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求大神给下面的程序做注解,请稍详细些,谢谢。
# t# h* z5 c6 u- \4 D! Q; h3 H#include <linux/init.h>
3 d* t7 Q+ |( k8 ~$ D j) Z#include <linux/module.h>7 T: M/ v) q( j! Y4 R2 Y' J
#include <linux/kernel.h>& u9 I0 P/ f* v& ]/ f: E
#include <linux/types.h>
! s8 V0 F6 ?* ^) W) s#include <linux/gpio.h>: c, ~6 F+ X; J$ A# C7 @. [: R/ @
#include <linux/leds.h>+ ~" [* `3 t' @1 r; q! B ^* g
#include <linux/platform_device.h>; T$ E$ I' v" o+ ]$ `5 U6 {
( w, H0 \$ `: S5 C- [
#include <asm/mach-types.h>0 }; N% F+ `3 q3 _7 t
#include <asm/mach/arch.h>
9 _3 G) h6 X @( `4 Q/ ~#include <mach/da8xx.h>
g0 t0 Z$ m, f2 p! o! J5 U#include <mach/mux.h>, K$ ?) r3 f: W3 u% Q
# }+ [' V' p+ o4 M* t1 t, X8 v
#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)0 C! t( H" t# ^6 c, u
#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
& u0 V0 c, }- V6 c1 _ v3 ^#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)
4 _& N4 Y: p. w: X" g1 \. R#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)3 j3 l7 L. R+ x! A' d
0 T8 z4 j8 d$ Z. X/* assign the tl som board LED-GPIOs*/
. Y( Z3 i# S+ b& kstatic const short da850_evm_tl_user_led_pins[] = {
& H5 e$ Y9 |" u( `' C /* These pins are definition at <mach/mux.h> file */! v+ f- k* c; u! h2 z
DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,3 U% C1 C" x6 ?7 j, G" q2 r
-1
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# s- ?2 b! K- s( _8 Bstatic struct gpio_led da850_evm_tl_leds[] = {
7 Y* c6 [) Y2 C/ n4 U5 u+ u; q- p {
. ]: D! T( d4 f; l .active_low = 0,1 d. E6 r j$ P" l7 U9 J6 E
.gpio = DA850_USER_LED0,
& [6 \. D. H& h& \: C .name = "user_led0",0 Z# D* }( O- _4 N! _7 t
.default_trigger = "default-on",* b2 q- l5 R% o: L3 c& [8 G- x b
},
& j3 Y2 _) ]2 F0 L( c8 O {. \( s) x! f- m* e/ J3 w$ Y4 _
.active_low = 0,9 \. X# z. v9 h4 M
.gpio = DA850_USER_LED1,& u( a, w$ V) A0 z
.name = "user_led1",- G$ k/ e1 ^& n1 U5 d
.default_trigger = "default-on",
! z. E6 I6 d3 q) c; B },
0 ?: N9 [0 U' o" h/ @$ ^3 V0 M6 B {
/ o' |7 r3 B d' `5 z! g8 x2 v .active_low = 0,
/ s! J; O1 ~+ E9 l! z* b .gpio = DA850_USER_LED2,
7 B" u: P1 p( T0 L8 x5 v .name = "user_led2",. V2 X7 ]7 K# Y3 X
.default_trigger = "default-on",
" R$ h/ Z6 P+ z7 C+ C6 ^! s2 \) p4 P },
+ F" N* e3 e/ ~" J {
3 \" z& c/ e% _8 O .active_low = 0,
" d E4 U! @ l8 q ~ .gpio = DA850_USER_LED3,
& M3 B. f5 ~( a* z# b( | .name = "user_led3",
* t3 n5 \# w0 D# i9 `& `" g# e* a .default_trigger = "default-on",0 j& a! `( q* w% r4 m
},( p/ q2 r: F j. o
};
% \% f/ C h3 N( D n
" Z4 T; j* n$ ^* O' M( [* Fstatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {2 M7 m$ j/ T7 G% D& H' |& w- u
.leds = da850_evm_tl_leds,
' P7 Y9 `# ~. M: d' p0 K .num_leds = ARRAY_SIZE(da850_evm_tl_leds),
* |2 v5 |" ?1 X9 j; {4 f2 J};& V9 [4 h' L" u9 p
2 Y& L4 M6 a2 Z; r; ?8 h u
static void led_dev_release(struct device *dev)
5 K( K9 Q) ^8 ?; H{ N6 f! G$ _( h5 U/ i+ ~6 _
};
: X+ W3 N$ P: U1 O( U
; k( P7 l/ L9 X; e; bstatic struct platform_device da850_evm_tl_leds_device = {
- V+ C/ `8 z% @8 Y) W! y4 U# O .name = "leds-gpio",
1 h- |: @5 o" X7 S .id = 1,, H4 k2 b1 N5 s# U
.dev = {; t3 h$ G1 M o$ s6 {5 m" y9 n
.platform_data = &da850_evm_tl_leds_pdata,
L# X9 [& Z' Y- f! w .release = led_dev_release,( s, W% }. x& A$ U% r, v }' F9 e% E5 @
}
! U: T5 v ` E* X};" Q: |0 N% U8 l# L. C
/ u$ {6 I" ]8 n% Wstatic int __init led_platform_init(void)$ V6 Z" s. V5 ~8 T1 y( z. D
{
- ]& Z, m# ?4 E int ret;, j2 I& v: H1 Z' V; Z. b, |* h
#if 0
0 a; `6 p+ u! t2 N ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
' J4 o) z% t% l) O7 {1 l; H if (ret)
" C# V% R1 V: x, s$ H6 i3 y, P; o pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
" V1 A# [8 K# b- e. m3 _ "%d\n", ret);5 J8 a2 U8 N8 G( K+ x
#endif
. D4 U; V: T$ j/ l ret = platform_device_register(&da850_evm_tl_leds_device);
- A4 p( o4 c, Z( ~( h9 @4 x8 X if (ret)/ K' [( O- Q- j/ u: C) M
pr_warning("Could not register som GPIO expander LEDS");
$ y* f. _- u- ^ else; }( n1 H% X3 }3 H+ q. U! N% z3 S- A
printk(KERN_INFO "LED register sucessful!\n");* {; B5 F+ u' q# `3 a' ^) t
5 o' {- k0 O7 v5 l# H% q
return ret;7 q( F) ~+ r8 @9 h* @+ E( l( A& m
}+ O8 n$ T0 I% e: v( u# Q, k
9 z& A& J: w% |% n$ [static void __exit led_platform_exit(void)* r4 `) a" K m" ?
{
, z* I: p P3 ~& {6 l U platform_device_unregister(&da850_evm_tl_leds_device);" l' q( S! R4 C; c
( L' C! z1 {3 q7 O) P printk(KERN_INFO "LED unregister!\n");
1 O3 \2 J+ T" W) d3 s- ^7 `/ c}% r' p. X$ [7 z, V; G
h0 r( r& f' o* \& Y( Ymodule_init(led_platform_init);
1 O, G3 t/ f+ _3 g. _$ }% bmodule_exit(led_platform_exit);
. i2 l2 N) B) f' ^. l1 S3 j8 o+ }
* ?( d3 |! V4 c8 f0 ~6 {MODULE_DESCRIPTION("Led platform driver");
& T. W! V& W ]0 W3 o9 d7 b! vMODULE_AUTHOR("Tronlong");
9 N1 M% V- V0 P' f" qMODULE_LICENSE("GPL");4 E# k7 ^1 x5 P6 I9 y! D
1 N6 I% L5 ^7 Y4 S
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