Hi Hans,
Thanks for the review.
On 05/23/2016 01:36 PM, Hans Verkuil wrote:
> Hi Todor,
>
> Thanks for the patch series! I got a few comments:
>
> On 05/18/2016 01:50 PM, Todor Tomov wrote:
>> The ov5645 sensor from Omnivision supports up to 2592x1944
>> and CSI2 interface.
>>
>> The driver adds support for the following modes:
>> - 1280x960
>> - 1920x1080
>> - 2592x1944
>>
>> Output format is packed 8bit UYVY.
>>
>> Signed-off-by: Todor Tomov <todor.to...@linaro.org>
>> ---
>> drivers/media/i2c/Kconfig | 11 +
>> drivers/media/i2c/Makefile | 1 +
>> drivers/media/i2c/ov5645.c | 1425
>> ++++++++++++++++++++++++++++++++++++++++++++
>> 3 files changed, 1437 insertions(+)
>> create mode 100644 drivers/media/i2c/ov5645.c
>
> <snip>
>
>>
>> +static int ov5645_change_mode(struct ov5645 *ov5645, enum ov5645_mode mode)
>> +{
>> + struct reg_value *settings;
>> + u32 num_settings;
>> + int ret = 0;
>> +
>> + settings = ov5645_mode_info_data[mode].data;
>> + num_settings = ov5645_mode_info_data[mode].data_size;
>> + ret = ov5645_set_register_array(ov5645, settings, num_settings);
>
> Just do 'return ov5645_set_register_array(ov5645, settings, num_settings);'
> No need for the 'ret' variable.
Ok.
>
>> +
>> + return ret;
>> +}
>> +
>> +static int ov5645_set_power_on(struct ov5645 *ov5645)
>> +{
>> + int ret = 0;
>> +
>> + dev_dbg(ov5645->dev, "%s: Enter\n", __func__);
>> +
>> + ret = clk_prepare_enable(ov5645->xclk);
>> + if (ret < 0) {
>> + dev_err(ov5645->dev, "clk prepare enable failed\n");
>> + return ret;
>> + }
>> +
>> + ret = ov5645_regulators_enable(ov5645);
>> + if (ret < 0) {
>> + clk_disable_unprepare(ov5645->xclk);
>> + return ret;
>> + }
>> +
>> + usleep_range(5000, 15000);
>> + if (ov5645->pwdn_gpio)
>> + gpiod_set_value_cansleep(ov5645->pwdn_gpio, 1);
>> +
>> + usleep_range(1000, 2000);
>> + if (ov5645->rst_gpio)
>> + gpiod_set_value_cansleep(ov5645->rst_gpio, 1);
>> + msleep(20);
>> +
>> + return ret;
>> +}
>> +
>> +static void ov5645_set_power_off(struct ov5645 *ov5645)
>> +{
>> + dev_dbg(ov5645->dev, "%s: Enter\n", __func__);
>> +
>> + if (ov5645->rst_gpio)
>> + gpiod_set_value_cansleep(ov5645->rst_gpio, 0);
>> + if (ov5645->pwdn_gpio)
>> + gpiod_set_value_cansleep(ov5645->pwdn_gpio, 0);
>> + ov5645_regulators_disable(ov5645);
>> + clk_disable_unprepare(ov5645->xclk);
>> +}
>> +
>> +static int ov5645_s_power(struct v4l2_subdev *sd, int on)
>> +{
>> + struct ov5645 *ov5645 = to_ov5645(sd);
>> + int ret = 0;
>> +
>> + dev_dbg(ov5645->dev, "%s: on = %d\n", __func__, on);
>> +
>> + mutex_lock(&ov5645->power_lock);
>> +
>> + /* If the power count is modified from 0 to != 0 or from != 0 to 0,
>> + * update the power state.
>> + */
>> + if (ov5645->power == !on) {
>> + if (on) {
>> + ret = ov5645_set_power_on(ov5645);
>> + if (ret < 0) {
>> + dev_err(ov5645->dev, "could not set power %s\n",
>> + on ? "on" : "off");
>> + goto exit;
>> + }
>> +
>> + ret = ov5645_init(ov5645);
>> + if (ret < 0) {
>> + dev_err(ov5645->dev,
>> + "could not set init registers\n");
>> + goto exit;
>> + }
>> +
>> + ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
>> + OV5645_SYSTEM_CTRL0_STOP);
>> + } else {
>> + ov5645_set_power_off(ov5645);
>> + }
>> +
>> + /* Update the power count. */
>> + ov5645->power += on ? 1 : -1;
>
> Huh? Is ov5645->power a bool or a counter? If it is a counter then this line
> should be outside this 'if'. If it is a bool, then the comments (and the
> power field itself!) should be updated.
