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alistair23-linux/drivers/leds/leds-as3645a.c
Thomas Gleixner 1802d0beec treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 655 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:41 -07:00

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// 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_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 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_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 fwnode_handle *fwnode)
{
struct as3645a_config *cfg = &flash->cfg;
struct fwnode_handle *child;
const char *name;
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;
break;
case AS_LED_INDICATOR:
flash->indicator_node = child;
break;
default:
dev_warn(&flash->client->dev,
"unknown LED %u encountered, ignoring\n", id);
break;
}
fwnode_handle_get(child);
}
if (!flash->flash_node) {
dev_err(&flash->client->dev, "can't find flash node\n");
return -ENODEV;
}
rval = fwnode_property_read_string(flash->flash_node, "label", &name);
if (!rval) {
strlcpy(names->flash, name, sizeof(names->flash));
} else if (is_of_node(fwnode)) {
snprintf(names->flash, sizeof(names->flash),
"%pOFn:flash", to_of_node(fwnode));
} else {
dev_err(&flash->client->dev, "flash node has no label!\n");
return -EINVAL;
}
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");
goto out_err;
}
rval = fwnode_property_read_string(flash->indicator_node, "label",
&name);
if (!rval) {
strlcpy(names->indicator, name, sizeof(names->indicator));
} else if (is_of_node(fwnode)) {
snprintf(names->indicator, sizeof(names->indicator),
"%pOFn:indicator", to_of_node(fwnode));
} else {
dev_err(&flash->client->dev, "indicator node has no label!\n");
return -EINVAL;
}
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 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, 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_names names;
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, &names, 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, &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:
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");
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