| // 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 <sakari.ailus@iki.fi> |
| */ |
| |
| #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) (((t) / 1000 - 100) / 50) |
| #define AS_TIMER_CODE_TO_US(c) ((50 * (c) + 100) * 1000) |
| |
| /* Register definitions */ |
| |
| /* Read-only Design info register: Reset state: xxxx 0001 */ |
| #define AS_DESIGN_INFO_REG 0x00 |
| #define AS_DESIGN_INFO_FACTORY(x) (((x) >> 4)) |
| #define AS_DESIGN_INFO_MODEL(x) ((x) & 0x0f) |
| |
| /* Read-only Version control register: Reset state: 0000 0000 |
| * for first engineering samples |
| */ |
| #define AS_VERSION_CONTROL_REG 0x01 |
| #define AS_VERSION_CONTROL_RFU(x) (((x) >> 4)) |
| #define AS_VERSION_CONTROL_VERSION(x) ((x) & 0x0f) |
| |
| /* Read / Write (Indicator and timer register): Reset state: 0000 1111 */ |
| #define AS_INDICATOR_AND_TIMER_REG 0x02 |
| #define AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT 0 |
| #define AS_INDICATOR_AND_TIMER_VREF_SHIFT 4 |
| #define AS_INDICATOR_AND_TIMER_INDICATOR_SHIFT 6 |
| |
| /* Read / Write (Current set register): Reset state: 0110 1001 */ |
| #define AS_CURRENT_SET_REG 0x03 |
| #define AS_CURRENT_ASSIST_LIGHT_SHIFT 0 |
| #define AS_CURRENT_LED_DET_ON (1 << 3) |
| #define AS_CURRENT_FLASH_CURRENT_SHIFT 4 |
| |
| /* Read / Write (Control register): Reset state: 1011 0100 */ |
| #define AS_CONTROL_REG 0x04 |
| #define AS_CONTROL_MODE_SETTING_SHIFT 0 |
| #define AS_CONTROL_STROBE_ON (1 << 2) |
| #define AS_CONTROL_OUT_ON (1 << 3) |
| #define AS_CONTROL_EXT_TORCH_ON (1 << 4) |
| #define AS_CONTROL_STROBE_TYPE_EDGE (0 << 5) |
| #define AS_CONTROL_STROBE_TYPE_LEVEL (1 << 5) |
| #define AS_CONTROL_COIL_PEAK_SHIFT 6 |
| |
| /* Read only (D3 is read / write) (Fault and info): Reset state: 0000 x000 */ |
| #define AS_FAULT_INFO_REG 0x05 |
| #define AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT (1 << 1) |
| #define AS_FAULT_INFO_INDICATOR_LED (1 << 2) |
| #define AS_FAULT_INFO_LED_AMOUNT (1 << 3) |
| #define AS_FAULT_INFO_TIMEOUT (1 << 4) |
| #define AS_FAULT_INFO_OVER_TEMPERATURE (1 << 5) |
| #define AS_FAULT_INFO_SHORT_CIRCUIT (1 << 6) |
| #define AS_FAULT_INFO_OVER_VOLTAGE (1 << 7) |
| |
| /* Boost register */ |
| #define AS_BOOST_REG 0x0d |
| #define AS_BOOST_CURRENT_DISABLE (0 << 0) |
| #define AS_BOOST_CURRENT_ENABLE (1 << 0) |
| |
| /* Password register is used to unlock boost register writing */ |
| #define AS_PASSWORD_REG 0x0f |
| #define AS_PASSWORD_UNLOCK_VALUE 0x55 |
| |
| #define AS_NAME "as3645a" |
| #define AS_I2C_ADDR (0x60 >> 1) /* W:0x60, R:0x61 */ |
| |
| #define AS_FLASH_TIMEOUT_MIN 100000 /* us */ |
| #define AS_FLASH_TIMEOUT_MAX 850000 |
| #define AS_FLASH_TIMEOUT_STEP 50000 |
| |
| #define AS_FLASH_INTENSITY_MIN 200000 /* uA */ |
| #define AS_FLASH_INTENSITY_MAX_1LED 500000 |
| #define AS_FLASH_INTENSITY_MAX_2LEDS 400000 |
| #define AS_FLASH_INTENSITY_STEP 20000 |
| |
| #define AS_TORCH_INTENSITY_MIN 20000 /* uA */ |
