// SPDX-License-Identifier: GPL-2.0
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/*
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* dw9718 vcm driver
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*
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* Copyright (C) 2019 Fuzhou Rockchip Electronics Co., Ltd.
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*/
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#include <linux/delay.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/rk-camera-module.h>
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#include <linux/version.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-device.h>
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#include <linux/rk_vcm_head.h>
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#define DRIVER_VERSION KERNEL_VERSION(0, 0x01, 0x0)
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#define DW9718_NAME "dw9718"
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#define DW9718T_PD_REG 0X00
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#define DW9718T_CONTROL 0X01
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#define DW9718T_DATAM_REG 0X02
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#define DW9718T_DATAL_REG 0X03
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#define DW9718T_SW_REG 0X04
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#define DW9718T_SACT_REG 0X05
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#define DW9718T_FLAG_REG 0X10
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#define DW9718_MAX_CURRENT 100U
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#define DW9718_MAX_REG 1023U
|
|
#define DW9718_DEFAULT_START_CURRENT 0
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#define DW9718_DEFAULT_RATED_CURRENT 100
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#define DW9718_DEFAULT_STEP_MODE 0xd
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#define REG_NULL 0xFF
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#define OF_CAMERA_VCMDRV_CONTROL_MODE "rockchip,vcm-control-mode"
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#define OF_CAMERA_VCMDRV_SACDIV_MODE "rockchip,vcm-sacdiv-mode"
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#define VCMDRV_DEFAULT_CONTROL_MODE 4
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#define VCMDRV_DEFAULT_SACDIV_MODE 1
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/* dw9718 device structure */
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struct dw9718_device {
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struct v4l2_ctrl_handler ctrls_vcm;
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struct v4l2_subdev sd;
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struct v4l2_device vdev;
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u16 current_val;
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unsigned short current_related_pos;
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unsigned short current_lens_pos;
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unsigned int start_current;
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unsigned int rated_current;
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unsigned int step;
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unsigned int step_mode;
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unsigned int control_mode;
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unsigned int sacdiv_mode;
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unsigned long mv_time_per_pos;
|
|
struct timeval start_move_tv;
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struct timeval end_move_tv;
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unsigned long move_us;
|
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u32 module_index;
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const char *module_facing;
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};
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static inline struct dw9718_device *to_dw9718_vcm(struct v4l2_ctrl *ctrl)
|
{
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return container_of(ctrl->handler, struct dw9718_device, ctrls_vcm);
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}
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static inline struct dw9718_device *sd_to_dw9718_vcm(struct v4l2_subdev *subdev)
|
{
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return container_of(subdev, struct dw9718_device, sd);
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}
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static int dw9718_read_reg(struct i2c_client *client,
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u8 addr, u32 *val, u8 len)
|
{
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struct i2c_msg msgs[2];
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u8 *data_be_p;
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__be32 data_be = 0;
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int ret;
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if (len > 4 || !len)
