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    Subject[PATCH v7 2/2] media: i2c: Add the ov7740 image sensor driver
    Date
    The ov7740 (color) image sensor is a high performance VGA CMOS
    image snesor, which supports for output formats: RAW RGB and YUV
    and image sizes: VGA, and QVGA, CIF and any size smaller.

    Signed-off-by: Songjun Wu <songjun.wu@microchip.com>
    Signed-off-by: Wenyou Yang <wenyou.yang@microchip.com>
    ---

    Changes in v7:
    - Fix the wrong handle of default register configuration.
    - Add the missed assignment of ov7740->frmsize.

    Changes in v6:
    - Remove unnecessary #include <linux/init>.
    - Remove unnecessary comments and extra newline.
    - Add const for some structures.
    - Add the check of the return value from regmap_write().
    - Simplify the calling of __v4l2_ctrl_handler_setup().
    - Add the default format initialization function.
    - Integrate the set_power() and enable/disable the clock into
    one function.

    Changes in v5:
    - Squash the driver and MAINTAINERS entry patches to one.
    - Precede the driver patch with the bindings patch.

    Changes in v4:
    - Assign 'val' a initial value to avoid warning: 'val' may be
    used uninitialized.
    - Rename REG_REG15 to avoid warning: "REG_REG15" redefined.

    Changes in v3:
    - Put the MAINTAINERS change to a separate patch.

    Changes in v2:
    - Split off the bindings into a separate patch.
    - Add a new entry to the MAINTAINERS file.

    MAINTAINERS | 8 +
    drivers/media/i2c/Kconfig | 8 +
    drivers/media/i2c/Makefile | 1 +
    drivers/media/i2c/ov7740.c | 1234 ++++++++++++++++++++++++++++++++++++++++++++
    4 files changed, 1251 insertions(+)
    create mode 100644 drivers/media/i2c/ov7740.c

    diff --git a/MAINTAINERS b/MAINTAINERS
    index 7a52a66aa991..1de965009b13 100644
    --- a/MAINTAINERS
    +++ b/MAINTAINERS
    @@ -10053,6 +10053,14 @@ S: Maintained
    F: drivers/media/i2c/ov7670.c
    F: Documentation/devicetree/bindings/media/i2c/ov7670.txt

    +OMNIVISION OV7740 SENSOR DRIVER
    +M: Wenyou Yang <wenyou.yang@microchip.com>
    +L: linux-media@vger.kernel.org
    +T: git git://linuxtv.org/media_tree.git
    +S: Maintained
    +F: drivers/media/i2c/ov7740.c
    +F: Documentation/devicetree/bindings/media/i2c/ov7740.txt
    +
    ONENAND FLASH DRIVER
    M: Kyungmin Park <kyungmin.park@samsung.com>
    L: linux-mtd@lists.infradead.org
    diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
    index cb5d7ff82915..00b1c4c031d4 100644
    --- a/drivers/media/i2c/Kconfig
    +++ b/drivers/media/i2c/Kconfig
    @@ -665,6 +665,14 @@ config VIDEO_OV7670
    OV7670 VGA camera. It currently only works with the M88ALP01
    controller.

    +config VIDEO_OV7740
    + tristate "OmniVision OV7740 sensor support"
    + depends on I2C && VIDEO_V4L2
    + depends on MEDIA_CAMERA_SUPPORT
    + ---help---
    + This is a Video4Linux2 sensor-level driver for the OmniVision
    + OV7740 VGA camera sensor.
    +
    config VIDEO_OV9650
    tristate "OmniVision OV9650/OV9652 sensor support"
    depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
    diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
    index 548a9efce966..9b19ec7fcaf4 100644
    --- a/drivers/media/i2c/Makefile
    +++ b/drivers/media/i2c/Makefile
    @@ -68,6 +68,7 @@ obj-$(CONFIG_VIDEO_OV5670) += ov5670.o
    obj-$(CONFIG_VIDEO_OV6650) += ov6650.o
    obj-$(CONFIG_VIDEO_OV7640) += ov7640.o
    obj-$(CONFIG_VIDEO_OV7670) += ov7670.o
    +obj-$(CONFIG_VIDEO_OV7740) += ov7740.o
    obj-$(CONFIG_VIDEO_OV9650) += ov9650.o
    obj-$(CONFIG_VIDEO_OV13858) += ov13858.o
    obj-$(CONFIG_VIDEO_MT9M032) += mt9m032.o
    diff --git a/drivers/media/i2c/ov7740.c b/drivers/media/i2c/ov7740.c
    new file mode 100644
    index 000000000000..26b56a627377
    --- /dev/null
    +++ b/drivers/media/i2c/ov7740.c
    @@ -0,0 +1,1234 @@
    +/*
    + * Copyright (c) 2017 Microchip Corporation.
    + *
    + * This program is free software; you can redistribute it and/or
    + * modify it under the terms of the GNU General Public License version
    + * 2 as published by the Free Software Foundation.
    + *
    + * This program is distributed in the hope that it will be useful,
    + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    + * GNU General Public License for more details.
