mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 02:39:48 +00:00
![Rob Herring](/assets/img/avatar_default.png)
In preparation to remove the node name pointer from struct device_node, convert printf users to use the %pOFn format specifier. Signed-off-by: Rob Herring <robh@kernel.org> Cc: linux-leds@vger.kernel.org Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
787 lines
20 KiB
C
787 lines
20 KiB
C
/*
|
|
* drivers/leds/leds-as3645a.c - AS3645A and LM3555 flash controllers driver
|
|
*
|
|
* Copyright (C) 2008-2011 Nokia Corporation
|
|
* Copyright (c) 2011, 2017 Intel Corporation.
|
|
*
|
|
* Based on drivers/media/i2c/as3645a.c.
|
|
*
|
|
* Contact: Sakari Ailus <sakari.ailus@iki.fi>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*/
|
|
|
|
#include <linux/delay.h>
|
|
#include <linux/gpio/consumer.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/led-class-flash.h>
|
|
#include <linux/leds.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/of.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <media/v4l2-flash-led-class.h>
|
|
|
|
#define AS_TIMER_US_TO_CODE(t) (((t) / 1000 - 100) / 50)
|
|
#define AS_TIMER_CODE_TO_US(c) ((50 * (c) + 100) * 1000)
|
|
|
|
/* Register definitions */
|
|
|
|
/* Read-only Design info register: Reset state: xxxx 0001 */
|
|
#define AS_DESIGN_INFO_REG 0x00
|
|
#define AS_DESIGN_INFO_FACTORY(x) (((x) >> 4))
|
|
#define AS_DESIGN_INFO_MODEL(x) ((x) & 0x0f)
|
|
|
|
/* Read-only Version control register: Reset state: 0000 0000
|
|
* for first engineering samples
|
|
*/
|
|
#define AS_VERSION_CONTROL_REG 0x01
|
|
#define AS_VERSION_CONTROL_RFU(x) (((x) >> 4))
|
|
#define AS_VERSION_CONTROL_VERSION(x) ((x) & 0x0f)
|
|
|
|
/* Read / Write (Indicator and timer register): Reset state: 0000 1111 */
|
|
#define AS_INDICATOR_AND_TIMER_REG 0x02
|
|
#define AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT 0
|
|
#define AS_INDICATOR_AND_TIMER_VREF_SHIFT 4
|
|
#define AS_INDICATOR_AND_TIMER_INDICATOR_SHIFT 6
|
|
|
|
/* Read / Write (Current set register): Reset state: 0110 1001 */
|
|
#define AS_CURRENT_SET_REG 0x03
|
|
#define AS_CURRENT_ASSIST_LIGHT_SHIFT 0
|
|
#define AS_CURRENT_LED_DET_ON (1 << 3)
|
|
#define AS_CURRENT_FLASH_CURRENT_SHIFT 4
|
|
|
|
/* Read / Write (Control register): Reset state: 1011 0100 */
|
|
#define AS_CONTROL_REG 0x04
|
|
#define AS_CONTROL_MODE_SETTING_SHIFT 0
|
|
#define AS_CONTROL_STROBE_ON (1 << 2)
|
|
#define AS_CONTROL_OUT_ON (1 << 3)
|
|
#define AS_CONTROL_EXT_TORCH_ON (1 << 4)
|
|
#define AS_CONTROL_STROBE_TYPE_EDGE (0 << 5)
|
|
#define AS_CONTROL_STROBE_TYPE_LEVEL (1 << 5)
|
|
#define AS_CONTROL_COIL_PEAK_SHIFT 6
|
|
|
|
/* Read only (D3 is read / write) (Fault and info): Reset state: 0000 x000 */
|
|
#define AS_FAULT_INFO_REG 0x05
|
|
#define AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT (1 << 1)
|
|
#define AS_FAULT_INFO_INDICATOR_LED (1 << 2)
|
|
#define AS_FAULT_INFO_LED_AMOUNT (1 << 3)
|
|
#define AS_FAULT_INFO_TIMEOUT (1 << 4)
|
|
#define AS_FAULT_INFO_OVER_TEMPERATURE (1 << 5)
