aw21024驱动与资料.rar

/* * leds-aw21024.c aw21024 led module * * Version: v1.0.0 * * Copyright (c) 2020 AWINIC Technology CO., LTD * * Author: Joseph <jiahuanqing@awinic.com.cn> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/i2c.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/firmware.h> #include <linux/slab.h> #include <linux/version.h> #include <linux/input.h> #include <linux/debugfs.h> #include <linux/miscdevice.h> #include <linux/syscalls.h> #include <asm/uaccess.h> #include <linux/of_gpio.h> #include <linux/leds.h> #include <linux/leds-aw21024.h> #include <linux/leds-aw21024-reg.h> /****************************************************** * * Marco * ******************************************************/ #define AW21024_I2C_NAME "aw21024_led" #define AW21024_VERSION "v1.0.0" #define AW_I2C_RETRIES 2 #define AW_I2C_RETRY_DELAY 1 #define AW_READ_CHIPID_RETRIES 2 #define AW_READ_CHIPID_RETRY_DELAY 1 /****************************************************** * * led effect * ******************************************************/ #define AW21024_CFG_NAME_MAX 64 AW21024_CFG aw21024_cfg_array[] = { {aw21024_cfg_led_off, sizeof(aw21024_cfg_led_off)} , {aw21024_all_leds_on, sizeof(aw21024_all_leds_on)} , {aw21024_red_leds_on, sizeof(aw21024_red_leds_on)} , {aw21024_green_leds_on, sizeof(aw21024_green_leds_on)} , {aw21024_blue_leds_on, sizeof(aw21024_blue_leds_on)} , {aw21024_breath_leds_on, sizeof(aw21024_breath_leds_on)} }; /****************************************************** * * aw21024 i2c write/read * ******************************************************/ static int aw21024_i2c_write(struct aw21024 *aw21024, unsigned char reg_addr, unsigned char reg_data) { int ret = -1; unsigned char cnt = 0; while (cnt < AW_I2C_RETRIES) { ret = i2c_smbus_write_byte_data(aw21024->i2c, reg_addr, reg_data); if (ret < 0) { pr_err("%s: i2c_write cnt=%d error=%d\n", __func__, cnt, ret); } else { break; } cnt++; msleep(AW_I2C_RETRY_DELAY); } return ret; } static int aw21024_i2c_read(struct aw21024 *aw21024, unsigned char reg_addr, unsigned char *reg_data) { int ret = -1; unsigned char cnt = 0; while (cnt < AW_I2C_RETRIES) { ret = i2c_smbus_read_byte_data(aw21024->i2c, reg_addr); if (ret < 0) { pr_err("%s: i2c_read cnt=%d error=%d\n", __func__, cnt, ret); } else { *reg_data = ret; break; } cnt++; msleep(AW_I2C_RETRY_DELAY); } return ret; } static int aw21024_i2c_write_bits(struct aw21024 *aw21024, unsigned char reg_addr, unsigned int mask, unsigned char reg_data) { unsigned char reg_val = 0; pr_info("%s: enter\n", __func__); aw21024_i2c_read(aw21024, reg_addr, &reg_val); reg_val &= mask; reg_val |= reg_data; aw21024_i2c_write(aw21024, reg_addr, reg_val); return 0; } /***************************************************** * * aw21024 led array cfg * *****************************************************/ static void aw21024_update_cfg_array(struct aw21024 *aw21024, unsigned char *p_cfg_data, unsigned int cfg_size) { unsigned int i = 0; pr_info("%s: enter\n", __func__); for (i = 0; i < cfg_size; i += 2) aw21024_i2c_write(aw21024, p_cfg_data[i], p_cfg_data[i + 1]); } static int aw21024_cfg_update_array(struct aw21024 *aw21024) { pr_info("%s: enter\n", __func__); aw21024_update_cfg_array(aw21024, aw21024_cfg_array[aw21024->effect].p, aw21024_cfg_array[aw21024->effect].count); return 0; } static int aw21024_hw_reset(struct aw21024 *aw21024) { pr_info("%s: enter\n", __func__); if (aw21024 && gpio_is_valid(aw21024->reset_gpio)) { gpio_set_value_cansleep(aw21024->reset_gpio, 