media: soc_camera: Move the mt9t031 under soc_camera directory

Move the mt9t031 driver to the soc_camera directory in the media staging
tree.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

1 files changed, 0 insertions, 857 deletions

diff --git a/drivers/staging/media/mt9t031/mt9t031.c b/drivers/staging/media/mt9t031/mt9t031.c
deleted file mode 100644
index 4ff179302b4f..000000000000
--- a/drivers/staging/media/mt9t031/mt9t031.c
+++ /dev/null
@@ -1,857 +0,0 @@
-/*
- * Driver for MT9T031 CMOS Image Sensor from Micron
- *
- * Copyright (C) 2008, Guennadi Liakhovetski, DENX Software Engineering <lg@denx.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/device.h>
-#include <linux/i2c.h>
-#include <linux/log2.h>
-#include <linux/pm.h>
-#include <linux/slab.h>
-#include <linux/v4l2-mediabus.h>
-#include <linux/videodev2.h>
-#include <linux/module.h>
-
-#include <media/soc_camera.h>
-#include <media/v4l2-clk.h>
-#include <media/v4l2-subdev.h>
-#include <media/v4l2-ctrls.h>
-
-/*
- * ATTENTION: this driver still cannot be used outside of the soc-camera
- * framework because of its PM implementation, using the video_device node.
- * If hardware becomes available for testing, alternative PM approaches shall
- * be considered and tested.
- */
-
-/*
- * mt9t031 i2c address 0x5d
- * The platform has to define struct i2c_board_info objects and link to them
- * from struct soc_camera_host_desc
- */
-
-/* mt9t031 selected register addresses */
-#define MT9T031_CHIP_VERSION		0x00
-#define MT9T031_ROW_START		0x01
-#define MT9T031_COLUMN_START		0x02
-#define MT9T031_WINDOW_HEIGHT		0x03
-#define MT9T031_WINDOW_WIDTH		0x04
-#define MT9T031_HORIZONTAL_BLANKING	0x05
-#define MT9T031_VERTICAL_BLANKING	0x06
-#define MT9T031_OUTPUT_CONTROL		0x07
-#define MT9T031_SHUTTER_WIDTH_UPPER	0x08
-#define MT9T031_SHUTTER_WIDTH		0x09
-#define MT9T031_PIXEL_CLOCK_CONTROL	0x0a
-#define MT9T031_FRAME_RESTART		0x0b
-#define MT9T031_SHUTTER_DELAY		0x0c
-#define MT9T031_RESET			0x0d
-#define MT9T031_READ_MODE_1		0x1e
-#define MT9T031_READ_MODE_2		0x20
-#define MT9T031_READ_MODE_3		0x21
-#define MT9T031_ROW_ADDRESS_MODE	0x22
-#define MT9T031_COLUMN_ADDRESS_MODE	0x23
-#define MT9T031_GLOBAL_GAIN		0x35
-#define MT9T031_CHIP_ENABLE		0xF8
-
-#define MT9T031_MAX_HEIGHT		1536
-#define MT9T031_MAX_WIDTH		2048
-#define MT9T031_MIN_HEIGHT		2
-#define MT9T031_MIN_WIDTH		18
-#define MT9T031_HORIZONTAL_BLANK	142
-#define MT9T031_VERTICAL_BLANK		25
-#define MT9T031_COLUMN_SKIP		32
-#define MT9T031_ROW_SKIP		20
-
-struct mt9t031 {
-	struct v4l2_subdev subdev;
-	struct v4l2_ctrl_handler hdl;
-	struct {
-		/* exposure/auto-exposure cluster */
-		struct v4l2_ctrl *autoexposure;
-		struct v4l2_ctrl *exposure;
-	};
-	struct v4l2_rect rect;	/* Sensor window */
-	struct v4l2_clk *clk;
-	u16 xskip;
-	u16 yskip;
-	unsigned int total_h;
-	unsigned short y_skip_top;	/* Lines to skip at the top */
-};
-
-static struct mt9t031 *to_mt9t031(const struct i2c_client *client)
-{
-	return container_of(i2c_get_clientdata(client), struct mt9t031, subdev);