>
> As far as I can tell, the 'power' field should be a bool and everything should
> be updated accordingly.
Yes, I'll change it to bool.
>
>
>> + WARN_ON(ov5645->power < 0);
>> + }
>> +
>> +exit:
>> + mutex_unlock(&ov5645->power_lock);
>> +
>> + return ret;
>> +}
>> +
>> +
>> +static int ov5645_set_saturation(struct ov5645 *ov5645, s32 value)
>> +{
>> + u32 reg_value = (value * 0x10) + 0x40;
>> + int ret = 0;
>> +
>> + ret |= ov5645_write_reg(ov5645, OV5645_SDE_SAT_U, reg_value);
>> + ret |= ov5645_write_reg(ov5645, OV5645_SDE_SAT_V, reg_value);
>> +
>> + dev_dbg(ov5645->dev, "%s: value = %d\n", __func__, value);
>> +
>> + return ret;
>> +}
>> +
>> +static int ov5645_set_hflip(struct ov5645 *ov5645, s32 value)
>> +{
>> + u8 val;
>> +
>> + ov5645_read_reg(ov5645, OV5645_TIMING_TC_REG21, &val);
>> + if (value == 0)
>> + val &= ~(OV5645_SENSOR_MIRROR);
>> + else
>> + val |= (OV5645_SENSOR_MIRROR);
>> +
>> + dev_dbg(ov5645->dev, "%s: value = %d\n", __func__, value);
>> +
>> + return ov5645_write_reg(ov5645, OV5645_TIMING_TC_REG21, val);
>> +}
>> +
>> +static int ov5645_set_vflip(struct ov5645 *ov5645, s32 value)
>> +{
>> + u8 val;
>> +
>> + ov5645_read_reg(ov5645, OV5645_TIMING_TC_REG20, &val);
>> + if (value == 0)
>> + val |= (OV5645_SENSOR_VFLIP | OV5645_ISP_VFLIP);
>> + else
>> + val &= ~(OV5645_SENSOR_VFLIP | OV5645_ISP_VFLIP);
>> +
>> + dev_dbg(ov5645->dev, "%s: value = %d\n", __func__, value);
>> +
>> + return ov5645_write_reg(ov5645, OV5645_TIMING_TC_REG20, val);
>> +}
>> +
>> +static int ov5645_set_test_pattern(struct ov5645 *ov5645, s32 value)
>> +{
>> + u8 val;
>> +
>> + ov5645_read_reg(ov5645, OV5645_PRE_ISP_TEST_SETTING_1, &val);
>> +
>> + if (value) {
>> + val &= ~OV5645_SET_TEST_PATTERN(OV5645_TEST_PATTERN_MASK);
>> + val |= OV5645_SET_TEST_PATTERN(value - 1);
>> + val |= OV5645_TEST_PATTERN_ENABLE;
>> + } else {
>> + val &= ~OV5645_TEST_PATTERN_ENABLE;
>> + }
>> +
>> + dev_dbg(ov5645->dev, "%s: value = %d\n", __func__, value);
>> +
>> + return ov5645_write_reg(ov5645, OV5645_PRE_ISP_TEST_SETTING_1, val);
>> +}
>> +
>> +static const char * const ov5645_test_pattern_menu[] = {
>> + "Disabled",
>> + "Vertical Color Bars",
>> + "Random Data",
>> + "Color Square",
>> + "Black Image",
>> +};
>> +
>> +static int ov5645_set_awb(struct ov5645 *ov5645, s32 enable_auto)
>> +{
>> + u8 val;
>> +
>> + ov5645_read_reg(ov5645, OV5645_AWB_MANUAL_CONTROL, &val);
>> + if (enable_auto)
>> + val &= ~OV5645_AWB_MANUAL_ENABLE;
>> + else
>> + val |= OV5645_AWB_MANUAL_ENABLE;
>> +
>> + dev_dbg(ov5645->dev, "%s: enable_auto = %d\n", __func__, enable_auto);
>> +
>> + return ov5645_write_reg(ov5645, OV5645_AWB_MANUAL_CONTROL, val);
>> +}
>> +
>> +static int ov5645_s_ctrl(struct v4l2_ctrl *ctrl)
>> +{
>> + struct ov5645 *ov5645 = container_of(ctrl->handler,
>> + struct ov5645, ctrls);
>> + int ret = -EINVAL;
>> +
>> + mutex_lock(&ov5645->power_lock);