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return -EINVAL;
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data_be_p = (u8 *)&data_be;
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/* Write register address */
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msgs[0].addr = client->addr;
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msgs[0].flags = 0;
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msgs[0].len = 1;
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msgs[0].buf = (u8 *)&addr;
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/* Read data from register */
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msgs[1].addr = client->addr;
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msgs[1].flags = I2C_M_RD;
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msgs[1].len = len;
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msgs[1].buf = &data_be_p[4 - len];
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ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
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if (ret != ARRAY_SIZE(msgs))
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return -EIO;
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*val = be32_to_cpu(data_be);
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return 0;
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}
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static int dw9718_write_reg(struct i2c_client *client,
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u8 addr, u32 val, u8 len)
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{
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u32 buf_i, val_i;
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u8 buf[5];
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u8 *val_p;
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__be32 val_be;
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if (len > 4)
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return -EINVAL;
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buf[0] = addr & 0xff;
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val_be = cpu_to_be32(val);
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val_p = (u8 *)&val_be;
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buf_i = 1;
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val_i = 4 - len;
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while (val_i < 4)
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buf[buf_i++] = val_p[val_i++];
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if (i2c_master_send(client, buf, len + 1) != len + 1)
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return -EIO;
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return 0;
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}
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static int dw9718_get_pos(struct dw9718_device *dev_vcm,
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unsigned int *cur_pos)
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{
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struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd);
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int ret;
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u32 val;
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unsigned int abs_step;
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ret = dw9718_read_reg(client, DW9718T_DATAM_REG, &val, 2);
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if (ret != 0)
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goto err;
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abs_step = val & 0x3ff;
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if (abs_step <= dev_vcm->start_current)
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abs_step = VCMDRV_MAX_LOG;
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else if ((abs_step > dev_vcm->start_current) &&
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(abs_step <= dev_vcm->rated_current))
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abs_step = (dev_vcm->rated_current - abs_step) / dev_vcm->step;
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else
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abs_step = 0;
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*cur_pos = abs_step;
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dev_dbg(&client->dev, "%s: get position %d\n", __func__, *cur_pos);
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return 0;
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err:
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dev_err(&client->dev,
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"%s: failed with error %d\n", __func__, ret);
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return ret;
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}
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static int dw9718_set_pos(struct dw9718_device *dev_vcm,
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unsigned int dest_pos)
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{
