Message-Id: <1378885531-20599-1-git-send-email-gshark.jeong@gmail.com>
Date:	Wed, 11 Sep 2013 16:45:31 +0900
From:	Daniel Jeong <gshark.jeong@...il.com>
To:	Mauro Carvalho Chehab <m.chehab@...sung.com>
Cc:	Hans Verkuil <hans.verkuil@...co.com>,
	Daniel Jeong <gshark.jeong@...il.com>,
	<linux-kernel@...r.kernel.org>, Sakari Ailus <sakari.ailus@....fi>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	<linux-media@...r.kernel.org>
Subject: [PATCH] media: i2c: add driver for dual LED Flash, lm3560. 

 This patch includes the driver for the LM3560, dual LED Flash.
 The LM3560 has two 1A constant current drivers for high current
 white LEDs. It is controlled via an I2C compatible interface(up to 400kHz).
 And each flash, torch brightness and enable/disable LED can be controlled
 independantly. But flash timeout and operation mode are shared.

Signed-off-by: Daniel Jeong <gshark.jeong@...il.com>
---
 drivers/media/i2c/Kconfig  |    9 +
 drivers/media/i2c/Makefile |    1 +
 drivers/media/i2c/lm3560.c |  716 ++++++++++++++++++++++++++++++++++++++++++++
 include/media/lm3560.h     |  103 +++++++
 4 files changed, 829 insertions(+)
 create mode 100644 drivers/media/i2c/lm3560.c
 create mode 100644 include/media/lm3560.h

diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index d18be19..75c8a03 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -621,6 +621,15 @@ config VIDEO_AS3645A
 	  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
+	depends on MEDIA_CAMERA_SUPPORT
+	select REGMAP_I2C
+	---help---
+	  This is a driver for the lm3560 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 9f462df..e03f177 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -70,6 +70,7 @@ obj-$(CONFIG_VIDEO_S5K4ECGX)	+= s5k4ecgx.o
 obj-$(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_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/lm3560.c b/drivers/media/i2c/lm3560.c
new file mode 100644
index 0000000..7721e2e
--- /dev/null
+++ b/drivers/media/i2c/lm3560.c
@@ -0,0 +1,716 @@
+/*
+ * drivers/media/i2c/lm3560.c
+ * General device driver for TI LM3560, Dual FLASH LED Driver
+ *
+ * Copyright (C) 2013 Texas Instruments
+ *
+ * Contact: Daniel Jeong <gshark.jeong@...il.com>
+ *          LDD-MLP <ldd-mlp@...t.ti.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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/regmap.h>
+#include <media/lm3560.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+
+/* registers definitions */
+#define REG_ENABLE	0x10
+#define REG_TORCH_BR	0xA0
+#define REG_FLASH_BR	0xB0
+#define REG_FLASH_TOUT	0xC0
+#define REG_FLAG	0xD0
+#define REG_CONFIG1	0xE0
+
+/* LED1 */
+#define LED1_ENABLE 0x08
+#define LED1_ENABLE_MASK 0x08
+#define FLASH1_BR_DATA(_br) (_br<<0)