>> + if (ov5645->power == 0) {
>> + mutex_unlock(&ov5645->power_lock);
>> + return 0;
>> + }
>> +
>> + switch (ctrl->id) {
>> + case V4L2_CID_SATURATION:
>> + ret = ov5645_set_saturation(ov5645, ctrl->val);
>> + break;
>> + case V4L2_CID_AUTO_WHITE_BALANCE:
>> + ret = ov5645_set_awb(ov5645, ctrl->val);
>> + break;
>> + case V4L2_CID_AUTOGAIN:
>> + ret = ov5645_set_agc_mode(ov5645, ctrl->val);
>> + break;
>> + case V4L2_CID_EXPOSURE_AUTO:
>> + ret = ov5645_set_aec_mode(ov5645, ctrl->val);
>> + break;
>> + case V4L2_CID_TEST_PATTERN:
>> + ret = ov5645_set_test_pattern(ov5645, ctrl->val);
>> + break;
>> + case V4L2_CID_HFLIP:
>> + ret = ov5645_set_hflip(ov5645, ctrl->val);
>> + break;
>> + case V4L2_CID_VFLIP:
>> + ret = ov5645_set_vflip(ov5645, ctrl->val);
>> + break;
>> + }
>> +
>> + mutex_unlock(&ov5645->power_lock);
>> +
>> + return ret;
>> +}
>> +
>> +static struct v4l2_ctrl_ops ov5645_ctrl_ops = {
>> + .s_ctrl = ov5645_s_ctrl,
>> +};
>> +
>> +static int ov5645_enum_mbus_code(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_pad_config *cfg,
>> + struct v4l2_subdev_mbus_code_enum *code)
>> +{
>> + struct ov5645 *ov5645 = to_ov5645(sd);
>> +
>> + if (code->index > 0)
>> + return -EINVAL;
>> +
>> + code->code = ov5645->fmt.code;
>> +
>> + return 0;
>> +}
>> +
>> +static int ov5645_enum_frame_size(struct v4l2_subdev *subdev,
>> + struct v4l2_subdev_pad_config *cfg,
>> + struct v4l2_subdev_frame_size_enum *fse)
>> +{
>> + if (fse->index >= OV5645_MODE_MAX)
>> + return -EINVAL;
>> +
>> + fse->min_width = ov5645_mode_info_data[fse->index].width;
>> + fse->max_width = ov5645_mode_info_data[fse->index].width;
>> + fse->min_height = ov5645_mode_info_data[fse->index].height;
>> + fse->max_height = ov5645_mode_info_data[fse->index].height;
>> +
>> + return 0;
>> +}
>> +
>> +static struct v4l2_mbus_framefmt *
>> +__ov5645_get_pad_format(struct ov5645 *ov5645,
>> + struct v4l2_subdev_pad_config *cfg,
>> + unsigned int pad,
>> + enum v4l2_subdev_format_whence which)
>> +{
>> + switch (which) {
>> + case V4L2_SUBDEV_FORMAT_TRY:
>> + return v4l2_subdev_get_try_format(&ov5645->sd, cfg, pad);
>> + case V4L2_SUBDEV_FORMAT_ACTIVE:
>> + return &ov5645->fmt;
>> + default:
>> + return NULL;
>> + }
>> +}
>> +
>> +static int ov5645_get_format(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_pad_config *cfg,
>> + struct v4l2_subdev_format *format)
>> +{
>> + struct ov5645 *ov5645 = to_ov5645(sd);
>> +
>> + format->format = *__ov5645_get_pad_format(ov5645, cfg, format->pad,
>> + format->which);
>> + return 0;
>> +}
>> +
>> +static struct v4l2_rect *
>> +__ov5645_get_pad_crop(struct ov5645 *ov5645, struct v4l2_subdev_pad_config
>> *cfg,
>> + unsigned int pad, enum v4l2_subdev_format_whence which)
>> +{
>> + switch (which) {
>> + case V4L2_SUBDEV_FORMAT_TRY:
>> + return v4l2_subdev_get_try_crop(&ov5645->sd, cfg, pad);