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int ret;
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unsigned int position = 0;
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struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd);
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if (dest_pos >= VCMDRV_MAX_LOG)
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position = dev_vcm->start_current;
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else
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position = dev_vcm->start_current +
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(dev_vcm->step * (VCMDRV_MAX_LOG - dest_pos));
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if (position > DW9718_MAX_REG)
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position = DW9718_MAX_REG;
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dev_vcm->current_lens_pos = position;
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dev_vcm->current_related_pos = dest_pos;
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ret = dw9718_write_reg(client, DW9718T_DATAM_REG, position & 0x3ff, 2);
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if (ret != 0)
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goto err;
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return ret;
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err:
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dev_err(&client->dev,
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"%s: failed with error %d\n", __func__, ret);
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return ret;
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}
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static int dw9718_get_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct dw9718_device *dev_vcm = to_dw9718_vcm(ctrl);
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if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE)
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return dw9718_get_pos(dev_vcm, &ctrl->val);
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return -EINVAL;
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}
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static int dw9718_set_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct dw9718_device *dev_vcm = to_dw9718_vcm(ctrl);
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struct i2c_client *client = v4l2_get_subdevdata(&dev_vcm->sd);
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unsigned int dest_pos = ctrl->val;
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int move_pos;
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long mv_us;
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int ret = 0;
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if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE) {
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if (dest_pos > VCMDRV_MAX_LOG) {
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dev_info(&client->dev,
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"%s dest_pos is error. %d > %d\n",
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__func__, dest_pos, VCMDRV_MAX_LOG);
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return -EINVAL;
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}
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/* calculate move time */
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move_pos = dev_vcm->current_related_pos - dest_pos;
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if (move_pos < 0)
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move_pos = -move_pos;
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ret = dw9718_set_pos(dev_vcm, dest_pos);
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if (dev_vcm->control_mode == 1)
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dev_vcm->move_us = dev_vcm->mv_time_per_pos * move_pos;
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else
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dev_vcm->move_us = dev_vcm->mv_time_per_pos;
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dev_dbg(&client->dev,
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"dest_pos %d, move_us %ld\n",
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dest_pos, dev_vcm->move_us);
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dev_vcm->start_move_tv = ns_to_timeval(ktime_get_ns());
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mv_us = dev_vcm->start_move_tv.tv_usec + dev_vcm->move_us;
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if (mv_us >= 1000000) {
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dev_vcm->end_move_tv.tv_sec =
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dev_vcm->start_move_tv.tv_sec + 1;
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dev_vcm->end_move_tv.tv_usec = mv_us - 1000000;
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} else {
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dev_vcm->end_move_tv.tv_sec =
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dev_vcm->start_move_tv.tv_sec;