+#define FLASH1_BR_MASK	0x0F
+#define TORCH1_BR_DATA(_br) (_br<<0)
+#define TORCH1_BR_MASK	0x07
+
+/* LED2 */
+#define LED2_ENABLE 0x10
+#define LED2_ENABLE_MASK 0x10
+#define FLASH2_BR_DATA(_br) (_br<<4)
+#define FLASH2_BR_MASK	0xF0
+#define TORCH2_BR_DATA(_br) (_br<<3)
+#define TORCH2_BR_MASK	0x38
+
+/* Configuration */
+#define ENABLE_MODE_MASK 0x03
+#define FLASH_TOUT_MASK 0x1F
+#define STROBE_EN_MASK 0x04
+#define STROBE_EN_DATA(_config) (_config<<2)
+#define PEAK_I_MASK 0x60
+
+/* Fault Mask */
+#define FAULT_TIMEOUT (1<<0)
+#define FAULT_OVERTEMP (1<<1)
+#define FAULT_SHORT_CIRCUIT (1<<2)
+
+#define to_lm3560_led_flash(sd, _id)\
+			container_of(sd, struct lm3560_flash, subdev_led##_id)
+
+enum led_enable {
+	MODE_SHDN = 0x0,
+	MODE_TORCH = 0x2,
+	MODE_FLASH = 0x3,
+};
+
+/* struct lm3560_flash
+ *
+ * @pdata: platform data
+ * @regmap: reg. map for i2c
+ * @power_lock: Protects power_count
+ * @power_count: Power reference count
+ * @led_mode: V4L2 LED mode
+ * @fault: falut data
+ * @ctrls_led#: V4L2 contols
+ * @subdev_led#: V4L2 subdev
+ */
+struct lm3560_flash {
+	struct lm3560_platform_data *pdata;
+	struct regmap *regmap;
+	struct mutex power_lock;
+	int power_count;
+
+	enum v4l2_flash_led_mode led_mode;
+	u8 fault;
+	/* LED1 */
+	struct v4l2_ctrl_handler ctrls_led1;
+	struct v4l2_subdev subdev_led1;
+	/* LED2 */
+	struct v4l2_ctrl_handler ctrls_led2;
+	struct v4l2_subdev subdev_led2;
+};
+
+/* i2c access */
+static int lm3560_read(struct lm3560_flash *flash, unsigned int reg)
+{
+	int rval;
+	unsigned int reg_val;
+
+	rval = regmap_read(flash->regmap, reg, &reg_val);
+	if (rval < 0)
+		return rval;
+	return reg_val & 0xFF;
+}
+
+static int lm3560_update(struct lm3560_flash *flash,
+			unsigned int reg, unsigned int mask, unsigned int data)
+{
+	return regmap_update_bits(flash->regmap, reg, mask, data);
+}
+
+/* enable mode control */
+static int lm3560_mode_ctrl(struct lm3560_flash *flash)
+{
+	int rval = 0;
+
+	rval = lm3560_update(flash, REG_FLASH_TOUT,
+				      PEAK_I_MASK, flash->pdata->peak);
+	if (rval < 0)
+		return rval;
+
+	switch (flash->led_mode) {
+	case V4L2_FLASH_LED_MODE_NONE:
+		rval = lm3560_update(flash,
+				     REG_ENABLE, ENABLE_MODE_MASK, MODE_SHDN);
+		break;
+	case V4L2_FLASH_LED_MODE_TORCH:
+		rval = lm3560_update(flash,
+				     REG_ENABLE, ENABLE_MODE_MASK, MODE_TORCH);
+		break;
+	case V4L2_FLASH_LED_MODE_FLASH:
+		rval = lm3560_update(flash,
+				     REG_ENABLE, ENABLE_MODE_MASK, MODE_FLASH);
+		break;
+	}
+
+	return rval;
+}
+
+/* led1/2  enable/disable */
+static int lm3560_enable_ctrl(struct lm3560_flash *flash,
+			      enum lm3560_led_id led_no, bool on)
+{
+	int rval = 0;
+
+	if (led_no == LM3560_LED1) {
+		if (on == true)
+			rval = lm3560_update(flash, REG_ENABLE,
