1 // SPDX-License-Identifier: GPL-2.0
3 * LED Driver for SGI Octane machines
6 #include <linux/module.h>
7 #include <linux/kernel.h>
8 #include <linux/platform_device.h>
9 #include <linux/leds.h>
11 #define IP30_LED_SYSTEM 0
12 #define IP30_LED_FAULT 1
15 struct led_classdev cdev;
19 static void ip30led_set(struct led_classdev *led_cdev,
20 enum led_brightness value)
22 struct ip30_led *led = container_of(led_cdev, struct ip30_led, cdev);
24 writel(value, led->reg);
27 static int ip30led_create(struct platform_device *pdev, int num)
30 struct ip30_led *data;
32 res = platform_get_resource(pdev, IORESOURCE_MEM, num);
36 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
40 data->reg = devm_ioremap_resource(&pdev->dev, res);
41 if (IS_ERR(data->reg))
42 return PTR_ERR(data->reg);
47 data->cdev.name = "white:power";
50 data->cdev.name = "red:fault";
56 data->cdev.brightness = readl(data->reg);
57 data->cdev.max_brightness = 1;
58 data->cdev.brightness_set = ip30led_set;
60 return devm_led_classdev_register(&pdev->dev, &data->cdev);
63 static int ip30led_probe(struct platform_device *pdev)
67 ret = ip30led_create(pdev, IP30_LED_SYSTEM);
71 return ip30led_create(pdev, IP30_LED_FAULT);
74 static struct platform_driver ip30led_driver = {
75 .probe = ip30led_probe,
81 module_platform_driver(ip30led_driver);
83 MODULE_AUTHOR("Thomas Bogendoerfer <tbogendoerfer@suse.de>");
84 MODULE_DESCRIPTION("SGI Octane LED driver");
85 MODULE_LICENSE("GPL");
86 MODULE_ALIAS("platform:ip30-leds");