| 1 | // SPDX-License-Identifier: GPL-2.0-only |
|---|
| 2 | /* |
|---|
| 3 | * Copyright 2006 - Florian Fainelli <florian@openwrt.org> |
|---|
| 4 | * |
|---|
| 5 | * Control the Cobalt Qube/RaQ front LED |
|---|
| 6 | */ |
|---|
| 7 | #include <linux/io.h> |
|---|
| 8 | #include <linux/ioport.h> |
|---|
| 9 | #include <linux/leds.h> |
|---|
| 10 | #include <linux/module.h> |
|---|
| 11 | #include <linux/platform_device.h> |
|---|
| 12 | #include <linux/types.h> |
|---|
| 13 | |
|---|
| 14 | #define LED_FRONT_LEFT 0x01 |
|---|
| 15 | #define LED_FRONT_RIGHT 0x02 |
|---|
| 16 | |
|---|
| 17 | static void __iomem *led_port; |
|---|
| 18 | static u8 led_value; |
|---|
| 19 | |
|---|
| 20 | static void qube_front_led_set(struct led_classdev *led_cdev, |
|---|
| 21 | enum led_brightness brightness) |
|---|
| 22 | { |
|---|
| 23 | if (brightness) |
|---|
| 24 | led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT; |
|---|
| 25 | else |
|---|
| 26 | led_value = ~(LED_FRONT_LEFT | LED_FRONT_RIGHT); |
|---|
| 27 | writeb(val: led_value, addr: led_port); |
|---|
| 28 | } |
|---|
| 29 | |
|---|
| 30 | static struct led_classdev qube_front_led = { |
|---|
| 31 | .name = "qube::front" , |
|---|
| 32 | .brightness = LED_FULL, |
|---|
| 33 | .brightness_set = qube_front_led_set, |
|---|
| 34 | .default_trigger = "default-on" , |
|---|
| 35 | }; |
|---|
| 36 | |
|---|
| 37 | static int cobalt_qube_led_probe(struct platform_device *pdev) |
|---|
| 38 | { |
|---|
| 39 | struct resource *res; |
|---|
| 40 | |
|---|
| 41 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
|---|
| 42 | if (!res) |
|---|
| 43 | return -EBUSY; |
|---|
| 44 | |
|---|
| 45 | led_port = devm_ioremap(dev: &pdev->dev, offset: res->start, size: resource_size(res)); |
|---|
| 46 | if (!led_port) |
|---|
| 47 | return -ENOMEM; |
|---|
| 48 | |
|---|
| 49 | led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT; |
|---|
| 50 | writeb(val: led_value, addr: led_port); |
|---|
| 51 | |
|---|
| 52 | return devm_led_classdev_register(parent: &pdev->dev, led_cdev: &qube_front_led); |
|---|
| 53 | } |
|---|
| 54 | |
|---|
| 55 | static struct platform_driver cobalt_qube_led_driver = { |
|---|
| 56 | .probe = cobalt_qube_led_probe, |
|---|
| 57 | .driver = { |
|---|
| 58 | .name = "cobalt-qube-leds" , |
|---|
| 59 | }, |
|---|
| 60 | }; |
|---|
| 61 | |
|---|
| 62 | module_platform_driver(cobalt_qube_led_driver); |
|---|
| 63 | |
|---|
| 64 | MODULE_LICENSE("GPL" ); |
|---|
| 65 | MODULE_DESCRIPTION("Front LED support for Cobalt Server" ); |
|---|
| 66 | MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>" ); |
|---|
| 67 | MODULE_ALIAS("platform:cobalt-qube-leds" ); |
|---|
| 68 | |
|---|