+					     LED1_ENABLE_MASK, LED1_ENABLE);
+		else
+			rval = lm3560_update(flash,
+					     REG_ENABLE, LED1_ENABLE_MASK, 0);
+	} else {
+		if (on == true)
+			rval = lm3560_update(flash, REG_ENABLE,
+					     LED2_ENABLE_MASK, LED2_ENABLE);
+		else
+			rval = lm3560_update(flash,
+					     REG_ENABLE, LED2_ENABLE_MASK, 0);
+	}
+	return rval;
+}
+
+/* torch1/2 brightness control */
+static int lm3560_torch_brt_ctrl(struct lm3560_flash *flash,
+				 enum lm3560_led_id led_no, unsigned int brt)
+{
+	int rval;
+	u8 br_bits;
+
+	if (brt < LM3560_TORCH_BRT_MIN) {
+		rval = lm3560_enable_ctrl(flash, led_no, false);
+		goto out;
+	} else {
+		rval = lm3560_enable_ctrl(flash, led_no, true);
+	}
+
+	br_bits = LM3560_TORCH_BRT_uA_TO_REG(brt);
+	if (led_no == LM3560_LED1) {
+		rval = lm3560_update(flash, REG_TORCH_BR,
+				     TORCH1_BR_MASK, TORCH1_BR_DATA(br_bits));
+		if (rval < 0)
+			goto out;
+	} else {
+		rval = lm3560_update(flash, REG_TORCH_BR,
+				     TORCH2_BR_MASK, TORCH2_BR_DATA(br_bits));
+		if (rval < 0)
+			goto out;
+	}
+out:
+	return rval;
+}
+
+/* flash1/2 brightness control */
+static int lm3560_flash_brt_ctrl(struct lm3560_flash *flash,
+				 enum lm3560_led_id led_no, unsigned int brt)
+{
+	int rval;
+	u8 br_bits;
+
+	if (brt < LM3560_FLASH_BRT_MIN) {
+		rval = lm3560_enable_ctrl(flash, led_no, false);
+		goto out;
+	} else {
+		rval = lm3560_enable_ctrl(flash, led_no, true);
+	}
+
+	br_bits = LM3560_FLASH_BRT_uA_TO_REG(brt);
+	if (led_no == LM3560_LED1) {
+		rval = lm3560_update(flash, REG_FLASH_BR,
+				     FLASH1_BR_MASK, FLASH1_BR_DATA(br_bits));
+		if (rval < 0)
+			goto out;
+	} else {
+		rval = lm3560_update(flash, REG_FLASH_BR,
+				     FLASH2_BR_MASK, FLASH2_BR_DATA(br_bits));
+		if (rval < 0)
+			goto out;
+	}
+out:
+	return rval;
+}
+
+/* LED1 - V4L2 controls  */
+static int lm3560_get_ctrl(struct v4l2_ctrl *ctrl, enum lm3560_led_id led_no)
+{
+	int rval;
+	s32 fault = 0;
+	struct lm3560_flash *flash = (led_no == LM3560_LED1) ?
+	    container_of(ctrl->handler, struct lm3560_flash, ctrls_led1) :
+	    container_of(ctrl->handler, struct lm3560_flash, ctrls_led2);
+
+	if (ctrl->id == V4L2_CID_FLASH_FAULT) {
+		rval = lm3560_read(flash, REG_FLAG);
+		if (rval < 0)
+			return rval;
+		flash->fault |= rval;
+		if (rval & FAULT_SHORT_CIRCUIT)
+			fault |= V4L2_FLASH_FAULT_SHORT_CIRCUIT;
+		if (rval & FAULT_OVERTEMP)
+			fault |= V4L2_FLASH_FAULT_OVER_TEMPERATURE;
+		if (rval & FAULT_TIMEOUT)
+			fault |= V4L2_FLASH_FAULT_TIMEOUT;
+		flash->fault = 0;
+
+		ctrl->cur.val = fault;
+	}
+	return 0;
+}
+
+static int lm3560_set_ctrl(struct v4l2_ctrl *ctrl, enum lm3560_led_id led_no)
+{
+	int rval = 0;
+	u8 tout_bits;
+	struct lm3560_flash *flash = (led_no == LM3560_LED1) ?
