1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * lm3533-bl.c -- LM3533 Backlight driver
5  * Copyright (C) 2011-2012 Texas Instruments
34 static inline int lm3533_bl_get_ctrlbank_id(struct lm3533_bl *bl)  in lm3533_bl_get_ctrlbank_id()  argument
36 	return bl->id;  in lm3533_bl_get_ctrlbank_id()
41 	struct lm3533_bl *bl = bl_get_data(bd);  in lm3533_bl_update_status()  local
43 	return lm3533_ctrlbank_set_brightness(&bl->cb, backlight_get_brightness(bd));  in lm3533_bl_update_status()
48 	struct lm3533_bl *bl = bl_get_data(bd);  in lm3533_bl_get_brightness()  local
52 	ret = lm3533_ctrlbank_get_brightness(&bl->cb, &val);  in lm3533_bl_get_brightness()
67 	struct lm3533_bl *bl = dev_get_drvdata(dev);  in show_id()  local
69 	return scnprintf(buf, PAGE_SIZE, "%d\n", bl->id);  in show_id()
75 	struct lm3533_bl *bl = dev_get_drvdata(dev);  in show_als_channel()  local
76 	unsigned channel = lm3533_bl_get_ctrlbank_id(bl);  in show_als_channel()
84 	struct lm3533_bl *bl = dev_get_drvdata(dev);  in show_als_en()  local
85 	int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);  in show_als_en()
91 	ret = lm3533_read(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, &val);  in show_als_en()
105 	struct lm3533_bl *bl = dev_get_drvdata(dev);  in store_als_en()  local
106 	int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);  in store_als_en()
113 		return -EINVAL;  in store_als_en()
122 	ret = lm3533_update(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, val,  in store_als_en()
133 	struct lm3533_bl *bl = dev_get_drvdata(dev);  in show_linear()  local
139 	ret = lm3533_read(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, &val);  in show_linear()
143 	mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1);  in show_linear()
157 	struct lm3533_bl *bl = dev_get_drvdata(dev);  in store_linear()  local
164 		return -EINVAL;  in store_linear()
166 	mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1);  in store_linear()
173 	ret = lm3533_update(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, val,  in store_linear()
185 	struct lm3533_bl *bl = dev_get_drvdata(dev);  in show_pwm()  local
189 	ret = lm3533_ctrlbank_get_pwm(&bl->cb, &val);  in show_pwm()
200 	struct lm3533_bl *bl = dev_get_drvdata(dev);  in store_pwm()  local
205 		return -EINVAL;  in store_pwm()
207 	ret = lm3533_ctrlbank_set_pwm(&bl->cb, val);  in store_pwm()
233 	struct lm3533_bl *bl = dev_get_drvdata(dev);  in lm3533_bl_attr_is_visible()  local
234 	umode_t mode = attr->mode;  in lm3533_bl_attr_is_visible()
238 		if (!bl->lm3533->have_als)  in lm3533_bl_attr_is_visible()
250 static int lm3533_bl_setup(struct lm3533_bl *bl,  in lm3533_bl_setup()  argument
255 	ret = lm3533_ctrlbank_set_max_current(&bl->cb, pdata->max_current);  in lm3533_bl_setup()
259 	return lm3533_ctrlbank_set_pwm(&bl->cb, pdata->pwm);  in lm3533_bl_setup()
266 	struct lm3533_bl *bl;  in lm3533_bl_probe()  local
