// SPDX-License-Identifier: GPL-2.0
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/*
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* adv7181 driver
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*
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* Copyright (C) 2018 Fuzhou Rockchip Electronics Co., Ltd.
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*/
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#include <linux/clk.h>
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#include <linux/device.h>
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#include <linux/gpio/consumer.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/pm_runtime.h>
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#include <linux/regulator/consumer.h>
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#include <linux/sysfs.h>
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#include <media/media-entity.h>
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#include <media/v4l2-async.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-subdev.h>
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#define REG_CHIP_ID 0x11
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#define CHIP_ID 0x20
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#define REG_SC_CTRL_MODE 0x03
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#define SC_CTRL_MODE_STANDBY 0x4c
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#define SC_CTRL_MODE_STREAMING 0x0c
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#define REG_NULL 0xFF
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#define ADV7181_XVCLK_FREQ 24000000
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#define ADV7181_LANES 1
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#define ADV7181_BITS_PER_SAMPLE 10
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#define ADV7181_SKIP_TOP 24
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static const char * const adv7181_supply_names[] = {
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"dvdd",
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"dvddio",
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};
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#define ADV7181_NUM_SUPPLIES ARRAY_SIZE(adv7181_supply_names)
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struct regval {
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u8 addr;
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u8 val;
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};
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struct adv7181_mode {
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u32 width;
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u32 height;
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const struct regval *reg_list;
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};
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struct adv7181 {
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struct i2c_client *client;
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struct clk *xvclk;
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struct gpio_desc *reset_gpio;
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struct regulator_bulk_data supplies[ADV7181_NUM_SUPPLIES];
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bool streaming;
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struct mutex mutex; /* lock to serialize v4l2 callback */
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struct v4l2_subdev subdev;
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struct media_pad pad;
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int skip_top;
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const struct adv7181_mode *cur_mode;
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};
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#define to_adv7181(sd) container_of(sd, struct adv7181, subdev)
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/* PLL settings bases on 28M xvclk, resolution 720x480 30fps*/
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static struct regval adv7181_cvbs_30fps[] = {
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{0x00, 0x0B},
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{0x04, 0x77},
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{0x17, 0x41},
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{0x1D, 0x47},
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{0x31, 0x02},
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{0x3A, 0x17},
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{0x3B, 0x81},
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{0x3D, 0xA2},
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{0x3E, 0x6A},
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{0x3F, 0xA0},
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{0x86, 0x0B},
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{0xF3, 0x01},
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{0xF9, 0x03},
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{0x0E, 0x80},
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{0x52, 0x46},
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{0x54, 0x80},
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{0x7F, 0xFF},
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{0x81, 0x30},
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{0x90, 0xC9},
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{0x91, 0x40},
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{0x92, 0x3C},
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{0x93, 0xCA},
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{0x94, 0xD5},
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{0xB1, 0xFF},
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{0xB6, 0x08},
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{0xC0, 0x9A},
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{0xCF, 0x50},
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{0xD0, 0x4E},
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{0xD1, 0xB9},
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{0xD6, 0xDD},
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{0xD7, 0xE2},
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{0xE5, 0x51},
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{0xF6, 0x3B},
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{0x0E, 0x00},
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{0x03, 0x4C},
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{REG_NULL, 0x0},
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};
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static const struct adv7181_mode supported_modes[] = {
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{
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.width = 720,
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.height = 480,
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.reg_list = adv7181_cvbs_30fps,
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},
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};
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static int adv7181_write_reg(struct i2c_client *client, u8 reg, u8 val)
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{
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int ret;
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ret = i2c_smbus_write_byte_data(client, reg, val);
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if (ret < 0)
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dev_err(&client->dev, "write reg error: %d\n", ret);
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return ret;
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}
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static int adv7181_write_array(struct i2c_client *client,
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const struct regval *regs)
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{
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int i, ret = 0;
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for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++)
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ret = adv7181_write_reg(client, regs[i].addr, regs[i].val);
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return ret;
