Other 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！
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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）
/*
* 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_HERE dev_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;
else
reg_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;
#endif
dev_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！
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/