    + *
    + */
    +#include <linux/clk.h>
    +#include <linux/delay.h>
    +#include <linux/gpio.h>
    +#include <linux/i2c.h>
    +#include <linux/module.h>
    +#include <linux/pm_runtime.h>
    +#include <linux/regmap.h>
    +#include <media/v4l2-ctrls.h>
    +#include <media/v4l2-event.h>
    +#include <media/v4l2-image-sizes.h>
    +#include <media/v4l2-subdev.h>
    +
    +#define REG_OUTSIZE_LSB 0x34
    +
    +/* OV7740 register tables */
    +#define REG_GAIN 0x00 /* Gain lower 8 bits (rest in vref) */
    +#define REG_BGAIN 0x01 /* blue gain */
    +#define REG_RGAIN 0x02 /* red gain */
    +#define REG_GGAIN 0x03 /* green gain */
    +#define REG_REG04 0x04 /* analog setting, dont change*/
    +#define REG_BAVG 0x05 /* b channel average */
    +#define REG_GAVG 0x06 /* g channel average */
    +#define REG_RAVG 0x07 /* r channel average */
    +
    +#define REG_REG0C 0x0C /* filp enable */
    +#define REG0C_IMG_FLIP 0x80
    +#define REG0C_IMG_MIRROR 0x40
    +
    +#define REG_REG0E 0x0E /* blc line */
    +#define REG_HAEC 0x0F /* auto exposure cntrl */
    +#define REG_AEC 0x10 /* auto exposure cntrl */
    +
    +#define REG_CLK 0x11 /* Clock control */
    +#define REG_REG55 0x55 /* Clock PLL DIV/PreDiv */
    +
    +#define REG_REG12 0x12
    +
    +#define REG_REG13 0x13 /* auto/manual AGC, AEC, Write Balance*/
    +#define REG13_AEC_EN 0x01
    +#define REG13_AGC_EN 0x04
    +
    +#define REG_REG14 0x14
    +#define REG_CTRL15 0x15
    +#define REG15_GAIN_MSB 0x03
    +
    +#define REG_REG16 0x16
    +
    +#define REG_MIDH 0x1C /* manufacture id byte */
    +#define REG_MIDL 0x1D /* manufacture id byre */
    +#define REG_PIDH 0x0A /* Product ID MSB */
    +#define REG_PIDL 0x0B /* Product ID LSB */
    +
    +#define REG_84 0x84 /* lots of stuff */
    +#define REG_REG38 0x38 /* sub-addr */
    +
    +#define REG_AHSTART 0x17 /* Horiz start high bits */
    +#define REG_AHSIZE 0x18
    +#define REG_AVSTART 0x19 /* Vert start high bits */
    +#define REG_AVSIZE 0x1A
    +#define REG_PSHFT 0x1b /* Pixel delay after HREF */
    +
    +#define REG_HOUTSIZE 0x31
    +#define REG_VOUTSIZE 0x32
    +#define REG_HVSIZEOFF 0x33
    +#define REG_REG34 0x34 /* DSP output size H/V LSB*/
    +
    +#define REG_ISP_CTRL00 0x80
    +#define ISPCTRL00_AWB_EN 0x10
    +#define ISPCTRL00_AWB_GAIN_EN 0x04
    +
    +#define REG_YGAIN 0xE2 /* ygain for contrast control */
    +
    +#define REG_YBRIGHT 0xE3
    +#define REG_SGNSET 0xE4
    +#define SGNSET_YBRIGHT_MASK 0x08
    +
    +#define REG_USAT 0xDD
    +#define REG_VSAT 0xDE
    +
    +
    +struct ov7740 {
    + struct v4l2_subdev subdev;
    +#if defined(CONFIG_MEDIA_CONTROLLER)
    + struct media_pad pad;
    +#endif
    + struct v4l2_mbus_framefmt format;
    + const struct ov7740_pixfmt *fmt; /* Current format */
    + const struct ov7740_framesize *frmsize;
    + struct regmap *regmap;
    + struct clk *xvclk;
    + struct v4l2_ctrl_handler ctrl_handler;
    + struct {
    + /* gain cluster */
    + struct v4l2_ctrl *auto_gain;
    + struct v4l2_ctrl *gain;
    + };
    + struct {
    + struct v4l2_ctrl *auto_wb;
    + struct v4l2_ctrl *blue_balance;
    + struct v4l2_ctrl *red_balance;
    + };
    + struct {
    + struct v4l2_ctrl *hflip;
    + struct v4l2_ctrl *vflip;
    + };
    + struct {
    + /* exposure cluster */
    + struct v4l2_ctrl *auto_exposure;
    + struct v4l2_ctrl *exposure;
    + };
    + struct {
    + /* saturation/hue cluster */
    + struct v4l2_ctrl *saturation;
    + struct v4l2_ctrl *hue;
    + };
    + struct v4l2_ctrl *brightness;
    + struct v4l2_ctrl *contrast;
    +
    + struct mutex mutex; /* To serialize asynchronus callbacks */
    + bool streaming; /* Streaming on/off */
    +
    + struct gpio_desc *resetb_gpio;
    + struct gpio_desc *pwdn_gpio;
    +};
    +
    +struct ov7740_pixfmt {
    + u32 mbus_code;
    + enum v4l2_colorspace colorspace;
    + const struct reg_sequence *regs;
    + u32 reg_num;
    +};
    +
    +struct ov7740_framesize {
    + u16 width;
    + u16 height;
    + const struct reg_sequence *regs;
    + u32 reg_num;
    +};
    +
    +static const struct reg_sequence ov7740_vga[] = {
    + {0x55, 0x40},
    + {0x11, 0x02},
    +
    + {0xd5, 0x10},
    + {0x0c, 0x12},
    + {0x0d, 0x34},
    + {0x17, 0x25},
    + {0x18, 0xa0},
    + {0x19, 0x03},
    + {0x1a, 0xf0},
    + {0x1b, 0x89},
    + {0x22, 0x03},
    + {0x29, 0x18},
    + {0x2b, 0xf8},
    + {0x2c, 0x01},
    + {REG_HOUTSIZE, 0xa0},
    + {REG_VOUTSIZE, 0xf0},
    + {0x33, 0xc4},
    + {REG_OUTSIZE_LSB, 0x0},
    + {0x35, 0x05},
    + {0x04, 0x60},
    + {0x27, 0x80},
    + {0x3d, 0x0f},
    + {0x3e, 0x80},
    + {0x3f, 0x40},
    + {0x40, 0x7f},
    + {0x41, 0x6a},
    + {0x42, 0x29},
    + {0x44, 0x22},
    + {0x45, 0x41},
    + {0x47, 0x02},
    + {0x49, 0x64},
    + {0x4a, 0xa1},
    + {0x4b, 0x40},
