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; c9 \+ a$ B1 D1 L4 L6 ^# C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：
% Y6 m M/ J' h2 _: B6 s t& d' @5 U#include <linux/module.h>+ W% J# K, y9 C5 U
' J; p9 }* B* H, a2 ^#include <linux/kernel.h>6 p6 S, p# A" ]* |
4 o1 }; [% A. P8 n#include <linux/types.h>
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, h2 ? b4 T2 |) i#include <linux/gpio.h>1 P7 ^4 p3 G9 \9 `5 _
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#include <linux/leds.h>
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3 _/ K1 E) \, T* G#include <linux/platform_device.h>
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#include <asm/mach-types.h>5 G8 Q$ l% {8 u3 T- X5 `7 E
W1 L2 X2 p6 a# k# I4 d#include <asm/mach/arch.h>
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5 e' \7 \ k K: }. c9 N#include <mach/da8xx.h>
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) S2 E3 Q) f4 ~1 K/ W8 s#include <mach/mux.h>
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#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)
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: V7 f! a1 A; r1 ~9 f#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
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% X4 Q( F& D2 _' F) l& i# o#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)
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3 |% X" n' [2 R: t* l$ c1 W#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)+ U0 t d9 M8 Y$ ^: C2 ^
9 S, W& ` p, Y* ?! g#define DA850_USER_LED4 GPIO_TO_PIN(6,12)7 ~0 g0 u1 {3 i# O9 h! v& ] M
$ R4 d& Z4 m- J7 [( O#define DA850_USER_LED5 GPIO_TO_PIN(6,13)
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% d3 y8 F/ e# ~' b+ V/* assign the tl som board LED-GPIOs*/$ @9 @ J4 h5 h
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static const short da850_evm_tl_user_led_pins[] = {
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/* These pins are definition at <mach/mux.h> file */* r* b$ M: f. w* S* b5 @9 m
! ]8 ^1 [5 t& Q6 {0 d% |+ Z9 f DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,DA850_GPIO6_12,DA850_GPIO6_13,5 U3 F# [% Q7 r1 l) j# ^
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1 p: P/ c9 f2 C. V' J2 I ^4 U3 Z( e};
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static struct gpio_led da850_evm_tl_leds[] = {, B7 F7 V3 g) g6 Z8 j2 [* f8 h
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.active_low = 0,
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.gpio = DA850_USER_LED0,8 |% f, u4 t% M& E+ h
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.name = "user_led0",
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8 j2 ~. {/ T8 d' D) ^0 g( x9 P% A+ M, q .default_trigger = "default-on",
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},
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, w, s; l/ i# k5 N- x2 y F9 ?: j .active_low = 0,, E' {6 i+ R& ]6 c" V
4 H' V- L2 p: ] K% W$ R z1 H .gpio = DA850_USER_LED1,
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4 b% Y4 @- d8 b3 V1 U1 M* x5 |- Q .name = "user_led1",: U' i( s8 C. c
: x- J6 Q& C5 K: R9 X: W7 J .default_trigger = "default-on",
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9 e3 ]& i" u3 j" k* g8 I i3 p .active_low = 0,1 b% h' v& w: D/ C# }
0 {. B. K: @ w7 }1 H( v" U# A .gpio = DA850_USER_LED2,1 o. ~& A6 k: i. e; {! _
* J7 B* v3 K. y- o .name = "user_led2",
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2 G" [1 B7 T3 ?, y" p" w1 U .default_trigger = "default-on",
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{
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& _$ o: T3 b6 O& E .active_low = 0,% r5 H% }5 f/ r- }. j
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.gpio = DA850_USER_LED3,3 ?9 H. L; k3 o; T
) ]8 _3 U+ C# h/ p5 w2 N .name = "user_led3",) g' `$ N& ^7 Q: p; |6 T
' n* {# E4 u; @0 o2 v; s .default_trigger = "default-on",4 c2 n w: E ]2 i- V( h% H6 z. J
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.active_low = 0,
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.gpio = DA850_USER_LED4,, d/ W8 x8 ~1 n' l9 B
