#include <linux/clk.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
#include <linux/sysfs.h>
#include <media/media-entity.h>
#include <media/v4l2-async.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-subdev.h>
#define CHIP_ID 0x2685
#define OV2685_REG_CHIP_ID 0x300a
#define OV2685_XVCLK_FREQ 24000000
#define REG_SC_CTRL_MODE 0x0100
#define SC_CTRL_MODE_STANDBY 0x0
#define SC_CTRL_MODE_STREAMING BIT(0)
#define OV2685_REG_EXPOSURE 0x3500
#define OV2685_EXPOSURE_MIN 4
#define OV2685_EXPOSURE_STEP 1
#define OV2685_REG_VTS 0x380e
#define OV2685_VTS_MAX 0x7fff
#define OV2685_REG_GAIN 0x350a
#define OV2685_GAIN_MIN 0
#define OV2685_GAIN_MAX 0x07ff
#define OV2685_GAIN_STEP 0x1
#define OV2685_GAIN_DEFAULT 0x0036
#define OV2685_REG_TEST_PATTERN 0x5080
#define OV2685_TEST_PATTERN_DISABLED 0x00
#define OV2685_TEST_PATTERN_COLOR_BAR 0x80
#define OV2685_TEST_PATTERN_RANDOM 0x81
#define OV2685_TEST_PATTERN_COLOR_BAR_FADE 0x88
#define OV2685_TEST_PATTERN_BW_SQUARE 0x92
#define OV2685_TEST_PATTERN_COLOR_SQUARE 0x82
#define REG_NULL 0xFFFF
#define OV2685_REG_VALUE_08BIT 1
#define OV2685_REG_VALUE_16BIT 2
#define OV2685_REG_VALUE_24BIT 3
#define OV2685_NATIVE_WIDTH 1616
#define OV2685_NATIVE_HEIGHT 1216
#define OV2685_LANES 1
#define OV2685_BITS_PER_SAMPLE 10
static const char * const ov2685_supply_names[] = {
"avdd",
"dovdd",
"dvdd",
};
#define OV2685_NUM_SUPPLIES ARRAY_SIZE(ov2685_supply_names)
struct regval {
u16 addr;
u8 val;
};
struct ov2685_mode {
u32 width;
u32 height;
u32 exp_def;
u32 hts_def;
u32 vts_def;
const struct v4l2_rect *analog_crop;
const struct regval *reg_list;
};
struct ov2685 {
struct i2c_client *client;
struct clk *xvclk;
struct gpio_desc *reset_gpio;
struct regulator_bulk_data supplies[OV2685_NUM_SUPPLIES];
struct mutex mutex;
struct v4l2_subdev subdev;
struct media_pad pad;
struct v4l2_ctrl *anal_gain;
struct v4l2_ctrl *exposure;
struct v4l2_ctrl *hblank;
struct v4l2_ctrl *vblank;
struct v4l2_ctrl *test_pattern;
struct v4l2_ctrl_handler ctrl_handler;
const struct ov2685_mode *cur_mode;
};
#define to_ov2685(sd) container_of(sd, struct ov2685, subdev)
static struct regval ov2685_1600x1200_regs[] = {
{0x0103, 0x01},
{0x0100, 0x00},
{0x3002, 0x00},
{0x3016, 0x1c},
{0x3018, 0x44},
{0x301d, 0xf0},
{0x3020, 0x00},
{0x3082, 0x37},
{0x3083, 0x03},
{0x3084, 0x09},
{0x3085, 0x04},
{0x3086, 0x00},
{0x3087, 0x00},
{0x3501, 0x4e},
{0x3502, 0xe0},
{0x3503, 0x27},
{0x350b, 0x36},
{0x3600, 0xb4},
{0x3603, 0x35},
{0x3604, 0x24},
{0x3605, 0x00},
{0x3620, 0x24},
{0x3621, 0x34},
{0x3622, 0x03},
{0x3628, 0x10},
{0x3705, 0x3c},
{0x370a, 0x21},
{0x370c, 0x50},
{0x370d, 0xc0},
{0x3717, 0x58},
{0x3718, 0x80},
{0x3720, 0x00},
{0x3721, 0x09},
{0x3722, 0x06},
{0x3723, 0x59},
{0x3738, 0x99},
{0x3781, 0x80},
{0x3784, 0x0c},
{0x3789, 0x60},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x00},
{0x3804, 0x06},
{0x3805, 0x4f},
{0x3806, 0x04},
{0x3807, 0xbf},
{0x3808, 0x06},
{0x3809, 0x40},
{0x380a, 0x04},
{0x380b, 0xb0},
{0x380c, 0x06},
{0x380d, 0xa4},
{0x380e, 0x05},
{0x380f, 0x0e},
{0x3810, 0x00},
{0x3811, 0x08},
{0x3812, 0x00},
{0x3813, 0x08},
