diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 8ba096b8ebca..38aba3624669 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -690,6 +690,15 @@ config VIDEO_S5K6A3
 	  This is a V4L2 sensor driver for Samsung S5K6A3 raw
 	  camera sensor.
 
+config VIDEO_T4KA3
+	tristate "Toshiba T4KA3 sensor support"
+	depends on ACPI || COMPILE_TEST
+	depends on GPIOLIB
+	select V4L2_CCI_I2C
+	help
+	  This is a Video4Linux2 sensor driver for the Toshiba T4KA3 8 MP
+	  camera sensor.
+
 config VIDEO_VGXY61
 	tristate "ST VGXY61 sensor support"
 	select V4L2_CCI_I2C
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index fbb988bd067a..ad67ea33ce37 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -129,6 +129,7 @@ obj-$(CONFIG_VIDEO_SAA717X) += saa717x.o
 obj-$(CONFIG_VIDEO_SAA7185) += saa7185.o
 obj-$(CONFIG_VIDEO_SONY_BTF_MPX) += sony-btf-mpx.o
 obj-$(CONFIG_VIDEO_ST_MIPID02) += st-mipid02.o
+obj-$(CONFIG_VIDEO_T4KA3) += t4ka3.o
 obj-$(CONFIG_VIDEO_TC358743) += tc358743.o
 obj-$(CONFIG_VIDEO_TC358746) += tc358746.o
 obj-$(CONFIG_VIDEO_TDA1997X) += tda1997x.o
diff --git a/drivers/media/i2c/t4ka3.c b/drivers/media/i2c/t4ka3.c
new file mode 100644
index 000000000000..d53820434303
--- /dev/null
+++ b/drivers/media/i2c/t4ka3.c
@@ -0,0 +1,1119 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Support for T4KA3 8M camera sensor.
+ *
+ * Copyright (C) 2015 Intel Corporation. All Rights Reserved.
+ * Copyright (C) 2016 XiaoMi, Inc.
+ * Copyright (C) 2024 Hans de Goede <hansg@kernel.org>
+ */
+
+#include <linux/acpi.h>
+#include <linux/bits.h>
+#include <linux/delay.h>
+#include <linux/dev_printk.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include <linux/mutex.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+
+#include <media/media-entity.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-cci.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+#define T4KA3_NATIVE_WIDTH			3280
+#define T4KA3_NATIVE_HEIGHT			2464
+#define T4KA3_NATIVE_START_LEFT			0
+#define T4KA3_NATIVE_START_TOP			0
+#define T4KA3_ACTIVE_WIDTH			3280
+#define T4KA3_ACTIVE_HEIGHT			2460
+#define T4KA3_ACTIVE_START_LEFT			0
+#define T4KA3_ACTIVE_START_TOP			2
+#define T4KA3_MIN_CROP_WIDTH			2
+#define T4KA3_MIN_CROP_HEIGHT			2
+
+#define T4KA3_PIXELS_PER_LINE			3440
+#define T4KA3_LINES_PER_FRAME_30FPS		2492
+#define T4KA3_FPS				30
+#define T4KA3_PIXEL_RATE \
+	(T4KA3_PIXELS_PER_LINE * T4KA3_LINES_PER_FRAME_30FPS * T4KA3_FPS)
+
+/*
+ * TODO this really should be derived from the 19.2 MHz xvclk combined
+ * with the PLL settings. But without a datasheet this is the closest
+ * approximation possible.
+ *
+ * link-freq = pixel_rate * bpp / (lanes * 2)
+ * (lanes * 2) because CSI lanes use double-data-rate (DDR) signalling.
+ * bpp = 10 and lanes = 4
+ */
+#define T4KA3_LINK_FREQ				((u64)T4KA3_PIXEL_RATE * 10 / 8)
+
+/* For enum_frame_size() full-size + binned-/quarter-size */
+#define T4KA3_FRAME_SIZES			2
+
+
+#define T4KA3_REG_PRODUCT_ID_HIGH		CCI_REG8(0x0000)
+#define T4KA3_REG_PRODUCT_ID_LOW		CCI_REG8(0x0001)
+#define T4KA3_PRODUCT_ID			0x1490
+
+#define T4KA3_REG_STREAM			CCI_REG8(0x0100)
+#define T4KA3_REG_IMG_ORIENTATION		CCI_REG8(0x0101)
+#define T4KA3_HFLIP_BIT				BIT(0)
+#define T4KA3_VFLIP_BIT				BIT(1)
+#define T4KA3_REG_PARAM_HOLD			CCI_REG8(0x0104)
+#define T4KA3_REG_COARSE_INTEGRATION_TIME	CCI_REG16(0x0202)
+#define T4KA3_COARSE_INTEGRATION_TIME_MARGIN	6
+#define T4KA3_REG_DIGGAIN_GREEN_R		CCI_REG16(0x020e)
+#define T4KA3_REG_DIGGAIN_RED			CCI_REG16(0x0210)
+#define T4KA3_REG_DIGGAIN_BLUE			CCI_REG16(0x0212)
+#define T4KA3_REG_DIGGAIN_GREEN_B		CCI_REG16(0x0214)
+#define T4KA3_REG_GLOBAL_GAIN			CCI_REG16(0x0234)
+#define T4KA3_MIN_GLOBAL_GAIN_SUPPORTED		0x0080
+#define T4KA3_MAX_GLOBAL_GAIN_SUPPORTED		0x07ff
+#define T4KA3_REG_FRAME_LENGTH_LINES		CCI_REG16(0x0340) /* aka VTS */
+/* FIXME: need a datasheet to verify the min + max vblank values */
+#define T4KA3_MIN_VBLANK			4
+#define T4KA3_MAX_VBLANK			0xffff
