|
|
求大神给下面的程序做注解,请稍详细些,谢谢。
! f3 |! S. E3 ]/ M: U3 t8 L5 u#include <linux/init.h>
5 ~4 m4 ?$ l* r' Z0 V8 @9 s#include <linux/module.h>
4 k+ }6 ?# Z2 ]) d; k! Y9 U$ p d' D#include <linux/kernel.h>8 W- x* A" L% Z$ g2 P" h; [. ` J
#include <linux/types.h>- v6 ` M) i7 ?. ] o: T: r' ~
#include <linux/gpio.h>
@: z8 j6 P0 }: q4 i& Q0 o#include <linux/leds.h># e7 m) c' l- V6 N" Y4 R' V
#include <linux/platform_device.h>( g1 ^& \- u* H+ L
m& L4 V6 |+ d N
#include <asm/mach-types.h>
3 e0 R) V/ S9 o* g, F8 \#include <asm/mach/arch.h>
. ~2 O: c; H/ B9 `2 E' z+ _& z1 s- j#include <mach/da8xx.h>/ ^8 X9 g& u# }1 q. ?% o W9 E
#include <mach/mux.h>& U# M4 V1 _2 Q1 `& X ?) f
; }7 B# \8 R4 Z! r#define DA850_USER_LED0 GPIO_TO_PIN(0, 0); U: A- r" Y6 |; K6 r
#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)8 S- S' R5 d* u8 C- F9 I
#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)
O2 |8 r6 }4 t: v#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)6 U) f9 D' C$ G! L0 a$ t' l6 V
6 j& b; x4 U4 f+ p: {/* assign the tl som board LED-GPIOs*/+ {" ~" e U; C8 @) C- {
static const short da850_evm_tl_user_led_pins[] = {' }$ W+ O4 U8 _& x
/* These pins are definition at <mach/mux.h> file */; r {0 H: I9 L C7 \. P
DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,1 w" r6 l$ [. L6 G, A
-1# n" p+ c( f4 I7 z& b
};
( I/ p, K- P1 ?5 A, [; C, b! g* B% i% q
static struct gpio_led da850_evm_tl_leds[] = {
& S. N( _6 r/ g {9 W1 l9 M6 C3 n
.active_low = 0,) w s; B# w; ^ Y$ L+ @' j
.gpio = DA850_USER_LED0,& s Y7 p! y+ h
.name = "user_led0",. _6 e$ y' y. M. j# x: Y# |, K
.default_trigger = "default-on",4 s1 c$ t/ `- _& S' v; r
},
) z/ P& s4 H$ G6 F) U2 {, L1 w {
) v% O, `6 G M4 W .active_low = 0,
* z. ^+ {% [6 P0 N. ` n .gpio = DA850_USER_LED1,
~" q& ^, i2 J .name = "user_led1",( l# I1 [: a- a1 l! f
.default_trigger = "default-on",2 _$ l& V f5 }) P) q4 I
},6 w% T* t5 \. N2 P- w7 k; B& `& |
{
0 w) m6 l5 U/ ^( P4 d$ P .active_low = 0,5 Q% V! y b. a. [
.gpio = DA850_USER_LED2,
* r8 |# R0 M v7 V5 M .name = "user_led2",5 b; a9 a0 s' s5 g' P
.default_trigger = "default-on",
0 |4 ?3 ]' E7 i# F1 k7 T9 g* C },3 J; {& K) z+ q' T. R
{% U$ E" E( B: U7 ]: y
.active_low = 0,, O1 V* u' ^ c1 f( n! a6 B# t
.gpio = DA850_USER_LED3,$ F1 P8 o7 t5 h/ D: J/ O$ y" z
.name = "user_led3",
3 g- `- @) X' ]- L# a) b .default_trigger = "default-on",( l5 H, x8 J) V+ I J N