| #define AS_TORCH_INTENSITY_MAX 160000 |
| #define AS_TORCH_INTENSITY_STEP 20000 |
| |
| #define AS_INDICATOR_INTENSITY_MIN 0 /* uA */ |
| #define AS_INDICATOR_INTENSITY_MAX 10000 |
| #define AS_INDICATOR_INTENSITY_STEP 2500 |
| |
| #define AS_PEAK_mA_MAX 2000 |
| #define AS_PEAK_mA_TO_REG(a) \ |
| ((min_t(u32, AS_PEAK_mA_MAX, a) - 1250) / 250) |
| |
| /* LED numbers for Devicetree */ |
| #define AS_LED_FLASH 0 |
| #define AS_LED_INDICATOR 1 |
| |
| enum as_mode { |
| AS_MODE_EXT_TORCH = 0 << AS_CONTROL_MODE_SETTING_SHIFT, |
| AS_MODE_INDICATOR = 1 << AS_CONTROL_MODE_SETTING_SHIFT, |
| AS_MODE_ASSIST = 2 << AS_CONTROL_MODE_SETTING_SHIFT, |
| AS_MODE_FLASH = 3 << AS_CONTROL_MODE_SETTING_SHIFT, |
| }; |
| |
| struct as3645a_config { |
| u32 flash_timeout_us; |
| u32 flash_max_ua; |
| u32 assist_max_ua; |
| u32 indicator_max_ua; |
| u32 voltage_reference; |
| u32 peak; |
| }; |
| |
| struct as3645a { |
| struct i2c_client *client; |
| |
| struct mutex mutex; |
| |
| struct led_classdev_flash fled; |
| struct led_classdev iled_cdev; |
| |
| struct v4l2_flash *vf; |
| struct v4l2_flash *vfind; |
| |
| struct fwnode_handle *flash_node; |
| struct fwnode_handle *indicator_node; |
| |
| struct as3645a_config cfg; |
| |
| enum as_mode mode; |
| unsigned int timeout; |
| unsigned int flash_current; |
| unsigned int assist_current; |
| unsigned int indicator_current; |
| enum v4l2_flash_strobe_source strobe_source; |
| }; |
| |
| #define fled_to_as3645a(__fled) container_of(__fled, struct as3645a, fled) |
| #define iled_cdev_to_as3645a(__iled_cdev) \ |
| container_of(__iled_cdev, struct as3645a, iled_cdev) |
| |
| /* Return negative errno else zero on success */ |
| static int as3645a_write(struct as3645a *flash, u8 addr, u8 val) |
| { |
| struct i2c_client *client = flash->client; |
| int rval; |
| |
| rval = i2c_smbus_write_byte_data(client, addr, val); |
| |
| dev_dbg(&client->dev, "Write Addr:%02X Val:%02X %s\n", addr, val, |
| rval < 0 ? "fail" : "ok"); |
| |
| return rval; |
| } |
| |
| /* Return negative errno else a data byte received from the device. */ |
| static int as3645a_read(struct as3645a *flash, u8 addr) |
| { |
| struct i2c_client *client = flash->client; |
| int rval; |
| |
| rval = i2c_smbus_read_byte_data(client, addr); |
| |
| dev_dbg(&client->dev, "Read Addr:%02X Val:%02X %s\n", addr, rval, |
| rval < 0 ? "fail" : "ok"); |
| |
| return rval; |
| } |
| |
| /* ----------------------------------------------------------------------------- |
| * 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) |
| { |
| u8 val; |
| |
| val = (flash->flash_current << AS_CURRENT_FLASH_CURRENT_SHIFT) |
| | (flash->assist_current << AS_CURRENT_ASSIST_LIGHT_SHIFT) |
| | AS_CURRENT_LED_DET_ON; |
| |
| return as3645a_write(flash, AS_CURRENT_SET_REG, val); |
| } |
| |
| static int as3645a_set_timeout(struct as3645a *flash) |
| { |
| u8 val; |
| |
| val = flash->timeout << AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT; |