    + {0x4c, 0x1a},
    + {0x4d, 0x50},
    + {0x4e, 0x13},
    + {0x64, 0x00},
    + {0x67, 0x88},
    + {0x68, 0x1a},
    +
    + {0x14, 0x28},
    + {0x24, 0x3c},
    + {0x25, 0x30},
    + {0x26, 0x72},
    + {0x50, 0x97},
    + {0x51, 0x1f},
    + {0x52, 0x00},
    + {0x53, 0x00},
    + {0x20, 0x00},
    + {0x21, 0xcf},
    + {0x50, 0x4b},
    + {0x38, 0x14},
    + {0xe9, 0x00},
    + {0x56, 0x55},
    + {0x57, 0xff},
    + {0x58, 0xff},
    + {0x59, 0xff},
    + {0x5f, 0x04},
    + {0xec, 0x00},
    + {0x13, 0xff},
    +
    + {0x81, 0x3f},
    + {0x82, 0x32},
    + {0x38, 0x11},
    + {0x84, 0x70},
    + {0x85, 0x00},
    + {0x86, 0x03},
    + {0x87, 0x01},
    + {0x88, 0x05},
    + {0x89, 0x30},
    + {0x8d, 0x30},
    + {0x8f, 0x85},
    + {0x93, 0x30},
    + {0x95, 0x85},
    + {0x99, 0x30},
    + {0x9b, 0x85},
    +
    + {0x9c, 0x08},
    + {0x9d, 0x12},
    + {0x9e, 0x23},
    + {0x9f, 0x45},
    + {0xa0, 0x55},
    + {0xa1, 0x64},
    + {0xa2, 0x72},
    + {0xa3, 0x7f},
    + {0xa4, 0x8b},
    + {0xa5, 0x95},
    + {0xa6, 0xa7},
    + {0xa7, 0xb5},
    + {0xa8, 0xcb},
    + {0xa9, 0xdd},
    + {0xaa, 0xec},
    + {0xab, 0x1a},
    +
    + {0xce, 0x78},
    + {0xcf, 0x6e},
    + {0xd0, 0x0a},
    + {0xd1, 0x0c},
    + {0xd2, 0x84},
    + {0xd3, 0x90},
    + {0xd4, 0x1e},
    +
    + {0x5a, 0x24},
    + {0x5b, 0x1f},
    + {0x5c, 0x88},
    + {0x5d, 0x60},
    +
    + {0xac, 0x6e},
    + {0xbe, 0xff},
    + {0xbf, 0x00},
    +
    + {0x0f, 0x1d},
    + {0x0f, 0x1f},
    +};
    +
    +static const struct ov7740_framesize ov7740_framesizes[] = {
    + {
    + .width = VGA_WIDTH,
    + .height = VGA_HEIGHT,
    + .regs = ov7740_vga,
    + .reg_num = ARRAY_SIZE(ov7740_vga),
    + },
    +};
    +
    +#ifdef CONFIG_VIDEO_ADV_DEBUG
    +static int ov7740_get_register(struct v4l2_subdev *sd,
    + struct v4l2_dbg_register *reg)
    +{
    + struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
    + struct regmap *regmap = ov7740->regmap;
    + unsigned int val = 0;
    + int ret;
    +
    + ret = regmap_read(regmap, reg->reg & 0xff, &val);
    + reg->val = val;
    + reg->size = 1;
    +
    + return 0;
    +}
    +
    +static int ov7740_set_register(struct v4l2_subdev *sd,
    + const struct v4l2_dbg_register *reg)
    +{
    + struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
    + struct regmap *regmap = ov7740->regmap;
    +
    + regmap_write(regmap, reg->reg & 0xff, reg->val & 0xff);
    +
    + return 0;
    +}
    +#endif
    +
    +static int ov7740_set_power(struct ov7740 *ov7740, int on)
    +{
    + int ret;
    +
    + if (on) {
    + ret = clk_prepare_enable(ov7740->xvclk);
    + if (ret)
    + return ret;
    +
    + if (ov7740->pwdn_gpio)
    + gpiod_direction_output(ov7740->pwdn_gpio, 0);
    +
    + if (ov7740->resetb_gpio) {
    + gpiod_set_value(ov7740->resetb_gpio, 1);
    + usleep_range(500, 1000);
    + gpiod_set_value(ov7740->resetb_gpio, 0);
    + usleep_range(3000, 5000);
    + }
    + } else {
    + clk_disable_unprepare(ov7740->xvclk);
    +
    + if (ov7740->pwdn_gpio)
    + gpiod_direction_output(ov7740->pwdn_gpio, 0);
    + }
    +
    + return 0;
    +}
    +
    +static struct v4l2_subdev_core_ops ov7740_subdev_core_ops = {
    + .log_status = v4l2_ctrl_subdev_log_status,
    +#ifdef CONFIG_VIDEO_ADV_DEBUG
    + .g_register = ov7740_get_register,
    + .s_register = ov7740_set_register,
    +#endif
    + .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
    + .unsubscribe_event = v4l2_event_subdev_unsubscribe,
    +};
    +
    +static int ov7740_set_white_balance(struct ov7740 *ov7740, int awb)
    +{
    + struct regmap *regmap = ov7740->regmap;
    + unsigned int value;
    + int ret;
    +
    + ret = regmap_read(regmap, REG_ISP_CTRL00, &value);
    + if (!ret) {
    + if (awb)
    + value |= (ISPCTRL00_AWB_EN | ISPCTRL00_AWB_GAIN_EN);
    + else
    + value &= ~(ISPCTRL00_AWB_EN | ISPCTRL00_AWB_GAIN_EN);
    + ret = regmap_write(regmap, REG_ISP_CTRL00, value);
    + if (ret)
    + return ret;
    + }
    +
    + if (!awb) {
    + ret = regmap_write(regmap, REG_BGAIN,
    + ov7740->blue_balance->val);
    + if (ret)
    + return ret;
    +
    + ret = regmap_write(regmap, REG_RGAIN, ov7740->red_balance->val);
    + if (ret)
    + return ret;
    + }
    +
    + return 0;
    +}
    +
    +static int ov7740_set_saturation(struct regmap *regmap, int value)
    +{
    + int ret;
    +
    + ret = regmap_write(regmap, REG_USAT, (unsigned char)value);
    + if (ret)
    + return ret;
    +
    + return regmap_write(regmap, REG_VSAT, (unsigned char)value);
    +}
    +
    +static int ov7740_set_gain(struct regmap *regmap, int value)
    +{
    + int ret;
    +
    + ret = regmap_write(regmap, REG_GAIN, value & 0xff);
    + if (ret)
    + return ret;
    +
    + ret = regmap_update_bits(regmap, REG_CTRL15,