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}
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static inline u8 adv7181_read_reg(struct i2c_client *client, u8 reg)
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{
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return i2c_smbus_read_byte_data(client, reg);
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}
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static void adv7181_fill_fmt(const struct adv7181_mode *mode,
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struct v4l2_mbus_framefmt *fmt)
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{
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fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
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fmt->width = mode->width;
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fmt->height = mode->height;
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fmt->field = V4L2_FIELD_NONE;
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fmt->colorspace = V4L2_COLORSPACE_SMPTE170M;
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}
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static int adv7181_set_fmt(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_format *fmt)
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{
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struct adv7181 *adv7181 = to_adv7181(sd);
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struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format;
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/* only one mode supported for now */
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adv7181_fill_fmt(adv7181->cur_mode, mbus_fmt);
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return 0;
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}
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static int adv7181_get_fmt(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_format *fmt)
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{
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struct adv7181 *adv7181 = to_adv7181(sd);
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struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format;
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adv7181_fill_fmt(adv7181->cur_mode, mbus_fmt);
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return 0;
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}
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static int adv7181_enum_mbus_code(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_mbus_code_enum *code)
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{
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if (code->index >= ARRAY_SIZE(supported_modes))
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return -EINVAL;
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code->code = MEDIA_BUS_FMT_UYVY8_2X8;
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return 0;
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}
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static int adv7181_enum_frame_sizes(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_frame_size_enum *fse)
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{
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u32 index = fse->index;
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if (index >= ARRAY_SIZE(supported_modes))
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return -EINVAL;
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fse->code = MEDIA_BUS_FMT_UYVY8_2X8;
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fse->min_width = supported_modes[index].width;
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fse->max_width = supported_modes[index].width;
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fse->max_height = supported_modes[index].height;
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fse->min_height = supported_modes[index].height;
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return 0;
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}
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static int adv7181_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
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{
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struct adv7181 *adv7181 = to_adv7181(sd);
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*lines = adv7181->skip_top;
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return 0;
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}
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static int adv7181_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
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{
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/* Only NTSC now */
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*std = V4L2_STD_NTSC;
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return 0;
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}
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static int __adv7181_power_on(struct adv7181 *adv7181)
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{
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int ret;
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struct device *dev = &adv7181->client->dev;
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if (!IS_ERR(adv7181->xvclk)) {
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ret = clk_prepare_enable(adv7181->xvclk);
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if (ret < 0) {
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dev_err(dev, "Failed to enable xvclk\n");
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return ret;
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}
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}
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gpiod_set_value_cansleep(adv7181->reset_gpio, 1);
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ret = regulator_bulk_enable(ADV7181_NUM_SUPPLIES, adv7181->supplies);
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if (ret < 0) {
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dev_err(dev, "Failed to enable regulators\n");
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goto disable_clk;
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}
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gpiod_set_value_cansleep(adv7181->reset_gpio, 0);
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return 0;
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disable_clk:
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if (!IS_ERR(adv7181->xvclk))
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clk_disable_unprepare(adv7181->xvclk);
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return ret;
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}
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static void __adv7181_power_off(struct adv7181 *adv7181)
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{
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if (!IS_ERR(adv7181->xvclk))
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clk_disable_unprepare(adv7181->xvclk);
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gpiod_set_value_cansleep(adv7181->reset_gpio, 1);
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regulator_bulk_disable(ADV7181_NUM_SUPPLIES, adv7181->supplies);
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}
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static int adv7181_s_stream(struct v4l2_subdev *sd, int on)
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{
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struct adv7181 *adv7181 = to_adv7181(sd);
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struct i2c_client *client = adv7181->client;
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int ret = 0;
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mutex_lock(&adv7181->mutex);
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on = !!on;
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if (on == adv7181->streaming)
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goto unlock_and_return;
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if (on) {