| |
| val |= (flash->cfg.voltage_reference |
| << AS_INDICATOR_AND_TIMER_VREF_SHIFT) |
| | ((flash->indicator_current ? flash->indicator_current - 1 : 0) |
| << AS_INDICATOR_AND_TIMER_INDICATOR_SHIFT); |
| |
| return as3645a_write(flash, AS_INDICATOR_AND_TIMER_REG, val); |
| } |
| |
| /** |
| * 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) |
| { |
| u8 reg; |
| |
| /* Configure output parameters and operation mode. */ |
| reg = (flash->cfg.peak << AS_CONTROL_COIL_PEAK_SHIFT) |
| | (on ? AS_CONTROL_OUT_ON : 0) |
| | mode; |
| |
| if (mode == AS_MODE_FLASH && |
| flash->strobe_source == V4L2_FLASH_STROBE_SOURCE_EXTERNAL) |
| reg |= AS_CONTROL_STROBE_TYPE_LEVEL |
| | AS_CONTROL_STROBE_ON; |
| |
| return as3645a_write(flash, AS_CONTROL_REG, reg); |
| } |
| |
| static int as3645a_get_fault(struct led_classdev_flash *fled, u32 *fault) |
| { |
| struct as3645a *flash = fled_to_as3645a(fled); |
| int rval; |
| |
| /* NOTE: reading register clears fault status */ |
| rval = as3645a_read(flash, AS_FAULT_INFO_REG); |
| if (rval < 0) |
| return rval; |
| |
| if (rval & AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT) |
| *fault |= LED_FAULT_OVER_CURRENT; |
| |
| if (rval & AS_FAULT_INFO_INDICATOR_LED) |
| *fault |= LED_FAULT_INDICATOR; |
| |
| dev_dbg(&flash->client->dev, "%u connected LEDs\n", |
| rval & AS_FAULT_INFO_LED_AMOUNT ? 2 : 1); |
| |
| if (rval & AS_FAULT_INFO_TIMEOUT) |
| *fault |= LED_FAULT_TIMEOUT; |
| |
| if (rval & AS_FAULT_INFO_OVER_TEMPERATURE) |
| *fault |= LED_FAULT_OVER_TEMPERATURE; |
| |
| if (rval & AS_FAULT_INFO_SHORT_CIRCUIT) |
| *fault |= LED_FAULT_OVER_CURRENT; |
| |
| if (rval & AS_FAULT_INFO_OVER_VOLTAGE) |
| *fault |= LED_FAULT_INPUT_VOLTAGE; |
| |
| return rval; |
| } |
| |
| static unsigned int __as3645a_current_to_reg(unsigned int min, unsigned int max, |
| unsigned int step, |
| unsigned int val) |
| { |
| if (val < min) |
| val = min; |
| |
| if (val > max) |
| val = max; |
| |
| return (val - min) / step; |
| } |
| |
| static unsigned int as3645a_current_to_reg(struct as3645a *flash, bool is_flash, |
| unsigned int ua) |
| { |
| if (is_flash) |
| return __as3645a_current_to_reg(AS_TORCH_INTENSITY_MIN, |
| flash->cfg.assist_max_ua, |
| AS_TORCH_INTENSITY_STEP, ua); |
| else |
| return __as3645a_current_to_reg(AS_FLASH_INTENSITY_MIN, |
| flash->cfg.flash_max_ua, |
| AS_FLASH_INTENSITY_STEP, ua); |
| } |
| |
| static int as3645a_set_indicator_brightness(struct led_classdev *iled_cdev, |
| enum led_brightness brightness) |
| { |
| struct as3645a *flash = iled_cdev_to_as3645a(iled_cdev); |
| int rval; |
| |
| flash->indicator_current = brightness; |
| |
| rval = as3645a_set_timeout(flash); |
| if (rval) |
| return rval; |
| |
| return as3645a_set_control(flash, AS_MODE_INDICATOR, brightness); |
| } |
| |
| static int as3645a_set_assist_brightness(struct led_classdev *fled_cdev, |
| enum led_brightness brightness) |
| { |
| struct led_classdev_flash *fled = lcdev_to_flcdev(fled_cdev); |