{0x3814, 0x11},
{0x3815, 0x11},
{0x3819, 0x04},
{0x3820, 0xc0},
{0x3821, 0x00},
{0x3a06, 0x01},
{0x3a07, 0x84},
{0x3a08, 0x01},
{0x3a09, 0x43},
{0x3a0a, 0x24},
{0x3a0b, 0x60},
{0x3a0c, 0x28},
{0x3a0d, 0x60},
{0x3a0e, 0x04},
{0x3a0f, 0x8c},
{0x3a10, 0x05},
{0x3a11, 0x0c},
{0x4000, 0x81},
{0x4001, 0x40},
{0x4008, 0x02},
{0x4009, 0x09},
{0x4300, 0x00},
{0x430e, 0x00},
{0x4602, 0x02},
{0x481b, 0x40},
{0x481f, 0x40},
{0x4837, 0x18},
{0x5000, 0x1f},
{0x5001, 0x05},
{0x5002, 0x30},
{0x5003, 0x04},
{0x5004, 0x00},
{0x5005, 0x0c},
{0x5280, 0x15},
{0x5281, 0x06},
{0x5282, 0x06},
{0x5283, 0x08},
{0x5284, 0x1c},
{0x5285, 0x1c},
{0x5286, 0x20},
{0x5287, 0x10},
{REG_NULL, 0x00}
};
#define OV2685_LINK_FREQ_330MHZ 330000000
static const s64 link_freq_menu_items[] = {
OV2685_LINK_FREQ_330MHZ
};
static const char * const ov2685_test_pattern_menu[] = {
"Disabled",
"Color Bar",
"Color Bar FADE",
"Random Data",
"Black White Square",
"Color Square"
};
static const int ov2685_test_pattern_val[] = {
OV2685_TEST_PATTERN_DISABLED,
OV2685_TEST_PATTERN_COLOR_BAR,
OV2685_TEST_PATTERN_COLOR_BAR_FADE,
OV2685_TEST_PATTERN_RANDOM,
OV2685_TEST_PATTERN_BW_SQUARE,
OV2685_TEST_PATTERN_COLOR_SQUARE,
};
static const struct v4l2_rect ov2685_analog_crop = {
.left = 8,
.top = 8,
.width = 1600,
.height = 1200,
};
static const struct ov2685_mode supported_modes[] = {
{
.width = 1600,
.height = 1200,
.exp_def = 0x04ee,
.hts_def = 0x06a4,
.vts_def = 0x050e,
.analog_crop = &ov2685_analog_crop,
.reg_list = ov2685_1600x1200_regs,
},
};
static int ov2685_write_reg(struct i2c_client *client, u16 reg,
u32 len, u32 val)
{
u32 val_i, buf_i;
u8 buf[6];
u8 *val_p;
__be32 val_be;
if (len > 4)
return -EINVAL;
buf[0] = reg >> 8;
buf[1] = reg & 0xff;
val_be = cpu_to_be32(val);
val_p = (u8 *)&val_be;
buf_i = 2;
val_i = 4 - len;
while (val_i < 4)
buf[buf_i++] = val_p[val_i++];
if (i2c_master_send(client, buf, len + 2) != len + 2)
return -EIO;
return 0;
}
static int ov2685_write_array(struct i2c_client *client,
const struct regval *regs)
{
int ret = 0;
u32 i;
for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++)
ret = ov2685_write_reg(client, regs[i].addr,
OV2685_REG_VALUE_08BIT, regs[i].val);
return ret;
}
static int ov2685_read_reg(struct i2c_client *client, u16 reg,
u32 len, u32 *val)
{
struct i2c_msg msgs[2];
u8 *data_be_p;
__be32 data_be = 0;
__be16 reg_addr_be = cpu_to_be16(reg);
int ret;
if (len > 4)
return -EINVAL;
data_be_p = (u8 *)&data_be;
msgs[0].addr = client->addr;
msgs[0].flags = 0;
msgs[0].len = 2;
msgs[0].buf = (u8 *)®_addr_be;
msgs[1].addr = client->addr;
msgs[1].flags = I2C_M_RD;
msgs[1].len = len;
msgs[1].buf = &data_be_p[4 - len];
ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (ret != ARRAY_SIZE(msgs))
return -EIO;
*val = be32_to_cpu(data_be);
return 0;
}
static void ov2685_fill_fmt(const struct ov2685_mode *mode,
struct v4l2_mbus_framefmt *fmt)
{
fmt->code = MEDIA_BUS_FMT_SBGGR10_1X10;
fmt->width = mode->width;
fmt->height = mode->height;
fmt->field = V4L2_FIELD_NONE;
}
static int ov2685_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct ov2685 *ov2685 = to_ov2685(sd);
struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format;
ov2685_fill_fmt(ov2685->cur_mode, mbus_fmt);
return 0;
}
static int ov2685_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct ov2685 *ov2685 = to_ov2685(sd);
struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format;
ov2685_fill_fmt(ov2685->cur_mode, mbus_fmt);
return 0;
}
static int ov2685_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
if (code->index >= ARRAY_SIZE(supported_modes))
return -EINVAL;
code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
return 0;
}
static int ov2685_enum_frame_sizes(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_size_enum *fse)
{
int index = fse->index;
if (index >= ARRAY_SIZE(supported_modes))
return -EINVAL;
fse->code = MEDIA_BUS_FMT_SBGGR10_1X10;
fse->min_width = supported_modes[index].width;
fse->max_width = supported_modes[index].width;
fse->max_height = supported_modes[index].height;
fse->min_height = supported_modes[index].height;
return 0;
}
static const struct v4l2_rect *
__ov2685_get_pad_crop(struct ov2685 *ov2685,
struct v4l2_subdev_state *state, unsigned int pad,
enum v4l2_subdev_format_whence which)
{
const struct ov2685_mode *mode = ov2685->cur_mode;
switch (which) {
case V4L2_SUBDEV_FORMAT_TRY:
return v4l2_subdev_state_get_crop(state, pad);
case V4L2_SUBDEV_FORMAT_ACTIVE:
return mode->analog_crop;
}
return NULL;
}
static int ov2685_get_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel)
{
struct ov2685 *ov2685 = to_ov2685(sd);
switch (sel->target) {
case V4L2_SEL_TGT_CROP:
mutex_lock(&ov2685->mutex);
sel->r = *__ov2685_get_pad_crop(ov2685, sd_state, sel->pad,
sel->which);
mutex_unlock(&ov2685->mutex);
break;
case V4L2_SEL_TGT_NATIVE_SIZE:
case V4L2_SEL_TGT_CROP_BOUNDS:
sel->r.top = 0;
sel->r.left = 0;
sel->r.width = OV2685_NATIVE_WIDTH;
sel->r.height = OV2685_NATIVE_HEIGHT;
break;
case V4L2_SEL_TGT_CROP_DEFAULT:
sel->r = ov2685_analog_crop;
break;
default:
return -EINVAL;
}
return 0;
}
static inline u32 ov2685_cal_delay(u32 cycles)
{
return DIV_ROUND_UP(cycles, OV2685_XVCLK_FREQ / 1000 / 1000);
}
static int __ov2685_power_on(struct ov2685 *ov2685)
{
int ret;
u32 delay_us;
struct device *dev = &ov2685->client->dev;
ret = clk_prepare_enable(ov2685->xvclk);
if (ret < 0) {
dev_err(dev, "Failed to enable xvclk\n");
return ret;
}
gpiod_set_value_cansleep(ov2685->reset_gpio, 1);
ret = regulator_bulk_enable(OV2685_NUM_SUPPLIES, ov2685->supplies);
if (ret < 0) {
dev_err(dev, "Failed to enable regulators\n");
goto disable_clk;
}
gpiod_set_value_cansleep(ov2685->reset_gpio, 0);
delay_us = ov2685_cal_delay(8192);
usleep_range(delay_us, delay_us * 2);
ret = ov2685_write_array(ov2685->client, ov2685->cur_mode->reg_list);
if (ret) {
dev_err(dev, "Failed to set regs for power on\n");
goto disable_supplies;
}
return 0;
disable_supplies:
regulator_bulk_disable(OV2685_NUM_SUPPLIES, ov2685->supplies);
disable_clk:
clk_disable_unprepare(ov2685->xvclk);
return ret;
}
static void __ov2685_power_off(struct ov2685 *ov2685)
{
u32 delay_us = ov2685_cal_delay(512);
usleep_range(delay_us, delay_us * 2);