271 	dev_dbg(&pdev->dev, "%s\n", __func__);  in lm3533_bl_probe()
273 	lm3533 = dev_get_drvdata(pdev->dev.parent);  in lm3533_bl_probe()
275 		return -EINVAL;  in lm3533_bl_probe()
277 	pdata = dev_get_platdata(&pdev->dev);  in lm3533_bl_probe()
279 		dev_err(&pdev->dev, "no platform data\n");  in lm3533_bl_probe()
280 		return -EINVAL;  in lm3533_bl_probe()
283 	if (pdev->id < 0 || pdev->id >= LM3533_HVCTRLBANK_COUNT) {  in lm3533_bl_probe()
284 		dev_err(&pdev->dev, "illegal backlight id %d\n", pdev->id);  in lm3533_bl_probe()
285 		return -EINVAL;  in lm3533_bl_probe()
288 	bl = devm_kzalloc(&pdev->dev, sizeof(*bl), GFP_KERNEL);  in lm3533_bl_probe()
289 	if (!bl)  in lm3533_bl_probe()
290 		return -ENOMEM;  in lm3533_bl_probe()
292 	bl->lm3533 = lm3533;  in lm3533_bl_probe()
293 	bl->id = pdev->id;  in lm3533_bl_probe()
295 	bl->cb.lm3533 = lm3533;  in lm3533_bl_probe()
296 	bl->cb.id = lm3533_bl_get_ctrlbank_id(bl);  in lm3533_bl_probe()
297 	bl->cb.dev = NULL;			/* until registered */  in lm3533_bl_probe()
302 	props.brightness = pdata->default_brightness;  in lm3533_bl_probe()
303 	bd = devm_backlight_device_register(&pdev->dev, pdata->name,  in lm3533_bl_probe()
304 					pdev->dev.parent, bl, &lm3533_bl_ops,  in lm3533_bl_probe()
307 		dev_err(&pdev->dev, "failed to register backlight device\n");  in lm3533_bl_probe()
311 	bl->bd = bd;  in lm3533_bl_probe()
312 	bl->cb.dev = &bl->bd->dev;  in lm3533_bl_probe()
314 	platform_set_drvdata(pdev, bl);  in lm3533_bl_probe()
316 	ret = sysfs_create_group(&bd->dev.kobj, &lm3533_bl_attribute_group);  in lm3533_bl_probe()
318 		dev_err(&pdev->dev, "failed to create sysfs attributes\n");  in lm3533_bl_probe()
324 	ret = lm3533_bl_setup(bl, pdata);  in lm3533_bl_probe()
328 	ret = lm3533_ctrlbank_enable(&bl->cb);  in lm3533_bl_probe()
335 	sysfs_remove_group(&bd->dev.kobj, &lm3533_bl_attribute_group);  in lm3533_bl_probe()
342 	struct lm3533_bl *bl = platform_get_drvdata(pdev);  in lm3533_bl_remove()  local
343 	struct backlight_device *bd = bl->bd;  in lm3533_bl_remove()
345 	dev_dbg(&bd->dev, "%s\n", __func__);  in lm3533_bl_remove()
347 	bd->props.power = FB_BLANK_POWERDOWN;  in lm3533_bl_remove()
348 	bd->props.brightness = 0;  in lm3533_bl_remove()
350 	lm3533_ctrlbank_disable(&bl->cb);  in lm3533_bl_remove()
351 	sysfs_remove_group(&bd->dev.kobj, &lm3533_bl_attribute_group);  in lm3533_bl_remove()
357 	struct lm3533_bl *bl = dev_get_drvdata(dev);  in lm3533_bl_suspend()  local
361 	return lm3533_ctrlbank_disable(&bl->cb);  in lm3533_bl_suspend()
366 	struct lm3533_bl *bl = dev_get_drvdata(dev);  in lm3533_bl_resume()  local
370 	return lm3533_ctrlbank_enable(&bl->cb);  in lm3533_bl_resume()
378 	struct lm3533_bl *bl = platform_get_drvdata(pdev);  in lm3533_bl_shutdown()  local
380 	dev_dbg(&pdev->dev, "%s\n", __func__);  in lm3533_bl_shutdown()
382 	lm3533_ctrlbank_disable(&bl->cb);  in lm3533_bl_shutdown()
387 		.name	= "lm3533-backlight",
399 MODULE_ALIAS("platform:lm3533-backlight");