2 * Driver for MT9V022 CMOS Image Sensor from Micron
4 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <linux/videodev2.h>
12 #include <linux/slab.h>
13 #include <linux/i2c.h>
14 #include <linux/delay.h>
15 #include <linux/log2.h>
17 #include <media/v4l2-common.h>
18 #include <media/v4l2-chip-ident.h>
19 #include <media/soc_camera.h>
21 #ifdef CONFIG_MT9M001_PCA9536_SWITCH
25 /* mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
26 * The platform has to define i2c_board_info
27 * and call i2c_register_board_info() */
29 static char *sensor_type;
30 module_param(sensor_type, charp, S_IRUGO);
31 MODULE_PARM_DESC(sensor_type, "Sensor type: \"colour\" or \"monochrome\"\n");
33 /* mt9v022 selected register addresses */
34 #define MT9V022_CHIP_VERSION 0x00
35 #define MT9V022_COLUMN_START 0x01
36 #define MT9V022_ROW_START 0x02
37 #define MT9V022_WINDOW_HEIGHT 0x03
38 #define MT9V022_WINDOW_WIDTH 0x04
39 #define MT9V022_HORIZONTAL_BLANKING 0x05
40 #define MT9V022_VERTICAL_BLANKING 0x06
41 #define MT9V022_CHIP_CONTROL 0x07
42 #define MT9V022_SHUTTER_WIDTH1 0x08
43 #define MT9V022_SHUTTER_WIDTH2 0x09
44 #define MT9V022_SHUTTER_WIDTH_CTRL 0x0a
45 #define MT9V022_TOTAL_SHUTTER_WIDTH 0x0b
46 #define MT9V022_RESET 0x0c
47 #define MT9V022_READ_MODE 0x0d
48 #define MT9V022_MONITOR_MODE 0x0e
49 #define MT9V022_PIXEL_OPERATION_MODE 0x0f
50 #define MT9V022_LED_OUT_CONTROL 0x1b
51 #define MT9V022_ADC_MODE_CONTROL 0x1c
52 #define MT9V022_ANALOG_GAIN 0x34
53 #define MT9V022_BLACK_LEVEL_CALIB_CTRL 0x47
54 #define MT9V022_PIXCLK_FV_LV 0x74
55 #define MT9V022_DIGITAL_TEST_PATTERN 0x7f
56 #define MT9V022_AEC_AGC_ENABLE 0xAF
57 #define MT9V022_MAX_TOTAL_SHUTTER_WIDTH 0xBD
59 /* Progressive scan, master, defaults */
60 #define MT9V022_CHIP_CONTROL_DEFAULT 0x188
62 static const struct soc_camera_data_format mt9v022_colour_formats[] = {
63 /* Order important: first natively supported,
64 * second supported with a GPIO extender */
66 .name = "Bayer (sRGB) 10 bit",
68 .fourcc = V4L2_PIX_FMT_SBGGR16,
69 .colorspace = V4L2_COLORSPACE_SRGB,
71 .name = "Bayer (sRGB) 8 bit",
73 .fourcc = V4L2_PIX_FMT_SBGGR8,
74 .colorspace = V4L2_COLORSPACE_SRGB,
78 static const struct soc_camera_data_format mt9v022_monochrome_formats[] = {
79 /* Order important - see above */
81 .name = "Monochrome 10 bit",
83 .fourcc = V4L2_PIX_FMT_Y16,
85 .name = "Monochrome 8 bit",
87 .fourcc = V4L2_PIX_FMT_GREY,
92 struct i2c_client *client;
93 struct soc_camera_device icd;
94 int model; /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */
97 unsigned char datawidth;
100 static int reg_read(struct soc_camera_device *icd, const u8 reg)
102 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
103 struct i2c_client *client = mt9v022->client;
104 s32 data = i2c_smbus_read_word_data(client, reg);
105 return data < 0 ? data : swab16(data);
108 static int reg_write(struct soc_camera_device *icd, const u8 reg,
111 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
112 return i2c_smbus_write_word_data(mt9v022->client, reg, swab16(data));
115 static int reg_set(struct soc_camera_device *icd, const u8 reg,
120 ret = reg_read(icd, reg);
123 return reg_write(icd, reg, ret | data);
126 static int reg_clear(struct soc_camera_device *icd, const u8 reg,
131 ret = reg_read(icd, reg);
134 return reg_write(icd, reg, ret & ~data);
137 static int mt9v022_init(struct soc_camera_device *icd)
139 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
142 /* Almost the default mode: master, parallel, simultaneous, and an
143 * undocumented bit 0x200, which is present in table 7, but not in 8,
144 * plus snapshot mode to disable scan for now */
145 mt9v022->chip_control |= 0x10;
146 ret = reg_write(icd, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
