Commit f6e8fe94 authored by Sakari Ailus's avatar Sakari Ailus Committed by Mauro Carvalho Chehab
Browse files

media: i2c: as3645a: Remove driver 



Remove the V4L2 AS3645A sub-device driver in favour of the LED flash class
driver for the same hardware, drivers/leds/leds-as3645a.c. The latter uses
the V4L2 flash LED class framework to provide V4L2 sub-device interface.

Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: default avatarPavel Machek <pavel@ucw.cz>
Acked-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent 96b2979c

MAINTAINERS

+0 −8
Original line number Diff line number Diff line
@@ -2202,14 +2202,6 @@ L: linux-leds@vger.kernel.org 
S:	Maintained

F:	drivers/leds/leds-as3645a.c



AS3645A LED FLASH CONTROLLER DRIVER

M:	Laurent Pinchart <laurent.pinchart@ideasonboard.com>

L:	linux-media@vger.kernel.org

T:	git git://linuxtv.org/media_tree.git

S:	Maintained

F:	drivers/media/i2c/as3645a.c

F:	include/media/i2c/as3645a.h



ASAHI KASEI AK8974 DRIVER

M:	Linus Walleij <linus.walleij@linaro.org>

L:	linux-iio@vger.kernel.org

drivers/media/i2c/Kconfig

+0 −8
Original line number Diff line number Diff line
@@ -813,14 +813,6 @@ config VIDEO_ADP1653 
	  This is a driver for the ADP1653 flash controller. It is used for

	  example in Nokia N900.



config VIDEO_AS3645A

	tristate "AS3645A flash driver support"

	depends on I2C && VIDEO_V4L2 && MEDIA_CONTROLLER

	depends on MEDIA_CAMERA_SUPPORT

	---help---

	  This is a driver for the AS3645A and LM3555 flash controllers. It has

	  build in control for flash, torch and indicator LEDs.



config VIDEO_LM3560

	tristate "LM3560 dual flash driver support"

	depends on I2C && VIDEO_V4L2 && MEDIA_CONTROLLER

drivers/media/i2c/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -84,7 +84,6 @@ obj-$(CONFIG_VIDEO_S5K4ECGX) += s5k4ecgx.o 
obj-$(CONFIG_VIDEO_S5K5BAF)	+= s5k5baf.o

obj-$(CONFIG_VIDEO_S5C73M3)	+= s5c73m3/

obj-$(CONFIG_VIDEO_ADP1653)	+= adp1653.o

obj-$(CONFIG_VIDEO_AS3645A)	+= as3645a.o

obj-$(CONFIG_VIDEO_LM3560)	+= lm3560.o

obj-$(CONFIG_VIDEO_LM3646)	+= lm3646.o

obj-$(CONFIG_VIDEO_SMIAPP_PLL)	+= smiapp-pll.o

drivers/media/i2c/as3645a.c

deleted100644 → 0
+0 −880
Original line number Diff line number Diff line 
/*

 * drivers/media/i2c/as3645a.c - AS3645A and LM3555 flash controllers driver

 *

 * Copyright (C) 2008-2011 Nokia Corporation

 * Copyright (c) 2011, Intel Corporation.

 *

 * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

 *

 * 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.

 *

 * TODO:

 * - Check hardware FSTROBE control when sensor driver add support for this

 *

 */



#include <linux/delay.h>

#include <linux/i2c.h>

#include <linux/module.h>

#include <linux/mutex.h>

#include <linux/slab.h>



#include <media/i2c/as3645a.h>

#include <media/v4l2-ctrls.h>

#include <media/v4l2-device.h>



#define AS_TIMER_MS_TO_CODE(t)			(((t) - 100) / 50)

#define AS_TIMER_CODE_TO_MS(c)			(50 * (c) + 100)



/* 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



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

 *

 * @subdev:		V4L2 subdev

 * @pdata:		Flash platform data

 * @power_lock:		Protects power_count

 * @power_count:	Power reference count

 * @led_mode:		V4L2 flash LED mode

 * @timeout:		Flash timeout in microseconds

 * @flash_current:	Flash current (0=200mA ... 15=500mA). Maximum

 *			values are 400mA for two LEDs and 500mA for one LED.

