程序注解

rgf

求大神给下面的程序做注解，请稍详细些，谢谢。
+ t6 q( F; _! h8 [2 ?  \) u#include <linux/init.h>
$ h; O; y  e; w& s1 U8 e#include <linux/module.h>
: a, S) n/ c8 F1 ^0 _5 e; p+ k: d#include <linux/kernel.h>
  E  y1 a8 Q* @. l, K#include <linux/types.h>
) f; O! h. N7 {" [, m* h#include <linux/gpio.h>
#include <linux/leds.h>
) O; L" f, N7 h#include <linux/platform_device.h>

#include <asm/mach-types.h>
( _& @4 g8 N$ d# c) @#include <asm/mach/arch.h>
: z5 v3 S7 T! R; {- R#include <mach/da8xx.h>
$ `! q  u( h0 h! U3 L% K9 P#include <mach/mux.h>
; I! \' ^4 M2 H0 d' I7 r
#define DA850_USER_LED0        GPIO_TO_PIN(0, 0)
#define DA850_USER_LED1        GPIO_TO_PIN(0, 5)
) L! Q7 h) Q4 F5 l) Z) [# |9 ~#define DA850_USER_LED2        GPIO_TO_PIN(0, 1)
* N1 E  Z7 S6 n#define DA850_USER_LED3        GPIO_TO_PIN(0, 2)

/* 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,
& G! ~2 l5 [" e        -1
};

1 L4 s: E- O" {8 k; t8 M' astatic struct gpio_led da850_evm_tl_leds[] = {
        {
& w8 L' b* n/ w                .active_low = 0,
: {/ n8 O1 n6 F" @# m                .gpio = DA850_USER_LED0,
9 K, Y6 d/ ]+ h6 z                .name = "user_led0",
                .default_trigger = "default-on",
        },
$ _- d- H  x. y* J. @        {
                .active_low = 0,
                .gpio = DA850_USER_LED1,
                .name = "user_led1",
, Z1 Y2 j" [3 _  j                .default_trigger = "default-on",
        },
        {
                .active_low = 0,
3 `4 U7 u( k$ |$ {7 m4 x                .gpio = DA850_USER_LED2,
8 N  O0 t1 C. Q; b$ Z1 T                .name = "user_led2",
" B$ ]: m- H) ^) ^9 T5 P7 w                .default_trigger = "default-on",
0 B4 C3 W' b( A" `# ]/ E7 \6 f. h        },
: {0 T7 t1 r9 V- t/ I5 M/ a' ~        {
                .active_low = 0,
                .gpio = DA850_USER_LED3,
                .name = "user_led3",
                .default_trigger = "default-on",
        },
};
; ?9 I4 P7 _. k
static struct gpio_led_platform_data da850_evm_tl_leds_pdata = {
2 Z% }6 A9 R7 l9 f8 C( u; [4 ~* ~        .leds = da850_evm_tl_leds,
        .num_leds = ARRAY_SIZE(da850_evm_tl_leds),
};
/ ^0 R4 Q+ W& V- m0 G
" J* Z2 B1 b: y5 _+ V  k- ]static void led_dev_release(struct device *dev)
{
};
2 h$ s, x$ z; O# \8 s
static struct platform_device da850_evm_tl_leds_device = {
        .name                = "leds-gpio",
        .id                = 1,
        .dev = {
                .platform_data = &da850_evm_tl_leds_pdata,
                .release = led_dev_release,
        }
};

) r" {: b0 {0 W! b8 q* h. i: r/ ^3 Istatic int __init led_platform_init(void)
6 k7 p  p! {3 W{
        int ret;
#if 0
        ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
        if (ret)
  i' x0 ?6 A; G% c+ c. @- w                pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
. @3 ^  {6 Z" G1 M& ~                                "%d\n", ret);
2 a9 `: h% N# V% Z* ?/ ]' q) V' K#endif
; V( i! W/ ], |$ Z# I* p        ret = platform_device_register(&da850_evm_tl_leds_device);
        if (ret)
                pr_warning("Could not register som GPIO expander LEDS");
        else
                printk(KERN_INFO "LED register sucessful!\n");

2 {, b# G* p/ w, Q6 A        return ret;
}
$ N" Q1 l& |2 a0 W# g
static void __exit led_platform_exit(void)
! Q! e* Z/ t  \; a{
        platform_device_unregister(&da850_evm_tl_leds_device);
" t5 E; p# v" a2 F% W* h6 t
        printk(KERN_INFO "LED unregister!\n");
}

0 \( _0 V" W& g2 K" A+ Nmodule_init(led_platform_init);
module_exit(led_platform_exit);
4 Y& J% x) T8 B& ~' A6 [: a
# O6 p6 E2 T* j, R- Y! s% X* L3 EMODULE_DESCRIPTION("Led platform driver");
2 O. T4 y' k5 D1 mMODULE_AUTHOR("Tronlong");
8 G7 J1 W0 S- B+ g0 I" QMODULE_LICENSE("GPL");
8 ~4 ?# M$ p/ M$ \2 b
6 r3 t" o; T* s. L/ W4 G- P