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求大神给下面的程序做注解,请稍详细些,谢谢。! i: }2 v( O2 O/ b
#include <linux/init.h> K3 m- U. i- n8 H
#include <linux/module.h>% b5 ~) [- D7 _" ^- j# j
#include <linux/kernel.h>
- f) l- j; c. x, `6 k#include <linux/types.h>' R4 C* v' B9 N5 t4 i# s: j
#include <linux/gpio.h>9 H) N- U9 N7 K2 ^
#include <linux/leds.h>( Y4 z0 `' }5 }
#include <linux/platform_device.h>
; m- g& A- W3 t- [! x
" B9 ~* q. \& [- M#include <asm/mach-types.h>
% M2 z; ]& B7 M l% l' ]#include <asm/mach/arch.h>
' F" w; q( j6 e i4 D1 @3 W#include <mach/da8xx.h>$ X0 U9 U4 v' ~' l
#include <mach/mux.h>
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5 w0 \) h# c! A, C#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)8 i" [+ r0 Q2 r' Z9 Y8 K* P
#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
3 }0 f2 }5 s$ e% }#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)
I8 l% w6 p+ k4 @; w- t#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)
5 |6 q, A; |7 y) ~4 w0 i+ U3 r% X5 A. g9 G! `
/* assign the tl som board LED-GPIOs*/
. c( o# I, l* o6 S: Hstatic const short da850_evm_tl_user_led_pins[] = {
$ s7 f( F' F* c/ K# ?8 i /* These pins are definition at <mach/mux.h> file */3 m4 P4 k* ]; \# Q
DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,, l& v- W$ L% Y3 m2 x d1 G
-1
; L! i, J, w; ]7 D};/ c3 m( X( v$ }: C+ t# v. H% R
" e5 D$ t% T \( Estatic struct gpio_led da850_evm_tl_leds[] = {
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.active_low = 0,) X0 r. x4 p9 L" B9 k K, L1 M
.gpio = DA850_USER_LED0,6 P3 K4 g5 t% }
.name = "user_led0",
4 `9 ]' R, {, r7 ` .default_trigger = "default-on",
& v |$ {2 q# I5 a, e7 g1 x5 o },
- s% G- o- q! E$ F+ J {
- L( O0 I. {$ n f) r9 b; p- O. m7 N/ h .active_low = 0,
$ |- j9 m* D( t& p8 H .gpio = DA850_USER_LED1,! p3 ~% m/ g" `( o7 |! v
.name = "user_led1",
- k* x- m- D0 k* M' z) [ .default_trigger = "default-on",
3 n. \9 P, S- `& |' F2 g' Z7 X+ S9 f }," ^& Q& J' H+ Z7 b1 D' f
{
' Y! [# m5 L3 m .active_low = 0,
3 [( ?0 [$ [% K: d7 e .gpio = DA850_USER_LED2,4 [" b. c5 e, o& m
.name = "user_led2",' Y' ?7 n Q5 ~& G
.default_trigger = "default-on"," r& R* y) N8 a
},. n. @3 Q/ p. P$ F) f2 |
{7 V0 ~+ y t- b& W
.active_low = 0,# r: _# J- r* O% F+ ?
.gpio = DA850_USER_LED3,1 d4 l- Y. X8 ~, L+ t
.name = "user_led3",8 m" n& t7 H$ B7 K
.default_trigger = "default-on",
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};8 J% V/ w4 K' T9 h
* p( p5 _$ ~8 t) D& I- cstatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {( P! i- W; g: o$ B" Q$ K
.leds = da850_evm_tl_leds,8 J7 r, O/ N, |' A2 v0 m
.num_leds = ARRAY_SIZE(da850_evm_tl_leds),6 z1 V; o0 S# x3 u9 Q A0 G
};1 J; f' T z0 P; P5 e9 ?
3 @1 g- x7 b* b) P$ {static void led_dev_release(struct device *dev). w; K* {, }* ?0 p0 M! O+ ]6 G
{' S! P- L5 u/ l; w' _
};
+ R. v+ o5 p5 Q, w3 q: A1 l
3 m/ G; A5 @/ zstatic struct platform_device da850_evm_tl_leds_device = {2 y s+ j1 T$ ~: f8 q, V
.name = "leds-gpio",2 _: r& a& U9 s8 d' |" T' D) F. z
.id = 1,' a6 r6 {5 P P( v: g0 m0 z
.dev = {& e) n+ `' ]7 J) Z2 D- a2 a4 d
.platform_data = &da850_evm_tl_leds_pdata,
2 P& z3 \$ W `& M' u .release = led_dev_release,
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};# A/ z2 R+ @9 {* r0 Y
( V9 f" |, [- R# o8 ?! x# Ystatic int __init led_platform_init(void)& @' E6 u2 B1 C8 V
{
0 p$ `: o9 a$ ~0 D( U* ^ int ret;
4 W1 @8 }; g( P. L: V" M3 B#if 0
$ o2 h& @) T3 M. w5 D( Y; a ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
/ Q0 Z: X. a4 [8 x if (ret)
* H$ L! {3 Q7 `3 x5 \/ |+ } pr_warning("da850_evm_tl_leds_init : User LED mux failed :"4 v) J5 x3 t5 O5 D, p S) w
"%d\n", ret);# ~! Z# z" P) Z# }7 |0 Z2 E
#endif& _% |2 r Y, b! H& u# k1 h
ret = platform_device_register(&da850_evm_tl_leds_device);
1 V- x( E# R V if (ret)
|$ Q7 O7 o0 P, T0 H1 D pr_warning("Could not register som GPIO expander LEDS");
" L' T5 [# }5 _; u2 Q else" e5 W* c9 L& |6 |3 Z; D; M
printk(KERN_INFO "LED register sucessful!\n");9 y" |' u3 p7 H% l
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return ret;% e1 V6 U9 `3 v
}9 g% L$ r0 Q) [2 z
8 M' o6 F) Y# z9 Y& W* a2 ?static void __exit led_platform_exit(void)9 l8 m) {! s' ], o9 |' z* @
{
" @1 F! A% k T" f$ D' Y platform_device_unregister(&da850_evm_tl_leds_device);
% k! Y. w$ d+ B2 V1 _( w* t. @" C& i1 @. Z
printk(KERN_INFO "LED unregister!\n");5 H+ X' J2 {$ l! s: P1 V
}
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module_init(led_platform_init);6 X4 I+ _* Y% F* ~9 \% x& k6 G' d
module_exit(led_platform_exit);
9 q. Y6 \! M2 z% q$ e
5 U0 y' |% M& Q' h ? zMODULE_DESCRIPTION("Led platform driver");+ E% Z# }( ^- N3 V/ G' C3 Q
MODULE_AUTHOR("Tronlong");) T; q% `* O. ]8 R
MODULE_LICENSE("GPL");8 Q7 D$ x( h; y
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