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求大神给下面的程序做注解,请稍详细些,谢谢。, y. P" A% l4 L7 R
#include <linux/init.h>
' y3 X' y1 w% F7 l" F* V#include <linux/module.h>
8 T$ {* x! j4 C' w( M4 |. `#include <linux/kernel.h>
. z: Y+ @ _+ w3 ?#include <linux/types.h>
8 ?& J& W- x. {3 r7 I#include <linux/gpio.h>
) p i0 G0 p9 s9 K5 E9 j- m#include <linux/leds.h>
% Z0 \. \- n W! m' Z% i$ L; p! i#include <linux/platform_device.h>. `$ N5 [* L( S+ k/ E x7 f
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#include <asm/mach-types.h>. I8 l& p u/ {0 J5 a2 k3 Z% o' }' e
#include <asm/mach/arch.h>
- U9 L: Q7 I: k#include <mach/da8xx.h>4 J! S7 Q) A' v! a# S6 O& A T% ] v! }
#include <mach/mux.h>
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& s2 t0 I4 v+ G$ e( L#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)
# P. L0 u6 m% }5 g2 A( G#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
6 \) t% [6 D) R% j. j; _ [2 {#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)
. m" O5 l+ _8 K3 d#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)! v+ _! o Z0 ?
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/* assign the tl som board LED-GPIOs*/+ u- ~" n l* b% o) f
static const short da850_evm_tl_user_led_pins[] = {1 `6 Z( V# s$ V
/* These pins are definition at <mach/mux.h> file */$ v1 O) o: ^( M: c
DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,
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+ t/ h# R- g. [& Q' _. Ostatic struct gpio_led da850_evm_tl_leds[] = {
1 y ]. a. |, G" H/ H {
6 e. Z4 Y# F% l/ |3 M) z8 O .active_low = 0,8 t4 x2 c l7 f' j' [* ^8 {6 N
.gpio = DA850_USER_LED0,6 Y% b8 U- d5 n4 d
.name = "user_led0",
) a7 @" t% b0 k5 O1 b' l .default_trigger = "default-on",
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.active_low = 0,8 H2 d3 T0 x/ Y: A$ b9 B
.gpio = DA850_USER_LED1,
, v {/ Q) L. c1 o: S .name = "user_led1",
4 J' {% ^3 F$ Z+ _" Y .default_trigger = "default-on",
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.active_low = 0,
6 Q/ i* Z% F, d1 j! f1 [ .gpio = DA850_USER_LED2,* z% p( |$ E# G5 c$ i! b- U
.name = "user_led2",
, b1 c7 ?* k. B& L .default_trigger = "default-on",8 C7 P4 l: c' b" X3 V v
},. ]3 R) n; A: B. N5 S, @
{7 [- G; r: [4 t! i
.active_low = 0,
2 n8 w. |5 h, H& ] .gpio = DA850_USER_LED3,1 s) D2 V1 z! E& o4 X3 t: _( m
.name = "user_led3",1 m" y4 ?0 @! b1 F* h
.default_trigger = "default-on",& {4 k7 x, q6 q7 O
},6 d y) o, {5 z1 I2 F/ j
};
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1 ? q/ j- ?+ X, f( B# i0 N) Astatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {0 Y, c# }* B" S, ~
.leds = da850_evm_tl_leds,! \5 M& U' y. F5 a7 N6 w+ n9 m
.num_leds = ARRAY_SIZE(da850_evm_tl_leds),8 q1 K+ w& [# K* X5 @ I
};8 t$ ~+ A0 ?2 @
7 ^: j% c" D& ?' n* Z+ m4 _* Istatic void led_dev_release(struct device *dev)
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};
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static struct platform_device da850_evm_tl_leds_device = {
6 P4 I/ w6 q/ ?- U# D .name = "leds-gpio",1 ? S9 L; Y7 y/ e% S- I* O& w
.id = 1,! V. \# U* w% m
.dev = {
4 _9 g0 Y; v2 T' q .platform_data = &da850_evm_tl_leds_pdata,
T% J! {# \+ A4 F8 `# i% ]' r .release = led_dev_release,
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};
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static int __init led_platform_init(void)8 z( Z# A7 N* i
{% N% D" D- [6 }' e
int ret;
2 N# O0 A' d& y#if 0# _( {( \$ ] V& N4 H6 P
ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);) X$ Z( d# d+ j7 \+ I, k; x, }
if (ret)
1 Z, W+ Q$ J! ^, R pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
5 @2 C; {( p! i8 ~' r# S W; c "%d\n", ret);
Q$ X2 p, r o2 _# b#endif
3 f; l" `% ?6 K9 Q8 N ret = platform_device_register(&da850_evm_tl_leds_device);0 F, B, y) Y/ F2 B0 b
if (ret)1 O7 F: A. `5 z: Y+ Q
pr_warning("Could not register som GPIO expander LEDS");* V4 f9 B* N5 R
else
$ i8 t; {/ {% x y: Y; n% U1 \ printk(KERN_INFO "LED register sucessful!\n");' R/ E0 Q2 v) }; g: G5 l: A, r
7 h5 `5 ?/ w. ] return ret;' b! f( p' @, G8 j( u
}; z3 u" ~, R# c
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static void __exit led_platform_exit(void). {" c# `0 m% E; i* j" }# O
{
2 `7 z! T f4 y5 J- ?* n# i platform_device_unregister(&da850_evm_tl_leds_device);+ M: G) V% V- D8 w& A E5 W. B$ Z- i
4 O! X5 m `* w# p8 {7 A printk(KERN_INFO "LED unregister!\n");. H, a2 B( }5 K( W% [0 ~
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module_init(led_platform_init);
& @9 ~8 `8 }; D6 Z0 Ymodule_exit(led_platform_exit);
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MODULE_DESCRIPTION("Led platform driver");% }. R2 Q& }0 I1 l) F$ l& Y8 f4 m
MODULE_AUTHOR("Tronlong");
5 v7 r* F3 F# p! {MODULE_LICENSE("GPL");/ \5 ]( ~) {# }" ]
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