>> + case V4L2_SUBDEV_FORMAT_ACTIVE:
>> + return &ov5645->crop;
>> + default:
>> + return NULL;
>> + }
>> +}
>> +
>> +static enum ov5645_mode ov5645_find_nearest_mode(struct ov5645 *ov5645,
>> + int width, int height)
>> +{
>> + int i;
>> +
>> + for (i = OV5645_MODE_MAX; i >= 0; i--) {
>> + if (ov5645_mode_info_data[i].width <= width &&
>> + ov5645_mode_info_data[i].height <= height)
>> + break;
>> + }
>> +
>> + if (i < 0)
>> + i = 0;
>> +
>> + return (enum ov5645_mode)i;
>> +}
>> +
>> +static int ov5645_set_format(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_pad_config *cfg,
>> + struct v4l2_subdev_format *format)
>> +{
>> + struct ov5645 *ov5645 = to_ov5645(sd);
>> + struct v4l2_mbus_framefmt *__format;
>> + struct v4l2_rect *__crop;
>> + enum ov5645_mode new_mode;
>> +
>> + __crop = __ov5645_get_pad_crop(ov5645, cfg, format->pad,
>> + format->which);
>> +
>> + new_mode = ov5645_find_nearest_mode(ov5645,
>> + format->format.width, format->format.height);
>> + __crop->width = ov5645_mode_info_data[new_mode].width;
>> + __crop->height = ov5645_mode_info_data[new_mode].height;
>> +
>> + ov5645->current_mode = new_mode;
>> +
>> + __format = __ov5645_get_pad_format(ov5645, cfg, format->pad,
>> + format->which);
>> + __format->width = __crop->width;
>> + __format->height = __crop->height;
>> +
>> + return 0;
>> +}
>> +
>> +static int ov5645_get_selection(struct v4l2_subdev *sd,
>> + struct v4l2_subdev_pad_config *cfg,
>> + struct v4l2_subdev_selection *sel)
>> +{
>> + struct ov5645 *ov5645 = to_ov5645(sd);
>> +
>> + if (sel->target != V4L2_SEL_TGT_CROP)
>> + return -EINVAL;
>> +
>> + sel->r = *__ov5645_get_pad_crop(ov5645, cfg, sel->pad,
>> + sel->which);
>> + return 0;
>> +}
>> +
>> +static int ov5645_registered(struct v4l2_subdev *subdev)
>> +{
>> + struct i2c_client *client = v4l2_get_subdevdata(subdev);
>> + struct ov5645 *ov5645 = to_ov5645(subdev);
>> + u8 chip_id_high, chip_id_low;
>> + int ret;
>> +
>> + ov5645_s_power(&ov5645->sd, true);
>> +
>> + ret = ov5645_read_reg(ov5645, OV5645_CHIP_ID_HIGH_REG, &chip_id_high);
>> + if (ret < 0 || chip_id_high != OV5645_CHIP_ID_HIGH) {
>> + dev_err(ov5645->dev, "could not read ID high\n");
>> + ret = -ENODEV;
>> + goto reg_power_off;
>> + }
>> + ret = ov5645_read_reg(ov5645, OV5645_CHIP_ID_LOW_REG, &chip_id_low);
>> + if (ret < 0 || chip_id_low != OV5645_CHIP_ID_LOW) {
>> + dev_err(ov5645->dev, "could not read ID low\n");
>> + ret = -ENODEV;
>> + goto reg_power_off;
>> + }
>> +
>> + dev_info(&client->dev, "OV5645 detected at address 0x%02x\n",
>> + client->addr);
>> +
>> + ov5645_s_power(&ov5645->sd, false);
>> +
>> + return 0;
>> +
>> +reg_power_off:
>> + ov5645_s_power(&ov5645->sd, false);
>> + return ret;
>> +}
>
> Why do this here instead of in the probe() function? I see no reason for
> having a ov5645_registered() function.
Ok, I'll move it to the probe.