clk_disable_unprepare(ov2685->xvclk);
gpiod_set_value_cansleep(ov2685->reset_gpio, 1);
regulator_bulk_disable(OV2685_NUM_SUPPLIES, ov2685->supplies);
}
static int ov2685_s_stream(struct v4l2_subdev *sd, int on)
{
struct ov2685 *ov2685 = to_ov2685(sd);
struct i2c_client *client = ov2685->client;
int ret = 0;
mutex_lock(&ov2685->mutex);
if (on) {
ret = pm_runtime_resume_and_get(&ov2685->client->dev);
if (ret < 0)
goto unlock_and_return;
ret = __v4l2_ctrl_handler_setup(&ov2685->ctrl_handler);
if (ret) {
pm_runtime_put(&client->dev);
goto unlock_and_return;
}
ret = ov2685_write_reg(client, REG_SC_CTRL_MODE,
OV2685_REG_VALUE_08BIT, SC_CTRL_MODE_STREAMING);
if (ret) {
pm_runtime_put(&client->dev);
goto unlock_and_return;
}
} else {
ov2685_write_reg(client, REG_SC_CTRL_MODE,
OV2685_REG_VALUE_08BIT, SC_CTRL_MODE_STANDBY);
pm_runtime_put(&ov2685->client->dev);
}
unlock_and_return:
mutex_unlock(&ov2685->mutex);
return ret;
}
static int ov2685_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
struct ov2685 *ov2685 = to_ov2685(sd);
struct v4l2_mbus_framefmt *try_fmt;
mutex_lock(&ov2685->mutex);
try_fmt = v4l2_subdev_state_get_format(fh->state, 0);
ov2685_fill_fmt(&supported_modes[0], try_fmt);
mutex_unlock(&ov2685->mutex);
return 0;
}
static int __maybe_unused ov2685_runtime_resume(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct ov2685 *ov2685 = to_ov2685(sd);
return __ov2685_power_on(ov2685);
}
static int __maybe_unused ov2685_runtime_suspend(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct ov2685 *ov2685 = to_ov2685(sd);
__ov2685_power_off(ov2685);
return 0;
}
static const struct dev_pm_ops ov2685_pm_ops = {
SET_RUNTIME_PM_OPS(ov2685_runtime_suspend,
ov2685_runtime_resume, NULL)
};
static int ov2685_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov2685 *ov2685 = container_of(ctrl->handler,
struct ov2685, ctrl_handler);
struct i2c_client *client = ov2685->client;
s64 max_expo;
int ret;
switch (ctrl->id) {
case V4L2_CID_VBLANK:
max_expo = ov2685->cur_mode->height + ctrl->val - 4;
__v4l2_ctrl_modify_range(ov2685->exposure,
ov2685->exposure->minimum, max_expo,
ov2685->exposure->step,
ov2685->exposure->default_value);
break;
}
if (!pm_runtime_get_if_in_use(&client->dev))
return 0;
switch (ctrl->id) {
case V4L2_CID_EXPOSURE:
ret = ov2685_write_reg(ov2685->client, OV2685_REG_EXPOSURE,
OV2685_REG_VALUE_24BIT, ctrl->val << 4);
break;
case V4L2_CID_ANALOGUE_GAIN:
ret = ov2685_write_reg(ov2685->client, OV2685_REG_GAIN,
OV2685_REG_VALUE_16BIT, ctrl->val);
break;
case V4L2_CID_VBLANK:
ret = ov2685_write_reg(ov2685->client, OV2685_REG_VTS,
OV2685_REG_VALUE_16BIT,
ctrl->val + ov2685->cur_mode->height);
break;
case V4L2_CID_TEST_PATTERN:
ret = ov2685_write_reg(ov2685->client, OV2685_REG_TEST_PATTERN,
OV2685_REG_VALUE_08BIT,
ov2685_test_pattern_val[ctrl->val]);
break;
default:
dev_warn(&client->dev, "%s Unhandled id:0x%x, val:0x%x\n",
__func__, ctrl->id, ctrl->val);
ret = -EINVAL;
break;
}
pm_runtime_put(&client->dev);
return ret;
}
static const struct v4l2_subdev_video_ops ov2685_video_ops = {
.s_stream = ov2685_s_stream,