    + REG15_GAIN_MSB, (value >> 8) & 0x3);
    + if (!ret)
    + ret = regmap_update_bits(regmap, REG_REG13, REG13_AGC_EN, 0);
    +
    + return ret;
    +}
    +
    +static int ov7740_set_autogain(struct regmap *regmap, int value)
    +{
    + unsigned int reg;
    + int ret;
    +
    + ret = regmap_read(regmap, REG_REG13, &reg);
    + if (ret)
    + return ret;
    + if (value)
    + reg |= REG13_AGC_EN;
    + else
    + reg &= ~REG13_AGC_EN;
    + return regmap_write(regmap, REG_REG13, reg);
    +}
    +
    +static int ov7740_set_brightness(struct regmap *regmap, int value)
    +{
    + /* Turn off AEC/AGC */
    + regmap_update_bits(regmap, REG_REG13, REG13_AEC_EN, 0);
    + regmap_update_bits(regmap, REG_REG13, REG13_AGC_EN, 0);
    +
    + if (value >= 0) {
    + regmap_write(regmap, REG_YBRIGHT, (unsigned char)value);
    + regmap_update_bits(regmap, REG_SGNSET, SGNSET_YBRIGHT_MASK, 0);
    + } else{
    + regmap_write(regmap, REG_YBRIGHT, (unsigned char)(-value));
    + regmap_update_bits(regmap, REG_SGNSET, SGNSET_YBRIGHT_MASK, 1);
    + }
    +
    + return 0;
    +}
    +
    +static int ov7740_set_contrast(struct regmap *regmap, int value)
    +{
    + return regmap_write(regmap, REG_YGAIN, (unsigned char)value);
    +}
    +
    +static int ov7740_get_gain(struct ov7740 *ov7740, struct v4l2_ctrl *ctrl)
    +{
    + struct regmap *regmap = ov7740->regmap;
    + unsigned int value0, value1;
    + int ret;
    +
    + if (!ctrl->val)
    + return 0;
    +
    + ret = regmap_read(regmap, REG_GAIN, &value0);
    + if (ret)
    + return ret;
    + ret = regmap_read(regmap, REG_CTRL15, &value1);
    + if (ret)
    + return ret;
    +
    + ov7740->gain->val = (value1 << 8) | (value0 & 0xff);
    +
    + return 0;
    +}
    +
    +static int ov7740_set_exp(struct regmap *regmap, int value)
    +{
    + int ret;
    +
    + /* Turn off AEC/AGC */
    + ret = regmap_update_bits(regmap, REG_REG13,
    + REG13_AEC_EN | REG13_AGC_EN, 0);
    + if (ret)
    + return ret;
    +
    + ret = regmap_write(regmap, REG_AEC, (unsigned char)value);
    + if (ret)
    + return ret;
    +
    + return regmap_write(regmap, REG_HAEC, (unsigned char)(value >> 8));
    +}
    +
    +static int ov7740_set_autoexp(struct regmap *regmap,
    + enum v4l2_exposure_auto_type value)
    +{
    + unsigned int reg;
    + int ret;
    +
    + ret = regmap_read(regmap, REG_REG13, &reg);
    + if (!ret) {
    + if (value == V4L2_EXPOSURE_AUTO)
    + reg |= (REG13_AEC_EN | REG13_AGC_EN);
    + else
    + reg &= ~(REG13_AEC_EN | REG13_AGC_EN);
    + ret = regmap_write(regmap, REG_REG13, reg);
    + }
    +
    + return ret;
    +}
    +
    +
    +static int ov7740_get_volatile_ctrl(struct v4l2_ctrl *ctrl)
    +{
    + struct ov7740 *ov7740 = container_of(ctrl->handler,
    + struct ov7740, ctrl_handler);
    + int ret;
    +
    + switch (ctrl->id) {
    + case V4L2_CID_AUTOGAIN:
    + ret = ov7740_get_gain(ov7740, ctrl);
    + break;
    + default:
    + ret = -EINVAL;
    + break;
    + }
    + return ret;
    +}
    +
    +static int ov7740_set_ctrl(struct v4l2_ctrl *ctrl)
    +{
    + struct ov7740 *ov7740 = container_of(ctrl->handler,
    + struct ov7740, ctrl_handler);
    + struct i2c_client *client = v4l2_get_subdevdata(&ov7740->subdev);
    + struct regmap *regmap = ov7740->regmap;
    + int ret;
    + u8 val = 0;
    +
    + if (pm_runtime_get_if_in_use(&client->dev) <= 0)
    + return 0;
    +
    + switch (ctrl->id) {
    + case V4L2_CID_AUTO_WHITE_BALANCE:
    + ret = ov7740_set_white_balance(ov7740, ctrl->val);
    + break;
    + case V4L2_CID_SATURATION:
    + ret = ov7740_set_saturation(regmap, ctrl->val);
    + break;
    + case V4L2_CID_BRIGHTNESS:
    + ret = ov7740_set_brightness(regmap, ctrl->val);
    + break;
    + case V4L2_CID_CONTRAST:
    + ret = ov7740_set_contrast(regmap, ctrl->val);
    + break;
    + case V4L2_CID_VFLIP:
    + ret = regmap_update_bits(regmap, REG_REG0C,
    + REG0C_IMG_FLIP, val);
    + break;
    + case V4L2_CID_HFLIP:
    + val = ctrl->val ? REG0C_IMG_MIRROR : 0x00;
    + ret = regmap_update_bits(regmap, REG_REG0C,
    + REG0C_IMG_MIRROR, val);
    + break;
    + case V4L2_CID_AUTOGAIN:
    + if (!ctrl->val)
    + return ov7740_set_gain(regmap, ov7740->gain->val);
    +
    + ret = ov7740_set_autogain(regmap, ctrl->val);
    + break;
    +
    + case V4L2_CID_EXPOSURE_AUTO:
    + if (ctrl->val == V4L2_EXPOSURE_MANUAL)
    + return ov7740_set_exp(regmap, ov7740->exposure->val);
    +
    + ret = ov7740_set_autoexp(regmap, ctrl->val);
    + break;
    + default:
    + ret = -EINVAL;
    + break;
    + }
    +
    + pm_runtime_put(&client->dev);
    +
    + return ret;
    +}
    +
    +static const struct v4l2_ctrl_ops ov7740_ctrl_ops = {
    + .g_volatile_ctrl = ov7740_get_volatile_ctrl,
    + .s_ctrl = ov7740_set_ctrl,
    +};
    +
    +static int ov7740_start_streaming(struct ov7740 *ov7740)