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dev_vcm->end_move_tv.tv_usec = mv_us;
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}
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}
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return ret;
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}
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static const struct v4l2_ctrl_ops dw9718_vcm_ctrl_ops = {
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.g_volatile_ctrl = dw9718_get_ctrl,
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.s_ctrl = dw9718_set_ctrl,
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};
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static int dw9718t_init(struct dw9718_device *dev)
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{
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int ret = 0;
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struct i2c_client *client = v4l2_get_subdevdata(&dev->sd);
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u32 control_mode = 0;
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u32 step_mode = 0;
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/*There is need a sleep after power on for write i2c*/
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usleep_range(10000, 11000);
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dev_info(&client->dev, "enter vcm driver init\n");
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ret = dw9718_write_reg(client, DW9718T_PD_REG, 0, 1);
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if (ret < 0)
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goto err;
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/*There is need a sleep after out of standby status*/
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msleep(100);
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step_mode = (dev->sacdiv_mode << 6) | (dev->step_mode & 0x3f);
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ret = dw9718_write_reg(client, DW9718T_SACT_REG, step_mode, 1);
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if (ret < 0)
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goto err;
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control_mode = 0x31;
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control_mode |= (dev->control_mode & 0x07) << 1;
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ret = dw9718_write_reg(client, DW9718T_CONTROL, control_mode, 1);
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if (ret < 0)
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goto err;
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return 0;
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err:
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dev_err(&client->dev, "failed with error %d\n", ret);
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return ret;
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}
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static int dw9718_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
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{
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int rval;
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struct dw9718_device *dev_vcm = sd_to_dw9718_vcm(sd);
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rval = pm_runtime_get_sync(sd->dev);
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if (rval < 0) {
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pm_runtime_put_noidle(sd->dev);
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return rval;
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}
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rval = dw9718t_init(dev_vcm);
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if (rval < 0) {
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pm_runtime_put_noidle(sd->dev);
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return rval;
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}
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return 0;
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}
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static int dw9718_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
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{
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pm_runtime_put(sd->dev);
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return 0;
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}
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static const struct v4l2_subdev_internal_ops dw9718_int_ops = {
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.open = dw9718_open,
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.close = dw9718_close,
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};
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static long dw9718_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
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{
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int ret = 0;
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struct rk_cam_vcm_tim *vcm_tim;