148 reg_write(icd, MT9V022_READ_MODE, 0x300);
153 ret = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x3);
155 ret = reg_write(icd, MT9V022_MAX_TOTAL_SHUTTER_WIDTH, 480);
158 ret = reg_clear(icd, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1);
160 ret = reg_write(icd, MT9V022_DIGITAL_TEST_PATTERN, 0);
162 return ret >= 0 ? 0 : -EIO;
165 static int mt9v022_release(struct soc_camera_device *icd)
171 static int mt9v022_start_capture(struct soc_camera_device *icd)
173 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
174 /* Switch to master "normal" mode */
175 mt9v022->chip_control &= ~0x10;
176 if (reg_write(icd, MT9V022_CHIP_CONTROL,
177 mt9v022->chip_control) < 0)
182 static int mt9v022_stop_capture(struct soc_camera_device *icd)
184 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
185 /* Switch to snapshot mode */
186 mt9v022->chip_control |= 0x10;
187 if (reg_write(icd, MT9V022_CHIP_CONTROL,
188 mt9v022->chip_control) < 0)
193 static int bus_switch_request(struct mt9v022 *mt9v022, struct soc_camera_link *icl)
195 #ifdef CONFIG_MT9V022_PCA9536_SWITCH
197 unsigned int gpio = icl->gpio;
199 if (gpio_is_valid(gpio)) {
200 /* We have a data bus switch. */
201 ret = gpio_request(gpio, "mt9v022");
203 dev_err(&mt9v022->client->dev, "Cannot get GPIO %u\n", gpio);
207 ret = gpio_direction_output(gpio, 0);
209 dev_err(&mt9v022->client->dev,
210 "Cannot set GPIO %u to output\n", gpio);
216 mt9v022->switch_gpio = gpio;
218 mt9v022->switch_gpio = -EINVAL;
223 static void bus_switch_release(struct mt9v022 *mt9v022)
225 #ifdef CONFIG_MT9V022_PCA9536_SWITCH
226 if (gpio_is_valid(mt9v022->switch_gpio))
227 gpio_free(mt9v022->switch_gpio);
231 static int bus_switch_act(struct mt9v022 *mt9v022, int go8bit)
233 #ifdef CONFIG_MT9V022_PCA9536_SWITCH
234 if (!gpio_is_valid(mt9v022->switch_gpio))
237 gpio_set_value_cansleep(mt9v022->switch_gpio, go8bit);
244 static int bus_switch_possible(struct mt9v022 *mt9v022)
246 #ifdef CONFIG_MT9V022_PCA9536_SWITCH
247 return gpio_is_valid(mt9v022->switch_gpio);
253 static int mt9v022_set_bus_param(struct soc_camera_device *icd,
256 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
257 unsigned int width_flag = flags & SOCAM_DATAWIDTH_MASK;
261 /* Only one width bit may be set */
262 if (!is_power_of_2(width_flag))
265 if ((mt9v022->datawidth != 10 && (width_flag == SOCAM_DATAWIDTH_10)) ||
266 (mt9v022->datawidth != 9 && (width_flag == SOCAM_DATAWIDTH_9)) ||
267 (mt9v022->datawidth != 8 && (width_flag == SOCAM_DATAWIDTH_8))) {
268 /* Well, we actually only can do 10 or 8 bits... */
269 if (width_flag == SOCAM_DATAWIDTH_9)
272 ret = bus_switch_act(mt9v022,
273 width_flag == SOCAM_DATAWIDTH_8);
277 mt9v022->datawidth = width_flag == SOCAM_DATAWIDTH_8 ? 8 : 10;
280 if (flags & SOCAM_PCLK_SAMPLE_RISING)
283 if (!(flags & SOCAM_HSYNC_ACTIVE_HIGH))
286 if (!(flags & SOCAM_VSYNC_ACTIVE_HIGH))
289 ret = reg_write(icd, MT9V022_PIXCLK_FV_LV, pixclk);
293 if (!(flags & SOCAM_MASTER))
294 mt9v022->chip_control &= ~0x8;
296 ret = reg_write(icd, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
300 dev_dbg(&icd->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
301 pixclk, mt9v022->chip_control);
306 static unsigned long mt9v022_query_bus_param(struct soc_camera_device *icd)
308 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
309 unsigned int width_flag = SOCAM_DATAWIDTH_10;
311 if (bus_switch_possible(mt9v022))
312 width_flag |= SOCAM_DATAWIDTH_8;
314 return SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING |
315 SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW |
316 SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW |
317 SOCAM_MASTER | SOCAM_SLAVE |
321 static int mt9v022_set_fmt_cap(struct soc_camera_device *icd,
