M: Sakari Ailus <sakari.ailus@iki.fi>
L: linux-leds@vger.kernel.org
S: Maintained
-F: drivers/leds/leds-as3645a.c
+F: drivers/leds/flash/leds-as3645a.c
ASAHI KASEI AK7375 LENS VOICE COIL DRIVER
M: Tianshu Qiu <tian.shu.qiu@intel.com>
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
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-$(CONFIG_LEDS_BCM6328) += leds-bcm6328.o
help
This option enables support for the LEDs on the AAT1290.
+config LEDS_AS3645A
+ tristate "AS3645A and LM3555 LED flash controllers support"
+ depends on I2C
+ depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS
+ help
+ Enable LED flash class support for AS3645A LED flash
+ controller. V4L2 flash API is provided as well if
+ CONFIG_V4L2_FLASH_API is enabled.
+
config LEDS_RT4505
tristate "LED support for RT4505 flashlight controller"
depends on I2C && OF
# SPDX-License-Identifier: GPL-2.0
obj-$(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
--- /dev/null
+// 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 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 <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");
+++ /dev/null
-// 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 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 <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");
projects / linux.git / commitdiff