-}
-
-static int reg_read(struct i2c_client *client, const u8 reg)
-{
-	return i2c_smbus_read_word_swapped(client, reg);
-}
-
-static int reg_write(struct i2c_client *client, const u8 reg,
-		     const u16 data)
-{
-	return i2c_smbus_write_word_swapped(client, reg, data);
-}
-
-static int reg_set(struct i2c_client *client, const u8 reg,
-		   const u16 data)
-{
-	int ret;
-
-	ret = reg_read(client, reg);
-	if (ret < 0)
-		return ret;
-	return reg_write(client, reg, ret | data);
-}
-
-static int reg_clear(struct i2c_client *client, const u8 reg,
-		     const u16 data)
-{
-	int ret;
-
-	ret = reg_read(client, reg);
-	if (ret < 0)
-		return ret;
-	return reg_write(client, reg, ret & ~data);
-}
-
-static int set_shutter(struct i2c_client *client, const u32 data)
-{
-	int ret;
-
-	ret = reg_write(client, MT9T031_SHUTTER_WIDTH_UPPER, data >> 16);
-
-	if (ret >= 0)
-		ret = reg_write(client, MT9T031_SHUTTER_WIDTH, data & 0xffff);
-
-	return ret;
-}
-
-static int get_shutter(struct i2c_client *client, u32 *data)
-{
-	int ret;
-
-	ret = reg_read(client, MT9T031_SHUTTER_WIDTH_UPPER);
-	*data = ret << 16;
-
-	if (ret >= 0)
-		ret = reg_read(client, MT9T031_SHUTTER_WIDTH);
-	*data |= ret & 0xffff;
-
-	return ret < 0 ? ret : 0;
-}
-
-static int mt9t031_idle(struct i2c_client *client)
-{
-	int ret;
-
-	/* Disable chip output, synchronous option update */
-	ret = reg_write(client, MT9T031_RESET, 1);
-	if (ret >= 0)
-		ret = reg_write(client, MT9T031_RESET, 0);
-	if (ret >= 0)
-		ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2);
-
-	return ret >= 0 ? 0 : -EIO;
-}
-
-static int mt9t031_s_stream(struct v4l2_subdev *sd, int enable)
-{
-	struct i2c_client *client = v4l2_get_subdevdata(sd);
-	int ret;
-
-	if (enable)
-		/* Switch to master "normal" mode */
-		ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 2);
-	else
-		/* Stop sensor readout */
-		ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2);
-
-	if (ret < 0)
-		return -EIO;
-
-	return 0;
-}
-
-/* target must be _even_ */
-static u16 mt9t031_skip(s32 *source, s32 target, s32 max)
-{
-	unsigned int skip;
-
-	if (*source < target + target / 2) {
-		*source = target;
-		return 1;
-	}
-
-	skip = min(max, *source + target / 2) / target;
-	if (skip > 8)
-		skip = 8;
-	*source = target * skip;
-
-	return skip;
-}
-
-/* rect is the sensor rectangle, the caller guarantees parameter validity */
-static int mt9t031_set_params(struct i2c_client *client,
-			      struct v4l2_rect *rect, u16 xskip, u16 yskip)
-{
-	struct mt9t031 *mt9t031 = to_mt9t031(client);
-	int ret;
-	u16 xbin, ybin;
-	const u16 hblank = MT9T031_HORIZONTAL_BLANK,
-		vblank = MT9T031_VERTICAL_BLANK;
-
-	xbin = min(xskip, (u16)3);
-	ybin = min(yskip, (u16)3);
-
-	/*
-	 * Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper.
-	 * There is always a valid suitably aligned value. The worst case is
-	 * xbin = 3, width = 2048. Then we will start at 36, the last read out
-	 * pixel will be 2083, which is < 2085 - first black pixel.
