Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) // Copyright (C) 2018 Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/pm_runtime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <media/v4l2-ctrls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <media/v4l2-device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #define AK7375_MAX_FOCUS_POS	4095
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * This sets the minimum granularity for the focus positions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * A value of 1 gives maximum accuracy for a desired focus position
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #define AK7375_FOCUS_STEPS	1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  * This acts as the minimum granularity of lens movement.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  * Keep this value power of 2, so the control steps can be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  * uniformly adjusted for gradual lens movement, with desired
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  * number of control steps.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define AK7375_CTRL_STEPS	64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define AK7375_CTRL_DELAY_US	1000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define AK7375_REG_POSITION	0x0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define AK7375_REG_CONT		0x2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #define AK7375_MODE_ACTIVE	0x0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define AK7375_MODE_STANDBY	0x40
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) /* ak7375 device structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) struct ak7375_device {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	struct v4l2_ctrl_handler ctrls_vcm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	struct v4l2_subdev sd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	struct v4l2_ctrl *focus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	/* active or standby mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	bool active;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) static inline struct ak7375_device *to_ak7375_vcm(struct v4l2_ctrl *ctrl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	return container_of(ctrl->handler, struct ak7375_device, ctrls_vcm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) static inline struct ak7375_device *sd_to_ak7375_vcm(struct v4l2_subdev *subdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	return container_of(subdev, struct ak7375_device, sd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) static int ak7375_i2c_write(struct ak7375_device *ak7375,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	u8 addr, u16 data, u8 size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	struct i2c_client *client = v4l2_get_subdevdata(&ak7375->sd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	u8 buf[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	if (size != 1 && size != 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	buf[0] = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	buf[size] = data & 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	if (size == 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		buf[1] = (data >> 8) & 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	ret = i2c_master_send(client, (const char *)buf, size + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	if (ret != size + 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) static int ak7375_set_ctrl(struct v4l2_ctrl *ctrl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	struct ak7375_device *dev_vcm = to_ak7375_vcm(ctrl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		return ak7375_i2c_write(dev_vcm, AK7375_REG_POSITION,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 					ctrl->val << 4, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) static const struct v4l2_ctrl_ops ak7375_vcm_ctrl_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	.s_ctrl = ak7375_set_ctrl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) static int ak7375_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	ret = pm_runtime_get_sync(sd->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		pm_runtime_put_noidle(sd->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static int ak7375_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	pm_runtime_put(sd->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static const struct v4l2_subdev_internal_ops ak7375_int_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	.open = ak7375_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	.close = ak7375_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) static const struct v4l2_subdev_ops ak7375_ops = { };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static void ak7375_subdev_cleanup(struct ak7375_device *ak7375_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	v4l2_async_unregister_subdev(&ak7375_dev->sd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	v4l2_ctrl_handler_free(&ak7375_dev->ctrls_vcm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	media_entity_cleanup(&ak7375_dev->sd.entity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static int ak7375_init_controls(struct ak7375_device *dev_vcm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	struct v4l2_ctrl_handler *hdl = &dev_vcm->ctrls_vcm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	const struct v4l2_ctrl_ops *ops = &ak7375_vcm_ctrl_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	v4l2_ctrl_handler_init(hdl, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	dev_vcm->focus = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FOCUS_ABSOLUTE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		0, AK7375_MAX_FOCUS_POS, AK7375_FOCUS_STEPS, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (hdl->error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		dev_err(dev_vcm->sd.dev, "%s fail error: 0x%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 			__func__, hdl->error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	dev_vcm->sd.ctrl_handler = hdl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	return hdl->error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) static int ak7375_probe(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	struct ak7375_device *ak7375_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	ak7375_dev = devm_kzalloc(&client->dev, sizeof(*ak7375_dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 				  GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	if (!ak7375_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	v4l2_i2c_subdev_init(&ak7375_dev->sd, client, &ak7375_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	ak7375_dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	ak7375_dev->sd.internal_ops = &ak7375_int_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	