Re: [RFC v6,3/3] media: i2c: add new dual LED Flash driver, lm364

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Hi Daniel,

Just a few minor comments.

On Wed, Feb 26, 2014 at 04:04:11PM +0900, Daniel Jeong wrote:
>  This patch adds the driver for the LM3646, dual LED Flash driver.
> The LM3646 has two 1.5A sync. boost converter with dual white current source.
> It is controlled via an I2C compatible interface.
> Each flash brightness, torch brightness and enable/disable can be controlled.
> Under voltage, input voltage monitor and thermal threshhold Faults are added.
> Please refer the datasheet http://www.ti.com/lit/ds/snvs962/snvs962.pdf
> 
> Signed-off-by: Daniel Jeong <gshark.jeong@xxxxxxxxx>
> ---
>  drivers/media/i2c/Kconfig  |    9 +
>  drivers/media/i2c/Makefile |    1 +
>  drivers/media/i2c/lm3646.c |  419 ++++++++++++++++++++++++++++++++++++++++++++
>  include/media/lm3646.h     |   87 +++++++++
>  4 files changed, 516 insertions(+)
>  create mode 100644 drivers/media/i2c/lm3646.c
>  create mode 100644 include/media/lm3646.h
> 
> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> index 4aa9c53..c7f2823 100644
> --- a/drivers/media/i2c/Kconfig
> +++ b/drivers/media/i2c/Kconfig
> @@ -629,6 +629,15 @@ config VIDEO_LM3560
>  	  This is a driver for the lm3560 dual flash controllers. It controls
>  	  flash, torch LEDs.
>  
> +config VIDEO_LM3646
> +	tristate "LM3646 dual flash driver support"
> +	depends on I2C && VIDEO_V4L2 && MEDIA_CONTROLLER
> +	depends on MEDIA_CAMERA_SUPPORT
> +	select REGMAP_I2C
> +	---help---
> +	  This is a driver for the lm3646 dual flash controllers. It controls
> +	  flash, torch LEDs.
> +
>  comment "Video improvement chips"
>  
>  config VIDEO_UPD64031A
> diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
> index 48888ae..01b6bfc 100644
> --- a/drivers/media/i2c/Makefile
> +++ b/drivers/media/i2c/Makefile
> @@ -72,6 +72,7 @@ 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
>  obj-$(CONFIG_VIDEO_AK881X)		+= ak881x.o
>  obj-$(CONFIG_VIDEO_IR_I2C)  += ir-kbd-i2c.o
> diff --git a/drivers/media/i2c/lm3646.c b/drivers/media/i2c/lm3646.c
> new file mode 100644
> index 0000000..97d79a7
> --- /dev/null
> +++ b/drivers/media/i2c/lm3646.c
> @@ -0,0 +1,419 @@
> +/*
> + * drivers/media/i2c/lm3646.c
> + * General device driver for TI lm3646, Dual FLASH LED Driver
> + *
> + * Copyright (C) 2014 Texas Instruments
> + *
> + * Contact: Daniel Jeong <gshark.jeong@xxxxxxxxx>
> + *			Ldd-Mlp <ldd-mlp@xxxxxxxxxxx>
> + *
> + * 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.
> + */
> +
> +#include <linux/delay.h>
> +#include <linux/module.h>
> +#include <linux/i2c.h>

Alphabetical order.

