1 // SPDX-License-Identifier: GPL-2.0
3 * video-i2c.c - Support for I2C transport video devices
5 * Copyright (C) 2018 Matt Ranostay <matt.ranostay@konsulko.com>
8 * - Panasonic AMG88xx Grid-Eye Sensors
9 * - Melexis MLX90640 Thermal Cameras
12 #include <linux/bits.h>
13 #include <linux/delay.h>
14 #include <linux/freezer.h>
15 #include <linux/hwmon.h>
16 #include <linux/kthread.h>
17 #include <linux/i2c.h>
18 #include <linux/list.h>
19 #include <linux/mod_devicetable.h>
20 #include <linux/module.h>
21 #include <linux/mutex.h>
22 #include <linux/pm_runtime.h>
23 #include <linux/nvmem-provider.h>
24 #include <linux/regmap.h>
25 #include <linux/sched.h>
26 #include <linux/slab.h>
27 #include <linux/videodev2.h>
28 #include <media/v4l2-common.h>
29 #include <media/v4l2-device.h>
30 #include <media/v4l2-event.h>
31 #include <media/v4l2-fh.h>
32 #include <media/v4l2-ioctl.h>
33 #include <media/videobuf2-v4l2.h>
34 #include <media/videobuf2-vmalloc.h>
36 #define VIDEO_I2C_DRIVER "video-i2c"
38 /* Power control register */
39 #define AMG88XX_REG_PCTL 0x00
40 #define AMG88XX_PCTL_NORMAL 0x00
41 #define AMG88XX_PCTL_SLEEP 0x10
44 #define AMG88XX_REG_RST 0x01
45 #define AMG88XX_RST_FLAG 0x30
46 #define AMG88XX_RST_INIT 0x3f
48 /* Frame rate register */
49 #define AMG88XX_REG_FPSC 0x02
50 #define AMG88XX_FPSC_1FPS BIT(0)
52 /* Thermistor register */
53 #define AMG88XX_REG_TTHL 0x0e
55 /* Temperature register */
56 #define AMG88XX_REG_T01L 0x80
59 #define MLX90640_RAM_START_ADDR 0x0400
62 #define MLX90640_EEPROM_START_ADDR 0x2400
64 /* Control register */
65 #define MLX90640_REG_CTL1 0x800d
66 #define MLX90640_REG_CTL1_MASK GENMASK(9, 7)
67 #define MLX90640_REG_CTL1_MASK_SHIFT 7
69 struct video_i2c_chip;
71 struct video_i2c_buffer {
72 struct vb2_v4l2_buffer vb;
73 struct list_head list;
76 struct video_i2c_data {
77 struct regmap *regmap;
78 const struct video_i2c_chip *chip;
81 unsigned int sequence;
82 struct mutex queue_lock;
84 struct v4l2_device v4l2_dev;
85 struct video_device vdev;
86 struct vb2_queue vb_vidq;
88 struct task_struct *kthread_vid_cap;
89 struct list_head vid_cap_active;
91 struct v4l2_fract frame_interval;
94 static const struct v4l2_fmtdesc amg88xx_format = {
95 .pixelformat = V4L2_PIX_FMT_Y12,
98 static const struct v4l2_frmsize_discrete amg88xx_size = {
103 static const struct v4l2_fmtdesc mlx90640_format = {
104 .pixelformat = V4L2_PIX_FMT_Y16_BE,
107 static const struct v4l2_frmsize_discrete mlx90640_size = {
109 .height = 26, /* 24 lines of pixel data + 2 lines of processing data */
112 static const struct regmap_config amg88xx_regmap_config = {
118 static const struct regmap_config mlx90640_regmap_config = {
123 struct video_i2c_chip {
124 /* video dimensions */
125 const struct v4l2_fmtdesc *format;
126 const struct v4l2_frmsize_discrete *size;
128 /* available frame intervals */
129 const struct v4l2_fract *frame_intervals;
130 unsigned int num_frame_intervals;
132 /* pixel buffer size */
133 unsigned int buffer_size;
135 /* pixel size in bits */
138 const struct regmap_config *regmap_config;
139 struct nvmem_config *nvmem_config;
142 int (*setup)(struct video_i2c_data *data);
145 int (*xfer)(struct video_i2c_data *data, char *buf);
147 /* power control function */
148 int (*set_power)(struct video_i2c_data *data, bool on);
150 /* hwmon init function */
151 int (*hwmon_init)(struct video_i2c_data *data);