| struct as3645a *flash = fled_to_as3645a(fled); |
| int rval; |
| |
| if (brightness) { |
| /* Register value 0 is 20 mA. */ |
| flash->assist_current = brightness - 1; |
| |
| rval = as3645a_set_current(flash); |
| if (rval) |
| return rval; |
| } |
| |
| return as3645a_set_control(flash, AS_MODE_ASSIST, brightness); |
| } |
| |
| static int as3645a_set_flash_brightness(struct led_classdev_flash *fled, |
| u32 brightness_ua) |
| { |
| struct as3645a *flash = fled_to_as3645a(fled); |
| |
| flash->flash_current = as3645a_current_to_reg(flash, true, |
| brightness_ua); |
| |
| return as3645a_set_current(flash); |
| } |
| |
| static int as3645a_set_flash_timeout(struct led_classdev_flash *fled, |
| u32 timeout_us) |
| { |
| struct as3645a *flash = fled_to_as3645a(fled); |
| |
| flash->timeout = AS_TIMER_US_TO_CODE(timeout_us); |
| |
| return as3645a_set_timeout(flash); |
| } |
| |
| static int as3645a_set_strobe(struct led_classdev_flash *fled, bool state) |
| { |
| struct as3645a *flash = fled_to_as3645a(fled); |
| |
| return as3645a_set_control(flash, AS_MODE_FLASH, state); |
| } |
| |
| static const struct led_flash_ops as3645a_led_flash_ops = { |
| .flash_brightness_set = as3645a_set_flash_brightness, |
| .timeout_set = as3645a_set_flash_timeout, |
| .strobe_set = as3645a_set_strobe, |
| .fault_get = as3645a_get_fault, |
| }; |
| |
| static int as3645a_setup(struct as3645a *flash) |
| { |
| struct device *dev = &flash->client->dev; |
| u32 fault = 0; |
| int rval; |
| |
| /* clear errors */ |
| rval = as3645a_read(flash, AS_FAULT_INFO_REG); |
| if (rval < 0) |
| return rval; |
| |
| dev_dbg(dev, "Fault info: %02x\n", rval); |
| |
| rval = as3645a_set_current(flash); |
| if (rval < 0) |
| return rval; |
| |
| rval = as3645a_set_timeout(flash); |
| if (rval < 0) |
| return rval; |
| |
| rval = as3645a_set_control(flash, AS_MODE_INDICATOR, false); |
| if (rval < 0) |
| return rval; |
| |
| /* read status */ |
| rval = as3645a_get_fault(&flash->fled, &fault); |
| if (rval < 0) |
| return rval; |
| |
| dev_dbg(dev, "AS_INDICATOR_AND_TIMER_REG: %02x\n", |
| as3645a_read(flash, AS_INDICATOR_AND_TIMER_REG)); |
| dev_dbg(dev, "AS_CURRENT_SET_REG: %02x\n", |
| as3645a_read(flash, AS_CURRENT_SET_REG)); |
| dev_dbg(dev, "AS_CONTROL_REG: %02x\n", |
| as3645a_read(flash, AS_CONTROL_REG)); |
| |
| return rval & ~AS_FAULT_INFO_LED_AMOUNT ? -EIO : 0; |
| } |
| |
| static int as3645a_detect(struct as3645a *flash) |
| { |
| struct device *dev = &flash->client->dev; |
| int rval, man, model, rfu, version; |
| const char *vendor; |
| |
| rval = as3645a_read(flash, AS_DESIGN_INFO_REG); |
| if (rval < 0) { |
| dev_err(dev, "can't read design info reg\n"); |
| return rval; |
| } |
| |
| man = AS_DESIGN_INFO_FACTORY(rval); |
| model = AS_DESIGN_INFO_MODEL(rval); |
| |
| rval = as3645a_read(flash, AS_VERSION_CONTROL_REG); |
| if (rval < 0) { |
| dev_err(dev, "can't read version control reg\n"); |