 * @assist_current:	Torch/Assist light current (0=20mA, 1=40mA ... 7=160mA)

 * @indicator_current:	Indicator LED current (0=0mA, 1=2.5mA ... 4=10mA)

 * @strobe_source:	Flash strobe source (software or external)

 */

struct as3645a {

	struct v4l2_subdev subdev;

	const struct as3645a_platform_data *pdata;



	struct mutex power_lock;

	int power_count;



	/* Controls */

	struct v4l2_ctrl_handler ctrls;



	enum v4l2_flash_led_mode led_mode;

	unsigned int timeout;

	u8 flash_current;

	u8 assist_current;

	u8 indicator_current;

	enum v4l2_flash_strobe_source strobe_source;

};



#define to_as3645a(sd) container_of(sd, struct as3645a, subdev)



/* Return negative errno else zero on success */

static int as3645a_write(struct as3645a *flash, u8 addr, u8 val)

{

	struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev);

	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 = v4l2_get_subdevdata(&flash->subdev);

	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_config(struct as3645a *flash)

{

	int ret;

	u8 val;



	val = (flash->flash_current << AS_CURRENT_FLASH_CURRENT_SHIFT)

	    | (flash->assist_current << AS_CURRENT_ASSIST_LIGHT_SHIFT)

	    | AS_CURRENT_LED_DET_ON;



	ret = as3645a_write(flash, AS_CURRENT_SET_REG, val);

	if (ret < 0)

		return ret;



	val = AS_TIMER_MS_TO_CODE(flash->timeout / 1000)

		    << AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT;



	val |= (flash->pdata->vref << 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->pdata->peak << AS_CONTROL_COIL_PEAK_SHIFT)

	    | (on ? AS_CONTROL_OUT_ON : 0)

	    | mode;



	if (flash->led_mode == V4L2_FLASH_LED_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);

}



/*

 * as3645a_set_output - Configure output and operation mode

 * @flash: Flash controller

 * @strobe: Strobe the flash (only valid in flash mode)

 *

 * Turn the LEDs output on/off and set the operation mode based on the current

 * parameters.

 *

 * The AS3645A can't control the indicator LED independently of the flash/torch

 * LED. If the flash controller is in V4L2_FLASH_LED_MODE_NONE mode, set the

 * chip to indicator mode. Otherwise set it to assist light (torch) or flash

 * mode.

 *

 * In indicator and assist modes, turn the output on/off based on the indicator

 * and torch currents. In software strobe flash mode, turn the output on/off

 * based on the strobe parameter.

 */

static int as3645a_set_output(struct as3645a *flash, bool strobe)

{

	enum as_mode mode;

	bool on;



	switch (flash->led_mode) {

	case V4L2_FLASH_LED_MODE_NONE:

		on = flash->indicator_current != 0;

		mode = AS_MODE_INDICATOR;

		break;

	case V4L2_FLASH_LED_MODE_TORCH:

		on = true;

		mode = AS_MODE_ASSIST;

		break;

	case V4L2_FLASH_LED_MODE_FLASH:

		on = strobe;

		mode = AS_MODE_FLASH;

		break;

	default:

		BUG();

	}



	/* Configure output parameters and operation mode. */

	return as3645a_set_control(flash, mode, on);

}



/* -----------------------------------------------------------------------------

 * V4L2 controls

 */



static int as3645a_is_active(struct as3645a *flash)

{

	int ret;



	ret = as3645a_read(flash, AS_CONTROL_REG);

	return ret < 0 ? ret : !!(ret & AS_CONTROL_OUT_ON);

}



static int as3645a_read_fault(struct as3645a *flash)

{

	struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev);

	int rval;



	/* NOTE: reading register clear fault status */

	rval = as3645a_read(flash, AS_FAULT_INFO_REG);

	if (rval < 0)

		return rval;



	if (rval & AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT)

		dev_dbg(&client->dev, "Inductor Peak limit fault\n");



	if (rval & AS_FAULT_INFO_INDICATOR_LED)

		dev_dbg(&client->dev,

			"Indicator LED fault: Short circuit or open loop\n");



	dev_dbg(&client->dev, "%u connected LEDs\n",

		rval & AS_FAULT_INFO_LED_AMOUNT ? 2 : 1);



	if (rval & AS_FAULT_INFO_TIMEOUT)

		dev_dbg(&client->dev, "Timeout fault\n");



	if (rval & AS_FAULT_INFO_OVER_TEMPERATURE)

		dev_dbg(&client->dev, "Over temperature fault\n");



	if (rval & AS_FAULT_INFO_SHORT_CIRCUIT)

		dev_dbg(&client->dev, "Short circuit fault\n");



	if (rval & AS_FAULT_INFO_OVER_VOLTAGE)

		dev_dbg(&client->dev,

			"Over voltage fault: Indicates missing capacitor or open connection\n");



	return rval;