    +{
    + int ret;
    +
    + if (ov7740->fmt) {
    + ret = regmap_multi_reg_write(ov7740->regmap,
    + ov7740->fmt->regs,
    + ov7740->fmt->reg_num);
    + if (ret)
    + return ret;
    + }
    +
    + if (ov7740->frmsize) {
    + ret = regmap_multi_reg_write(ov7740->regmap,
    + ov7740->frmsize->regs,
    + ov7740->frmsize->reg_num);
    + if (ret)
    + return ret;
    + }
    +
    + return __v4l2_ctrl_handler_setup(ov7740->subdev.ctrl_handler);
    +}
    +
    +static int ov7740_set_stream(struct v4l2_subdev *sd, int enable)
    +{
    + struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
    + struct i2c_client *client = v4l2_get_subdevdata(sd);
    + int ret = 0;
    +
    + mutex_lock(&ov7740->mutex);
    + if (ov7740->streaming == enable) {
    + mutex_unlock(&ov7740->mutex);
    + return 0;
    + }
    +
    + if (enable) {
    + ret = pm_runtime_get_sync(&client->dev);
    + if (ret < 0) {
    + pm_runtime_put_noidle(&client->dev);
    + goto err_unlock;
    + }
    +
    + ret = ov7740_start_streaming(ov7740);
    + if (ret)
    + goto err_rpm_put;
    + } else {
    + pm_runtime_put(&client->dev);
    + }
    +
    + ov7740->streaming = enable;
    +
    + mutex_unlock(&ov7740->mutex);
    + return ret;
    +
    +err_rpm_put:
    + pm_runtime_put(&client->dev);
    +err_unlock:
    + mutex_unlock(&ov7740->mutex);
    + return ret;
    +}
    +
    +static int ov7740_get_parm(struct v4l2_subdev *sd,
    + struct v4l2_streamparm *parms)
    +{
    + struct v4l2_captureparm *cp = &parms->parm.capture;
    + struct v4l2_fract *tpf = &cp->timeperframe;
    +
    + if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
    + return -EINVAL;
    +
    + memset(cp, 0, sizeof(struct v4l2_captureparm));
    + cp->capability = V4L2_CAP_TIMEPERFRAME;
    +
    + tpf->numerator = 1;
    + tpf->denominator = 60;
    +
    + return 0;
    +}
    +
    +static int ov7740_set_parm(struct v4l2_subdev *sd,
    + struct v4l2_streamparm *parms)
    +{
    + struct v4l2_captureparm *cp = &parms->parm.capture;
    + struct v4l2_fract *tpf = &cp->timeperframe;
    +
    + if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
    + return -EINVAL;
    + if (cp->extendedmode != 0)
    + return -EINVAL;
    +
    + cp->capability = V4L2_CAP_TIMEPERFRAME;
    +
    + tpf->numerator = 1;
    + tpf->denominator = 60;
    +
    + return 0;
    +}
    +
    +static struct v4l2_subdev_video_ops ov7740_subdev_video_ops = {
    + .s_stream = ov7740_set_stream,
    + .s_parm = ov7740_set_parm,
    + .g_parm = ov7740_get_parm,
    +};
    +
    +static const struct reg_sequence ov7740_format_yuyv[] = {
    + {0x12, 0x00},
    + {0x36, 0x3f},
    + {0x80, 0x7f},
    + {0x83, 0x01},
    +};
    +
    +static const struct reg_sequence ov7740_format_bggr8[] = {
    + {0x36, 0x2f},
    + {0x80, 0x01},
    + {0x83, 0x04},
    +};
    +
    +static const struct ov7740_pixfmt ov7740_formats[] = {
    + {
    + .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
    + .colorspace = V4L2_COLORSPACE_SRGB,
    + .regs = ov7740_format_yuyv,
    + .reg_num = ARRAY_SIZE(ov7740_format_yuyv),
    + },
    + {
    + .mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8,
    + .colorspace = V4L2_COLORSPACE_SRGB,
    + .regs = ov7740_format_bggr8,
    + .reg_num = ARRAY_SIZE(ov7740_format_bggr8),
    + }
    +};
    +#define N_OV7740_FMTS ARRAY_SIZE(ov7740_formats)
    +
    +static int ov7740_enum_mbus_code(struct v4l2_subdev *sd,
    + struct v4l2_subdev_pad_config *cfg,
    + struct v4l2_subdev_mbus_code_enum *code)
    +{
    + if (code->pad || code->index >= N_OV7740_FMTS)
    + return -EINVAL;
    +
    + code->code = ov7740_formats[code->index].mbus_code;
    +
    + return 0;
    +}
    +
    +static int ov7740_enum_frame_interval(struct v4l2_subdev *sd,
    + struct v4l2_subdev_pad_config *cfg,
    + struct v4l2_subdev_frame_interval_enum *fie)
    +{
    + if (fie->pad)
    + return -EINVAL;
    +
    + if (fie->index >= 1)
    + return -EINVAL;
    +
    + if ((fie->width != VGA_WIDTH) || (fie->height != VGA_HEIGHT))
    + return -EINVAL;
    +
    + fie->interval.numerator = 1;
    + fie->interval.denominator = 60;
    +
    + return 0;
    +}
    +
    +static int ov7740_enum_frame_size(struct v4l2_subdev *sd,
    + struct v4l2_subdev_pad_config *cfg,
    + struct v4l2_subdev_frame_size_enum *fse)
    +{
    + if (fse->pad)
    + return -EINVAL;
    +
    + if (fse->index > 0)
    + return -EINVAL;
    +
    + fse->min_width = fse->max_width = VGA_WIDTH;
    + fse->min_height = fse->max_height = VGA_HEIGHT;
    +
    + return 0;
    +}
    +
    +static int ov7740_try_fmt_internal(struct v4l2_subdev *sd,
    + struct v4l2_mbus_framefmt *fmt,
    + const struct ov7740_pixfmt **ret_fmt,
    + const struct ov7740_framesize **ret_frmsize)
    +{
    + struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