-	 *
-	 * MT9T031 datasheet imposes window left border alignment, depending on
-	 * the selected xskip. Failing to conform to this requirement produces
-	 * dark horizontal stripes in the image. However, even obeying to this
-	 * requirement doesn't eliminate the stripes in all configurations. They
-	 * appear "locally reproducibly," but can differ between tests under
-	 * different lighting conditions.
-	 */
-	switch (xbin) {
-	case 1:
-		rect->left &= ~1;
-		break;
-	case 2:
-		rect->left &= ~3;
-		break;
-	case 3:
-		rect->left = rect->left > roundup(MT9T031_COLUMN_SKIP, 6) ?
-			(rect->left / 6) * 6 : roundup(MT9T031_COLUMN_SKIP, 6);
-	}
-
-	rect->top &= ~1;
-
-	dev_dbg(&client->dev, "skip %u:%u, rect %ux%u@%u:%u\n",
-		xskip, yskip, rect->width, rect->height, rect->left, rect->top);
-
-	/* Disable register update, reconfigure atomically */
-	ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 1);
-	if (ret < 0)
-		return ret;
-
-	/* Blanking and start values - default... */
-	ret = reg_write(client, MT9T031_HORIZONTAL_BLANKING, hblank);
-	if (ret >= 0)
-		ret = reg_write(client, MT9T031_VERTICAL_BLANKING, vblank);
-
-	if (yskip != mt9t031->yskip || xskip != mt9t031->xskip) {
-		/* Binning, skipping */
-		if (ret >= 0)
-			ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE,
-					((xbin - 1) << 4) | (xskip - 1));
-		if (ret >= 0)
-			ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE,
-					((ybin - 1) << 4) | (yskip - 1));
-	}
-	dev_dbg(&client->dev, "new physical left %u, top %u\n",
-		rect->left, rect->top);
-
-	/*
-	 * The caller provides a supported format, as guaranteed by
-	 * .set_fmt(FORMAT_TRY), soc_camera_s_selection() and soc_camera_cropcap()
-	 */
-	if (ret >= 0)
-		ret = reg_write(client, MT9T031_COLUMN_START, rect->left);
-	if (ret >= 0)
-		ret = reg_write(client, MT9T031_ROW_START, rect->top);
-	if (ret >= 0)
-		ret = reg_write(client, MT9T031_WINDOW_WIDTH, rect->width - 1);
-	if (ret >= 0)
-		ret = reg_write(client, MT9T031_WINDOW_HEIGHT,
-				rect->height + mt9t031->y_skip_top - 1);
-	if (ret >= 0 && v4l2_ctrl_g_ctrl(mt9t031->autoexposure) == V4L2_EXPOSURE_AUTO) {
-		mt9t031->total_h = rect->height + mt9t031->y_skip_top + vblank;
-
-		ret = set_shutter(client, mt9t031->total_h);
-	}
-
-	/* Re-enable register update, commit all changes */
-	if (ret >= 0)
-		ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 1);
-
-	if (ret >= 0) {
-		mt9t031->rect = *rect;
-		mt9t031->xskip = xskip;
-		mt9t031->yskip = yskip;
-	}
-
-	return ret < 0 ? ret : 0;
-}
-
-static int mt9t031_set_selection(struct v4l2_subdev *sd,
-		struct v4l2_subdev_pad_config *cfg,
-		struct v4l2_subdev_selection *sel)
-{
-	struct i2c_client *client = v4l2_get_subdevdata(sd);
