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(&pdev->dev, &rb532_uled); 43 } 44 45 static int rb532_led_remove(struct platform_device *pdev) 46 { 47 led_classdev_unregister(&rb532_uled); 48 return 0; 49 } 50 51 static struct platform_driver rb532_led_driver = { 52 .probe = rb532_led_probe, 53 .remove = rb532_led_remove, 54 .driver = { 55 .name = "rb532-led", 56 }, 57 }; 58 59 module_platform_driver(rb532_led_driver); 60 61 MODULE_LICENSE("GPL"); 62 MODULE_DESCRIPTION("User LED support for Routerboard532"); 63 MODULE_AUTHOR("Phil Sutter <n0-1@freewrt.org>"); 64 MODULE_ALIAS("platform:rb532-led"); 65