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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
7 Q1 _, F. T8 R2 G! b" N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:) R `! Y; i# @3 [
#include <linux/module.h>1 F$ E( o Q! ^& N( {
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#include <linux/kernel.h>
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( v( p" y* j, x#include <linux/types.h>
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#include <linux/gpio.h>0 ?0 [" y4 z7 n( k% V: _% I
; Y- C9 Y" o, _; b" j* @6 d' B#include <linux/leds.h>
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; O% D, w l+ ^. M( L7 Q; C5 _#include <linux/platform_device.h>
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* d* e4 K7 _( n/ z0 e0 w#include <asm/mach-types.h>. l, |( C2 @' K+ S, y9 ~/ b) m
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#include <asm/mach/arch.h>5 s9 P, [7 o; a$ b
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#include <mach/da8xx.h>2 J3 s0 {; Y9 ^( k) w0 m4 ~
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#include <mach/mux.h>
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#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)
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" i( t' y4 b1 ~- [# d' d! x; B+ J+ n#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)9 e+ N+ B {0 w2 c2 |5 z1 y
: \, @; z; } J3 @$ H/ a#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)- I5 a" D1 \7 x; j
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#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)$ @' a9 y8 s' G0 \" w+ y* s9 C# ^
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#define DA850_USER_LED4 GPIO_TO_PIN(6,12)! T+ l& J0 P. \. P
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#define DA850_USER_LED5 GPIO_TO_PIN(6,13)! }; o) w* l2 b; r3 @) r, A) m" b
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/* assign the tl som board LED-GPIOs*// C0 L/ s. M3 l6 J+ a# S# T
' X' N' R4 w& k2 \static const short da850_evm_tl_user_led_pins[] = {
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/* 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_13,1 s. G$ r! L3 E8 v3 d
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};8 M: U. }! P" h! y3 `: e; q P
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5 r, @3 F. q& D9 D4 ystatic struct gpio_led da850_evm_tl_leds[] = {
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{
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.active_low = 0,0 }5 i9 }$ j; q6 D6 ^
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.gpio = DA850_USER_LED0,! Q! ]5 i: T9 C9 R
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.name = "user_led0",9 D) Y$ r$ J2 A! J- X
* O8 z |1 [7 e, [6 n2 i# P: m .default_trigger = "default-on",
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.active_low = 0,
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.gpio = DA850_USER_LED1,7 Q% z9 l% I" N5 _6 i F# ^
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.name = "user_led1"," `9 t4 l/ o( w
1 X; \( E; M5 C .default_trigger = "default-on",
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{
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" c, P0 A8 O& ]7 V4 N. b6 T2 Y .active_low = 0,% z! E- s- E) I/ X8 A
6 E4 G! i v- v# C4 D2 A9 p+ o .gpio = DA850_USER_LED2,
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.name = "user_led2",/ q7 \+ B- t, N$ [' J
" m0 ^ d: w: f1 G .default_trigger = "default-on",
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! {/ F9 j1 ~) [; E& j) @ .active_low = 0,( \ G% v( U; O# D; A/ c7 F5 a5 {
1 l* S# q+ C+ H* `0 g8 v0 n5 C) w .gpio = DA850_USER_LED3,
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2 [5 q2 v. i! r6 d .name = "user_led3",
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7 p5 |8 I/ L' R2 d0 \' S) g$ Q+ i+ { .default_trigger = "default-on",5 Y8 b; m7 d0 a# b
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.gpio = DA850_USER_LED4,/ N: ~% N# \3 q, W- x
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.name = "user_led4",
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.default_trigger = "default-on",
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{
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& e. p" _" Y3 N8 Y5 M+ T .active_low = 0,, Y9 C4 f- [" a; S9 l+ a
4 @' U( o+ K$ O! Z- W. D .gpio = DA850_USER_LED5,! z( ~$ |& \$ A+ U8 R( u' o
% q: v/ Y" L6 a5 q4 l. j2 m" y: Z/ j .name = "user_led5",; }4 V5 Q: p. J. V( U' K' i# ~
6 x& u! k7 C0 B$ B .default_trigger = "default-on",5 Q( V' }3 X4 m
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& O8 G0 I" I+ d: sstatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {: z# I& r! }- z! d5 `6 l3 H) o* s
- Q7 Q* ^) Y" Q+ a/ j) S+ g* R .leds = da850_evm_tl_leds,
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Y' a9 f: Z# u! ?% `: M. q) Y5 n, U. _ .num_leds = ARRAY_SIZE(da850_evm_tl_leds),
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};
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9 A. D/ X; l8 N8 ^' \static void led_dev_release(struct device *dev)$ E; U7 H, F, N+ N9 `4 Y, s: z
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};6 Q) B z# Q5 N1 v/ A. [1 Y
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static struct platform_device da850_evm_tl_leds_device = {
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.name = "leds-gpio",
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.id = 1,0 l2 j3 E1 c5 ~$ {
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.dev = {- N! h3 B+ |' J, N% f- T) s
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.platform_data = &da850_evm_tl_leds_pdata,6 d3 K$ F! d& n5 Q. ]
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.release = led_dev_release,
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8 q1 e' M$ W) x# f4 Zstatic int __init led_platform_init(void)% P( N- A k' Q9 Y
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' b# f: V- t0 O int ret; Y' O4 k* {0 k c/ D& y5 d3 U: [
# `2 G' r2 w7 l _5 }! d* w( w b#if 0
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! {' ^+ s/ V$ H9 b" Y ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);9 [2 A( L+ U3 P2 [2 ^, e" N9 \
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if (ret)( d# n" a# V' H$ k% H( n0 n
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pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
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! b& v f/ n' `# K+ \ "%d\n", ret);2 X# @' z( O# S/ y
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ret = platform_device_register(&da850_evm_tl_leds_device);( D& I; [2 e5 W8 e& P
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if (ret). o! a% @3 u5 O7 z+ H- Y
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pr_warning("Could not register som GPIO expander LEDS");
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printk(KERN_INFO "LED register sucessful!\n");
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return ret;. F3 a" t' I& l$ P
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static void __exit led_platform_exit(void)" y. V4 F- u4 q9 ~- M* ^2 ]5 ]0 h o
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platform_device_unregister(&da850_evm_tl_leds_device);' I. W+ \0 I! q5 j% C$ P
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printk(KERN_INFO "LED unregister!\n");, C) L# U4 `- m( N5 F$ }! d: X; X
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module_init(led_platform_init);1 i5 p( Y1 k! e7 a' y$ x" u
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module_exit(led_platform_exit);1 {8 s5 d! k9 _6 R+ A
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+ e4 q5 ?, a' `5 u+ YMODULE_DESCRIPTION("Led platform driver");, J' s4 o; E: @9 Y2 J( H% O0 v, \/ H
- U& O! Q- B/ K3 u+ ]2 DMODULE_AUTHOR("Tronlong");
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& T% p8 Y+ C( @& |$ eMODULE_LICENSE("GPL"); |
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