// SPDX-License-Identifier: GPL-2.0 /* * video-i2c.c - Support for I2C transport video devices * * Copyright (C) 2018 Matt Ranostay <matt.ranostay@konsulko.com> * * Supported: * - Panasonic AMG88xx Grid-Eye Sensors * - Melexis MLX90640 Thermal Cameras */ #include <linux/bits.h> #include <linux/delay.h> #include <linux/freezer.h> #include <linux/hwmon.h> #include <linux/kthread.h> #include <linux/i2c.h> #include <linux/list.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/of_device.h> #include <linux/pm_runtime.h> #include <linux/nvmem-provider.h> #include <linux/regmap.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/videodev2.h> #include <media/v4l2-common.h> #include <media/v4l2-device.h> #include <media/v4l2-event.h> #include <media/v4l2-fh.h> #include <media/v4l2-ioctl.h> #include <media/videobuf2-v4l2.h> #include <media/videobuf2-vmalloc.h> #define VIDEO_I2C_DRIVER "video-i2c" /* Power control register */ #define AMG88XX_REG_PCTL 0x00 #define AMG88XX_PCTL_NORMAL 0x00 #define AMG88XX_PCTL_SLEEP 0x10 /* Reset register */ #define AMG88XX_REG_RST 0x01 #define AMG88XX_RST_FLAG 0x30 #define AMG88XX_RST_INIT 0x3f /* Frame rate register */ #define AMG88XX_REG_FPSC 0x02 #define AMG88XX_FPSC_1FPS BIT(0) /* Thermistor register */ #define AMG88XX_REG_TTHL 0x0e /* Temperature register */ #define AMG88XX_REG_T01L 0x80 /* RAM */ #define MLX90640_RAM_START_ADDR 0x0400 /* EEPROM */ #define MLX90640_EEPROM_START_ADDR 0x2400 /* Control register */ #define MLX90640_REG_CTL1 0x800d #define MLX90640_REG_CTL1_MASK GENMASK(9, 7) #define MLX90640_REG_CTL1_MASK_SHIFT 7 struct video_i2c_chip; struct video_i2c_buffer { struct vb2_v4l2_buffer vb; struct list_head list; }; struct video_i2c_data { struct regmap *regmap; const struct video_i2c_chip *chip; struct mutex lock; spinlock_t slock; unsigned int sequence; struct mutex queue_lock; struct v4l2_device v4l2_dev; struct video_device vdev; struct vb2_queue vb_vidq; struct task_struct *kthread_vid_cap; struct list_head vid_cap_active; struct v4l2_fract frame_interval; }; static const struct v4l2_fmtdesc amg88xx_format = { .pixelformat = V4L2_PIX_FMT_Y12, }; static const struct v4l2_frmsize_discrete amg88xx_size = { .width = 8, .height = 8, }; static const struct v4l2_fmtdesc mlx90640_format = { .pixelformat = V4L2_PIX_FMT_Y16_BE, }; static const struct v4l2_frmsize_discrete mlx90640_size = { .width = 32, .height = 26, /* 24 lines of pixel data + 2 lines of processing data */ }; static const struct regmap_config amg88xx_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = 0xff }; static const struct regmap_config mlx90640_regmap_config = { .reg_bits = 16, .val_bits = 16, }; struct video_i2c_chip { /* video dimensions */ const struct v4l2_fmtdesc *format; const struct v4l2_frmsize_discrete *size; /* available frame intervals */ const struct v4l2_fract *frame_intervals; unsigned int num_frame_intervals; /* pixel buffer size */ unsigned int buffer_size; /* pixel size in bits */ unsigned int bpp; const struct regmap_config *regmap_config; struct nvmem_config *nvmem_config; /* setup function */ int (*setup)(struct video_i2c_data *data); /* xfer function */ int (*xfer)(struct video_i2c_data *data, char *buf); /* power control function */ int (*set_power)(struct video_i2c_data *data, bool on); /* hwmon init function */ int (*hwmon_init)(struct video_i2c_data *data); }; static int mlx90640_nvram_read(void *priv, unsigned int offset, void *val, size_t bytes) { struct video_i2c_data *data = priv; return regmap_bulk_read(data->regmap, MLX90640_EEPROM_START_ADDR + offset, val, bytes); } static struct nvmem_config mlx90640_nvram_config = { .name = "mlx90640_nvram", .word_size = 2, .stride = 1, .size = 1664, .reg_read = mlx90640_nvram_read, }; static int