-	struct mt9t031 *mt9t031 = to_mt9t031(client);
-	struct v4l2_rect rect = sel->r;
-
-	if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE ||
-	    sel->target != V4L2_SEL_TGT_CROP)
-		return -EINVAL;
-
-	rect.width = ALIGN(rect.width, 2);
-	rect.height = ALIGN(rect.height, 2);
-
-	soc_camera_limit_side(&rect.left, &rect.width,
-		     MT9T031_COLUMN_SKIP, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH);
-
-	soc_camera_limit_side(&rect.top, &rect.height,
-		     MT9T031_ROW_SKIP, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT);
-
-	return mt9t031_set_params(client, &rect, mt9t031->xskip, mt9t031->yskip);
-}
-
-static int mt9t031_get_selection(struct v4l2_subdev *sd,
-		struct v4l2_subdev_pad_config *cfg,
-		struct v4l2_subdev_selection *sel)
-{
-	struct i2c_client *client = v4l2_get_subdevdata(sd);
-	struct mt9t031 *mt9t031 = to_mt9t031(client);
-
-	if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
-		return -EINVAL;
-
-	switch (sel->target) {
-	case V4L2_SEL_TGT_CROP_BOUNDS:
-		sel->r.left = MT9T031_COLUMN_SKIP;
-		sel->r.top = MT9T031_ROW_SKIP;
-		sel->r.width = MT9T031_MAX_WIDTH;
-		sel->r.height = MT9T031_MAX_HEIGHT;
-		return 0;
-	case V4L2_SEL_TGT_CROP:
-		sel->r = mt9t031->rect;
-		return 0;
-	default:
-		return -EINVAL;
-	}
-}
-
-static int mt9t031_get_fmt(struct v4l2_subdev *sd,
-		struct v4l2_subdev_pad_config *cfg,
-		struct v4l2_subdev_format *format)
-{
-	struct v4l2_mbus_framefmt *mf = &format->format;
-	struct i2c_client *client = v4l2_get_subdevdata(sd);
-	struct mt9t031 *mt9t031 = to_mt9t031(client);
-
-	if (format->pad)
-		return -EINVAL;
-
-	mf->width	= mt9t031->rect.width / mt9t031->xskip;
-	mf->height	= mt9t031->rect.height / mt9t031->yskip;
-	mf->code	= MEDIA_BUS_FMT_SBGGR10_1X10;
-	mf->colorspace	= V4L2_COLORSPACE_SRGB;
-	mf->field	= V4L2_FIELD_NONE;
-
-	return 0;
-}
-
-/*
- * If a user window larger than sensor window is requested, we'll increase the
- * sensor window.
- */
-static int mt9t031_set_fmt(struct v4l2_subdev *sd,
-		struct v4l2_subdev_pad_config *cfg,
-		struct v4l2_subdev_format *format)
-{
-	struct v4l2_mbus_framefmt *mf = &format->format;
-	struct i2c_client *client = v4l2_get_subdevdata(sd);
-	struct mt9t031 *mt9t031 = to_mt9t031(client);
-	u16 xskip, yskip;
-	struct v4l2_rect rect = mt9t031->rect;
-
-	if (format->pad)
-		return -EINVAL;
-
-	mf->code	= MEDIA_BUS_FMT_SBGGR10_1X10;
-	mf->colorspace	= V4L2_COLORSPACE_SRGB;
-	v4l_bound_align_image(
-			&mf->width, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH, 1,
-			&mf->height, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT, 1, 0);
-
-	if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
-		cfg->try_fmt = *mf;
-		return 0;
-	}
-
-	/*
-	 * Width and height are within limits.