+#define T4KA3_REG_PIXELS_PER_LINE		CCI_REG16(0x0342) /* aka HTS */
+/* These 2 being horz/vert start is a guess (no datasheet), always 0 */
+#define T4KA3_REG_HORZ_START			CCI_REG16(0x0344)
+#define T4KA3_REG_VERT_START			CCI_REG16(0x0346)
+/* Always 3279 (T4KA3_NATIVE_WIDTH - 1, window is used to crop */
+#define T4KA3_REG_HORZ_END			CCI_REG16(0x0348)
+/* Always 2463 (T4KA3_NATIVE_HEIGHT - 1, window is used to crop */
+#define T4KA3_REG_VERT_END			CCI_REG16(0x034a)
+/* Output size (after cropping/window) */
+#define T4KA3_REG_HORZ_OUTPUT_SIZE		CCI_REG16(0x034c)
+#define T4KA3_REG_VERT_OUTPUT_SIZE		CCI_REG16(0x034e)
+/* Window/crop start + size *after* binning */
+#define T4KA3_REG_WIN_START_X			CCI_REG16(0x0408)
+#define T4KA3_REG_WIN_START_Y			CCI_REG16(0x040a)
+#define T4KA3_REG_WIN_WIDTH			CCI_REG16(0x040c)
+#define T4KA3_REG_WIN_HEIGHT			CCI_REG16(0x040e)
+#define T4KA3_REG_TEST_PATTERN_MODE		CCI_REG8(0x0601)
+/* Unknown register at address 0x0900 */
+#define T4KA3_REG_0900				CCI_REG8(0x0900)
+#define T4KA3_REG_BINNING			CCI_REG8(0x0901)
+#define T4KA3_BINNING_VAL(b)			(((b) << 4) | (b))
+
+struct t4ka3_ctrls {
+	struct v4l2_ctrl_handler handler;
+	struct v4l2_ctrl *hflip;
+	struct v4l2_ctrl *vflip;
+	struct v4l2_ctrl *vblank;
+	struct v4l2_ctrl *hblank;
+	struct v4l2_ctrl *exposure;
+	struct v4l2_ctrl *test_pattern;
+	struct v4l2_ctrl *link_freq;
+	struct v4l2_ctrl *gain;
+};
+
+struct t4ka3_mode {
+	struct v4l2_rect		crop;
+	struct v4l2_mbus_framefmt	fmt;
+	int				binning;
+	u16				win_x;
+	u16				win_y;
+};
+
+struct t4ka3_data {
+	struct v4l2_subdev sd;
+	struct media_pad pad;
+	struct mutex lock; /* serialize sensor's ioctl */
+	struct t4ka3_ctrls ctrls;
+	struct t4ka3_mode mode;
+	struct device *dev;
+	struct regmap *regmap;
+	struct gpio_desc *powerdown_gpio;
+	struct gpio_desc *reset_gpio;
+	s64 link_freq[1];
+	int streaming;
+};
+
+/* init settings */
+static const struct cci_reg_sequence t4ka3_init_config[] = {
+	{CCI_REG8(0x4136), 0x13},
+	{CCI_REG8(0x4137), 0x33},
+	{CCI_REG8(0x3094), 0x01},
+	{CCI_REG8(0x0233), 0x01},
+	{CCI_REG8(0x4B06), 0x01},
+	{CCI_REG8(0x4B07), 0x01},
+	{CCI_REG8(0x3028), 0x01},
+	{CCI_REG8(0x3032), 0x14},
+	{CCI_REG8(0x305C), 0x0C},
+	{CCI_REG8(0x306D), 0x0A},
+	{CCI_REG8(0x3071), 0xFA},
+	{CCI_REG8(0x307E), 0x0A},
+	{CCI_REG8(0x307F), 0xFC},
+	{CCI_REG8(0x3091), 0x04},
+	{CCI_REG8(0x3092), 0x60},
+	{CCI_REG8(0x3096), 0xC0},
+	{CCI_REG8(0x3100), 0x07},
+	{CCI_REG8(0x3101), 0x4C},
+	{CCI_REG8(0x3118), 0xCC},
+	{CCI_REG8(0x3139), 0x06},
+	{CCI_REG8(0x313A), 0x06},
+	{CCI_REG8(0x313B), 0x04},
+	{CCI_REG8(0x3143), 0x02},
+	{CCI_REG8(0x314F), 0x0E},
+	{CCI_REG8(0x3169), 0x99},
+	{CCI_REG8(0x316A), 0x99},
+	{CCI_REG8(0x3171), 0x05},
+	{CCI_REG8(0x31A1), 0xA7},
+	{CCI_REG8(0x31A2), 0x9C},
+	{CCI_REG8(0x31A3), 0x8F},
+	{CCI_REG8(0x31A4), 0x75},
+	{CCI_REG8(0x31A5), 0xEE},
+	{CCI_REG8(0x31A6), 0xEA},
+	{CCI_REG8(0x31A7), 0xE4},
+	{CCI_REG8(0x31A8), 0xE4},
+	{CCI_REG8(0x31DF), 0x05},
+	{CCI_REG8(0x31EC), 0x1B},
+	{CCI_REG8(0x31ED), 0x1B},
+	{CCI_REG8(0x31EE), 0x1B},
+	{CCI_REG8(0x31F0), 0x1B},
+	{CCI_REG8(0x31F1), 0x1B},
+	{CCI_REG8(0x31F2), 0x1B},
+	{CCI_REG8(0x3204), 0x3F},
+	{CCI_REG8(0x3205), 0x03},
+	{CCI_REG8(0x3210), 0x01},
+	{CCI_REG8(0x3216), 0x68},
+	{CCI_REG8(0x3217), 0x58},
+	{CCI_REG8(0x3218), 0x58},
+	{CCI_REG8(0x321A), 0x68},
+	{CCI_REG8(0x321B), 0x60},
+	{CCI_REG8(0x3238), 0x03},
+	{CCI_REG8(0x3239), 0x03},
+	{CCI_REG8(0x323A), 0x05},
+	{CCI_REG8(0x323B), 0x06},
+	{CCI_REG8(0x3243), 0x03},
+	{CCI_REG8(0x3244), 0x08},
+	{CCI_REG8(0x3245), 0x01},
+	{CCI_REG8(0x3307), 0x19},
+	{CCI_REG8(0x3308), 0x19},
+	{CCI_REG8(0x3320), 0x01},
+	{CCI_REG8(0x3326), 0x15},
+	{CCI_REG8(0x3327), 0x0D},
+	{CCI_REG8(0x3328), 0x01},
+	{CCI_REG8(0x3380), 0x01},
+	{CCI_REG8(0x339E), 0x07},
+	{CCI_REG8(0x3424), 0x00},
+	{CCI_REG8(0x343C), 0x01},
+	{CCI_REG8(0x3398), 0x04},
+	{CCI_REG8(0x343A), 0x10},
+	{CCI_REG8(0x339A), 0x22},
+	{CCI_REG8(0x33B4), 0x00},
+	{CCI_REG8(0x3393), 0x01},
+	{CCI_REG8(0x33B3), 0x6E},
+	{CCI_REG8(0x3433), 0x06},