amg88xx_xfer(struct video_i2c_data *data, char *buf) { return regmap_bulk_read(data->regmap, AMG88XX_REG_T01L, buf, data->chip->buffer_size); } static int mlx90640_xfer(struct video_i2c_data *data, char *buf) { return regmap_bulk_read(data->regmap, MLX90640_RAM_START_ADDR, buf, data->chip->buffer_size); } static int amg88xx_setup(struct video_i2c_data *data) { unsigned int mask = AMG88XX_FPSC_1FPS; unsigned int val; if (data->frame_interval.numerator == data->frame_interval.denominator) val = mask; else val = 0; return regmap_update_bits(data->regmap, AMG88XX_REG_FPSC, mask, val); } static int mlx90640_setup(struct video_i2c_data *data) { unsigned int n, idx; for (n = 0; n < data->chip->num_frame_intervals - 1; n++) { if (V4L2_FRACT_COMPARE(data->frame_interval, ==, data->chip->frame_intervals[n])) break; } idx = data->chip->num_frame_intervals - n - 1; return regmap_update_bits(data->regmap, MLX90640_REG_CTL1, MLX90640_REG_CTL1_MASK, idx << MLX90640_REG_CTL1_MASK_SHIFT); } static int amg88xx_set_power_on(struct video_i2c_data *data) { int ret; ret = regmap_write(data->regmap, AMG88XX_REG_PCTL, AMG88XX_PCTL_NORMAL); if (ret) return ret; msleep(50); ret = regmap_write(data->regmap, AMG88XX_REG_RST, AMG88XX_RST_INIT); if (ret) return ret; usleep_range(2000, 3000); ret = regmap_write(data->regmap, AMG88XX_REG_RST, AMG88XX_RST_FLAG); if (ret) return ret; /* * Wait two frames before reading thermistor and temperature registers */ msleep(200); return 0; } static int amg88xx_set_power_off(struct video_i2c_data *data) { int ret; ret = regmap_write(data->regmap, AMG88XX_REG_PCTL, AMG88XX_PCTL_SLEEP); if (ret) return ret; /* * Wait for a while to avoid resuming normal mode immediately after * entering sleep mode, otherwise the device occasionally goes wrong * (thermistor and temperature registers are not updated at all) */ msleep(100); return 0; } static int amg88xx_set_power(struct video_i2c_data *data, bool on) { if (on) return amg88xx_set_power_on(data); return amg88xx_set_power_off(data); } #if IS_REACHABLE(CONFIG_HWMON) static const u32 amg88xx_temp_config[] = { HWMON_T_INPUT, 0 }; static const struct hwmon_channel_info amg88xx_temp = { .type = hwmon_temp, .config = amg88xx_temp_config, }; static const struct hwmon_channel_info *amg88xx_info[] = { &amg88xx_temp, NULL }; static umode_t amg88xx_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr, int channel) { return 0444; } static int amg88xx_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { struct video_i2c_data *data = dev_get_drvdata(dev); __le16 buf; int tmp; tmp = pm_runtime_resume_and_get(regmap_get_device(data->regmap)); if (tmp < 0) return tmp; tmp = regmap_bulk_read(data->regmap, AMG88XX_REG_TTHL, &buf, 2); pm_runtime_mark_last_busy(regmap_get_device(data->regmap)); pm_runtime_put_autosuspend(regmap_get_device(data->regmap)); if (tmp) return tmp; tmp = le16_to_cpu(buf); /* * Check for sign bit, this isn't a two's complement value but an * absolute temperature that needs to be inverted in the case of being * negative. */ if (tmp & BIT(11)) tmp = -(tmp & 0x7ff); *val = (tmp * 625) / 10; return 0; } static const struct hwmon_ops amg88xx_hwmon_ops = { .is_visible = amg88xx_is_visible, .read = amg88xx_read, }; static const struct hwmon_chip_info amg88xx_chip_info = { .ops = &amg88xx_hwmon_ops, .info = amg88xx_info, }; static int amg88xx_hwmon_init(struct video_i2c_data *data) { struct device *dev = regmap_get_device(data->regmap); void *hwmon = devm_hwmon_device_register_with_info(dev, "amg88xx", data, &amg88xx_chip_info, NULL); return PTR_ERR_OR_ZERO(hwmon); } #else #define amg88xx_hwmon_init NULL #endif enum { AMG88XX, MLX90640, }; static const struct v4l2_fract amg88xx_frame_intervals[] = { { 1, 10 }, { 1, 1 }, }; static