| return rval; |
| } |
| |
| rfu = AS_VERSION_CONTROL_RFU(rval); |
| version = AS_VERSION_CONTROL_VERSION(rval); |
| |
| /* Verify the chip model and version. */ |
| if (model != 0x01 || rfu != 0x00) { |
| dev_err(dev, "AS3645A not detected (model %d rfu %d)\n", |
| model, rfu); |
| return -ENODEV; |
| } |
| |
| switch (man) { |
| case 1: |
| vendor = "AMS, Austria Micro Systems"; |
| break; |
| case 2: |
| vendor = "ADI, Analog Devices Inc."; |
| break; |
| case 3: |
| vendor = "NSC, National Semiconductor"; |
| break; |
| case 4: |
| vendor = "NXP"; |
| break; |
| case 5: |
| vendor = "TI, Texas Instrument"; |
| break; |
| default: |
| vendor = "Unknown"; |
| } |
| |
| dev_info(dev, "Chip vendor: %s (%d) Version: %d\n", vendor, |
| man, version); |
| |
| rval = as3645a_write(flash, AS_PASSWORD_REG, AS_PASSWORD_UNLOCK_VALUE); |
| if (rval < 0) |
| return rval; |
| |
| return as3645a_write(flash, AS_BOOST_REG, AS_BOOST_CURRENT_DISABLE); |
| } |
| |
| static int as3645a_parse_node(struct device *dev, struct as3645a *flash) |
| { |
| struct as3645a_config *cfg = &flash->cfg; |
| int rval; |
| |
| device_for_each_child_node_scoped(dev, child) { |
| u32 id = 0; |
| |
| fwnode_property_read_u32(child, "reg", &id); |
| |
| switch (id) { |
| case AS_LED_FLASH: |
| flash->flash_node = child; |
| fwnode_handle_get(child); |
| break; |
| case AS_LED_INDICATOR: |
| flash->indicator_node = child; |
| fwnode_handle_get(child); |
| break; |
| default: |
| dev_warn(&flash->client->dev, |
| "unknown LED %u encountered, ignoring\n", id); |
| break; |
| } |
| } |
| |
| if (!flash->flash_node) { |
| dev_err(&flash->client->dev, "can't find flash node\n"); |
| return -ENODEV; |
| } |
| |
| rval = fwnode_property_read_u32(flash->flash_node, "flash-timeout-us", |
| &cfg->flash_timeout_us); |
| if (rval < 0) { |
| dev_err(&flash->client->dev, |
| "can't read flash-timeout-us property for flash\n"); |
| goto out_err; |
| } |
| |
| rval = fwnode_property_read_u32(flash->flash_node, "flash-max-microamp", |
| &cfg->flash_max_ua); |
| if (rval < 0) { |
| dev_err(&flash->client->dev, |
| "can't read flash-max-microamp property for flash\n"); |
| goto out_err; |
| } |
| |
| rval = fwnode_property_read_u32(flash->flash_node, "led-max-microamp", |
| &cfg->assist_max_ua); |
| if (rval < 0) { |
| dev_err(&flash->client->dev, |
| "can't read led-max-microamp property for flash\n"); |
| goto out_err; |
| } |
| |
| fwnode_property_read_u32(flash->flash_node, "voltage-reference", |
| &cfg->voltage_reference); |
| |
| fwnode_property_read_u32(flash->flash_node, "ams,input-max-microamp", |
| &cfg->peak); |
| cfg->peak = AS_PEAK_mA_TO_REG(cfg->peak); |
| |
| if (!flash->indicator_node) { |
| dev_warn(&flash->client->dev, |
| "can't find indicator node\n"); |
| rval = -ENODEV; |
| goto out_err; |
| } |
| |
| |
| rval = fwnode_property_read_u32(flash->indicator_node, |
| "led-max-microamp", |
| &cfg->indicator_max_ua); |
| if (rval < 0) { |
