程序注解

rgf

求大神给下面的程序做注解，请稍详细些，谢谢。
, J/ B. j5 ^8 x) d2 S8 q#include <linux/init.h>
#include <linux/module.h>
4 H/ R, f( X  i$ v#include <linux/kernel.h>
: Q! n2 R" ^/ q( ?# u#include <linux/types.h>
#include <linux/gpio.h>
#include <linux/leds.h>
#include <linux/platform_device.h>

+ f6 Y0 z- |0 ?7 _; T  ]#include <asm/mach-types.h>
/ m1 i. y* V& c/ I6 J4 |8 K#include <asm/mach/arch.h>
& K" C8 ]8 g" |; A( X% b#include <mach/da8xx.h>
* c8 @' u2 S* T6 [#include <mach/mux.h>
" M3 M( d0 S5 Q& M( d# U
#define DA850_USER_LED0        GPIO_TO_PIN(0, 0)
#define DA850_USER_LED1        GPIO_TO_PIN(0, 5)
7 J6 I/ ~) f5 t#define DA850_USER_LED2        GPIO_TO_PIN(0, 1)
' t$ b2 F9 f8 y$ j; B5 K$ K#define DA850_USER_LED3        GPIO_TO_PIN(0, 2)

0 A( U+ e. h9 }; ~+ o/* 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,
# i7 t( I4 r) a$ `# j4 R! p        -1
};
3 l- @# `5 X1 |, \* f: p
. N/ A& b" }( }static struct gpio_led da850_evm_tl_leds[] = {
- B5 @% F) }/ N1 s* k        {
5 l& D6 ~- G- x2 M                .active_low = 0,
& D2 L2 Z" r9 i                .gpio = DA850_USER_LED0,
                .name = "user_led0",
                .default_trigger = "default-on",
7 ~0 I& f$ G# \- n) L6 W9 }        },
7 o5 C3 q, ]2 {3 J        {
/ Z$ W: B( A4 q                .active_low = 0,
                .gpio = DA850_USER_LED1,
. y. @# X/ D' t! K1 g                .name = "user_led1",
  o* y# g  \! x( `/ Z5 M  x                .default_trigger = "default-on",
$ K' n8 r! j& H8 N; ]) [        },
        {
                .active_low = 0,
                .gpio = DA850_USER_LED2,
                .name = "user_led2",
                .default_trigger = "default-on",
        },
        {
7 n' \: S" h# k& L3 K4 |8 V                .active_low = 0,
                .gpio = DA850_USER_LED3,
2 ^& A1 k% y6 {, o! ]& D+ [                .name = "user_led3",
& Q$ Y$ P" O0 C+ r                .default_trigger = "default-on",
        },
# t0 ^! u, ?4 ~8 @};
, W" _- A3 n4 |& j; R" z, k
. @% U7 C: I6 xstatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {
! i  Y1 V* U( Y        .leds = da850_evm_tl_leds,
9 z. N4 r4 ]' ^0 }8 T        .num_leds = ARRAY_SIZE(da850_evm_tl_leds),
, N) Z  s) W! V/ B& j& F};
. a* E5 E0 L  t( d
; ^0 x/ b! I9 c9 rstatic void led_dev_release(struct device *dev)
{
( w5 J. H% I8 A, w6 C4 J};

static struct platform_device da850_evm_tl_leds_device = {
        .name                = "leds-gpio",
# R3 U& e4 i& p        .id                = 1,
        .dev = {
& q) `4 N+ ?9 ]9 t" }                .platform_data = &da850_evm_tl_leds_pdata,
                .release = led_dev_release,
        }
};
+ Q. @/ ~  F/ l3 h- }( D* }1 ?) G
4 g/ x" T# U, l2 @static int __init led_platform_init(void)
" \4 Y' m1 p  u" D3 o{
        int ret;
" A# H$ u6 b, E! `#if 0
        ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
1 y$ @3 e2 K4 L        if (ret)
                pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
6 P: F; [) F3 Y1 A) n4 B5 v0 P                                "%d\n", ret);
" v# j$ s3 L1 x6 t, v& w#endif
        ret = platform_device_register(&da850_evm_tl_leds_device);
        if (ret)
( ^- d$ c7 J1 X" {1 ]                pr_warning("Could not register som GPIO expander LEDS");
        else
                printk(KERN_INFO "LED register sucessful!\n");
/ }5 X: D, N9 ?6 i1 r; t: J, D- \
        return ret;
  A) @& c4 _: }7 n! B/ M! l" j}

static void __exit led_platform_exit(void)
{
( P5 B7 \; X; m+ a        platform_device_unregister(&da850_evm_tl_leds_device);
0 U$ n1 P3 p! K' `; E$ N) {  E2 b
        printk(KERN_INFO "LED unregister!\n");
1 \' e3 q- [# B0 O; A) w}
- `6 W! q7 S  H, [8 a& {/ u
module_init(led_platform_init);
module_exit(led_platform_exit);

1 v% J* S* \) z0 HMODULE_DESCRIPTION("Led platform driver");
MODULE_AUTHOR("Tronlong");
2 H" H- Y( Z5 CMODULE_LICENSE("GPL");