const struct v4l2_fract mlx90640_frame_intervals[] = { { 1, 64 }, { 1, 32 }, { 1, 16 }, { 1, 8 }, { 1, 4 }, { 1, 2 }, { 1, 1 }, { 2, 1 }, }; static const struct video_i2c_chip video_i2c_chip[] = { [AMG88XX] = { .size = &amg88xx_size, .format = &amg88xx_format, .frame_intervals = amg88xx_frame_intervals, .num_frame_intervals = ARRAY_SIZE(amg88xx_frame_intervals), .buffer_size = 128, .bpp = 16, .regmap_config = &amg88xx_regmap_config, .setup = &amg88xx_setup, .xfer = &amg88xx_xfer, .set_power = amg88xx_set_power, .hwmon_init = amg88xx_hwmon_init, }, [MLX90640] = { .size = &mlx90640_size, .format = &mlx90640_format, .frame_intervals = mlx90640_frame_intervals, .num_frame_intervals = ARRAY_SIZE(mlx90640_frame_intervals), .buffer_size = 1664, .bpp = 16, .regmap_config = &mlx90640_regmap_config, .nvmem_config = &mlx90640_nvram_config, .setup = mlx90640_setup, .xfer = mlx90640_xfer, }, }; static const struct v4l2_file_operations video_i2c_fops = { .owner = THIS_MODULE, .open = v4l2_fh_open, .release = vb2_fop_release, .poll = vb2_fop_poll, .read = vb2_fop_read, .mmap = vb2_fop_mmap, .unlocked_ioctl = video_ioctl2, }; static int queue_setup(struct vb2_queue *vq, unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[]) { struct video_i2c_data *data = vb2_get_drv_priv(vq); unsigned int size = data->chip->buffer_size; if (vq->num_buffers + *nbuffers < 2) *nbuffers = 2; if (*nplanes) return sizes[0] < size ? -EINVAL : 0; *nplanes = 1; sizes[0] = size; return 0; } static int buffer_prepare(struct vb2_buffer *vb) { struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); struct video_i2c_data *data = vb2_get_drv_priv(vb->vb2_queue); unsigned int size = data->chip->buffer_size; if (vb2_plane_size(vb, 0) < size) return -EINVAL; vbuf->field = V4L2_FIELD_NONE; vb2_set_plane_payload(vb, 0, size); return 0; } static void buffer_queue(struct vb2_buffer *vb) { struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); struct video_i2c_data *data = vb2_get_drv_priv(vb->vb2_queue); struct video_i2c_buffer *buf = container_of(vbuf, struct video_i2c_buffer, vb); spin_lock(&data->slock); list_add_tail(&buf->list, &data->vid_cap_active); spin_unlock(&data->slock); } static int video_i2c_thread_vid_cap(void *priv) { struct video_i2c_data *data = priv; u32 delay = mult_frac(1000000UL, data->frame_interval.numerator, data->frame_interval.denominator); s64 end_us = ktime_to_us(ktime_get()); set_freezable(); do { struct video_i2c_buffer *vid_cap_buf = NULL; s64 current_us; int schedule_delay; try_to_freeze(); spin_lock(&data->slock); if (!list_empty(&data->vid_cap_active)) { vid_cap_buf = list_last_entry(&data->vid_cap_active, struct video_i2c_buffer, list); list_del(&vid_cap_buf->list); } spin_unlock(&data->slock); if (vid_cap_buf) { struct vb2_buffer *vb2_buf = &vid_cap_buf->vb.vb2_buf; void *vbuf = vb2_plane_vaddr(vb2_buf, 0); int ret; ret = data->chip->xfer(data, vbuf); vb2_buf->timestamp = ktime_get_ns(); vid_cap_buf->vb.sequence = data->sequence++; vb2_buffer_done(vb2_buf, ret ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); } end_us += delay; current_us = ktime_to_us(ktime_get()); if (current_us < end_us) { schedule_delay = end_us - current_us; usleep_range(schedule_delay * 3 / 4, schedule_delay); } else { end_us = current_us; } } while (!kthread_should_stop()); return 0; } static void video_i2c_del_list(struct vb2_queue *vq, enum vb2_buffer_state state) { struct video_i2c_data *data = vb2_get_drv_priv(vq); struct video_i2c_buffer *buf, *tmp; spin_lock(&data->slock); list_for_each_entry_safe(buf, tmp, &data->vid_cap_active, list) { list_del(&buf->list); vb2_buffer_done(&buf->vb.vb2_buf, state); } spin_unlock(&data->slock); } static int start_streaming(struct vb2_queue *vq, unsigned int