From f5d69f6290a37f5579ef24334d5bf8a59bb13ef4 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Fri, 28 May 2021 22:24:00 +0200 Subject: leds: as3645a: Move driver to flash subdirectory We created a subdirectory for LED drivers that depend on CONFIG_LEDS_CLASS_FLASH, and this driver does so let's move it there. Signed-off-by: Linus Walleij Acked-by: Sakari Ailus Signed-off-by: Pavel Machek --- drivers/leds/Kconfig | 9 - drivers/leds/Makefile | 1 - drivers/leds/flash/Kconfig | 9 + drivers/leds/flash/Makefile | 1 + drivers/leds/flash/leds-as3645a.c | 774 ++++++++++++++++++++++++++++++++++++++ drivers/leds/leds-as3645a.c | 774 -------------------------------------- 6 files changed, 784 insertions(+), 784 deletions(-) create mode 100644 drivers/leds/flash/leds-as3645a.c delete mode 100644 drivers/leds/leds-as3645a.c (limited to 'drivers/leds') diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index a350d8fbb085..cfa6b8194b6b 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -94,15 +94,6 @@ config LEDS_ARIEL Say Y to if your machine is a Dell Wyse 3020 thin client. -config LEDS_AS3645A - tristate "AS3645A and LM3555 LED flash controllers support" - depends on I2C && LEDS_CLASS_FLASH - depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS - 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_AW2013 tristate "LED support for Awinic AW2013" depends on LEDS_CLASS && I2C && OF diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index c7231975837a..a3a6fda8ab99 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -14,7 +14,6 @@ obj-$(CONFIG_LEDS_ADP5520) += leds-adp5520.o obj-$(CONFIG_LEDS_AN30259A) += leds-an30259a.o obj-$(CONFIG_LEDS_APU) += leds-apu.o obj-$(CONFIG_LEDS_ARIEL) += leds-ariel.o -obj-$(CONFIG_LEDS_AS3645A) += leds-as3645a.o obj-$(CONFIG_LEDS_ASIC3) += leds-asic3.o obj-$(CONFIG_LEDS_AW2013) += leds-aw2013.o obj-$(CONFIG_LEDS_BCM6328) += leds-bcm6328.o diff --git a/drivers/leds/flash/Kconfig b/drivers/leds/flash/Kconfig index 736153b0bfd6..1126ad3954b6 100644 --- a/drivers/leds/flash/Kconfig +++ b/drivers/leds/flash/Kconfig @@ -11,6 +11,15 @@ config LEDS_AAT1290 help This option enables support for the LEDs on the AAT1290. +config LEDS_AS3645A + tristate "AS3645A and LM3555 LED flash controllers support" + depends on I2C + depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS + 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_RT4505 tristate "LED support for RT4505 flashlight controller" depends on I2C && OF diff --git a/drivers/leds/flash/Makefile b/drivers/leds/flash/Makefile index 11bec5881d51..9bb2fccee047 100644 --- a/drivers/leds/flash/Makefile +++ b/drivers/leds/flash/Makefile @@ -1,5 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_LEDS_AAT1290) += leds-aat1290.o +obj-$(CONFIG_LEDS_AS3645A) += leds-as3645a.o obj-$(CONFIG_LEDS_RT4505) += leds-rt4505.o obj-$(CONFIG_LEDS_RT8515) += leds-rt8515.o diff --git a/drivers/leds/flash/leds-as3645a.c b/drivers/leds/flash/leds-as3645a.c new file mode 100644 index 000000000000..aa3f82be0a9c --- /dev/null +++ b/drivers/leds/flash/leds-as3645a.c @@ -0,0 +1,774 @@ +// 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 + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#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 as3645a *flash, + struct fwnode_handle *fwnode) +{ + struct as3645a_config *cfg = &flash->cfg; + struct fwnode_handle *child; + int rval; + + fwnode_for_each_child_node(fwnode, 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, + }, + }; + + strlcpy(cfg.dev_name, led->dev->kobj.name, sizeof(cfg.dev_name)); + strlcpy(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(flash, dev_fwnode(&client->dev)); + 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 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); + 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); + + 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 "); +MODULE_AUTHOR("Sakari Ailus "); +MODULE_DESCRIPTION("LED flash driver for AS3645A, LM3555 and their clones"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/leds/leds-as3645a.c b/drivers/leds/leds-as3645a.c deleted file mode 100644 index aa3f82be0a9c..000000000000 --- a/drivers/leds/leds-as3645a.c +++ /dev/null @@ -1,774 +0,0 @@ -// 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 - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include - -#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 as3645a *flash, - struct fwnode_handle *fwnode) -{ - struct as3645a_config *cfg = &flash->cfg; - struct fwnode_handle *child; - int rval; - - fwnode_for_each_child_node(fwnode, 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, - }, - }; - - strlcpy(cfg.dev_name, led->dev->kobj.name, sizeof(cfg.dev_name)); - strlcpy(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(flash, dev_fwnode(&client->dev)); - 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 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); - 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); - - 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 "); -MODULE_AUTHOR("Sakari Ailus "); -MODULE_DESCRIPTION("LED flash driver for AS3645A, LM3555 and their clones"); -MODULE_LICENSE("GPL v2"); -- cgit v1.2.3