154 static int mlx90640_nvram_read(void *priv, unsigned int offset, void *val,
157 struct video_i2c_data *data = priv;
159 return regmap_bulk_read(data->regmap, MLX90640_EEPROM_START_ADDR + offset, val, bytes);
162 static struct nvmem_config mlx90640_nvram_config = {
163 .name = "mlx90640_nvram",
167 .reg_read = mlx90640_nvram_read,
170 static int amg88xx_xfer(struct video_i2c_data *data, char *buf)
172 return regmap_bulk_read(data->regmap, AMG88XX_REG_T01L, buf,
173 data->chip->buffer_size);
176 static int mlx90640_xfer(struct video_i2c_data *data, char *buf)
178 return regmap_bulk_read(data->regmap, MLX90640_RAM_START_ADDR, buf,
179 data->chip->buffer_size);
182 static int amg88xx_setup(struct video_i2c_data *data)
184 unsigned int mask = AMG88XX_FPSC_1FPS;
187 if (data->frame_interval.numerator == data->frame_interval.denominator)
192 return regmap_update_bits(data->regmap, AMG88XX_REG_FPSC, mask, val);
195 static int mlx90640_setup(struct video_i2c_data *data)
199 for (n = 0; n < data->chip->num_frame_intervals - 1; n++) {
200 if (V4L2_FRACT_COMPARE(data->frame_interval, ==,
201 data->chip->frame_intervals[n]))
205 idx = data->chip->num_frame_intervals - n - 1;
207 return regmap_update_bits(data->regmap, MLX90640_REG_CTL1,
208 MLX90640_REG_CTL1_MASK,
209 idx << MLX90640_REG_CTL1_MASK_SHIFT);
212 static int amg88xx_set_power_on(struct video_i2c_data *data)
216 ret = regmap_write(data->regmap, AMG88XX_REG_PCTL, AMG88XX_PCTL_NORMAL);
222 ret = regmap_write(data->regmap, AMG88XX_REG_RST, AMG88XX_RST_INIT);
226 usleep_range(2000, 3000);
228 ret = regmap_write(data->regmap, AMG88XX_REG_RST, AMG88XX_RST_FLAG);
233 * Wait two frames before reading thermistor and temperature registers
240 static int amg88xx_set_power_off(struct video_i2c_data *data)
244 ret = regmap_write(data->regmap, AMG88XX_REG_PCTL, AMG88XX_PCTL_SLEEP);
248 * Wait for a while to avoid resuming normal mode immediately after
249 * entering sleep mode, otherwise the device occasionally goes wrong
250 * (thermistor and temperature registers are not updated at all)
257 static int amg88xx_set_power(struct video_i2c_data *data, bool on)
260 return amg88xx_set_power_on(data);
262 return amg88xx_set_power_off(data);
265 #if IS_REACHABLE(CONFIG_HWMON)
267 static const u32 amg88xx_temp_config[] = {
272 static const struct hwmon_channel_info amg88xx_temp = {
274 .config = amg88xx_temp_config,
277 static const struct hwmon_channel_info * const amg88xx_info[] = {
282 static umode_t amg88xx_is_visible(const void *drvdata,
283 enum hwmon_sensor_types type,
284 u32 attr, int channel)
289 static int amg88xx_read(struct device *dev, enum hwmon_sensor_types type,
290 u32 attr, int channel, long *val)
292 struct video_i2c_data *data = dev_get_drvdata(dev);
296 tmp = pm_runtime_resume_and_get(regmap_get_device(data->regmap));
300 tmp = regmap_bulk_read(data->regmap, AMG88XX_REG_TTHL, &buf, 2);
301 pm_runtime_mark_last_busy(regmap_get_device(data->regmap));
302 pm_runtime_put_autosuspend(regmap_get_device(data->regmap));
306 tmp = le16_to_cpu(buf);
309 * Check for sign bit, this isn't a two's complement value but an
310 * absolute temperature that needs to be inverted in the case of being
314 tmp = -(tmp & 0x7ff);
316 *val = (tmp * 625) / 10;
321 static const struct hwmon_ops amg88xx_hwmon_ops = {
322 .is_visible = amg88xx_is_visible,
323 .read = amg88xx_read,
326 static const struct hwmon_chip_info amg88xx_chip_info = {