+	    container_of(ctrl->handler, struct lm3560_flash, ctrls_led1) :
+	    container_of(ctrl->handler, struct lm3560_flash, ctrls_led2);
+
+	switch (ctrl->id) {
+	case V4L2_CID_FLASH_LED_MODE:
+		flash->led_mode = ctrl->val;
+		if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH)
+			rval = lm3560_mode_ctrl(flash);
+		break;
+
+	case V4L2_CID_FLASH_STROBE_SOURCE:
+		rval = lm3560_update(flash, REG_CONFIG1,
+				     STROBE_EN_MASK, STROBE_EN_DATA(ctrl->val));
+		if (rval < 0)
+			goto err_out;
+		break;
+
+	case V4L2_CID_FLASH_STROBE:
+		if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH)
+			return -EBUSY;
+		flash->led_mode = V4L2_FLASH_LED_MODE_FLASH;
+		rval = lm3560_mode_ctrl(flash);
+		break;
+
+	case V4L2_CID_FLASH_STROBE_STOP:
+		if (flash->led_mode != V4L2_FLASH_LED_MODE_FLASH)
+			return -EBUSY;
+		flash->led_mode = V4L2_FLASH_LED_MODE_NONE;
+		rval = lm3560_mode_ctrl(flash);
+		break;
+
+	case V4L2_CID_FLASH_TIMEOUT:
+		tout_bits = LM3560_FLASH_TOUT_ms_TO_REG(ctrl->val);
+		rval = lm3560_update(flash, REG_FLASH_TOUT,
+				     FLASH_TOUT_MASK, tout_bits);
+		break;
+
+	case V4L2_CID_FLASH_INTENSITY:
+		rval = lm3560_flash_brt_ctrl(flash, led_no, ctrl->val);
+		break;
+
+	case V4L2_CID_FLASH_TORCH_INTENSITY:
+		rval = lm3560_torch_brt_ctrl(flash, led_no, ctrl->val);
+		break;
+	}
+	if (rval < 0)
+		goto err_out;
+
+	rval = lm3560_read(flash, REG_FLAG);
+	if (rval < 0)
+		goto err_out;
+	flash->fault |= rval;
+	return 0;
+err_out:
+	return rval;
+}
+
+/* led 1 */
+static int lm3560_led1_get_ctrl(struct v4l2_ctrl *ctrl)
+{
+	return lm3560_get_ctrl(ctrl, LM3560_LED1);
+}
+
+static int lm3560_led1_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+	return lm3560_set_ctrl(ctrl, LM3560_LED1);
+}
+
+static const struct v4l2_ctrl_ops lm3560_led1_ctrl_ops = {
+	.g_volatile_ctrl = lm3560_led1_get_ctrl,
+	.s_ctrl = lm3560_led1_set_ctrl,
+};
+
+/* led 2 */
+static int lm3560_led2_get_ctrl(struct v4l2_ctrl *ctrl)
+{
+	return lm3560_get_ctrl(ctrl, LM3560_LED2);
+}
+
+static int lm3560_led2_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+	return lm3560_set_ctrl(ctrl, LM3560_LED2);
+}
+
+static const struct v4l2_ctrl_ops lm3560_led2_ctrl_ops = {
+	.g_volatile_ctrl = lm3560_led2_get_ctrl,
+	.s_ctrl = lm3560_led2_set_ctrl,
+};
+
+static int lm3560_init_controls(struct lm3560_flash *flash,
+				enum lm3560_led_id led_no)
+{
+	u32 max_flash_brt;
+	u32 max_torch_brt;
+	struct v4l2_ctrl *fault;
+	struct v4l2_ctrl_handler *hdl;
+	const struct v4l2_ctrl_ops *ops;
+
+	if (led_no == LM3560_LED1) {
+		hdl = &flash->ctrls_led1;
+		ops = &lm3560_led1_ctrl_ops;
+		max_torch_brt = flash->pdata->max_torch1_brt;
+		max_flash_brt = flash->pdata->max_flash1_brt;
+	} else {
+		hdl = &flash->ctrls_led2;
+		ops = &lm3560_led2_ctrl_ops;
+		max_torch_brt = flash->pdata->max_torch2_brt;
+		max_flash_brt = flash->pdata->max_flash2_brt;
