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 25 else 26 set_latch_u5(0, LO_ULED); 27 } 28 29 static enum led_brightness rb532_led_get(struct led_classdev *cdev) 30 { 31 return (get_latch_u5() & LO_ULED) ? LED_FULL : LED_OFF; 32 } 33 34 static struct led_classdev rb532_uled = { 35 .name = "uled", 36 .brightness_set = rb532_led_set, 37 .brightness_get = rb532_led_get, 38 .default_trigger = "nand-disk", 39 }; 40 41 static int rb532_led_probe(struct platform_device *pdev) 42 { 43 return led_classdev_register(&pdev->dev, &rb532_uled); 44 } 45 46 static int rb532_led_remove(struct platform_device *pdev) 47 { 48 led_classdev_unregister(&rb532_uled); 49 return 0; 50 } 51 52 static struct platform_driver rb532_led_driver = { 53 .probe = rb532_led_probe, 54 .remove = rb532_led_remove, 55 .driver = { 56 .name = "rb532-led", 57 }, 58 }; 59 60 module_platform_driver(rb532_led_driver); 61 62 MODULE_LICENSE("GPL"); 63 MODULE_DESCRIPTION("User LED support for Routerboard532"); 64 MODULE_AUTHOR("Phil Sutter <n0-1@freewrt.org>"); 65 MODULE_ALIAS("platform:rb532-led"); 66