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.name = "user_led4",0 o& m6 d. Z2 x$ o* J
" g. s4 R% W" q3 D$ L .default_trigger = "default-on",
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( M: Q* z3 z) I* o: P .active_low = 0,
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+ x8 p' Q" j5 \% i .gpio = DA850_USER_LED5,
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.name = "user_led5",* P' t3 n4 R- z1 p
8 V3 X( _% f, x1 {: s5 I& | .default_trigger = "default-on",* }9 X9 k1 \: [' H
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},
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% `7 I3 [% G! a z& A+ h5 v. cstatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {$ a9 y+ W# }% [
) E9 w/ {3 V* r% }1 C* Z .leds = da850_evm_tl_leds,3 K* T( T5 q) g! d
) M9 n5 c4 n" v% P/ W0 g$ W! r! A .num_leds = ARRAY_SIZE(da850_evm_tl_leds), x% t) C+ B% Y
. r2 h0 b, F- l8 W};
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static void led_dev_release(struct device *dev), ]; M! P' O# o" x! W7 V- P
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{
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};+ c; V5 Z, l/ @* e8 s) k7 c, n- L$ n
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9 K" K ^5 L7 Y7 W& z& hstatic struct platform_device da850_evm_tl_leds_device = {
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8 b/ P3 d0 \. f) h5 @2 k/ ` .name = "leds-gpio",0 o/ F! Z% i5 \/ g: A0 ~4 e6 M
8 h# s6 |* j E! E& z+ M .id = 1,8 r% @; T% K' N0 |, [
$ x- s7 t5 k$ `/ D; ]5 [$ g .dev = {
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.platform_data = &da850_evm_tl_leds_pdata,
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8 X0 m6 T# g% B% g# [# x+ {$ I .release = led_dev_release,
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};
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) O) Q0 @" S, c: [9 h# ?static int __init led_platform_init(void)7 d0 ^2 j1 r) Y
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) a6 p, x2 H8 d) W; Y int ret;1 a9 r0 }4 n% a8 P
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#if 0# }0 p4 X: `0 ^3 {; E' c& x
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ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);& c" f5 G6 B; X
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if (ret)
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# s7 b, a4 r) G8 X pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
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9 `1 g; G7 T- j" L' D "%d\n", ret);
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#endif* S( ^; S% _6 s" o$ W' R
( v1 b2 v: I1 q) W7 K ret = platform_device_register(&da850_evm_tl_leds_device);! c0 m: y9 Y; C; g- r( U
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if (ret)
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$ W1 F: S6 U' G. V: ~" g+ d pr_warning("Could not register som GPIO expander LEDS");9 n. d. G1 S0 T/ g
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% o/ j+ e" Y3 ]! M/ R printk(KERN_INFO "LED register sucessful!\n");! v% ~ h3 {7 r/ r( p% ?7 v2 w2 u' A
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return ret;
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static void __exit led_platform_exit(void)
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{
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2 `. M3 p- e A7 x( x platform_device_unregister(&da850_evm_tl_leds_device);
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printk(KERN_INFO "LED unregister!\n");
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: W8 L+ w. P# p4 r7 Pmodule_init(led_platform_init);
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: {) ~$ ?7 r' o& O x$ b) k6 Z2 Emodule_exit(led_platform_exit);
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MODULE_DESCRIPTION("Led platform driver");5 [6 Q: B' P0 {1 G% c# e. F
" m3 c# ~" E9 K$ t" n- oMODULE_AUTHOR("Tronlong");( n: ^2 c& V, l2 q% B5 k+ G8 S
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MODULE_LICENSE("GPL"); |
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|手机版|小黑屋|嵌入式开发者社区
( 粤ICP备15055271号 ) 
发表于 2018-12-14 09:13:56
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