+	{CCI_REG8(0x3433), 0x00},
+	{CCI_REG8(0x33B3), 0x00},
+	{CCI_REG8(0x3393), 0x03},
+	{CCI_REG8(0x33B4), 0x03},
+	{CCI_REG8(0x343A), 0x00},
+	{CCI_REG8(0x339A), 0x00},
+	{CCI_REG8(0x3398), 0x00}
+};
+
+static const struct cci_reg_sequence t4ka3_pre_mode_set_regs[] = {
+	{CCI_REG8(0x0112), 0x0A},
+	{CCI_REG8(0x0113), 0x0A},
+	{CCI_REG8(0x0114), 0x03},
+	{CCI_REG8(0x4136), 0x13},
+	{CCI_REG8(0x4137), 0x33},
+	{CCI_REG8(0x0820), 0x0A},
+	{CCI_REG8(0x0821), 0x0D},
+	{CCI_REG8(0x0822), 0x00},
+	{CCI_REG8(0x0823), 0x00},
+	{CCI_REG8(0x0301), 0x0A},
+	{CCI_REG8(0x0303), 0x01},
+	{CCI_REG8(0x0305), 0x04},
+	{CCI_REG8(0x0306), 0x02},
+	{CCI_REG8(0x0307), 0x18},
+	{CCI_REG8(0x030B), 0x01},
+};
+
+static const struct cci_reg_sequence t4ka3_post_mode_set_regs[] = {
+	{CCI_REG8(0x0902), 0x00},
+	{CCI_REG8(0x4220), 0x00},
+	{CCI_REG8(0x4222), 0x01},
+	{CCI_REG8(0x3380), 0x01},
+	{CCI_REG8(0x3090), 0x88},
+	{CCI_REG8(0x3394), 0x20},
+	{CCI_REG8(0x3090), 0x08},
+	{CCI_REG8(0x3394), 0x10}
+};
+
+static inline struct t4ka3_data *to_t4ka3_sensor(struct v4l2_subdev *sd)
+{
+	return container_of(sd, struct t4ka3_data, sd);
+}
+
+static inline struct t4ka3_data *ctrl_to_t4ka3(struct v4l2_ctrl *ctrl)
+{
+	return container_of(ctrl->handler, struct t4ka3_data, ctrls.handler);
+}
+
+/* T4KA3 default GRBG */
+static const int t4ka3_hv_flip_bayer_order[] = {
+	MEDIA_BUS_FMT_SGRBG10_1X10,
+	MEDIA_BUS_FMT_SBGGR10_1X10,
+	MEDIA_BUS_FMT_SRGGB10_1X10,
+	MEDIA_BUS_FMT_SGBRG10_1X10,
+};
+
+static const struct v4l2_rect t4ka3_default_crop = {
+	.left = T4KA3_ACTIVE_START_LEFT,
+	.top = T4KA3_ACTIVE_START_TOP,
+	.width = T4KA3_ACTIVE_WIDTH,
+	.height = T4KA3_ACTIVE_HEIGHT,
+};
+
+static int t4ka3_detect(struct t4ka3_data *sensor, u16 *id);
+
+static void t4ka3_set_bayer_order(struct t4ka3_data *sensor,
+				  struct v4l2_mbus_framefmt *fmt)
+{
+	int hv_flip = 0;
+
+	if (sensor->ctrls.vflip && sensor->ctrls.vflip->val)
+		hv_flip += 1;
+
+	if (sensor->ctrls.hflip && sensor->ctrls.hflip->val)
+		hv_flip += 2;
+
+	fmt->code = t4ka3_hv_flip_bayer_order[hv_flip];
+}
+
+static int t4ka3_update_exposure_range(struct t4ka3_data *sensor)
+{
+	int exp_max = sensor->mode.fmt.height + sensor->ctrls.vblank->val -
+		      T4KA3_COARSE_INTEGRATION_TIME_MARGIN;
+
+	return __v4l2_ctrl_modify_range(sensor->ctrls.exposure, 0, exp_max,
+					1, exp_max);
+}
+
+static struct v4l2_rect *
+__t4ka3_get_pad_crop(struct t4ka3_data *sensor,
+		      struct v4l2_subdev_state *state,
+		      unsigned int pad,
+		      enum v4l2_subdev_format_whence which)
+{
+	if (which == V4L2_SUBDEV_FORMAT_TRY)
+		return v4l2_subdev_state_get_crop(state, pad);
+
+	return &sensor->mode.crop;
+}
+
+static struct v4l2_mbus_framefmt *
+__t4ka3_get_pad_format(struct t4ka3_data *sensor,
+		       struct v4l2_subdev_state *sd_state, unsigned int pad,
+		       enum v4l2_subdev_format_whence which)
+{
+	if (which == V4L2_SUBDEV_FORMAT_TRY)
+		return v4l2_subdev_state_get_format(sd_state, pad);
+
+	return &sensor->mode.fmt;
+}
+
+static void t4ka3_fill_format(struct t4ka3_data *sensor,
+			      struct v4l2_mbus_framefmt *fmt,
+			      unsigned int width, unsigned int height)
+{
+	memset(fmt, 0, sizeof(*fmt));
+	fmt->width = width;
+	fmt->height = height;
+	fmt->field = V4L2_FIELD_NONE;
+	fmt->colorspace = V4L2_COLORSPACE_SRGB;
+	t4ka3_set_bayer_order(sensor, fmt);
+}
+
+static void t4ka3_calc_mode(struct t4ka3_data *sensor)
+{
+	int width = sensor->mode.fmt.width;
+	int height = sensor->mode.fmt.height;
+	int binning;
+
+	if (width  <= (sensor->mode.crop.width / 2) &&
+	    height <= (sensor->mode.crop.height / 2))
+		binning = 2;
+	else
+		binning = 1;
+
+	width *= binning;
+	height *= binning;
+
+	sensor->mode.binning = binning;
+	sensor->mode.win_x = (sensor->mode.crop.left +
+				(sensor->mode.crop.width - width) / 2) & ~1;
+	sensor->mode.win_y = (sensor->mode.crop.top +
+				(sensor->mode.crop.height - height) / 2) & ~1;
+	/*
+	 * t4ka's window is done after binning, but must still be a multiple of 2 ?