|
|
#define AS_FAULT_INFO_SHORT_CIRCUIT (1 << 6)
|
|
#define AS_FAULT_INFO_OVER_VOLTAGE (1 << 7)
|
|
|
|
/* Boost register */
|
|
#define AS_BOOST_REG 0x0d
|
|
#define AS_BOOST_CURRENT_DISABLE (0 << 0)
|
|
#define AS_BOOST_CURRENT_ENABLE (1 << 0)
|
|
|
|
/* Password register is used to unlock boost register writing */
|
|
#define AS_PASSWORD_REG 0x0f
|
|
#define AS_PASSWORD_UNLOCK_VALUE 0x55
|
|
|
|
#define AS_NAME "as3645a"
|
|
#define AS_I2C_ADDR (0x60 >> 1) /* W:0x60, R:0x61 */
|
|
|
|
#define AS_FLASH_TIMEOUT_MIN 100000 /* us */
|
|
#define AS_FLASH_TIMEOUT_MAX 850000
|
|
#define AS_FLASH_TIMEOUT_STEP 50000
|
|
|
|
#define AS_FLASH_INTENSITY_MIN 200000 /* uA */
|
|
#define AS_FLASH_INTENSITY_MAX_1LED 500000
|
|
#define AS_FLASH_INTENSITY_MAX_2LEDS 400000
|
|
#define AS_FLASH_INTENSITY_STEP 20000
|
|
|
|
#define AS_TORCH_INTENSITY_MIN 20000 /* uA */
|
|
#define AS_TORCH_INTENSITY_MAX 160000
|
|
#define AS_TORCH_INTENSITY_STEP 20000
|
|
|
|
#define AS_INDICATOR_INTENSITY_MIN 0 /* uA */
|
|
#define AS_INDICATOR_INTENSITY_MAX 10000
|
|
#define AS_INDICATOR_INTENSITY_STEP 2500
|
|
|
|
#define AS_PEAK_mA_MAX 2000
|
|
#define AS_PEAK_mA_TO_REG(a) \
|
|
((min_t(u32, AS_PEAK_mA_MAX, a) - 1250) / 250)
|
|
|
|
/* 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 device_node *flash_node;
|
|
struct device_node *indicator_node;
|
|
|
|
struct as3645a_config cfg;
|
|
|
|
enum as_mode mode;
|
|
unsigned int timeout;
|
|
unsigned int flash_current;
|
|
unsigned int assist_current;
|
|
unsigned int indicator_current;
|
|
enum v4l2_flash_strobe_source strobe_source;
|
|
};
|
|
|
|
#define fled_to_as3645a(__fled) container_of(__fled, struct as3645a, fled)
|
|
#define iled_cdev_to_as3645a(__iled_cdev) \
|
|
container_of(__iled_cdev, struct as3645a, iled_cdev)
|
|
|
|
/* Return negative errno else zero on success */
|
|
static int as3645a_write(struct as3645a *flash, u8 addr, u8 val)
|
|
{
|
|
struct i2c_client *client = flash->client;
|
|
int rval;
|
|
|
|
rval = i2c_smbus_write_byte_data(client, addr, val);
|
|
|
|
dev_dbg(&client->dev, "Write Addr:%02X Val:%02X %s\n", addr, val,
|
|
rval < 0 ? "fail" : "ok");
|
|
|
|
return rval;
|
|
}
|
|
|
|
/* Return negative errno else a data byte received from the device. */
|
|
static int as3645a_read(struct as3645a *flash, u8 addr)
|
|
{
|
|
struct i2c_client *client = flash->client;
|
|
int rval;
|
|
|
|
rval = i2c_smbus_read_byte_data(client, addr);
|
|
|
|
dev_dbg(&client->dev, "Read Addr:%02X Val:%02X %s\n", addr, rval,
|
|
rval < 0 ? "fail" : "ok");
|
|
|
|
return rval;
|
|
}
|
|
|
|
/* -----------------------------------------------------------------------------
|
|
* Hardware configuration and trigger
|
|
*/
|
|
|
|
/**
|
|
* as3645a_set_config - Set flash configuration registers
|
|
* @flash: The flash
|
|
*
|
|
* Configure the hardware with flash, assist and indicator currents, as well as
|
|
* flash timeout.
|
|
*
|
|
* Return 0 on success, or a negative error code if an I2C communication error
|
|
* occurred.
