diff options
| -rw-r--r-- | MAINTAINERS | 6 | ||||
| -rw-r--r-- | drivers/leds/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/leds/Makefile | 1 | ||||
| -rw-r--r-- | drivers/leds/leds-as3645a.c | 763 |
4 files changed, 778 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index af94fff63da8..eb930ebecfcb 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2124,6 +2124,12 @@ F: arch/arm64/ F: Documentation/arm64/ AS3645A LED FLASH CONTROLLER DRIVER +M: Sakari Ailus <sakari.ailus@iki.fi> +L: linux-leds@vger.kernel.org +S: Maintained +F: drivers/leds/leds-as3645a.c + +AS3645A LED FLASH CONTROLLER DRIVER M: Laurent Pinchart <laurent.pinchart@ideasonboard.com> L: linux-media@vger.kernel.org T: git git://linuxtv.org/media_tree.git diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 594b24d410c3..bad3a4098104 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -58,6 +58,14 @@ config LEDS_AAT1290 help This option enables support for the LEDs on the AAT1290. +config LEDS_AS3645A + tristate "AS3645A LED flash controller support" + depends on I2C && LEDS_CLASS_FLASH + help + Enable LED flash class support for AS3645A LED flash + controller. V4L2 flash API is provided as well if + CONFIG_V4L2_FLASH_API is enabled. + config LEDS_BCM6328 tristate "LED Support for Broadcom BCM6328" depends on LEDS_CLASS diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 909dae62ba05..7d7b26552923 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_LEDS_TRIGGERS) += led-triggers.o # LED Platform Drivers obj-$(CONFIG_LEDS_88PM860X) += leds-88pm860x.o obj-$(CONFIG_LEDS_AAT1290) += leds-aat1290.o +obj-$(CONFIG_LEDS_AS3645A) += leds-as3645a.o obj-$(CONFIG_LEDS_BCM6328) += leds-bcm6328.o obj-$(CONFIG_LEDS_BCM6358) += leds-bcm6358.o obj-$(CONFIG_LEDS_BD2802) += leds-bd2802.o diff --git a/drivers/leds/leds-as3645a.c b/drivers/leds/leds-as3645a.c new file mode 100644 index 000000000000..bbbbe0898233 --- /dev/null +++ b/drivers/leds/leds-as3645a.c @@ -0,0 +1,763 @@ +/* + * 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> + * + * 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. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#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/of.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) + +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_names { + char flash[32]; + char indicator[32]; +}; + +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 device_node *flash_node; + struct device_node *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_config - 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 as3645a *flash, + struct as3645a_names *names, + struct device_node *node) +{ + struct as3645a_config *cfg = &flash->cfg; + const char *name; + int rval; + + flash->flash_node = of_get_child_by_name(node, "flash"); + if (!flash->flash_node) { + dev_err(&flash->client->dev, "can't find flash node\n"); + return -ENODEV; + } + + rval = of_property_read_string(flash->flash_node, "label", &name); + if (!rval) + strlcpy(names->flash, name, sizeof(names->flash)); + else + snprintf(names->flash, sizeof(names->flash), + "%s:flash", node->name); + + rval = of_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 = of_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 = of_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; + } + + of_property_read_u32(flash->flash_node, "voltage-reference", + &cfg->voltage_reference); + + of_property_read_u32(flash->flash_node, "peak-current-limit", + &cfg->peak); + cfg->peak = AS_PEAK_mA_TO_REG(cfg->peak); + + flash->indicator_node = of_get_child_by_name(node, "indicator"); + if (!flash->indicator_node) { + dev_warn(&flash->client->dev, + "can't find indicator node\n"); + goto out_err; + } + + rval = of_property_read_string(flash->indicator_node, "label", &name); + if (!rval) + strlcpy(names->indicator, name, sizeof(names->indicator)); + else + snprintf(names->indicator, sizeof(names->indicator), + "%s:indicator", node->name); + + rval = of_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: + of_node_put(flash->flash_node); + of_node_put(flash->indicator_node); + + return rval; +} + +static int as3645a_led_class_setup(struct as3645a *flash, + struct as3645a_names *names) +{ + struct led_classdev *fled_cdev = &flash->fled.led_cdev; + struct led_classdev *iled_cdev = &flash->iled_cdev; + struct led_flash_setting *cfg; + int rval; + + iled_cdev->name = names->indicator; + 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; + + rval = led_classdev_register(&flash->client->dev, iled_cdev); + 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->name = names->flash; + 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; + + rval = led_classdev_flash_register(&flash->client->dev, &flash->fled); + if (rval) { + 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, + }, + }; + + strlcpy(cfg.dev_name, led->name, sizeof(cfg.dev_name)); + strlcpy(cfgind.dev_name, flash->iled_cdev.name, sizeof(cfg.dev_name)); + + flash->vf = v4l2_flash_init( + &flash->client->dev, of_fwnode_handle(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, of_fwnode_handle(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_names names; + struct as3645a *flash; + int rval; + + if (client->dev.of_node == NULL) + return -ENODEV; + + flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL); + if (flash == NULL) + return -ENOMEM; + + flash->client = client; + + rval = as3645a_parse_node(flash, &names, client->dev.of_node); + 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, &names); + 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: + of_node_put(flash->flash_node); + of_node_put(flash->indicator_node); + + return rval; +} + +static int 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); + + led_classdev_flash_unregister(&flash->fled); + led_classdev_unregister(&flash->iled_cdev); + + mutex_destroy(&flash->mutex); + + of_node_put(flash->flash_node); + of_node_put(flash->indicator_node); + + return 0; +} + +static const struct i2c_device_id as3645a_id_table[] = { + { AS_NAME, 0 }, + { }, +}; +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_new = 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"); |