程序注解

rgf

求大神给下面的程序做注解，请稍详细些，谢谢。
#include <linux/init.h>
#include <linux/module.h>
" n0 b3 o  H4 N#include <linux/kernel.h>
#include <linux/types.h>
8 a- w) ]3 Q4 Z' V0 b" p#include <linux/gpio.h>
#include <linux/leds.h>
" p& [( c" b: C6 I, E& g% }#include <linux/platform_device.h>

#include <asm/mach-types.h>
3 C: t0 j) o! R) |, q* H#include <asm/mach/arch.h>
#include <mach/da8xx.h>
# o/ x3 F, }4 D; X2 ?4 ~#include <mach/mux.h>

#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)
  i' E2 e; B0 D$ U: q; N
+ w& S* M9 H4 v2 z+ T1 C: H/* assign the tl som board LED-GPIOs*/
, o. Y  [) {+ ostatic const short da850_evm_tl_user_led_pins[] = {
+ n# U$ I$ C" l0 |. }( @0 w        /* These pins are definition at <mach/mux.h> file */
        DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,
        -1
};

static struct gpio_led da850_evm_tl_leds[] = {
0 P8 y% e" I& J8 o        {
                .active_low = 0,
                .gpio = DA850_USER_LED0,
                .name = "user_led0",
                .default_trigger = "default-on",
5 t5 S5 V7 z0 }0 r        },
        {
                .active_low = 0,
                .gpio = DA850_USER_LED1,
  B5 v/ k& f; L0 r8 y5 k8 f                .name = "user_led1",
5 d, `7 P9 @% k$ v: m. F                .default_trigger = "default-on",
        },
        {
/ b& V1 ?! l* `/ X4 }1 Y* c$ d; M                .active_low = 0,
' D* f" V( F$ |                .gpio = DA850_USER_LED2,
7 |- b# E7 @5 H; @                .name = "user_led2",
7 X2 i! G& y: y& |6 z3 V+ V) c& y                .default_trigger = "default-on",
        },
        {
                .active_low = 0,
' I/ a# c7 W" Z8 ^2 u9 f3 `                .gpio = DA850_USER_LED3,
                .name = "user_led3",
                .default_trigger = "default-on",
        },
% ]" N% a7 d) p. j};

static struct gpio_led_platform_data da850_evm_tl_leds_pdata = {
        .leds = da850_evm_tl_leds,
! m# }' r* K' g! g        .num_leds = ARRAY_SIZE(da850_evm_tl_leds),
$ |( u/ v6 T: r};
( v: j0 V/ p  N* Y# T
/ s' K, i, d" @" G1 p! A) Hstatic void led_dev_release(struct device *dev)
{
};
( h6 n: Q* O! |  v. z
/ C3 i1 x4 {! V; B  V' v& @static struct platform_device da850_evm_tl_leds_device = {
        .name                = "leds-gpio",
        .id                = 1,
# u& a; |) a+ x- n' R        .dev = {
                .platform_data = &da850_evm_tl_leds_pdata,
                .release = led_dev_release,
        }
};
5 T4 p5 d, b# M) O
8 ?( S0 F6 q# C. ystatic int __init led_platform_init(void)
1 O6 W) p8 h0 K7 Y' h$ s{
        int ret;
2 y/ l" p0 w0 K#if 0
        ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
        if (ret)
) w9 G' _" d/ A7 h# J                pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
" L8 m) |+ u0 ]3 I                                "%d\n", ret);
#endif
* O2 [4 i1 h1 y' T  L0 x        ret = platform_device_register(&da850_evm_tl_leds_device);
0 j  ~: o: L8 h% P        if (ret)
                pr_warning("Could not register som GPIO expander LEDS");
% N3 @) `, o# z; f  t        else
                printk(KERN_INFO "LED register sucessful!\n");
" T6 ^+ `0 |0 c6 @
        return ret;
}

) W! h8 ]. ?6 a6 p4 A% Wstatic void __exit led_platform_exit(void)
  `3 X8 J8 @" A$ e* \3 N1 n{
        platform_device_unregister(&da850_evm_tl_leds_device);

        printk(KERN_INFO "LED unregister!\n");
}

module_init(led_platform_init);
module_exit(led_platform_exit);

MODULE_DESCRIPTION("Led platform driver");
& D; @8 Y$ M( m5 q3 q3 S- rMODULE_AUTHOR("Tronlong");
MODULE_LICENSE("GPL");

4 x9 {! V6 g- x' _+ T1 R7 R