+	 * Round up to avoid top 2 black lines in 1640x1230 (quarter res) case.
+	 */
+	sensor->mode.win_x = DIV_ROUND_UP(sensor->mode.win_x, binning);
+	sensor->mode.win_y = DIV_ROUND_UP(sensor->mode.win_y, binning);
+}
+
+static void t4ka3_get_vblank_limits(struct t4ka3_data *sensor, int *min, int *max, int *def)
+{
+	*min = T4KA3_MIN_VBLANK + (sensor->mode.binning - 1) * sensor->mode.fmt.height;
+	*max = T4KA3_MAX_VBLANK - sensor->mode.fmt.height;
+	*def = T4KA3_LINES_PER_FRAME_30FPS - sensor->mode.fmt.height;
+}
+
+static int t4ka3_set_pad_format(struct v4l2_subdev *sd,
+				struct v4l2_subdev_state *sd_state,
+				struct v4l2_subdev_format *format)
+{
+	struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+	struct v4l2_mbus_framefmt *try_fmt;
+	const struct v4l2_rect *crop;
+	unsigned int width, height;
+	int min, max, def, ret = 0;
+
+	crop = __t4ka3_get_pad_crop(sensor, sd_state, format->pad, format->which);
+
+	/* Limit set_fmt max size to crop width / height */
+	width = clamp_val(ALIGN(format->format.width, 2),
+			  T4KA3_MIN_CROP_WIDTH, crop->width);
+	height = clamp_val(ALIGN(format->format.height, 2),
+			   T4KA3_MIN_CROP_HEIGHT, crop->height);
+	t4ka3_fill_format(sensor, &format->format, width, height);
+
+	if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
+		try_fmt = v4l2_subdev_state_get_format(sd_state, 0);
+		*try_fmt = format->format;
+		return 0;
+	}
+
+	mutex_lock(&sensor->lock);
+
+	if (sensor->streaming) {
+		ret = -EBUSY;
+		goto unlock;
+	}
+
+	sensor->mode.fmt = format->format;
+	t4ka3_calc_mode(sensor);
+
+	/* vblank range is height dependent adjust and reset to default */
+	t4ka3_get_vblank_limits(sensor, &min, &max, &def);
+	ret = __v4l2_ctrl_modify_range(sensor->ctrls.vblank, min, max, 1, def);
+	if (ret)
+		goto unlock;
+
+	ret = __v4l2_ctrl_s_ctrl(sensor->ctrls.vblank, def);
+	if (ret)
+		goto unlock;
+
+	def = T4KA3_ACTIVE_WIDTH - sensor->mode.fmt.width;
+	ret = __v4l2_ctrl_modify_range(sensor->ctrls.hblank, def, def, 1, def);
+	if (ret)
+		goto unlock;
+	ret = __v4l2_ctrl_s_ctrl(sensor->ctrls.hblank, def);
+	if (ret)
+		goto unlock;
+
+	/* exposure range depends on vts which may have changed */
+	ret = t4ka3_update_exposure_range(sensor);
+	if (ret)
+		goto unlock;
+
+unlock:
+	mutex_unlock(&sensor->lock);
+	return ret;
+}
+
+/* Horizontal flip the image. */
+static int t4ka3_t_hflip(struct v4l2_subdev *sd, int value)
+{
+	struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+	int ret;
+	u64 val;
+
+	if (sensor->streaming)
+		return -EBUSY;
+
+	val = value ? T4KA3_HFLIP_BIT : 0;
+
+	ret = cci_update_bits(sensor->regmap, T4KA3_REG_IMG_ORIENTATION,
+			      T4KA3_HFLIP_BIT, val, NULL);
+	if (ret)
+		return ret;
+
+	t4ka3_set_bayer_order(sensor, &sensor->mode.fmt);
+	return 0;
+}
+
+/* Vertically flip the image */
+static int t4ka3_t_vflip(struct v4l2_subdev *sd, int value)
+{
+	struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+	int ret;
+	u64 val;
+
+	if (sensor->streaming)
+		return -EBUSY;
+
+	val = value ? T4KA3_VFLIP_BIT : 0;
+
+	ret = cci_update_bits(sensor->regmap, T4KA3_REG_IMG_ORIENTATION,
+			      T4KA3_VFLIP_BIT, val, NULL);
+	if (ret)
+		return ret;
+
+	t4ka3_set_bayer_order(sensor, &sensor->mode.fmt);
+	return 0;
+}
+
+static int t4ka3_test_pattern(struct t4ka3_data *sensor, s32 value)
+{
+	return cci_write(sensor->regmap, T4KA3_REG_TEST_PATTERN_MODE, value, NULL);
+}
+
+static int t4ka3_detect(struct t4ka3_data *sensor, u16 *id)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&sensor->sd);
+	struct i2c_adapter *adapter = client->adapter;
+	u64 high, low;
+	int ret = 0;
+
+	/* i2c check */
+	if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
+		return -ENODEV;
+
+	/* check sensor chip ID	 */
+	cci_read(sensor->regmap, T4KA3_REG_PRODUCT_ID_HIGH, &high, &ret);
+	cci_read(sensor->regmap, T4KA3_REG_PRODUCT_ID_LOW, &low, &ret);
+	if (ret)
