程序注解

rgf

求大神给下面的程序做注解，请稍详细些，谢谢。
6 M) E9 G' D7 A0 Z#include <linux/init.h>
" i8 S1 C6 J/ Z2 V" j  J#include <linux/module.h>
! [) A# f, H2 n* A3 @: F#include <linux/kernel.h>
#include <linux/types.h>
4 K. P1 P7 S4 J6 K' [0 E% r; Z#include <linux/gpio.h>
, Z6 h! ^) m! p; [#include <linux/leds.h>
#include <linux/platform_device.h>
. K  X4 L( O" G/ k  t
; m: G7 {+ v  _3 C" R& i#include <asm/mach-types.h>
: i5 ~+ g4 ^  {& l! [' H#include <asm/mach/arch.h>
# M* A) I0 e% j4 R! G#include <mach/da8xx.h>
#include <mach/mux.h>

#define DA850_USER_LED0        GPIO_TO_PIN(0, 0)
* A: S0 m: s& |% g/ Q$ o1 O( `2 j#define DA850_USER_LED1        GPIO_TO_PIN(0, 5)
#define DA850_USER_LED2        GPIO_TO_PIN(0, 1)
#define DA850_USER_LED3        GPIO_TO_PIN(0, 2)
! W, |/ u, {+ f% Y) M- T, s/ B
9 S3 O: |" V. X  T2 f% x* H/* assign the tl som board LED-GPIOs*/
( S& y+ e0 v, b0 R1 j/ j4 Pstatic const short da850_evm_tl_user_led_pins[] = {
        /* These pins are definition at <mach/mux.h> file */
        DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,
        -1
( _  o. ~/ t) B/ [};

static struct gpio_led da850_evm_tl_leds[] = {
        {
                .active_low = 0,
+ V, ~9 w3 P7 d$ j( U5 \                .gpio = DA850_USER_LED0,
3 W% l  G- o* i9 Z' w                .name = "user_led0",
1 u& Y) y; V& @                .default_trigger = "default-on",
        },
        {
9 l1 g8 J3 r# k$ V, @                .active_low = 0,
: z) h3 M7 N# g% [$ M- d& P                .gpio = DA850_USER_LED1,
& I, `: K, ?  q; `2 j% ^5 u                .name = "user_led1",
                .default_trigger = "default-on",
        },
        {
/ z$ V8 _! ]4 y7 x                .active_low = 0,
8 D7 L$ D$ X, R' J- J+ ?" Y0 ~- W; N                .gpio = DA850_USER_LED2,
4 L' s1 G+ J! z1 y                .name = "user_led2",
" y/ x8 x  x; _: d( X: p  o                .default_trigger = "default-on",
        },
        {
                .active_low = 0,
                .gpio = DA850_USER_LED3,
                .name = "user_led3",
( W) {$ O, W9 W# K- E/ ~" C                .default_trigger = "default-on",
( y$ w* t& @" W$ q' A        },
};
# I9 K5 J, O' S4 `. z3 n
: G( J# D: ~- ~% astatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {
        .leds = da850_evm_tl_leds,
        .num_leds = ARRAY_SIZE(da850_evm_tl_leds),
) @" |* Y1 I# F};
5 k( z7 A2 r0 k' f0 R
8 I% B: @, t9 N- m. n3 |static void led_dev_release(struct device *dev)
! ]: Y4 l) V6 r{
0 H: M! j& |* d) S# p5 P9 f};
0 r* S4 g0 B7 {3 [! ]
1 A" U. F2 G1 J5 w, Cstatic struct platform_device da850_evm_tl_leds_device = {
        .name                = "leds-gpio",
        .id                = 1,
7 C7 N4 n" W' [0 [/ B        .dev = {
! Z; m6 V. c  p4 y- o8 h                .platform_data = &da850_evm_tl_leds_pdata,
! U: X6 L6 L6 A. M! o& ?- ?/ \) `                .release = led_dev_release,
9 e7 O' L7 i) i5 R/ `# V1 C/ G5 Z        }
};

static int __init led_platform_init(void)
/ b3 a, G; P9 x$ t4 W{
        int ret;
#if 0
2 ^' `' E& Z  _/ B+ p8 E        ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
2 P% H7 v' H% E, T- _        if (ret)
6 q7 V& H6 |0 V                pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
                                "%d\n", ret);
0 h( D0 Z0 L' C4 J" D' ]#endif
        ret = platform_device_register(&da850_evm_tl_leds_device);
  d6 Q3 K( A% c' s# F" m        if (ret)
+ ^# D- t  L6 n& G; @$ r                pr_warning("Could not register som GPIO expander LEDS");
        else
6 T% P% _/ d9 K' e+ X                printk(KERN_INFO "LED register sucessful!\n");
2 b3 T9 \! G9 ^
        return ret;
( f- u7 i; F+ ?1 `) n* {}
8 U% ?$ n6 _  \
( ~% G7 Q2 B. c* a5 @/ c  zstatic void __exit led_platform_exit(void)
{
        platform_device_unregister(&da850_evm_tl_leds_device);

! E( L$ e* E9 p: i& I: m        printk(KERN_INFO "LED unregister!\n");
8 V% ^- q9 F! c}
7 }8 ?/ c( s  K0 P: e
module_init(led_platform_init);
module_exit(led_platform_exit);

MODULE_DESCRIPTION("Led platform driver");
MODULE_AUTHOR("Tronlong");
MODULE_LICENSE("GPL");

( d/ w/ s6 k6 s, ~# z