> +#include <linux/slab.h>
> +#include <linux/regmap.h>
> +#include <linux/videodev2.h>
> +#include <media/lm3646.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-device.h>
> +
> +/* registers definitions */
> +#define REG_ENABLE		0x01
> +#define REG_TORCH_BR	0x05
> +#define REG_FLASH_BR	0x05
> +#define REG_FLASH_TOUT	0x04
> +#define REG_FLAG		0x08
> +#define REG_STROBE_SRC	0x06
> +#define REG_LED1_FLASH_BR 0x06
> +#define REG_LED1_TORCH_BR 0x07
> +
> +#define MASK_ENABLE		0x03
> +#define MASK_TORCH_BR	0x70
> +#define MASK_FLASH_BR	0x0F
> +#define MASK_FLASH_TOUT	0x07
> +#define MASK_FLAG		0xFF
> +#define MASK_STROBE_SRC	0x80
> +
> +/* Fault Mask */
> +#define FAULT_TIMEOUT	(1<<0)
> +#define FAULT_SHORT_CIRCUIT	(1<<1)
> +#define FAULT_UVLO		(1<<2)
> +#define FAULT_IVFM		(1<<3)
> +#define FAULT_OCP		(1<<4)
> +#define FAULT_OVERTEMP	(1<<5)
> +#define FAULT_NTC_TRIP	(1<<6)
> +#define FAULT_OVP		(1<<7)
> +
> +enum led_mode {
> +	MODE_SHDN = 0x0,
> +	MODE_TORCH = 0x2,
> +	MODE_FLASH = 0x3,
> +};
> +
> +/*
> + * struct lm3646_flash
> + *
> + * @pdata: platform data
> + * @regmap: reg. map for i2c
> + * @lock: muxtex for serial access.
> + * @led_mode: V4L2 LED mode
> + * @ctrls_led: V4L2 contols
> + * @subdev_led: V4L2 subdev
> + * @mode_reg : mode register value
> + */
> +struct lm3646_flash {
> +	struct device *dev;
> +	struct lm3646_platform_data *pdata;
> +	struct regmap *regmap;
> +
> +	struct v4l2_ctrl_handler ctrls_led;
> +	struct v4l2_subdev subdev_led;
> +
> +	u8 mode_reg;
> +};
> +
> +#define to_lm3646_flash(_ctrl)	\
> +	container_of(_ctrl->handler, struct lm3646_flash, ctrls_led)
> +
> +/* enable mode control */
> +static int lm3646_mode_ctrl(struct lm3646_flash *flash,
> +			    enum v4l2_flash_led_mode led_mode)
> +{
> +	int rval = -EINVAL;
> +
> +	switch (led_mode) {
> +	case V4L2_FLASH_LED_MODE_NONE:
> +		rval = regmap_write(flash->regmap,
> +				    REG_ENABLE, flash->mode_reg | MODE_SHDN);

You could return here, and remove rval altogerher, as you do in
lm3646_set_ctrl().

> +		break;
> +	case V4L2_FLASH_LED_MODE_TORCH:
> +		rval = regmap_write(flash->regmap,
> +				    REG_ENABLE, flash->mode_reg | MODE_TORCH);
> +		break;
> +	case V4L2_FLASH_LED_MODE_FLASH:
> +		rval = regmap_write(flash->regmap,
> +				    REG_ENABLE, flash->mode_reg | MODE_FLASH);
> +		break;
> +	}
> +	return rval;
> +}
> +
> +/* V4L2 controls  */
> +static int lm3646_get_ctrl(struct v4l2_ctrl *ctrl)
> +{
> +	struct lm3646_flash *flash = to_lm3646_flash(ctrl);
> +	int rval = -EINVAL;
> +
> +	if (ctrl->id == V4L2_CID_FLASH_FAULT) {

I'd either remove the check altogether (there's a single volatile control)
or return an error if it fails.

> +		s32 fault = 0;
> +		unsigned int reg_val;
> +		rval = regmap_read(flash->regmap, REG_FLAG, &reg_val);
> +		if (rval < 0)
> +			return rval;
> +
> +		if (reg_val & FAULT_TIMEOUT)
> +			fault |= V4L2_FLASH_FAULT_TIMEOUT;

You can also use ctrl->val directly and remove "fault". Up to you.