};
static const struct v4l2_subdev_pad_ops ov2685_pad_ops = {
.enum_mbus_code = ov2685_enum_mbus_code,
.enum_frame_size = ov2685_enum_frame_sizes,
.get_fmt = ov2685_get_fmt,
.set_fmt = ov2685_set_fmt,
.get_selection = ov2685_get_selection,
.set_selection = ov2685_get_selection,
};
static const struct v4l2_subdev_ops ov2685_subdev_ops = {
.video = &ov2685_video_ops,
.pad = &ov2685_pad_ops,
};
static const struct v4l2_subdev_internal_ops ov2685_internal_ops = {
.open = ov2685_open,
};
static const struct v4l2_ctrl_ops ov2685_ctrl_ops = {
.s_ctrl = ov2685_set_ctrl,
};
static int ov2685_initialize_controls(struct ov2685 *ov2685)
{
const struct ov2685_mode *mode;
struct v4l2_ctrl_handler *handler;
struct v4l2_ctrl *ctrl;
struct v4l2_fwnode_device_properties props;
u64 exposure_max;
u32 pixel_rate, h_blank;
int ret;
handler = &ov2685->ctrl_handler;
mode = ov2685->cur_mode;
ret = v4l2_ctrl_handler_init(handler, 10);
if (ret)
return ret;
handler->lock = &ov2685->mutex;
ctrl = v4l2_ctrl_new_int_menu(handler, NULL, V4L2_CID_LINK_FREQ,
0, 0, link_freq_menu_items);
if (ctrl)
ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
pixel_rate = (link_freq_menu_items[0] * 2 * OV2685_LANES) /
OV2685_BITS_PER_SAMPLE;
v4l2_ctrl_new_std(handler, NULL, V4L2_CID_PIXEL_RATE,
0, pixel_rate, 1, pixel_rate);
h_blank = mode->hts_def - mode->width;
ov2685->hblank = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK,
h_blank, h_blank, 1, h_blank);
if (ov2685->hblank)
ov2685->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
ov2685->vblank = v4l2_ctrl_new_std(handler, &ov2685_ctrl_ops,
V4L2_CID_VBLANK, mode->vts_def - mode->height,
OV2685_VTS_MAX - mode->height, 1,
mode->vts_def - mode->height);
exposure_max = mode->vts_def - 4;
ov2685->exposure = v4l2_ctrl_new_std(handler, &ov2685_ctrl_ops,
V4L2_CID_EXPOSURE, OV2685_EXPOSURE_MIN,
exposure_max, OV2685_EXPOSURE_STEP,
mode->exp_def);
ov2685->anal_gain = v4l2_ctrl_new_std(handler, &ov2685_ctrl_ops,
V4L2_CID_ANALOGUE_GAIN, OV2685_GAIN_MIN,
OV2685_GAIN_MAX, OV2685_GAIN_STEP,
OV2685_GAIN_DEFAULT);
ov2685->test_pattern = v4l2_ctrl_new_std_menu_items(handler,
&ov2685_ctrl_ops, V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(ov2685_test_pattern_menu) - 1,
0, 0, ov2685_test_pattern_menu);
ret = v4l2_fwnode_device_parse(&ov2685->client->dev, &props);
if (ret)
goto err_free_handler;
ret = v4l2_ctrl_new_fwnode_properties(handler, &ov2685_ctrl_ops, &props);
if (ret)
goto err_free_handler;
if (handler->error) {
ret = handler->error;
dev_err(&ov2685->client->dev,
"Failed to init controls(%d)\n", ret);
goto err_free_handler;
}
ov2685->subdev.ctrl_handler = handler;
return 0;
err_free_handler:
v4l2_ctrl_handler_free(handler);
return ret;
}
static int ov2685_check_sensor_id(struct ov2685 *ov2685,
struct i2c_client *client)
{
struct device *dev = &ov2685->client->dev;
int ret;
u32 id = 0;
ret = ov2685_read_reg(client, OV2685_REG_CHIP_ID,
OV2685_REG_VALUE_16BIT, &id);
if (id != CHIP_ID) {
dev_err(dev, "Unexpected sensor id(%04x), ret(%d)\n", id, ret);
return ret;
}
dev_info(dev, "Detected OV%04x sensor\n", CHIP_ID);