|
|
*/
|
|
static int as3645a_set_current(struct as3645a *flash)
|
|
{
|
|
u8 val;
|
|
|
|
val = (flash->flash_current << AS_CURRENT_FLASH_CURRENT_SHIFT)
|
|
| (flash->assist_current << AS_CURRENT_ASSIST_LIGHT_SHIFT)
|
|
| AS_CURRENT_LED_DET_ON;
|
|
|
|
return as3645a_write(flash, AS_CURRENT_SET_REG, val);
|
|
}
|
|
|
|
static int as3645a_set_timeout(struct as3645a *flash)
|
|
{
|
|
u8 val;
|
|
|
|
val = flash->timeout << AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT;
|
|
|
|
val |= (flash->cfg.voltage_reference
|
|
<< AS_INDICATOR_AND_TIMER_VREF_SHIFT)
|
|
| ((flash->indicator_current ? flash->indicator_current - 1 : 0)
|
|
<< AS_INDICATOR_AND_TIMER_INDICATOR_SHIFT);
|
|
|
|
return as3645a_write(flash, AS_INDICATOR_AND_TIMER_REG, val);
|
|
}
|
|
|
|
/**
|
|
* as3645a_set_control - Set flash control register
|
|
* @flash: The flash
|
|
* @mode: Desired output mode
|
|
* @on: Desired output state
|
|
*
|
|
* Configure the hardware with output mode and state.
|
|
*
|
|
* Return 0 on success, or a negative error code if an I2C communication error
|
|
* occurred.
|
|
*/
|
|
static int
|
|
as3645a_set_control(struct as3645a *flash, enum as_mode mode, bool on)
|
|
{
|
|
u8 reg;
|
|
|
|
/* Configure output parameters and operation mode. */
|
|
reg = (flash->cfg.peak << AS_CONTROL_COIL_PEAK_SHIFT)
|
|
| (on ? AS_CONTROL_OUT_ON : 0)
|
|
| mode;
|
|
|
|
if (mode == AS_MODE_FLASH &&
|
|
flash->strobe_source == V4L2_FLASH_STROBE_SOURCE_EXTERNAL)
|
|
reg |= AS_CONTROL_STROBE_TYPE_LEVEL
|
|
| AS_CONTROL_STROBE_ON;
|
|
|
|
return as3645a_write(flash, AS_CONTROL_REG, reg);
|
|
}
|
|
|
|
static int as3645a_get_fault(struct led_classdev_flash *fled, u32 *fault)
|
|
{
|
|
struct as3645a *flash = fled_to_as3645a(fled);
|
|
int rval;
|
|
|
|
/* NOTE: reading register clears fault status */
|
|
rval = as3645a_read(flash, AS_FAULT_INFO_REG);
|
|
if (rval < 0)
|
|
return rval;
|
|
|
|
if (rval & AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT)
|
|
*fault |= LED_FAULT_OVER_CURRENT;
|
|
|
|
if (rval & AS_FAULT_INFO_INDICATOR_LED)
|
|
*fault |= LED_FAULT_INDICATOR;
|
|
|
|
dev_dbg(&flash->client->dev, "%u connected LEDs\n",
|
|
rval & AS_FAULT_INFO_LED_AMOUNT ? 2 : 1);
|
|
|
|
if (rval & AS_FAULT_INFO_TIMEOUT)
|
|
*fault |= LED_FAULT_TIMEOUT;
|
|
|
|
if (rval & AS_FAULT_INFO_OVER_TEMPERATURE)
|
|
*fault |= LED_FAULT_OVER_TEMPERATURE;
|
|
|
|
if (rval & AS_FAULT_INFO_SHORT_CIRCUIT)
|
|
*fault |= LED_FAULT_OVER_CURRENT;
|
|
|
|
if (rval & AS_FAULT_INFO_OVER_VOLTAGE)
|
|
*fault |= LED_FAULT_INPUT_VOLTAGE;
|
|
|
|
return rval;
|
|
}
|
|
|
|
static unsigned int __as3645a_current_to_reg(unsigned int min, unsigned int max,
|
|
unsigned int step,
|
|
unsigned int val)
|
|
{
|
|
if (val < min)
|
|
val = min;
|
|
|
|
if (val > max)
|
|
val = max;
|
|
|
|
return (val - min) / step;
|
|
}
|
|
|
|
static unsigned int as3645a_current_to_reg(struct as3645a *flash, bool is_flash,
|
|
unsigned int ua)
|
|
{
|
|
if (is_flash)
|
|
return __as3645a_current_to_reg(AS_TORCH_INTENSITY_MIN,
|
|
flash->cfg.assist_max_ua,
|
|
AS_TORCH_INTENSITY_STEP, ua);
|
|
else
|
|
