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板凳

楼主 |
发表于 2018-12-14 17:29:27
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* }6 @) t6 O$ M- Z% Y我倒是知道需要编写驱动,主要问题还是地址的映射问题,就是在驱动里面如何来实现地址的调用,我看你们的LED驱动程序里面也没有相关的地址调用问题啊,如下列的你们提供的源码所示:7 u5 z) l: C% `2 w& b# A7 U
#include <linux/module.h>
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8 S* Y" E: c) H; T4 V7 z" W#include <linux/kernel.h>
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" ?* o' M4 f0 K. H#include <linux/types.h>5 |, \/ F# b" y8 z0 g7 j/ z: F; J
) L" _ x: f0 o#include <linux/gpio.h>
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#include <linux/leds.h>
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8 z- j C$ \* N! S#include <linux/platform_device.h>1 B9 c0 E# t. o: j% E
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- ]1 N' P! T) G# H& e( y) w3 I#include <asm/mach-types.h>" P' B% _, ]4 W0 N0 m$ j$ ^
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#include <asm/mach/arch.h>
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/ d" h' ?) M% p {#include <mach/da8xx.h>
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5 M; {) k0 s0 ]9 ?#include <mach/mux.h>8 Z" y6 {+ C/ L0 U! c
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#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)
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#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
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* M! |9 ]5 ^3 o" [; d2 j. Q1 Z#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)
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#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)3 K$ K6 `. g0 T3 S, O" Q& U
- R2 W P7 m; ~) f/ E#define DA850_USER_LED4 GPIO_TO_PIN(6,12)9 a* t5 I5 D9 C* K! x
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#define DA850_USER_LED5 GPIO_TO_PIN(6,13)) m" x. Z T8 I7 W
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% i+ ]& G. ]& `, j* _. P/* assign the tl som board LED-GPIOs*/- @9 s5 t+ Q- A& W) H9 |
L$ x! q/ i6 pstatic const short da850_evm_tl_user_led_pins[] = {
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7 a( N; a' a$ y- N0 d: J2 m% l6 ? /* These pins are definition at <mach/mux.h> file */
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DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,DA850_GPIO6_12,DA850_GPIO6_13,) E9 A2 Z" w$ F" {% Z9 K% E
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};
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/ b/ d3 k( n! `4 r& O. qstatic struct gpio_led da850_evm_tl_leds[] = {) X& l( P6 k( p( e; [+ b6 I e
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{
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3 W2 ?" K0 R, d# ~8 a( T! X .active_low = 0,/ Y' Y$ J( a- d, g( I! F5 N V
4 g6 Y3 [5 g2 S3 L9 N( e2 m- ~ .gpio = DA850_USER_LED0,5 c% N* h; u6 S; Q2 H! X7 ?2 Z: K
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.name = "user_led0",
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.default_trigger = "default-on",8 g0 Y" q% l3 c
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},
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2 j! o- Y: i' j5 `$ L; { .active_low = 0," `; f( r t8 y S4 S( c, ^- j
. @& T$ G z+ [6 B. X .gpio = DA850_USER_LED1,! P& y, x- R7 Q0 q- H! c: `
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.name = "user_led1",2 C/ m: u- m( j% Z8 A
7 d6 l4 A" R9 z v5 {
.default_trigger = "default-on",( t( t" r" T2 e( s- ]" D' f- Y
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.active_low = 0,5 N- {5 d- h; @" W3 m
! |3 D/ o# A4 V5 Q6 y( i .gpio = DA850_USER_LED2," }' Q+ z$ }% h: R t. z
6 N/ d, ^9 i" r) {& H0 l. k .name = "user_led2",: _7 A5 V/ d) l& m7 N
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.default_trigger = "default-on",/ c0 [+ }! I) O- Q" o, `
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.active_low = 0,1 Q: V0 q% o7 R
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.gpio = DA850_USER_LED3,
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$ {" k) w: l- |0 Z) l) o2 b .name = "user_led3",& Y7 k, g; g" d# @7 g ^