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ret = pm_runtime_get_sync(&adv7181->client->dev);
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if (ret < 0) {
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pm_runtime_put_noidle(&client->dev);
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goto unlock_and_return;
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}
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ret = adv7181_write_array(adv7181->client,
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adv7181->cur_mode->reg_list);
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if (ret) {
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pm_runtime_put(&client->dev);
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goto unlock_and_return;
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}
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ret = adv7181_write_reg(client, REG_SC_CTRL_MODE,
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SC_CTRL_MODE_STREAMING);
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if (ret) {
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pm_runtime_put(&client->dev);
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goto unlock_and_return;
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}
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} else {
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adv7181_write_reg(client, REG_SC_CTRL_MODE,
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SC_CTRL_MODE_STANDBY);
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pm_runtime_put(&client->dev);
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}
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adv7181->streaming = on;
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unlock_and_return:
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mutex_unlock(&adv7181->mutex);
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return ret;
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}
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#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
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static int adv7181_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
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{
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struct adv7181 *adv7181 = to_adv7181(sd);
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struct v4l2_mbus_framefmt *try_fmt;
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mutex_lock(&adv7181->mutex);
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try_fmt = v4l2_subdev_get_try_format(sd, fh->pad, 0);
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/* Initialize try_fmt */
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adv7181_fill_fmt(&supported_modes[0], try_fmt);
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mutex_unlock(&adv7181->mutex);
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return 0;
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}
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#endif
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static int adv7181_runtime_resume(struct device *dev)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
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struct adv7181 *adv7181 = to_adv7181(sd);
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return __adv7181_power_on(adv7181);
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}
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static int adv7181_runtime_suspend(struct device *dev)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
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struct adv7181 *adv7181 = to_adv7181(sd);
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__adv7181_power_off(adv7181);
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return 0;
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}
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static const struct dev_pm_ops adv7181_pm_ops = {
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SET_RUNTIME_PM_OPS(adv7181_runtime_suspend,
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adv7181_runtime_resume, NULL)
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};
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static const struct v4l2_subdev_video_ops adv7181_video_ops = {
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.s_stream = adv7181_s_stream,
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.querystd = adv7181_querystd,
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};
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static const struct v4l2_subdev_pad_ops adv7181_pad_ops = {
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.enum_mbus_code = adv7181_enum_mbus_code,
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.enum_frame_size = adv7181_enum_frame_sizes,
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.get_fmt = adv7181_get_fmt,
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.set_fmt = adv7181_set_fmt,
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};
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static struct v4l2_subdev_sensor_ops adv7181_sensor_ops = {
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.g_skip_top_lines = adv7181_g_skip_top_lines,
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};
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static const struct v4l2_subdev_ops adv7181_subdev_ops = {
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.video = &adv7181_video_ops,
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.pad = &adv7181_pad_ops,
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.sensor = &adv7181_sensor_ops,
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};
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#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
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static const struct v4l2_subdev_internal_ops adv7181_internal_ops = {
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.open = adv7181_open,
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};
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#endif
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static int adv7181_check_sensor_id(struct adv7181 *adv7181,
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struct i2c_client *client)
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{
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struct device *dev = &adv7181->client->dev;
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u8 id;
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id = adv7181_read_reg(client, REG_CHIP_ID);
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if (id != CHIP_ID) {
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dev_err(dev, "Wrong camera sensor id(%04x)\n", id);
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return -EINVAL;
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}
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dev_info(dev, "Detected ADV7181 (%04x) sensor\n", CHIP_ID);
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return 0;
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}
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static int adv7181_configure_regulators(struct adv7181 *adv7181)
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{
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u32 i;
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for (i = 0; i < ADV7181_NUM_SUPPLIES; i++)
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adv7181->supplies[i].supply = adv7181_supply_names[i];
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return devm_regulator_bulk_get(&adv7181->client->dev,
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ADV7181_NUM_SUPPLIES,
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adv7181->supplies);
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}
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static int adv7181_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct device *dev = &client->dev;
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struct adv7181 *adv7181;
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int ret;
