diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index a6eca797f16c..9767e1814755 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -881,6 +881,17 @@ config VIDEO_GC2385
 	  To compile this driver as a module, choose M here: the
 	  module will be called gc2385.
 
+config VIDEO_GC5025
+	tristate "GalaxyCore GC5025 sensor support"
+	depends on VIDEO_V4L2 && I2C && MEDIA_CONTROLLER
+	depends on MEDIA_CAMERA_SUPPORT
+	select V4L2_FWNODE
+	help
+	  Support for the GalaxyCore GC5025 sensor.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called gc5025.
+
 config VIDEO_SC031GS
 	tristate "GalaxyCore SC031GS sensor support"
 	depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index f6e1150074f6..83d69085ef8c 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -105,6 +105,7 @@ obj-$(CONFIG_VIDEO_GC0329)	+= gc0329.o
 obj-$(CONFIG_VIDEO_GC2035)	+= gc2035.o
 obj-$(CONFIG_VIDEO_GC2355)	+= gc2355.o
 obj-$(CONFIG_VIDEO_GC2385)	+= gc2385.o
+obj-$(CONFIG_VIDEO_GC5025)	+= gc5025.o
 obj-$(CONFIG_VIDEO_SC031GS)	+= sc031gs.o
 
 obj-$(CONFIG_VIDEO_PREISP_DUMMY_SENSOR) += preisp-dummy.o
diff --git a/drivers/media/i2c/gc5025.c b/drivers/media/i2c/gc5025.c
new file mode 100644
index 000000000000..1e8fb3660a42
--- /dev/null
+++ b/drivers/media/i2c/gc5025.c
@@ -0,0 +1,1879 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * gc5025 driver
+ *
+ * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd.
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <linux/sysfs.h>
+#include <linux/rk-camera-module.h>
+#include <media/media-entity.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-subdev.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/slab.h>
+
+#ifndef V4L2_CID_DIGITAL_GAIN
+#define V4L2_CID_DIGITAL_GAIN		V4L2_CID_GAIN
+#endif
+
+#define GC5025_LANES			2
+#define GC5025_BITS_PER_SAMPLE		10
+#define GC5025_LINK_FREQ_MHZ		432000000
+/* pixel rate = link frequency * 2 * lanes / BITS_PER_SAMPLE */
+#define GC5025_PIXEL_RATE		(GC5025_LINK_FREQ_MHZ * 2 * 2 / 10)
+#define GC5025_XVCLK_FREQ		24000000
+
+#define CHIP_ID				0x5025
+#define GC5025_REG_CHIP_ID_H		0xf0
+#define GC5025_REG_CHIP_ID_L		0xf1
+
+#define GC5025_REG_SET_PAGE		0xfe
+#define GC5025_SET_PAGE_ONE		0x00
+
+#define GC5025_REG_CTRL_MODE		0x3f
+#define GC5025_MODE_SW_STANDBY		0x01
+#define GC5025_MODE_STREAMING		0x91
+
+#define GC5025_REG_EXPOSURE_H		0x03
+#define GC5025_REG_EXPOSURE_L		0x04
+#define GC5025_FETCH_HIGH_BYTE_EXP(VAL) (((VAL) >> 8) & 0x0F)	/* 4 Bits */
+#define GC5025_FETCH_LOW_BYTE_EXP(VAL) ((VAL) & 0xFF)	/* 8 Bits */
+#define GC5025_FETCH_LOW_BYTE_EXP(VAL) ((VAL) & 0xFF)	/* 8 Bits */
+#define	GC5025_EXPOSURE_MIN		4
+#define	GC5025_EXPOSURE_STEP		1
+#define GC5025_VTS_MAX			0x1fff
+
+#define GC5025_REG_AGAIN		0xb6
+#define GC5025_REG_DGAIN_INT		0xb1
+#define GC5025_REG_DGAIN_FRAC		0xb2
+#define GC5025_GAIN_MIN			64
+#define GC5025_GAIN_MAX			1024
+#define GC5025_GAIN_STEP		1
+#define GC5025_GAIN_DEFAULT		64
+
+#define GC5025_REG_VTS_H		0x07
+#define GC5025_REG_VTS_L		0x08
+
+#define REG_NULL			0xFF
+
+#define OF_CAMERA_PINCTRL_STATE_DEFAULT	"rockchip,camera_default"
+#define OF_CAMERA_PINCTRL_STATE_SLEEP	"rockchip,camera_sleep"
+
+#define GC5025_NAME			"gc5025"
+
+static const char * const gc5025_supply_names[] = {
+	"avdd",		/* Analog power */
+	"dovdd",	/* Digital I/O power */
+	"dvdd",		/* Digital core power */
+};
+
+#define GC5025_NUM_SUPPLIES ARRAY_SIZE(gc5025_supply_names)
+
+#define IMAGE_NORMAL_MIRROR
+#define DD_PARAM_QTY_5025	200
+#define INFO_ROM_START_5025	0x08
+#define INFO_WIDTH_5025		0x08
+#define WB_ROM_START_5025	0x88
+#define WB_WIDTH_5025		0x05
+#define GOLDEN_ROM_START_5025	0xe0
+#define GOLDEN_WIDTH_5025	0x05
+#define WINDOW_WIDTH		0x0a30
+#define WINDOW_HEIGHT		0x079c
+
+struct gc5025_otp_info {
+	u32 flag; //bit[7]: info bit[6]:wb bit[3]:dd
+	u32 module_id;
+	u32 lens_id;
+	u16 vcm_id;
+	u16 vcm_driver_id;
+	u32 year;
+	u32 month;
+	u32 day;
+	u32 rg_ratio;
+	u32 bg_ratio;
+	u32 golden_rg;
+	u32 golden_bg;
+	u16 dd_param_x[DD_PARAM_QTY_5025];
+	u16 dd_param_y[DD_PARAM_QTY_5025];
+	u16 dd_param_type[DD_PARAM_QTY_5025];
+	u16 dd_cnt;
+};
+
+struct gc5025_id_name {
+	u32 id;
+	char name[RKMODULE_NAME_LEN];
+};
+
+static const struct gc5025_id_name gc5025_module_info[] = {
+	{0x0d, "CameraKing"},
+	{0x00, "Unknown"}
+};
+
+static const struct gc5025_id_name gc5025_lens_info[] = {
+	{0xa9, "CK5502"},
+	{0x00, "Unknown"}
+};
+
+struct regval {
+	u8 addr;
+	u8 val;
+};
+
+struct gc5025_mode {
+	u32 width;
+	u32 height;
+	struct v4l2_fract max_fps;
+	u32 hts_def;
+	u32 vts_def;
+	u32 exp_def;
+	const struct regval *reg_list;
+};
+
+struct gc5025 {
+	struct i2c_client	*client;
+	struct clk		*xvclk;
+	struct gpio_desc	*reset_gpio;
+	struct gpio_desc	*pwdn_gpio;
+	struct regulator_bulk_data supplies[GC5025_NUM_SUPPLIES];
+
+	struct pinctrl		*pinctrl;
+	struct pinctrl_state	*pins_default;
+	struct pinctrl_state	*pins_sleep;
+
+	struct v4l2_subdev	subdev;
+	struct media_pad	pad;
+	struct v4l2_ctrl_handler ctrl_handler;
+	struct v4l2_ctrl	*exposure;
+	struct v4l2_ctrl	*anal_gain;
+	struct v4l2_ctrl	*digi_gain;
+	struct v4l2_ctrl	*hblank;
+	struct v4l2_ctrl	*vblank;
+	struct mutex		mutex;
+	bool			streaming;
+	const struct gc5025_mode *cur_mode;
+	u32			module_index;
+	const char		*module_facing;
+	const char		*module_name;
+	const char		*len_name;
+	u32 Dgain_ratio;
+	bool DR_State;
+	struct gc5025_otp_info *otp;
+	struct rkmodule_inf	module_inf;
+	struct rkmodule_awb_cfg	awb_cfg;
+};
+
+#define to_gc5025(sd) container_of(sd, struct gc5025, subdev)
+
+/*
+ * Xclk 24Mhz
+ */
+static const struct regval gc5025_global_regs[] = {
+	{REG_NULL, 0x00},
+};
+
+/*
+ * Xclk 24Mhz
+ * max_framerate 30fps
+ * mipi_datarate per lane 656Mbps
+ */
+static const struct regval gc5025_1600x1200_regs[] = {
+	{0xfe, 0x00},
+	{0xfe, 0x00},
+	{0xfe, 0x00},
+	{0xf7, 0x01},
+	{0xf8, 0x11},
+	{0xf9, 0x00},
+	{0xfa, 0xa0},
+	{0xfc, 0x2a},
+	{0xfe, 0x03},
+	{0x01, 0x07},
+	{0xfc, 0x2e},
+	{0xfe, 0x00},
+	{0x88, 0x03},
+	{0x03, 0x07},
+	{0x04, 0xC0},
+	{0x05, 0x02},
+	{0x06, 0x58},
+	{0x08, 0x20},
+	{0x0a, 0x1c},
+	{0x0c, 0x04},
+	{0x0d, 0x07},
+	{0x0e, 0x9c},