-	 * S_FMT: use binning and skipping for scaling
-	 */
-	xskip = mt9t031_skip(&rect.width, mf->width, MT9T031_MAX_WIDTH);
-	yskip = mt9t031_skip(&rect.height, mf->height, MT9T031_MAX_HEIGHT);
-
-	mf->code	= MEDIA_BUS_FMT_SBGGR10_1X10;
-	mf->colorspace	= V4L2_COLORSPACE_SRGB;
-
-	/* mt9t031_set_params() doesn't change width and height */
-	return mt9t031_set_params(client, &rect, xskip, yskip);
-}
-
-#ifdef CONFIG_VIDEO_ADV_DEBUG
-static int mt9t031_g_register(struct v4l2_subdev *sd,
-			      struct v4l2_dbg_register *reg)
-{
-	struct i2c_client *client = v4l2_get_subdevdata(sd);
-
-	if (reg->reg > 0xff)
-		return -EINVAL;
-
-	reg->size = 1;
-	reg->val = reg_read(client, reg->reg);
-
-	if (reg->val > 0xffff)
-		return -EIO;
-
-	return 0;
-}
-
-static int mt9t031_s_register(struct v4l2_subdev *sd,
-			      const struct v4l2_dbg_register *reg)
-{
-	struct i2c_client *client = v4l2_get_subdevdata(sd);
-
-	if (reg->reg > 0xff)
-		return -EINVAL;
-
-	if (reg_write(client, reg->reg, reg->val) < 0)
-		return -EIO;
-
-	return 0;
-}
-#endif
-
-static int mt9t031_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
-{
-	struct mt9t031 *mt9t031 = container_of(ctrl->handler,
-					       struct mt9t031, hdl);
-	const u32 shutter_max = MT9T031_MAX_HEIGHT + MT9T031_VERTICAL_BLANK;
-	s32 min, max;
-
-	switch (ctrl->id) {
-	case V4L2_CID_EXPOSURE_AUTO:
-		min = mt9t031->exposure->minimum;
-		max = mt9t031->exposure->maximum;
-		mt9t031->exposure->val =
-			(shutter_max / 2 + (mt9t031->total_h - 1) * (max - min))
-				/ shutter_max + min;
-		break;
-	}
-	return 0;
-}
-
-static int mt9t031_s_ctrl(struct v4l2_ctrl *ctrl)
-{
-	struct mt9t031 *mt9t031 = container_of(ctrl->handler,
-					       struct mt9t031, hdl);
-	struct v4l2_subdev *sd = &mt9t031->subdev;
-	struct i2c_client *client = v4l2_get_subdevdata(sd);
-	struct v4l2_ctrl *exp = mt9t031->exposure;
-	int data;
-
-	switch (ctrl->id) {
-	case V4L2_CID_VFLIP:
-		if (ctrl->val)
-			data = reg_set(client, MT9T031_READ_MODE_2, 0x8000);
-		else
-			data = reg_clear(client, MT9T031_READ_MODE_2, 0x8000);
-		if (data < 0)
-			return -EIO;
-		return 0;
-	case V4L2_CID_HFLIP:
-		if (ctrl->val)
-			data = reg_set(client, MT9T031_READ_MODE_2, 0x4000);
-		else
-			data = reg_clear(client, MT9T031_READ_MODE_2, 0x4000);
-		if (data < 0)
-			return -EIO;
-		return 0;
-	case V4L2_CID_GAIN:
-		/* See Datasheet Table 7, Gain settings. */
-		if (ctrl->val <= ctrl->default_value) {
-			/* Pack it into 0..1 step 0.125, register values 0..8 */
-			unsigned long range = ctrl->default_value - ctrl->minimum;
-			data = ((ctrl->val - (s32)ctrl->minimum) * 8 + range / 2) / range;
-
-			dev_dbg(&client->dev, "Setting gain %d\n", data);
-			data = reg_write(client, MT9T031_GLOBAL_GAIN, data);
-			if (data < 0)
-				return -EIO;
-		} else {
-			/* Pack it into 1.125..128 variable step, register values 9..0x7860 */
-			/* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
-			unsigned long range = ctrl->maximum - ctrl->default_value - 1;
-			/* calculated gain: map 65..127 to 9..1024 step 0.125 */
-			unsigned long gain = ((ctrl->val - (s32)ctrl->default_value - 1) *
-					       1015 + range / 2) / range + 9;
-
-			if (gain <= 32)		/* calculated gain 9..32 -> 9..32 */