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adv7181 = devm_kzalloc(dev, sizeof(*adv7181), GFP_KERNEL);
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if (!adv7181)
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return -ENOMEM;
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adv7181->skip_top = ADV7181_SKIP_TOP;
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adv7181->client = client;
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adv7181->cur_mode = &supported_modes[0];
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adv7181->xvclk = devm_clk_get(dev, "xvclk");
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if (!IS_ERR(adv7181->xvclk)) {
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ret = clk_set_rate(adv7181->xvclk, ADV7181_XVCLK_FREQ);
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if (ret < 0) {
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dev_err(dev, "Failed to set xvclk rate (24MHz)\n");
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return ret;
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}
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if (clk_get_rate(adv7181->xvclk) != ADV7181_XVCLK_FREQ)
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dev_warn(dev, "xvclk mismatched, it requires 24MHz\n");
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}
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adv7181->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
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if (IS_ERR(adv7181->reset_gpio)) {
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dev_err(dev, "Failed to get reset-gpios\n");
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return -EINVAL;
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}
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ret = adv7181_configure_regulators(adv7181);
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if (ret) {
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dev_err(dev, "Failed to get power regulators\n");
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return ret;
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}
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mutex_init(&adv7181->mutex);
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v4l2_i2c_subdev_init(&adv7181->subdev, client, &adv7181_subdev_ops);
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ret = __adv7181_power_on(adv7181);
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if (ret)
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goto err_destroy_mutex;
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ret = adv7181_check_sensor_id(adv7181, client);
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if (ret)
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goto err_power_off;
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#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
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adv7181->subdev.internal_ops = &adv7181_internal_ops;
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adv7181->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
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#endif
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#if defined(CONFIG_MEDIA_CONTROLLER)
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adv7181->pad.flags = MEDIA_PAD_FL_SOURCE;
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adv7181->subdev.entity.type = MEDIA_ENT_T_V4L2_SUBDEV_SENSOR;
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ret = media_entity_init(&adv7181->subdev.entity, 1, &adv7181->pad, 0);
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if (ret < 0)
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goto err_power_off;
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#endif
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ret = v4l2_async_register_subdev(&adv7181->subdev);
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if (ret) {
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dev_err(dev, "v4l2 async register subdev failed\n");
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goto err_clean_entity;
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}
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pm_runtime_set_active(dev);
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pm_runtime_enable(dev);
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pm_runtime_idle(dev);
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return 0;
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err_clean_entity:
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#if defined(CONFIG_MEDIA_CONTROLLER)
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media_entity_cleanup(&adv7181->subdev.entity);
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#endif
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err_power_off:
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__adv7181_power_off(adv7181);
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err_destroy_mutex:
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mutex_destroy(&adv7181->mutex);
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return ret;
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}
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static int adv7181_remove(struct i2c_client *client)
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{
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
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struct adv7181 *adv7181 = to_adv7181(sd);
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v4l2_async_unregister_subdev(sd);
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#if defined(CONFIG_MEDIA_CONTROLLER)
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media_entity_cleanup(&sd->entity);
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#endif
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mutex_destroy(&adv7181->mutex);
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pm_runtime_disable(&client->dev);
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if (!pm_runtime_status_suspended(&client->dev))
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__adv7181_power_off(adv7181);
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pm_runtime_set_suspended(&client->dev);
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return 0;
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}
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static const struct i2c_device_id adv7181_id[] = {
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{"adv7181", 0},
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{},
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};
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#if IS_ENABLED(CONFIG_OF)
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static const struct of_device_id adv7181_of_match[] = {
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{ .compatible = "adi,adv7181" },
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{},
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};
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MODULE_DEVICE_TABLE(of, adv7181_of_match);
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#endif
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static struct i2c_driver adv7181_i2c_driver = {
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.driver = {
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.name = "adv7181",
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.pm = &adv7181_pm_ops,
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.of_match_table = adv7181_of_match
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},
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.probe = adv7181_probe,
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.remove = adv7181_remove,
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.id_table = adv7181_id,
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};
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module_i2c_driver(adv7181_i2c_driver);
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MODULE_DESCRIPTION("adv7181 sensor driver");
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MODULE_LICENSE("GPL v2");
|
