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板凳
楼主 |
发表于 2018-12-14 17:29:27
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4 `$ n _9 P" A% G' V% I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:* [' a0 F3 { J) S* E6 G9 y3 a
#include <linux/module.h>
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" R6 H8 q2 ]* R7 S% y#include <linux/kernel.h>
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1 u W* E( H% W6 d# R& I$ S#include <linux/types.h> h7 L6 x- w8 U/ w, m: C& B
& L! G' r# B" y" ~6 b' \ Q#include <linux/gpio.h>
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( z: X. ~9 \) G8 b G#include <linux/leds.h>
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#include <linux/platform_device.h>9 X$ h2 y+ c+ y7 I" _/ L, w
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#include <asm/mach-types.h>
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; a$ c: {8 G* f# F/ @& S& i$ t#include <asm/mach/arch.h>* W& d+ K7 y/ M2 h/ Z8 v1 l! A
3 K& i9 B; n: L6 N; S#include <mach/da8xx.h>' i+ l1 s, h/ G* e0 M2 W Y$ b* ^
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#include <mach/mux.h>0 q" b: |- c2 W& ]% `' {& N" e
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! L, U8 r/ K& o$ G* A2 K; d#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)1 `0 B, n) S. S# c8 r `+ Y/ _
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#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)1 Q4 Y9 `9 u9 W! `0 @6 h
2 i H, ~/ ] f* p$ V( ^#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)% K4 B2 Y8 l1 F; H: ]7 M& U
/ w8 q% ]$ h- _! @- T#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)
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#define DA850_USER_LED4 GPIO_TO_PIN(6,12)
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: f3 J2 I* X+ V4 }#define DA850_USER_LED5 GPIO_TO_PIN(6,13)
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$ d1 x" g; g! f/ e7 f/ l/* assign the tl som board LED-GPIOs*/
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static const short da850_evm_tl_user_led_pins[] = {
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0 i+ i$ v7 n( Y) x J: ? /* These pins are definition at <mach/mux.h> file */$ |( G& ?' [: s/ j
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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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};
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static struct gpio_led da850_evm_tl_leds[] = {+ W. _/ m/ {" V( [- P( d
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.active_low = 0,& `. d P* T. ?7 ?$ t
9 G( y$ {6 ?8 @8 e6 r .gpio = DA850_USER_LED0,2 z5 r/ Q6 B5 N; f
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.name = "user_led0",
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.default_trigger = "default-on",
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{
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4 a2 f' y2 G* L' W3 M; _ .active_low = 0,
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.gpio = DA850_USER_LED1,
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r8 T A! M) A2 H' K/ C$ u .name = "user_led1",! h+ O: U* t T, e4 E; D
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.default_trigger = "default-on",+ x( |% X1 t- Z- F# P, ^/ m
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},
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{
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.active_low = 0," d7 Z* T6 k5 [* C4 n2 ^
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.gpio = DA850_USER_LED2,* C: E% Q, m& R n+ {, W& O
9 Q9 g- Y0 E3 O .name = "user_led2",
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% }* d) ?5 C5 S4 a .default_trigger = "default-on",
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, D! b& i, r5 z. M" X6 E. r6 z .active_low = 0,5 F' @& S0 b0 D+ Y, O; J
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.gpio = DA850_USER_LED3,6 l C i8 b2 s( k" b5 j& p
- P+ {- s" t2 ^/ [9 J' c .name = "user_led3",9 j) K3 q6 o7 L; L# S) V
% P$ J. K9 j7 ?" r/ h' t .default_trigger = "default-on",
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},
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$ W% C! e9 x" _: Q( n$ ~+ d- ^" n .active_low = 0,
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2 B) I( Y/ ]6 v$ a. W$ Y .gpio = DA850_USER_LED4,
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.name = "user_led4",
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6 j( D& f2 r9 F8 Q0 U- ~ .default_trigger = "default-on"," k3 g( n8 V! e, u
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r K- J2 |, a .active_low = 0,& }! Z( K# O' D
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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 = {0 J/ M4 z$ k3 K) q0 H- K/ M. H
6 d7 n, u& m; e# x$ V .leds = da850_evm_tl_leds,
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.num_leds = ARRAY_SIZE(da850_evm_tl_leds),4 h0 }! S. r4 ^& p8 y/ K, X
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static void led_dev_release(struct device *dev)5 n, a+ L! R) H/ o, \" ]7 h
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};
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, i4 a) H* T. ]' |static struct platform_device da850_evm_tl_leds_device = {
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.name = "leds-gpio",$ p$ i8 @+ A) h6 X
) }) T3 g$ ~8 H9 D .id = 1,
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.dev = {: Q8 n( n( j/ W" x
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.platform_data = &da850_evm_tl_leds_pdata,
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.release = led_dev_release,
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static int __init led_platform_init(void)
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int ret;8 t0 Q: D1 S" |) v0 N
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) T3 f @* y0 N+ C& ` ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
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1 D9 G/ L( Q9 z" T if (ret)
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pr_warning("da850_evm_tl_leds_init : User LED mux failed :"4 i$ F$ a5 a. y- A! ]# H
' e+ i8 M5 ?' M+ q5 x" E3 B* ? "%d\n", ret);) M! ~; W0 E9 R6 F* C/ w
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ret = platform_device_register(&da850_evm_tl_leds_device);
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$ ]1 p& h7 _1 U0 A! B pr_warning("Could not register som GPIO expander LEDS");
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+ V. C" u. ~* a9 h) N8 C) d printk(KERN_INFO "LED register sucessful!\n");6 m9 Z1 d/ L+ i$ [: ?& R
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3 W7 m o; T* c; m; r return ret;' {3 t; z5 l* g- Z3 L( _
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static void __exit led_platform_exit(void), X# o+ r4 e" u: w! i2 W" I
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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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( h+ J! b4 W" Y2 m* zmodule_init(led_platform_init);' N, u. b) P5 B0 V0 A' |
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module_exit(led_platform_exit);, _" ^# `4 Y/ V. W2 G) M5 [& Q
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1 y% w% s4 ?/ ]8 C! D: p: MMODULE_DESCRIPTION("Led platform driver");
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& f! E* M9 ?+ b4 N% MMODULE_AUTHOR("Tronlong");- L7 c5 m, d$ p h5 P/ M
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MODULE_LICENSE("GPL"); |
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