    + const struct ov7740_framesize *fsize = &ov7740_framesizes[0];
    + int index, i;
    +
    + for (index = 0; index < N_OV7740_FMTS; index++) {
    + if (ov7740_formats[index].mbus_code == fmt->code)
    + break;
    + }
    + if (index >= N_OV7740_FMTS) {
    + /* default to first format */
    + index = 0;
    + fmt->code = ov7740_formats[0].mbus_code;
    + }
    + if (ret_fmt != NULL)
    + *ret_fmt = ov7740_formats + index;
    +
    + for (i = 0; i < ARRAY_SIZE(ov7740_framesizes); i++) {
    + if ((fsize->width >= fmt->width) &&
    + (fsize->height >= fmt->height)) {
    + fmt->width = fsize->width;
    + fmt->height = fsize->height;
    + break;
    + }
    +
    + fsize++;
    + }
    +
    + if (ret_frmsize != NULL)
    + *ret_frmsize = fsize;
    +
    + fmt->field = V4L2_FIELD_NONE;
    + fmt->colorspace = ov7740_formats[index].colorspace;
    +
    + ov7740->format = *fmt;
    +
    + return 0;
    +}
    +
    +static int ov7740_set_fmt(struct v4l2_subdev *sd,
    + struct v4l2_subdev_pad_config *cfg,
    + struct v4l2_subdev_format *format)
    +{
    + struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
    + const struct ov7740_pixfmt *ovfmt;
    + const struct ov7740_framesize *fsize;
    +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
    + struct v4l2_mbus_framefmt *mbus_fmt;
    +#endif
    + int ret;
    +
    + mutex_lock(&ov7740->mutex);
    + if (format->pad) {
    + ret = -EINVAL;
    + goto error;
    + }
    +
    + if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
    + ret = ov7740_try_fmt_internal(sd, &format->format, NULL, NULL);
    + if (ret)
    + goto error;
    +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
    + mbus_fmt = v4l2_subdev_get_try_format(sd, cfg, format->pad);
    + *mbus_fmt = format->format;
    +
    + mutex_unlock(&ov7740->mutex);
    + return 0;
    +#else
    + ret = -ENOTTY;
    + goto error;
    +#endif
    + }
    +
    + ret = ov7740_try_fmt_internal(sd, &format->format, &ovfmt, &fsize);
    + if (ret)
    + goto error;
    +
    + if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
    + regmap_multi_reg_write(ov7740->regmap,
    + ovfmt->regs, ovfmt->reg_num);
    +
    + regmap_multi_reg_write(ov7740->regmap,
    + fsize->regs, fsize->reg_num);
    + }
    +
    + ov7740->fmt = ovfmt;
    + ov7740->frmsize = fsize;
    +
    + mutex_unlock(&ov7740->mutex);
    + return 0;
    +
    +error:
    + mutex_unlock(&ov7740->mutex);
    + return ret;
    +}
    +
    +static int ov7740_get_fmt(struct v4l2_subdev *sd,
    + struct v4l2_subdev_pad_config *cfg,
    + struct v4l2_subdev_format *format)
    +{
    + struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
    +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
    + struct v4l2_mbus_framefmt *mbus_fmt;
    +#endif
    + int ret = 0;
    +
    + mutex_lock(&ov7740->mutex);
    + if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
    +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
    + mbus_fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
    + format->format = *mbus_fmt;
    + ret = 0;
    +#else
    + ret = -ENOTTY;
    +#endif
    + } else {
    + format->format = ov7740->format;
    + }
    + mutex_unlock(&ov7740->mutex);
    +
    + return ret;
    +}
    +
    +static const struct v4l2_subdev_pad_ops ov7740_subdev_pad_ops = {
    + .enum_frame_interval = ov7740_enum_frame_interval,
    + .enum_frame_size = ov7740_enum_frame_size,
    + .enum_mbus_code = ov7740_enum_mbus_code,
    + .get_fmt = ov7740_get_fmt,
    + .set_fmt = ov7740_set_fmt,
    +};
    +
    +static const struct v4l2_subdev_ops ov7740_subdev_ops = {
    + .core = &ov7740_subdev_core_ops,
    + .video = &ov7740_subdev_video_ops,
    + .pad = &ov7740_subdev_pad_ops,
    +};
    +
    +static void ov7740_get_default_format(struct v4l2_subdev *sd,
    + struct v4l2_mbus_framefmt *format)
    +{
    + struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
    +
    + format->width = ov7740->frmsize->width;
    + format->height = ov7740->frmsize->height;
    + format->colorspace = ov7740->fmt->colorspace;
    + format->code = ov7740->fmt->mbus_code;
    + format->field = V4L2_FIELD_NONE;
    +}
    +
    +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
    +static int ov7740_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
    +{
    + struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
    + struct v4l2_mbus_framefmt *format =
    + v4l2_subdev_get_try_format(sd, fh->pad, 0);
    +
    + mutex_lock(&ov7740->mutex);
    + ov7740_get_default_format(sd, format);
    + mutex_unlock(&ov7740->mutex);
    +
    + return 0;
    +}
    +
    +static const struct v4l2_subdev_internal_ops ov7740_subdev_internal_ops = {
    + .open = ov7740_open,
    +};
    +#endif
    +
    +static int ov7740_probe_dt(struct i2c_client *client,