> +		if (reg_val & FAULT_SHORT_CIRCUIT)
> +			fault |= V4L2_FLASH_FAULT_SHORT_CIRCUIT;
> +		if (reg_val & FAULT_UVLO)
> +			fault |= V4L2_FLASH_FAULT_UNDER_VOLTAGE;
> +		if (reg_val & FAULT_IVFM)
> +			fault |= V4L2_FLASH_FAULT_INPUT_VOLTAGE;
> +		if (reg_val & FAULT_OCP)
> +			fault |= V4L2_FLASH_FAULT_OVER_CURRENT;
> +		if (reg_val & FAULT_OVERTEMP)
> +			fault |= V4L2_FLASH_FAULT_OVER_TEMPERATURE;
> +		if (reg_val & FAULT_NTC_TRIP)
> +			fault |= V4L2_FLASH_FAULT_LED_OVER_TEMPERATURE;
> +		if (reg_val & FAULT_OVP)
> +			fault |= V4L2_FLASH_FAULT_OVER_VOLTAGE;
> +
> +		ctrl->val = fault;
> +	}
> +
> +	return rval;
> +}
> +
> +static int lm3646_set_ctrl(struct v4l2_ctrl *ctrl)
> +{
> +	struct lm3646_flash *flash = to_lm3646_flash(ctrl);
> +	unsigned int reg_val;
> +	int rval = -EINVAL;
> +
> +	switch (ctrl->id) {
> +	case V4L2_CID_FLASH_LED_MODE:
> +
> +		if (ctrl->val != V4L2_FLASH_LED_MODE_FLASH)
> +			return lm3646_mode_ctrl(flash, ctrl->val);
> +		/* switch to SHDN mode before flash strobe on */
> +		return lm3646_mode_ctrl(flash, V4L2_FLASH_LED_MODE_NONE);
> +
> +	case V4L2_CID_FLASH_STROBE_SOURCE:
> +		return regmap_update_bits(flash->regmap,
> +					  REG_STROBE_SRC, MASK_STROBE_SRC,
> +					  (ctrl->val) << 7);
> +
> +	case V4L2_CID_FLASH_STROBE:
> +
> +		/* read and check current mode of chip to start flash */
> +		rval = regmap_read(flash->regmap, REG_ENABLE, &reg_val);
> +		if (rval < 0 || ((reg_val & MASK_ENABLE) != MODE_SHDN))
> +			return rval;
> +		/* flash on */
> +		return lm3646_mode_ctrl(flash, V4L2_FLASH_LED_MODE_FLASH);
> +
> +	case V4L2_CID_FLASH_STROBE_STOP:
> +
> +		/*
> +		 * flash mode will be turned automatically
> +		 * from FLASH mode to SHDN mode after flash duration timeout
> +		 * read and check current mode of chip to stop flash
> +		 */
> +		rval = regmap_read(flash->regmap, REG_ENABLE, &reg_val);
> +		if (rval < 0)
> +			return rval;
> +		if ((reg_val & MASK_ENABLE) == MODE_FLASH)
> +			return lm3646_mode_ctrl(flash,
> +						V4L2_FLASH_LED_MODE_NONE);
> +		return rval;
> +
> +	case V4L2_CID_FLASH_TIMEOUT:
> +		return regmap_update_bits(flash->regmap,
> +					  REG_FLASH_TOUT, MASK_FLASH_TOUT,
> +					  LM3646_FLASH_TOUT_ms_TO_REG
> +					  (ctrl->val));
> +
> +	case V4L2_CID_FLASH_INTENSITY:
> +		return regmap_update_bits(flash->regmap,
> +					  REG_FLASH_BR, MASK_FLASH_BR,
> +					  LM3646_TOTAL_FLASH_BRT_uA_TO_REG
> +					  (ctrl->val));
> +
> +	case V4L2_CID_FLASH_TORCH_INTENSITY:
> +		reg_val = LM3646_TOTAL_TORCH_BRT_uA_TO_REG(ctrl->val);
> +		return regmap_update_bits(flash->regmap,
> +					  REG_TORCH_BR, MASK_TORCH_BR,
> +					  LM3646_TOTAL_TORCH_BRT_uA_TO_REG
> +					  (ctrl->val) << 4);
> +	}
> +
> +	return -EINVAL;
> +}
> +
> +static const struct v4l2_ctrl_ops lm3646_led_ctrl_ops = {
> +	.g_volatile_ctrl = lm3646_get_ctrl,
> +	.s_ctrl = lm3646_set_ctrl,
> +};
> +
> +static int lm3646_init_controls(struct lm3646_flash *flash)
> +{
> +	struct v4l2_ctrl *fault;
> +	struct v4l2_ctrl_handler *hdl = &flash->ctrls_led;
> +	const struct v4l2_ctrl_ops *ops = &lm3646_led_ctrl_ops;
> +
> +	v4l2_ctrl_handler_init(hdl, 8);
> +	/* flash mode */
> +	v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_FLASH_LED_MODE,
> +			       V4L2_FLASH_LED_MODE_TORCH, ~0x7,