+	{0x0f, 0x0a},
+	{0x10, 0x30},
+	{0x17, 0xc0},
+	{0x18, 0x02},
+	{0x19, 0x17},
+	{0x1a, 0x1a},
+	{0x1e, 0x90},
+	{0x1f, 0xb0},
+	{0x20, 0x2b},
+	{0x21, 0x2b},
+	{0x26, 0x2b},
+	{0x25, 0xc1},
+	{0x27, 0x64},
+	{0x28, 0x00},
+	{0x29, 0x3f},
+	{0x2b, 0x80},
+	{0x30, 0x11},
+	{0x31, 0x20},
+	{0x32, 0xa0},
+	{0x33, 0x00},
+	{0x34, 0x55},
+	{0x3a, 0x00},
+	{0x3b, 0x00},
+	{0x81, 0x60},
+	{0xcb, 0x02},
+	{0xcd, 0x2d},
+	{0xcf, 0x50},
+	{0xd0, 0xb3},
+	{0xd1, 0x18},
+	{0xd9, 0xaa},
+	{0xdc, 0x03},
+	{0xdd, 0xaa},
+	{0xe0, 0x00},
+	{0xe1, 0x0a},
+	{0xe3, 0x2a},
+	{0xe4, 0xa0},
+	{0xe5, 0x06},
+	{0xe6, 0x10},
+	{0xe7, 0xc2},
+	{0xfe, 0x10},
+	{0xfe, 0x00},
+	{0xfe, 0x10},
+	{0xfe, 0x00},
+	{0x80, 0x10},
+	{0x89, 0x03},
+	{0xfe, 0x01},
+	{0x88, 0xf7},
+	{0x8a, 0x03},
+	{0x8e, 0xc7},
+	{0xfe, 0x00},
+	{0x40, 0x22},
+	{0x41, 0x28},
+	{0x42, 0x04},
+	{0x4e, 0x0f},
+	{0x4f, 0xf0},
+	{0x67, 0x0c},
+	{0xae, 0x40},
+	{0xaf, 0x04},
+	{0x60, 0x00},
+	{0x61, 0x80},
+	{0xb0, 0x58},
+	{0xb1, 0x01},
+	{0xb2, 0x00},
+	{0xb6, 0x00},
+	{0x91, 0x00},
+	{0x92, 0x02},
+	{0x94, 0x03},
+	{0xfe, 0x03},
+	{0x02, 0x03},
+	{0x03, 0x8e},
+	{0x06, 0x80},
+	{0x15, 0x00},
+	{0x16, 0x09},
+	{0x18, 0x0a},
+	{0x21, 0x10},
+	{0x22, 0x05},
+	{0x23, 0x20},
+	{0x24, 0x02},
+	{0x25, 0x20},
+	{0x26, 0x08},
+	{0x29, 0x06},
+	{0x2a, 0x0a},
+	{0x2b, 0x08},
+	{0xfe, 0x00},
+	{REG_NULL, 0x00},
+};
+
+static const struct regval gc5025_doublereset_reg[] = {
+	{0xfe, 0x00},
+	{0x1c, 0x1c},
+	{0x2f, 0x4a},
+	{0x38, 0x02},
+	{0x39, 0x00},
+	{0x3c, 0x02},
+	{0x3d, 0x02},
+	{0xd3, 0xcc},
+	{0x43, 0x03},
+	{0x1d, 0x13},
+	{REG_NULL, 0x00},
+};
+
+static const struct regval gc5025_disable_doublereset_reg[] = {
+	{0xfe, 0x00},
+	{0x1c, 0x2c},
+	{0x2f, 0x4d},
+	{0x38, 0x04},
+	{0x39, 0x02},
+	{0x3c, 0x08},
+	{0x3d, 0x0f},
+	{0xd3, 0xc4},
+	{0x43, 0x08},
+	{0x1d, 0x00},
+	{REG_NULL, 0x00},
+};
+
+static const struct gc5025_mode supported_modes[] = {
+	{
+		.width = 2592,
+		.height = 1944,
+		.max_fps = {
+			.numerator = 10000,
+			.denominator = 300000,
+		},
+		.exp_def = 0x07C0,
+		.hts_def = 0x04B0,
+		.vts_def = 0x07D0,
+		.reg_list = gc5025_1600x1200_regs,
+	},
+};
+
+static const s64 link_freq_menu_items[] = {
+	GC5025_LINK_FREQ_MHZ
+};
+
+/* Write registers up to 4 at a time */
+static int gc5025_write_reg(struct i2c_client *client, u8 reg, u8 val)
+{
+	struct i2c_msg msg;
+	u8 buf[2];
+	int ret;
+
+	buf[0] = reg & 0xFF;
+	buf[1] = val;
+
+	msg.addr = client->addr;
+	msg.flags = client->flags;
+	msg.buf = buf;
+	msg.len = sizeof(buf);
+
+	ret = i2c_transfer(client->adapter, &msg, 1);
+	if (ret >= 0)
+		return 0;
+
+	dev_err(&client->dev,
+		"gc5025 write reg(0x%x val:0x%x) failed !\n", reg, val);
+
+	return ret;
+}
+
+static int gc5025_write_array(struct i2c_client *client,
+				const struct regval *regs)
+{
+	u32 i = 0;
+	int ret = 0;
+
+	for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++)
+		ret = gc5025_write_reg(client, regs[i].addr, regs[i].val);
+
+	return ret;
+}
+
+/* Read registers up to 4 at a time */
+static int gc5025_read_reg(struct i2c_client *client, u8 reg, u8 *val)
+{
+	struct i2c_msg msg[2];
+	u8 buf[1];
+	int ret;
+
+	buf[0] = reg & 0xFF;
+
+	msg[0].addr = client->addr;
+	msg[0].flags = client->flags;
+	msg[0].buf = buf;
+	msg[0].len = sizeof(buf);
+
+	msg[1].addr = client->addr;
+	msg[1].flags = client->flags | I2C_M_RD;
+	msg[1].buf = buf;
+	msg[1].len = 1;
+
+	ret = i2c_transfer(client->adapter, msg, 2);
+	if (ret >= 0) {
+		*val = buf[0];
+		return 0;
+	}
+
+	dev_err(&client->dev,
+		"gc5025 read reg:0x%x failed !\n", reg);
+
+	return ret;
+}
+
+static int gc5025_get_reso_dist(const struct gc5025_mode *mode,
+	struct v4l2_mbus_framefmt *framefmt)
+{
+	return abs(mode->width - framefmt->width) +
+		abs(mode->height - framefmt->height);
+}
+
+static const struct gc5025_mode *
+gc5025_find_best_fit(struct v4l2_subdev_format *fmt)
+{
+	struct v4l2_mbus_framefmt *framefmt = &fmt->format;
+	int dist;
+	int cur_best_fit = 0;
+	int cur_best_fit_dist = -1;
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(supported_modes); i++) {
+		dist = gc5025_get_reso_dist(&supported_modes[i], framefmt);
+		if (cur_best_fit_dist == -1 || dist < cur_best_fit_dist) {
+			cur_best_fit_dist = dist;
+			cur_best_fit = i;
+		}
+	}
+
+	return &supported_modes[cur_best_fit];
+}
+
+static int gc5025_set_fmt(struct v4l2_subdev *sd,
+	struct v4l2_subdev_pad_config *cfg,
+	struct v4l2_subdev_format *fmt)
+{
+	struct gc5025 *gc5025 = to_gc5025(sd);
+	const struct gc5025_mode *mode;
+	s64 h_blank, vblank_def;
+
+	mutex_lock(&gc5025->mutex);
+
+	mode = gc5025_find_best_fit(fmt);
+	fmt->format.code = MEDIA_BUS_FMT_SRGGB10_1X10;
+	fmt->format.width = mode->width;
+	fmt->format.height = mode->height;
+	fmt->format.field = V4L2_FIELD_NONE;
+	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
+		*v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format;
+#else
+		mutex_unlock(&gc5025->mutex);
+		return -ENOTTY;
+#endif
+	} else {
+		gc5025->cur_mode = mode;
+		h_blank = mode->hts_def / 2;
+		__v4l2_ctrl_modify_range(gc5025->hblank, h_blank,
+			h_blank, 1, h_blank);
+		vblank_def = mode->vts_def - mode->height - 24;
+		__v4l2_ctrl_modify_range(gc5025->vblank, vblank_def,
+			GC5025_VTS_MAX - mode->height,
+			1, vblank_def);
+	}
+
+	mutex_unlock(&gc5025->mutex);
+
+	return 0;
+}
+
+static int gc5025_get_fmt(struct v4l2_subdev *sd,
+	struct v4l2_subdev_pad_config *cfg,
+	struct v4l2_subdev_format *fmt)
+{
+	struct gc5025 *gc5025 = to_gc5025(sd);
+	const struct gc5025_mode *mode = gc5025->cur_mode;
+
+	mutex_lock(&gc5025->mutex);
+	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
+		fmt->format = *v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
+#else
+		mutex_unlock(&gc5025->mutex);
+		return -ENOTTY;
+#endif
+	} else {
+		fmt->format.width = mode->width;
+		fmt->format.height = mode->height;
+		fmt->format.code = MEDIA_BUS_FMT_SRGGB10_1X10;
+		fmt->format.field = V4L2_FIELD_NONE;
+	}
+	mutex_unlock(&gc5025->mutex);
+
+	return 0;
+}
+
+static int gc5025_enum_mbus_code(struct v4l2_subdev *sd,
+	struct v4l2_subdev_pad_config *cfg,
+	struct v4l2_subdev_mbus_code_enum *code)