return __as3645a_current_to_reg(AS_FLASH_INTENSITY_MIN,
|
|
flash->cfg.flash_max_ua,
|
|
AS_FLASH_INTENSITY_STEP, ua);
|
|
}
|
|
|
|
static int as3645a_set_indicator_brightness(struct led_classdev *iled_cdev,
|
|
enum led_brightness brightness)
|
|
{
|
|
struct as3645a *flash = iled_cdev_to_as3645a(iled_cdev);
|
|
int rval;
|
|
|
|
flash->indicator_current = brightness;
|
|
|
|
rval = as3645a_set_timeout(flash);
|
|
if (rval)
|
|
return rval;
|
|
|
|
return as3645a_set_control(flash, AS_MODE_INDICATOR, brightness);
|
|
}
|
|
|
|
static int as3645a_set_assist_brightness(struct led_classdev *fled_cdev,
|
|
enum led_brightness brightness)
|
|
{
|
|
struct led_classdev_flash *fled = lcdev_to_flcdev(fled_cdev);
|
|
struct as3645a *flash = fled_to_as3645a(fled);
|
|
int rval;
|
|
|
|
if (brightness) {
|
|
/* Register value 0 is 20 mA. */
|
|
flash->assist_current = brightness - 1;
|
|
|
|
rval = as3645a_set_current(flash);
|
|
if (rval)
|
|
return rval;
|
|
}
|
|
|
|
return as3645a_set_control(flash, AS_MODE_ASSIST, brightness);
|
|
}
|
|
|
|
static int as3645a_set_flash_brightness(struct led_classdev_flash *fled,
|
|
u32 brightness_ua)
|
|
{
|
|
struct as3645a *flash = fled_to_as3645a(fled);
|
|
|
|
flash->flash_current = as3645a_current_to_reg(flash, true,
|
|
brightness_ua);
|
|
|
|
return as3645a_set_current(flash);
|
|
}
|
|
|
|
static int as3645a_set_flash_timeout(struct led_classdev_flash *fled,
|
|
u32 timeout_us)
|
|
{
|
|
struct as3645a *flash = fled_to_as3645a(fled);
|
|
|
|
flash->timeout = AS_TIMER_US_TO_CODE(timeout_us);
|
|
|
|
return as3645a_set_timeout(flash);
|
|
}
|
|
|
|
static int as3645a_set_strobe(struct led_classdev_flash *fled, bool state)
|
|
{
|
|
struct as3645a *flash = fled_to_as3645a(fled);
|
|
|
|
return as3645a_set_control(flash, AS_MODE_FLASH, state);
|
|
}
|
|
|
|
static const struct led_flash_ops as3645a_led_flash_ops = {
|
|
.flash_brightness_set = as3645a_set_flash_brightness,
|
|
.timeout_set = as3645a_set_flash_timeout,
|
|
.strobe_set = as3645a_set_strobe,
|
|
.fault_get = as3645a_get_fault,
|
|
};
|
|
|
|
static int as3645a_setup(struct as3645a *flash)
|
|
{
|
|
struct device *dev = &flash->client->dev;
|
|
u32 fault = 0;
|
|
int rval;
|
|
|
|
/* clear errors */
|
|
rval = as3645a_read(flash, AS_FAULT_INFO_REG);
|
|
if (rval < 0)
|
|
return rval;
|
|
|
|
dev_dbg(dev, "Fault info: %02x\n", rval);
|
|
|
|
rval = as3645a_set_current(flash);
|
|
if (rval < 0)
|
|
return rval;
|
|
|
|
rval = as3645a_set_timeout(flash);
|
|
if (rval < 0)
|
|
return rval;
|
|
|
|
rval = as3645a_set_control(flash, AS_MODE_INDICATOR, false);
|
|
if (rval < 0)
|
|
return rval;
|
|
|
|
/* read status */
|
|
rval = as3645a_get_fault(&flash->fled, &fault);
|
|
if (rval < 0)
|
|
return rval;
|
|
|
|
dev_dbg(dev, "AS_INDICATOR_AND_TIMER_REG: %02x\n",
|
|
as3645a_read(flash, AS_INDICATOR_AND_TIMER_REG));
|
|
dev_dbg(dev, "AS_CURRENT_SET_REG: %02x\n",
|
|
as3645a_read(flash, AS_CURRENT_SET_REG));
|
|
dev_dbg(dev, "AS_CONTROL_REG: %02x\n",
|
|
as3645a_read(flash, AS_CONTROL_REG));
|
|
|
|
return rval & ~AS_FAULT_INFO_LED_AMOUNT ? -EIO : 0;