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.default_trigger = "default-on",
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},
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{
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.active_low = 0,% Q& V7 i7 [+ x& X6 t; a; Q0 J
' t- u& c: m. g% a# \4 d- H# c .gpio = DA850_USER_LED4,
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; o2 {/ W$ w/ H1 A) z1 ^& G0 Q .name = "user_led4",6 P! G0 x8 y: j0 t# X, \& M
5 [4 _# J9 F1 h, |( V .default_trigger = "default-on",
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},
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# ?- E" u! m! b/ Q- V5 y
.active_low = 0,$ I& }! x0 e4 j+ c
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.gpio = DA850_USER_LED5,
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& S+ f+ I2 G% V M: B' {: V: Y- S .name = "user_led5",
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.default_trigger = "default-on",% v& K( K. i8 W ^. ]4 ~
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static struct gpio_led_platform_data da850_evm_tl_leds_pdata = {. g$ c: k8 j0 `5 i( m* a
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.leds = da850_evm_tl_leds,0 j, O6 x, i# q+ w
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.num_leds = ARRAY_SIZE(da850_evm_tl_leds),% p. Z' i5 ^$ \& R7 x* f: x
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, G: H( d3 q" x+ G5 [) `9 N3 estatic void led_dev_release(struct device *dev)
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static struct platform_device da850_evm_tl_leds_device = {1 m3 x1 O3 _/ k
- C( I) v) g3 D5 ?, A( ?7 X .name = "leds-gpio",
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.id = 1," W7 G3 s( P& C! \) j
! i; k) B C/ z9 v4 l .dev = {1 d8 r; {' k) x# t' f4 u
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.platform_data = &da850_evm_tl_leds_pdata,' i3 X1 W4 P$ A- D
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.release = led_dev_release,
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};
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$ k) Z% J% D7 P+ A' H9 Bstatic int __init led_platform_init(void)
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/ o3 G( y4 U! U8 P, X, m: G int ret;) e! Z$ T/ ~( h, {7 P
) a% d# t9 S7 Z. J |#if 0" O2 X% l" P; z9 b4 a
# Z7 d' E6 G Q5 { ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);# ^5 D9 V+ \. g& b
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if (ret)7 U) L7 G+ I8 z& i9 w6 U- U' `1 r7 Z
$ ?$ j6 Y4 n# N8 i0 J/ F# S3 Y0 b pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
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"%d\n", ret);+ i6 j& ~. h' X5 E
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#endif
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ret = platform_device_register(&da850_evm_tl_leds_device);, b% k" ?1 D4 V5 M" x* J# N8 ]
" F# C1 ?( [% ]+ [2 Z# Q if (ret)
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pr_warning("Could not register som GPIO expander LEDS");
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& n: I/ _( w2 E5 Q$ F# F0 z6 A printk(KERN_INFO "LED register sucessful!\n");
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return ret;. W, g( k! P+ |! x3 X" z, Z
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& G, Z+ S4 L! Q7 Fstatic void __exit led_platform_exit(void)+ E+ s3 x- A1 n0 K3 S* A$ x
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platform_device_unregister(&da850_evm_tl_leds_device);2 ?: x w7 K8 K( o; X4 R3 P
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printk(KERN_INFO "LED unregister!\n");
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! G# ~& v( T6 @. s; Tmodule_init(led_platform_init);( L6 _5 d) W9 n; l5 S8 {
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module_exit(led_platform_exit);( w% e4 O" y7 M8 S
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4 f6 P$ i7 A% [9 l! |1 ?MODULE_DESCRIPTION("Led platform driver");. V1 E! L( X X' l, L0 u9 |
2 u* v# R( ^% K2 kMODULE_AUTHOR("Tronlong");
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MODULE_LICENSE("GPL"); |
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