+{
+	if (code->index != 0)
+		return -EINVAL;
+	code->code = MEDIA_BUS_FMT_SRGGB10_1X10;
+
+	return 0;
+}
+
+static int gc5025_enum_frame_sizes(struct v4l2_subdev *sd,
+				    struct v4l2_subdev_pad_config *cfg,
+				   struct v4l2_subdev_frame_size_enum *fse)
+{
+	if (fse->index >= ARRAY_SIZE(supported_modes))
+		return -EINVAL;
+
+	if (fse->code != MEDIA_BUS_FMT_SRGGB10_1X10)
+		return -EINVAL;
+
+	fse->min_width  = supported_modes[fse->index].width;
+	fse->max_width  = supported_modes[fse->index].width;
+	fse->max_height = supported_modes[fse->index].height;
+	fse->min_height = supported_modes[fse->index].height;
+
+	return 0;
+}
+
+static int gc5025_g_frame_interval(struct v4l2_subdev *sd,
+	struct v4l2_subdev_frame_interval *fi)
+{
+	struct gc5025 *gc5025 = to_gc5025(sd);
+	const struct gc5025_mode *mode = gc5025->cur_mode;
+
+	mutex_lock(&gc5025->mutex);
+	fi->interval = mode->max_fps;
+	mutex_unlock(&gc5025->mutex);
+
+	return 0;
+}
+
+static int gc5025_otp_read_reg(struct i2c_client *client,
+	int page,
+	int address)
+{
+	int ret = 0;
+	u8 val = 0;
+	u8 addr_high = 0;
+
+	ret = gc5025_write_reg(client, 0xfe, 0x00);
+	ret |= gc5025_read_reg(client, 0xd4, &addr_high);
+	switch (page) {
+	case 0:
+		addr_high &= 0xfb;
+		break;
+	case 1:
+		addr_high |= 0x04;
+		break;
+	default:
+		break;
+	}
+	addr_high &= 0xfc;
+	addr_high |= (address & 0x300) >> 8;
+	ret |= gc5025_write_reg(client, 0xD4, addr_high);
+	ret |= gc5025_write_reg(client, 0xD5, address & 0xff);
+	ret |= gc5025_write_reg(client, 0xF3, 0x20);
+	ret |= gc5025_read_reg(client, 0xD7, &val);
+	if (ret != 0)
+		return ret;
+	return val;
+}
+
+static int gc5025_otp_enable(struct gc5025 *gc5025)
+{
+	struct i2c_client *client = gc5025->client;
+	u8 otp_clk = 0;
+	u8 otp_en = 0;
+	int ret = 0;
+
+	ret  = gc5025_write_reg(client, 0xfe, 0x00);
+	ret |= gc5025_write_reg(client, 0xf7, 0x01);
+	ret |= gc5025_write_reg(client, 0xf8, 0x11);
+	ret |= gc5025_write_reg(client, 0xf9, 0x00);
+	ret |= gc5025_write_reg(client, 0xfa, 0xa0);
+	ret |= gc5025_write_reg(client, 0xfc, 0x2a);
+	ret |= gc5025_write_reg(client, 0xfe, 0x03);
+	ret |= gc5025_write_reg(client, 0x01, 0x07);
+	ret |= gc5025_write_reg(client, 0xfc, 0x2e);
+	ret |= gc5025_write_reg(client, 0xfe, 0x00);
+	usleep_range(10, 20);
+	ret |= gc5025_write_reg(client, 0x88, 0x03);
+	ret |= gc5025_write_reg(client, 0xe7, 0xcc);
+	ret |= gc5025_write_reg(client, 0xfc, 0x2e);
+	ret |= gc5025_write_reg(client, 0xfa, 0xb0);
+
+	ret |= gc5025_read_reg(client, 0xfa, &otp_clk);
+	ret |= gc5025_read_reg(client, 0xd4, &otp_en);
+	otp_clk |= 0x10;
+	otp_en |= 0x80;
+	ret |= gc5025_write_reg(client, 0xfa, otp_clk);
+	ret |= gc5025_write_reg(client, 0xd4, otp_en);
+	usleep_range(100, 200);
+	return ret;
+}
+
+static int gc5025_otp_disable(struct gc5025 *gc5025)
+{
+	struct i2c_client *client = gc5025->client;
+	u8 otp_clk = 0;
+	u8 otp_en = 0;
+	int ret = 0;
+
+	ret = gc5025_read_reg(client, 0xfa, &otp_clk);
+	ret |= gc5025_read_reg(client, 0xd4, &otp_en);
+	otp_clk &= 0xef;
+	otp_en &= 0x7f;
+	ret |= gc5025_write_reg(client, 0xfa, otp_clk);
+	ret |= gc5025_write_reg(client, 0xd4, otp_en);
+	return ret;
+}
+
+static int gc5025_otp_read(struct gc5025 *gc5025)
+{
+	int otp_flag, i, j, index, temp, tmpH, tmpL;
+	struct gc5025_otp_info *otp_p;
+	struct device *dev = &gc5025->client->dev;
+	struct i2c_client *client = gc5025->client;
+	int checksum = 0;
+	int page = 0;
+	int total_number = 0;
+	u8 m_DD_Otp_Value[182];
+	u16 dd_rom_start, offset;
+	u8 info_start_add, wb_start_add, golden_start_add;
+	u8 check_dd_flag, type;
+	u8 dd0 = 0, dd1 = 0, dd2 = 0;
+	u16 x, y;
+	int cnt = 0;
+
+	otp_p = devm_kzalloc(dev, sizeof(*otp_p), GFP_KERNEL);
+	if (!otp_p)
+		return -ENOMEM;
+
+	/* OTP info and awb*/
+	otp_flag = gc5025_otp_read_reg(client, 1, 0x00);
+	for (index = 0; index < 2; index++) {
+		switch ((otp_flag >> (4 + 2 * index)) & 0x03) {
+		case 0x00:
+			dev_err(dev, "%s GC5025_OTP_INFO group %d is Empty!\n",
+				__func__, index + 1);
+			break;
+		case 0x01:
+			dev_dbg(dev, "%s GC5025_OTP_INFO group %d is Valid!\n",
+				__func__, index + 1);
+			checksum = 0;
+			info_start_add =
+				INFO_ROM_START_5025 + 8 * index * INFO_WIDTH_5025;
+			otp_p->module_id = gc5025_otp_read_reg(client,
+				1, info_start_add);
+			checksum += otp_p->module_id;
+			otp_p->lens_id = gc5025_otp_read_reg(client,
+				1, info_start_add + 8 * 1);
+			checksum += otp_p->lens_id;
+			otp_p->vcm_driver_id = gc5025_otp_read_reg(client,
+				1, info_start_add + 8 * 2);
+			checksum += otp_p->vcm_driver_id;
+			otp_p->vcm_id = gc5025_otp_read_reg(client, 1,
+				info_start_add + 8 * 3);
+			checksum += otp_p->vcm_id;
+			otp_p->year = gc5025_otp_read_reg(client, 1,
+				info_start_add + 8 * 4);
+			checksum += otp_p->year;
+			otp_p->month = gc5025_otp_read_reg(client,
+				1, info_start_add + 8 * 5);
+			checksum += otp_p->month;
+			otp_p->day = gc5025_otp_read_reg(client,
+				1, info_start_add + 8 * 6);
+			checksum += otp_p->day;
+			checksum = checksum % 255 + 1;
+			temp = gc5025_otp_read_reg(client,
+				1, 0x40 + 8 * index * INFO_WIDTH_5025);
+			if (checksum == temp) {
+				otp_p->flag = 0x80;
+				dev_dbg(dev, "fac info: module(0x%x) lens(0x%x) time(%d_%d_%d)\n",
+					otp_p->module_id,
+					otp_p->lens_id,
+					otp_p->year,
+					otp_p->month,
+					otp_p->day);
+			} else {
+				dev_err(dev, "otp module info check sum error\n");
+			}
+		break;
+		case 0x02:
+		case 0x03:
+			dev_err(dev, "%s GC5025_OTP_INFO group %d is Invalid !!\n",
+				__func__, index + 1);
+			break;
+		default:
+			break;
+		}
+		switch ((otp_flag >> (2 * index)) & 0x03) {
+		case 0x00:
+			dev_err(dev, "%s GC5025_OTP_WB group %d is Empty !\n",
+				__func__, index + 1);
+			break;
+		case 0x01:
+			dev_dbg(dev, "%s GC5025_OTP_WB group %d is Valid !!\n",
+				__func__, index + 1);
+			checksum = 0;
+			wb_start_add =
+				WB_ROM_START_5025 + 8 * index * WB_WIDTH_5025;
+			tmpH = gc5025_otp_read_reg(client,
+				1, wb_start_add);
+			checksum += tmpH;
+			tmpL = gc5025_otp_read_reg(client,
+				1, wb_start_add + 8 * 1);
+			checksum += tmpL;
