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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
5 g6 a* _+ {( K( B1 [, x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:$ S! z9 }% }' Z9 X$ P4 R' N* R
#include <linux/module.h>! s. @* l5 Z+ h! r9 f, s3 {
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#include <linux/kernel.h>
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3 @; v% h/ A2 y& i/ r) N3 _#include <linux/types.h>, `+ S; Z T7 A" e8 h
/ k6 L: I! @6 T( }#include <linux/gpio.h>4 u9 e K# X; o) b9 s( h/ h
! }7 S1 `" C R. e#include <linux/leds.h>
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' s) J2 ^2 u l#include <linux/platform_device.h>
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2 G1 w; t; Q* Z! R7 W9 m) W#include <asm/mach-types.h>1 Q3 ~+ T. D* K& M. D8 H S+ K
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#include <asm/mach/arch.h>2 {) q d. N/ c2 y. Q7 I/ S; M' N1 H
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#include <mach/da8xx.h>
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#include <mach/mux.h>
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- {, ]5 J3 \- u% c0 f% `#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)
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& Y: d3 x7 \. S% O& g' f2 D+ F% R#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
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/ [# M' v) y3 G* o, z A8 d# T#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)( N$ [1 x0 |. ?! X4 c# T, k5 D1 I& L
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#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)
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#define DA850_USER_LED4 GPIO_TO_PIN(6,12)2 {+ X- C( E4 T B; Z
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#define DA850_USER_LED5 GPIO_TO_PIN(6,13)4 _: B! t* h2 F
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$ k4 \& O0 h1 M. b/* assign the tl som board LED-GPIOs*/! R0 f% M% b, t% v3 X+ w; }# V5 N
5 h2 y- F1 N. L; r$ P+ Ostatic const short da850_evm_tl_user_led_pins[] = {
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! D( e' N+ V' b) K4 E7 _# [ /* 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,
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};! C+ Q# F7 A3 D3 |, n8 _
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, {# C6 I, {2 D# s9 A4 Lstatic struct gpio_led da850_evm_tl_leds[] = {
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.active_low = 0,5 w5 Y/ ], J6 \3 A; ?
0 C& u6 U& T6 @% u; O6 Y* @ .gpio = DA850_USER_LED0,9 N H3 A. S% X% i# \( e6 p" z7 j
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.name = "user_led0",' f/ N, p) H' P5 ~, l
8 o! Y& W$ z7 m; Y! n .default_trigger = "default-on",
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{
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: l( ?% i; [& J) d6 k$ [ l .active_low = 0,9 \& h+ ^" @1 U8 ]9 w
7 e" U' N1 i- M# D3 F5 l; o .gpio = DA850_USER_LED1,3 ~1 W! D2 C! P
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.name = "user_led1",
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.default_trigger = "default-on",; u, {- X: R+ U' a' J
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; J! J! \7 K8 p( k/ u' l2 E5 Z .active_low = 0,
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; N( ~" @2 n$ D0 G: X$ M .gpio = DA850_USER_LED2,
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/ d6 h1 j7 x! C .name = "user_led2",8 L4 z, e; V r! r
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.default_trigger = "default-on",
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.active_low = 0,* R; V+ S/ s ^1 m/ F- v$ u; d2 l
8 s/ h( D2 n' ~; i6 L0 W' { .gpio = DA850_USER_LED3,2 m! X3 v3 f3 d
l9 }/ u/ I4 i .name = "user_led3",
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.default_trigger = "default-on"," M: ~2 [; B' ^0 { m
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{
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.active_low = 0,( o2 S* W# B# a8 k$ h2 L, I
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.gpio = DA850_USER_LED4, R1 I o, ^. Q, }4 y; U2 i
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.name = "user_led4",8 c1 U6 G; h( g, v0 k
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.default_trigger = "default-on",
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},
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) w4 q, B7 n- Q6 `0 g, ]6 N .active_low = 0,# n1 E+ q; Z& C+ u
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.gpio = DA850_USER_LED5,% r! m3 M( n" `
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3 p. i/ F3 b; V9 F6 ? .default_trigger = "default-on",; l1 A/ M4 I! }5 q# u$ c, J5 o
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};
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$ T) X+ h1 z- u, Ostatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {% U7 \) B/ O& Y
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.leds = da850_evm_tl_leds,( t$ h, L! s ]+ g
. D, q; s7 [- Y/ b$ M5 ?5 v .num_leds = ARRAY_SIZE(da850_evm_tl_leds),. H6 r, J' v4 `6 t7 G. {
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V" [9 n4 J6 J x1 ~static void led_dev_release(struct device *dev)+ Q' H1 B8 }* b
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};
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static struct platform_device da850_evm_tl_leds_device = {* @4 O- x1 m6 |3 t
2 U# R2 n' i4 M) N% n .name = "leds-gpio",
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.id = 1,. L" f5 }7 _) v1 ]$ h
1 n, T1 r0 i# {5 G, g .dev = {% E5 o4 s6 }+ C3 X
$ F6 @ }. e9 V' W5 P1 @* [ .platform_data = &da850_evm_tl_leds_pdata,( n# Z# ?, A% u# z" m* t
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.release = led_dev_release,
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, @7 e$ X. i+ M5 Q# i2 C/ B8 kstatic int __init led_platform_init(void)
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{
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int ret;
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#if 09 Y0 @$ x; V* z- |% l1 K% z/ B3 @
" A S% V5 U; C' E5 m ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
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if (ret)
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+ P. Z8 Y Y0 G: Y pr_warning("da850_evm_tl_leds_init : User LED mux failed :"+ F( y/ o- j" [. O3 D3 t+ @# D
4 i% o. Y6 ~$ V+ l; D; k "%d\n", ret);* u& [- z- \( @: |* V: U. T
; Q' V) s+ l0 c1 Q#endif
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ret = platform_device_register(&da850_evm_tl_leds_device);
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if (ret)
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pr_warning("Could not register som GPIO expander LEDS");! s2 `0 N9 N, w/ z
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printk(KERN_INFO "LED register sucessful!\n");/ R9 W) T) L) B/ d9 w
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% n' a& }. i( A return ret;
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! l5 l; S% |, k/ t1 q# o" |static void __exit led_platform_exit(void)
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. m4 q8 ?' F9 n& s! O' M- } platform_device_unregister(&da850_evm_tl_leds_device);
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printk(KERN_INFO "LED unregister!\n");1 V3 t7 Y% W" M5 @
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% }% K0 ~/ n0 e3 [module_init(led_platform_init); ]$ Y% S: ?% { s+ p: i9 T
- F+ Z4 I2 n" w1 ^8 {2 m L4 ~module_exit(led_platform_exit);
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, W9 j, l$ W/ r& dMODULE_DESCRIPTION("Led platform driver");9 @( E# X1 p: ~' ~8 }5 T9 S( d
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MODULE_AUTHOR("Tronlong");: h" y2 j2 p0 P
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MODULE_LICENSE("GPL"); |
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