1 // SPDX-License-Identifier: GPL-2.0-only
8  * Copyright (C) 2006-2008 Marvell International Ltd.
40 static int da903x_backlight_set(struct backlight_device *bl, int brightness)  in da903x_backlight_set()  argument
42 	struct da903x_backlight_data *data = bl_get_data(bl);  in da903x_backlight_set()
43 	struct device *dev = data->da903x_dev;  in da903x_backlight_set()
47 	switch (data->id) {  in da903x_backlight_set()
54 		if (data->current_brightness && brightness == 0)  in da903x_backlight_set()
59 		if (data->current_brightness == 0 && brightness)  in da903x_backlight_set()
74 	data->current_brightness = brightness;  in da903x_backlight_set()
78 static int da903x_backlight_update_status(struct backlight_device *bl)  in da903x_backlight_update_status()  argument
80 	return da903x_backlight_set(bl, backlight_get_brightness(bl));  in da903x_backlight_update_status()
83 static int da903x_backlight_get_brightness(struct backlight_device *bl)  in da903x_backlight_get_brightness()  argument
85 	struct da903x_backlight_data *data = bl_get_data(bl);  in da903x_backlight_get_brightness()
87 	return data->current_brightness;  in da903x_backlight_get_brightness()
98 	struct da9034_backlight_pdata *pdata = dev_get_platdata(&pdev->dev);  in da903x_backlight_probe()
100 	struct backlight_device *bl;  in da903x_backlight_probe()  local
104 	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);  in da903x_backlight_probe()
106 		return -ENOMEM;  in da903x_backlight_probe()
108 	switch (pdev->id) {  in da903x_backlight_probe()
116 		dev_err(&pdev->dev, "invalid backlight device ID(%d)\n",  in da903x_backlight_probe()
117 				pdev->id);  in da903x_backlight_probe()
118 		return -EINVAL;  in da903x_backlight_probe()
121 	data->id = pdev->id;  in da903x_backlight_probe()
122 	data->da903x_dev = pdev->dev.parent;  in da903x_backlight_probe()
123 	data->current_brightness = 0;  in da903x_backlight_probe()
127 		da903x_write(data->da903x_dev, DA9034_WLED_CONTROL2,  in da903x_backlight_probe()
128 				DA9034_WLED_ISET(pdata->output_current));  in da903x_backlight_probe()
133 	bl = devm_backlight_device_register(&pdev->dev, pdev->name,  in da903x_backlight_probe()
134 					data->da903x_dev, data,  in da903x_backlight_probe()
136 	if (IS_ERR(bl)) {  in da903x_backlight_probe()
137 		dev_err(&pdev->dev, "failed to register backlight\n");  in da903x_backlight_probe()
138 		return PTR_ERR(bl);  in da903x_backlight_probe()
141 	bl->props.brightness = max_brightness;  in da903x_backlight_probe()
143 	platform_set_drvdata(pdev, bl);  in da903x_backlight_probe()
144 	backlight_update_status(bl);  in da903x_backlight_probe()
150 		.name	= "da903x-backlight",
161 MODULE_ALIAS("platform:da903x-backlight");