程序注解

rgf

求大神给下面的程序做注解，请稍详细些，谢谢。
, T8 f5 r9 X* V5 K4 D1 @#include <linux/init.h>
#include <linux/module.h>
% f/ h: Q  ~) U% D# v& C1 n- B* p#include <linux/kernel.h>
! }( |+ F$ o' {+ r* b% a#include <linux/types.h>
8 z, o4 A( y) y* h+ @& G, c( i#include <linux/gpio.h>
7 J$ |+ u7 ~; V' g/ L! A#include <linux/leds.h>
' n8 p* x6 {1 M1 ]: x9 N5 w$ t* }#include <linux/platform_device.h>

#include <asm/mach-types.h>
8 x$ a& w. e' w$ x: S: U8 y#include <asm/mach/arch.h>
) J- T& B8 x) S- w* O9 u9 u& Z- V, @#include <mach/da8xx.h>
/ f9 W$ P' p5 L: J#include <mach/mux.h>
7 m- }/ H6 f; L( Q: F
#define DA850_USER_LED0        GPIO_TO_PIN(0, 0)
#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)

, H# M9 q7 _4 o6 j/* assign the tl som board LED-GPIOs*/
static 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,
' S4 t! J# t3 C5 U- \        -1
# b+ Z% x. L% ^. |};

, J3 P" Q; v4 p6 E; ?! r' a" wstatic struct gpio_led da850_evm_tl_leds[] = {
: x* W/ p2 {; O& o6 v        {
                .active_low = 0,
                .gpio = DA850_USER_LED0,
                .name = "user_led0",
8 C: j+ D/ Y; J4 X) E0 j$ r  Y- X                .default_trigger = "default-on",
7 I5 j1 I- |9 \        },
        {
                .active_low = 0,
0 G* N& H. m+ X% \                .gpio = DA850_USER_LED1,
0 |8 I7 t3 P$ i/ i- F                .name = "user_led1",
5 c9 h% \, s/ Z                .default_trigger = "default-on",
. f' r7 d5 k3 h        },
        {
! g8 T% j1 ^: G8 K                .active_low = 0,
3 x' p0 C8 r1 j* V7 J+ _3 j4 V                .gpio = DA850_USER_LED2,
                .name = "user_led2",
" i& G2 a! r. N. C# W$ M                .default_trigger = "default-on",
        },
2 m. `% Q( K6 X        {
, M; m$ _4 F2 D. {- m+ F                .active_low = 0,
3 G2 i/ C8 z# O                .gpio = DA850_USER_LED3,
6 Y! L1 J3 I* ^) y& o. ]                .name = "user_led3",
                .default_trigger = "default-on",
        },
! d) {2 ^/ ]4 T};

- e8 k3 H" p! ]* Pstatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {
        .leds = da850_evm_tl_leds,
. `/ m' s4 l3 P% a) O. ^1 x/ ~7 |        .num_leds = ARRAY_SIZE(da850_evm_tl_leds),
6 u( g$ Z5 c- n2 q% g' Y8 C};
! D3 J% N  G4 C; m
5 g% T/ |. W, j9 e2 C) ^static void led_dev_release(struct device *dev)
{
};
+ c3 |  Z" e1 ?. D' w* e1 S
$ N' p( }# Z; P2 Ustatic struct platform_device da850_evm_tl_leds_device = {
: o5 c) ^1 Y! w4 v% R, P        .name                = "leds-gpio",
        .id                = 1,
+ E' ]+ G: V& n( d1 q5 v        .dev = {
                .platform_data = &da850_evm_tl_leds_pdata,
$ y5 f+ p8 P, j# G4 w" B6 t                .release = led_dev_release,
        }
9 t) L2 }( r% G+ [6 |$ {};
" ^+ R" l5 Y9 ]6 _0 F6 T
: y. e2 `3 `8 vstatic int __init led_platform_init(void)
{
2 q( L# g: \  q1 K- `8 I( Q        int ret;
7 c% G) T1 {# c) Y2 ~#if 0
        ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
) ?' i' @6 a* k' c* `        if (ret)
                pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
                                "%d\n", ret);
#endif
        ret = platform_device_register(&da850_evm_tl_leds_device);
        if (ret)
                pr_warning("Could not register som GPIO expander LEDS");
        else
& g8 M8 d) P( R0 K$ B) C! [                printk(KERN_INFO "LED register sucessful!\n");
0 K7 w% z" e  M" a
0 ^" L% z9 [7 N" [! H        return ret;
}

( d3 F# w" c! r% Y2 Sstatic void __exit led_platform_exit(void)
; J, i5 I  t; f7 d& H9 b$ u6 _{
        platform_device_unregister(&da850_evm_tl_leds_device);
- G% s0 |; a$ |
        printk(KERN_INFO "LED unregister!\n");
$ w5 G1 A. R' r4 j2 E# u, S& H! S}
7 {; y) `/ r# z7 \
module_init(led_platform_init);
module_exit(led_platform_exit);
2 C  @1 z* m$ i4 i
MODULE_DESCRIPTION("Led platform driver");
MODULE_AUTHOR("Tronlong");
MODULE_LICENSE("GPL");

4 o6 d& H9 f+ L) B0 ]4 D