+			otp_p->rg_ratio = (tmpH << 8) | tmpL;
+			tmpH = gc5025_otp_read_reg(client,
+				1, wb_start_add + 8 * 2);
+			checksum += tmpH;
+			tmpL = gc5025_otp_read_reg(client,
+				1, wb_start_add + 8 * 3);
+			checksum += tmpL;
+			otp_p->bg_ratio = (tmpH << 8) | tmpL;
+			checksum = checksum % 255 + 1;
+			temp = gc5025_otp_read_reg(client,
+				1, 0xa8 + 8 * index * WB_WIDTH_5025);
+			if (checksum == temp) {
+				otp_p->flag = 0x40;
+				dev_dbg(dev, "otp:(rg_ratio 0x%x, bg_ratio 0x%x)\n",
+					otp_p->rg_ratio, otp_p->bg_ratio);
+			}
+			break;
+		case 0x02:
+		case 0x03:
+			dev_err(dev, "%s GC5025_OTP_WB group %d is Invalid !!\n",
+				__func__, index + 1);
+			break;
+		default:
+			break;
+		}
+	}
+	/* OTP awb golden*/
+	otp_flag = gc5025_otp_read_reg(client, 1, 0xd8);
+	for (index = 0; index < 2; index++) {
+		switch ((otp_flag >> (2 * index)) & 0x03) {
+		case 0x00:
+			dev_err(dev, "%s GC5025_OTP_GOLDEN group %d is Empty !\n",
+				__func__, index + 1);
+			break;
+		case 0x01:
+			dev_dbg(dev, "%s GC5025_OTP_GOLDEN group %d is Valid !!\n",
+				__func__, index + 1);
+			checksum = 0;
+			golden_start_add =
+				GOLDEN_ROM_START_5025 + 8 * index * GOLDEN_WIDTH_5025;
+			tmpH = gc5025_otp_read_reg(client,
+				1, golden_start_add);
+			checksum += tmpH;
+			tmpL = gc5025_otp_read_reg(client,
+				1, golden_start_add + 8 * 1);
+			checksum += tmpL;
+			otp_p->golden_rg = (tmpH << 8) | tmpL;
+			tmpH = gc5025_otp_read_reg(client,
+				1, golden_start_add + 8 * 2);
+			checksum += tmpH;
+			tmpL = gc5025_otp_read_reg(client,
+				1, golden_start_add + 8 * 3);
+			checksum += tmpL;
+			otp_p->golden_bg = (tmpH << 8) | tmpL;
+			checksum = checksum % 255 + 1;
+			temp = gc5025_otp_read_reg(client,
+				1,
+				0x100 + 8 * index * GOLDEN_WIDTH_5025);
+			if (checksum == temp) {
+				dev_dbg(dev, "otp:(golden_rg 0x%x, golden_bg 0x%x)\n",
+					otp_p->golden_rg, otp_p->golden_bg);
+			}
+			break;
+		case 0x02:
+		case 0x03:
+			dev_err(dev, "%s GC5025_OTP_GOLDEN group %d is Invalid !!\n",
+				__func__, index + 1);
+			break;
+		default:
+			break;
+		}
+	}
+
+	/* OTP DD calibration data */
+	otp_flag = gc5025_otp_read_reg(client, 0, 0);
+	switch (otp_flag & 0x03) {
+	case 0x00:
+		dev_err(dev, "%s GC5025 OTP:flag_dd is EMPTY!\n",
+			__func__);
+		break;
+	case 0x01:
+		dev_dbg(dev, "%s GC5025 OTP:flag_dd is Valid!\n",
+			__func__);
+		checksum = 0;
+		total_number = gc5025_otp_read_reg(client, 0, 0x08) +
+			gc5025_otp_read_reg(client, 0, 0x10);
+		for (i = 0; i < 126; i++) {
+			m_DD_Otp_Value[i] =
+				gc5025_otp_read_reg(client,
+					0, 0x08 + 8 * i);
+			checksum += m_DD_Otp_Value[i];
+		}
+		for (i = 0; i < 56; i++) {
+			m_DD_Otp_Value[126 + i] =
+				gc5025_otp_read_reg(client,
+					1, 0x148 + 8 * i);
+			checksum += m_DD_Otp_Value[126 + i];
+		}
+		checksum = checksum % 255 + 1;
+		temp = gc5025_otp_read_reg(client, 1, 0x308);
+		if (checksum == temp) {
+			for (i = 0; i < total_number; i++) {
+				if (i < 31) {
+					page = 0;
+					dd_rom_start = 0x18;
+					offset = 0;
+				} else {
+					page = 1;
+					dd_rom_start = 0x148;
+					offset = 124;//31*4
+				}
+				check_dd_flag = gc5025_otp_read_reg(client,
+					page,
+					dd_rom_start + 8 * (4 * i - offset + 3));
+				if (check_dd_flag & 0x10) {
+					//Read OTP
+					type = check_dd_flag & 0x0f;
+					dd0 = gc5025_otp_read_reg(client, page,
+						dd_rom_start + 8 * (4 * i - offset));
+					dd1 = gc5025_otp_read_reg(client,
+						page,
+						dd_rom_start + 8 * (4 * i - offset + 1));
+					dd2 = gc5025_otp_read_reg(client,
+						page,
+						dd_rom_start + 8 * (4 * i - offset + 2));
+					x = ((dd1 & 0x0f) << 8) + dd0;
+					y = (dd2 << 4) + ((dd1 & 0xf0) >> 4);
+
+					if (type == 3) {
+						for (j = 0; j < 4; j++) {
+							otp_p->dd_param_x[cnt] = x;
+							otp_p->dd_param_y[cnt] = y + j;
+							otp_p->dd_param_type[cnt++] = 2;
+						}
+					} else if (type == 4) {
+						for (j = 0; j < 2; j++) {
+							otp_p->dd_param_x[cnt] = x;
+							otp_p->dd_param_y[cnt] = y + j;
+							otp_p->dd_param_type[cnt++] = 2;
+						}
+					} else {
+						otp_p->dd_param_x[cnt] = x;
+						otp_p->dd_param_y[cnt] = y;
+						otp_p->dd_param_type[cnt++] = type;
+					}
+				} else {
+					dev_err(dev, "%s GC5025_OTP_DD:check_id[%d] = %x,checkid error!!\n",
+						__func__, i, check_dd_flag);
+				}
+			}
+			otp_p->dd_cnt = cnt;
+			otp_p->flag |= 0x08;
+		}
+		break;
+	case 0x02:
+	case 0x03:
+		dev_err(dev, "%s GC5025 OTP:flag_dd is Invalid!\n",
+			__func__);
+		break;
+	default:
+		break;
+	}
+
+	if (otp_p->flag) {
+		gc5025->otp = otp_p;
+	} else {
+		gc5025->otp = NULL;
+		devm_kfree(dev, otp_p);
+	}
+
+	return 0;
+}
+
+static void gc5025_get_otp(struct gc5025_otp_info *otp,
+			       struct rkmodule_inf *inf)
+{
+	u32 i;
+
+	/* fac */
+	if (otp->flag & 0x80) {
+		inf->fac.flag = 1;
+		inf->fac.year = otp->year;
+		inf->fac.month = otp->month;
+		inf->fac.day = otp->day;
+		for (i = 0; i < ARRAY_SIZE(gc5025_module_info) - 1; i++) {
+			if (gc5025_module_info[i].id == otp->module_id)
+				break;
+		}
+		strlcpy(inf->fac.module, gc5025_module_info[i].name,
+			sizeof(inf->fac.module));
+
+		for (i = 0; i < ARRAY_SIZE(gc5025_lens_info) - 1; i++) {
+			if (gc5025_lens_info[i].id == otp->lens_id)
+				break;
+		}
+		strlcpy(inf->fac.lens, gc5025_lens_info[i].name,
+			sizeof(inf->fac.lens));
+	}
+	/* awb */
+	if (otp->flag & 0x40) {
+		inf->awb.flag = 1;
+		inf->awb.r_value = otp->rg_ratio;
+		inf->awb.b_value = otp->bg_ratio;
+		inf->awb.gr_value = 0;
+		inf->awb.gb_value = 0;
+
+		inf->awb.golden_r_value = 0;
+		inf->awb.golden_b_value = 0;
+		inf->awb.golden_gr_value = 0;
+		inf->awb.golden_gb_value = 0;
+	}
+}
+
+static void gc5025_get_module_inf(struct gc5025 *gc5025,
+				  struct rkmodule_inf *inf)
+{
+	struct gc5025_otp_info *otp = gc5025->otp;
+
+	strlcpy(inf->base.sensor,
+		GC5025_NAME,
+		sizeof(inf->base.sensor));
+	strlcpy(inf->base.module,
+		gc5025->module_name,
+		sizeof(inf->base.module));
+	strlcpy(inf->base.lens,
+		gc5025->len_name,
+		sizeof(inf->base.lens));
+	gc5025_get_otp(otp, inf);
+}
+
+static void gc5025_set_module_inf(struct gc5025 *gc5025,