327 .ops = &amg88xx_hwmon_ops,
328 .info = amg88xx_info,
331 static int amg88xx_hwmon_init(struct video_i2c_data *data)
333 struct device *dev = regmap_get_device(data->regmap);
334 void *hwmon = devm_hwmon_device_register_with_info(dev, "amg88xx", data,
335 &amg88xx_chip_info, NULL);
337 return PTR_ERR_OR_ZERO(hwmon);
340 #define amg88xx_hwmon_init NULL
348 static const struct v4l2_fract amg88xx_frame_intervals[] = {
353 static const struct v4l2_fract mlx90640_frame_intervals[] = {
364 static const struct video_i2c_chip video_i2c_chip[] = {
366 .size = &amg88xx_size,
367 .format = &amg88xx_format,
368 .frame_intervals = amg88xx_frame_intervals,
369 .num_frame_intervals = ARRAY_SIZE(amg88xx_frame_intervals),
372 .regmap_config = &amg88xx_regmap_config,
373 .setup = &amg88xx_setup,
374 .xfer = &amg88xx_xfer,
375 .set_power = amg88xx_set_power,
376 .hwmon_init = amg88xx_hwmon_init,
379 .size = &mlx90640_size,
380 .format = &mlx90640_format,
381 .frame_intervals = mlx90640_frame_intervals,
382 .num_frame_intervals = ARRAY_SIZE(mlx90640_frame_intervals),
385 .regmap_config = &mlx90640_regmap_config,
386 .nvmem_config = &mlx90640_nvram_config,
387 .setup = mlx90640_setup,
388 .xfer = mlx90640_xfer,
392 static const struct v4l2_file_operations video_i2c_fops = {
393 .owner = THIS_MODULE,
394 .open = v4l2_fh_open,
395 .release = vb2_fop_release,
396 .poll = vb2_fop_poll,
397 .read = vb2_fop_read,
398 .mmap = vb2_fop_mmap,
399 .unlocked_ioctl = video_ioctl2,
402 static int queue_setup(struct vb2_queue *vq,
403 unsigned int *nbuffers, unsigned int *nplanes,
404 unsigned int sizes[], struct device *alloc_devs[])
406 struct video_i2c_data *data = vb2_get_drv_priv(vq);
407 unsigned int size = data->chip->buffer_size;
408 unsigned int q_num_bufs = vb2_get_num_buffers(vq);
410 if (q_num_bufs + *nbuffers < 2)
411 *nbuffers = 2 - q_num_bufs;
414 return sizes[0] < size ? -EINVAL : 0;
422 static int buffer_prepare(struct vb2_buffer *vb)
424 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
425 struct video_i2c_data *data = vb2_get_drv_priv(vb->vb2_queue);
426 unsigned int size = data->chip->buffer_size;
428 if (vb2_plane_size(vb, 0) < size)
431 vbuf->field = V4L2_FIELD_NONE;
432 vb2_set_plane_payload(vb, 0, size);
437 static void buffer_queue(struct vb2_buffer *vb)
439 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
440 struct video_i2c_data *data = vb2_get_drv_priv(vb->vb2_queue);
441 struct video_i2c_buffer *buf =
442 container_of(vbuf, struct video_i2c_buffer, vb);
444 spin_lock(&data->slock);
445 list_add_tail(&buf->list, &data->vid_cap_active);
446 spin_unlock(&data->slock);
449 static int video_i2c_thread_vid_cap(void *priv)
451 struct video_i2c_data *data = priv;
452 u32 delay = mult_frac(1000000UL, data->frame_interval.numerator,
453 data->frame_interval.denominator);
454 s64 end_us = ktime_to_us(ktime_get());
459 struct video_i2c_buffer *vid_cap_buf = NULL;
465 spin_lock(&data->slock);
467 if (!list_empty(&data->vid_cap_active)) {
468 vid_cap_buf = list_last_entry(&data->vid_cap_active,
469 struct video_i2c_buffer, list);
470 list_del(&vid_cap_buf->list);
473 spin_unlock(&data->slock);
476 struct vb2_buffer *vb2_buf = &vid_cap_buf->vb.vb2_buf;
477 void *vbuf = vb2_plane_vaddr(vb2_buf, 0);
480 ret = data->chip->xfer(data, vbuf);
481 vb2_buf->timestamp = ktime_get_ns();
482 vid_cap_buf->vb.sequence = data->sequence++;
483 vb2_buffer_done(vb2_buf, ret ?
