1 // SPDX-License-Identifier: GPL-2.0-only
26 static int ep93xxbl_set(struct backlight_device *bl, int brightness)  in ep93xxbl_set()  argument
28 	struct ep93xxbl *ep93xxbl = bl_get_data(bl);  in ep93xxbl_set()
30 	writel((brightness << 8) | EP93XX_MAX_COUNT, ep93xxbl->mmio);  in ep93xxbl_set()
32 	ep93xxbl->brightness = brightness;  in ep93xxbl_set()
37 static int ep93xxbl_update_status(struct backlight_device *bl)  in ep93xxbl_update_status()  argument
39 	return ep93xxbl_set(bl, backlight_get_brightness(bl));  in ep93xxbl_update_status()
42 static int ep93xxbl_get_brightness(struct backlight_device *bl)  in ep93xxbl_get_brightness()  argument
44 	struct ep93xxbl *ep93xxbl = bl_get_data(bl);  in ep93xxbl_get_brightness()
46 	return ep93xxbl->brightness;  in ep93xxbl_get_brightness()
57 	struct backlight_device *bl;  in ep93xxbl_probe()  local
61 	ep93xxbl = devm_kzalloc(&dev->dev, sizeof(*ep93xxbl), GFP_KERNEL);  in ep93xxbl_probe()
63 		return -ENOMEM;  in ep93xxbl_probe()
67 		return -ENXIO;  in ep93xxbl_probe()
70 	 * FIXME - We don't do a request_mem_region here because we are  in ep93xxbl_probe()
72 	 * drivers/video/ep93xx-fb.c) and doing so will cause the second  in ep93xxbl_probe()
73 	 * loaded driver to return -EBUSY.  in ep93xxbl_probe()
78 	ep93xxbl->mmio = devm_ioremap(&dev->dev, res->start,  in ep93xxbl_probe()
80 	if (!ep93xxbl->mmio)  in ep93xxbl_probe()
81 		return -ENXIO;  in ep93xxbl_probe()
86 	bl = devm_backlight_device_register(&dev->dev, dev->name, &dev->dev,  in ep93xxbl_probe()
88 	if (IS_ERR(bl))  in ep93xxbl_probe()
89 		return PTR_ERR(bl);  in ep93xxbl_probe()
91 	bl->props.brightness = EP93XX_DEF_BRIGHT;  in ep93xxbl_probe()
93 	platform_set_drvdata(dev, bl);  in ep93xxbl_probe()
95 	ep93xxbl_update_status(bl);  in ep93xxbl_probe()
103 	struct backlight_device *bl = dev_get_drvdata(dev);  in ep93xxbl_suspend()  local
105 	return ep93xxbl_set(bl, 0);  in ep93xxbl_suspend()
110 	struct backlight_device *bl = dev_get_drvdata(dev);  in ep93xxbl_resume()  local
112 	backlight_update_status(bl);  in ep93xxbl_resume()
121 		.name	= "ep93xx-bl",
132 MODULE_ALIAS("platform:ep93xx-bl");