-				data = gain;
-			else if (gain <= 64)	/* calculated gain 33..64 -> 0x51..0x60 */
-				data = ((gain - 32) * 16 + 16) / 32 + 80;
-			else
-				/* calculated gain 65..1024 -> (1..120) << 8 + 0x60 */
-				data = (((gain - 64 + 7) * 32) & 0xff00) | 0x60;
-
-			dev_dbg(&client->dev, "Set gain from 0x%x to 0x%x\n",
-				reg_read(client, MT9T031_GLOBAL_GAIN), data);
-			data = reg_write(client, MT9T031_GLOBAL_GAIN, data);
-			if (data < 0)
-				return -EIO;
-		}
-		return 0;
-
-	case V4L2_CID_EXPOSURE_AUTO:
-		if (ctrl->val == V4L2_EXPOSURE_MANUAL) {
-			unsigned int range = exp->maximum - exp->minimum;
-			unsigned int shutter = ((exp->val - (s32)exp->minimum) * 1048 +
-						 range / 2) / range + 1;
-			u32 old;
-
-			get_shutter(client, &old);
-			dev_dbg(&client->dev, "Set shutter from %u to %u\n",
-				old, shutter);
-			if (set_shutter(client, shutter) < 0)
-				return -EIO;
-		} else {
-			const u16 vblank = MT9T031_VERTICAL_BLANK;
-			mt9t031->total_h = mt9t031->rect.height +
-				mt9t031->y_skip_top + vblank;
-
-			if (set_shutter(client, mt9t031->total_h) < 0)
-				return -EIO;
-		}
-		return 0;
-	default:
-		return -EINVAL;
-	}
-	return 0;
-}
-
-/*
- * Power Management:
- * This function does nothing for now but must be present for pm to work
- */
-static int mt9t031_runtime_suspend(struct device *dev)
-{
-	return 0;
-}
-
-/*
- * Power Management:
- * COLUMN_ADDRESS_MODE and ROW_ADDRESS_MODE are not rewritten if unchanged
- * they are however changed at reset if the platform hook is present
- * thus we rewrite them with the values stored by the driver
- */
-static int mt9t031_runtime_resume(struct device *dev)
-{
-	struct video_device *vdev = to_video_device(dev);
-	struct v4l2_subdev *sd = soc_camera_vdev_to_subdev(vdev);
-	struct i2c_client *client = v4l2_get_subdevdata(sd);
-	struct mt9t031 *mt9t031 = to_mt9t031(client);
-
-	int ret;
-	u16 xbin, ybin;
-
-	xbin = min(mt9t031->xskip, (u16)3);
-	ybin = min(mt9t031->yskip, (u16)3);
-
-	ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE,
-		((xbin - 1) << 4) | (mt9t031->xskip - 1));
-	if (ret < 0)
-		return ret;
-
-	ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE,
-		((ybin - 1) << 4) | (mt9t031->yskip - 1));
-	if (ret < 0)
-		return ret;
-
-	return 0;
-}
-
-static const struct dev_pm_ops mt9t031_dev_pm_ops = {
-	.runtime_suspend	= mt9t031_runtime_suspend,
-	.runtime_resume		= mt9t031_runtime_resume,
-};
-
-static const struct device_type mt9t031_dev_type = {
-	.name	= "MT9T031",
-	.pm	= &mt9t031_dev_pm_ops,
-};
-
-static int mt9t031_s_power(struct v4l2_subdev *sd, int on)
-{
-	struct i2c_client *client = v4l2_get_subdevdata(sd);
-	struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
-	struct video_device *vdev = soc_camera_i2c_to_vdev(client);
-	struct mt9t031 *mt9t031 = to_mt9t031(client);
-	int ret;
-
-	if (on) {
-		ret = soc_camera_power_on(&client->dev, ssdd, mt9t031->clk);
-		if (ret < 0)
-			return ret;
-		if (vdev)
-			/* Not needed during probing, when vdev isn't available yet */
-			vdev->dev.type = &mt9t031_dev_type;
-	} else {
-		if (vdev)
-			vdev->dev.type = NULL;
-		soc_camera_power_off(&client->dev, ssdd, mt9t031->clk);
-	}
-
-	return 0;
-}
-
-/*
- * Interface active, can use i2c. If it fails, it can indeed mean, that