484 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
488 current_us = ktime_to_us(ktime_get());
489 if (current_us < end_us) {
490 schedule_delay = end_us - current_us;
491 usleep_range(schedule_delay * 3 / 4, schedule_delay);
495 } while (!kthread_should_stop());
500 static void video_i2c_del_list(struct vb2_queue *vq, enum vb2_buffer_state state)
502 struct video_i2c_data *data = vb2_get_drv_priv(vq);
503 struct video_i2c_buffer *buf, *tmp;
505 spin_lock(&data->slock);
507 list_for_each_entry_safe(buf, tmp, &data->vid_cap_active, list) {
508 list_del(&buf->list);
509 vb2_buffer_done(&buf->vb.vb2_buf, state);
512 spin_unlock(&data->slock);
515 static int start_streaming(struct vb2_queue *vq, unsigned int count)
517 struct video_i2c_data *data = vb2_get_drv_priv(vq);
518 struct device *dev = regmap_get_device(data->regmap);
521 if (data->kthread_vid_cap)
524 ret = pm_runtime_resume_and_get(dev);
528 ret = data->chip->setup(data);
533 data->kthread_vid_cap = kthread_run(video_i2c_thread_vid_cap, data,
534 "%s-vid-cap", data->v4l2_dev.name);
535 ret = PTR_ERR_OR_ZERO(data->kthread_vid_cap);
540 pm_runtime_mark_last_busy(dev);
541 pm_runtime_put_autosuspend(dev);
543 video_i2c_del_list(vq, VB2_BUF_STATE_QUEUED);
548 static void stop_streaming(struct vb2_queue *vq)
550 struct video_i2c_data *data = vb2_get_drv_priv(vq);
552 if (data->kthread_vid_cap == NULL)
555 kthread_stop(data->kthread_vid_cap);
556 data->kthread_vid_cap = NULL;
557 pm_runtime_mark_last_busy(regmap_get_device(data->regmap));
558 pm_runtime_put_autosuspend(regmap_get_device(data->regmap));
560 video_i2c_del_list(vq, VB2_BUF_STATE_ERROR);
563 static const struct vb2_ops video_i2c_video_qops = {
564 .queue_setup = queue_setup,
565 .buf_prepare = buffer_prepare,
566 .buf_queue = buffer_queue,
567 .start_streaming = start_streaming,
568 .stop_streaming = stop_streaming,
569 .wait_prepare = vb2_ops_wait_prepare,
570 .wait_finish = vb2_ops_wait_finish,
573 static int video_i2c_querycap(struct file *file, void *priv,
574 struct v4l2_capability *vcap)
576 struct video_i2c_data *data = video_drvdata(file);
577 struct device *dev = regmap_get_device(data->regmap);
578 struct i2c_client *client = to_i2c_client(dev);
580 strscpy(vcap->driver, data->v4l2_dev.name, sizeof(vcap->driver));
581 strscpy(vcap->card, data->vdev.name, sizeof(vcap->card));
583 sprintf(vcap->bus_info, "I2C:%d-%d", client->adapter->nr, client->addr);
588 static int video_i2c_g_input(struct file *file, void *fh, unsigned int *inp)
595 static int video_i2c_s_input(struct file *file, void *fh, unsigned int inp)
597 return (inp > 0) ? -EINVAL : 0;
600 static int video_i2c_enum_input(struct file *file, void *fh,
601 struct v4l2_input *vin)
606 strscpy(vin->name, "Camera", sizeof(vin->name));
608 vin->type = V4L2_INPUT_TYPE_CAMERA;
613 static int video_i2c_enum_fmt_vid_cap(struct file *file, void *fh,
614 struct v4l2_fmtdesc *fmt)
616 struct video_i2c_data *data = video_drvdata(file);
617 enum v4l2_buf_type type = fmt->type;
622 *fmt = *data->chip->format;
