57 static int ad5820_write(struct ad5820_device *coil, u16 data)  in ad5820_write()  argument
59 	struct i2c_client *client = v4l2_get_subdevdata(&coil->subdev);  in ad5820_write()
87 static int ad5820_update_hw(struct ad5820_device *coil)  in ad5820_update_hw()  argument
91 	status = RAMP_US_TO_CODE(coil->focus_ramp_time);  in ad5820_update_hw()
92 	status |= coil->focus_ramp_mode  in ad5820_update_hw()
94 	status |= coil->focus_absolute << AD5820_DAC_SHIFT;  in ad5820_update_hw()
96 	if (coil->standby)  in ad5820_update_hw()
99 	return ad5820_write(coil, status);  in ad5820_update_hw()
105 static int ad5820_power_off(struct ad5820_device *coil, bool standby)  in ad5820_power_off()  argument
114 		coil->standby = true;  in ad5820_power_off()
115 		ret = ad5820_update_hw(coil);  in ad5820_power_off()
118 	gpiod_set_value_cansleep(coil->enable_gpio, 0);  in ad5820_power_off()
120 	ret2 = regulator_disable(coil->vana);  in ad5820_power_off()
126 static int ad5820_power_on(struct ad5820_device *coil, bool restore)  in ad5820_power_on()  argument
130 	ret = regulator_enable(coil->vana);  in ad5820_power_on()
134 	gpiod_set_value_cansleep(coil->enable_gpio, 1);  in ad5820_power_on()
138 		coil->standby = false;  in ad5820_power_on()
139 		ret = ad5820_update_hw(coil);  in ad5820_power_on()
146 	gpiod_set_value_cansleep(coil->enable_gpio, 0);  in ad5820_power_on()
147 	coil->standby = true;  in ad5820_power_on()
148 	regulator_disable(coil->vana);  in ad5820_power_on()
158 	struct ad5820_device *coil =  in ad5820_set_ctrl()  local
163 		coil->focus_absolute = ctrl->val;  in ad5820_set_ctrl()
164 		return ad5820_update_hw(coil);  in ad5820_set_ctrl()
175 static int ad5820_init_controls(struct ad5820_device *coil)  in ad5820_init_controls()  argument
177 	v4l2_ctrl_handler_init(&coil->ctrls, 1);  in ad5820_init_controls()
191 	v4l2_ctrl_new_std(&coil->ctrls, &ad5820_ctrl_ops,  in ad5820_init_controls()
194 	if (coil->ctrls.error)  in ad5820_init_controls()
195 		return coil->ctrls.error;  in ad5820_init_controls()
197 	coil->focus_absolute = 0;  in ad5820_init_controls()
198 	coil->focus_ramp_time = 0;  in ad5820_init_controls()
199 	coil->focus_ramp_mode = 0;  in ad5820_init_controls()
201 	coil->subdev.ctrl_handler = &coil->ctrls;  in ad5820_init_controls()
211 	struct ad5820_device *coil = to_ad5820_device(subdev);  in ad5820_registered()  local
213 	return ad5820_init_controls(coil);  in ad5820_registered()
219 	struct ad5820_device *coil = to_ad5820_device(subdev);  in ad5820_set_power()  local
222 	mutex_lock(&coil->power_lock);  in ad5820_set_power()
228 	if (coil->power_count == !on) {  in ad5820_set_power()
229 		ret = on ? ad5820_power_on(coil, true) :  in ad5820_set_power()
230 			ad5820_power_off(coil, true);  in ad5820_set_power()
236 	coil->power_count += on ? 1 : -1;  in ad5820_set_power()
237 	WARN_ON(coil->power_count < 0);  in ad5820_set_power()
240 	mutex_unlock(&coil->power_lock);  in ad5820_set_power()
274 	struct ad5820_device *coil = to_ad5820_device(subdev);  in ad5820_suspend()  local
276 	if (!coil->power_count)  in ad5820_suspend()
279 	return ad5820_power_off(coil, false);  in ad5820_suspend()
285 	struct ad5820_device *coil = to_ad5820_device(subdev);  in ad5820_resume()  local
287 	if (!coil->power_count)  in ad5820_resume()
290 	return ad5820_power_on(coil, true);  in ad5820_resume()
295 	struct ad5820_device *coil;  in ad5820_probe()  local
298 	coil = devm_kzalloc(&client->dev, sizeof(*coil), GFP_KERNEL);  in ad5820_probe()
299 	if (!coil)  in ad5820_probe()
302 	coil->vana = devm_regulator_get(&client->dev, "VANA");  in ad5820_probe()
303 	if (IS_ERR(coil->vana))  in ad5820_probe()
304 		return dev_err_probe(&client->dev, PTR_ERR(coil->vana),  in ad5820_probe()
307 	coil->enable_gpio = devm_gpiod_get_optional(&client->dev, "enable",  in ad5820_probe()
309 	if (IS_ERR(coil->enable_gpio))  in ad5820_probe()
310 		return dev_err_probe(&client->dev, PTR_ERR(coil->enable_gpio),  in ad5820_probe()
313 	mutex_init(&coil->power_lock);  in ad5820_probe()
315 	v4l2_i2c_subdev_init(&coil->subdev, client, &ad5820_ops);  in ad5820_probe()
316 	coil->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;  in ad5820_probe()
317 	coil->subdev.internal_ops = &ad5820_internal_ops;  in ad5820_probe()
318 	coil->subdev.entity.function = MEDIA_ENT_F_LENS;  in ad5820_probe()
319 	strscpy(coil->subdev.name, "ad5820 focus", sizeof(coil->subdev.name));  in ad5820_probe()
321 	ret = media_entity_pads_init(&coil->subdev.entity, 0, NULL);  in ad5820_probe()
325 	ret = v4l2_async_register_subdev(&coil->subdev);  in ad5820_probe()
332 	media_entity_cleanup(&coil->subdev.entity);  in ad5820_probe()
334 	mutex_destroy(&coil->power_lock);  in ad5820_probe()
341 	struct ad5820_device *coil = to_ad5820_device(subdev);  in ad5820_remove()  local
343 	v4l2_async_unregister_subdev(&coil->subdev);  in ad5820_remove()
344 	v4l2_ctrl_handler_free(&coil->ctrls);  in ad5820_remove()
345 	media_entity_cleanup(&coil->subdev.entity);  in ad5820_remove()
346 	mutex_destroy(&coil->power_lock);  in ad5820_remove()