}



static int as3645a_get_ctrl(struct v4l2_ctrl *ctrl)

{

	struct as3645a *flash =

		container_of(ctrl->handler, struct as3645a, ctrls);

	struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev);

	int value;



	switch (ctrl->id) {

	case V4L2_CID_FLASH_FAULT:

		value = as3645a_read_fault(flash);

		if (value < 0)

			return value;



		ctrl->cur.val = 0;

		if (value & AS_FAULT_INFO_SHORT_CIRCUIT)

			ctrl->cur.val |= V4L2_FLASH_FAULT_SHORT_CIRCUIT;

		if (value & AS_FAULT_INFO_OVER_TEMPERATURE)

			ctrl->cur.val |= V4L2_FLASH_FAULT_OVER_TEMPERATURE;

		if (value & AS_FAULT_INFO_TIMEOUT)

			ctrl->cur.val |= V4L2_FLASH_FAULT_TIMEOUT;

		if (value & AS_FAULT_INFO_OVER_VOLTAGE)

			ctrl->cur.val |= V4L2_FLASH_FAULT_OVER_VOLTAGE;

		if (value & AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT)

			ctrl->cur.val |= V4L2_FLASH_FAULT_OVER_CURRENT;

		if (value & AS_FAULT_INFO_INDICATOR_LED)

			ctrl->cur.val |= V4L2_FLASH_FAULT_INDICATOR;

		break;



	case V4L2_CID_FLASH_STROBE_STATUS:

		if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH) {

			ctrl->cur.val = 0;

			break;

		}



		value = as3645a_is_active(flash);

		if (value < 0)

			return value;



		ctrl->cur.val = value;

		break;

	}



	dev_dbg(&client->dev, "G_CTRL %08x:%d\n", ctrl->id, ctrl->cur.val);



	return 0;

}



static int as3645a_set_ctrl(struct v4l2_ctrl *ctrl)

{

	struct as3645a *flash =

		container_of(ctrl->handler, struct as3645a, ctrls);

	struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev);

	int ret;



	dev_dbg(&client->dev, "S_CTRL %08x:%d\n", ctrl->id, ctrl->val);



	/* If a control that doesn't apply to the current mode is modified,

	 * we store the value and return immediately. The setting will be

	 * applied when the LED mode is changed. Otherwise we apply the setting

	 * immediately.

	 */



	switch (ctrl->id) {

	case V4L2_CID_FLASH_LED_MODE:

		if (flash->indicator_current)

			return -EBUSY;



		ret = as3645a_set_config(flash);

		if (ret < 0)

			return ret;



		flash->led_mode = ctrl->val;

		return as3645a_set_output(flash, false);



	case V4L2_CID_FLASH_STROBE_SOURCE:

		flash->strobe_source = ctrl->val;



		/* Applies to flash mode only. */

		if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH)

			break;



		return as3645a_set_output(flash, false);



	case V4L2_CID_FLASH_STROBE:

		if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH)

			return -EBUSY;



		return as3645a_set_output(flash, true);



	case V4L2_CID_FLASH_STROBE_STOP:

		if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH)

			return -EBUSY;



		return as3645a_set_output(flash, false);



	case V4L2_CID_FLASH_TIMEOUT:

		flash->timeout = ctrl->val;



		/* Applies to flash mode only. */

		if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH)

			break;



		return as3645a_set_config(flash);



	case V4L2_CID_FLASH_INTENSITY:

		flash->flash_current = (ctrl->val - AS3645A_FLASH_INTENSITY_MIN)

				     / AS3645A_FLASH_INTENSITY_STEP;



		/* Applies to flash mode only. */

		if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH)

			break;



		return as3645a_set_config(flash);



	case V4L2_CID_FLASH_TORCH_INTENSITY:

		flash->assist_current =

			(ctrl->val - AS3645A_TORCH_INTENSITY_MIN)

			/ AS3645A_TORCH_INTENSITY_STEP;



