8 brightness, enum lm3642_mode opmode) { int ret; ret = regmap_read(chip->regmap, REG_FLAG, &chip->last_flag); if (ret < 0) { dev_err(chip->dev, "Failed to read REG_FLAG Register\n"); return ret; } if (chip->last_flag) dev_info(chip->dev, "Last FLAG is 0x%x\n", chip->last_flag); /* brightness 0 means off-state */ if (!brightness) opmode = MODES_STASNDBY; switch (opmode) { case MODES_TORCH: ret = regmap_update_bits(chip->regmap, REG_I_CTRL, TORCH_I_MASK << TORCH_I_SHIFT, (brightness - 1) << TORCH_I_SHIFT); if (chip->torch_pin) opmode |= (TORCH_PIN_EN_MASK << TORCH_PIN_EN_SHIFT); break; case MODES_FLASH: ret = regmap_update_bits(chip->regmap, REG_I_CTRL, FLASH_I_MASK << FLASH_I_SHIFT, (brightness - 1) << FLASH_I_SHIFT); if (chip->strobe_pin) opmode |= (STROBE_PIN_EN_MASK << STROBE_PIN_EN_SHIFT); break; case MODES_INDIC: ret = regmap_update_bits(chip->regmap, REG_I_CTRL, TORCH_I_MASK << TORCH_I_SHIFT, (brightness - 1) << TORCH_I_SHIFT); break; case MODES_STASNDBY: break; default: return -EINVAL; } if (ret < 0) { dev_err(chip->dev, "Failed to write REG_I_CTRL Register\n"); return ret; } if (chip->tx_pin) opmode |= (TX_PIN_EN_MASK << TX_PIN_EN_SHIFT); ret = regmap_update_bits(chip->regmap, REG_ENABLE, MODE_BITS_MASK << MODE_BITS_SHIFT, opmode << MODE_BITS_SHIFT); return ret; } /* torch */ /* torch pin config for lm3642 */ static ssize_t torch_pin_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { ssize_t ret; struct led_classdev *led_cdev = dev_get_drvdata(dev); struct lm3642_chip_data *chip = container_of(led_cdev, struct lm3642_chip_data, cdev_indicator); unsigned int state; ret = kstrtouint(buf, 10, &state); if (ret) return ret; if (state != 0) state = 0x01 << TORCH_PIN_EN_SHIFT; chip->torch_pin = state; ret = regmap_update_bits(chip->regmap, REG_ENABLE, TORCH_PIN_EN_MASK << TORCH_PIN_EN_SHIFT, state); if (ret < 0) { dev_err(chip->dev, "%s:i2c access fail to register\n", __func__); return ret; } return size; } static DEVICE_ATTR_WO(torch_pin); static int lm3642_torch_brightness_set(struct led_classdev *cdev, enum led_brightness brightness) { struct lm3642_chip_data *chip = container_of(cdev, struct lm3642_chip_data, cdev_torch); int ret; mutex_lock(&chip->lock); chip->br_torch = brightness; ret = lm3642_control(chip, chip->br_torch, MODES_TORCH); mutex_unlock(&chip->lock); return ret; } /* flash */ /* strobe pin config for lm3642*/ static ssize_t strobe_pin_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { ssize_t ret; struct led_classdev *led_cdev = dev_get_drvdata(dev); struct lm3642_chip_data *chip = container_of(led_cdev, struct lm3642_chip_data, cdev_indicator); unsigned int state; ret = kstrtouint(buf, 10, &state); if (ret) return ret; if (state != 0) state = 0x01 << STROBE_PIN_EN_SHIFT; chip->strobe_pin = state; ret = regmap_update_bits(chip->regmap, REG_ENABLE, STROBE_PIN_EN_MASK << STROBE_PIN_EN_SHIFT, state); if (ret < 0) { dev_err(chip->dev, "%s:i2c access fail to register\n", __func__); return ret; } return size; } static DEVICE_ATTR_WO(strobe_pin); static int lm3642_strobe_brightness_set(struct led_classdev *cdev, enum led_brightness brightness) { struct lm3642_chip_data *chip = container_of(cdev, struct lm3642_chip_data, cdev_flash); int ret; mutex_lock(&chip->lock); chip->br_flash = brightness; ret = lm3642_control(chip, chip->br_flash, MODES_FLASH); mutex_unlock(&chip->lock); return ret; } /* indicator */ static int lm3642_indicator_brightness_set(struct led_classdev *cdev, enum led_brightness brightness) { struct lm3642_chip_data *chip = container_of(cdev, struct lm3642_chip_data, cdev_indicator); int ret; mutex_lock(&chip->lock); chip->br_indicator = brightness; ret = lm3642_control(chip, chip->br_indicator, MODES_INDIC); mutex_unlock(&chip->lock); return ret; } static const struct regmap_config lm3642_regmap = { .reg_bits = 8, .val_bits = 8, .max_register = REG_MAX, }; static struct attribute *lm3642_flash_attrs[] = { &dev_attr_strobe_pin.attr, NULL }; ATTRIBUTE_GROUPS(lm3642_flash); static struct attribute *lm3642_torch_attrs[] = { &dev_attr_torch_pin.attr, NULL }; ATTRIBUTE_GROUPS(lm3642_torch); static int lm3642_probe(struct i2c_client *client) { struct lm3642_platform_data *pdata = dev_get_platdata(&client->dev); struct lm3642_chip_data *chip; int err; if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { dev_err(&client->dev, "i2c functionality check fail.\n"); return -EOPNOTSUPP; } if (pdata == NULL) { dev_err(&client->dev, "needs Platform Data.\n"); return -ENODATA; } chip = devm_kzalloc(&client->dev, sizeof(struct lm3642_chip_data), GFP_KERNEL); if (!chip) return -ENOMEM; chip->dev = &client->dev; chip->pdata = pdata; chip->tx_pin = pdata->tx_pin; chip->torch_pin = pdata->torch_pin; chip->strobe_pin = pdata->strobe_pin; chip->regmap = devm_regmap_init_i2c(client, &lm3642_regmap); if (IS_ERR(chip->regmap)) { err = PTR_ERR(chip->regmap); dev_err(&client->dev, "Failed to allocate register map: %d\n", err); return err; } mutex_init(&chip->lock); i2c_set_clientdata(client, chip); err = lm3642_chip_init(chip); if (err < 0) goto err_out; /* flash */ chip->cdev_flash.name = "flash"; chip->cdev_flash.max_brightness = 16; chip->cdev_flash.brightness_set_blocking = lm3642_strobe_brightness_set; chip->cdev_flash.default_trigger = "flash"; chip->cdev_flash.groups = lm3642_flash_groups; err = led_classdev_register(&client->dev, &chip->cdev_flash); if (err < 0) { dev_err(chip->dev, "failed to register flash\n"); goto err_out; } /* torch */ chip->cdev_torch.name = "torch"; chip->cdev_torch.max_brightness = 8; chip->cdev_torch.brightness_set_blocking = lm3642_torch_brightness_set; chip->cdev_torch.default_trigger = "torch"; chip->cdev_torch.groups = lm3642_torch_groups; err = led_classdev_register(&client->dev, &chip->cdev_torch); if (err < 0) { dev_err(chip->dev, "failed to register torch\n"); goto err_create_torch_file; } /* indicator */ chip->cdev_indicator.name = "indicator"; chip->cdev_indicator.max_brightness = 8; chip->cdev_indicator.brightness_set_blocking = lm3642_indicator_brightness_set; err = led_classdev_register(&client->dev, &chip->cdev_indicator); if (err < 0) { dev_err(chip->dev, "failed to register indicator\n"); goto err_create_indicator_file; } dev_info(&client->dev, "LM3642 is initialized\n"); return 0; err_create_indicator_file: led_classdev_unregister(&chip->cdev_torch); err_create_torch_file: led_classdev_unregister(&chip->cdev_flash); err_out: return err; } static void lm3642_remove(struct i2c_client *client) { struct lm3642_chip_data *chip = i2c_get_clientdata(client); led_classdev_unregister(&chip->cdev_indicator); led_classdev_unregister(&chip->cdev_torch); led_classdev_unregister(&chip->cdev_flash); regmap_write(chip->regmap, REG_ENABLE, 0); } static const struct i2c_device_id lm3642_id[] = { {LM3642_NAME, 0}, {} }; MODULE_DEVICE_TABLE(i2c, lm3642_id); static struct i2c_driver lm3642_i2c_driver = { .driver = { .name = LM3642_NAME, .pm = NULL, }, .probe_new = lm3642_probe, .remove = lm3642_remove, .id_table = lm3642_id, }; module_i2c_driver(lm3642_i2c_driver); MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM3642"); MODULE_AUTHOR("Daniel Jeong <daniel.jeong@ti.com>"); MODULE_AUTHOR("G.Shark Jeong <gshark.jeong@gmail.com>"); MODULE_LICENSE("GPL v2");
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