+		return ret;
+
+	*id = (((u8) high) << 8) | (u8) low;
+	if (*id != T4KA3_PRODUCT_ID) {
+		dev_err(sensor->dev, "main sensor t4ka3 ID error\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static int
+t4ka3_s_config(struct v4l2_subdev *sd)
+{
+	struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+	u16 sensor_id;
+	int ret;
+
+	ret = pm_runtime_get_sync(sensor->sd.dev);
+	if (ret) {
+		dev_err(sensor->dev, "t4ka3 power-up err");
+		return ret;
+	}
+
+	ret = t4ka3_detect(sensor, &sensor_id);
+	if (ret) {
+		dev_err(sensor->dev, "Failed to detect sensor.\n");
+		goto fail_detect;
+	}
+
+fail_detect:
+	pm_runtime_put(sensor->sd.dev);
+	return ret;
+}
+
+static int t4ka3_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct t4ka3_data *sensor = ctrl_to_t4ka3(ctrl);
+	int ret;
+
+	/* Update exposure range on vblank changes */
+	if (ctrl->id == V4L2_CID_VBLANK) {
+		ret = t4ka3_update_exposure_range(sensor);
+		if (ret)
+			return ret;
+	}
+
+	/* Only apply changes to the controls if the device is powered up */
+	if (!pm_runtime_get_if_in_use(sensor->sd.dev)) {
+		t4ka3_set_bayer_order(sensor, &sensor->mode.fmt);
+		return 0;
+	}
+
+	switch (ctrl->id) {
+	case V4L2_CID_TEST_PATTERN:
+		ret = t4ka3_test_pattern(sensor, ctrl->val);
+		break;
+	case V4L2_CID_VFLIP:
+		ret = t4ka3_t_vflip(&sensor->sd, ctrl->val);
+		break;
+	case V4L2_CID_HFLIP:
+		ret = t4ka3_t_hflip(&sensor->sd, ctrl->val);
+		break;
+	case V4L2_CID_VBLANK:
+		ret = cci_write(sensor->regmap, T4KA3_REG_FRAME_LENGTH_LINES,
+				sensor->mode.fmt.height + ctrl->val, NULL);
+		break;
+	case V4L2_CID_EXPOSURE:
+		ret = cci_write(sensor->regmap, T4KA3_REG_COARSE_INTEGRATION_TIME,
+				ctrl->val, NULL);
+		break;
+	case V4L2_CID_ANALOGUE_GAIN:
+		ret = cci_write(sensor->regmap, T4KA3_REG_GLOBAL_GAIN,
+				ctrl->val, NULL);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	pm_runtime_put(sensor->sd.dev);
+	return ret;
+}
+
+/* Window/crop start + size *after* binning */
+#define T4KA3_REG_WIN_START_X			CCI_REG16(0x0408)
+#define T4KA3_REG_WIN_START_Y			CCI_REG16(0x040a)
+#define T4KA3_REG_WIN_WIDTH			CCI_REG16(0x040c)
+#define T4KA3_REG_WIN_HEIGHT			CCI_REG16(0x040e)
+#define T4KA3_REG_TEST_PATTERN_MODE		CCI_REG8(0x0601)
+/* Unknown register at address 0x0900 */
+#define T4KA3_REG_0900				CCI_REG8(0x0900)
+static int t4ka3_set_mode(struct t4ka3_data *sensor)
+{
+	int ret = 0;
+
+	cci_write(sensor->regmap, T4KA3_REG_HORZ_OUTPUT_SIZE, sensor->mode.fmt.width, &ret);
+	/* Write mode-height - 2 otherwise things don't work, hw-bug ? */
+	cci_write(sensor->regmap, T4KA3_REG_VERT_OUTPUT_SIZE, sensor->mode.fmt.height - 2, &ret);
+	/* Note overwritten by __v4l2_ctrl_handler_setup() based on vblank ctrl */
+	cci_write(sensor->regmap, T4KA3_REG_FRAME_LENGTH_LINES, T4KA3_LINES_PER_FRAME_30FPS, &ret);
+	cci_write(sensor->regmap, T4KA3_REG_PIXELS_PER_LINE, T4KA3_PIXELS_PER_LINE, &ret);
+	/* Always use the full sensor, using window to crop */
+	cci_write(sensor->regmap, T4KA3_REG_HORZ_START, 0, &ret);
+	cci_write(sensor->regmap, T4KA3_REG_VERT_START, 0, &ret);
+	cci_write(sensor->regmap, T4KA3_REG_HORZ_END, T4KA3_NATIVE_WIDTH - 1, &ret);
+	cci_write(sensor->regmap, T4KA3_REG_VERT_END, T4KA3_NATIVE_HEIGHT - 1, &ret);
+	/* Set window */
+	cci_write(sensor->regmap, T4KA3_REG_WIN_START_X, sensor->mode.win_x, &ret);
+	cci_write(sensor->regmap, T4KA3_REG_WIN_START_Y, sensor->mode.win_y, &ret);
+	cci_write(sensor->regmap, T4KA3_REG_WIN_WIDTH, sensor->mode.fmt.width, &ret);
+	cci_write(sensor->regmap, T4KA3_REG_WIN_HEIGHT, sensor->mode.fmt.height, &ret);
+	/* Write 1 to unknown register 0x0900 */
+	cci_write(sensor->regmap, T4KA3_REG_0900, 1, &ret);
+	cci_write(sensor->regmap, T4KA3_REG_BINNING, T4KA3_BINNING_VAL(sensor->mode.binning), &ret);
+
+	return ret;
+}
+
+static int t4ka3_s_stream(struct v4l2_subdev *sd, int enable)
+{
