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求大神给下面的程序做注解,请稍详细些,谢谢。, F7 }0 \% b$ {! a4 O; n8 ~9 t4 ~
#include <linux/init.h>
. i; U3 Y. O6 H#include <linux/module.h>
: z) y8 H1 T2 ~* S# H2 M: f#include <linux/kernel.h>: u5 _3 X' w! \
#include <linux/types.h># n& i( s1 f' D( Q* e: `4 k h9 U: j! M
#include <linux/gpio.h># e3 N+ W! s9 D# X
#include <linux/leds.h>
% B1 k5 Z) ?3 \- ^9 j/ X) D) S#include <linux/platform_device.h>/ T, B) S* [' b% D0 R2 R: c
8 j5 p _0 [" n#include <asm/mach-types.h>
5 ]' e, h' F6 \5 G$ H4 a#include <asm/mach/arch.h>
' P7 ^ {' g: f+ F0 F( Q#include <mach/da8xx.h>
* l1 P4 V" {7 |. `#include <mach/mux.h>! X3 F1 `- X, a; k
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#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)
5 o+ @4 \9 ^4 y) g. e& \/ s#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
. C) m, F* h6 A4 j8 I' B4 S2 Q#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)
# T7 n3 _3 m7 m8 z1 v, w#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)
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8 O7 c/ u7 e4 I9 {. F8 c2 t, v/* assign the tl som board LED-GPIOs*/
! W$ A6 A) V" G3 Zstatic const short da850_evm_tl_user_led_pins[] = {( J$ m9 X3 P# F. ]* Q
/* These pins are definition at <mach/mux.h> file */5 y) z Q4 p) _- T+ w
DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,) m4 ?/ h" F3 R$ _6 Q1 X* @
-1
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static struct gpio_led da850_evm_tl_leds[] = {, l% i+ Y( W( W) h! V0 e5 [
{8 E7 b. @ M+ k$ S7 ~
.active_low = 0,
l, {3 C; N) w- b .gpio = DA850_USER_LED0,' d" }$ {3 c2 |) E% B4 E; C: d2 F, ]3 X
.name = "user_led0",& Y) R! {/ U$ R# P3 @- U( S
.default_trigger = "default-on",9 ^. d7 E$ Y- D' L$ s: X
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.active_low = 0,2 \1 w( q* v) ?( {2 L: w
.gpio = DA850_USER_LED1,
5 Y1 q: ^, I* H8 l2 O .name = "user_led1",8 T6 k6 B) v7 V) n3 }0 |
.default_trigger = "default-on",) z. d& J5 e, L! `
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.active_low = 0,
; B z6 e' r2 f .gpio = DA850_USER_LED2,
+ F" b8 b2 h+ T" i2 v$ m0 s .name = "user_led2",! @9 l. @# F% D* Z' H6 {- T
.default_trigger = "default-on",
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.active_low = 0,
6 B9 t# f* | L .gpio = DA850_USER_LED3,
% k6 f: S4 i" [. ?+ h g .name = "user_led3",
5 d4 m* y3 L3 @3 ?. x .default_trigger = "default-on",
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};
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- C6 W$ b/ |, \ Q$ i( s- fstatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {0 f. Y1 `: S3 x/ g `" v0 t
.leds = da850_evm_tl_leds,
. S5 y( m& L2 T. H# j: T4 F .num_leds = ARRAY_SIZE(da850_evm_tl_leds),
3 f( r/ A, [9 `- e: ?};
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static void led_dev_release(struct device *dev)
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};
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static struct platform_device da850_evm_tl_leds_device = {
+ f( l* j' [# ^6 x .name = "leds-gpio",% x( a5 [' J, c" E2 a. Y T
.id = 1,
/ M" ^$ a* H, d- Q# s1 y! R .dev = {( O& N. D8 E0 ]3 P
.platform_data = &da850_evm_tl_leds_pdata,6 D9 f3 E5 X! O r& ^. q7 Z
.release = led_dev_release, V9 w! P5 ~5 g. ^8 @1 k
} [( p9 W" d2 A8 Z* z
};5 X3 S( V2 Z) O
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static int __init led_platform_init(void)" ?) }& a. ^9 n+ k9 r- L1 o
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int ret;
0 _5 i+ z5 _* {- ^) ]3 P/ ]#if 0( z( t% X* Z5 k! l, B
ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
3 z9 I0 w" W9 W) N if (ret)
3 I5 z9 Q# r7 ^$ ? pr_warning("da850_evm_tl_leds_init : User LED mux failed :"9 K0 b: ]0 h& J$ \
"%d\n", ret);6 j% C: B" ~: H3 g2 r
#endif
7 y& x! L4 b, w+ C ret = platform_device_register(&da850_evm_tl_leds_device);/ x0 O6 Q# h* X W4 Z0 Z3 G
if (ret)" K. N0 z/ f/ r! S$ W
pr_warning("Could not register som GPIO expander LEDS");& U1 p, v4 L& I
else7 b# e* z! y- [" d: f+ O" G. A% E
printk(KERN_INFO "LED register sucessful!\n");& L* ~0 [+ Q2 T
% m1 g, N! [2 w6 D: O return ret;
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static void __exit led_platform_exit(void)9 b" ~1 k+ {0 F5 |2 w
{
; g) }7 e2 F" \, a! w; n) I platform_device_unregister(&da850_evm_tl_leds_device);
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) U2 ~' B: }5 I* P printk(KERN_INFO "LED unregister!\n");
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module_init(led_platform_init);; q0 r. b8 N: Y
module_exit(led_platform_exit);
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MODULE_DESCRIPTION("Led platform driver");6 H# v8 H+ m' f* {9 a. n
MODULE_AUTHOR("Tronlong");0 G( Q* ^" j" L+ F
MODULE_LICENSE("GPL"); a, S" ^. V* m7 t/ h
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