+	}
+
+	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->led_mode = 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,
+			  LM3560_FLASH_TOUT_MIN,
+			  flash->pdata->max_flash_timeout,
+			  LM3560_FLASH_TOUT_STEP,
+			  flash->pdata->max_flash_timeout);
+
+	/* flash brt */
+	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_INTENSITY, 0, max_flash_brt,
+			  LM3560_FLASH_BRT_STEP, max_flash_brt);
+
+	/* torch brt */
+	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FLASH_TORCH_INTENSITY, 0,
+			  max_torch_brt, LM3560_TORCH_BRT_STEP, max_torch_brt);
+
+	/* 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;
+
+	if (led_no == LM3560_LED1)
+		flash->subdev_led1.ctrl_handler = hdl;
+	else
+		flash->subdev_led2.ctrl_handler = hdl;
+
+	return 0;
+}
+
+/*V4L2 subdev operations */
+static int lm3560_init_device(struct lm3560_flash *flash,
+			      enum lm3560_led_id led_no)
+{
+	int rval;
+
+	/* Reset faults */
+	rval = lm3560_read(flash, REG_FLAG);
+	if (rval < 0)
+		return rval;
+	/* output disable */
+	flash->led_mode = V4L2_FLASH_LED_MODE_NONE;
+	rval = lm3560_mode_ctrl(flash);
+	return rval;
+}
+
+static int __lm3560_set_power(struct lm3560_flash *flash, int on,
+			      enum lm3560_led_id led_no)
+{
+	int rval = 0;
+	struct v4l2_subdev *sd = (led_no == LM3560_LED1) ?
+	    &flash->subdev_led1 : &flash->subdev_led2;
+
+	if (!on) {
+		flash->led_mode = V4L2_FLASH_LED_MODE_NONE;
+		rval = lm3560_mode_ctrl(flash);
+		if (rval < 0)
+			return rval;
+	}
+
+	if (flash->pdata->set_power != NULL) {
+		rval = flash->pdata->set_power(sd, on, led_no);
+		if (rval < 0)
+			return rval;
+	}
+
+	if (on) {
+		rval = lm3560_init_device(flash, led_no);
+		if ((rval < 0) && (flash->pdata->set_power != NULL))
+			flash->pdata->set_power(sd, 0, led_no);
+	}
+	return rval;
+}
+
+static int lm3560_set_power(struct v4l2_subdev *subdev,
+			    int on, enum lm3560_led_id led_no)
+{
+	int rval = 0;
+	struct lm3560_flash *flash = (led_no == LM3560_LED1) ?
+	    to_lm3560_led_flash(subdev, 1) : to_lm3560_led_flash(subdev, 2);
+
+	mutex_lock(&flash->power_lock);
+	if (flash->power_count == !on) {
+		rval = __lm3560_set_power(flash, !!on, led_no);
+		if (rval < 0)
+			goto out;
+	}
+	flash->power_count += on ? 1 : -1;
+	WARN_ON(flash->power_count < 0);
+out:
+	mutex_unlock(&flash->power_lock);
+	return rval;
+}
+
+/* led 1 */
+static int lm3560_led1_set_power(struct v4l2_subdev *subdev, int on)
+{
+	return lm3560_set_power(subdev, on, LM3560_LED1);
+}
+
+static int lm3560_led1_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+	return lm3560_set_power(sd, 1, LM3560_LED1);
+}
+
+static int lm3560_led1_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+	return lm3560_set_power(sd, 0, LM3560_LED1);
+}
+
+static const struct v4l2_subdev_core_ops lm3560_led1_core_ops = {
+	.s_power = lm3560_led1_set_power,
