TI中文支持网Part Number:LM3550Other Parts Discussed in Thread:LM3554,
当前平台是高通xr2平台，目前没有这颗驱动ic的驱动code，网上查阅到这颗ic的datasheet只有5组，但我们只需要其中一个充电功能即可，即往0x10里写0x3A；
那么请问如何实现这颗ic与xr2平台的通信，目前看下来总线已经注册上了，但是不知道该如何把设备挂载到这条总线上，请问有驱动code吗
谢谢！
Johnsin Tao：
HI
没有的。
TI如果有提供，一般都是在芯片官网上给出的，如果没有，我们也是没有的（我们的所有资料也都是来自官网）
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yu xia：
高通平台原生有lm355x的驱动（看代码注释是给lm3554/3556用的），请问lm3550能用吗
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Johnsin Tao：
Hi
应该可以参考，但是不能完全套用。
,
yu xia：
/* * Simple driver for Texas Instruments lm3550 LED Flash driver chip * Copyright (C) 2012 Texas Instruments * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */#include <linux/module.h> #include <linux/delay.h> #include <linux/i2c.h> #include <linux/gpio.h> #include <linux/leds.h> #include <linux/slab.h> #include <linux/platform_device.h> #include <linux/fs.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> #include <linux/platform_data/leds-lm3550.h>#define DEV_LOGE(fmt, args...)dev_err(&client->dev, " %s : "fmt, __FUNCTION__, ##args) #define DEV_LOGI(fmt, args...)_dev_info(&client->dev, " %s : "fmt, __FUNCTION__, ##args) #define DEV_LOGD(fmt, args...)dev_notice(&client->dev, " %s : "fmt, __FUNCTION__, ##args) #define DEV_HEREdev_notice(&client->dev, " %s @ %d", __FUNCTION__, __LINE__) #define UNUSED(x) ( (void)(x) )enum lm3550_type {CHIP_LM3550 = 0, };enum lm3550_regs {REG_FLAG = 0,REG_TORCH_CFG,REG_TORCH_CTRL,REG_STROBE_CFG,REG_FLASH_CTRL,REG_OPMODE,REG_MAX, };/* operation mode */ enum lm3550_mode {MODE_SHDN = 0,MODE_FLASH };/* register map info. */ struct lm3550_reg_data {u8 regno;u8 mask;u8 shift; };struct lm3550_chip_data {struct device *dev;enum lm3550_type type;struct regulator *irled_supply;struct led_classdev cdev_flash;struct lm3550_platform_data *pdata;struct regmap *regmap;struct mutex lock;unsigned int last_flag;struct lm3550_reg_data *regs; };#define INDIC_PATTERN_SIZE 4/*XIAYU ADD*/ static struct lm3550_reg_data lm3550_regs[REG_MAX] = {[REG_FLAG] = {0xD0, 0xBF, 0},[REG_TORCH_CFG] = {0xE0, 0x80, 7},[REG_TORCH_CTRL] = {0xA0, 0x38, 3},[REG_STROBE_CFG] = {0xE0, 0x04, 2},[REG_FLASH_CTRL] = {0xB0, 0x78, 3},[REG_OPMODE] = {0xA0, 0x03, 0}, };static char lm3550_name[][I2C_NAME_SIZE] = {[CHIP_LM3550] = LM3550_NAME, };/* chip initialize */ static int lm3550_chip_init(struct lm3550_chip_data *chip) {int ret;unsigned int reg_val;struct lm3550_platform_data *pdata = chip->pdata;/* input and output pins configuration */switch (chip->type) {case CHIP_LM3550:reg_val = (u32)pdata->pin_tx2 | (u32)pdata->ntc_pin;ret = regmap_update_bits(chip->regmap, 0x10, 0x3A, reg_val);if (ret < 0)goto out;reg_val = (u32)pdata->pass_mode;ret = regmap_update_bits(chip->regmap, 0x10, 0x3A, reg_val);if (ret < 0)goto out;break;default:return -ENODATA;}return ret; out:dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);return ret; } #if 0 /* chip control */ static int lm3550_control(struct lm3550_chip_data *chip,u8 brightness, enum lm3550_mode opmode) {int ret;unsigned int reg_val;struct lm3550_platform_data *pdata = chip->pdata;struct lm3550_reg_data *preg = chip->regs;ret = regmap_read(chip->regmap, preg[REG_FLAG].regno, &chip->last_flag);if (ret < 0)goto out;if (chip->last_flag & preg[REG_FLAG].mask)dev_info(chip->dev, "%s Last FLAG is 0x%x\n",lm3550_name[chip->type],chip->last_flag & preg[REG_FLAG].mask);/* brightness 0 means shutdown */if (!brightness)opmode = MODE_SHDN;switch (opmode) {case MODE_FLASH:ret =regmap_update_bits(chip->regmap, preg[REG_FLASH_CTRL].regno,preg[REG_FLASH_CTRL].mask,(brightness - 1)<< preg[REG_FLASH_CTRL].shift);if (ret < 0)goto out;if (pdata->pin_strobe != lm3550_PIN_STROBE_DISABLE) {if (chip->type == CHIP_LM3550)reg_val = 0x00;elsereg_val = 0x01;ret =regmap_update_bits(chip->regmap,preg[REG_STROBE_CFG].regno,preg[REG_STROBE_CFG].mask,reg_val <<preg[REG_STROBE_CFG].shift);if (ret < 0)goto out;opmode = MODE_SHDN;dev_info(chip->dev,"flash brt is set - ext. strobe pin mode\n");}break;case MODE_SHDN:break;default:return -EINVAL;}/* operation mode control */ret = regmap_update_bits(chip->regmap, preg[REG_OPMODE].regno,preg[REG_OPMODE].mask,opmode << preg[REG_OPMODE].shift);if (ret < 0)goto out;return ret; out:dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);return ret; } #endif #if 0 /* flash */static int lm3550_strobe_brightness_set(struct led_classdev *cdev,enum led_brightness brightness) {struct lm3550_chip_data *chip =container_of(cdev, struct lm3550_chip_data, cdev_flash);int ret;mutex_lock(&chip->lock);ret = lm3550_control(chip, brightness, MODE_FLASH);mutex_unlock(&chip->lock);return ret; }static const struct regmap_config lm3550_regmap = {.reg_bits = 8,.val_bits = 8,.max_register = 0xFF, }; #endif/* module initialize */ static int lm3550_probe(struct i2c_client *client, const struct i2c_device_id *id) {struct lm3550_platform_data *pdata = dev_get_platdata(&client->dev);struct lm3550_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 lm3550_chip_data), GFP_KERNEL);if (!chip)return -ENOMEM;chip->dev = &client->dev;chip->type = id->driver_data;chip->regs = lm3550_regs;chip->pdata = pdata; /*chip->regmap = devm_regmap_init_i2c(client, &lm3550_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);/* lm3550_led int */if (!of_find_property((&client->dev)->of_node, "irled-supply", NULL)){DEV_LOGE("irled-supply failed");}else{chip->irled_supply = devm_regulator_get(&client->dev, "irled");if (IS_ERR(chip->irled_supply)) {DEV_LOGE("devm_regulator_get irled failed");}else{err = regulator_is_enabled(chip->irled_supply);}if(err>0){DEV_LOGD("irled no need enable");}else{DEV_LOGD("irled need enable");regulator_enable(chip->irled_supply);msleep(5);}}err = lm3550_chip_init(chip);if (err < 0)goto err_out; #if 0/* flash */chip->cdev_flash.name = "flash";chip->cdev_flash.max_brightness = 16;chip->cdev_flash.brightness_set_blocking = lm3550_strobe_brightness_set;chip->cdev_flash.default_trigger = "flash";err = led_classdev_register((struct device *) &client->dev, &chip->cdev_flash);if (err < 0)goto err_out; #endifdev_info(&client->dev, "%s is initialized\n", lm3550_name[id->driver_data]);return 0;err_out:return err; }static int lm3550_remove(struct i2c_client *client) {struct lm3550_chip_data *chip = i2c_get_clientdata(client);struct lm3550_reg_data *preg = chip->regs;regmap_write(chip->regmap, preg[REG_OPMODE].regno, 0);led_classdev_unregister(&chip->cdev_flash);dev_info(&client->dev, "%s is removed\n", lm3550_name[chip->type]);return 0; }static const struct i2c_device_id lm3550_id[] = {{LM3550_NAME, CHIP_LM3550},{} };MODULE_DEVICE_TABLE(i2c, lm3550_id);static struct of_device_id lm3550_led_dt_match[] = {{ .compatible = "ti,lm3550_led" },{ }, };static struct i2c_driver lm3550_i2c_driver = {.driver = {.name = LM3550_NAME,.pm = NULL,.of_match_table = of_match_ptr(lm3550_led_dt_match),},.probe = lm3550_probe,.remove = lm3550_remove,.id_table = lm3550_id,};module_i2c_driver(lm3550_i2c_driver);MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for lm3550"); MODULE_AUTHOR("Daniel Jeong <daniel.jeong@ti.com>"); MODULE_AUTHOR("G.Shark Jeong <gshark.jeong@gmail.com>"); MODULE_LICENSE("GPL v2");这个是我写的code，帮忙在这个基础上改下，我们只需要充电功能，0x10里写0x3A；然后给这颗ic上电，让他保证与cpu的通信即可，谢谢！
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Johnsin Tao：
Hｉ
程序这一块，ＴI没有给出文档说明或者参考，所以我这边也没法确认，建议你在美国Ｅ２Ｅ上问一下，他们或能提供帮助：https://e2e.ti.com/