ak7375_dev->sd.entity.function = MEDIA_ENT_F_LENS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	ret = ak7375_init_controls(ak7375_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		goto err_cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	ret = media_entity_pads_init(&ak7375_dev->sd.entity, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		goto err_cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	ret = v4l2_async_register_subdev(&ak7375_dev->sd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		goto err_cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	pm_runtime_set_active(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	pm_runtime_enable(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	pm_runtime_idle(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) err_cleanup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	v4l2_ctrl_handler_free(&ak7375_dev->ctrls_vcm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	media_entity_cleanup(&ak7375_dev->sd.entity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) static int ak7375_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	struct v4l2_subdev *sd = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	struct ak7375_device *ak7375_dev = sd_to_ak7375_vcm(sd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	ak7375_subdev_cleanup(ak7375_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	pm_runtime_disable(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	pm_runtime_set_suspended(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)  * This function sets the vcm position, so it consumes least current
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)  * The lens position is gradually moved in units of AK7375_CTRL_STEPS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)  * to make the movements smoothly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static int __maybe_unused ak7375_vcm_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	struct i2c_client *client = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	struct v4l2_subdev *sd = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	struct ak7375_device *ak7375_dev = sd_to_ak7375_vcm(sd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	int ret, val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	if (!ak7375_dev->active)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	for (val = ak7375_dev->focus->val & ~(AK7375_CTRL_STEPS - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	     val >= 0; val -= AK7375_CTRL_STEPS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		ret = ak7375_i2c_write(ak7375_dev, AK7375_REG_POSITION,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 				       val << 4, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 			dev_err_once(dev, "%s I2C failure: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 				     __func__, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		usleep_range(AK7375_CTRL_DELAY_US, AK7375_CTRL_DELAY_US + 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	ret = ak7375_i2c_write(ak7375_dev, AK7375_REG_CONT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 			       AK7375_MODE_STANDBY, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		dev_err(dev, "%s I2C failure: %d\n", __func__, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	ak7375_dev->active = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)  * This function sets the vcm position to the value set by the user
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)  * through v4l2_ctrl_ops s_ctrl handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)  * The lens position is gradually moved in units of AK7375_CTRL_STEPS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)  * to make the movements smoothly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) static int __maybe_unused ak7375_vcm_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	struct i2c_client *client = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	struct v4l2_subdev *sd = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	struct ak7375_device *ak7375_dev = sd_to_ak7375_vcm(sd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	int ret, val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	if (ak7375_dev->active)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	ret = ak7375_i2c_write(ak7375_dev, AK7375_REG_CONT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		AK7375_MODE_ACTIVE, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		dev_err(dev, "%s I2C failure: %d\n", __func__, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	for (val = ak7375_dev->focus->val % AK7375_CTRL_STEPS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	     val <= ak7375_dev->focus->val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	     val += AK7375_CTRL_STEPS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		ret = ak7375_i2c_write(ak7375_dev, AK7375_REG_POSITION,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 				       val << 4, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 			dev_err_ratelimited(dev, "%s I2C failure: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 						__func__, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		usleep_range(AK7375_CTRL_DELAY_US, AK7375_CTRL_DELAY_US + 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	ak7375_dev->active = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) static const struct of_device_id ak7375_of_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	{ .compatible = "asahi-kasei,ak7375" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	{ /* sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) MODULE_DEVICE_TABLE(of, ak7375_of_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) static const struct dev_pm_ops ak7375_pm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	SET_SYSTEM_SLEEP_PM_OPS(ak7375_vcm_suspend, ak7375_vcm_resume)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	SET_RUNTIME_PM_OPS(ak7375_vcm_suspend, ak7375_vcm_resume, NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) static struct i2c_driver ak7375_i2c_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		.name = "ak7375",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		.pm = &ak7375_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		.of_match_table = ak7375_of_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	.probe_new = ak7375_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	.remove = ak7375_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) module_i2c_driver(ak7375_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) MODULE_AUTHOR("Tianshu Qiu <tian.shu.qiu@intel.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) MODULE_AUTHOR("Bingbu Cao <bingbu.cao@intel.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) MODULE_DESCRIPTION("AK7375 VCM driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) MODULE_LICENSE("GPL v2");