> +			       V4L2_FLASH_LED_MODE_NONE);
> +
> +	/* flash source */
> +	v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_FLASH_STROBE_SOURCE,
> +			       0x1, ~0x3, V4L2_FLASH_STROBE_SOURCE_SOFTWARE);
> +
> +	/* flash strobe */
> +	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_STROBE, 0, 0, 0, 0);
> +	/* flash strobe stop */
> +	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_STROBE_STOP, 0, 0, 0, 0);
> +
> +	/* flash strobe timeout */
> +	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_TIMEOUT,
> +			  LM3646_FLASH_TOUT_MIN,
> +			  LM3646_FLASH_TOUT_MAX,
> +			  LM3646_FLASH_TOUT_STEP, flash->pdata->flash_timeout);
> +
> +	/* max flash current */
> +	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_INTENSITY,
> +			  LM3646_TOTAL_FLASH_BRT_MIN,
> +			  LM3646_TOTAL_FLASH_BRT_MAX,
> +			  LM3646_TOTAL_FLASH_BRT_STEP,
> +			  LM3646_TOTAL_FLASH_BRT_MAX);
> +
> +	/* max torch current */
> +	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_TORCH_INTENSITY,
> +			  LM3646_TOTAL_TORCH_BRT_MIN,
> +			  LM3646_TOTAL_TORCH_BRT_MAX,
> +			  LM3646_TOTAL_TORCH_BRT_STEP,
> +			  LM3646_TOTAL_TORCH_BRT_MAX);
> +
> +	/* fault */
> +	fault = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_FAULT, 0,
> +				  V4L2_FLASH_FAULT_OVER_VOLTAGE
> +				  | V4L2_FLASH_FAULT_OVER_TEMPERATURE
> +				  | V4L2_FLASH_FAULT_SHORT_CIRCUIT
> +				  | V4L2_FLASH_FAULT_TIMEOUT, 0, 0);
> +	if (fault != NULL)
> +		fault->flags |= V4L2_CTRL_FLAG_VOLATILE;
> +
> +	if (hdl->error)
> +		return hdl->error;
> +
> +	flash->subdev_led.ctrl_handler = hdl;
> +	return 0;
> +}
> +
> +/* initialize device */
> +static const struct v4l2_subdev_ops lm3646_ops = {
> +	.core = NULL,
> +};
> +
> +static const struct regmap_config lm3646_regmap = {
> +	.reg_bits = 8,
> +	.val_bits = 8,
> +	.max_register = 0xFF,
> +};
> +
> +static int lm3646_subdev_init(struct lm3646_flash *flash)
> +{
> +	struct i2c_client *client = to_i2c_client(flash->dev);
> +	int rval;
> +
> +	v4l2_i2c_subdev_init(&flash->subdev_led, client, &lm3646_ops);
> +	flash->subdev_led.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
> +	strcpy(flash->subdev_led.name, LM3646_NAME);
> +	rval = lm3646_init_controls(flash);
> +	if (rval)
> +		goto err_out;
> +	rval = media_entity_init(&flash->subdev_led.entity, 0, NULL, 0);
> +	if (rval < 0)
> +		goto err_out;
> +	flash->subdev_led.entity.type = MEDIA_ENT_T_V4L2_SUBDEV_FLASH;
> +	return rval;
> +
> +err_out:
> +	v4l2_ctrl_handler_free(&flash->ctrls_led);
> +	return rval;
> +}
> +
> +static int lm3646_init_device(struct lm3646_flash *flash)
> +{
> +	unsigned int reg_val;
> +	int rval;
> +
> +	/* read the value of mode register to reduce redundant i2c accesses */
> +	rval = regmap_read(flash->regmap, REG_ENABLE, &reg_val);
> +	if (rval < 0)
> +		return rval;
> +	flash->mode_reg = reg_val & 0xfc;
> +
> +	/* output disable */
> +	rval = lm3646_mode_ctrl(flash, V4L2_FLASH_LED_MODE_NONE);
> +	if (rval < 0)
> +		return rval;
> +
> +	/*
> +	 * LED1 flash current setting
> +	 * LED2 flash current = Total(Max) flash current - LED1 flash current
> +	 */
> +	rval = regmap_update_bits(flash->regmap, REG_LED1_FLASH_BR, 0x7F,
> +				  LM3646_LED1_FLASH_BRT_uA_TO_REG(flash->pdata->
> +								  led1_flash_brt));