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct dw9718_device *dw9718_dev = sd_to_dw9718_vcm(sd);
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if (cmd == RK_VIDIOC_VCM_TIMEINFO) {
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vcm_tim = (struct rk_cam_vcm_tim *)arg;
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vcm_tim->vcm_start_t.tv_sec = dw9718_dev->start_move_tv.tv_sec;
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vcm_tim->vcm_start_t.tv_usec =
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dw9718_dev->start_move_tv.tv_usec;
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vcm_tim->vcm_end_t.tv_sec = dw9718_dev->end_move_tv.tv_sec;
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vcm_tim->vcm_end_t.tv_usec = dw9718_dev->end_move_tv.tv_usec;
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dev_dbg(&client->dev, "dw9718_get_move_res 0x%lx, 0x%lx, 0x%lx, 0x%lx\n",
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vcm_tim->vcm_start_t.tv_sec,
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vcm_tim->vcm_start_t.tv_usec,
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vcm_tim->vcm_end_t.tv_sec,
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vcm_tim->vcm_end_t.tv_usec);
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} else {
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dev_err(&client->dev,
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"cmd 0x%x not supported\n", cmd);
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return -EINVAL;
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}
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return ret;
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}
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#ifdef CONFIG_COMPAT
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static long dw9718_compat_ioctl32(struct v4l2_subdev *sd,
|
unsigned int cmd, unsigned long arg)
|
{
|
struct rk_cam_vcm_tim vcm_tim;
|
struct rk_cam_compat_vcm_tim compat_vcm_tim;
|
struct rk_cam_compat_vcm_tim __user *p32 = compat_ptr(arg);
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
long ret;
|
|
if (cmd == RK_VIDIOC_COMPAT_VCM_TIMEINFO) {
|
ret = dw9718_ioctl(sd, RK_VIDIOC_VCM_TIMEINFO, &vcm_tim);
|
compat_vcm_tim.vcm_start_t.tv_sec = vcm_tim.vcm_start_t.tv_sec;
|
compat_vcm_tim.vcm_start_t.tv_usec =
|
vcm_tim.vcm_start_t.tv_usec;
|
compat_vcm_tim.vcm_end_t.tv_sec = vcm_tim.vcm_end_t.tv_sec;
|
compat_vcm_tim.vcm_end_t.tv_usec = vcm_tim.vcm_end_t.tv_usec;
|
|
put_user(compat_vcm_tim.vcm_start_t.tv_sec,
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&p32->vcm_start_t.tv_sec);
|
put_user(compat_vcm_tim.vcm_start_t.tv_usec,
|
&p32->vcm_start_t.tv_usec);
|
put_user(compat_vcm_tim.vcm_end_t.tv_sec,
|
&p32->vcm_end_t.tv_sec);
|
put_user(compat_vcm_tim.vcm_end_t.tv_usec,
|
&p32->vcm_end_t.tv_usec);
|
} else {
|
dev_err(&client->dev,
|
"cmd 0x%x not supported\n", cmd);
|
return -EINVAL;
|
}
|
|
return ret;
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}
|
#endif
|
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static const struct v4l2_subdev_core_ops dw9718_core_ops = {
|
.ioctl = dw9718_ioctl,
|
#ifdef CONFIG_COMPAT
|
.compat_ioctl32 = dw9718_compat_ioctl32
|
#endif
|
};
|
|
static const struct v4l2_subdev_ops dw9718_ops = {
|
.core = &dw9718_core_ops,
|
};
|
|
static void dw9718_subdev_cleanup(struct dw9718_device *dw9718_dev)
|
{
|
v4l2_device_unregister_subdev(&dw9718_dev->sd);
|
v4l2_device_unregister(&dw9718_dev->vdev);
|
v4l2_ctrl_handler_free(&dw9718_dev->ctrls_vcm);
|
media_entity_cleanup(&dw9718_dev->sd.entity);
|
}
|
|
static int dw9718_init_controls(struct dw9718_device *dev_vcm)
|
{
|
struct v4l2_ctrl_handler *hdl = &dev_vcm->ctrls_vcm;
|
const struct v4l2_ctrl_ops *ops = &dw9718_vcm_ctrl_ops;
|
|
v4l2_ctrl_handler_init(hdl, 1);
|
|
v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FOCUS_ABSOLUTE,
|
0, VCMDRV_MAX_LOG, 1, VCMDRV_MAX_LOG);
|
|
if (hdl->error)
|
dev_err(dev_vcm->sd.dev, "%s fail error: 0x%x\n",
|
__func__, hdl->error);
|
dev_vcm->sd.ctrl_handler = hdl;
|
return hdl->error;
|
}
|
|
static int dw9718_probe(struct i2c_client *client,
|
const struct i2c_device_id *id)
|
{
|
struct device_node *np = of_node_get(client->dev.of_node);
|
struct dw9718_device *dw9718_dev;
|
int ret;
|
int current_distance;
|
unsigned int start_current;
|
unsigned int rated_current;
|
unsigned int step_mode;
|
unsigned int control_mode;
|
unsigned int sacdiv_mode;
|
struct v4l2_subdev *sd;
|
char facing[2];
|
|
dev_info(&client->dev, "probing...\n");
|
if (of_property_read_u32(np,
|
OF_CAMERA_VCMDRV_START_CURRENT,
|
(unsigned int *)&start_current)) {
|
start_current = DW9718_DEFAULT_START_CURRENT;
|
dev_info(&client->dev,
|
"could not get module %s from dts!\n",
|
OF_CAMERA_VCMDRV_START_CURRENT);
|
}
|
if (of_property_read_u32(np,
|
OF_CAMERA_VCMDRV_RATED_CURRENT,
|
(unsigned int *)&rated_current)) {
|
rated_current = DW9718_DEFAULT_RATED_CURRENT;
|
dev_info(&client->dev,
|
"could not get module %s from dts!\n",
|
OF_CAMERA_VCMDRV_RATED_CURRENT);
|
}
|
if (of_property_read_u32(np,
|
OF_CAMERA_VCMDRV_STEP_MODE,
|
(unsigned int *)&step_mode)) {