322 __u32 pixfmt, struct v4l2_rect *rect)
324 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
327 /* The caller provides a supported format, as verified per call to
328 * icd->try_fmt_cap(), datawidth is from our supported format list */
330 case V4L2_PIX_FMT_GREY:
331 case V4L2_PIX_FMT_Y16:
332 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATM)
335 case V4L2_PIX_FMT_SBGGR8:
336 case V4L2_PIX_FMT_SBGGR16:
337 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATC)
341 /* No format change, only geometry */
347 /* Like in example app. Contradicts the datasheet though */
348 ret = reg_read(icd, MT9V022_AEC_AGC_ENABLE);
350 if (ret & 1) /* Autoexposure */
351 ret = reg_write(icd, MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
352 rect->height + icd->y_skip_top + 43);
354 ret = reg_write(icd, MT9V022_TOTAL_SHUTTER_WIDTH,
355 rect->height + icd->y_skip_top + 43);
357 /* Setup frame format: defaults apart from width and height */
359 ret = reg_write(icd, MT9V022_COLUMN_START, rect->left);
361 ret = reg_write(icd, MT9V022_ROW_START, rect->top);
363 /* Default 94, Phytec driver says:
364 * "width + horizontal blank >= 660" */
365 ret = reg_write(icd, MT9V022_HORIZONTAL_BLANKING,
366 rect->width > 660 - 43 ? 43 :
369 ret = reg_write(icd, MT9V022_VERTICAL_BLANKING, 45);
371 ret = reg_write(icd, MT9V022_WINDOW_WIDTH, rect->width);
373 ret = reg_write(icd, MT9V022_WINDOW_HEIGHT,
374 rect->height + icd->y_skip_top);
379 dev_dbg(&icd->dev, "Frame %ux%u pixel\n", rect->width, rect->height);
384 static int mt9v022_try_fmt_cap(struct soc_camera_device *icd,
385 struct v4l2_format *f)
387 if (f->fmt.pix.height < 32 + icd->y_skip_top)
388 f->fmt.pix.height = 32 + icd->y_skip_top;
389 if (f->fmt.pix.height > 480 + icd->y_skip_top)
390 f->fmt.pix.height = 480 + icd->y_skip_top;
391 if (f->fmt.pix.width < 48)
392 f->fmt.pix.width = 48;
393 if (f->fmt.pix.width > 752)
394 f->fmt.pix.width = 752;
395 f->fmt.pix.width &= ~0x03; /* ? */
400 static int mt9v022_get_chip_id(struct soc_camera_device *icd,
401 struct v4l2_chip_ident *id)
403 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
405 if (id->match_type != V4L2_CHIP_MATCH_I2C_ADDR)
408 if (id->match_chip != mt9v022->client->addr)
411 id->ident = mt9v022->model;
417 #ifdef CONFIG_VIDEO_ADV_DEBUG
418 static int mt9v022_get_register(struct soc_camera_device *icd,
419 struct v4l2_register *reg)
421 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
423 if (reg->match_type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
426 if (reg->match_chip != mt9v022->client->addr)
429 reg->val = reg_read(icd, reg->reg);
431 if (reg->val > 0xffff)
437 static int mt9v022_set_register(struct soc_camera_device *icd,
438 struct v4l2_register *reg)
440 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
442 if (reg->match_type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
445 if (reg->match_chip != mt9v022->client->addr)
448 if (reg_write(icd, reg->reg, reg->val) < 0)
455 const struct v4l2_queryctrl mt9v022_controls[] = {
457 .id = V4L2_CID_VFLIP,
458 .type = V4L2_CTRL_TYPE_BOOLEAN,
459 .name = "Flip Vertically",
465 .id = V4L2_CID_HFLIP,
466 .type = V4L2_CTRL_TYPE_BOOLEAN,
467 .name = "Flip Horizontally",
474 .type = V4L2_CTRL_TYPE_INTEGER,
475 .name = "Analog Gain",
480 .flags = V4L2_CTRL_FLAG_SLIDER,
482 .id = V4L2_CID_EXPOSURE,
483 .type = V4L2_CTRL_TYPE_INTEGER,
488 .default_value = 255,
489 .flags = V4L2_CTRL_FLAG_SLIDER,
491 .id = V4L2_CID_AUTOGAIN,
492 .type = V4L2_CTRL_TYPE_BOOLEAN,
493 .name = "Automatic Gain",
499 .id = V4L2_CID_EXPOSURE_AUTO,
500 .type = V4L2_CTRL_TYPE_BOOLEAN,
501 .name = "Automatic Exposure",
509 static int mt9v022_video_probe(struct soc_camera_device *);
510 static void mt9v022_video_remove(struct soc_camera_device *);