		/* Applies to torch mode only. */

		if (flash->led_mode != V4L2_FLASH_LED_MODE_TORCH)

			break;



		return as3645a_set_config(flash);



	case V4L2_CID_FLASH_INDICATOR_INTENSITY:

		if (flash->led_mode != V4L2_FLASH_LED_MODE_NONE)

			return -EBUSY;



		flash->indicator_current =

			(ctrl->val - AS3645A_INDICATOR_INTENSITY_MIN)

			/ AS3645A_INDICATOR_INTENSITY_STEP;



		ret = as3645a_set_config(flash);

		if (ret < 0)

			return ret;



		if ((ctrl->val == 0) == (ctrl->cur.val == 0))

			break;



		return as3645a_set_output(flash, false);

	}



	return 0;

}



static const struct v4l2_ctrl_ops as3645a_ctrl_ops = {

	.g_volatile_ctrl = as3645a_get_ctrl,

	.s_ctrl = as3645a_set_ctrl,

};



/* -----------------------------------------------------------------------------

 * V4L2 subdev core operations

 */



/* Put device into know state. */

static int as3645a_setup(struct as3645a *flash)

{

	struct i2c_client *client = v4l2_get_subdevdata(&flash->subdev);

	int ret;



	/* clear errors */

	ret = as3645a_read(flash, AS_FAULT_INFO_REG);

	if (ret < 0)

		return ret;



	dev_dbg(&client->dev, "Fault info: %02x\n", ret);



	ret = as3645a_set_config(flash);

	if (ret < 0)

		return ret;



	ret = as3645a_set_output(flash, false);

	if (ret < 0)

		return ret;



	/* read status */

	ret = as3645a_read_fault(flash);

	if (ret < 0)

		return ret;



	dev_dbg(&client->dev, "AS_INDICATOR_AND_TIMER_REG: %02x\n",

		as3645a_read(flash, AS_INDICATOR_AND_TIMER_REG));

	dev_dbg(&client->dev, "AS_CURRENT_SET_REG: %02x\n",

		as3645a_read(flash, AS_CURRENT_SET_REG));

	dev_dbg(&client->dev, "AS_CONTROL_REG: %02x\n",

		as3645a_read(flash, AS_CONTROL_REG));



	return ret & ~AS_FAULT_INFO_LED_AMOUNT ? -EIO : 0;

}



static int __as3645a_set_power(struct as3645a *flash, int on)

{

	int ret;



	if (!on)

		as3645a_set_control(flash, AS_MODE_EXT_TORCH, false);



	if (flash->pdata->set_power) {

		ret = flash->pdata->set_power(&flash->subdev, on);

		if (ret < 0)

			return ret;

	}



	if (!on)

		return 0;



	ret = as3645a_setup(flash);

	if (ret < 0) {

		if (flash->pdata->set_power)

			flash->pdata->set_power(&flash->subdev, 0);

	}



	return ret;

}



static int as3645a_set_power(struct v4l2_subdev *sd, int on)

{

	struct as3645a *flash = to_as3645a(sd);

	int ret = 0;



	mutex_lock(&flash->power_lock);



	if (flash->power_count == !on) {

		ret = __as3645a_set_power(flash, !!on);

		if (ret < 0)

			goto done;

	}



	flash->power_count += on ? 1 : -1;

	WARN_ON(flash->power_count < 0);



done:

	mutex_unlock(&flash->power_lock);

	return ret;

}



static int as3645a_registered(struct v4l2_subdev *sd)

{

	struct as3645a *flash = to_as3645a(sd);

	struct i2c_client *client = v4l2_get_subdevdata(sd);

	int rval, man, model, rfu, version;

	const char *vendor;



	/* Power up the flash driver and read manufacturer ID, model ID, RFU

	 * and version.

	 */

	rval = as3645a_set_power(&flash->subdev, 1);

	if (rval < 0)

		return rval;



	rval = as3645a_read(flash, AS_DESIGN_INFO_REG);

	if (rval < 0)

		goto power_off;



	man = AS_DESIGN_INFO_FACTORY(rval);

	model = AS_DESIGN_INFO_MODEL(rval);



	rval = as3645a_read(flash, AS_VERSION_CONTROL_REG);

	if (rval < 0)

		goto power_off;



	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(&client->dev,

			"AS3645A not detected (model %d rfu %d)\n", model, rfu);

		rval = -ENODEV;

		goto power_off;

	}



	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(&client->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)

		goto power_off;



	rval = as3645a_write(flash, AS_BOOST_REG, AS_BOOST_CURRENT_DISABLE);

	if (rval < 0)

		goto power_off;



	/* Setup default values. This makes sure that the chip is in a known

	 * state, in case the power rail can't be controlled.