628 static int video_i2c_enum_framesizes(struct file *file, void *fh,
629 struct v4l2_frmsizeenum *fsize)
631 const struct video_i2c_data *data = video_drvdata(file);
632 const struct v4l2_frmsize_discrete *size = data->chip->size;
634 /* currently only one frame size is allowed */
635 if (fsize->index > 0)
638 if (fsize->pixel_format != data->chip->format->pixelformat)
641 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
642 fsize->discrete.width = size->width;
643 fsize->discrete.height = size->height;
648 static int video_i2c_enum_frameintervals(struct file *file, void *priv,
649 struct v4l2_frmivalenum *fe)
651 const struct video_i2c_data *data = video_drvdata(file);
652 const struct v4l2_frmsize_discrete *size = data->chip->size;
654 if (fe->index >= data->chip->num_frame_intervals)
657 if (fe->width != size->width || fe->height != size->height)
660 fe->type = V4L2_FRMIVAL_TYPE_DISCRETE;
661 fe->discrete = data->chip->frame_intervals[fe->index];
666 static int video_i2c_try_fmt_vid_cap(struct file *file, void *fh,
667 struct v4l2_format *fmt)
669 const struct video_i2c_data *data = video_drvdata(file);
670 const struct v4l2_frmsize_discrete *size = data->chip->size;
671 struct v4l2_pix_format *pix = &fmt->fmt.pix;
672 unsigned int bpp = data->chip->bpp / 8;
674 pix->width = size->width;
675 pix->height = size->height;
676 pix->pixelformat = data->chip->format->pixelformat;
677 pix->field = V4L2_FIELD_NONE;
678 pix->bytesperline = pix->width * bpp;
679 pix->sizeimage = pix->bytesperline * pix->height;
680 pix->colorspace = V4L2_COLORSPACE_RAW;
685 static int video_i2c_s_fmt_vid_cap(struct file *file, void *fh,
686 struct v4l2_format *fmt)
688 struct video_i2c_data *data = video_drvdata(file);
690 if (vb2_is_busy(&data->vb_vidq))
693 return video_i2c_try_fmt_vid_cap(file, fh, fmt);
696 static int video_i2c_g_parm(struct file *filp, void *priv,
697 struct v4l2_streamparm *parm)
699 struct video_i2c_data *data = video_drvdata(filp);
701 if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
704 parm->parm.capture.readbuffers = 1;
705 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
706 parm->parm.capture.timeperframe = data->frame_interval;
711 static int video_i2c_s_parm(struct file *filp, void *priv,
712 struct v4l2_streamparm *parm)
714 struct video_i2c_data *data = video_drvdata(filp);
717 for (i = 0; i < data->chip->num_frame_intervals - 1; i++) {
718 if (V4L2_FRACT_COMPARE(parm->parm.capture.timeperframe, <=,
719 data->chip->frame_intervals[i]))
722 data->frame_interval = data->chip->frame_intervals[i];
724 return video_i2c_g_parm(filp, priv, parm);
727 static const struct v4l2_ioctl_ops video_i2c_ioctl_ops = {
728 .vidioc_querycap = video_i2c_querycap,
729 .vidioc_g_input = video_i2c_g_input,
730 .vidioc_s_input = video_i2c_s_input,
731 .vidioc_enum_input = video_i2c_enum_input,
732 .vidioc_enum_fmt_vid_cap = video_i2c_enum_fmt_vid_cap,
733 .vidioc_enum_framesizes = video_i2c_enum_framesizes,
734 .vidioc_enum_frameintervals = video_i2c_enum_frameintervals,