+	struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+	int ret;
+
+	mutex_lock(&sensor->lock);
+
+	if (sensor->streaming == enable) {
+		dev_warn(sensor->dev, "Stream already %s\n", enable ? "started" : "stopped");
+		ret = -EBUSY;
+		goto error_unlock;
+	}
+
+	if (enable) {
+		ret = pm_runtime_get_sync(sensor->sd.dev);
+		if (ret) {
+			dev_err(sensor->dev, "power-up err.\n");
+			goto error_unlock;
+		}
+
+		cci_multi_reg_write(sensor->regmap, t4ka3_init_config,
+				    ARRAY_SIZE(t4ka3_init_config), &ret);
+		/* enable group hold */
+		cci_write(sensor->regmap, T4KA3_REG_PARAM_HOLD, 1, &ret);
+		cci_multi_reg_write(sensor->regmap, t4ka3_pre_mode_set_regs,
+				    ARRAY_SIZE(t4ka3_pre_mode_set_regs), &ret);
+		if (ret)
+			goto error_powerdown;
+
+		ret = t4ka3_set_mode(sensor);
+		if (ret)
+			goto error_powerdown;
+
+		ret = cci_multi_reg_write(sensor->regmap, t4ka3_post_mode_set_regs,
+					  ARRAY_SIZE(t4ka3_post_mode_set_regs), NULL);
+		if (ret)
+			goto error_powerdown;
+
+		/* Restore value of all ctrls */
+		ret = __v4l2_ctrl_handler_setup(&sensor->ctrls.handler);
+		if (ret)
+			goto error_powerdown;
+
+		/* disable group hold */
+		cci_write(sensor->regmap, T4KA3_REG_PARAM_HOLD, 0, &ret);
+		cci_write(sensor->regmap, T4KA3_REG_STREAM, 1, &ret);
+		if (ret)
+			goto error_powerdown;
+
+		sensor->streaming = 1;
+	} else {
+		ret = cci_write(sensor->regmap, T4KA3_REG_STREAM, 0, NULL);
+		if (ret)
+			goto error_powerdown;
+
+		ret = pm_runtime_put(sensor->sd.dev);
+		if (ret)
+			goto error_unlock;
+
+		sensor->streaming = 0;
+	}
+
+	mutex_unlock(&sensor->lock);
+	return ret;
+
+error_powerdown:
+	pm_runtime_put(sensor->sd.dev);
+error_unlock:
+	mutex_unlock(&sensor->lock);
+	return ret;
+}
+
+static int t4ka3_get_selection(struct v4l2_subdev *sd,
+				struct v4l2_subdev_state *state,
+				struct v4l2_subdev_selection *sel)
+{
+	struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+
+	switch (sel->target) {
+	case V4L2_SEL_TGT_CROP:
+		mutex_lock(&sensor->lock);
+		sel->r = *__t4ka3_get_pad_crop(sensor, state, sel->pad,
+						sel->which);
+		mutex_unlock(&sensor->lock);
+		break;
+	case V4L2_SEL_TGT_NATIVE_SIZE:
+	case V4L2_SEL_TGT_CROP_BOUNDS:
+		sel->r.top = 0;
+		sel->r.left = 0;
+		sel->r.width = T4KA3_NATIVE_WIDTH;
+		sel->r.height = T4KA3_NATIVE_HEIGHT;
+		break;
+	case V4L2_SEL_TGT_CROP_DEFAULT:
+		sel->r = t4ka3_default_crop;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int t4ka3_set_selection(struct v4l2_subdev *sd,
+				struct v4l2_subdev_state *state,
+				struct v4l2_subdev_selection *sel)
+{
+	struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+	struct v4l2_mbus_framefmt *format;
+	struct v4l2_rect *crop;
+	struct v4l2_rect rect;
+
+	if (sel->target != V4L2_SEL_TGT_CROP)
+		return -EINVAL;
+
+	/*
+	 * Clamp the boundaries of the crop rectangle to the size of the sensor
+	 * pixel array. Align to multiples of 2 to ensure Bayer pattern isn't
+	 * disrupted.
+	 */
+	rect.left = clamp_val(ALIGN(sel->r.left, 2),
+			      T4KA3_NATIVE_START_LEFT, T4KA3_NATIVE_WIDTH);
+	rect.top = clamp_val(ALIGN(sel->r.top, 2),
+			     T4KA3_NATIVE_START_TOP, T4KA3_NATIVE_HEIGHT);
+	rect.width = clamp_val(ALIGN(sel->r.width, 2),
+			       T4KA3_MIN_CROP_WIDTH, T4KA3_NATIVE_WIDTH);
+	rect.height = clamp_val(ALIGN(sel->r.height, 2),
+				T4KA3_MIN_CROP_HEIGHT, T4KA3_NATIVE_HEIGHT);
+
+	/* Make sure the crop rectangle isn't outside the bounds of the array */
+	rect.width = min_t(unsigned int, rect.width,
+			   T4KA3_NATIVE_WIDTH - rect.left);
+	rect.height = min_t(unsigned int, rect.height,
+			    T4KA3_NATIVE_HEIGHT - rect.top);
+
+	crop = __t4ka3_get_pad_crop(sensor, state, sel->pad, sel->which);
+
+	mutex_lock(&sensor->lock);
+
+	*crop = rect;
+
+	if (rect.width != crop->width || rect.height != crop->height) {
+		/*
+		 * Reset the output image size if the crop rectangle size has
+		 * been modified.