- * this wasn't our capture interface, so, we wait for the right one
- */
-static int mt9t031_video_probe(struct i2c_client *client)
-{
-	struct mt9t031 *mt9t031 = to_mt9t031(client);
-	s32 data;
-	int ret;
-
-	ret = mt9t031_s_power(&mt9t031->subdev, 1);
-	if (ret < 0)
-		return ret;
-
-	ret = mt9t031_idle(client);
-	if (ret < 0) {
-		dev_err(&client->dev, "Failed to initialise the camera\n");
-		goto done;
-	}
-
-	/* Read out the chip version register */
-	data = reg_read(client, MT9T031_CHIP_VERSION);
-
-	switch (data) {
-	case 0x1621:
-		break;
-	default:
-		dev_err(&client->dev,
-			"No MT9T031 chip detected, register read %x\n", data);
-		ret = -ENODEV;
-		goto done;
-	}
-
-	dev_info(&client->dev, "Detected a MT9T031 chip ID %x\n", data);
-
-	ret = v4l2_ctrl_handler_setup(&mt9t031->hdl);
-
-done:
-	mt9t031_s_power(&mt9t031->subdev, 0);
-
-	return ret;
-}
-
-static int mt9t031_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
-{
-	struct i2c_client *client = v4l2_get_subdevdata(sd);
-	struct mt9t031 *mt9t031 = to_mt9t031(client);
-
-	*lines = mt9t031->y_skip_top;
-
-	return 0;
-}
-
-static const struct v4l2_ctrl_ops mt9t031_ctrl_ops = {
-	.g_volatile_ctrl = mt9t031_g_volatile_ctrl,
-	.s_ctrl = mt9t031_s_ctrl,
-};
-
-static const struct v4l2_subdev_core_ops mt9t031_subdev_core_ops = {
-	.s_power	= mt9t031_s_power,
-#ifdef CONFIG_VIDEO_ADV_DEBUG
-	.g_register	= mt9t031_g_register,
-	.s_register	= mt9t031_s_register,
-#endif
-};
-
-static int mt9t031_enum_mbus_code(struct v4l2_subdev *sd,
-		struct v4l2_subdev_pad_config *cfg,
-		struct v4l2_subdev_mbus_code_enum *code)
-{
-	if (code->pad || code->index)
-		return -EINVAL;
-
-	code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
-	return 0;
-}
-
-static int mt9t031_g_mbus_config(struct v4l2_subdev *sd,
-				struct v4l2_mbus_config *cfg)
-{
-	struct i2c_client *client = v4l2_get_subdevdata(sd);
-	struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
-
-	cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_PCLK_SAMPLE_RISING |
-		V4L2_MBUS_PCLK_SAMPLE_FALLING | V4L2_MBUS_HSYNC_ACTIVE_HIGH |
-		V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_DATA_ACTIVE_HIGH;
-	cfg->type = V4L2_MBUS_PARALLEL;
-	cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
-
-	return 0;
-}
-
-static int mt9t031_s_mbus_config(struct v4l2_subdev *sd,
-				const struct v4l2_mbus_config *cfg)
-{
-	struct i2c_client *client = v4l2_get_subdevdata(sd);
-	struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
-
-	if (soc_camera_apply_board_flags(ssdd, cfg) &
-	    V4L2_MBUS_PCLK_SAMPLE_FALLING)
-		return reg_clear(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000);
-	else
-		return reg_set(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000);
-}
-
-static const struct v4l2_subdev_video_ops mt9t031_subdev_video_ops = {
-	.s_stream	= mt9t031_s_stream,
-	.g_mbus_config	= mt9t031_g_mbus_config,
-	.s_mbus_config	= mt9t031_s_mbus_config,
-};
-
-static const struct v4l2_subdev_sensor_ops mt9t031_subdev_sensor_ops = {
-	.g_skip_top_lines	= mt9t031_g_skip_top_lines,
-};
-
-static const struct v4l2_subdev_pad_ops mt9t031_subdev_pad_ops = {
-	.enum_mbus_code = mt9t031_enum_mbus_code,
-	.get_selection	= mt9t031_get_selection,