735 .vidioc_g_fmt_vid_cap = video_i2c_try_fmt_vid_cap,
736 .vidioc_s_fmt_vid_cap = video_i2c_s_fmt_vid_cap,
737 .vidioc_g_parm = video_i2c_g_parm,
738 .vidioc_s_parm = video_i2c_s_parm,
739 .vidioc_try_fmt_vid_cap = video_i2c_try_fmt_vid_cap,
740 .vidioc_reqbufs = vb2_ioctl_reqbufs,
741 .vidioc_create_bufs = vb2_ioctl_create_bufs,
742 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
743 .vidioc_querybuf = vb2_ioctl_querybuf,
744 .vidioc_qbuf = vb2_ioctl_qbuf,
745 .vidioc_dqbuf = vb2_ioctl_dqbuf,
746 .vidioc_streamon = vb2_ioctl_streamon,
747 .vidioc_streamoff = vb2_ioctl_streamoff,
750 static void video_i2c_release(struct video_device *vdev)
752 struct video_i2c_data *data = video_get_drvdata(vdev);
754 v4l2_device_unregister(&data->v4l2_dev);
755 mutex_destroy(&data->lock);
756 mutex_destroy(&data->queue_lock);
757 regmap_exit(data->regmap);
761 static int video_i2c_probe(struct i2c_client *client)
763 struct video_i2c_data *data;
764 struct v4l2_device *v4l2_dev;
765 struct vb2_queue *queue;
768 data = kzalloc(sizeof(*data), GFP_KERNEL);
772 data->chip = i2c_get_match_data(client);
774 goto error_free_device;
776 data->regmap = regmap_init_i2c(client, data->chip->regmap_config);
777 if (IS_ERR(data->regmap)) {
778 ret = PTR_ERR(data->regmap);
779 goto error_free_device;
782 v4l2_dev = &data->v4l2_dev;
783 strscpy(v4l2_dev->name, VIDEO_I2C_DRIVER, sizeof(v4l2_dev->name));
785 ret = v4l2_device_register(&client->dev, v4l2_dev);
787 goto error_regmap_exit;
789 mutex_init(&data->lock);
790 mutex_init(&data->queue_lock);
792 queue = &data->vb_vidq;
793 queue->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
794 queue->io_modes = VB2_DMABUF | VB2_MMAP | VB2_USERPTR | VB2_READ;
795 queue->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
796 queue->drv_priv = data;
797 queue->buf_struct_size = sizeof(struct video_i2c_buffer);
798 queue->min_queued_buffers = 1;
799 queue->ops = &video_i2c_video_qops;
800 queue->mem_ops = &vb2_vmalloc_memops;
802 ret = vb2_queue_init(queue);
804 goto error_unregister_device;
806 data->vdev.queue = queue;
807 data->vdev.queue->lock = &data->queue_lock;
809 snprintf(data->vdev.name, sizeof(data->vdev.name),
810 "I2C %d-%d Transport Video",
811 client->adapter->nr, client->addr);
813 data->vdev.v4l2_dev = v4l2_dev;
814 data->vdev.fops = &video_i2c_fops;
815 data->vdev.lock = &data->lock;
816 data->vdev.ioctl_ops = &video_i2c_ioctl_ops;
817 data->vdev.release = video_i2c_release;
818 data->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE |
819 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
821 spin_lock_init(&data->slock);
822 INIT_LIST_HEAD(&data->vid_cap_active);
824 data->frame_interval = data->chip->frame_intervals[0];
826 video_set_drvdata(&data->vdev, data);
827 i2c_set_clientdata(client, data);
829 if (data->chip->set_power) {
830 ret = data->chip->set_power(data, true);
832 goto error_unregister_device;
835 pm_runtime_get_noresume(&client->dev);
836 pm_runtime_set_active(&client->dev);
837 pm_runtime_enable(&client->dev);
