1 // SPDX-License-Identifier: GPL-2.0-or-later
26 static int adp5520_bl_set(struct backlight_device *bl, int brightness)  in adp5520_bl_set()  argument
28 	struct adp5520_bl *data = bl_get_data(bl);  in adp5520_bl_set()
29 	struct device *master = data->master;  in adp5520_bl_set()
32 	if (data->pdata->en_ambl_sens) {  in adp5520_bl_set()
41 			 * MAX_BRIGHTNESS -> Enable Ambient Light auto adjust  in adp5520_bl_set()
45 					 data->cached_daylight_max);  in adp5520_bl_set()
53 	if (data->current_brightness && brightness == 0)  in adp5520_bl_set()
56 	else if (data->current_brightness == 0 && brightness)  in adp5520_bl_set()
61 		data->current_brightness = brightness;  in adp5520_bl_set()
66 static int adp5520_bl_update_status(struct backlight_device *bl)  in adp5520_bl_update_status()  argument
68 	return adp5520_bl_set(bl, backlight_get_brightness(bl));  in adp5520_bl_update_status()
71 static int adp5520_bl_get_brightness(struct backlight_device *bl)  in adp5520_bl_get_brightness()  argument
73 	struct adp5520_bl *data = bl_get_data(bl);  in adp5520_bl_get_brightness()
77 	error = adp5520_read(data->master, ADP5520_BL_VALUE, &reg_val);  in adp5520_bl_get_brightness()
79 	return error ? data->current_brightness : reg_val;  in adp5520_bl_get_brightness()
87 static int adp5520_bl_setup(struct backlight_device *bl)  in adp5520_bl_setup()  argument
89 	struct adp5520_bl *data = bl_get_data(bl);  in adp5520_bl_setup()
90 	struct device *master = data->master;  in adp5520_bl_setup()
91 	struct adp5520_backlight_platform_data *pdata = data->pdata;  in adp5520_bl_setup()
95 				pdata->l1_daylight_max);  in adp5520_bl_setup()
97 				pdata->l1_daylight_dim);  in adp5520_bl_setup()
99 	if (pdata->en_ambl_sens) {  in adp5520_bl_setup()
100 		data->cached_daylight_max = pdata->l1_daylight_max;  in adp5520_bl_setup()
102 				pdata->l2_office_max);  in adp5520_bl_setup()
104 				pdata->l2_office_dim);  in adp5520_bl_setup()
106 				pdata->l3_dark_max);  in adp5520_bl_setup()
108 				pdata->l3_dark_dim);  in adp5520_bl_setup()
110 				pdata->l2_trip);  in adp5520_bl_setup()
112 				pdata->l2_hyst);  in adp5520_bl_setup()
114 				 pdata->l3_trip);  in adp5520_bl_setup()
116 				pdata->l3_hyst);  in adp5520_bl_setup()
118 				ALS_CMPR_CFG_VAL(pdata->abml_filt,  in adp5520_bl_setup()
123 			BL_CTRL_VAL(pdata->fade_led_law,  in adp5520_bl_setup()
124 					pdata->en_ambl_sens));  in adp5520_bl_setup()
126 	ret |= adp5520_write(master, ADP5520_BL_FADE, FADE_VAL(pdata->fade_in,  in adp5520_bl_setup()
127 			pdata->fade_out));  in adp5520_bl_setup()
141 	mutex_lock(&data->lock);  in adp5520_show()
142 	ret = adp5520_read(data->master, reg, &reg_val);  in adp5520_show()
143 	mutex_unlock(&data->lock);  in adp5520_show()
162 	mutex_lock(&data->lock);  in adp5520_store()
163 	adp5520_write(data->master, reg, val);  in adp5520_store()
164 	mutex_unlock(&data->lock);  in adp5520_store()
212 	ret = kstrtoul(buf, 10, &data->cached_daylight_max);  in adp5520_bl_daylight_max_store()
283 	struct backlight_device *bl;  in adp5520_bl_probe()  local
287 	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);  in adp5520_bl_probe()
289 		return -ENOMEM;  in adp5520_bl_probe()
291 	data->master = pdev->dev.parent;  in adp5520_bl_probe()
292 	data->pdata = dev_get_platdata(&pdev->dev);  in adp5520_bl_probe()
294 	if (data->pdata  == NULL) {  in adp5520_bl_probe()
295 		dev_err(&pdev->dev, "missing platform data\n");  in adp5520_bl_probe()
296 		return -ENODEV;  in adp5520_bl_probe()
299 	data->id = pdev->id;  in adp5520_bl_probe()
300 	data->current_brightness = 0;  in adp5520_bl_probe()
302 	mutex_init(&data->lock);  in adp5520_bl_probe()
307 	bl = devm_backlight_device_register(&pdev->dev, pdev->name,  in adp5520_bl_probe()
308 					data->master, data, &adp5520_bl_ops,  in adp5520_bl_probe()
310 	if (IS_ERR(bl)) {  in adp5520_bl_probe()
311 		dev_err(&pdev->dev, "failed to register backlight\n");  in adp5520_bl_probe()
312 		return PTR_ERR(bl);  in adp5520_bl_probe()
315 	bl->props.brightness = ADP5020_MAX_BRIGHTNESS;  in adp5520_bl_probe()
316 	if (data->pdata->en_ambl_sens)  in adp5520_bl_probe()
317 		ret = sysfs_create_group(&bl->dev.kobj,  in adp5520_bl_probe()
321 		dev_err(&pdev->dev, "failed to register sysfs\n");  in adp5520_bl_probe()
325 	platform_set_drvdata(pdev, bl);  in adp5520_bl_probe()
326 	ret = adp5520_bl_setup(bl);  in adp5520_bl_probe()
328 		dev_err(&pdev->dev, "failed to setup\n");  in adp5520_bl_probe()
329 		if (data->pdata->en_ambl_sens)  in adp5520_bl_probe()
330 			sysfs_remove_group(&bl->dev.kobj,  in adp5520_bl_probe()
335 	backlight_update_status(bl);  in adp5520_bl_probe()
342 	struct backlight_device *bl = platform_get_drvdata(pdev);  in adp5520_bl_remove()  local
343 	struct adp5520_bl *data = bl_get_data(bl);  in adp5520_bl_remove()
345 	adp5520_clr_bits(data->master, ADP5520_MODE_STATUS, ADP5520_BL_EN);  in adp5520_bl_remove()
347 	if (data->pdata->en_ambl_sens)  in adp5520_bl_remove()
348 		sysfs_remove_group(&bl->dev.kobj,  in adp5520_bl_remove()
355 	struct backlight_device *bl = dev_get_drvdata(dev);  in adp5520_bl_suspend()  local
357 	return adp5520_bl_set(bl, 0);  in adp5520_bl_suspend()
362 	struct backlight_device *bl = dev_get_drvdata(dev);  in adp5520_bl_resume()  local
364 	backlight_update_status(bl);  in adp5520_bl_resume()
374 		.name	= "adp5520-backlight",
386 MODULE_ALIAS("platform:adp5520-backlight");