	 */

	rval = as3645a_setup(flash);



power_off:

	as3645a_set_power(&flash->subdev, 0);



	return rval;

}



static int as3645a_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)

{

	return as3645a_set_power(sd, 1);

}



static int as3645a_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)

{

	return as3645a_set_power(sd, 0);

}



static const struct v4l2_subdev_core_ops as3645a_core_ops = {

	.s_power		= as3645a_set_power,

};



static const struct v4l2_subdev_ops as3645a_ops = {

	.core = &as3645a_core_ops,

};



static const struct v4l2_subdev_internal_ops as3645a_internal_ops = {

	.registered = as3645a_registered,

	.open = as3645a_open,

	.close = as3645a_close,

};



/* -----------------------------------------------------------------------------

 *  I2C driver

 */

#ifdef CONFIG_PM



static int as3645a_suspend(struct device *dev)

{

	struct i2c_client *client = to_i2c_client(dev);

	struct v4l2_subdev *subdev = i2c_get_clientdata(client);

	struct as3645a *flash = to_as3645a(subdev);

	int rval;



	if (flash->power_count == 0)

		return 0;



	rval = __as3645a_set_power(flash, 0);



	dev_dbg(&client->dev, "Suspend %s\n", rval < 0 ? "failed" : "ok");



	return rval;

}



static int as3645a_resume(struct device *dev)

{

	struct i2c_client *client = to_i2c_client(dev);

	struct v4l2_subdev *subdev = i2c_get_clientdata(client);

	struct as3645a *flash = to_as3645a(subdev);

	int rval;



	if (flash->power_count == 0)

		return 0;



	rval = __as3645a_set_power(flash, 1);



	dev_dbg(&client->dev, "Resume %s\n", rval < 0 ? "fail" : "ok");



	return rval;

}



#else



#define as3645a_suspend	NULL

#define as3645a_resume	NULL



#endif /* CONFIG_PM */



/*

 * as3645a_init_controls - Create controls

 * @flash: The flash

 *

 * The number of LEDs reported in platform data is used to compute default

 * limits. Parameters passed through platform data can override those limits.

 */

static int as3645a_init_controls(struct as3645a *flash)

{

	const struct as3645a_platform_data *pdata = flash->pdata;

	struct v4l2_ctrl *ctrl;

	int maximum;



	v4l2_ctrl_handler_init(&flash->ctrls, 10);



	/* V4L2_CID_FLASH_LED_MODE */

	v4l2_ctrl_new_std_menu(&flash->ctrls, &as3645a_ctrl_ops,

			       V4L2_CID_FLASH_LED_MODE, 2, ~7,

			       V4L2_FLASH_LED_MODE_NONE);



	/* V4L2_CID_FLASH_STROBE_SOURCE */

	v4l2_ctrl_new_std_menu(&flash->ctrls, &as3645a_ctrl_ops,

			       V4L2_CID_FLASH_STROBE_SOURCE,

			       pdata->ext_strobe ? 1 : 0,

			       pdata->ext_strobe ? ~3 : ~1,

			       V4L2_FLASH_STROBE_SOURCE_SOFTWARE);



	flash->strobe_source = V4L2_FLASH_STROBE_SOURCE_SOFTWARE;



	/* V4L2_CID_FLASH_STROBE */

	v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops,

			  V4L2_CID_FLASH_STROBE, 0, 0, 0, 0);



	/* V4L2_CID_FLASH_STROBE_STOP */

	v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops,

			  V4L2_CID_FLASH_STROBE_STOP, 0, 0, 0, 0);



	/* V4L2_CID_FLASH_STROBE_STATUS */

	ctrl = v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops,

				 V4L2_CID_FLASH_STROBE_STATUS, 0, 1, 1, 1);

	if (ctrl != NULL)

		ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;



	/* V4L2_CID_FLASH_TIMEOUT */

	maximum = pdata->timeout_max;



	v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops,

			  V4L2_CID_FLASH_TIMEOUT, AS3645A_FLASH_TIMEOUT_MIN,

			  maximum, AS3645A_FLASH_TIMEOUT_STEP, maximum);



	flash->timeout = maximum;