+};
+
+static const struct v4l2_subdev_ops lm3560_led1_ops = {
+	.core = &lm3560_led1_core_ops,
+};
+
+static const struct v4l2_subdev_internal_ops lm3560_led1_internal_ops = {
+	.open = lm3560_led1_open,
+	.close = lm3560_led1_close,
+};
+
+/* led 2 */
+static int lm3560_led2_set_power(struct v4l2_subdev *subdev, int on)
+{
+	return lm3560_set_power(subdev, on, LM3560_LED2);
+}
+
+static int lm3560_led2_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+	return lm3560_set_power(sd, 1, LM3560_LED2);
+}
+
+static int lm3560_led2_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+	return lm3560_set_power(sd, 0, LM3560_LED2);
+}
+
+static const struct v4l2_subdev_core_ops lm3560_led2_core_ops = {
+	.s_power = lm3560_led2_set_power,
+};
+
+static const struct v4l2_subdev_ops lm3560_led2_ops = {
+	.core = &lm3560_led2_core_ops,
+};
+
+static const struct v4l2_subdev_internal_ops lm3560_led2_internal_ops = {
+	.open = lm3560_led2_open,
+	.close = lm3560_led2_close,
+};
+
+#ifdef CONFIG_PM
+static int lm3560_suspend(struct device *dev)
+{
+	int rval;
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
+	struct lm3560_flash *flash1 = to_lm3560_led_flash(subdev, 1);
+	struct lm3560_flash *flash2 = to_lm3560_led_flash(subdev, 2);
+
+	if (flash1->power_count == 0)
+		return 0;
+	rval = __lm3560_set_power(flash1, 0, LM3560_LED1);
+	if (rval < 0)
+		return rval;
+	return __lm3560_set_power(flash2, 0, LM3560_LED2);
+}
+
+static int lm3560_resume(struct device *dev)
+{
+	int rval;
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
+	struct lm3560_flash *flash1 = to_lm3560_led_flash(subdev, 1);
+	struct lm3560_flash *flash2 = to_lm3560_led_flash(subdev, 2);
+
+	if (flash1->power_count == 0)
+		return 0;
+	rval = __lm3560_set_power(flash1, 1, LM3560_LED1);
+	if (rval < 0)
+		return rval;
+	return __lm3560_set_power(flash2, 1, LM3560_LED2);
+}
+#else
+
+#define lm3560_suspend	NULL
+#define lm3560_resume	NULL
+
+#endif
+
+static const struct regmap_config lm3560_regmap = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = 0xFF,
+};
+
+static int lm3560_probe(struct i2c_client *client,
+			const struct i2c_device_id *devid)
+{
+	int rval;
+	struct lm3560_flash *flash;
+	flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL);
+	if (flash == NULL)
+		return -ENOMEM;
+
+	flash->regmap = devm_regmap_init_i2c(client, &lm3560_regmap);
+	if (IS_ERR(flash->regmap)) {
+		rval = PTR_ERR(flash->regmap);
+		return rval;
+	}
+
+	/* if there is no platform data, use chip default value */
+	if (client->dev.platform_data == NULL) {
+		flash->pdata =
+		    kzalloc(sizeof(struct lm3560_platform_data), GFP_KERNEL);
+		if (flash->pdata == NULL)
+			return -ENODEV;
+		flash->pdata->set_power = NULL;
+		flash->pdata->peak = LM3560_PEAK_3600mA;
+		flash->pdata->max_flash_timeout = LM3560_FLASH_TOUT_MAX;
+		/* led 1 */