838 pm_runtime_set_autosuspend_delay(&client->dev, 2000);
839 pm_runtime_use_autosuspend(&client->dev);
841 if (data->chip->hwmon_init) {
842 ret = data->chip->hwmon_init(data);
844 dev_warn(&client->dev,
845 "failed to register hwmon device\n");
849 if (data->chip->nvmem_config) {
850 struct nvmem_config *config = data->chip->nvmem_config;
851 struct nvmem_device *device;
854 config->dev = &client->dev;
856 device = devm_nvmem_register(&client->dev, config);
858 if (IS_ERR(device)) {
859 dev_warn(&client->dev,
860 "failed to register nvmem device\n");
864 ret = video_register_device(&data->vdev, VFL_TYPE_VIDEO, -1);
866 goto error_pm_disable;
868 pm_runtime_mark_last_busy(&client->dev);
869 pm_runtime_put_autosuspend(&client->dev);
874 pm_runtime_disable(&client->dev);
875 pm_runtime_set_suspended(&client->dev);
876 pm_runtime_put_noidle(&client->dev);
878 if (data->chip->set_power)
879 data->chip->set_power(data, false);
881 error_unregister_device:
882 v4l2_device_unregister(v4l2_dev);
883 mutex_destroy(&data->lock);
884 mutex_destroy(&data->queue_lock);
887 regmap_exit(data->regmap);
895 static void video_i2c_remove(struct i2c_client *client)
897 struct video_i2c_data *data = i2c_get_clientdata(client);
899 pm_runtime_get_sync(&client->dev);
900 pm_runtime_disable(&client->dev);
901 pm_runtime_set_suspended(&client->dev);
902 pm_runtime_put_noidle(&client->dev);
904 if (data->chip->set_power)
905 data->chip->set_power(data, false);
907 video_unregister_device(&data->vdev);
912 static int video_i2c_pm_runtime_suspend(struct device *dev)
914 struct video_i2c_data *data = i2c_get_clientdata(to_i2c_client(dev));
916 if (!data->chip->set_power)
919 return data->chip->set_power(data, false);
922 static int video_i2c_pm_runtime_resume(struct device *dev)
924 struct video_i2c_data *data = i2c_get_clientdata(to_i2c_client(dev));
926 if (!data->chip->set_power)
929 return data->chip->set_power(data, true);
934 static const struct dev_pm_ops video_i2c_pm_ops = {
935 SET_RUNTIME_PM_OPS(video_i2c_pm_runtime_suspend,
936 video_i2c_pm_runtime_resume, NULL)
939 static const struct i2c_device_id video_i2c_id_table[] = {
940 { "amg88xx", (kernel_ulong_t)&video_i2c_chip[AMG88XX] },
941 { "mlx90640", (kernel_ulong_t)&video_i2c_chip[MLX90640] },
944 MODULE_DEVICE_TABLE(i2c, video_i2c_id_table);
946 static const struct of_device_id video_i2c_of_match[] = {
947 { .compatible = "panasonic,amg88xx", .data = &video_i2c_chip[AMG88XX] },
948 { .compatible = "melexis,mlx90640", .data = &video_i2c_chip[MLX90640] },
951 MODULE_DEVICE_TABLE(of, video_i2c_of_match);
953 static struct i2c_driver video_i2c_driver = {
955 .name = VIDEO_I2C_DRIVER,
956 .of_match_table = video_i2c_of_match,
957 .pm = &video_i2c_pm_ops,
959 .probe = video_i2c_probe,
960 .remove = video_i2c_remove,
961 .id_table = video_i2c_id_table,
964 module_i2c_driver(video_i2c_driver);
966 MODULE_AUTHOR("Matt Ranostay <matt.ranostay@konsulko.com>");
967 MODULE_DESCRIPTION("I2C transport video support");
968 MODULE_LICENSE("GPL v2");