0); msleep(1); gpio_set_value_cansleep(aw21024->reset_gpio, 1); usleep_range(2000, 2500); } else { dev_err(aw21024->dev, "%s: failed\n", __func__); } pr_info("%s: enter out\n", __func__); return 0; } static int aw21024_hw_off(struct aw21024 *aw21024) { pr_info("%s: enter\n", __func__); if (aw21024 && gpio_is_valid(aw21024->reset_gpio)) { gpio_set_value_cansleep(aw21024->reset_gpio, 0); msleep(1); } else { dev_err(aw21024->dev, "%s: failed\n", __func__); } return 0; } /***************************************************** * * aw21024 led function * *****************************************************/ static int aw21024_chip_enable(struct aw21024 *aw21024, bool flag) { pr_info("%s: enter\n", __func__); if (flag) { aw21024_i2c_write_bits(aw21024, AW21024_REG_GCR, AW21024_BIT_CHIP_EN_CLOSE_MASK, AW21024_BIT_CHIP_EN); } else { aw21024_i2c_write_bits(aw21024, AW21024_REG_GCR, AW21024_BIT_CHIP_EN_CLOSE_MASK, AW21024_BIT_CHIP_CLOSE); } return 0; } static int aw21024_clkfrq_set(struct aw21024 *aw21024, unsigned int mode) { pr_info("%s: enter\n", __func__); switch (mode) { case AW21024_CLKPRQ_16MH: aw21024_i2c_write_bits(aw21024, AW21024_REG_GCR, AW21024_BIT_CLKPRQ_MASK, AW21024_BIT_CLKPRQ_16MH); break; case AW21024_CLKPRQ_8MH: aw21024_i2c_write_bits(aw21024, AW21024_REG_GCR, AW21024_BIT_CLKPRQ_MASK, AW21024_BIT_CLKPRQ_8MH); break; case AW21024_CLKPRQ_1MH: aw21024_i2c_write_bits(aw21024, AW21024_REG_GCR, AW21024_BIT_CLKPRQ_MASK, AW21024_BIT_CLKPRQ_1MH); break; case AW21024_CLKPRQ_512KH: aw21024_i2c_write_bits(aw21024, AW21024_REG_GCR, AW21024_BIT_CLKPRQ_MASK, AW21024_BIT_CLKPRQ_512KH); break; case AW21024_CLKPRQ_256KH: aw21024_i2c_write_bits(aw21024, AW21024_REG_GCR, AW21024_BIT_CLKPRQ_MASK, AW21024_BIT_CLKPRQ_256KH); break; case AW21024_CLKPRQ_125KH: aw21024_i2c_write_bits(aw21024, AW21024_REG_GCR, AW21024_BIT_CLKPRQ_MASK, AW21024_BIT_CLKPRQ_125KH); break; case AW21024_CLKPRQ_62KH: aw21024_i2c_write_bits(aw21024, AW21024_REG_GCR, AW21024_BIT_CLKPRQ_MASK, AW21024_BIT_CLKPRQ_62KH); break; case AW21024_CLKPRQ_31KH: aw21024_i2c_write_bits(aw21024, AW21024_REG_GCR, AW21024_BIT_CLKPRQ_MASK, AW21024_BIT_CLKPRQ_31KH); break; default: break; } return 0; } static int aw21024_br_update(struct aw21024 *aw21024) { aw21024_i2c_write(aw21024, AW21024_REG_UPDATE, 0x00); return 0; } static int aw21024_sw_reset(struct aw21024 *aw21024) { aw21024_i2c_write(aw21024, AW21024_REG_RESET, 0x00); return 0; } /***************************************************** * * aw21024 led brightness * *****************************************************/ static void aw21024_brightness_work(struct work_struct *work) { struct aw21024 *aw21024 = container_of(work, struct aw21024, brightness_work); pr_info("%s: enter\n", __func__); if (aw21024->cdev.brightness > aw21024->cdev.max_brightness) aw21024->cdev.brightness = aw21024->cdev.max_brightness; aw21024_i2c_write(aw21024, AW21024_REG_GCCR, aw21024->cdev.brightness); } static void aw21024_set_brightness(struct led_classdev *cdev, enum led_brightness brightness) { struct aw21024 *aw21024 = container_of(cdev, struct aw21024, cdev); aw21024->cdev.brightness = brightness; schedule_work(&aw21024->brightness_work); } /***************************************************** * * check chip id * *****************************************************/ static int aw21024_read_chipid(struct aw21024 *aw21024) { int ret = -1; unsigned char cnt = 0; unsigned char reg_val = 0; pr_info("%s: enter\n", __func__); while (cnt < AW_READ_CHIPID_RETRIES) { ret = aw21024_i2c_read(aw2