count) { struct video_i2c_data *data = vb2_get_drv_priv(vq); struct device *dev = regmap_get_device(data->regmap); int ret; if (data->kthread_vid_cap) return 0; ret = pm_runtime_resume_and_get(dev); if (ret < 0) goto error_del_list; ret = data->chip->setup(data); if (ret) goto error_rpm_put; data->sequence = 0; data->kthread_vid_cap = kthread_run(video_i2c_thread_vid_cap, data, "%s-vid-cap", data->v4l2_dev.name); ret = PTR_ERR_OR_ZERO(data->kthread_vid_cap); if (!ret) return 0; error_rpm_put: pm_runtime_mark_last_busy(dev); pm_runtime_put_autosuspend(dev); error_del_list: video_i2c_del_list(vq, VB2_BUF_STATE_QUEUED); return ret; } static void stop_streaming(struct vb2_queue *vq) { struct video_i2c_data *data = vb2_get_drv_priv(vq); if (data->kthread_vid_cap == NULL) return; kthread_stop(data->kthread_vid_cap); data->kthread_vid_cap = NULL; pm_runtime_mark_last_busy(regmap_get_device(data->regmap)); pm_runtime_put_autosuspend(regmap_get_device(data->regmap)); video_i2c_del_list(vq, VB2_BUF_STATE_ERROR); } static const struct vb2_ops video_i2c_video_qops = { .queue_setup = queue_setup, .buf_prepare = buffer_prepare, .buf_queue = buffer_queue, .start_streaming = start_streaming, .stop_streaming = stop_streaming, .wait_prepare = vb2_ops_wait_prepare, .wait_finish = vb2_ops_wait_finish, }; static int video_i2c_querycap(struct file *file, void *priv, struct v4l2_capability *vcap) { struct video_i2c_data *data = video_drvdata(file); struct device *dev = regmap_get_device(data->regmap); struct i2c_client *client = to_i2c_client(dev); strscpy(vcap->driver, data->v4l2_dev.name, sizeof(vcap->driver)); strscpy(vcap->card, data->vdev.name, sizeof(vcap->card)); sprintf(vcap->bus_info, "I2C:%d-%d", client->adapter->nr, client->addr); return 0; } static int video_i2c_g_input(struct file *file, void *fh, unsigned int *inp) { *inp = 0; return 0; } static int video_i2c_s_input(struct file *file, void *fh, unsigned int inp) { return (inp > 0) ? -EINVAL : 0; } static int video_i2c_enum_input(struct file *file, void *fh, struct v4l2_input *vin) { if (vin->index > 0) return -EINVAL; strscpy(vin->name, "Camera", sizeof(vin->name)); vin->type = V4L2_INPUT_TYPE_CAMERA; return 0; } static int video_i2c_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *fmt) { struct video_i2c_data *data = video_drvdata(file); enum v4l2_buf_type type = fmt->type; if (fmt->index > 0) return -EINVAL; *fmt = *data->chip->format; fmt->type = type; return 0; } static int video_i2c_enum_framesizes(struct file *file, void *fh, struct v4l2_frmsizeenum *fsize) { const struct video_i2c_data *data = video_drvdata(file); const struct v4l2_frmsize_discrete *size = data->chip->size; /* currently only one frame size is allowed */ if (fsize->index > 0) return -EINVAL; if (fsize->pixel_format != data->chip->format->pixelformat) return -EINVAL; fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; fsize->discrete.width = size->width; fsize->discrete.height = size->height; return 0; } static int video_i2c_enum_frameintervals(struct file *file, void *priv, struct v4l2_frmivalenum *fe) { const struct video_i2c_data *data = video_drvdata(file); const struct v4l2_frmsize_discrete *size = data->chip->size; if (fe->index >= data->chip->num_frame_intervals) return -EINVAL; if (fe->width != size->width || fe->height != size->height) return -EINVAL; fe->type = V4L2_FRMIVAL_TYPE_DISCRETE; fe->discrete = data->chip->frame_intervals[fe->index]; return 0; } static int video_i2c_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt) { const struct video_i2c_data *data = video_drvdata(file); const struct v4l2_frmsize_discrete *size = data->chip->size; struct v4l2_pix_format *pix = &fmt->fmt.pix; unsigned int bpp = data->chip->bpp / 8; pix->width = size->width; pix->height = size->height; pix->pixelformat = data->chip->format->pixelformat; pix->field = V4L2_FIELD_NONE; pix->bytesperline = pix->width * bpp; pix->sizeimage = pix->bytesperline * pix->height; pix->colorspace = V4L2_COLORSPACE_RAW; return 0; } static int video_i2c_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt) { struct video_i2c_data *data = video_drvdata(file); if (vb2_is_busy(&data->vb_vidq)) return -EBUSY; return video_i2c_try_fmt_vid_cap(file, fh, fmt); } static int video_i2c_g_parm(struct file *filp, void *priv, struct v4l2_streamparm *parm) { struct video_i2c_data *data = video_drvdata(filp); if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) return -EINVAL; parm->parm.capture.readbuffers = 1; parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; parm->parm.capture.timeperframe = data->frame_interval; return 0; } static int video_i2c_s_parm(struct file *filp, void *priv, struct v4l2_streamparm *parm) { struct video_i2c_data *data = video_drvdata(filp); int i; for (i = 0; i < data->chip->num_frame_intervals - 1; i++) { if (V4L2_FRACT_COMPARE(parm->parm.capture.timeperframe, <=, data->chip->frame_intervals[i])) break; } data->frame_interval = data->chip->frame_intervals[i]; return video_i2c_g_parm(filp, priv, parm); } static const struct v4l2_ioctl_ops video_i2c_ioctl_ops = { .vidioc_querycap = video_i2c_querycap, .vidioc_g_input = video_i2c_g_input, .vidioc_s_input = video_i2c_s_input, .vidioc_enum_input = video_i2c_enum_input, .vidioc_enum_fmt_vid_cap = video_i2c_enum_fmt_vid_cap, .vidioc_enum_framesizes = video_i2c_enum_framesizes, .vidioc_enum_frameintervals = video_i2c_enum_frameintervals, .vidioc_g_fmt_vid_cap = video_i2c_try_fmt_vid_cap, .vidioc_s_fmt_vid_cap = video_i2c_s_fmt_vid_cap, .vidioc_g_parm = video_i2c_g_parm, .vidioc_s_parm = video_i2c_s_parm, .vidioc_try_fmt_vid_cap = video_i2c_try_fmt_vid_cap, .vidioc_reqbufs = vb2_ioctl_reqbufs, .vidioc_create_bufs = vb2_ioctl_create_bufs, .vidioc_prepare_buf = vb2_ioctl_prepare_buf, .vidioc_querybuf = vb2_ioctl_querybuf, .vidioc_qbuf = vb2_ioctl_qbuf, .vidioc_dqbuf = vb2_ioctl_dqbuf, .vidioc_streamon = vb2_ioctl_streamon, .vidioc_streamoff = vb2_ioctl_streamoff, }; static void video_i2c_release(struct video_device *vdev) { struct video_i2c_data *data = video_get_drvdata(vdev); v4l2_device_unregister(&data->v4l2_dev); mutex_destroy(&data->lock); mutex_destroy(&data->queue_lock); regmap_exit(data->regmap); kfree(data); } static int video_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct video_i2c_data *data; struct v4l2_device *v4l2_dev; struct vb2_queue *queue; int ret = -ENODEV; data = kzalloc(sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; if (dev_fwnode(&client->dev)) data->chip = device_get_match_data(&client->dev); else if (id) data->chip = &video_i2c_chip[id->driver_data]; else goto error_free_device; data->regmap = regmap_init_i2c(client, data->chip->regmap_config); if (IS_ERR(data->regmap)) { ret = PTR_ERR(data->regmap); goto error_free_device; } v4l2_dev = &data->v4l2_dev; strscpy(v4l2_dev->name, VIDEO_I2C_DRIVER, sizeof(v4l2_dev->name)); ret = v4l2_device_register(&client->dev, v4l2_dev); if (ret < 0) goto error_regmap_exit; mutex_init(&data->lock); mutex_init(&data->queue_lock); queue = &data->vb_vidq; queue->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; queue->io_modes = VB2_DMABUF | VB2_MMAP | VB2_USERPTR | VB2_READ; queue->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; queue->drv_priv = data; queue->buf_struct_size = sizeof(struct video_i2c_buffer); queue->min_buffers_needed = 1; queue->ops = &video_i2c_video_qops; queue->mem_ops = &vb2_vmalloc_memops; ret = vb2_queue_init(queue); if (ret < 0) goto error_unregister_device; data->vdev.queue = queue; data->vdev.queue->lock = &data->queue_lock; snprintf(data->vdev.name, sizeof(data->vdev.name), "I2C %d-%d Transport Video", client->adapter->nr, client->addr); data->vdev.v4l2_dev = v4l2_dev; data->vdev.fops = &video_i2c_fops; data->vdev.lock = &data->lock; data->vdev.ioctl_ops = &video_i2c_ioctl_ops; data->vdev.release = video_i2c_release; data->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; spin_lock_init(&data->slock); INIT_LIST_HEAD(&data->vid_cap_active); data->frame_interval = data->chip->frame_intervals[0]; video_set_drvdata(&data->vdev, data); i2c_set_clientdata(client, data); if (data->chip->set_power) { ret = data->chip->set_power(data, true); if (ret) goto error_unregister_device; } pm_runtime_get_noresume(&client->dev); pm_runtime_set_active(&client->dev); pm_runtime_enable(&client->dev); pm_runtime_set_autosuspend_delay(&client->dev, 2000); pm_runtime_use_autosuspend(&client->dev); if (data->chip->hwmon_init) { ret = data->chip->hwmon_init(data); if (ret < 0) { dev_warn(&client->dev, "failed to register hwmon device\n"); } } if (data->chip->nvmem_config) { struct nvmem_config *config = data->chip->nvmem_config; struct nvmem_device *device; config->priv = data; config->dev = &client->dev; device = devm_nvmem_register(&client->dev, config); if (IS_ERR(device)) { dev_warn(&client->dev, "failed to register nvmem device\n"); } } ret = video_register_device(&data->vdev, VFL_TYPE_VIDEO, -1); if (ret < 0) goto error_pm_disable; pm_runtime_mark_last_busy(&client->dev); pm_runtime_put_autosuspend(&client->dev); return 0; error_pm_disable: pm_runtime_disable(&client->dev); pm_runtime_set_suspended(&client->dev); pm_runtime_put_noidle(&client->dev); if (data->chip->set_power) data->chip->set_power(data, false); error_unregister_device: v4l2_device_unregister(v4l2_dev); mutex_destroy(&data->lock); mutex_destroy(&data->queue_lock); error_regmap_exit: regmap_exit(data->regmap); error_free_device: kfree(data); return ret; } static void video_i2c_remove(struct i2c_client *client) { struct video_i2c_data *data = i2c_get_clientdata(client); pm_runtime_get_sync(&client->dev); pm_runtime_disable(&client->dev); pm_runtime_set_suspended(&client->dev); pm_runtime_put_noidle(&client->dev); if (data->chip->set_power) data->chip->set_power(data, false); video_unregister_device(&data->vdev); } #ifdef CONFIG_PM static int video_i2c_pm_runtime_suspend(struct device *dev) { struct video_i2c_data *data = i2c_get_clientdata(to_i2c_client(dev)); if (!data->chip->set_power) return 0; return data->chip->set_power(data, false); } static int video_i2c_pm_runtime_resume(struct device *dev) { struct video_i2c_data *data = i2c_get_clientdata(to_i2c_client(dev)); if (!data->chip->set_power) return 0; return data->chip->set_power(data, true); } #endif static const struct dev_pm_ops video_i2c_pm_ops = { SET_RUNTIME_PM_OPS(video_i2c_pm_runtime_suspend, video_i2c_pm_runtime_resume, NULL) }; static const struct i2c_device_id video_i2c_id_table[] = { { "amg88xx", AMG88XX }, { "mlx90640", MLX90640 }, {} }; MODULE_DEVICE_TABLE(i2c, video_i2c_id_table); static const struct of_device_id video_i2c_of_match[] = { { .compatible = "panasonic,amg88xx", .data = &video_i2c_chip[AMG88XX] }, { .compatible = "melexis,mlx90640", .data = &video_i2c_chip[MLX90640] }, {} }; MODULE_DEVICE_TABLE(of, video_i2c_of_match); static struct i2c_driver video_i2c_driver = { .driver = { .name = VIDEO_I2C_DRIVER, .of_match_table = video_i2c_of_match, .pm = &video_i2c_pm_ops, }, .probe = video_i2c_probe, .remove = video_i2c_remove, .id_table = video_i2c_id_table, }; module_i2c_driver(video_i2c_driver); MODULE_AUTHOR("Matt Ranostay <matt.ranostay@konsulko.com>"); MODULE_DESCRIPTION("I2C transport video support"); MODULE_LICENSE("GPL v2");