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板凳
![](/template/jcboy_light/img/ico_lz.png)
楼主 |
发表于 2018-12-14 17:29:27
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4 q1 x& S5 _3 F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:4 m2 ]; d. A! Q, z) U
#include <linux/module.h>! b$ V0 B5 t0 w4 Y$ w( j+ Q
' k/ W" d) z7 ^#include <linux/kernel.h>: t: }2 F& E' [( b' v& }
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#include <linux/types.h>$ J: @% z/ S; R8 H3 v. r/ g. k* U
( n/ i' E2 [# D#include <linux/gpio.h>
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#include <linux/leds.h>: Y: @3 v- v* \! m9 t
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#include <linux/platform_device.h>" ?; D. S7 m/ L0 H
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, H d+ _8 y3 s6 `9 X. R' ^1 B/ h#include <asm/mach-types.h>
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#include <asm/mach/arch.h>' J/ `' W* Z/ D9 T; g* E. [
2 u7 B9 D3 b) U: X M2 [0 K#include <mach/da8xx.h>& e# E- i5 ?$ `3 g
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#include <mach/mux.h>! W; S" H% Q: o& r
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#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)0 @% b* n3 F" X- q; `
* o" R( c' H) B# _; b. {, G, F#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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#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)3 y. e' b. e$ N8 y( X* b& l! W( r
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#define DA850_USER_LED4 GPIO_TO_PIN(6,12)* j# j( d) Y+ A6 t$ t
% B2 l( w4 f2 e# _#define DA850_USER_LED5 GPIO_TO_PIN(6,13)
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/* assign the tl som board LED-GPIOs*/8 x* j6 T# _$ z5 T
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static const short da850_evm_tl_user_led_pins[] = {# ]0 D, {& C" ]* b+ S
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/* These pins are definition at <mach/mux.h> file */
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1 Y5 P: t/ R+ t# m! c, h+ o4 p DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,DA850_GPIO6_12,DA850_GPIO6_13,; T+ \4 q% u5 _+ L
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) A+ L: B" i+ M& p* [. ?+ X8 r5 u& P/ fstatic struct gpio_led da850_evm_tl_leds[] = {
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.active_low = 0,8 S% ^/ w# d' r6 z- p6 Y; F5 N. x
1 f; L( ]0 Q) L0 H/ ?8 f3 w. W .gpio = DA850_USER_LED0,
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- e2 I# A+ D5 C9 T1 a3 Q6 C .name = "user_led0",
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.default_trigger = "default-on",0 Z9 g; B9 w8 j" v
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.active_low = 0, K0 _2 G: B7 t, n' \( h
9 M( I# [& X/ e; J: U7 T .gpio = DA850_USER_LED1,
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.name = "user_led1",3 P; ^" i3 b0 d) \, \: A
2 b7 d7 @$ J c9 Z/ t .default_trigger = "default-on",
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},
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$ ? j* n" a& O. o .active_low = 0,
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.gpio = DA850_USER_LED2,2 W& n3 p& q) Z7 z( v
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.name = "user_led2",
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.default_trigger = "default-on",% C0 p6 ~ G2 ]3 o# g& q- Z. |3 g5 o
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{
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3 g x% T; k3 m2 N- Q% n7 X" N# G .active_low = 0,2 o( u2 }. p e. ]: ?
L0 G7 g( S @+ f .gpio = DA850_USER_LED3,# b# {0 A* j, v+ H7 b, ^
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.name = "user_led3",
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.default_trigger = "default-on",/ s7 g9 }% \, K+ A# l" g& M$ q- h( L
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},
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.active_low = 0,; I4 k: Z. _' O8 E
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.gpio = DA850_USER_LED4,1 V4 p! P' ?/ S9 S
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.name = "user_led4",% g) f4 Z2 V7 n8 o! b) `- x) l5 T
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.default_trigger = "default-on",. `+ |: L! D/ H. ~( [" a" d* b$ O
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7 C, K! }7 l5 J% {$ r, n% B .active_low = 0,8 O! J- S7 ^2 E! ]* H% j
1 y1 k, N* a: l, W/ [5 d .gpio = DA850_USER_LED5,6 U, q8 t+ l# O
: ?6 K5 e: X" u) k3 } .name = "user_led5",' }. j, H. [0 e0 m7 v
0 t7 _ i% c1 O, H+ J# k5 k .default_trigger = "default-on",
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},
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+ j% S% k/ S4 D& g; }# Ustatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {! G" p! ^5 f, C7 |" Z' w& U5 j
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.leds = da850_evm_tl_leds,& R4 ]+ R6 {( y7 H
$ ]9 h6 j1 ` W1 | .num_leds = ARRAY_SIZE(da850_evm_tl_leds), ~! q# g( T# ~
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};
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static void led_dev_release(struct device *dev)
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0 {5 v: ^* F% f0 W{
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};
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; u+ {+ u& Q# x5 G2 t& Lstatic struct platform_device da850_evm_tl_leds_device = {% U7 f! l( g$ P/ S5 V5 j
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.name = "leds-gpio",
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! B' g7 }* h: e/ G% O0 S .id = 1,& Q! l. P9 L2 M% Y" r$ p3 X. s' [
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.dev = {
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; _* U) G# e" \. n% O5 S& \& N .platform_data = &da850_evm_tl_leds_pdata,
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.release = led_dev_release,
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$ y7 S4 R" z: C; V& v4 ]static int __init led_platform_init(void)
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; S/ ]$ L' s$ W" X4 {3 Q int ret;
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# C4 T6 S! T6 [#if 0. B2 U3 [' A, K/ z# ?4 U
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ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);* [7 y) E* [$ Z, {; a
4 U2 q/ `: |0 K8 U. L if (ret); m4 p" S4 ^3 G5 N( n2 w8 a# k1 l
, r" r+ T- ~' s/ r/ W# Z, i* t pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
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"%d\n", ret);' Y# {5 y) T3 F4 \! { d3 p) i8 w
! k) n- J! R- A( t5 J9 y#endif! U) H3 K( o) b7 C: K9 e1 c
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ret = platform_device_register(&da850_evm_tl_leds_device);: Z( ?# @" I/ L; u) R8 Y$ t! E; d
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if (ret)
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3 c. W" `7 y# ]8 A pr_warning("Could not register som GPIO expander LEDS");! k: w# B% ?( k, l9 h
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" f7 k0 D- @+ ]) N printk(KERN_INFO "LED register sucessful!\n");
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return ret; a o1 |( |( ~4 H+ @; V0 S
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static void __exit led_platform_exit(void)4 e6 a3 i% u, _/ I
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( X+ l9 W9 o( T- ^ platform_device_unregister(&da850_evm_tl_leds_device);8 a0 Y6 H+ N$ |. h) D7 h( K& m9 }
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printk(KERN_INFO "LED unregister!\n");
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* I# @! E: T+ } Omodule_init(led_platform_init);5 C a2 Q+ d$ V( w! `* e
' Y6 p% ` }+ R2 |* A' Omodule_exit(led_platform_exit);0 T4 i+ n: D/ j' }2 P
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MODULE_DESCRIPTION("Led platform driver");' r6 ^: }# U6 D! a& b( p
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MODULE_AUTHOR("Tronlong");! d' X: r# q8 [4 V, P
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MODULE_LICENSE("GPL"); |
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