>
>> +
>> +static int ov5645_s_stream(struct v4l2_subdev *subdev, int enable)
>> +{
>> + struct ov5645 *ov5645 = to_ov5645(subdev);
>> + int ret;
>> +
>> + dev_dbg(ov5645->dev, "%s: enable = %d\n", __func__, enable);
>> +
>> + if (enable) {
>> + ret = ov5645_change_mode(ov5645, ov5645->current_mode);
>> + if (ret < 0) {
>> + dev_err(ov5645->dev, "could not set mode %d\n",
>> + ov5645->current_mode);
>> + return ret;
>> + }
>> + ret = v4l2_ctrl_handler_setup(&ov5645->ctrls);
>> + if (ret < 0) {
>> + dev_err(ov5645->dev, "could not sync v4l2 controls\n");
>> + return ret;
>> + }
>> + ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
>> + OV5645_SYSTEM_CTRL0_START);
>> + } else {
>> + ov5645_write_reg(ov5645, OV5645_SYSTEM_CTRL0,
>> + OV5645_SYSTEM_CTRL0_STOP);
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static struct v4l2_subdev_core_ops ov5645_core_ops = {
>> + .s_power = ov5645_s_power,
>> +};
>> +
>> +static struct v4l2_subdev_video_ops ov5645_video_ops = {
>> + .s_stream = ov5645_s_stream,
>> +};
>> +
>> +static struct v4l2_subdev_pad_ops ov5645_subdev_pad_ops = {
>> + .enum_mbus_code = ov5645_enum_mbus_code,
>> + .enum_frame_size = ov5645_enum_frame_size,
>> + .get_fmt = ov5645_get_format,
>> + .set_fmt = ov5645_set_format,
>> + .get_selection = ov5645_get_selection,
>> +};
>> +
>> +static struct v4l2_subdev_ops ov5645_subdev_ops = {
>> + .core = &ov5645_core_ops,
>> + .video = &ov5645_video_ops,
>> + .pad = &ov5645_subdev_pad_ops,
>> +};
>> +
>> +static const struct v4l2_subdev_internal_ops ov5645_subdev_internal_ops = {
>> + .registered = ov5645_registered,
>> +};
>> +
>> +static int ov5645_probe(struct i2c_client *client,
>> + const struct i2c_device_id *id)
>> +{
>> + struct device *dev = &client->dev;
>> + struct device_node *endpoint;
>> + struct ov5645 *ov5645;
>> + int ret = 0;
>> +
>> + ov5645 = devm_kzalloc(dev, sizeof(struct ov5645), GFP_KERNEL);
>> + if (!ov5645)
>> + return -ENOMEM;
>> +
>> + ov5645->i2c_client = client;
>> + ov5645->dev = dev;
>> + ov5645->fmt.code = MEDIA_BUS_FMT_UYVY8_2X8;
>> + ov5645->fmt.width = 1920;
>> + ov5645->fmt.height = 1080;
>> + ov5645->fmt.field = V4L2_FIELD_NONE;
>> + ov5645->fmt.colorspace = V4L2_COLORSPACE_SRGB;
>> + ov5645->current_mode = OV5645_MODE_1080P;
>> +
>> + endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
>> + if (!endpoint) {
>> + dev_err(dev, "endpoint node not found\n");
>> + return -EINVAL;
>> + }
>> +
>> + ret = v4l2_of_parse_endpoint(endpoint, &ov5645->ep);
>> + if (ret < 0) {
>> + dev_err(dev, "parsing endpoint node failed\n");
>> + return ret;
>> + }
>> + if (ov5645->ep.bus_type != V4L2_MBUS_CSI2) {
>> + dev_err(dev, "invalid bus type, must be CSI2\n");
>> + of_node_put(endpoint);
>> + return -EINVAL;
>> + }
>> + of_node_put(endpoint);
>> +
>> + /* get system clock (xclk) */
>> + ov5645->xclk = devm_clk_get(dev, "xclk");
>> + if (IS_ERR(ov5645->xclk)) {
>> + dev_err(dev, "could not get xclk");
>> + return PTR_ERR(ov5645->xclk);
>> + }
>> +
>> + ov5645->io_regulator = devm_regulator_get(dev, "dovdd");
>> + if (IS_ERR(ov5645->io_regulator)) {
>> + switch(PTR_ERR(ov5645->io_regulator)) {
>> + case -ENODEV:
>> + /* Regulator is optional so this is ok - continue */
>> + ov5645->io_regulator = NULL;
>> + dev_dbg(dev, "io regulator not present\n");