    + struct ov7740 *ov7740)
    +{
    + ov7740->resetb_gpio = devm_gpiod_get_optional(&client->dev, "reset",
    + GPIOD_OUT_HIGH);
    + if (IS_ERR(ov7740->resetb_gpio)) {
    + dev_info(&client->dev, "can't get %s GPIO\n", "reset");
    + return PTR_ERR(ov7740->resetb_gpio);
    + }
    +
    + ov7740->pwdn_gpio = devm_gpiod_get_optional(&client->dev, "powerdown",
    + GPIOD_OUT_LOW);
    + if (IS_ERR(ov7740->pwdn_gpio)) {
    + dev_info(&client->dev, "can't get %s GPIO\n", "powerdown");
    + return PTR_ERR(ov7740->pwdn_gpio);
    + }
    +
    + return 0;
    +}
    +
    +static int ov7740_detect(struct ov7740 *ov7740)
    +{
    + struct regmap *regmap = ov7740->regmap;
    + unsigned int midh, midl, pidh, pidl;
    + int ret;
    +
    + ret = regmap_read(regmap, REG_MIDH, &midh);
    + if (ret)
    + return ret;
    + if (midh != 0x7f)
    + return -ENODEV;
    +
    + ret = regmap_read(regmap, REG_MIDL, &midl);
    + if (ret)
    + return ret;
    + if (midl != 0xa2)
    + return -ENODEV;
    +
    + ret = regmap_read(regmap, REG_PIDH, &pidh);
    + if (ret)
    + return ret;
    + if (pidh != 0x77)
    + return -ENODEV;
    +
    + ret = regmap_read(regmap, REG_PIDL, &pidl);
    + if (ret)
    + return ret;
    + if ((pidl != 0x40) && (pidl != 0x41) && (pidl != 0x42))
    + return -ENODEV;
    +
    + return 0;
    +}
    +
    +static int ov7740_init_controls(struct ov7740 *ov7740)
    +{
    + struct i2c_client *client = v4l2_get_subdevdata(&ov7740->subdev);
    + struct v4l2_ctrl_handler *ctrl_hdlr = &ov7740->ctrl_handler;
    + int ret;
    +
    + ret = v4l2_ctrl_handler_init(ctrl_hdlr, 2);
    + if (ret < 0)
    + return ret;
    +
    + ctrl_hdlr->lock = &ov7740->mutex;
    + ov7740->auto_wb = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
    + V4L2_CID_AUTO_WHITE_BALANCE,
    + 0, 1, 1, 1);
    + ov7740->blue_balance = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
    + V4L2_CID_BLUE_BALANCE,
    + 0, 0xff, 1, 0x80);
    + ov7740->red_balance = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
    + V4L2_CID_RED_BALANCE,
    + 0, 0xff, 1, 0x80);
    +
    + ov7740->brightness = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
    + V4L2_CID_BRIGHTNESS,
    + -255, 255, 1, 0);
    + ov7740->contrast = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
    + V4L2_CID_CONTRAST,
    + 0, 127, 1, 0x20);
    + ov7740->saturation = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
    + V4L2_CID_SATURATION, 0, 256, 1, 0x80);
    + ov7740->hflip = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
    + V4L2_CID_HFLIP, 0, 1, 1, 0);
    + ov7740->vflip = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
    + V4L2_CID_VFLIP, 0, 1, 1, 0);
    + ov7740->gain = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
    + V4L2_CID_GAIN, 0, 1023, 1, 500);
    + ov7740->auto_gain = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
    + V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
    + ov7740->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
    + V4L2_CID_EXPOSURE, 0, 65535, 1, 500);
    + ov7740->auto_exposure = v4l2_ctrl_new_std_menu(ctrl_hdlr,
    + &ov7740_ctrl_ops,
    + V4L2_CID_EXPOSURE_AUTO,
    + V4L2_EXPOSURE_MANUAL, 0,
    + V4L2_EXPOSURE_AUTO);
    +
    + ov7740->gain->flags |= V4L2_CTRL_FLAG_VOLATILE;
    + ov7740->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE;
    +
    + v4l2_ctrl_auto_cluster(3, &ov7740->auto_wb, 0, false);
    + v4l2_ctrl_auto_cluster(2, &ov7740->auto_gain, 0, true);
    + v4l2_ctrl_auto_cluster(2, &ov7740->auto_exposure,
    + V4L2_EXPOSURE_MANUAL, false);
    + v4l2_ctrl_cluster(2, &ov7740->hflip);
    +
    + ret = v4l2_ctrl_handler_setup(ctrl_hdlr);
    + if (ret) {
    + dev_err(&client->dev, "%s control init failed (%d)\n",
    + __func__, ret);
    + goto error;
    + }
    +
    + ov7740->subdev.ctrl_handler = ctrl_hdlr;
    + return 0;
    +
    +error:
    + v4l2_ctrl_handler_free(ctrl_hdlr);
    + mutex_destroy(&ov7740->mutex);
    + return ret;
    +}
    +
    +static void ov7740_free_controls(struct ov7740 *ov7740)
    +{
    + v4l2_ctrl_handler_free(ov7740->subdev.ctrl_handler);
    + mutex_destroy(&ov7740->mutex);
    +}
    +
    +#define OV7740_MAX_REGISTER 0xff
    +static const struct regmap_config ov7740_regmap_config = {
    + .reg_bits = 8,
    + .val_bits = 8,
    + .max_register = OV7740_MAX_REGISTER,
    +};
    +
    +static int ov7740_probe(struct i2c_client *client,
    + const struct i2c_device_id *id)
    +{
    + struct ov7740 *ov7740;
    + struct v4l2_subdev *sd;
    + int ret;
    +
    + if (!i2c_check_functionality(client->adapter,
    + I2C_FUNC_SMBUS_BYTE_DATA)) {
    + dev_err(&client->dev,
    + "OV7740: I2C-Adapter doesn't support SMBUS\n");
    + return -EIO;
    + }
    +
    + ov7740 = devm_kzalloc(&client->dev, sizeof(*ov7740), GFP_KERNEL);