Over 80 characters per line. How about e.g.:

	rval = regmap_update_bits(
		flash->regmap, REG_LED1_FLASH_BR, 0x7F,
		LM3646_LED1_FLASH_BRT_uA_TO_REG(flash->pdata->led1_flash_brt));

Same below.

A question related to the currents on the two leds --- there's currently no
way to control the current to the LEDs individually, right? I'm not too
worried if that's the case; it can be changed later on.

> +	if (rval < 0)
> +		return rval;
> +
> +	/*
> +	 * LED1 torch current setting
> +	 * LED2 torch current = Total(Max) torch current - LED1 torch current
> +	 */
> +	rval = regmap_update_bits(flash->regmap, REG_LED1_TORCH_BR, 0x7F,
> +				  LM3646_LED1_TORCH_BRT_uA_TO_REG(flash->pdata->
> +								  led1_torch_brt));
> +	if (rval < 0)
> +		return rval;
> +
> +	/* Reset flag register */
> +	return regmap_read(flash->regmap, REG_FLAG, &reg_val);
> +

Extra empty line here.

> +}
> +
> +static int lm3646_probe(struct i2c_client *client,
> +			const struct i2c_device_id *devid)
> +{
> +	struct lm3646_flash *flash;
> +	struct lm3646_platform_data *pdata = dev_get_platdata(&client->dev);
> +	int rval;
> +
> +	flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL);
> +	if (flash == NULL)
> +		return -ENOMEM;
> +
> +	flash->regmap = devm_regmap_init_i2c(client, &lm3646_regmap);
> +	if (IS_ERR(flash->regmap))
> +		return PTR_ERR(flash->regmap);
> +
> +	/* check device tree if there is no platform data */
> +	if (pdata == NULL) {
> +		pdata = devm_kzalloc(&client->dev,
> +				     sizeof(struct lm3646_platform_data),
> +				     GFP_KERNEL);
> +		if (pdata == NULL)
> +			return -ENOMEM;
> +		/* use default data in case of no platform data */
> +		pdata->flash_timeout = LM3646_FLASH_TOUT_MAX;
> +		pdata->led1_torch_brt = LM3646_LED1_TORCH_BRT_MAX;
> +		pdata->led1_flash_brt = LM3646_LED1_FLASH_BRT_MAX;
> +	}
> +	flash->pdata = pdata;
> +	flash->dev = &client->dev;
> +
> +	rval = lm3646_subdev_init(flash);
> +	if (rval < 0)
> +		return rval;
> +
> +	rval = lm3646_init_device(flash);
> +	if (rval < 0)
> +		return rval;
> +
> +	i2c_set_clientdata(client, flash);
> +
> +	return 0;
> +}
> +
> +static int lm3646_remove(struct i2c_client *client)
> +{
> +	struct lm3646_flash *flash = i2c_get_clientdata(client);
> +
> +	v4l2_device_unregister_subdev(&flash->subdev_led);
> +	v4l2_ctrl_handler_free(&flash->ctrls_led);
> +	media_entity_cleanup(&flash->subdev_led.entity);
> +
> +	return 0;
> +}
> +
> +static const struct i2c_device_id lm3646_id_table[] = {
> +	{LM3646_NAME, 0},
> +	{}
> +};
> +
> +MODULE_DEVICE_TABLE(i2c, lm3646_id_table);
> +
> +static struct i2c_driver lm3646_i2c_driver = {
> +	.driver = {
> +		   .name = LM3646_NAME,
> +		   },
> +	.probe = lm3646_probe,
> +	.remove = lm3646_remove,
> +	.id_table = lm3646_id_table,
> +};
> +
> +module_i2c_driver(lm3646_i2c_driver);
> +
> +MODULE_AUTHOR("Daniel Jeong <gshark.jeong@xxxxxxxxx>");
> +MODULE_AUTHOR("Ldd Mlp <ldd-mlp@xxxxxxxxxxx>");
> +MODULE_DESCRIPTION("Texas Instruments LM3646 Dual Flash LED driver");
> +MODULE_LICENSE("GPL");