+		 */
+		format = __t4ka3_get_pad_format(sensor, state, sel->pad,
+						sel->which);
+		format->width = rect.width;
+		format->height = rect.height;
+		if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE)
+			t4ka3_calc_mode(sensor);
+	}
+
+	mutex_unlock(&sensor->lock);
+
+	sel->r = rect;
+
+	return 0;
+}
+
+static int
+t4ka3_enum_mbus_code(struct v4l2_subdev *sd,
+		     struct v4l2_subdev_state *sd_state,
+		     struct v4l2_subdev_mbus_code_enum *code)
+{
+	if (code->index)
+		return -EINVAL;
+
+	code->code = MEDIA_BUS_FMT_SGRBG10_1X10;
+	return 0;
+}
+
+static int t4ka3_enum_frame_size(struct v4l2_subdev *sd,
+				 struct v4l2_subdev_state *sd_state,
+				 struct v4l2_subdev_frame_size_enum *fse)
+{
+	struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+	struct v4l2_rect *crop;
+
+	if (fse->index >= T4KA3_FRAME_SIZES)
+		return -EINVAL;
+
+	crop = __t4ka3_get_pad_crop(sensor, sd_state, fse->pad, fse->which);
+	if (!crop)
+		return -EINVAL;
+
+	fse->min_width = crop->width / (fse->index + 1);
+	fse->min_height = crop->height / (fse->index + 1);
+	fse->max_width = fse->min_width;
+	fse->max_height = fse->min_height;
+
+	return 0;
+}
+
+static int
+t4ka3_get_pad_format(struct v4l2_subdev *sd,
+		     struct v4l2_subdev_state *sd_state,
+		     struct v4l2_subdev_format *fmt)
+{
+	struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+	struct v4l2_mbus_framefmt *format =
+		__t4ka3_get_pad_format(sensor, sd_state, fmt->pad, fmt->which);
+
+	fmt->format = *format;
+	return 0;
+}
+
+static int t4ka3_check_hwcfg(struct t4ka3_data *sensor)
+{
+	struct fwnode_handle *fwnode = dev_fwnode(sensor->dev);
+	struct v4l2_fwnode_endpoint bus_cfg = {
+		.bus_type = V4L2_MBUS_CSI2_DPHY,
+	};
+	struct fwnode_handle *endpoint;
+	unsigned int i;
+	int ret;
+
+	/*
+	 * Sometimes the fwnode graph is initialized by the bridge driver.
+	 * Bridge drivers doing this may also add GPIO mappings, wait for this.
+	 */
+	endpoint = fwnode_graph_get_next_endpoint(fwnode, NULL);
+	if (!endpoint)
+		return dev_err_probe(sensor->dev, -EPROBE_DEFER,
+				     "waiting for fwnode graph endpoint\n");
+
+	ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &bus_cfg);
+	fwnode_handle_put(endpoint);
+	if (ret)
+		return ret;
+
+	if (bus_cfg.bus.mipi_csi2.num_data_lanes != 4) {
+		dev_err(sensor->dev, "only a 4-lane CSI2 config is supported");
+		ret = -EINVAL;
+		goto out_free_bus_cfg;
+	}
+
+	if (!bus_cfg.nr_of_link_frequencies) {
+		dev_err(sensor->dev, "no link frequencies defined\n");
+		ret = -EINVAL;
+		goto out_free_bus_cfg;
+	}
+
+	for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++) {
+		if (bus_cfg.link_frequencies[i] == T4KA3_LINK_FREQ)
+			break;
+	}
+
+	if (i == bus_cfg.nr_of_link_frequencies) {
+		dev_err(sensor->dev, "supported link freq %llu not found\n",
+			T4KA3_LINK_FREQ);
+		ret = -EINVAL;
+		goto out_free_bus_cfg;
+	}
+
+out_free_bus_cfg:
+	v4l2_fwnode_endpoint_free(&bus_cfg);
+
+	return ret;
+}
+
+static int t4ka3_init_state(struct v4l2_subdev *sd,
+			     struct v4l2_subdev_state *sd_state)
+{
+	struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+
+	*v4l2_subdev_state_get_crop(sd_state, 0) = t4ka3_default_crop;
+
+	t4ka3_fill_format(sensor, v4l2_subdev_state_get_format(sd_state, 0),
+			  T4KA3_ACTIVE_WIDTH, T4KA3_ACTIVE_HEIGHT);
+	return 0;
+}
+
+static const struct v4l2_ctrl_ops t4ka3_ctrl_ops = {
+	.s_ctrl = t4ka3_s_ctrl,
+};
+
+static const struct v4l2_subdev_video_ops t4ka3_video_ops = {
+	.s_stream = t4ka3_s_stream,
+};
+
+static const struct v4l2_subdev_pad_ops t4ka3_pad_ops = {
+	.enum_mbus_code = t4ka3_enum_mbus_code,
+	.enum_frame_size = t4ka3_enum_frame_size,
+	.get_fmt = t4ka3_get_pad_format,
+	.set_fmt = t4ka3_set_pad_format,
+	.get_selection = t4ka3_get_selection,
+	.set_selection = t4ka3_set_selection,
+};
+
+static const struct v4l2_subdev_ops t4ka3_ops = {
+	.video = &t4ka3_video_ops,
+	.pad = &t4ka3_pad_ops,
+};
+
+static const struct v4l2_subdev_internal_ops t4ka3_internal_ops = {
+	.init_state = t4ka3_init_state,
+};
+
+static void t4ka3_remove(struct i2c_client *client)
+{
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct t4ka3_data *sensor = to_t4ka3_sensor(sd);
+
+	v4l2_async_unregister_subdev(&sensor->sd);
+	media_entity_cleanup(&sensor->sd.entity);
+	v4l2_ctrl_handler_free(&sensor->ctrls.handler);
+	pm_runtime_disable(&client->dev);
+}
+
+static int t4ka3_init_controls(struct t4ka3_data *sensor)
+{
+	const struct v4l2_ctrl_ops *ops = &t4ka3_ctrl_ops;
+	struct t4ka3_ctrls *ctrls = &sensor->ctrls;
+	struct v4l2_ctrl_handler *hdl = &ctrls->handler;
+	int min, max, def;
+	static const char * const test_pattern_menu[] = {
+		"Disabled",
+		"Solid White",
+		"Color Bars",
+		"Gradient",
+		"Random Data",
+	};
+
+	v4l2_ctrl_handler_init(hdl, 4);
+
+	hdl->lock = &sensor->lock;
+
+	ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