    + if (!ov7740)
    + return -ENOMEM;
    +
    + ov7740->xvclk = devm_clk_get(&client->dev, "xvclk");
    + if (IS_ERR(ov7740->xvclk)) {
    + ret = PTR_ERR(ov7740->xvclk);
    + dev_err(&client->dev,
    + "OV7740: fail to get xvclk: %d\n", ret);
    + return ret;
    + }
    +
    + ret = ov7740_probe_dt(client, ov7740);
    + if (ret)
    + return ret;
    +
    + ov7740->regmap = devm_regmap_init_i2c(client, &ov7740_regmap_config);
    + if (IS_ERR(ov7740->regmap)) {
    + ret = PTR_ERR(ov7740->regmap);
    + dev_err(&client->dev, "Failed to allocate register map: %d\n",
    + ret);
    + return ret;
    + }
    +
    + sd = &ov7740->subdev;
    + client->flags |= I2C_CLIENT_SCCB;
    + v4l2_i2c_subdev_init(sd, client, &ov7740_subdev_ops);
    +
    +#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
    + sd->internal_ops = &ov7740_subdev_internal_ops;
    + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
    +#endif
    +
    +#if defined(CONFIG_MEDIA_CONTROLLER)
    + ov7740->pad.flags = MEDIA_PAD_FL_SOURCE;
    + sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
    + ret = media_entity_pads_init(&sd->entity, 1, &ov7740->pad);
    + if (ret)
    + return ret;
    +#endif
    +
    + ret = ov7740_set_power(ov7740, 1);
    + if (ret)
    + return ret;
    +
    + ret = ov7740_detect(ov7740);
    + if (ret)
    + goto error_detect;
    +
    + mutex_init(&ov7740->mutex);
    +
    + ret = ov7740_init_controls(ov7740);
    + if (ret)
    + goto error_init_controls;
    +
    + v4l_info(client, "chip found @ 0x%02x (%s)\n",
    + client->addr << 1, client->adapter->name);
    +
    + ov7740->fmt = &ov7740_formats[0];
    + ov7740->frmsize = &ov7740_framesizes[0];
    +
    + ov7740_get_default_format(sd, &ov7740->format);
    +
    + ret = v4l2_async_register_subdev(sd);
    + if (ret)
    + goto error_async_register;
    +
    + pm_runtime_set_active(&client->dev);
    + pm_runtime_enable(&client->dev);
    + pm_runtime_idle(&client->dev);
    +
    + return 0;
    +
    +error_async_register:
    + v4l2_ctrl_handler_free(ov7740->subdev.ctrl_handler);
    +error_init_controls:
    + ov7740_free_controls(ov7740);
    +error_detect:
    + ov7740_set_power(ov7740, 0);
    + media_entity_cleanup(&ov7740->subdev.entity);
    +
    + return ret;
    +}
    +
    +static int ov7740_remove(struct i2c_client *client)
    +{
    + struct v4l2_subdev *sd = i2c_get_clientdata(client);
    + struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
    +
    + mutex_destroy(&ov7740->mutex);
    + v4l2_ctrl_handler_free(ov7740->subdev.ctrl_handler);
    +#if defined(CONFIG_MEDIA_CONTROLLER)
    + media_entity_cleanup(&ov7740->subdev.entity);
    +#endif
    + v4l2_async_unregister_subdev(sd);
    + ov7740_free_controls(ov7740);
    +
    + pm_runtime_get_sync(&client->dev);
    + pm_runtime_disable(&client->dev);
    + pm_runtime_set_suspended(&client->dev);
    + pm_runtime_put_noidle(&client->dev);
    +
    + ov7740_set_power(ov7740, 0);
    + return 0;
    +}
    +
    +static int __maybe_unused ov7740_runtime_suspend(struct device *dev)
    +{
    + struct i2c_client *client = to_i2c_client(dev);
    + struct v4l2_subdev *sd = i2c_get_clientdata(client);
    + struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
    +
    + ov7740_set_power(ov7740, 0);
    +
    + return 0;
    +}
    +
    +static int __maybe_unused ov7740_runtime_resume(struct device *dev)
    +{
    + struct i2c_client *client = to_i2c_client(dev);
    + struct v4l2_subdev *sd = i2c_get_clientdata(client);
    + struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
    +
    + return ov7740_set_power(ov7740, 1);
    +}
    +
    +static const struct i2c_device_id ov7740_id[] = {
    + { "ov7740", 0 },
    + { /* sentinel */ }
    +};
    +MODULE_DEVICE_TABLE(i2c, ov7740_id);
    +
    +static const struct dev_pm_ops ov7740_pm_ops = {
    + SET_RUNTIME_PM_OPS(ov7740_runtime_suspend, ov7740_runtime_resume, NULL)
    +};
    +
    +static const struct of_device_id ov7740_of_match[] = {
    + {.compatible = "ovti,ov7740", },
    + { /* sentinel */ },
    +};
    +MODULE_DEVICE_TABLE(of, ov7740_of_match);
    +
    +static struct i2c_driver ov7740_i2c_driver = {
    + .driver = {
    + .name = "ov7740",
    + .pm = &ov7740_pm_ops,
    + .of_match_table = of_match_ptr(ov7740_of_match),
    + },
    + .probe = ov7740_probe,
    + .remove = ov7740_remove,
    + .id_table = ov7740_id,
    +};
    +module_i2c_driver(ov7740_i2c_driver);
    +
    +MODULE_DESCRIPTION("The V4L2 driver for Omnivision 7740 sensor");
    +MODULE_AUTHOR("Songjun Wu <songjun.wu@atmel.com>");
    +MODULE_LICENSE("GPL v2");
    --
    2.15.0
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     \ /
      Last update: 2017-12-06 03:31    [W:4.500 / U:0.588 seconds]
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