+				  struct rkmodule_awb_cfg *cfg)
+{
+	mutex_lock(&gc5025->mutex);
+	memcpy(&gc5025->awb_cfg, cfg, sizeof(*cfg));
+	mutex_unlock(&gc5025->mutex);
+}
+
+static long gc5025_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
+{
+	struct gc5025 *gc5025 = to_gc5025(sd);
+	long ret = 0;
+
+	switch (cmd) {
+	case RKMODULE_GET_MODULE_INFO:
+		gc5025_get_module_inf(gc5025, (struct rkmodule_inf *)arg);
+		break;
+	case RKMODULE_AWB_CFG:
+		gc5025_set_module_inf(gc5025, (struct rkmodule_awb_cfg *)arg);
+		break;
+	default:
+		ret = -ENOTTY;
+		break;
+	}
+
+	return ret;
+}
+
+#ifdef CONFIG_COMPAT
+static long gc5025_compat_ioctl32(struct v4l2_subdev *sd,
+				  unsigned int cmd, unsigned long arg)
+{
+	void __user *up = compat_ptr(arg);
+	struct rkmodule_inf *inf;
+	struct rkmodule_awb_cfg *cfg;
+	long ret = 0;
+
+	switch (cmd) {
+	case RKMODULE_GET_MODULE_INFO:
+		inf = kzalloc(sizeof(*inf), GFP_KERNEL);
+		if (!inf) {
+			ret = -ENOMEM;
+			return ret;
+		}
+
+		ret = gc5025_ioctl(sd, cmd, inf);
+		if (!ret)
+			ret = copy_to_user(up, inf, sizeof(*inf));
+		kfree(inf);
+		break;
+	case RKMODULE_AWB_CFG:
+		cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
+		if (!cfg) {
+			ret = -ENOMEM;
+			return ret;
+		}
+
+		ret = copy_from_user(cfg, up, sizeof(*cfg));
+		if (!ret)
+			ret = gc5025_ioctl(sd, cmd, cfg);
+		kfree(cfg);
+		break;
+	default:
+		ret = -ENOTTY;
+		break;
+	}
+
+	return ret;
+}
+#endif
+
+/*--------------------------------------------------------------------------*/
+static int gc5025_apply_otp(struct gc5025 *gc5025)
+{
+	int R_gain, G_gain, B_gain, base_gain;
+	struct i2c_client *client = gc5025->client;
+	struct gc5025_otp_info *otp_p = gc5025->otp;
+	struct rkmodule_awb_cfg *awb_cfg = &gc5025->awb_cfg;
+	u32 golden_bg_ratio;
+	u32 golden_rg_ratio;
+	u32 golden_g_value;
+	u16 i, j;
+	u16 temp_x = 0, temp_y = 0;
+	u8 temp_type = 0;
+	u8 temp_val0, temp_val1, temp_val2;
+	u16 column, ii, iii, jj;
+
+	if (!gc5025->awb_cfg.enable)
+		return 0;
+
+	golden_g_value = (awb_cfg->golden_gb_value +
+		awb_cfg->golden_gr_value) / 2;
+	golden_bg_ratio =
+		awb_cfg->golden_b_value * 0x400 / golden_g_value;
+	golden_rg_ratio =
+		awb_cfg->golden_r_value * 0x400 / golden_g_value;
+	/* apply OTP WB Calibration */
+	if ((otp_p->flag & 0x40) && golden_bg_ratio && golden_rg_ratio) {
+		/* calculate G gain */
+		R_gain = golden_rg_ratio * 1000 / otp_p->rg_ratio;
+		B_gain = golden_bg_ratio * 1000 / otp_p->bg_ratio;
+		G_gain = 1000;
+		base_gain = (R_gain < B_gain) ? R_gain : B_gain;
+		base_gain = (base_gain < G_gain) ? base_gain : G_gain;
+
+		R_gain = 0x400 * R_gain / (base_gain);
+		B_gain = 0x400 * B_gain / (base_gain);
+		G_gain = 0x400 * G_gain / (base_gain);
+
+		/* update sensor WB gain */
+		gc5025_write_reg(client, 0xfe, 0x00);
+		gc5025_write_reg(client, 0xc6,
+			(G_gain & 0x7f8) >> 3);
+		gc5025_write_reg(client, 0xc7,
+			(R_gain & 0x7f8) >> 3);
+		gc5025_write_reg(client, 0xc8,
+			(B_gain & 0x7f8) >> 3);
+		gc5025_write_reg(client, 0xc9,
+			(G_gain & 0x7f8) >> 3);
+		gc5025_write_reg(client, 0xc4,
+			((G_gain & 0X07) << 4) | (R_gain & 0x07));
+		gc5025_write_reg(client, 0xc5,
+			((B_gain & 0X07) << 4) | (G_gain & 0x07));
+		dev_dbg(&client->dev, "apply awb gain: 0x%x, 0x%x, 0x%x\n",
+			R_gain, G_gain, B_gain);
+	}
+
+	/* apply OTP DD Calibration */
+	if (otp_p->flag & 0x08) {
+#if defined IMAGE_NORMAL_MIRROR
+#elif defined IMAGE_H_MIRROR
+		for (i = 0; i < otp_p->dd_cnt; i++) {
+			if (otp_p->dd_param_type[i] == 0) {
+				otp_p->dd_param_x[i] =
+					WINDOW_WIDTH - otp_p->dd_param_x[i] + 1;
+			} else if (otp_p->dd_param_type[i] == 1) {
+				otp_p->dd_param_x[i] =
+					WINDOW_WIDTH - otp_p->dd_param_x[i] - 1;
+			} else {
+				otp_p->dd_param_x[i] =
+					WINDOW_WIDTH - otp_p->dd_param_x[i];
+			}
+		}
+#elif defined IMAGE_V_MIRROR
+		for (i = 0; i < otp_p->dd_cnt; i++) {
+			otp_p->dd_param_y[i] =
+				WINDOW_HEIGHT - otp_p->dd_param_y[i] + 1;
+		}
+#elif defined IMAGE_HV_MIRROR
+		for (i = 0; i < otp_p->dd_cnt; i++) {
+			if (otp_p->dd_param_type[i] == 0) {
+				otp_p->dd_param_x[i] =
+					WINDOW_WIDTH - otp_p->dd_param_x[i] + 1;
+				otp_p->dd_param_y[i] =
+					WINDOW_HEIGHT - otp_p->dd_param_y[i] + 1;
+			} else if (otp_p->dd_param_type[i] == 1) {
+				otp_p->dd_param_x[i] =
+					WINDOW_WIDTH - otp_p->dd_param_x[i] - 1;
+				otp_p->dd_param_y[i] =
+					WINDOW_HEIGHT - otp_p->dd_param_y[i] + 1;
+			} else {
+				otp_p->dd_param_x[i] =
+					WINDOW_WIDTH - otp_p->dd_param_x[i];
+				otp_p->dd_param_y[i] =
+					WINDOW_HEIGHT - otp_p->dd_param_y[i] + 1;
+			}
+		}
+#endif
+		//y
+		for (i = 0; i < otp_p->dd_cnt - 1; i++) {
+			for (j = 0; j < otp_p->dd_cnt - 1 - i; j++) {
+				if (otp_p->dd_param_y[j] >
+					otp_p->dd_param_y[j + 1]) {
+					temp_x = otp_p->dd_param_x[j];
+					otp_p->dd_param_x[j] =
+						otp_p->dd_param_x[j + 1];
+					otp_p->dd_param_x[j + 1] =
+						temp_x;
+					temp_y =
+						otp_p->dd_param_y[j];
+					otp_p->dd_param_y[j] =
+						otp_p->dd_param_y[j + 1];
+					otp_p->dd_param_y[j + 1] =
+						temp_y;
+					temp_type =
+						otp_p->dd_param_type[j];
+					otp_p->dd_param_type[j] =
+						otp_p->dd_param_type[j + 1];
+					otp_p->dd_param_type[j + 1] =
+						temp_type;
+				}
+			}
+		}
+		//x
+		column = 0;
+		for (i = 0 ; i < otp_p->dd_cnt - 1; ++i) {
+			if (otp_p->dd_param_y[i] == otp_p->dd_param_y[i + 1]) {
+				column++;
+				if (otp_p->dd_cnt - 2 != i)
+					continue;
+			}
+			if (otp_p->dd_cnt - 2 == i &&
+				otp_p->dd_param_y[i] == otp_p->dd_param_y[i + 1]) {
+				i = otp_p->dd_cnt - 1;
+			}
+			iii = i - column;
+			for (ii = i - column; ii < i ; ++ii) {
+				for (jj = i - column; jj <
+					i - (ii - iii); ++jj) {
+					if (otp_p->dd_param_x[jj] >
+						otp_p->dd_param_x[jj + 1]) {
+						temp_x = otp_p->dd_param_x[jj];
+						otp_p->dd_param_x[jj] =
+							otp_p->dd_param_x[jj + 1];
+						otp_p->dd_param_x[jj + 1] =
+							temp_x;
+						temp_y =
+							otp_p->dd_param_y[jj];
+						otp_p->dd_param_y[jj] =
+							otp_p->dd_param_y[jj + 1];
+						otp_p->dd_param_y[jj + 1] =
+							temp_y;
+						temp_type =
+							otp_p->dd_param_type[jj];