|
step_mode = DW9718_DEFAULT_STEP_MODE;
|
dev_info(&client->dev,
|
"could not get module %s from dts!\n",
|
OF_CAMERA_VCMDRV_STEP_MODE);
|
}
|
if (of_property_read_u32(np,
|
OF_CAMERA_VCMDRV_CONTROL_MODE,
|
(unsigned int *)&control_mode)) {
|
control_mode = VCMDRV_DEFAULT_CONTROL_MODE;
|
dev_info(&client->dev,
|
"could not get module %s from dts!\n",
|
OF_CAMERA_VCMDRV_CONTROL_MODE);
|
}
|
if (of_property_read_u32(np,
|
OF_CAMERA_VCMDRV_SACDIV_MODE,
|
(unsigned int *)&sacdiv_mode)) {
|
sacdiv_mode = VCMDRV_DEFAULT_SACDIV_MODE;
|
dev_info(&client->dev,
|
"could not get module %s from dts!\n",
|
OF_CAMERA_VCMDRV_SACDIV_MODE);
|
}
|
|
dw9718_dev = devm_kzalloc(&client->dev, sizeof(*dw9718_dev),
|
GFP_KERNEL);
|
if (dw9718_dev == NULL)
|
return -ENOMEM;
|
|
ret = of_property_read_u32(np, RKMODULE_CAMERA_MODULE_INDEX,
|
&dw9718_dev->module_index);
|
ret |= of_property_read_string(np, RKMODULE_CAMERA_MODULE_FACING,
|
&dw9718_dev->module_facing);
|
if (ret) {
|
dev_err(&client->dev,
|
"could not get module information!\n");
|
return -EINVAL;
|
}
|
|
v4l2_i2c_subdev_init(&dw9718_dev->sd, client, &dw9718_ops);
|
dw9718_dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
|
dw9718_dev->sd.internal_ops = &dw9718_int_ops;
|
|
ret = dw9718_init_controls(dw9718_dev);
|
if (ret)
|
goto err_cleanup;
|
|
ret = media_entity_pads_init(&dw9718_dev->sd.entity, 0, NULL);
|
if (ret < 0)
|
goto err_cleanup;
|
|
sd = &dw9718_dev->sd;
|
sd->entity.function = MEDIA_ENT_F_LENS;
|
|
memset(facing, 0, sizeof(facing));
|
if (strcmp(dw9718_dev->module_facing, "back") == 0)
|
facing[0] = 'b';
|
else
|
facing[0] = 'f';
|
|
snprintf(sd->name, sizeof(sd->name), "m%02d_%s_%s %s",
|
dw9718_dev->module_index, facing,
|
DW9718_NAME, dev_name(sd->dev));
|
ret = v4l2_async_register_subdev(sd);
|
if (ret)
|
dev_err(&client->dev, "v4l2 async register subdev failed\n");
|
|
current_distance = rated_current - start_current;
|
current_distance = current_distance * DW9718_MAX_REG /
|
DW9718_MAX_CURRENT;
|
dw9718_dev->step = (current_distance + (VCMDRV_MAX_LOG - 1)) /
|
VCMDRV_MAX_LOG;
|
dw9718_dev->start_current = start_current * DW9718_MAX_REG /
|
DW9718_MAX_CURRENT;
|
dw9718_dev->rated_current = dw9718_dev->start_current +
|
VCMDRV_MAX_LOG *
|
dw9718_dev->step;
|
dw9718_dev->step_mode = step_mode;
|
dw9718_dev->move_us = 0;
|
dw9718_dev->current_related_pos = VCMDRV_MAX_LOG;
|
dw9718_dev->start_move_tv = ns_to_timeval(ktime_get_ns());
|
dw9718_dev->end_move_tv = ns_to_timeval(ktime_get_ns());
|
|
switch (control_mode) {
|
case 0:
|
dev_err(&client->dev, "control_mode is derect mode, not support\n");
|
return -EINVAL;
|
case 1:
|
dw9718_dev->mv_time_per_pos = (126 + step_mode * 2) * dw9718_dev->step;
|
dev_dbg(&client->dev, "control_mode is LSC mode\n");
|
break;
|
case 2:
|
case 3:
|
case 4:
|
case 5:
|
case 6:
|
case 7:
|
dw9718_dev->mv_time_per_pos = (6300 + step_mode * 100);
|
dev_dbg(&client->dev, "control_mode is LSC mode\n");
|
break;
|
default:
|
dev_err(&client->dev, "set unknown control_mode\n");
|
return -EINVAL;
|
}
|
|
switch (sacdiv_mode) {
|
case 0:
|
dw9718_dev->mv_time_per_pos *= 2;
|
dev_dbg(&client->dev, "sacdiv_mode is %d\n", sacdiv_mode);
|
break;
|
case 1:
|
dev_dbg(&client->dev, "sacdiv_mode is %d\n", sacdiv_mode);
|
break;
|
case 2:
|
dw9718_dev->mv_time_per_pos /= 2;
|
dev_dbg(&client->dev, "sacdiv_mode is %d\n", sacdiv_mode);
|
break;
|
case 3:
|
dw9718_dev->mv_time_per_pos /= 4;
|
dev_dbg(&client->dev, "sacdiv_mode is %d\n", sacdiv_mode);
|
break;
|
default:
|
dev_err(&client->dev, "set unknown control_mode\n");
|
return -EINVAL;
|
}
|
|
pm_runtime_set_active(&client->dev);
|
pm_runtime_enable(&client->dev);
|
pm_runtime_idle(&client->dev);
|
|
dev_info(&client->dev, "probing successful\n");
|
|
return 0;
|
|
err_cleanup:
|
dw9718_subdev_cleanup(dw9718_dev);
|
dev_err(&client->dev, "Probe failed: %d\n", ret);
|
return ret;
|
}
|
|
static int dw9718_remove(struct i2c_client *client)
|
{
|
struct v4l2_subdev *sd = i2c_get_clientdata(client);
|
struct dw9718_device *dw9718_dev = sd_to_dw9718_vcm(sd);
|
|
pm_runtime_disable(&client->dev);
|
dw9718_subdev_cleanup(dw9718_dev);
|
|
return 0;
|
}
|
|
static int __maybe_unused dw9718_vcm_suspend(struct device *dev)
|
{
|
return 0;
|
}
|
|
static int __maybe_unused dw9718_vcm_resume(struct device *dev)
|
{
|
return 0;
|
}
|
|
static const struct i2c_device_id dw9718_id_table[] = {
|
{ DW9718_NAME, 0 },
|
{ { 0 } }
|
};
|
MODULE_DEVICE_TABLE(i2c, dw9718_id_table);
|
|
static const struct of_device_id dw9718_of_table[] = {
|
{ .compatible = "dongwoon,dw9718" },
|
{ { 0 } }
|
};
|
MODULE_DEVICE_TABLE(of, dw9718_of_table);
|
|
static const struct dev_pm_ops dw9718_pm_ops = {
|
SET_SYSTEM_SLEEP_PM_OPS(dw9718_vcm_suspend, dw9718_vcm_resume)
|
SET_RUNTIME_PM_OPS(dw9718_vcm_suspend, dw9718_vcm_resume, NULL)
|
};
|
|
static struct i2c_driver dw9718_i2c_driver = {
|
.driver = {
|
.name = DW9718_NAME,
|
.pm = &dw9718_pm_ops,
|
.of_match_table = dw9718_of_table,
|
},
|
.probe = &dw9718_probe,
|
.remove = &dw9718_remove,
|
.id_table = dw9718_id_table,
|
};
|
|
module_i2c_driver(dw9718_i2c_driver);
|
|
MODULE_DESCRIPTION("DW9718 VCM driver");
|
MODULE_LICENSE("GPL v2");
|