|
|
}
|
|
|
|
static int as3645a_detect(struct as3645a *flash)
|
|
{
|
|
struct device *dev = &flash->client->dev;
|
|
int rval, man, model, rfu, version;
|
|
const char *vendor;
|
|
|
|
rval = as3645a_read(flash, AS_DESIGN_INFO_REG);
|
|
if (rval < 0) {
|
|
dev_err(dev, "can't read design info reg\n");
|
|
return rval;
|
|
}
|
|
|
|
man = AS_DESIGN_INFO_FACTORY(rval);
|
|
model = AS_DESIGN_INFO_MODEL(rval);
|
|
|
|
rval = as3645a_read(flash, AS_VERSION_CONTROL_REG);
|
|
if (rval < 0) {
|
|
dev_err(dev, "can't read version control reg\n");
|
|
return rval;
|
|
}
|
|
|
|
rfu = AS_VERSION_CONTROL_RFU(rval);
|
|
version = AS_VERSION_CONTROL_VERSION(rval);
|
|
|
|
/* Verify the chip model and version. */
|
|
if (model != 0x01 || rfu != 0x00) {
|
|
dev_err(dev, "AS3645A not detected (model %d rfu %d)\n",
|
|
model, rfu);
|
|
return -ENODEV;
|
|
}
|
|
|
|
switch (man) {
|
|
case 1:
|
|
vendor = "AMS, Austria Micro Systems";
|
|
break;
|
|
case 2:
|
|
vendor = "ADI, Analog Devices Inc.";
|
|
break;
|
|
case 3:
|
|
vendor = "NSC, National Semiconductor";
|
|
break;
|
|
case 4:
|
|
vendor = "NXP";
|
|
break;
|
|
case 5:
|
|
vendor = "TI, Texas Instrument";
|
|
break;
|
|
default:
|
|
vendor = "Unknown";
|
|
}
|
|
|
|
dev_info(dev, "Chip vendor: %s (%d) Version: %d\n", vendor,
|
|
man, version);
|
|
|
|
rval = as3645a_write(flash, AS_PASSWORD_REG, AS_PASSWORD_UNLOCK_VALUE);
|
|
if (rval < 0)
|
|
return rval;
|
|
|
|
return as3645a_write(flash, AS_BOOST_REG, AS_BOOST_CURRENT_DISABLE);
|
|
}
|
|
|
|
static int as3645a_parse_node(struct as3645a *flash,
|
|
struct as3645a_names *names,
|
|
struct device_node *node)
|
|
{
|
|
struct as3645a_config *cfg = &flash->cfg;
|
|
struct device_node *child;
|
|
const char *name;
|
|
int rval;
|
|
|
|
for_each_child_of_node(node, child) {
|
|
u32 id = 0;
|
|
|
|
of_property_read_u32(child, "reg", &id);
|
|
|
|
switch (id) {
|
|
case AS_LED_FLASH:
|
|
flash->flash_node = of_node_get(child);
|
|
break;
|
|
case AS_LED_INDICATOR:
|
|
flash->indicator_node = of_node_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 = of_property_read_string(flash->flash_node, "label", &name);
|
|
if (!rval)
|
|
strlcpy(names->flash, name, sizeof(names->flash));
|
|
else
|
|
snprintf(names->flash, sizeof(names->flash),
|
|
"%pOFn:flash", node);
|
|
|
|
rval = of_property_read_u32(flash->flash_node, "flash-timeout-us",
|
|
&cfg->flash_timeout_us);
|
|
if (rval < 0) {
|
|
dev_err(&flash->client->dev,
|
|
"can't read flash-timeout-us property for flash\n");
|
|
goto out_err;
|
|
}
|
|
|
|
rval = of_property_read_u32(flash->flash_node, "flash-max-microamp",
|
|
&cfg->flash_max_ua);
|
|
if (rval < 0) {
|
|
dev_err(&flash->client->dev,
|
|
"can't read flash-max-microamp property for flash\n");
|
|
goto out_err;
|
|
}
|
|
|
|
rval = of_property_read_u32(flash->flash_node, "led-max-microamp",
|
|
&cfg->assist_max_ua);
|
|
if (rval < 0) {
|
|
dev_err(&flash->client->dev,
|
|
"can't read led-max-microamp property for flash\n");
|
|
goto out_err;
|
|
}
|
|
|
|
of_property_read_u32(flash->flash_node, "voltage-reference",
|
|
&cfg->voltage_reference);