+	ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
+
+	ctrls->test_pattern = v4l2_ctrl_new_std_menu_items(hdl, ops,
+					V4L2_CID_TEST_PATTERN,
+					ARRAY_SIZE(test_pattern_menu) - 1,
+					0, 0, test_pattern_menu);
+	ctrls->link_freq = v4l2_ctrl_new_int_menu(hdl, NULL, V4L2_CID_LINK_FREQ,
+						  0, 0, sensor->link_freq);
+
+	t4ka3_get_vblank_limits(sensor, &min, &max, &def);
+	ctrls->vblank = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VBLANK, min, max, 1, def);
+
+	def = T4KA3_PIXELS_PER_LINE - sensor->mode.fmt.width;
+	ctrls->hblank = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HBLANK,
+					  def, def, 1, def);
+
+	max = T4KA3_LINES_PER_FRAME_30FPS - T4KA3_COARSE_INTEGRATION_TIME_MARGIN;
+	ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE,
+					    0, max, 1, max);
+
+	ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_ANALOGUE_GAIN,
+					T4KA3_MIN_GLOBAL_GAIN_SUPPORTED,
+					T4KA3_MAX_GLOBAL_GAIN_SUPPORTED,
+					1, T4KA3_MIN_GLOBAL_GAIN_SUPPORTED);
+
+	if (hdl->error)
+		return hdl->error;
+
+	ctrls->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
+	ctrls->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
+	ctrls->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+	ctrls->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+	sensor->sd.ctrl_handler = hdl;
+	return 0;
+}
+
+static int t4ka3_pm_suspend(struct device *dev)
+{
+	struct t4ka3_data *sensor = dev_get_drvdata(dev);
+
+	gpiod_set_value_cansleep(sensor->powerdown_gpio, 1);
+	gpiod_set_value_cansleep(sensor->reset_gpio, 1);
+
+	return 0;
+}
+
+static int t4ka3_pm_resume(struct device *dev)
+{
+	struct t4ka3_data *sensor = dev_get_drvdata(dev);
+	u16 sensor_id;
+	int ret;
+
+	usleep_range(5000, 6000);
+
+	gpiod_set_value_cansleep(sensor->powerdown_gpio, 0);
+	gpiod_set_value_cansleep(sensor->reset_gpio, 0);
+
+	/* waiting for the sensor after powering up */
+	msleep(20);
+
+	ret = t4ka3_detect(sensor, &sensor_id);
+	if (ret) {
+		dev_err(sensor->dev, "sensor detect failed\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static DEFINE_RUNTIME_DEV_PM_OPS(t4ka3_pm_ops, t4ka3_pm_suspend, t4ka3_pm_resume, NULL);
+
+static int t4ka3_probe(struct i2c_client *client)
+{
+	struct t4ka3_data *sensor;
+	int ret;
+
+	/* allocate sensor device & init sub device */
+	sensor = devm_kzalloc(&client->dev, sizeof(*sensor), GFP_KERNEL);
+	if (!sensor)
+		return -ENOMEM;
+
+	sensor->dev = &client->dev;
+
+	ret = t4ka3_check_hwcfg(sensor);
+	if (ret)
+		return ret;
+
+	mutex_init(&sensor->lock);
+
+	sensor->link_freq[0] = T4KA3_LINK_FREQ;
+	sensor->mode.crop = t4ka3_default_crop;
+	t4ka3_fill_format(sensor, &sensor->mode.fmt, T4KA3_ACTIVE_WIDTH, T4KA3_ACTIVE_HEIGHT);
+	t4ka3_calc_mode(sensor);
+
+	v4l2_i2c_subdev_init(&(sensor->sd), client, &t4ka3_ops);
+	sensor->sd.internal_ops = &t4ka3_internal_ops;
+
+	sensor->powerdown_gpio = devm_gpiod_get(&client->dev, "powerdown",
+						GPIOD_OUT_HIGH);
+	if (IS_ERR(sensor->powerdown_gpio))
+		return dev_err_probe(&client->dev, PTR_ERR(sensor->powerdown_gpio),
+				     "getting powerdown GPIO\n");
+
+	sensor->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
+						     GPIOD_OUT_HIGH);
+	if (IS_ERR(sensor->reset_gpio))
+		return dev_err_probe(&client->dev, PTR_ERR(sensor->reset_gpio),
+				     "getting reset GPIO\n");
+
+	sensor->regmap = devm_cci_regmap_init_i2c(client, 16);
+	if (IS_ERR(sensor->regmap))
+		return PTR_ERR(sensor->regmap);
+
+	pm_runtime_set_suspended(&client->dev);
+	pm_runtime_enable(&client->dev);
+	pm_runtime_set_autosuspend_delay(&client->dev, 1000);
+	pm_runtime_use_autosuspend(&client->dev);
+
+	ret = t4ka3_s_config(&sensor->sd);
+	if (ret)
+		goto err_pm_runtime;
+
+	sensor->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+	sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
+	sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
+
+	ret = t4ka3_init_controls(sensor);
+	if (ret)
+		goto err_controls;
+
+	ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad);
+	if (ret)
+		goto err_controls;
+
+	ret = v4l2_async_register_subdev_sensor(&sensor->sd);
+	if (ret)
+		goto err_media_entity;
+
+	return 0;
+
+err_media_entity:
+	media_entity_cleanup(&sensor->sd.entity);
+err_controls:
+	v4l2_ctrl_handler_free(&sensor->ctrls.handler);
+err_pm_runtime:
+	pm_runtime_disable(&client->dev);
+	return ret;
+}
+
+static struct acpi_device_id t4ka3_acpi_match[] = {
+	{ "XMCC0003" },
+	{}
+};
+MODULE_DEVICE_TABLE(acpi, t4ka3_acpi_match);
+
+static struct i2c_driver t4ka3_driver = {
+	.driver = {
+		.name = "t4ka3",
+		.acpi_match_table = ACPI_PTR(t4ka3_acpi_match),
+		.pm = pm_sleep_ptr(&t4ka3_pm_ops),
+	},
+	.probe = t4ka3_probe,
+	.remove = t4ka3_remove,
+};
+module_i2c_driver(t4ka3_driver)
+
+MODULE_DESCRIPTION("A low-level driver for T4KA3 sensor");
+MODULE_AUTHOR("HARVEY LV <harvey.lv@intel.com>");
+MODULE_LICENSE("GPL");