| dev_err(&flash->client->dev, |
| "can't read led-max-microamp property for indicator\n"); |
| goto out_err; |
| } |
| |
| return 0; |
| |
| out_err: |
| fwnode_handle_put(flash->flash_node); |
| fwnode_handle_put(flash->indicator_node); |
| |
| return rval; |
| } |
| |
| static int as3645a_led_class_setup(struct as3645a *flash) |
| { |
| struct led_classdev *fled_cdev = &flash->fled.led_cdev; |
| struct led_classdev *iled_cdev = &flash->iled_cdev; |
| struct led_init_data init_data = {}; |
| struct led_flash_setting *cfg; |
| int rval; |
| |
| iled_cdev->brightness_set_blocking = as3645a_set_indicator_brightness; |
| iled_cdev->max_brightness = |
| flash->cfg.indicator_max_ua / AS_INDICATOR_INTENSITY_STEP; |
| iled_cdev->flags = LED_CORE_SUSPENDRESUME; |
| |
| init_data.fwnode = flash->indicator_node; |
| init_data.devicename = AS_NAME; |
| init_data.default_label = "indicator"; |
| |
| rval = led_classdev_register_ext(&flash->client->dev, iled_cdev, |
| &init_data); |
| if (rval < 0) |
| return rval; |
| |
| cfg = &flash->fled.brightness; |
| cfg->min = AS_FLASH_INTENSITY_MIN; |
| cfg->max = flash->cfg.flash_max_ua; |
| cfg->step = AS_FLASH_INTENSITY_STEP; |
| cfg->val = flash->cfg.flash_max_ua; |
| |
| cfg = &flash->fled.timeout; |
| cfg->min = AS_FLASH_TIMEOUT_MIN; |
| cfg->max = flash->cfg.flash_timeout_us; |
| cfg->step = AS_FLASH_TIMEOUT_STEP; |
| cfg->val = flash->cfg.flash_timeout_us; |
| |
| flash->fled.ops = &as3645a_led_flash_ops; |
| |
| fled_cdev->brightness_set_blocking = as3645a_set_assist_brightness; |
| /* Value 0 is off in LED class. */ |
| fled_cdev->max_brightness = |
| as3645a_current_to_reg(flash, false, |
| flash->cfg.assist_max_ua) + 1; |
| fled_cdev->flags = LED_DEV_CAP_FLASH | LED_CORE_SUSPENDRESUME; |
| |
| init_data.fwnode = flash->flash_node; |
| init_data.devicename = AS_NAME; |
| init_data.default_label = "flash"; |
| |
| rval = led_classdev_flash_register_ext(&flash->client->dev, |
| &flash->fled, &init_data); |
| if (rval) |
| goto out_err; |
| |
| return rval; |
| |
| out_err: |
| led_classdev_unregister(iled_cdev); |
| dev_err(&flash->client->dev, |
| "led_classdev_flash_register() failed, error %d\n", |
| rval); |
| return rval; |
| } |
| |
| static int as3645a_v4l2_setup(struct as3645a *flash) |
| { |
| struct led_classdev_flash *fled = &flash->fled; |
| struct led_classdev *led = &fled->led_cdev; |
| struct v4l2_flash_config cfg = { |
| .intensity = { |
| .min = AS_TORCH_INTENSITY_MIN, |
| .max = flash->cfg.assist_max_ua, |
| .step = AS_TORCH_INTENSITY_STEP, |
| .val = flash->cfg.assist_max_ua, |
| }, |
| }; |
| struct v4l2_flash_config cfgind = { |
| .intensity = { |
| .min = AS_INDICATOR_INTENSITY_MIN, |
| .max = flash->cfg.indicator_max_ua, |
| .step = AS_INDICATOR_INTENSITY_STEP, |
| .val = flash->cfg.indicator_max_ua, |
| }, |
| }; |
| |
| strscpy(cfg.dev_name, led->dev->kobj.name, sizeof(cfg.dev_name)); |
| strscpy(cfgind.dev_name, flash->iled_cdev.dev->kobj.name, |