+						otp_p->dd_param_type[jj] =
+							otp_p->dd_param_type[jj + 1];
+						otp_p->dd_param_type[jj + 1] =
+							temp_type;
+					}
+				}
+			}
+			column = 0;
+		}
+
+		//write SRAM
+		gc5025_write_reg(client, 0xfe, 0x00);
+		gc5025_write_reg(client, 0x80, 0x50);
+		gc5025_write_reg(client, 0xfe, 0x01);
+		gc5025_write_reg(client, 0xa8, 0x00);
+		gc5025_write_reg(client, 0x9d, 0x04);
+		gc5025_write_reg(client, 0xbe, 0x00);
+		gc5025_write_reg(client, 0xa9, 0x01);
+
+		for (i = 0; i < otp_p->dd_cnt; i++) {
+			temp_val0 = otp_p->dd_param_x[i] & 0x00ff;
+			temp_val1 = ((otp_p->dd_param_y[i] << 4) & 0x00f0) +
+				((otp_p->dd_param_x[i] >> 8) & 0x000f);
+			temp_val2 = (otp_p->dd_param_y[i] >> 4) & 0xff;
+			gc5025_write_reg(client, 0xaa, i);
+			gc5025_write_reg(client, 0xac, temp_val0);
+			gc5025_write_reg(client, 0xac, temp_val1);
+			gc5025_write_reg(client, 0xac, temp_val2);
+			gc5025_write_reg(client, 0xac,
+				otp_p->dd_param_type[i]);
+		}
+		gc5025_write_reg(client, 0xbe, 0x01);
+		gc5025_write_reg(client, 0xfe, 0x00);
+	}
+	return 0;
+}
+
+static int __gc5025_start_stream(struct gc5025 *gc5025)
+{
+	int ret;
+
+	ret = gc5025_write_array(gc5025->client, gc5025_global_regs);
+	if (ret)
+		return ret;
+	ret = gc5025_write_array(gc5025->client, gc5025->cur_mode->reg_list);
+	if (ret)
+		return ret;
+
+	if (gc5025->DR_State) {
+		ret = gc5025_write_array(gc5025->client,
+			gc5025_doublereset_reg);
+	} else {
+		ret = gc5025_write_array(gc5025->client,
+			gc5025_disable_doublereset_reg);
+	}
+	if (ret)
+		return ret;
+	/* In case these controls are set before streaming */
+	mutex_unlock(&gc5025->mutex);
+	ret = v4l2_ctrl_handler_setup(&gc5025->ctrl_handler);
+	mutex_lock(&gc5025->mutex);
+	if (ret)
+		return ret;
+
+	ret = gc5025_otp_enable(gc5025);
+	ret |= gc5025_apply_otp(gc5025);
+	ret |= gc5025_otp_disable(gc5025);
+	if (ret)
+		return ret;
+
+	ret = gc5025_write_reg(gc5025->client,
+		GC5025_REG_SET_PAGE,
+		GC5025_SET_PAGE_ONE);
+	ret |= gc5025_write_reg(gc5025->client,
+		GC5025_REG_CTRL_MODE,
+		GC5025_MODE_STREAMING);
+	return ret;
+}
+
+static int __gc5025_stop_stream(struct gc5025 *gc5025)
+{
+	int ret;
+
+	ret = gc5025_write_reg(gc5025->client,
+		GC5025_REG_SET_PAGE,
+		GC5025_SET_PAGE_ONE);
+	ret |= gc5025_write_reg(gc5025->client,
+		GC5025_REG_CTRL_MODE,
+		GC5025_MODE_SW_STANDBY);
+	return ret;
+}
+
+static int gc5025_s_stream(struct v4l2_subdev *sd, int on)
+{
+	struct gc5025 *gc5025 = to_gc5025(sd);
+	struct i2c_client *client = gc5025->client;
+	int ret = 0;
+
+	mutex_lock(&gc5025->mutex);
+	on = !!on;
+	if (on == gc5025->streaming)
+		goto unlock_and_return;
+
+	if (on) {
+		ret = pm_runtime_get_sync(&client->dev);
+		if (ret < 0) {
+			pm_runtime_put_noidle(&client->dev);
+			goto unlock_and_return;
+		}
+
+		ret = __gc5025_start_stream(gc5025);
+		if (ret) {
+			v4l2_err(sd, "start stream failed while write regs\n");
+			pm_runtime_put(&client->dev);
+			goto unlock_and_return;
+		}
+	} else {
+		__gc5025_stop_stream(gc5025);
+		pm_runtime_put(&client->dev);
+	}
+
+	gc5025->streaming = on;
+
+unlock_and_return:
+	mutex_unlock(&gc5025->mutex);
+
+	return ret;
+}
+
+/* Calculate the delay in us by clock rate and clock cycles */
+static inline u32 gc5025_cal_delay(u32 cycles)
+{
+	return DIV_ROUND_UP(cycles, GC5025_XVCLK_FREQ / 1000 / 1000);
+}
+
+static int __gc5025_power_on(struct gc5025 *gc5025)
+{
+	int ret;
+	u32 delay_us;
+	struct device *dev = &gc5025->client->dev;
+
+	if (!IS_ERR_OR_NULL(gc5025->pins_default)) {
+		ret = pinctrl_select_state(gc5025->pinctrl,
+					   gc5025->pins_default);
+		if (ret < 0)
+			dev_err(dev, "could not set pins\n");
+	}
+
+	ret = clk_prepare_enable(gc5025->xvclk);
+	if (ret < 0) {
+		dev_err(dev, "Failed to enable xvclk\n");
+		return ret;
+	}
+
+	if (!IS_ERR(gc5025->reset_gpio))
+		gpiod_set_value_cansleep(gc5025->reset_gpio, 1);
+
+	ret = regulator_bulk_enable(GC5025_NUM_SUPPLIES, gc5025->supplies);
+	if (ret < 0) {
+		dev_err(dev, "Failed to enable regulators\n");
+		goto disable_clk;
+	}
+
+	usleep_range(1000, 1100);
+	if (!IS_ERR(gc5025->reset_gpio))
+		gpiod_set_value_cansleep(gc5025->reset_gpio, 0);
+
+	usleep_range(500, 1000);
+	if (!IS_ERR(gc5025->pwdn_gpio))
+		gpiod_set_value_cansleep(gc5025->pwdn_gpio, 0);
+
+	/* 8192 cycles prior to first SCCB transaction */
+	delay_us = gc5025_cal_delay(8192);
+	usleep_range(delay_us, delay_us * 2);
+
+	return 0;
+
+disable_clk:
+	clk_disable_unprepare(gc5025->xvclk);
+
+	return ret;
+}
+
+static void __gc5025_power_off(struct gc5025 *gc5025)
+{
+	int ret;
+
+	if (!IS_ERR(gc5025->pwdn_gpio))
+		gpiod_set_value_cansleep(gc5025->pwdn_gpio, 1);
+	clk_disable_unprepare(gc5025->xvclk);
+	if (!IS_ERR(gc5025->reset_gpio))
+		gpiod_set_value_cansleep(gc5025->reset_gpio, 1);
+	if (!IS_ERR_OR_NULL(gc5025->pins_sleep)) {
+		ret = pinctrl_select_state(gc5025->pinctrl,
+			gc5025->pins_sleep);
+		if (ret < 0)
+			dev_dbg(&gc5025->client->dev, "could not set pins\n");
+	}
+	regulator_bulk_disable(GC5025_NUM_SUPPLIES, gc5025->supplies);
+}
+
+static int gc5025_runtime_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct gc5025 *gc5025 = to_gc5025(sd);
+
+	return __gc5025_power_on(gc5025);
+}
+
+static int gc5025_runtime_suspend(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct gc5025 *gc5025 = to_gc5025(sd);
+
+	__gc5025_power_off(gc5025);
+
+	return 0;
+}
+
+#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
+static int gc5025_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+	struct gc5025 *gc5025 = to_gc5025(sd);
+	struct v4l2_mbus_framefmt *try_fmt =
+		v4l2_subdev_get_try_format(sd, fh->pad, 0);
+	const struct gc5025_mode *def_mode = &supported_modes[0];
+
+	mutex_lock(&gc5025->mutex);
+	/* Initialize try_fmt */
+	try_fmt->width = def_mode->width;
+	try_fmt->height = def_mode->height;
+	try_fmt->code = MEDIA_BUS_FMT_SRGGB10_1X10;
+	try_fmt->field = V4L2_FIELD_NONE;
+
+	mutex_unlock(&gc5025->mutex);
+	/* No crop or compose */
+
+	return 0;
+}
+#endif
+
+static const struct dev_pm_ops gc5025_pm_ops = {
+	SET_RUNTIME_PM_OPS(gc5025_runtime_suspend,
+			   gc5025_runtime_resume, NULL)
+};
+