|
|
|
|
of_property_read_u32(flash->flash_node, "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 = of_property_read_string(flash->indicator_node, "label", &name);
|
|
if (!rval)
|
|
strlcpy(names->indicator, name, sizeof(names->indicator));
|
|
else
|
|
snprintf(names->indicator, sizeof(names->indicator),
|
|
"%pOFn:indicator", node);
|
|
|
|
rval = of_property_read_u32(flash->indicator_node, "led-max-microamp",
|
|
&cfg->indicator_max_ua);
|
|
if (rval < 0) {
|
|
dev_err(&flash->client->dev,
|
|
"can't read led-max-microamp property for indicator\n");
|
|
goto out_err;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_err:
|
|
of_node_put(flash->flash_node);
|
|
of_node_put(flash->indicator_node);
|
|
|
|
return rval;
|
|
}
|
|
|
|
static int as3645a_led_class_setup(struct as3645a *flash,
|
|
struct as3645a_names *names)
|
|
{
|
|
struct led_classdev *fled_cdev = &flash->fled.led_cdev;
|
|
struct led_classdev *iled_cdev = &flash->iled_cdev;
|
|
struct led_flash_setting *cfg;
|
|
int rval;
|
|
|
|
iled_cdev->name = names->indicator;
|
|
iled_cdev->brightness_set_blocking = as3645a_set_indicator_brightness;
|
|
iled_cdev->max_brightness =
|
|
flash->cfg.indicator_max_ua / AS_INDICATOR_INTENSITY_STEP;
|
|
iled_cdev->flags = LED_CORE_SUSPENDRESUME;
|
|
|
|
rval = led_classdev_register(&flash->client->dev, iled_cdev);
|
|
if (rval < 0)
|
|
return rval;
|
|
|
|
cfg = &flash->fled.brightness;
|
|
cfg->min = AS_FLASH_INTENSITY_MIN;
|
|
cfg->max = flash->cfg.flash_max_ua;
|
|
cfg->step = AS_FLASH_INTENSITY_STEP;
|
|
cfg->val = flash->cfg.flash_max_ua;
|
|
|
|
cfg = &flash->fled.timeout;
|
|
cfg->min = AS_FLASH_TIMEOUT_MIN;
|
|
cfg->max = flash->cfg.flash_timeout_us;
|
|
cfg->step = AS_FLASH_TIMEOUT_STEP;
|
|
cfg->val = flash->cfg.flash_timeout_us;
|
|
|
|
flash->fled.ops = &as3645a_led_flash_ops;
|
|
|
|
fled_cdev->name = names->flash;
|
|
fled_cdev->brightness_set_blocking = as3645a_set_assist_brightness;
|
|
/* Value 0 is off in LED class. */
|
|
fled_cdev->max_brightness =
|
|
as3645a_current_to_reg(flash, false,
|
|
flash->cfg.assist_max_ua) + 1;
|
|
fled_cdev->flags = LED_DEV_CAP_FLASH | LED_CORE_SUSPENDRESUME;
|
|
|
|
rval = led_classdev_flash_register(&flash->client->dev, &flash->fled);
|
|
if (rval) {
|
|
led_classdev_unregister(iled_cdev);
|
|
dev_err(&flash->client->dev,
|
|
"led_classdev_flash_register() failed, error %d\n",
|
|
rval);
|
|
}
|
|
|
|
return rval;
|
|
}
|
|
|
|
static int as3645a_v4l2_setup(struct as3645a *flash)
|
|
{
|
|
struct led_classdev_flash *fled = &flash->fled;
|
|
struct led_classdev *led = &fled->led_cdev;
|
|
struct v4l2_flash_config cfg = {
|
|
.intensity = {
|
|
.min = AS_TORCH_INTENSITY_MIN,
|
|
.max = flash->cfg.assist_max_ua,
|
|
.step = AS_TORCH_INTENSITY_STEP,
|
|
.val = flash->cfg.assist_max_ua,
|
|
},
|
|
};
|
|
struct v4l2_flash_config cfgind = {
|
|
.intensity = {
|
|
.min = AS_INDICATOR_INTENSITY_MIN,
|
|
.max = flash->cfg.indicator_max_ua,
|
|
.step = AS_INDICATOR_INTENSITY_STEP,
|
|
.val = flash->cfg.indicator_max_ua,
|
|
},
|
|
};
|
|
|
|
strlcpy(cfg.dev_name, led->name, sizeof(cfg.dev_name));