511 static int mt9v022_get_control(struct soc_camera_device *, struct v4l2_control *);
512 static int mt9v022_set_control(struct soc_camera_device *, struct v4l2_control *);
514 static struct soc_camera_ops mt9v022_ops = {
515 .owner = THIS_MODULE,
516 .probe = mt9v022_video_probe,
517 .remove = mt9v022_video_remove,
518 .init = mt9v022_init,
519 .release = mt9v022_release,
520 .start_capture = mt9v022_start_capture,
521 .stop_capture = mt9v022_stop_capture,
522 .set_fmt_cap = mt9v022_set_fmt_cap,
523 .try_fmt_cap = mt9v022_try_fmt_cap,
524 .set_bus_param = mt9v022_set_bus_param,
525 .query_bus_param = mt9v022_query_bus_param,
526 .controls = mt9v022_controls,
527 .num_controls = ARRAY_SIZE(mt9v022_controls),
528 .get_control = mt9v022_get_control,
529 .set_control = mt9v022_set_control,
530 .get_chip_id = mt9v022_get_chip_id,
531 #ifdef CONFIG_VIDEO_ADV_DEBUG
532 .get_register = mt9v022_get_register,
533 .set_register = mt9v022_set_register,
537 static int mt9v022_get_control(struct soc_camera_device *icd,
538 struct v4l2_control *ctrl)
544 data = reg_read(icd, MT9V022_READ_MODE);
547 ctrl->value = !!(data & 0x10);
550 data = reg_read(icd, MT9V022_READ_MODE);
553 ctrl->value = !!(data & 0x20);
555 case V4L2_CID_EXPOSURE_AUTO:
556 data = reg_read(icd, MT9V022_AEC_AGC_ENABLE);
559 ctrl->value = !!(data & 0x1);
561 case V4L2_CID_AUTOGAIN:
562 data = reg_read(icd, MT9V022_AEC_AGC_ENABLE);
565 ctrl->value = !!(data & 0x2);
571 static int mt9v022_set_control(struct soc_camera_device *icd,
572 struct v4l2_control *ctrl)
575 const struct v4l2_queryctrl *qctrl;
577 qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);
585 data = reg_set(icd, MT9V022_READ_MODE, 0x10);
587 data = reg_clear(icd, MT9V022_READ_MODE, 0x10);
593 data = reg_set(icd, MT9V022_READ_MODE, 0x20);
595 data = reg_clear(icd, MT9V022_READ_MODE, 0x20);
600 /* mt9v022 has minimum == default */
601 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
604 unsigned long range = qctrl->maximum - qctrl->minimum;
605 /* Datasheet says 16 to 64. autogain only works properly
606 * after setting gain to maximum 14. Larger values
607 * produce "white fly" noise effect. On the whole,
608 * manually setting analog gain does no good. */
609 unsigned long gain = ((ctrl->value - qctrl->minimum) *
610 10 + range / 2) / range + 4;
613 /* The user wants to set gain manually, hope, she
614 * knows, what she's doing... Switch AGC off. */
616 if (reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
619 dev_info(&icd->dev, "Setting gain from %d to %lu\n",
620 reg_read(icd, MT9V022_ANALOG_GAIN), gain);
621 if (reg_write(icd, MT9V022_ANALOG_GAIN, gain) < 0)
623 icd->gain = ctrl->value;
626 case V4L2_CID_EXPOSURE:
627 /* mt9v022 has maximum == default */
628 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
631 unsigned long range = qctrl->maximum - qctrl->minimum;
632 unsigned long shutter = ((ctrl->value - qctrl->minimum) *
633 479 + range / 2) / range + 1;
634 /* The user wants to set shutter width manually, hope,
635 * she knows, what she's doing... Switch AEC off. */
637 if (reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x1) < 0)
640 dev_dbg(&icd->dev, "Shutter width from %d to %lu\n",
641 reg_read(icd, MT9V022_TOTAL_SHUTTER_WIDTH),
643 if (reg_write(icd, MT9V022_TOTAL_SHUTTER_WIDTH,
646 icd->exposure = ctrl->value;
649 case V4L2_CID_AUTOGAIN:
651 data = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x2);
653 data = reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x2);
657 case V4L2_CID_EXPOSURE_AUTO:
659 data = reg_set(icd, MT9V022_AEC_AGC_ENABLE, 0x1);
661 data = reg_clear(icd, MT9V022_AEC_AGC_ENABLE, 0x1);
669 /* Interface active, can use i2c. If it fails, it can indeed mean, that
