程序注解

rgf

求大神给下面的程序做注解，请稍详细些，谢谢。
#include <linux/init.h>
#include <linux/module.h>
% w# T' B* H6 M! V( p#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/gpio.h>
  t' Q0 D4 w# h; X# G$ \, u, h9 i#include <linux/leds.h>
5 j& [. F. L3 f#include <linux/platform_device.h>

#include <asm/mach-types.h>
: S5 S8 k+ g$ V, s! e9 W) N#include <asm/mach/arch.h>
#include <mach/da8xx.h>
#include <mach/mux.h>

#define DA850_USER_LED0        GPIO_TO_PIN(0, 0)
#define DA850_USER_LED1        GPIO_TO_PIN(0, 5)
6 h0 U% z3 i2 ^3 x6 b#define DA850_USER_LED2        GPIO_TO_PIN(0, 1)
#define DA850_USER_LED3        GPIO_TO_PIN(0, 2)

/* assign the tl som board LED-GPIOs*/
8 W; K5 i7 D5 C) E7 X7 |: i$ n  Gstatic const short da850_evm_tl_user_led_pins[] = {
7 A) m5 Z& P1 C% w; A' u8 d/ ^3 n        /* These pins are definition at <mach/mux.h> file */
; |; w- U- B$ \0 C, o: }        DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,
        -1
; N- J  e8 v* h$ _0 s};
6 ~% h) w' F; \" [
static struct gpio_led da850_evm_tl_leds[] = {
        {
, t9 q6 U; h* H6 o- _! T* w                .active_low = 0,
                .gpio = DA850_USER_LED0,
+ {+ D, l) ~+ ?& j4 D1 }4 [                .name = "user_led0",
# P) ^; C/ m% l2 ?, X3 E% @+ c                .default_trigger = "default-on",
        },
* V# f+ Y) c+ h7 R" w; c7 k, t        {
                .active_low = 0,
                .gpio = DA850_USER_LED1,
                .name = "user_led1",
                .default_trigger = "default-on",
        },
8 j' e+ E  T4 z$ r        {
                .active_low = 0,
                .gpio = DA850_USER_LED2,
2 x) _* D' N' k* @                .name = "user_led2",
$ @+ Z$ F5 g- m8 d8 O& r7 C                .default_trigger = "default-on",
) z/ m5 v* N( i        },
! l7 p0 P) R$ n7 j        {
                .active_low = 0,
                .gpio = DA850_USER_LED3,
                .name = "user_led3",
6 n( Z4 d3 u" z% Y. l                .default_trigger = "default-on",
        },
+ U- Z1 T% P2 |$ M};

2 m, c1 h# X/ z: fstatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {
        .leds = da850_evm_tl_leds,
" [) N" \' S( T7 @  g8 M1 I        .num_leds = ARRAY_SIZE(da850_evm_tl_leds),
};
5 |* j: }' W& D. w+ E* {
( S* E* g/ [; Z* m5 [! Tstatic void led_dev_release(struct device *dev)
8 B# Q. Q( V& \4 g8 l1 n{
6 [' x0 r' t& @  H; T8 G};

; Q7 ~* v) I5 Ostatic struct platform_device da850_evm_tl_leds_device = {
        .name                = "leds-gpio",
        .id                = 1,
8 V+ ?% _, Z' R2 {, f        .dev = {
4 c1 R; i8 T- h' K6 |& F& P2 c: O                .platform_data = &da850_evm_tl_leds_pdata,
8 C8 l# ^. {% z; s+ o                .release = led_dev_release,
1 z& b0 ?/ |( l, R8 ?) [0 |        }
};

' I- W! p- z+ A. Z7 r7 Y3 Kstatic int __init led_platform_init(void)
{
9 s1 H7 F& p6 f8 ^  c        int ret;
#if 0
        ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
        if (ret)
                pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
                                "%d\n", ret);
8 ^5 \1 ~) k& z#endif
        ret = platform_device_register(&da850_evm_tl_leds_device);
# b$ a. [  w9 |        if (ret)
" W; C% I3 j+ J) y                pr_warning("Could not register som GPIO expander LEDS");
$ c) G& n3 d" U+ l* n& Z        else
3 d4 v2 \3 b1 |* S                printk(KERN_INFO "LED register sucessful!\n");
( \" ?9 N7 ^, w$ o
        return ret;
# L" A8 m  b" o% s3 @4 O: A}

: V  M, m  N; h1 M, bstatic void __exit led_platform_exit(void)
( ^" A/ C% v! ~7 y4 B/ \; F! C& P6 I{
        platform_device_unregister(&da850_evm_tl_leds_device);

        printk(KERN_INFO "LED unregister!\n");
}

- q2 ]1 N3 S+ L3 J* l8 s& P: imodule_init(led_platform_init);
1 ]" S- G3 B( L! U1 Ymodule_exit(led_platform_exit);
7 ?. y# @1 i4 B: G4 a
; M, V5 b8 b) {- z1 {, dMODULE_DESCRIPTION("Led platform driver");
MODULE_AUTHOR("Tronlong");
MODULE_LICENSE("GPL");