| 1 | // SPDX-License-Identifier: GPL-2.0-only |
|---|
| 2 | /* |
|---|
| 3 | * LEDs driver for the "User LED" on Routerboard532 |
|---|
| 4 | * |
|---|
| 5 | * Copyright (C) 2009 Phil Sutter <n0-1@freewrt.org> |
|---|
| 6 | * |
|---|
| 7 | * Based on leds-cobalt-qube.c by Florian Fainelly and |
|---|
| 8 | * rb-diag.c (my own standalone driver for both LED and |
|---|
| 9 | * button of Routerboard532). |
|---|
| 10 | */ |
|---|
| 11 | |
|---|
| 12 | #include <linux/leds.h> |
|---|
| 13 | #include <linux/module.h> |
|---|
| 14 | #include <linux/platform_device.h> |
|---|
| 15 | |
|---|
| 16 | #include <asm/mach-rc32434/gpio.h> |
|---|
| 17 | #include <asm/mach-rc32434/rb.h> |
|---|
| 18 | |
|---|
| 19 | static void rb532_led_set(struct led_classdev *cdev, |
|---|
| 20 | enum led_brightness brightness) |
|---|
| 21 | { |
|---|
| 22 | if (brightness) |
|---|
| 23 | set_latch_u5(LO_ULED, 0); |
|---|
| 24 | else |
|---|
| 25 | set_latch_u5(0, LO_ULED); |
|---|
| 26 | } |
|---|
| 27 | |
|---|
| 28 | static enum led_brightness rb532_led_get(struct led_classdev *cdev) |
|---|
| 29 | { |
|---|
| 30 | return (get_latch_u5() & LO_ULED) ? LED_FULL : LED_OFF; |
|---|
| 31 | } |
|---|
| 32 | |
|---|
| 33 | static struct led_classdev rb532_uled = { |
|---|
| 34 | .name = "uled" , |
|---|
| 35 | .brightness_set = rb532_led_set, |
|---|
| 36 | .brightness_get = rb532_led_get, |
|---|
| 37 | .default_trigger = "nand-disk" , |
|---|
| 38 | }; |
|---|
| 39 | |
|---|
| 40 | static int rb532_led_probe(struct platform_device *pdev) |
|---|
| 41 | { |
|---|
| 42 | return led_classdev_register(parent: &pdev->dev, led_cdev: &rb532_uled); |
|---|
| 43 | } |
|---|
| 44 | |
|---|
| 45 | static void rb532_led_remove(struct platform_device *pdev) |
|---|
| 46 | { |
|---|
| 47 | led_classdev_unregister(led_cdev: &rb532_uled); |
|---|
| 48 | } |
|---|
| 49 | |
|---|
| 50 | static struct platform_driver rb532_led_driver = { |
|---|
| 51 | .probe = rb532_led_probe, |
|---|
| 52 | .remove_new = rb532_led_remove, |
|---|
| 53 | .driver = { |
|---|
| 54 | .name = "rb532-led" , |
|---|
| 55 | }, |
|---|
| 56 | }; |
|---|
| 57 | |
|---|
| 58 | module_platform_driver(rb532_led_driver); |
|---|
| 59 | |
|---|
| 60 | MODULE_LICENSE("GPL" ); |
|---|
| 61 | MODULE_DESCRIPTION("User LED support for Routerboard532" ); |
|---|
| 62 | MODULE_AUTHOR("Phil Sutter <n0-1@freewrt.org>" ); |
|---|
| 63 | MODULE_ALIAS("platform:rb532-led" ); |
|---|
| 64 | |
|---|