},+ B8 O- Y) R R/ g$ V
};
# M0 m7 F) w% R- c* ]2 T" j5 r# R5 t. i, r# }
static struct gpio_led_platform_data da850_evm_tl_leds_pdata = {1 r0 D P; R( t7 K
.leds = da850_evm_tl_leds,
# g9 T1 n! ^9 C6 {7 g& {/ { .num_leds = ARRAY_SIZE(da850_evm_tl_leds),/ q7 o- m+ k# z5 H; L
};1 w8 b: J& ]! i. A4 j6 `
" k* W7 F* G' n9 P
static void led_dev_release(struct device *dev)- p: {4 @" } F. }9 D l- E6 K" s
{
0 R9 I% n. h0 ?' y9 p}; X9 f, A5 e" c6 V, G9 M
3 q$ q" u8 E' X8 P% j% E5 @9 Q
static struct platform_device da850_evm_tl_leds_device = {
* t" s1 U9 M) n .name = "leds-gpio",- o) l( y5 Q# r8 S0 N" X
.id = 1,
* S) [3 ^ B/ t .dev = {3 h: {: C+ a% f
.platform_data = &da850_evm_tl_leds_pdata,+ G( \' B/ ]6 t4 g! k3 M+ [6 i6 r
.release = led_dev_release,8 q8 y0 j* G6 J& E" d8 t. W- r
}
1 k* l9 i& q9 q O};' p( z8 X; ~% ?7 m2 E n+ I, _1 i6 I# z+ d
7 W: v" z9 ?. [5 r. wstatic int __init led_platform_init(void)& D% v& [# X A
{6 m. R7 K1 O2 D) B" X
int ret;' B7 J7 @( c4 i. T0 n3 K
#if 0
$ Z8 r* |& E! [9 |6 }. h4 k7 a! X ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
# n: y$ F) Z0 ^% Z# D if (ret)
9 d2 @; s2 A- i: H. | pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
& R& R% Z/ T& z0 N4 H3 k: j "%d\n", ret);
2 a: M8 W" W# S8 y$ A#endif
6 w6 _6 Y/ ~! ]7 J4 F# ? ret = platform_device_register(&da850_evm_tl_leds_device);& {8 k/ z7 Z$ F/ w
if (ret)
! w t" u+ v; v+ g pr_warning("Could not register som GPIO expander LEDS");, h: }* A: e+ V
else- U' X) e, N1 [
printk(KERN_INFO "LED register sucessful!\n");" [2 l0 Z6 D( V$ [# c7 ]
' G% ?% }6 C" D0 T6 d# m, x return ret;
; S, \" c) B) f0 @. G; K g}
/ I+ l6 n! @* ]# n2 o! h7 P, }8 W; l) x: [0 ` k* x2 \0 m9 e
static void __exit led_platform_exit(void)
" Z" u& N0 _9 e6 F& b{/ ~1 m# |1 z6 f5 b
platform_device_unregister(&da850_evm_tl_leds_device);/ u4 W: P1 V+ J+ `7 P" ~9 K3 H* W
1 x/ B4 y5 m3 s0 \9 B7 u. e( E4 m
printk(KERN_INFO "LED unregister!\n");
7 s& Q( O! @9 j6 ]! T6 ^}
. r) q% I- [. j* z) r" f9 H. s! {1 t8 D$ R2 f/ j2 ]1 w! i
module_init(led_platform_init); Z! P$ \; W* t8 @. y, \
module_exit(led_platform_exit);
; ]4 `$ N- q4 G0 }6 J' i6 k
5 C3 B7 r4 e$ x+ m0 `MODULE_DESCRIPTION("Led platform driver");
5 @4 e* K m1 dMODULE_AUTHOR("Tronlong");
! U& s& U# K; v9 r" g- `MODULE_LICENSE("GPL");
5 v. n' D9 d8 I! h8 R/ B6 x
8 E1 j' V3 z! n# K! {1 s |
|