// SPDX-License-Identifier: GPL-2.0-only /* * drivers/leds/leds-as3645a.c - AS3645A and LM3555 flash controllers driver * * Copyright (C) 2008-2011 Nokia Corporation * Copyright (c) 2011, 2017 Intel Corporation. * * Based on drivers/media/i2c/as3645a.c. * * Contact: Sakari Ailus <[email protected]> */ #include <linux/delay.h> #include <linux/gpio/consumer.h> #include <linux/i2c.h> #include <linux/led-class-flash.h> #include <linux/leds.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/property.h> #include <linux/slab.h> #include <media/v4l2-flash-led-class.h> #define AS_TIMER_US_TO_CODE(t) … #define AS_TIMER_CODE_TO_US(c) … /* Register definitions */ /* Read-only Design info register: Reset state: xxxx 0001 */ #define AS_DESIGN_INFO_REG … #define AS_DESIGN_INFO_FACTORY(x) … #define AS_DESIGN_INFO_MODEL(x) … /* Read-only Version control register: Reset state: 0000 0000 * for first engineering samples */ #define AS_VERSION_CONTROL_REG … #define AS_VERSION_CONTROL_RFU(x) … #define AS_VERSION_CONTROL_VERSION(x) … /* Read / Write (Indicator and timer register): Reset state: 0000 1111 */ #define AS_INDICATOR_AND_TIMER_REG … #define AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT … #define AS_INDICATOR_AND_TIMER_VREF_SHIFT … #define AS_INDICATOR_AND_TIMER_INDICATOR_SHIFT … /* Read / Write (Current set register): Reset state: 0110 1001 */ #define AS_CURRENT_SET_REG … #define AS_CURRENT_ASSIST_LIGHT_SHIFT … #define AS_CURRENT_LED_DET_ON … #define AS_CURRENT_FLASH_CURRENT_SHIFT … /* Read / Write (Control register): Reset state: 1011 0100 */ #define AS_CONTROL_REG … #define AS_CONTROL_MODE_SETTING_SHIFT … #define AS_CONTROL_STROBE_ON … #define AS_CONTROL_OUT_ON … #define AS_CONTROL_EXT_TORCH_ON … #define AS_CONTROL_STROBE_TYPE_EDGE … #define AS_CONTROL_STROBE_TYPE_LEVEL … #define AS_CONTROL_COIL_PEAK_SHIFT … /* Read only (D3 is read / write) (Fault and info): Reset state: 0000 x000 */ #define AS_FAULT_INFO_REG … #define AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT … #define AS_FAULT_INFO_INDICATOR_LED … #define AS_FAULT_INFO_LED_AMOUNT … #define AS_FAULT_INFO_TIMEOUT … #define AS_FAULT_INFO_OVER_TEMPERATURE … #define AS_FAULT_INFO_SHORT_CIRCUIT … #define AS_FAULT_INFO_OVER_VOLTAGE … /* Boost register */ #define AS_BOOST_REG … #define AS_BOOST_CURRENT_DISABLE … #define AS_BOOST_CURRENT_ENABLE … /* Password register is used to unlock boost register writing */ #define AS_PASSWORD_REG … #define AS_PASSWORD_UNLOCK_VALUE … #define AS_NAME … #define AS_I2C_ADDR … #define AS_FLASH_TIMEOUT_MIN … #define AS_FLASH_TIMEOUT_MAX … #define AS_FLASH_TIMEOUT_STEP … #define AS_FLASH_INTENSITY_MIN … #define AS_FLASH_INTENSITY_MAX_1LED … #define AS_FLASH_INTENSITY_MAX_2LEDS … #define AS_FLASH_INTENSITY_STEP … #define AS_TORCH_INTENSITY_MIN … #define AS_TORCH_INTENSITY_MAX … #define AS_TORCH_INTENSITY_STEP … #define AS_INDICATOR_INTENSITY_MIN … #define AS_INDICATOR_INTENSITY_MAX … #define AS_INDICATOR_INTENSITY_STEP … #define AS_PEAK_mA_MAX … #define AS_PEAK_mA_TO_REG(a) … /* LED numbers for Devicetree */ #define AS_LED_FLASH … #define AS_LED_INDICATOR … enum as_mode { … }; struct as3645a_config { … }; struct as3645a { … }; #define fled_to_as3645a(__fled) … #define iled_cdev_to_as3645a(__iled_cdev) … /* Return negative errno else zero on success */ static int as3645a_write(struct as3645a *flash, u8 addr, u8 val) { … } /* Return negative errno else a data byte received from the device. */ static int as3645a_read(struct as3645a *flash, u8 addr) { … } /* ----------------------------------------------------------------------------- * Hardware configuration and trigger */ /** * as3645a_set_current - Set flash configuration registers * @flash: The flash * * Configure the hardware with flash, assist and indicator currents, as well as * flash timeout. * * Return 0 on success, or a negative error code if an I2C communication error * occurred. */ static int as3645a_set_current(struct as3645a *flash) { … } static int as3645a_set_timeout(struct as3645a *flash) { … } /** * as3645a_set_control - Set flash control register * @flash: The flash * @mode: Desired output mode * @on: Desired output state * * Configure the hardware with output mode and state. * * Return 0 on success, or a negative error code if an I2C communication error * occurred. */ static int as3645a_set_control(struct as3645a *flash, enum as_mode mode, bool on) { … } static int as3645a_get_fault(struct led_classdev_flash *fled, u32 *fault) { … } static unsigned int __as3645a_current_to_reg(unsigned int min, unsigned int max, unsigned int step, unsigned int val) { … } static unsigned int as3645a_current_to_reg(struct as3645a *flash, bool is_flash, unsigned int ua) { … } static int as3645a_set_indicator_brightness(struct led_classdev *iled_cdev, enum led_brightness brightness) { … } static int as3645a_set_assist_brightness(struct led_classdev *fled_cdev, enum led_brightness brightness) { … } static int as3645a_set_flash_brightness(struct led_classdev_flash *fled, u32 brightness_ua) { … } static int as3645a_set_flash_timeout(struct led_classdev_flash *fled, u32 timeout_us) { … } static int as3645a_set_strobe(struct led_classdev_flash *fled, bool state) { … } static const struct led_flash_ops as3645a_led_flash_ops = …; static int as3645a_setup(struct as3645a *flash) { … } static int as3645a_detect(struct as3645a *flash) { … } static int as3645a_parse_node(struct device *dev, struct as3645a *flash) { … } static int as3645a_led_class_setup(struct as3645a *flash) { … } static int as3645a_v4l2_setup(struct as3645a *flash) { … } static int as3645a_probe(struct i2c_client *client) { … } static void as3645a_remove(struct i2c_client *client) { … } static const struct i2c_device_id as3645a_id_table[] = …; MODULE_DEVICE_TABLE(i2c, as3645a_id_table); static const struct of_device_id as3645a_of_table[] = …; MODULE_DEVICE_TABLE(of, as3645a_of_table); static struct i2c_driver as3645a_i2c_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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