+#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
+static const struct v4l2_subdev_internal_ops gc5025_internal_ops = {
+	.open = gc5025_open,
+};
+#endif
+
+static const struct v4l2_subdev_core_ops gc5025_core_ops = {
+	.ioctl = gc5025_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl32 = gc5025_compat_ioctl32,
+#endif
+};
+
+static const struct v4l2_subdev_video_ops gc5025_video_ops = {
+	.s_stream = gc5025_s_stream,
+	.g_frame_interval = gc5025_g_frame_interval,
+};
+
+static const struct v4l2_subdev_pad_ops gc5025_pad_ops = {
+	.enum_mbus_code = gc5025_enum_mbus_code,
+	.enum_frame_size = gc5025_enum_frame_sizes,
+	.get_fmt = gc5025_get_fmt,
+	.set_fmt = gc5025_set_fmt,
+};
+
+static const struct v4l2_subdev_ops gc5025_subdev_ops = {
+	.core	= &gc5025_core_ops,
+	.video	= &gc5025_video_ops,
+	.pad	= &gc5025_pad_ops,
+};
+
+static int gc5025_set_exposure_reg(struct gc5025 *gc5025, u32 exposure)
+{
+	u32 caltime = 0;
+	int ret = 0;
+
+	caltime = exposure / 2;
+	caltime = caltime * 2;
+	gc5025->Dgain_ratio = 256 * exposure / caltime;
+	ret = gc5025_write_reg(gc5025->client,
+		GC5025_REG_SET_PAGE,
+		GC5025_SET_PAGE_ONE);
+	if (!gc5025->DR_State) {
+		if (caltime <= 10)
+			ret |= gc5025_write_reg(gc5025->client, 0xd9, 0xdd);
+		else
+			ret |= gc5025_write_reg(gc5025->client, 0xd9, 0xaa);
+	}
+	ret |= gc5025_write_reg(gc5025->client,
+		GC5025_REG_EXPOSURE_H,
+		(caltime >> 8) & 0x3F);
+	ret |= gc5025_write_reg(gc5025->client,
+		GC5025_REG_EXPOSURE_L,
+		caltime & 0xFF);
+	return ret;
+}
+
+#define GC5025_ANALOG_GAIN_1 64    /*1.00x*/
+#define GC5025_ANALOG_GAIN_2 92   // 1.445x
+
+static int gc5025_set_gain_reg(struct gc5025 *gc5025, u32 a_gain)
+{
+	int ret = 0;
+	u32 temp = 0;
+
+	if (a_gain < 0x40)
+		a_gain = 0x40;
+	ret = gc5025_write_reg(gc5025->client,
+		GC5025_REG_SET_PAGE,
+		GC5025_SET_PAGE_ONE);
+	if (a_gain >= GC5025_ANALOG_GAIN_1 &&
+		a_gain < GC5025_ANALOG_GAIN_2) {
+		ret |= gc5025_write_reg(gc5025->client,
+			GC5025_REG_AGAIN, 0x0);
+		temp = a_gain;
+	} else {
+		ret |= gc5025_write_reg(gc5025->client,
+			GC5025_REG_AGAIN, 0x1);
+		temp = 64 * a_gain / GC5025_ANALOG_GAIN_2;
+	}
+	temp = temp * gc5025->Dgain_ratio / 256;
+	ret |= gc5025_write_reg(gc5025->client,
+		GC5025_REG_DGAIN_INT,
+		temp >> 6);
+	ret |= gc5025_write_reg(gc5025->client,
+		GC5025_REG_DGAIN_FRAC,
+		(temp << 2) & 0xfc);
+	return ret;
+}
+
+static int gc5025_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct gc5025 *gc5025 = container_of(ctrl->handler,
+					     struct gc5025, ctrl_handler);
+	struct i2c_client *client = gc5025->client;
+	s64 max;
+	int ret = 0;
+
+	/* Propagate change of current control to all related controls */
+	switch (ctrl->id) {
+	case V4L2_CID_VBLANK:
+		/* Update max exposure while meeting expected vblanking */
+		max = gc5025->cur_mode->height + ctrl->val + 32 - 4;
+		__v4l2_ctrl_modify_range(gc5025->exposure,
+			gc5025->exposure->minimum, max,
+			gc5025->exposure->step,
+			gc5025->exposure->default_value);
+		break;
+	}
+
+	if (pm_runtime_get(&client->dev) <= 0)
+		return 0;
+
+	switch (ctrl->id) {
+	case V4L2_CID_EXPOSURE:
+		/* 4 least significant bits of expsoure are fractional part */
+		ret = gc5025_set_exposure_reg(gc5025, ctrl->val);
+		break;
+	case V4L2_CID_ANALOGUE_GAIN:
+		ret = gc5025_set_gain_reg(gc5025, ctrl->val);
+		break;
+	case V4L2_CID_VBLANK:
+		ret = gc5025_write_reg(gc5025->client,
+			GC5025_REG_SET_PAGE,
+			GC5025_SET_PAGE_ONE);
+		ret |= gc5025_write_reg(gc5025->client,
+			GC5025_REG_VTS_H,
+			(ctrl->val >> 8) & 0xff);
+		ret |= gc5025_write_reg(gc5025->client,
+			GC5025_REG_VTS_L,
+			ctrl->val & 0xff);
+		break;
+	default:
+		dev_warn(&client->dev, "%s Unhandled id:0x%x, val:0x%x\n",
+			__func__, ctrl->id, ctrl->val);
+		break;
+	}
+
+	pm_runtime_put(&client->dev);
+
+	return ret;
+}
+
+static const struct v4l2_ctrl_ops gc5025_ctrl_ops = {
+	.s_ctrl = gc5025_set_ctrl,
+};
+
+static int gc5025_initialize_controls(struct gc5025 *gc5025)
+{
+	const struct gc5025_mode *mode;
+	struct v4l2_ctrl_handler *handler;
+	struct v4l2_ctrl *ctrl;
+	s64 exposure_max, vblank_def;
+	u32 h_blank;
+	int ret;
+
+	handler = &gc5025->ctrl_handler;
+	mode = gc5025->cur_mode;
+	ret = v4l2_ctrl_handler_init(handler, 8);
+	if (ret)
+		return ret;
+	handler->lock = &gc5025->mutex;
+
+	ctrl = v4l2_ctrl_new_int_menu(handler, NULL, V4L2_CID_LINK_FREQ,
+		0, 0, link_freq_menu_items);
+	if (ctrl)
+		ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+	v4l2_ctrl_new_std(handler, NULL, V4L2_CID_PIXEL_RATE,
+		0, GC5025_PIXEL_RATE, 1, GC5025_PIXEL_RATE);
+
+	h_blank = mode->hts_def - mode->width;
+	gc5025->hblank = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK,
+		h_blank, h_blank, 1, h_blank);
+	if (gc5025->hblank)
+		gc5025->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+	vblank_def = mode->vts_def - mode->height;
+	gc5025->vblank = v4l2_ctrl_new_std(handler, &gc5025_ctrl_ops,
+		V4L2_CID_VBLANK, vblank_def,
+		GC5025_VTS_MAX - mode->height,
+		1, vblank_def);
+
+	exposure_max = mode->vts_def - 4;
+	gc5025->exposure = v4l2_ctrl_new_std(handler, &gc5025_ctrl_ops,
+		V4L2_CID_EXPOSURE, GC5025_EXPOSURE_MIN,
+		exposure_max, GC5025_EXPOSURE_STEP,
+		mode->exp_def);
+
+	gc5025->anal_gain = v4l2_ctrl_new_std(handler, &gc5025_ctrl_ops,
+		V4L2_CID_ANALOGUE_GAIN, GC5025_GAIN_MIN,
+		GC5025_GAIN_MAX, GC5025_GAIN_STEP,
+		GC5025_GAIN_DEFAULT);
+
+	if (handler->error) {
+		ret = handler->error;
+		dev_err(&gc5025->client->dev,
+			"Failed to init controls(%d)\n", ret);
+		goto err_free_handler;
+	}
+
+	gc5025->subdev.ctrl_handler = handler;
+
+	return 0;
+
+err_free_handler:
+	v4l2_ctrl_handler_free(handler);
+
+	return ret;
+}
+
+static int gc5025_check_sensor_id(struct gc5025 *gc5025,
+	struct i2c_client *client)
+{
+	struct device *dev = &gc5025->client->dev;
+	u16 id = 0;
+	u8 reg_H = 0;
+	u8 reg_L = 0;
+	u8 flag_doublereset = 0;
+	u8 flag_GC5025A = 0;
+	int ret;
+
+	ret = gc5025_read_reg(client, GC5025_REG_CHIP_ID_H, &reg_H);
+	ret |= gc5025_read_reg(client, GC5025_REG_CHIP_ID_L, &reg_L);
+	id = ((reg_H << 8) & 0xff00) | (reg_L & 0xff);
+	if (id != CHIP_ID) {
