程序注解

rgf

求大神给下面的程序做注解，请稍详细些，谢谢。
" O3 Z; X7 g  j#include <linux/init.h>
+ @. C" U2 l* ?5 C" I#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
, J; E! }6 o8 D8 J* t2 }#include <linux/gpio.h>
. d3 N: A7 D" U: q2 t#include <linux/leds.h>
#include <linux/platform_device.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>
4 y3 O1 o- G! s  i; f  B#include <mach/da8xx.h>
#include <mach/mux.h>
( o' G- ~% R% W# q. v5 k
3 x# G2 q2 u! A' A% R#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)
2 c2 s' s" |% g5 w9 y7 j
/* assign the tl som board LED-GPIOs*/
- P$ p: W& }: }! Z' t$ Q) O2 Tstatic const short da850_evm_tl_user_led_pins[] = {
        /* These pins are definition at <mach/mux.h> file */
& G3 I0 P7 q* h! l/ k% ]& ~        DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,
        -1
};

; p8 k6 [8 X& P* p8 f" ]. N$ pstatic struct gpio_led da850_evm_tl_leds[] = {
        {
                .active_low = 0,
                .gpio = DA850_USER_LED0,
                .name = "user_led0",
                .default_trigger = "default-on",
        },
5 W$ J# ^; \. ]1 b        {
# ]0 c' F8 `+ x/ ^0 H4 r; B4 m                .active_low = 0,
                .gpio = DA850_USER_LED1,
                .name = "user_led1",
                .default_trigger = "default-on",
        },
3 x2 ^& l% y! R& A8 L        {
9 f8 q' M+ c  V) u1 z% }! f                .active_low = 0,
9 \* u) ~# l, e  b. K& x1 ?- T                .gpio = DA850_USER_LED2,
                .name = "user_led2",
                .default_trigger = "default-on",
6 Q/ x0 s0 S( @, J$ K4 F        },
        {
                .active_low = 0,
5 J+ V! F, h& @  l% ?                .gpio = DA850_USER_LED3,
                .name = "user_led3",
                .default_trigger = "default-on",
: U* {1 d) R8 p        },
};

static struct gpio_led_platform_data da850_evm_tl_leds_pdata = {
- n# S  |9 y0 D5 V- F; U& f/ A) `        .leds = da850_evm_tl_leds,
        .num_leds = ARRAY_SIZE(da850_evm_tl_leds),
" H% i5 a: w" j1 y5 l& y" `% _};

static void led_dev_release(struct device *dev)
{
};

6 z- h+ _+ f1 d% w  o; Tstatic struct platform_device da850_evm_tl_leds_device = {
        .name                = "leds-gpio",
        .id                = 1,
        .dev = {
                .platform_data = &da850_evm_tl_leds_pdata,
+ C  Y9 P2 U: u. P! s                .release = led_dev_release,
) G3 }+ J8 X- `- d; f$ T1 h        }
" _1 ?% r! P5 b# D# T: E};
( i6 M  ^2 |6 |# d$ x# R
static int __init led_platform_init(void)
{
        int ret;
#if 0
, `3 P  s1 ~! _        ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
/ K0 w8 _$ G# V0 u& r$ {        if (ret)
8 a9 v( x4 n& l( i2 T! l                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)
9 [) I' ~  c% I$ U9 @, a4 M                pr_warning("Could not register som GPIO expander LEDS");
        else
                printk(KERN_INFO "LED register sucessful!\n");

        return ret;
+ M* L, X3 |" o( C. `" n) K  ?4 y}

static void __exit led_platform_exit(void)
{
        platform_device_unregister(&da850_evm_tl_leds_device);
5 M4 P9 ?% e+ J9 f* U0 d
        printk(KERN_INFO "LED unregister!\n");
}
9 c0 m- |) u6 p
module_init(led_platform_init);
module_exit(led_platform_exit);

7 S2 v) D$ u9 w( nMODULE_DESCRIPTION("Led platform driver");
2 H3 e0 K" O- i7 L; e& {9 ~MODULE_AUTHOR("Tronlong");
8 [+ B" ^6 y9 r5 Z6 h/ D7 @MODULE_LICENSE("GPL");