projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 3dd6b990 BW |
2 | * Driver for the LED found on the EBSA110 machine |
| 3 | * Based on Versatile and RealView machine LED code | |
| 1da177e4 | 4 | * |
| 3dd6b990 BW |
5 | * License terms: GNU General Public License (GPL) version 2 |
| 6 | * Author: Bryan Wu <bryan.wu@canonical.com> | |
| 1da177e4 | 7 | */ |
| 3dd6b990 | 8 | #include <linux/kernel.h> |
| 1da177e4 | 9 | #include <linux/init.h> |
| 3dd6b990 BW |
10 | #include <linux/io.h> |
| 11 | #include <linux/slab.h> | |
| 12 | #include <linux/leds.h> | |
| 1da177e4 | 13 | |
| 1da177e4 LT |
14 | #include <asm/mach-types.h> |
| 15 | ||
| bcbbf908 RK |
16 | #include "core.h" |
| 17 | ||
| 3dd6b990 BW |
18 | #if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS) |
| 19 | static void ebsa110_led_set(struct led_classdev *cdev, | |
| 20 | enum led_brightness b) | |
| 1da177e4 | 21 | { |
| 3dd6b990 | 22 | u8 reg = __raw_readb(SOFT_BASE); |
| 1da177e4 | 23 | |
| 3dd6b990 BW |
24 | if (b != LED_OFF) |
| 25 | reg |= 0x80; | |
| 26 | else | |
| 27 | reg &= ~0x80; | |
| 1da177e4 | 28 | |
| 3dd6b990 BW |
29 | __raw_writeb(reg, SOFT_BASE); |
| 30 | } | |
| 1da177e4 | 31 | |
| 3dd6b990 BW |
32 | static enum led_brightness ebsa110_led_get(struct led_classdev *cdev) |
| 33 | { | |
| 34 | u8 reg = __raw_readb(SOFT_BASE); | |
| 1da177e4 | 35 | |
| 3dd6b990 | 36 | return (reg & 0x80) ? LED_FULL : LED_OFF; |
| 1da177e4 LT |
37 | } |
| 38 | ||
| 3dd6b990 | 39 | static int __init ebsa110_leds_init(void) |
| 1da177e4 | 40 | { |
| 3dd6b990 BW |
41 | |
| 42 | struct led_classdev *cdev; | |
| 43 | int ret; | |
| 44 | ||
| 45 | if (!machine_is_ebsa110()) | |
| 46 | return -ENODEV; | |
| 47 | ||
| 48 | cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); | |
| 49 | if (!cdev) | |
| 50 | return -ENOMEM; | |
| 51 | ||
| 52 | cdev->name = "ebsa110:0"; | |
| 53 | cdev->brightness_set = ebsa110_led_set; | |
| 54 | cdev->brightness_get = ebsa110_led_get; | |
| 55 | cdev->default_trigger = "heartbeat"; | |
| 56 | ||
| 57 | ret = led_classdev_register(NULL, cdev); | |
| 58 | if (ret < 0) { | |
| 59 | kfree(cdev); | |
| 60 | return ret; | |
| 61 | } | |
| 1da177e4 LT |
62 | |
| 63 | return 0; | |
| 64 | } | |
| 65 | ||
| 3dd6b990 BW |
66 | /* |
| 67 | * Since we may have triggers on any subsystem, defer registration | |
| 68 | * until after subsystem_init. | |
| 69 | */ | |
| 70 | fs_initcall(ebsa110_leds_init); | |
| 71 | #endif |