> diff --git a/include/media/lm3646.h b/include/media/lm3646.h
> new file mode 100644
> index 0000000..c6acf5a
> --- /dev/null
> +++ b/include/media/lm3646.h
> @@ -0,0 +1,87 @@
> +/*
> + * include/media/lm3646.h
> + *
> + * Copyright (C) 2014 Texas Instruments
> + *
> + * Contact: Daniel Jeong <gshark.jeong@xxxxxxxxx>
> + *			Ldd-Mlp <ldd-mlp@xxxxxxxxxxx>
> + *
> + * 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.
> + */
> +
> +#ifndef __LM3646_H__
> +#define __LM3646_H__
> +
> +#include <media/v4l2-subdev.h>
> +
> +#define LM3646_NAME	"lm3646"
> +#define LM3646_I2C_ADDR_REV1	(0x67)
> +#define LM3646_I2C_ADDR_REV0	(0x63)
> +
> +/*  TOTAL FLASH Brightness Max
> + *	min 93350uA, step 93750uA, max 1499600uA
> + */
> +#define LM3646_TOTAL_FLASH_BRT_MIN 93350
> +#define LM3646_TOTAL_FLASH_BRT_STEP 93750
> +#define LM3646_TOTAL_FLASH_BRT_MAX 1499600
> +#define LM3646_TOTAL_FLASH_BRT_uA_TO_REG(a)	\
> +	((a) < LM3646_TOTAL_FLASH_BRT_MIN ? 0 :	\
> +	 ((((a) - LM3646_TOTAL_FLASH_BRT_MIN) / LM3646_TOTAL_FLASH_BRT_STEP)))
> +
> +/*  TOTAL TORCH Brightness Max
> + *	min 23040uA, step 23430uA, max 187100uA
> + */
> +#define LM3646_TOTAL_TORCH_BRT_MIN 23040
> +#define LM3646_TOTAL_TORCH_BRT_STEP 23430
> +#define LM3646_TOTAL_TORCH_BRT_MAX 187100
> +#define LM3646_TOTAL_TORCH_BRT_uA_TO_REG(a)	\
> +	((a) < LM3646_TOTAL_TORCH_BRT_MIN ? 0 :	\
> +	 ((((a) - LM3646_TOTAL_TORCH_BRT_MIN) / LM3646_TOTAL_TORCH_BRT_STEP)))
> +
> +/*  LED1 FLASH Brightness
> + *	min 23040uA, step 11718uA, max 1499600uA
> + */
> +#define LM3646_LED1_FLASH_BRT_MIN 23040
> +#define LM3646_LED1_FLASH_BRT_STEP 11718
> +#define LM3646_LED1_FLASH_BRT_MAX 1499600
> +#define LM3646_LED1_FLASH_BRT_uA_TO_REG(a)	\
> +	((a) <= LM3646_LED1_FLASH_BRT_MIN ? 0 :	\
> +	 ((((a) - LM3646_LED1_FLASH_BRT_MIN) / LM3646_LED1_FLASH_BRT_STEP))+1)
> +
> +/*  LED1 TORCH Brightness
> + *	min 2530uA, step 1460uA, max 187100uA
> + */
> +#define LM3646_LED1_TORCH_BRT_MIN 2530
> +#define LM3646_LED1_TORCH_BRT_STEP 1460
> +#define LM3646_LED1_TORCH_BRT_MAX 187100
> +#define LM3646_LED1_TORCH_BRT_uA_TO_REG(a)	\
> +	((a) <= LM3646_LED1_TORCH_BRT_MIN ? 0 :	\
> +	 ((((a) - LM3646_LED1_TORCH_BRT_MIN) / LM3646_LED1_TORCH_BRT_STEP))+1)
> +
> +/*  FLASH TIMEOUT DURATION
> + *	min 50ms, step 50ms, max 400ms
> + */
> +#define LM3646_FLASH_TOUT_MIN 50
> +#define LM3646_FLASH_TOUT_STEP 50
> +#define LM3646_FLASH_TOUT_MAX 400
> +#define LM3646_FLASH_TOUT_ms_TO_REG(a)	\
> +	((a) <= LM3646_FLASH_TOUT_MIN ? 0 :	\
> +	 (((a) - LM3646_FLASH_TOUT_MIN) / LM3646_FLASH_TOUT_STEP))
> +
> +/* struct lm3646_platform_data
> + *
> + * @flash_timeout: flash timeout
> + * @led1_flash_brt: led1 flash mode brightness, uA
> + * @led1_torch_brt: led1 torch mode brightness, uA
> + */
> +struct lm3646_platform_data {
> +
> +	u32 flash_timeout;
> +
> +	u32 led1_flash_brt;
> +	u32 led1_torch_brt;
> +};
> +
> +#endif /* __LM3646_H__ */

-- 
Kind regards,

Sakari Ailus
e-mail: sakari.ailus@xxxxxx	XMPP: sailus@xxxxxxxxxxxxxx
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