670 * this wasn't our capture interface, so, we wait for the right one */
671 static int mt9v022_video_probe(struct soc_camera_device *icd)
673 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
677 if (!icd->dev.parent ||
678 to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
681 /* Read out the chip version register */
682 data = reg_read(icd, MT9V022_CHIP_VERSION);
684 /* must be 0x1311 or 0x1313 */
685 if (data != 0x1311 && data != 0x1313) {
687 dev_info(&icd->dev, "No MT9V022 detected, ID register 0x%x\n",
693 ret = reg_write(icd, MT9V022_RESET, 1);
696 /* 15 clock cycles */
698 if (reg_read(icd, MT9V022_RESET)) {
699 dev_err(&icd->dev, "Resetting MT9V022 failed!\n");
703 /* Set monochrome or colour sensor type */
704 if (sensor_type && (!strcmp("colour", sensor_type) ||
705 !strcmp("color", sensor_type))) {
706 ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
707 mt9v022->model = V4L2_IDENT_MT9V022IX7ATC;
708 icd->formats = mt9v022_colour_formats;
709 if (mt9v022->client->dev.platform_data)
710 icd->num_formats = ARRAY_SIZE(mt9v022_colour_formats);
712 icd->num_formats = 1;
714 ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 0x11);
715 mt9v022->model = V4L2_IDENT_MT9V022IX7ATM;
716 icd->formats = mt9v022_monochrome_formats;
717 if (mt9v022->client->dev.platform_data)
718 icd->num_formats = ARRAY_SIZE(mt9v022_monochrome_formats);
720 icd->num_formats = 1;
724 ret = soc_camera_video_start(icd);
728 dev_info(&icd->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
729 data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ?
730 "monochrome" : "colour");
739 static void mt9v022_video_remove(struct soc_camera_device *icd)
741 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
743 dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", mt9v022->client->addr,
744 mt9v022->icd.dev.parent, mt9v022->icd.vdev);
745 soc_camera_video_stop(&mt9v022->icd);
748 static int mt9v022_probe(struct i2c_client *client)
750 struct mt9v022 *mt9v022;
751 struct soc_camera_device *icd;
752 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
753 struct soc_camera_link *icl = client->dev.platform_data;
757 dev_err(&client->dev, "MT9V022 driver needs platform data\n");
761 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
762 dev_warn(&adapter->dev,
763 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
767 mt9v022 = kzalloc(sizeof(struct mt9v022), GFP_KERNEL);
771 mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
772 mt9v022->client = client;
773 i2c_set_clientdata(client, mt9v022);
776 icd->ops = &mt9v022_ops;
777 icd->control = &client->dev;
783 icd->width_max = 752;
784 icd->height_min = 32;
785 icd->height_max = 480;
787 icd->iface = icl->bus_id;
788 /* Default datawidth - this is the only width this camera (normally)
789 * supports. It is only with extra logic that it can support
790 * other widths. Therefore it seems to be a sensible default. */
791 mt9v022->datawidth = 10;
793 ret = bus_switch_request(mt9v022, icl);
797 ret = soc_camera_device_register(icd);
804 bus_switch_release(mt9v022);
810 static int mt9v022_remove(struct i2c_client *client)
812 struct mt9v022 *mt9v022 = i2c_get_clientdata(client);
814 soc_camera_device_unregister(&mt9v022->icd);
815 bus_switch_release(mt9v022);
821 static struct i2c_driver mt9v022_i2c_driver = {
825 .probe = mt9v022_probe,
826 .remove = mt9v022_remove,
829 static int __init mt9v022_mod_init(void)
831 return i2c_add_driver(&mt9v022_i2c_driver);
834 static void __exit mt9v022_mod_exit(void)
836 i2c_del_driver(&mt9v022_i2c_driver);
839 module_init(mt9v022_mod_init);
840 module_exit(mt9v022_mod_exit);
842 MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
843 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
844 MODULE_LICENSE("GPL");