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板凳
楼主 |
发表于 2018-12-14 17:29:27
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2 B! S+ ]1 l0 M0 p7 _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:( m4 ~' W W9 h+ y d+ ~
#include <linux/module.h>
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; J; X$ b( r- G#include <linux/kernel.h>
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, q. D* J7 b* n7 D ^$ ?7 i1 D* B#include <linux/types.h>
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#include <linux/gpio.h>/ N' c! p- p+ H7 ]2 A
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#include <linux/leds.h>
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+ e8 {8 p: U4 i/ y# \9 j# n#include <linux/platform_device.h>+ `+ Q6 C$ f0 _8 N/ _
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#include <asm/mach-types.h>$ l2 `7 ^4 Y8 q7 W# M% Z
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#include <asm/mach/arch.h>8 L" p* K% F J/ M! y
( d5 }" t8 C1 \; E3 {' X#include <mach/da8xx.h>% g& I, U, ]9 j; y8 Q( c
. o2 g; h1 q9 {9 @' ]# ]#include <mach/mux.h>
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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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#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)
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2 R6 E# l- T* [6 F& \7 ~3 J3 o" f#define DA850_USER_LED3 GPIO_TO_PIN(0, 2), c, S# c4 [& X% X; s; I' R
9 U9 s; c4 p- L8 V7 d& }- I4 F" c#define DA850_USER_LED4 GPIO_TO_PIN(6,12)
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@+ d. A) g" p& q; n0 `5 a7 f- L#define DA850_USER_LED5 GPIO_TO_PIN(6,13)9 J* [' j( d" v
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* S& d I9 l. I7 T( J; N, |/* assign the tl som board LED-GPIOs*/
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static const short da850_evm_tl_user_led_pins[] = {
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- l/ {7 r9 \' i* \# }6 d1 L( c; f- i! T /* These pins are definition at <mach/mux.h> file */$ v1 G3 F/ V0 R" B7 z
! n/ z9 T0 M! ?: I- [' k2 D6 Y DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,DA850_GPIO6_12,DA850_GPIO6_13,% A) r ?7 F) C3 l
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9 D2 Z4 s$ W" \/ p};
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' s; Q, }* ~7 u rstatic struct gpio_led da850_evm_tl_leds[] = {
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{
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1 F( T# P8 m+ Z4 _. o .active_low = 0,
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( d2 }$ _4 C7 M [ .gpio = DA850_USER_LED0,: U8 H. Z( E7 i( k
: }8 ]" S7 b: n/ ^- L .name = "user_led0",
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2 |) ~0 _8 z4 @1 C* W" U .default_trigger = "default-on",6 V2 @& V6 D! O' H" y- ?- _
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},
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{
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.active_low = 0,
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2 w( h2 n ^, B( b .gpio = DA850_USER_LED1,
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.name = "user_led1",5 q, u' b( N) C1 D2 U6 r- T
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.default_trigger = "default-on",9 O3 M8 x8 r6 ?& f3 L; G
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{
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.active_low = 0,
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.gpio = DA850_USER_LED2,
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, v, J8 W" n2 N- B .name = "user_led2",
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7 Y- r, O3 R0 d3 x0 v- y .default_trigger = "default-on",' C: d& R. O# H- v7 U
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/ G7 v/ x, [/ O .active_low = 0,
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! Q4 e' c* f' r: {/ o .gpio = DA850_USER_LED3,
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6 ^% T/ i2 u3 E( E6 d g, T6 X1 u .name = "user_led3",8 _* Y. C9 v3 Z$ p
$ _9 b, ~4 m `0 o, V& m .default_trigger = "default-on",
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: R2 R, b( u, N# Q3 ] .active_low = 0,+ g# @$ |4 e. Z- {- s* _; h
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.gpio = DA850_USER_LED4,
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: d9 p- d- O. [" u e+ G1 Y3 }9 m .name = "user_led4",
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+ u v% y: V* q3 P .default_trigger = "default-on",, } t) S4 {" t4 i/ B- j
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{
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.active_low = 0, G' w+ y( P; u) n
% U2 ^9 [8 G/ ^" q .gpio = DA850_USER_LED5,
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5 b$ |! d! k$ ~% [4 c2 h" [ .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 = {
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1 u( G( A3 E* {0 K .leds = da850_evm_tl_leds,
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.num_leds = ARRAY_SIZE(da850_evm_tl_leds),% n3 M \5 ]2 \5 |
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};
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+ i) X2 V7 H: I4 x4 z1 istatic void led_dev_release(struct device *dev)
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{
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static struct platform_device da850_evm_tl_leds_device = {5 V, Y# W9 o7 B
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.name = "leds-gpio",
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.id = 1,) D1 m4 o7 N( G/ y0 p
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.dev = {6 P0 @& d- `: q4 l" \' b
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.platform_data = &da850_evm_tl_leds_pdata,3 T/ J- H( q: d, ~7 _! ~
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.release = led_dev_release,1 T4 {$ @: F( P5 P7 z; x' W: v
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static int __init led_platform_init(void)& F" O, A* B9 u/ h* t. {
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{
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4 Y% S2 s. n! M2 ^0 J+ X: ^! Z int ret;
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#if 0
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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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"%d\n", ret);
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* K0 j) f# f. d8 ?5 n m: S6 l#endif
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" Y( n. K. i) u" z' `- |% L ret = platform_device_register(&da850_evm_tl_leds_device);9 K; }4 |8 ~& O, G3 H5 F
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if (ret)
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. s1 z/ j' k0 p& j pr_warning("Could not register som GPIO expander LEDS");
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else! |9 `5 G/ r4 |+ z5 d8 u
$ Y0 H2 O! m. }0 _( R" Y9 ?; [7 I printk(KERN_INFO "LED register sucessful!\n");
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2 a) ^7 M0 [5 @9 a/ v return ret;& U- M8 b1 c8 v3 S8 }, p
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}
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m* M3 b' G9 B; ]4 @; z' Estatic void __exit led_platform_exit(void). k1 v0 D+ v+ L; Q& F, m
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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");" w7 W5 M# ~# B5 ]8 p3 I. Y
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( x& W; c9 E" P5 s! K- u" }- Umodule_init(led_platform_init);( K( r8 _; E1 n) ]& C) Q
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module_exit(led_platform_exit);
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7 U% o- z" [, p: k+ J; ZMODULE_DESCRIPTION("Led platform driver");
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& `' q' Q, z" y/ ]" V! S$ v5 FMODULE_AUTHOR("Tronlong");
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MODULE_LICENSE("GPL"); |
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