| sizeof(cfgind.dev_name)); |
| |
| flash->vf = v4l2_flash_init( |
| &flash->client->dev, flash->flash_node, &flash->fled, NULL, |
| &cfg); |
| if (IS_ERR(flash->vf)) |
| return PTR_ERR(flash->vf); |
| |
| flash->vfind = v4l2_flash_indicator_init( |
| &flash->client->dev, flash->indicator_node, &flash->iled_cdev, |
| &cfgind); |
| if (IS_ERR(flash->vfind)) { |
| v4l2_flash_release(flash->vf); |
| return PTR_ERR(flash->vfind); |
| } |
| |
| return 0; |
| } |
| |
| static int as3645a_probe(struct i2c_client *client) |
| { |
| struct as3645a *flash; |
| int rval; |
| |
| if (!dev_fwnode(&client->dev)) |
| return -ENODEV; |
| |
| flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL); |
| if (flash == NULL) |
| return -ENOMEM; |
| |
| flash->client = client; |
| |
| rval = as3645a_parse_node(&client->dev, flash); |
| if (rval < 0) |
| return rval; |
| |
| rval = as3645a_detect(flash); |
| if (rval < 0) |
| goto out_put_nodes; |
| |
| mutex_init(&flash->mutex); |
| i2c_set_clientdata(client, flash); |
| |
| rval = as3645a_setup(flash); |
| if (rval) |
| goto out_mutex_destroy; |
| |
| rval = as3645a_led_class_setup(flash); |
| if (rval) |
| goto out_mutex_destroy; |
| |
| rval = as3645a_v4l2_setup(flash); |
| if (rval) |
| goto out_led_classdev_flash_unregister; |
| |
| return 0; |
| |
| out_led_classdev_flash_unregister: |
| led_classdev_flash_unregister(&flash->fled); |
| |
| out_mutex_destroy: |
| mutex_destroy(&flash->mutex); |
| |
| out_put_nodes: |
| fwnode_handle_put(flash->flash_node); |
| fwnode_handle_put(flash->indicator_node); |
| |
| return rval; |
| } |
| |
| static void as3645a_remove(struct i2c_client *client) |
| { |
| struct as3645a *flash = i2c_get_clientdata(client); |
| |
| as3645a_set_control(flash, AS_MODE_EXT_TORCH, false); |
| |
| v4l2_flash_release(flash->vf); |
| v4l2_flash_release(flash->vfind); |
| |
| led_classdev_flash_unregister(&flash->fled); |
| led_classdev_unregister(&flash->iled_cdev); |
| |
| mutex_destroy(&flash->mutex); |
| |
| fwnode_handle_put(flash->flash_node); |
| fwnode_handle_put(flash->indicator_node); |
| } |
| |
| static const struct i2c_device_id as3645a_id_table[] = { |
| { AS_NAME }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(i2c, as3645a_id_table); |
| |
| static const struct of_device_id as3645a_of_table[] = { |
| { .compatible = "ams,as3645a" }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(of, as3645a_of_table); |
| |
| static struct i2c_driver as3645a_i2c_driver = { |
| .driver = { |
| .of_match_table = as3645a_of_table, |
| .name = AS_NAME, |
| }, |
| .probe = as3645a_probe, |
| .remove = as3645a_remove, |
| .id_table = as3645a_id_table, |
| }; |
| |
| module_i2c_driver(as3645a_i2c_driver); |
| |
| MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); |
| MODULE_AUTHOR("Sakari Ailus <sakari.ailus@iki.fi>"); |
| MODULE_DESCRIPTION("LED flash driver for AS3645A, LM3555 and their clones"); |
| MODULE_LICENSE("GPL v2"); |