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板凳
楼主 |
发表于 2018-12-14 17:29:27
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只看该作者
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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:" q+ ?# N/ P- V* n% @5 E u( X
#include <linux/module.h>* m) {* p( e- P. `1 I
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#include <linux/kernel.h>
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1 X6 W5 T' e o& N#include <linux/types.h>
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' D/ x5 X& J# {# v+ j#include <linux/gpio.h>6 B" s8 O" _5 s! l
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#include <linux/leds.h>) T, n% m$ X1 q9 c4 b' I
5 D7 E0 q9 p; i w#include <linux/platform_device.h>
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7 G. k, y& b, y# p#include <asm/mach-types.h>
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#include <asm/mach/arch.h>& q P5 j3 }- e/ b* i- h/ ]
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#include <mach/da8xx.h>
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/ s4 i* o4 U. w A#include <mach/mux.h>
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#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)! y8 }# q- [* @6 T
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#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
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0 i$ [! U$ T) i/ _% W9 p#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)
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#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)% T' y8 n( k& Q6 a2 k( G4 G
1 G1 ~7 k# G: o8 m( F/ X; k#define DA850_USER_LED4 GPIO_TO_PIN(6,12)
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#define DA850_USER_LED5 GPIO_TO_PIN(6,13) y$ A# C6 O: N) c7 w1 C
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# B& |" V; F& O( y. W$ U' I/* assign the tl som board LED-GPIOs*/
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% B! b3 D( i. k8 \/ xstatic const short da850_evm_tl_user_led_pins[] = {
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# U; H# q! J. l; @ /* These pins are definition at <mach/mux.h> file */# U! W: m1 ?" f( E. D
5 X4 c$ s) |! o* N- Q. I& C! t DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,DA850_GPIO6_12,DA850_GPIO6_13,9 S5 T7 ?% E& G( B
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static struct gpio_led da850_evm_tl_leds[] = {& v+ W4 I9 O* Y5 w3 z Q, W+ Q
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$ q( G/ H# w. r; @! | {5 Z .active_low = 0,0 B7 A7 E' \/ m, u. j
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.gpio = DA850_USER_LED0,
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.name = "user_led0",
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.active_low = 0,
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.gpio = DA850_USER_LED1,7 f$ L# v! k$ @' T1 g" q
0 C3 `, x7 I3 n7 W: O B .name = "user_led1",
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.default_trigger = "default-on",
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{
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( C9 ]7 V9 Z" Y4 F .active_low = 0,$ h# ]4 t* E: b5 I1 t( y# @
- s6 B9 q! O1 r9 s .gpio = DA850_USER_LED2,. T5 i8 x5 n8 k X: @# s
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.name = "user_led2",4 Z- _9 k( U( ]2 x# m
i+ j! W% J4 O8 O .default_trigger = "default-on",
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! m6 c& R* A& U) C% p) i .active_low = 0,
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.gpio = DA850_USER_LED3,
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5 ]; K7 I/ V6 J$ }8 k A% L .name = "user_led3",
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.default_trigger = "default-on",1 Z! x# T5 b; a N$ z3 x. R
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},
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* W( _5 A7 R0 x* _; z {
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.active_low = 0,: K1 D! E& N3 k) C1 p
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.gpio = DA850_USER_LED4,8 H; u \ A5 [/ \9 S! G6 b
% @# \, ` P- F2 e) M .name = "user_led4",
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# @6 R+ m+ f% U/ |6 h* ` .default_trigger = "default-on",( ]8 H+ o) I6 U* U% x$ u; k3 o Y7 E
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},
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.active_low = 0,
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.gpio = DA850_USER_LED5,
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.name = "user_led5",
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.default_trigger = "default-on",
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static struct gpio_led_platform_data da850_evm_tl_leds_pdata = {, O5 F! F* q% r+ s3 n+ J2 M8 m
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.leds = da850_evm_tl_leds,+ L1 G$ [3 d; e6 K* d, u! H
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.num_leds = ARRAY_SIZE(da850_evm_tl_leds),8 ]' s2 w+ K2 |- l
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) C) c2 _3 d0 p0 t0 Z( f2 V& tstatic void led_dev_release(struct device *dev)3 W1 D. e$ ~: C8 f( M: @6 r
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4 x8 B, b" I# Tstatic struct platform_device da850_evm_tl_leds_device = {# [5 q' M( f" V6 c' ~: X; G
6 Q- a! O" |) G( e" `: o% C7 r .name = "leds-gpio",8 k2 s! S/ ]( @# f% Q
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.id = 1,
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.dev = {- U6 d! F$ @3 r& T' o
/ z2 X6 Z9 G7 O' ~$ o+ k- ~ .platform_data = &da850_evm_tl_leds_pdata,
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" e+ o0 j6 J1 |5 K# H1 Z .release = led_dev_release,
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}
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# l" k% v, o3 p) S& d+ ~static int __init led_platform_init(void)+ a! W! T1 g% X# N/ [8 [- R
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{
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1 `& {+ f1 I* N) n int ret;9 k2 a2 B8 }" R7 _6 G' V" t% X
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ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
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if (ret)
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pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
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3 a6 V+ O9 w: J& v "%d\n", ret);
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" {- J7 k& W) m& m- ~+ k# q#endif. W' j- y# @% R$ P" d8 h$ E
4 I& m& y7 w, c- `7 T& d+ v ret = platform_device_register(&da850_evm_tl_leds_device);+ I$ d" k/ C; d/ a
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if (ret)2 L% d: f6 M7 g
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pr_warning("Could not register som GPIO expander LEDS");
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# J' X) G+ @5 z# f6 d$ M5 d printk(KERN_INFO "LED register sucessful!\n");
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return ret;
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; F B' c7 R% L0 ?; zstatic void __exit led_platform_exit(void)
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{
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platform_device_unregister(&da850_evm_tl_leds_device);
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printk(KERN_INFO "LED unregister!\n");
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module_init(led_platform_init);
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module_exit(led_platform_exit);
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MODULE_DESCRIPTION("Led platform driver");
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MODULE_AUTHOR("Tronlong");
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* N4 m) V0 q( V3 i/ i/ j" FMODULE_LICENSE("GPL"); |
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