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求大神给下面的程序做注解,请稍详细些,谢谢。; j) S; t% S3 V6 u8 u7 ^
#include <linux/init.h>
+ \% R8 Y/ m7 P: J#include <linux/module.h>
# ^! Q+ y' s( b& L+ `3 w0 o#include <linux/kernel.h>
$ P7 W, M( b. ~2 M' @; O/ D) m' n% w' I#include <linux/types.h>
# {2 j, n( Q/ F! z* V3 r#include <linux/gpio.h>, @+ T8 ]/ j! [9 x: E
#include <linux/leds.h>& L+ m( [ y( y9 O3 r" G
#include <linux/platform_device.h>9 P$ [% `- F: v2 T
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#include <asm/mach-types.h>
, C1 v4 o* F+ @5 s; V#include <asm/mach/arch.h>- [/ `" V" C2 X( E1 R9 d5 n2 q' r
#include <mach/da8xx.h>* K/ |& C& d, ?$ Z8 c- z t
#include <mach/mux.h>
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% v2 J& X- p4 B& f; ], b#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)3 ^4 B$ b# y. o" m
#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
( E8 B4 r3 h! Z8 ?) T( R; {1 m#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)- x( @3 ]9 |- I- |' S! |$ _
#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)! b5 ] V5 J" f- _) N
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/* assign the tl som board LED-GPIOs*/
' d& t# }$ ]* E0 d5 H; ]9 X# d0 _3 `static const short da850_evm_tl_user_led_pins[] = {) P) I$ [7 b. }& b9 {
/* These pins are definition at <mach/mux.h> file */7 H: S8 M' D$ v( N+ g( S0 g
DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,
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8 z- W3 y( i4 R, p+ F" e};
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static struct gpio_led da850_evm_tl_leds[] = {
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.active_low = 0,4 v% J d( X2 j, I4 T: d* j
.gpio = DA850_USER_LED0,
+ |3 M( |2 M: b. Z. u5 U2 { ] .name = "user_led0",
) V( R9 W, R8 U. b/ } .default_trigger = "default-on",5 A) z5 G/ \. ^
},
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.active_low = 0,7 d0 X* _' b! y3 d7 N
.gpio = DA850_USER_LED1,( [6 Y7 D3 f* [. n
.name = "user_led1",
' C1 {8 l, x2 z5 O .default_trigger = "default-on",/ L+ V3 V6 k/ M& b5 t/ S& a( y' ~
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.active_low = 0,
* j% h3 Q6 ^+ l5 O( S/ x( s .gpio = DA850_USER_LED2,9 z. Q) Q2 m E9 @( W4 A
.name = "user_led2",/ X2 W- z$ |2 B. g: e" u% M1 i
.default_trigger = "default-on",
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{
' ?+ `2 F. l3 O- k. ]& k0 b. V .active_low = 0,
3 Q' u }# J4 g4 _8 S- U .gpio = DA850_USER_LED3,
. M6 b) ^: C4 A; m5 Q! w5 j .name = "user_led3",
$ K3 i* T, [ E# M$ i' g; y. Z9 g .default_trigger = "default-on",
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};
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5 t0 o7 l" H$ A6 n, F. fstatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {3 {! V) Z9 ]) {0 N A/ v. Y5 W+ \5 D( N
.leds = da850_evm_tl_leds,
# o- l0 W7 O; I) w# b: [ .num_leds = ARRAY_SIZE(da850_evm_tl_leds),
$ r: x3 U0 V) Q# L3 c$ y% j: R) `};
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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 = {7 f- u" o6 l$ K' `* h. n
.name = "leds-gpio",- Z( P; m1 C( }+ g0 Y1 |
.id = 1,
0 g1 H0 n: Z1 b. F .dev = {3 t% e8 p, L: C) W6 [ h( h5 J
.platform_data = &da850_evm_tl_leds_pdata,
`9 W D# z2 ^! H' y8 |# p .release = led_dev_release,5 p. |4 ?; ] \' R6 w
}
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static int __init led_platform_init(void)
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int ret;
# W4 f3 N, k& C; a#if 0
3 P1 T: g# X O6 y \! Q3 z ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
$ d: f8 o' A3 q# h7 P/ ] if (ret). @* b7 D* f, i' ]7 t" T& n
pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
+ N$ K0 M+ E; Q; r! b7 { "%d\n", ret);
7 E4 }1 }2 N2 K. E5 ^/ w8 [( I. R#endif( D7 `) W5 O4 y7 ~
ret = platform_device_register(&da850_evm_tl_leds_device);
' ]- y0 I" X9 r/ _- j! ~- \ if (ret)
8 L* ?1 h0 g8 @2 o# d3 K pr_warning("Could not register som GPIO expander LEDS");
2 u. L0 o4 G& x$ a else( F: L1 f7 `2 \, {8 F7 T6 s" ~
printk(KERN_INFO "LED register sucessful!\n");
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return ret;, g: E5 d$ W; c; S1 W
}
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6 s5 C: y; g8 {$ A- s. O, X) sstatic void __exit led_platform_exit(void)
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platform_device_unregister(&da850_evm_tl_leds_device);4 r1 q! |; z" v
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printk(KERN_INFO "LED unregister!\n");
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) ]/ F) L& t1 N0 X6 w wmodule_init(led_platform_init);
: n( O9 b& Z! h; E* p- Z# B: [module_exit(led_platform_exit);
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; d* M' o; F. n. _% ^9 xMODULE_DESCRIPTION("Led platform driver");
- X6 |$ ~& j$ ~9 c7 L, C: aMODULE_AUTHOR("Tronlong");5 m- D+ u# r9 P* m& A9 g
MODULE_LICENSE("GPL");
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