56 static int ad5820_write(struct ad5820_device *coil, u16 data)  in ad5820_write()  argument
58 	struct i2c_client *client = v4l2_get_subdevdata(&coil->subdev);  in ad5820_write()
86 static int ad5820_update_hw(struct ad5820_device *coil)  in ad5820_update_hw()  argument
90 	status = RAMP_US_TO_CODE(coil->focus_ramp_time);  in ad5820_update_hw()
91 	status |= coil->focus_ramp_mode  in ad5820_update_hw()
93 	status |= coil->focus_absolute << AD5820_DAC_SHIFT;  in ad5820_update_hw()
95 	if (coil->standby)  in ad5820_update_hw()
98 	return ad5820_write(coil, status);  in ad5820_update_hw()
104 static int ad5820_power_off(struct ad5820_device *coil, bool standby)  in ad5820_power_off()  argument
113 		coil->standby = true;  in ad5820_power_off()
114 		ret = ad5820_update_hw(coil);  in ad5820_power_off()
117 	ret2 = regulator_disable(coil->vana);  in ad5820_power_off()
123 static int ad5820_power_on(struct ad5820_device *coil, bool restore)  in ad5820_power_on()  argument
127 	ret = regulator_enable(coil->vana);  in ad5820_power_on()
133 		coil->standby = false;  in ad5820_power_on()
134 		ret = ad5820_update_hw(coil);  in ad5820_power_on()
141 	coil->standby = true;  in ad5820_power_on()
142 	regulator_disable(coil->vana);  in ad5820_power_on()
152 	struct ad5820_device *coil =  in ad5820_set_ctrl()  local
157 		coil->focus_absolute = ctrl->val;  in ad5820_set_ctrl()
158 		return ad5820_update_hw(coil);  in ad5820_set_ctrl()
169 static int ad5820_init_controls(struct ad5820_device *coil)  in ad5820_init_controls()  argument
171 	v4l2_ctrl_handler_init(&coil->ctrls, 1);  in ad5820_init_controls()
185 	v4l2_ctrl_new_std(&coil->ctrls, &ad5820_ctrl_ops,  in ad5820_init_controls()
188 	if (coil->ctrls.error)  in ad5820_init_controls()
189 		return coil->ctrls.error;  in ad5820_init_controls()
191 	coil->focus_absolute = 0;  in ad5820_init_controls()
192 	coil->focus_ramp_time = 0;  in ad5820_init_controls()
193 	coil->focus_ramp_mode = 0;  in ad5820_init_controls()
195 	coil->subdev.ctrl_handler = &coil->ctrls;  in ad5820_init_controls()
205 	struct ad5820_device *coil = to_ad5820_device(subdev);  in ad5820_registered()  local
207 	return ad5820_init_controls(coil);  in ad5820_registered()
213 	struct ad5820_device *coil = to_ad5820_device(subdev);  in ad5820_set_power()  local
216 	mutex_lock(&coil->power_lock);  in ad5820_set_power()
222 	if (coil->power_count == !on) {  in ad5820_set_power()
223 		ret = on ? ad5820_power_on(coil, true) :  in ad5820_set_power()
224 			ad5820_power_off(coil, true);  in ad5820_set_power()
230 	coil->power_count += on ? 1 : -1;  in ad5820_set_power()
231 	WARN_ON(coil->power_count < 0);  in ad5820_set_power()
234 	mutex_unlock(&coil->power_lock);  in ad5820_set_power()
269 	struct ad5820_device *coil = to_ad5820_device(subdev);  in ad5820_suspend()  local
271 	if (!coil->power_count)  in ad5820_suspend()
274 	return ad5820_power_off(coil, false);  in ad5820_suspend()
281 	struct ad5820_device *coil = to_ad5820_device(subdev);  in ad5820_resume()  local
283 	if (!coil->power_count)  in ad5820_resume()
286 	return ad5820_power_on(coil, true);  in ad5820_resume()
292 	struct ad5820_device *coil;  in ad5820_probe()  local
295 	coil = devm_kzalloc(&client->dev, sizeof(*coil), GFP_KERNEL);  in ad5820_probe()
296 	if (!coil)  in ad5820_probe()
299 	coil->vana = devm_regulator_get(&client->dev, "VANA");  in ad5820_probe()
300 	if (IS_ERR(coil->vana)) {  in ad5820_probe()
301 		ret = PTR_ERR(coil->vana);  in ad5820_probe()
307 	mutex_init(&coil->power_lock);  in ad5820_probe()
309 	v4l2_i2c_subdev_init(&coil->subdev, client, &ad5820_ops);  in ad5820_probe()
310 	coil->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;  in ad5820_probe()
311 	coil->subdev.internal_ops = &ad5820_internal_ops;  in ad5820_probe()
312 	strscpy(coil->subdev.name, "ad5820 focus", sizeof(coil->subdev.name));  in ad5820_probe()
314 	ret = media_entity_pads_init(&coil->subdev.entity, 0, NULL);  in ad5820_probe()
318 	ret = v4l2_async_register_subdev(&coil->subdev);  in ad5820_probe()
325 	mutex_destroy(&coil->power_lock);  in ad5820_probe()
327 	media_entity_cleanup(&coil->subdev.entity);  in ad5820_probe()
334 	struct ad5820_device *coil = to_ad5820_device(subdev);  in ad5820_remove()  local
336 	v4l2_async_unregister_subdev(&coil->subdev);  in ad5820_remove()
337 	v4l2_ctrl_handler_free(&coil->ctrls);  in ad5820_remove()
338 	media_entity_cleanup(&coil->subdev.entity);  in ad5820_remove()
339 	mutex_destroy(&coil->power_lock);  in ad5820_remove()