-	.set_selection	= mt9t031_set_selection,
-	.get_fmt	= mt9t031_get_fmt,
-	.set_fmt	= mt9t031_set_fmt,
-};
-
-static const struct v4l2_subdev_ops mt9t031_subdev_ops = {
-	.core	= &mt9t031_subdev_core_ops,
-	.video	= &mt9t031_subdev_video_ops,
-	.sensor	= &mt9t031_subdev_sensor_ops,
-	.pad	= &mt9t031_subdev_pad_ops,
-};
-
-static int mt9t031_probe(struct i2c_client *client,
-			 const struct i2c_device_id *did)
-{
-	struct mt9t031 *mt9t031;
-	struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
-	struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
-	int ret;
-
-	if (!ssdd) {
-		dev_err(&client->dev, "MT9T031 driver needs platform data\n");
-		return -EINVAL;
-	}
-
-	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
-		dev_warn(&adapter->dev,
-			 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
-		return -EIO;
-	}
-
-	mt9t031 = devm_kzalloc(&client->dev, sizeof(struct mt9t031), GFP_KERNEL);
-	if (!mt9t031)
-		return -ENOMEM;
-
-	v4l2_i2c_subdev_init(&mt9t031->subdev, client, &mt9t031_subdev_ops);
-	v4l2_ctrl_handler_init(&mt9t031->hdl, 5);
-	v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
-			V4L2_CID_VFLIP, 0, 1, 1, 0);
-	v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
-			V4L2_CID_HFLIP, 0, 1, 1, 0);
-	v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
-			V4L2_CID_GAIN, 0, 127, 1, 64);
-
-	/*
-	 * Simulated autoexposure. If enabled, we calculate shutter width
-	 * ourselves in the driver based on vertical blanking and frame width
-	 */
-	mt9t031->autoexposure = v4l2_ctrl_new_std_menu(&mt9t031->hdl,
-			&mt9t031_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
-			V4L2_EXPOSURE_AUTO);
-	mt9t031->exposure = v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
-			V4L2_CID_EXPOSURE, 1, 255, 1, 255);
-
-	mt9t031->subdev.ctrl_handler = &mt9t031->hdl;
-	if (mt9t031->hdl.error)
-		return mt9t031->hdl.error;
-
-	v4l2_ctrl_auto_cluster(2, &mt9t031->autoexposure,
-				V4L2_EXPOSURE_MANUAL, true);
-
-	mt9t031->y_skip_top	= 0;
-	mt9t031->rect.left	= MT9T031_COLUMN_SKIP;
-	mt9t031->rect.top	= MT9T031_ROW_SKIP;
-	mt9t031->rect.width	= MT9T031_MAX_WIDTH;
-	mt9t031->rect.height	= MT9T031_MAX_HEIGHT;
-
-	mt9t031->xskip = 1;
-	mt9t031->yskip = 1;
-
-	mt9t031->clk = v4l2_clk_get(&client->dev, "mclk");
-	if (IS_ERR(mt9t031->clk)) {
-		ret = PTR_ERR(mt9t031->clk);
-		goto eclkget;
-	}
-
-	ret = mt9t031_video_probe(client);
-	if (ret) {
-		v4l2_clk_put(mt9t031->clk);
-eclkget:
-		v4l2_ctrl_handler_free(&mt9t031->hdl);
-	}
-
-	return ret;
-}
-
-static int mt9t031_remove(struct i2c_client *client)
-{
-	struct mt9t031 *mt9t031 = to_mt9t031(client);
-
-	v4l2_clk_put(mt9t031->clk);
-	v4l2_device_unregister_subdev(&mt9t031->subdev);
-	v4l2_ctrl_handler_free(&mt9t031->hdl);
-
-	return 0;
-}
-
-static const struct i2c_device_id mt9t031_id[] = {
-	{ "mt9t031", 0 },
-	{ }
-};
-MODULE_DEVICE_TABLE(i2c, mt9t031_id);
-
-static struct i2c_driver mt9t031_i2c_driver = {
-	.driver = {
-		.name = "mt9t031",
-	},
-	.probe		= mt9t031_probe,
-	.remove		= mt9t031_remove,
-	.id_table	= mt9t031_id,
-};
-
-module_i2c_driver(mt9t031_i2c_driver);
-
-MODULE_DESCRIPTION("Micron MT9T031 Camera driver");
-MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>");
-MODULE_LICENSE("GPL v2");