+		dev_err(dev, "Unexpected sensor id(%06x), ret(%d)\n", id, ret);
+		return ret;
+	}
+	ret |= gc5025_read_reg(client, 0x26, &flag_doublereset);
+	ret |= gc5025_read_reg(client, 0x27, &flag_GC5025A);
+	if ((flag_GC5025A & 0x01) == 0x01) {
+		dev_warn(dev, "GC5025A sensor!\n");
+		gc5025->DR_State = false;
+	} else {
+		if ((flag_doublereset & 0x03) == 0x01) {
+			gc5025->DR_State = false;
+			dev_warn(dev, "GC5025 double reset off\n");
+		} else {
+			gc5025->DR_State = true;
+			dev_warn(dev, "GC5025 double reset on\n");
+		}
+	}
+	return ret;
+}
+
+static int gc5025_configure_regulators(struct gc5025 *gc5025)
+{
+	unsigned int i;
+
+	for (i = 0; i < GC5025_NUM_SUPPLIES; i++)
+		gc5025->supplies[i].supply = gc5025_supply_names[i];
+
+	return devm_regulator_bulk_get(&gc5025->client->dev,
+		GC5025_NUM_SUPPLIES,
+		gc5025->supplies);
+}
+
+static int gc5025_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	struct device *dev = &client->dev;
+	struct device_node *node = dev->of_node;
+	struct gc5025 *gc5025;
+	struct v4l2_subdev *sd;
+	char facing[2];
+	int ret;
+
+	gc5025 = devm_kzalloc(dev, sizeof(*gc5025), GFP_KERNEL);
+	if (!gc5025)
+		return -ENOMEM;
+
+	ret = of_property_read_u32(node, RKMODULE_CAMERA_MODULE_INDEX,
+		&gc5025->module_index);
+	ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_FACING,
+		&gc5025->module_facing);
+	ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_NAME,
+		&gc5025->module_name);
+	ret |= of_property_read_string(node, RKMODULE_CAMERA_LENS_NAME,
+		&gc5025->len_name);
+	if (ret) {
+		dev_err(dev, "could not get module information!\n");
+		return -EINVAL;
+	}
+	gc5025->client = client;
+	gc5025->cur_mode = &supported_modes[0];
+
+	gc5025->xvclk = devm_clk_get(dev, "xvclk");
+	if (IS_ERR(gc5025->xvclk)) {
+		dev_err(dev, "Failed to get xvclk\n");
+		return -EINVAL;
+	}
+	ret = clk_set_rate(gc5025->xvclk, GC5025_XVCLK_FREQ);
+	if (ret < 0) {
+		dev_err(dev, "Failed to set xvclk rate (24MHz)\n");
+		return ret;
+	}
+	if (clk_get_rate(gc5025->xvclk) != GC5025_XVCLK_FREQ)
+		dev_warn(dev, "xvclk mismatched, modes are based on 24MHz\n");
+
+	gc5025->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(gc5025->reset_gpio))
+		dev_warn(dev, "Failed to get reset-gpios\n");
+
+	gc5025->pwdn_gpio = devm_gpiod_get(dev, "pwdn", GPIOD_OUT_LOW);
+	if (IS_ERR(gc5025->pwdn_gpio))
+		dev_warn(dev, "Failed to get pwdn-gpios\n");
+
+	ret = gc5025_configure_regulators(gc5025);
+	if (ret) {
+		dev_err(dev, "Failed to get power regulators\n");
+		return ret;
+	}
+
+	gc5025->pinctrl = devm_pinctrl_get(dev);
+	if (!IS_ERR(gc5025->pinctrl)) {
+		gc5025->pins_default =
+			pinctrl_lookup_state(gc5025->pinctrl,
+					     OF_CAMERA_PINCTRL_STATE_DEFAULT);
+		if (IS_ERR(gc5025->pins_default))
+			dev_err(dev, "could not get default pinstate\n");
+
+		gc5025->pins_sleep =
+			pinctrl_lookup_state(gc5025->pinctrl,
+					     OF_CAMERA_PINCTRL_STATE_SLEEP);
+		if (IS_ERR(gc5025->pins_sleep))
+			dev_err(dev, "could not get sleep pinstate\n");
+	}
+
+	mutex_init(&gc5025->mutex);
+
+	sd = &gc5025->subdev;
+	v4l2_i2c_subdev_init(sd, client, &gc5025_subdev_ops);
+	ret = gc5025_initialize_controls(gc5025);
+	if (ret)
+		goto err_destroy_mutex;
+
+	ret = __gc5025_power_on(gc5025);
+	if (ret)
+		goto err_free_handler;
+
+	ret = gc5025_check_sensor_id(gc5025, client);
+	if (ret)
+		goto err_power_off;
+
+	gc5025_otp_enable(gc5025);
+	gc5025_otp_read(gc5025);
+	gc5025_otp_disable(gc5025);
+
+#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
+	sd->internal_ops = &gc5025_internal_ops;
+	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+#endif
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	gc5025->pad.flags = MEDIA_PAD_FL_SOURCE;
+	sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV_SENSOR;
+	ret = media_entity_init(&sd->entity, 1, &gc5025->pad, 0);
+	if (ret < 0)
+		goto err_power_off;
+#endif
+
+	memset(facing, 0, sizeof(facing));
+	if (strcmp(gc5025->module_facing, "back") == 0)
+		facing[0] = 'b';
+	else
+		facing[0] = 'f';
+
+	snprintf(sd->name, sizeof(sd->name), "m%02d_%s_%s %s",
+		 gc5025->module_index, facing,
+		 GC5025_NAME, dev_name(sd->dev));
+	ret = v4l2_async_register_subdev_sensor_common(sd);
+	if (ret) {
+		dev_err(dev, "v4l2 async register subdev failed\n");
+		goto err_clean_entity;
+	}
+
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+	pm_runtime_idle(dev);
+
+	return 0;
+
+err_clean_entity:
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	media_entity_cleanup(&sd->entity);
+#endif
+err_power_off:
+	__gc5025_power_off(gc5025);
+err_free_handler:
+	v4l2_ctrl_handler_free(&gc5025->ctrl_handler);
+err_destroy_mutex:
+	mutex_destroy(&gc5025->mutex);
+
+	return ret;
+}
+
+static int gc5025_remove(struct i2c_client *client)
+{
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct gc5025 *gc5025 = to_gc5025(sd);
+
+	v4l2_async_unregister_subdev(sd);
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	media_entity_cleanup(&sd->entity);
+#endif
+	v4l2_ctrl_handler_free(&gc5025->ctrl_handler);
+	mutex_destroy(&gc5025->mutex);
+
+	pm_runtime_disable(&client->dev);
+	if (!pm_runtime_status_suspended(&client->dev))
+		__gc5025_power_off(gc5025);
+	pm_runtime_set_suspended(&client->dev);
+
+	return 0;
+}
+
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id gc5025_of_match[] = {
+	{ .compatible = "galaxycore,gc5025" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, gc5025_of_match);
+#endif
+
+static const struct i2c_device_id gc5025_match_id[] = {
+	{ "galaxycore,gc5025", 0 },
+	{ },
+};
+
+static struct i2c_driver gc5025_i2c_driver = {
+	.driver = {
+		.name = GC5025_NAME,
+		.pm = &gc5025_pm_ops,
+		.of_match_table = of_match_ptr(gc5025_of_match),
+	},
+	.probe		= &gc5025_probe,
+	.remove		= &gc5025_remove,
+	.id_table	= gc5025_match_id,
+};
+
+static int __init sensor_mod_init(void)
+{
+	return i2c_add_driver(&gc5025_i2c_driver);
+}
+
+static void __exit sensor_mod_exit(void)
+{
+	i2c_del_driver(&gc5025_i2c_driver);
+}
+
+device_initcall_sync(sensor_mod_init);
+module_exit(sensor_mod_exit);
+
+MODULE_DESCRIPTION("GalaxyCore gc5025 sensor driver");
+MODULE_LICENSE("GPL v2");