return 0;
}
static int ov2685_configure_regulators(struct ov2685 *ov2685)
{
int i;
for (i = 0; i < OV2685_NUM_SUPPLIES; i++)
ov2685->supplies[i].supply = ov2685_supply_names[i];
return devm_regulator_bulk_get(&ov2685->client->dev,
OV2685_NUM_SUPPLIES,
ov2685->supplies);
}
static int ov2685_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct ov2685 *ov2685;
int ret;
ov2685 = devm_kzalloc(dev, sizeof(*ov2685), GFP_KERNEL);
if (!ov2685)
return -ENOMEM;
ov2685->client = client;
ov2685->cur_mode = &supported_modes[0];
ov2685->xvclk = devm_v4l2_sensor_clk_get_legacy(dev, "xvclk", true,
OV2685_XVCLK_FREQ);
if (IS_ERR(ov2685->xvclk))
return dev_err_probe(dev, PTR_ERR(ov2685->xvclk),
"Failed to get xvclk\n");
if (clk_get_rate(ov2685->xvclk) != OV2685_XVCLK_FREQ)
dev_warn(dev, "xvclk mismatched, modes are based on 24MHz\n");
ov2685->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(ov2685->reset_gpio)) {
dev_err(dev, "Failed to get reset-gpios\n");
return -EINVAL;
}
ret = ov2685_configure_regulators(ov2685);
if (ret) {
dev_err(dev, "Failed to get power regulators\n");
return ret;
}
mutex_init(&ov2685->mutex);
v4l2_i2c_subdev_init(&ov2685->subdev, client, &ov2685_subdev_ops);
ret = ov2685_initialize_controls(ov2685);
if (ret)
goto err_destroy_mutex;
ret = __ov2685_power_on(ov2685);
if (ret)
goto err_free_handler;
ret = ov2685_check_sensor_id(ov2685, client);
if (ret)
goto err_power_off;
ov2685->subdev.internal_ops = &ov2685_internal_ops;
ov2685->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
ov2685->pad.flags = MEDIA_PAD_FL_SOURCE;
ov2685->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR;
ret = media_entity_pads_init(&ov2685->subdev.entity, 1, &ov2685->pad);
if (ret < 0)
goto err_power_off;
ret = v4l2_async_register_subdev(&ov2685->subdev);
if (ret) {
dev_err(dev, "v4l2 async register subdev failed\n");
goto err_clean_entity;
}
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
pm_runtime_idle(dev);
return 0;
err_clean_entity:
media_entity_cleanup(&ov2685->subdev.entity);
err_power_off:
__ov2685_power_off(ov2685);
err_free_handler:
v4l2_ctrl_handler_free(&ov2685->ctrl_handler);
err_destroy_mutex:
mutex_destroy(&ov2685->mutex);
return ret;
}
static void ov2685_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov2685 *ov2685 = to_ov2685(sd);
v4l2_async_unregister_subdev(sd);
media_entity_cleanup(&sd->entity);
v4l2_ctrl_handler_free(&ov2685->ctrl_handler);
mutex_destroy(&ov2685->mutex);
pm_runtime_disable(&client->dev);
if (!pm_runtime_status_suspended(&client->dev))
__ov2685_power_off(ov2685);
pm_runtime_set_suspended(&client->dev);
}
#if IS_ENABLED(CONFIG_OF)
static const struct of_device_id ov2685_of_match[] = {
{ .compatible = "ovti,ov2685" },
{},
};
MODULE_DEVICE_TABLE(of, ov2685_of_match);
#endif
static struct i2c_driver ov2685_i2c_driver = {
.driver = {
.name = "ov2685",
.pm = &ov2685_pm_ops,
.of_match_table = of_match_ptr(ov2685_of_match),
},
.probe = ov2685_probe,
.remove = ov2685_remove,
};
module_i2c_driver(ov2685_i2c_driver);
MODULE_DESCRIPTION("OmniVision ov2685 sensor driver");
MODULE_LICENSE("GPL v2");
