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求大神给下面的程序做注解,请稍详细些,谢谢。6 F/ n) g/ H& ~6 q- j/ o5 O3 k0 v* c
#include <linux/init.h>
! Q# h$ d( }( d#include <linux/module.h>
" g6 j" n1 y" N#include <linux/kernel.h>. P1 G( @8 o- g8 S
#include <linux/types.h>0 W0 p& J2 x. P$ U1 V
#include <linux/gpio.h>: D; Y# e+ z, T- t8 y
#include <linux/leds.h>
, n) |- N0 |9 S3 J' ^#include <linux/platform_device.h>
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#include <asm/mach-types.h>
7 _3 P* M, L# q" B) \#include <asm/mach/arch.h>6 b- x' r: ~& \0 k; z2 d7 K# ?
#include <mach/da8xx.h>! ]8 E( k: F9 P1 R$ i0 j3 o8 h9 D
#include <mach/mux.h>9 O; A5 X4 `& C# H4 E
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#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)# O+ |5 q; W3 e
#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
) i& a+ v1 Y2 S. f7 x: Q0 m. X1 c#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)
9 X) Q( X8 [7 w, `: s#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)
- R2 w6 o( Q, \5 y
% [5 t' G! b4 I- K! S/* assign the tl som board LED-GPIOs*/! u% A5 @8 N) s* S* P8 y' f
static const short da850_evm_tl_user_led_pins[] = {: m, z7 s! v: P* K: }
/* These pins are definition at <mach/mux.h> file */
1 q0 |, K% i# B DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,
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};: V! \9 E2 [ B$ t
- V9 X' y+ I1 r P& pstatic struct gpio_led da850_evm_tl_leds[] = {3 T" n0 K: X0 h+ |
{( X' I4 ~2 m+ E
.active_low = 0,/ S2 j( y) g' t2 H5 v$ b4 l
.gpio = DA850_USER_LED0,
9 P5 w- w* u* P* Y* t! s$ R( S .name = "user_led0",; y3 ^- o- \, w2 R/ K/ L- N
.default_trigger = "default-on",. @5 T+ W/ ~' h# C1 _
},
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.active_low = 0,
/ E* T% X; l" { W. }, a2 B .gpio = DA850_USER_LED1,
" ^ x, ]9 E9 {, p- V .name = "user_led1",
9 h) `/ n# I8 A9 Q; g .default_trigger = "default-on",
: T9 w% m6 N7 [% @ },- T% L- ?) X: c/ F
{( \6 C' f; I4 f0 s, R& k' Q/ B0 D! O5 H
.active_low = 0,5 m# o( z7 f; s- U/ s- \6 o+ J: \
.gpio = DA850_USER_LED2,/ |5 v( C+ u$ s$ Q# [. A
.name = "user_led2",
4 ^4 ]; C4 A- T. d$ j# D .default_trigger = "default-on",
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{+ I" C* J( g7 a6 W9 {
.active_low = 0,
7 R6 v3 Q* B( J .gpio = DA850_USER_LED3,/ }5 e3 m5 P* d( ]7 ^
.name = "user_led3",0 ]# D! g# F9 w# Q
.default_trigger = "default-on",
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};
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static struct gpio_led_platform_data da850_evm_tl_leds_pdata = {
7 P2 @7 ~4 O; \4 u .leds = da850_evm_tl_leds,( A. q- {. H) Z1 T
.num_leds = ARRAY_SIZE(da850_evm_tl_leds),8 f. V+ A5 L: A% @
};
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static void led_dev_release(struct device *dev)
5 V% _1 |; J& [) m. E3 d{
2 D b! R3 A4 j9 q u9 f$ H};
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. Y& g- D3 ^" M7 y( ]0 i" x3 Fstatic struct platform_device da850_evm_tl_leds_device = {
! N7 K7 O% o* d; ^+ \; C" Y: b .name = "leds-gpio",
3 n" k( g4 i; l; b+ y( s/ I, a .id = 1,
* A- g( x1 f8 k+ R1 f( O5 q .dev = {/ d! ^/ Q0 D0 P- ^
.platform_data = &da850_evm_tl_leds_pdata,3 p0 [- y# k ^9 ]( ?7 h# e+ C6 [3 Q1 h
.release = led_dev_release,
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};+ O$ u0 h- ^ V9 w: A
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static int __init led_platform_init(void)/ A1 C) e- Q6 N
{# p5 B% i5 F2 `) _+ ^
int ret;
" w* L3 h' p+ X1 @# g#if 0
: e7 }/ V' k1 |: k5 w ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
* K4 o4 g4 q1 L0 g if (ret)7 W# n: f6 n/ |8 P7 h* c
pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
- C1 Z5 S: x! h: C5 P) V- ^% _ "%d\n", ret);
3 Q8 A; W5 z9 p9 N$ Q#endif
4 k$ t; Q" d1 R4 x- O* Q/ L& Y ret = platform_device_register(&da850_evm_tl_leds_device);
8 K! u: v' b% ]9 I0 X if (ret)
" Y9 O) K+ Y+ x% A( b1 K% C pr_warning("Could not register som GPIO expander LEDS");
4 d: B2 m7 g( u1 c7 v7 A. Z7 p# J else
) `- h+ C% r$ Z4 A2 Q printk(KERN_INFO "LED register sucessful!\n");
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return ret;- Q2 l5 p, s) O3 l7 k4 c
}
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static void __exit led_platform_exit(void)- G8 W# A6 O+ N e
{9 U T* t6 g( \6 R% t' [
platform_device_unregister(&da850_evm_tl_leds_device);
) D6 ^' z* x8 g- J2 S& [7 P* K9 G# j( N& m
printk(KERN_INFO "LED unregister!\n");- S" L& U! J2 _ G2 j( i- r; D
}
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( d" x4 a) p8 X3 J) t4 H) m2 nmodule_init(led_platform_init);
' f" ` J& R6 t# n) Fmodule_exit(led_platform_exit);: ^* B: U5 p! |6 @- n; U7 l; M
/ [" ]* l" @9 Y. P; g. r" ]MODULE_DESCRIPTION("Led platform driver");/ t5 S1 U9 E- M7 ^$ I- o- b' s, g
MODULE_AUTHOR("Tronlong");
, S% g; Y8 ?: |1 ]* |) E6 XMODULE_LICENSE("GPL");
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