>> + break;
>> + case -EPROBE_DEFER:
>> + dev_dbg(dev, "io regulator probe defered\n");
>> + return -EPROBE_DEFER;
>> + default:
>> + dev_err(dev, "cannot get io regulator\n");
>> + return PTR_ERR(ov5645->io_regulator);
>> + }
>> + } else {
>> + ret = regulator_set_voltage(ov5645->io_regulator,
>> + OV5645_VOLTAGE_DIGITAL_IO,
>> + OV5645_VOLTAGE_DIGITAL_IO);
>> + if (ret < 0) {
>> + dev_err(dev, "cannot set io voltage\n");
>> + return ret;
>> + }
>> + }
>> +
>> + ov5645->core_regulator = devm_regulator_get(dev, "dvdd");
>> + if (IS_ERR(ov5645->core_regulator)) {
>> + switch(PTR_ERR(ov5645->core_regulator)) {
>> + case -ENODEV:
>> + /* Regulator is optional so this is ok - continue */
>> + ov5645->core_regulator = NULL;
>> + dev_dbg(dev, "core regulator not present\n");
>> + break;
>> + case -EPROBE_DEFER:
>> + dev_dbg(dev, "core regulator probe defered\n");
>> + return -EPROBE_DEFER;
>> + default:
>> + dev_err(dev, "cannot get core regulator\n");
>> + return PTR_ERR(ov5645->core_regulator);
>> + }
>> + } else {
>> + ret = regulator_set_voltage(ov5645->core_regulator,
>> + OV5645_VOLTAGE_DIGITAL_CORE,
>> + OV5645_VOLTAGE_DIGITAL_CORE);
>> + if (ret < 0) {
>> + dev_err(dev, "cannot set core voltage\n");
>> + return ret;
>> + }
>> + }
>> +
>> + ov5645->analog_regulator = devm_regulator_get(dev, "avdd");
>> + if (IS_ERR(ov5645->analog_regulator)) {
>> + switch(PTR_ERR(ov5645->analog_regulator)) {
>> + case -ENODEV:
>> + /* Regulator is optional so this is ok - continue */
>> + ov5645->analog_regulator = NULL;
>> + dev_dbg(dev, "analog regulator not present\n");
>> + break;
>> + case -EPROBE_DEFER:
>> + dev_dbg(dev, "analog regulator probe defered\n");
>> + return -EPROBE_DEFER;
>> + default:
>> + dev_err(dev, "cannot get analog regulator\n");
>> + return PTR_ERR(ov5645->analog_regulator);
>> + }
>> + } else {
>> + ret = regulator_set_voltage(ov5645->analog_regulator,
>> + OV5645_VOLTAGE_ANALOG,
>> + OV5645_VOLTAGE_ANALOG);
>> + if (ret < 0) {
>> + dev_err(dev, "cannot set analog voltage\n");
>> + return ret;
>> + }
>> + }
>> +
>> + ov5645->pwdn_gpio = devm_gpiod_get(dev, "pwdn", GPIOD_OUT_LOW);
>> + if (IS_ERR(ov5645->pwdn_gpio)) {
>> + switch(PTR_ERR(ov5645->pwdn_gpio)) {
>> + case -ENOENT:
>> + /* GPIO is optional so this is ok - continue */
>> + ov5645->pwdn_gpio = NULL;
>> + dev_dbg(dev, "power down gpio not present\n");
>> + break;
>> + case -EPROBE_DEFER:
>> + dev_dbg(dev, "power down gpio probe defered\n");
>> + return -EPROBE_DEFER;
>> + default:
>> + dev_err(dev, "cannot get power down gpio\n");
>> + return PTR_ERR(ov5645->pwdn_gpio);
>> + }
>> + }
>> +
>> + ov5645->rst_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
>> + if (IS_ERR(ov5645->rst_gpio)) {
>> + switch(PTR_ERR(ov5645->rst_gpio)) {
>> + case -ENOENT:
>> + /* GPIO is optional so this is ok - continue */
>> + ov5645->rst_gpio = NULL;
>> + dev_dbg(dev, "reset gpio not present\n");
>> + break;
>> + case -EPROBE_DEFER:
>> + dev_dbg(dev, "reset gpio probe defered\n");
>> + return -EPROBE_DEFER;
>> + default:
>> + dev_err(dev, "cannot get reset gpio\n");
>> + return PTR_ERR(ov5645->rst_gpio);
>> + }
>> + }
>> +
>> + mutex_init(&ov5645->power_lock);
>> +
>> + v4l2_ctrl_handler_init(&ov5645->ctrls, 7);
>> + ov5645->saturation = v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