	/* V4L2_CID_FLASH_INTENSITY */

	maximum = pdata->flash_max_current;



	v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops,

			  V4L2_CID_FLASH_INTENSITY, AS3645A_FLASH_INTENSITY_MIN,

			  maximum, AS3645A_FLASH_INTENSITY_STEP, maximum);



	flash->flash_current = (maximum - AS3645A_FLASH_INTENSITY_MIN)

			     / AS3645A_FLASH_INTENSITY_STEP;



	/* V4L2_CID_FLASH_TORCH_INTENSITY */

	maximum = pdata->torch_max_current;



	v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops,

			  V4L2_CID_FLASH_TORCH_INTENSITY,

			  AS3645A_TORCH_INTENSITY_MIN, maximum,

			  AS3645A_TORCH_INTENSITY_STEP,

			  AS3645A_TORCH_INTENSITY_MIN);



	flash->assist_current = 0;



	/* V4L2_CID_FLASH_INDICATOR_INTENSITY */

	v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops,

			  V4L2_CID_FLASH_INDICATOR_INTENSITY,

			  AS3645A_INDICATOR_INTENSITY_MIN,

			  AS3645A_INDICATOR_INTENSITY_MAX,

			  AS3645A_INDICATOR_INTENSITY_STEP,

			  AS3645A_INDICATOR_INTENSITY_MIN);



	flash->indicator_current = 0;



	/* V4L2_CID_FLASH_FAULT */

	ctrl = v4l2_ctrl_new_std(&flash->ctrls, &as3645a_ctrl_ops,

				 V4L2_CID_FLASH_FAULT, 0,

				 V4L2_FLASH_FAULT_OVER_VOLTAGE |

				 V4L2_FLASH_FAULT_TIMEOUT |

				 V4L2_FLASH_FAULT_OVER_TEMPERATURE |

				 V4L2_FLASH_FAULT_SHORT_CIRCUIT, 0, 0);

	if (ctrl != NULL)

		ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;



	flash->subdev.ctrl_handler = &flash->ctrls;



	return flash->ctrls.error;

}



static int as3645a_probe(struct i2c_client *client,

			 const struct i2c_device_id *devid)

{

	struct as3645a *flash;

	int ret;



	if (client->dev.platform_data == NULL)

		return -ENODEV;



	flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL);

	if (flash == NULL)

		return -ENOMEM;



	flash->pdata = client->dev.platform_data;



	v4l2_i2c_subdev_init(&flash->subdev, client, &as3645a_ops);

	flash->subdev.internal_ops = &as3645a_internal_ops;

	flash->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;



	ret = as3645a_init_controls(flash);

	if (ret < 0)

		goto done;



	ret = media_entity_pads_init(&flash->subdev.entity, 0, NULL);

	if (ret < 0)

		goto done;



	flash->subdev.entity.function = MEDIA_ENT_F_FLASH;



	mutex_init(&flash->power_lock);



	flash->led_mode = V4L2_FLASH_LED_MODE_NONE;



done:

	if (ret < 0)

		v4l2_ctrl_handler_free(&flash->ctrls);



	return ret;

}



static int as3645a_remove(struct i2c_client *client)

{

	struct v4l2_subdev *subdev = i2c_get_clientdata(client);

	struct as3645a *flash = to_as3645a(subdev);



	v4l2_device_unregister_subdev(subdev);

	v4l2_ctrl_handler_free(&flash->ctrls);

	media_entity_cleanup(&flash->subdev.entity);

	mutex_destroy(&flash->power_lock);



	return 0;

}



static const struct i2c_device_id as3645a_id_table[] = {

	{ AS3645A_NAME, 0 },

	{ },

};

MODULE_DEVICE_TABLE(i2c, as3645a_id_table);



static const struct dev_pm_ops as3645a_pm_ops = {

	.suspend = as3645a_suspend,

	.resume = as3645a_resume,

};



static struct i2c_driver as3645a_i2c_driver = {

	.driver	= {

		.name = AS3645A_NAME,

		.pm   = &as3645a_pm_ops,

	},

	.probe	= 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_DESCRIPTION("LED flash driver for AS3645A, LM3555 and their clones");

MODULE_LICENSE("GPL");

include/media/i2c/as3645a.h

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