|
|
strlcpy(cfgind.dev_name, flash->iled_cdev.name, sizeof(cfg.dev_name));
|
|
|
|
flash->vf = v4l2_flash_init(
|
|
&flash->client->dev, of_fwnode_handle(flash->flash_node),
|
|
&flash->fled, NULL, &cfg);
|
|
if (IS_ERR(flash->vf))
|
|
return PTR_ERR(flash->vf);
|
|
|
|
flash->vfind = v4l2_flash_indicator_init(
|
|
&flash->client->dev, of_fwnode_handle(flash->indicator_node),
|
|
&flash->iled_cdev, &cfgind);
|
|
if (IS_ERR(flash->vfind)) {
|
|
v4l2_flash_release(flash->vf);
|
|
return PTR_ERR(flash->vfind);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int as3645a_probe(struct i2c_client *client)
|
|
{
|
|
struct as3645a_names names;
|
|
struct as3645a *flash;
|
|
int rval;
|
|
|
|
if (client->dev.of_node == NULL)
|
|
return -ENODEV;
|
|
|
|
flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL);
|
|
if (flash == NULL)
|
|
return -ENOMEM;
|
|
|
|
flash->client = client;
|
|
|
|
rval = as3645a_parse_node(flash, &names, client->dev.of_node);
|
|
if (rval < 0)
|
|
return rval;
|
|
|
|
rval = as3645a_detect(flash);
|
|
if (rval < 0)
|
|
goto out_put_nodes;
|
|
|
|
mutex_init(&flash->mutex);
|
|
i2c_set_clientdata(client, flash);
|
|
|
|
rval = as3645a_setup(flash);
|
|
if (rval)
|
|
goto out_mutex_destroy;
|
|
|
|
rval = as3645a_led_class_setup(flash, &names);
|
|
if (rval)
|
|
goto out_mutex_destroy;
|
|
|
|
rval = as3645a_v4l2_setup(flash);
|
|
if (rval)
|
|
goto out_led_classdev_flash_unregister;
|
|
|
|
return 0;
|
|
|
|
out_led_classdev_flash_unregister:
|
|
led_classdev_flash_unregister(&flash->fled);
|
|
|
|
out_mutex_destroy:
|
|
mutex_destroy(&flash->mutex);
|
|
|
|
out_put_nodes:
|
|
of_node_put(flash->flash_node);
|
|
of_node_put(flash->indicator_node);
|
|
|
|
return rval;
|
|
}
|
|
|
|
static int as3645a_remove(struct i2c_client *client)
|
|
{
|
|
struct as3645a *flash = i2c_get_clientdata(client);
|
|
|
|
as3645a_set_control(flash, AS_MODE_EXT_TORCH, false);
|
|
|
|
v4l2_flash_release(flash->vf);
|
|
v4l2_flash_release(flash->vfind);
|
|
|
|
led_classdev_flash_unregister(&flash->fled);
|
|
led_classdev_unregister(&flash->iled_cdev);
|
|
|
|
mutex_destroy(&flash->mutex);
|
|
|
|
of_node_put(flash->flash_node);
|
|
of_node_put(flash->indicator_node);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id as3645a_id_table[] = {
|
|
{ AS_NAME, 0 },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, as3645a_id_table);
|
|
|
|
static const struct of_device_id as3645a_of_table[] = {
|
|
{ .compatible = "ams,as3645a" },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, as3645a_of_table);
|
|
|
|
static struct i2c_driver as3645a_i2c_driver = {
|
|
.driver = {
|
|
.of_match_table = as3645a_of_table,
|
|
.name = AS_NAME,
|
|
},
|
|
.probe_new = as3645a_probe,
|
|
.remove = as3645a_remove,
|
|
.id_table = as3645a_id_table,
|
|
};
|
|
|
|
module_i2c_driver(as3645a_i2c_driver);
|
|
|
|
MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
|
|
MODULE_AUTHOR("Sakari Ailus <sakari.ailus@iki.fi>");
|
|
MODULE_DESCRIPTION("LED flash driver for AS3645A, LM3555 and their clones");
|
|
MODULE_LICENSE("GPL v2");
|