>> + V4L2_CID_SATURATION, -4, 4, 1, 0);
>> + ov5645->hflip = v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
>> + V4L2_CID_HFLIP, 0, 1, 1, 0);
>> + ov5645->vflip = v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
>> + V4L2_CID_VFLIP, 0, 1, 1, 0);
>> + ov5645->autogain = v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
>> + V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
>> + ov5645->autoexposure = v4l2_ctrl_new_std_menu(&ov5645->ctrls,
>> + &ov5645_ctrl_ops, V4L2_CID_EXPOSURE_AUTO,
>> + V4L2_EXPOSURE_MANUAL, 0, V4L2_EXPOSURE_AUTO);
>> + ov5645->awb = v4l2_ctrl_new_std(&ov5645->ctrls, &ov5645_ctrl_ops,
>> + V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
>> + ov5645->pattern = v4l2_ctrl_new_std_menu_items(&ov5645->ctrls,
>> + &ov5645_ctrl_ops, V4L2_CID_TEST_PATTERN,
>> + ARRAY_SIZE(ov5645_test_pattern_menu) - 1, 0, 0,
>> + ov5645_test_pattern_menu);
>> +
>> + ov5645->sd.ctrl_handler = &ov5645->ctrls;
>> +
>> + if (ov5645->ctrls.error) {
>> + dev_err(dev, "%s: control initialization error %d\n",
>> + __func__, ov5645->ctrls.error);
>> + ret = ov5645->ctrls.error;
>> + goto free_ctrl;
>> + }
>> +
>> + v4l2_i2c_subdev_init(&ov5645->sd, client, &ov5645_subdev_ops);
>> + ov5645->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
>> + ov5645->pad.flags = MEDIA_PAD_FL_SOURCE;
>> + ov5645->sd.internal_ops = &ov5645_subdev_internal_ops;
>> +
>> + ret = media_entity_init(&ov5645->sd.entity, 1, &ov5645->pad, 0);
>> + if (ret < 0) {
>> + dev_err(dev, "could not register media entity\n");
>> + goto free_ctrl;
>> + }
>> +
>> + ov5645->sd.dev = &client->dev;
>> + ret = v4l2_async_register_subdev(&ov5645->sd);
>> + if (ret < 0) {
>> + dev_err(dev, "could not register v4l2 device\n");
>> + goto free_entity;
>> + }
>> +
>> + return 0;
>> +
>> +free_entity:
>> + media_entity_cleanup(&ov5645->sd.entity);
>> +free_ctrl:
>> + v4l2_ctrl_handler_free(&ov5645->ctrls);
>> +
>> + return ret;
>> +}
>> +
>> +
>> +static int ov5645_remove(struct i2c_client *client)
>> +{
>> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
>> + struct ov5645 *ov5645 = to_ov5645(sd);
>> +
>> + v4l2_async_unregister_subdev(&ov5645->sd);
>> + media_entity_cleanup(&ov5645->sd.entity);
>> + v4l2_ctrl_handler_free(&ov5645->ctrls);
>> +
>> + return 0;
>> +}
>> +
>> +
>> +static const struct i2c_device_id ov5645_id[] = {
>> + { "ov5645", 0 },
>> + {}
>> +};
>> +MODULE_DEVICE_TABLE(i2c, ov5645_id);
>> +
>> +#if IS_ENABLED(CONFIG_OF)
>> +static const struct of_device_id ov5645_of_match[] = {
>> + { .compatible = "ovti,ov5645" },
>> + { /* sentinel */ }
>> +};
>> +MODULE_DEVICE_TABLE(of, ov5645_of_match);
>> +#endif
>> +
>> +static struct i2c_driver ov5645_i2c_driver = {
>> + .driver = {
>> + .of_match_table = of_match_ptr(ov5645_of_match),
>> + .name = "ov5645",
>> + },
>> + .probe = ov5645_probe,
>> + .remove = ov5645_remove,
>> + .id_table = ov5645_id,
>> +};
>> +
>> +module_i2c_driver(ov5645_i2c_driver);
>> +
>> +MODULE_DESCRIPTION("Omnivision OV5645 Camera Driver");
>> +MODULE_AUTHOR("Todor Tomov <todor.to...@linaro.org>");
>> +MODULE_LICENSE("GPL v2");
>>
>
> Regards,
>
> Hans
> --
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--
Best regards,
Todor Tomov
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