+		flash->pdata->max_flash1_brt = LM3560_FLASH_BRT_MAX;
+		flash->pdata->max_torch1_brt = LM3560_TORCH_BRT_MAX;
+		/* led 2 */
+		flash->pdata->max_flash2_brt = LM3560_FLASH_BRT_MAX;
+		flash->pdata->max_torch2_brt = LM3560_TORCH_BRT_MAX;
+	} else {
+		flash->pdata = dev_get_platdata(&client->dev);
+	}
+
+	mutex_init(&flash->power_lock);
+
+	/* led 1 */
+	v4l2_i2c_subdev_init(&flash->subdev_led1, client, &lm3560_led1_ops);
+	flash->subdev_led1.internal_ops = &lm3560_led1_internal_ops;
+	flash->subdev_led1.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+	strcpy(flash->subdev_led1.name, "lm3560-led1");
+	rval = lm3560_init_controls(flash, LM3560_LED1);
+	if (rval < 0)
+		goto err_out_led1;
+	rval = media_entity_init(&flash->subdev_led1.entity, 0, NULL, 0);
+	if (rval < 0)
+		goto err_out_led1;
+	flash->subdev_led1.entity.type = MEDIA_ENT_T_V4L2_SUBDEV_FLASH;
+
+	/* led 2 */
+	v4l2_i2c_subdev_init(&flash->subdev_led2, client, &lm3560_led2_ops);
+	flash->subdev_led2.internal_ops = &lm3560_led2_internal_ops;
+	flash->subdev_led2.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+	strcpy(flash->subdev_led2.name, "lm3560-led2");
+	rval = lm3560_init_controls(flash, LM3560_LED2);
+	if (rval)
+		goto err_out_led2;
+	rval = media_entity_init(&flash->subdev_led2.entity, 0, NULL, 0);
+	if (rval < 0)
+		goto err_out_led2;
+	flash->subdev_led2.entity.type = MEDIA_ENT_T_V4L2_SUBDEV_FLASH;
+
+	return rval;
+
+err_out_led2:
+	v4l2_ctrl_handler_free(&flash->ctrls_led2);
+err_out_led1:
+	v4l2_ctrl_handler_free(&flash->ctrls_led1);
+	return rval;
+}
+
+static int lm3560_remove(struct i2c_client *client)
+{
+	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
+	struct lm3560_flash *flash1 = to_lm3560_led_flash(subdev, 1);
+	struct lm3560_flash *flash2 = to_lm3560_led_flash(subdev, 2);
+
+	/* led 2 */
+	v4l2_device_unregister_subdev(&flash2->subdev_led2);
+	v4l2_ctrl_handler_free(&flash2->ctrls_led2);
+	media_entity_cleanup(&flash2->subdev_led2.entity);
+
+	/* led 1 */
+	v4l2_device_unregister_subdev(&flash1->subdev_led1);
+	v4l2_ctrl_handler_free(&flash1->ctrls_led1);
+	media_entity_cleanup(&flash1->subdev_led1.entity);
+
+	return 0;
+}
+
+static const struct i2c_device_id lm3560_id_table[] = {
+	{LM3560_NAME, 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, lm3560_id_table);
+
+static const struct dev_pm_ops lm3560_pm_ops = {
+	.suspend = lm3560_suspend,
+	.resume = lm3560_resume,
+};
+
+static struct i2c_driver lm3560_i2c_driver = {
+	.driver = {
+		   .name = LM3560_NAME,
+		   .pm = &lm3560_pm_ops,
+		   },
+	.probe = lm3560_probe,
+	.remove = lm3560_remove,
+	.id_table = lm3560_id_table,
+};
+
+module_i2c_driver(lm3560_i2c_driver);
+
+MODULE_AUTHOR("Daniel Jeong <gshark.jeong@...il.com>");
+MODULE_AUTHOR("LDD MLP <ldd-mlp@...t.ti.com>");
+MODULE_DESCRIPTION("Texas Instruments LM3560 Dual LED flash driver");
+MODULE_LICENSE("GPL");
diff --git a/include/media/lm3560.h b/include/media/lm3560.h
new file mode 100644
index 0000000..824dbf4
--- /dev/null
+++ b/include/media/lm3560.h
@@ -0,0 +1,103 @@
+/*
+ * include/media/lm3560.h
+ *
+ * Copyright (C) 2013 Texas Instruments
+ *
+ * Contact: Daniel Jeong <gshark.jeong@...il.com>
+ *          LDD-MLP <ldd-mlp@...t.ti.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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#ifndef __LM3560_H__
+#define __LM3560_H__
+
+#include <media/v4l2-subdev.h>
+
+#define LM3560_NAME				"lm3560"
+#define LM3560_I2C_ADDR			(0x53)
+
+/*  FLASH Brightness
+ *	min 62500uA, step 62500uA, max 1000000uA
+ */
+#define LM3560_FLASH_BRT_MIN 62500
+#define LM3560_FLASH_BRT_STEP 62500
+#define LM3560_FLASH_BRT_MAX 1000000
+#define LM3560_FLASH_BRT_uA_TO_REG(a)	\
+	((a) < LM3560_FLASH_BRT_MIN ? 0 :	\
+	 (((a) - LM3560_FLASH_BRT_MIN) / LM3560_FLASH_BRT_STEP))
+#define LM3560_FLASH_BRT_REG_TO_uA(a)		\
+	((a) * LM3560_FLASH_BRT_STEP + LM3560_FLASH_BRT_MIN)
+
+/*  FLASH TIMEOUT DURATION
+ *	min 32ms, step 32ms, max 1024ms
+ */
+#define LM3560_FLASH_TOUT_MIN 32
+#define LM3560_FLASH_TOUT_STEP 32
+#define LM3560_FLASH_TOUT_MAX 1024
+#define LM3560_FLASH_TOUT_ms_TO_REG(a)	\
+	((a) < LM3560_FLASH_TOUT_MIN ? 0 :	\
+	 (((a) - LM3560_FLASH_TOUT_MIN) / LM3560_FLASH_TOUT_STEP))
+#define LM3560_FLASH_TOUT_REG_TO_ms(a)		\
+	((a) * LM3560_FLASH_TOUT_STEP + LM3560_FLASH_TOUT_MIN)
+
+/*  TORCH BRT
+ *	min 31250uA, step 31250uA, max 250000uA
+ */
+#define LM3560_TORCH_BRT_MIN 31250
+#define LM3560_TORCH_BRT_STEP 31250
+#define LM3560_TORCH_BRT_MAX 250000
+#define LM3560_TORCH_BRT_uA_TO_REG(a)	\
+	((a) < LM3560_TORCH_BRT_MIN ? 0 :	\
+	 (((a) - LM3560_TORCH_BRT_MIN) / LM3560_TORCH_BRT_STEP))
+#define LM3560_TORCH_BRT_REG_TO_uA(a)		\
+	((a) * LM3560_TORCH_BRT_STEP + LM3560_TORCH_BRT_MIN)
+
+enum lm3560_led_id {
+	LM3560_LED1 = 0,
+	LM3560_LED2
+};
+
+enum lm3560_peak_current {
+	LM3560_PEAK_1600mA = 0x00,
+	LM3560_PEAK_2300mA = 0x20,
+	LM3560_PEAK_3000mA = 0x40,
+	LM3560_PEAK_3600mA = 0x60
+};
+
+/*
+ * lm3560 platform data
+ *@...k : peak current 1.6, 2.3, 3.0, 3.6A
+ *@..._power : power callback.
+ *@..._flash_timeout : max flash time out(ms < 1024)
+ *@..._flash1_brt : max brightness led 1 flash mode(uA < 1000000uA)
+ *@..._torch1_brt : max brightness led 1 torch mode(uA < 250000uA)
+ *@..._flash2_brt : max brightness led 2 flash mode(uA < 1000000uA)
+ *@..._torch2_brt : max brightness led 2 torch mode(uA < 250000uA)
+ */
+struct lm3560_platform_data {
+	enum lm3560_peak_current peak;
+	int (*set_power) (struct v4l2_subdev *sd, int on,
+			  enum lm3560_led_id led_no);
+
+	u32 max_flash_timeout;
+	u32 max_flash1_brt;
+	u32 max_torch1_brt;
+	u32 max_flash2_brt;
+	u32 max_torch2_brt;
+};
+
+#endif /* __LM3560_H__ */
-- 
1.7.9.5

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