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板凳
楼主 |
发表于 2018-12-14 17:29:27
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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:
# W" w/ ], u/ I F1 `( x#include <linux/module.h>
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0 N- M0 _; x$ H; v9 ?#include <linux/kernel.h>1 }: n' H' K9 Q0 c
7 ^0 l0 \" H% P' A C#include <linux/types.h>
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#include <linux/gpio.h>
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#include <linux/leds.h>6 v9 U# {% {$ e% r3 j% E" D' ?
( w* o" G/ h" K#include <linux/platform_device.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>6 z. S7 ~# |1 i! R2 {
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#include <mach/da8xx.h>
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0 J i& E0 C( J% s4 T+ r#include <mach/mux.h>! r; _" ~' s4 i. E8 R1 p0 f5 M
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1 G) X5 e3 s) ~0 H3 l, c#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)
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% x7 V9 R: l; r) `. @- d: x#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
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6 v! j/ s7 S8 {/ l#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)
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a6 O1 _3 }: S6 b#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)+ _0 {; Q% Y! Z- c: _, m9 b
8 j& R' N* v8 L0 R, X#define DA850_USER_LED4 GPIO_TO_PIN(6,12)' b4 K! }2 i5 w) c6 y5 |- m
7 Q0 F* i2 t ?) k7 j#define DA850_USER_LED5 GPIO_TO_PIN(6,13)
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/* assign the tl som board LED-GPIOs*/
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) w3 |8 m% H' N. S8 S' g: Rstatic const short da850_evm_tl_user_led_pins[] = {
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# j; b3 G# I. A( K& @ /* These pins are definition at <mach/mux.h> file */8 d2 B! ]: s) h% N
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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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6 N G! D( c; ^$ E6 I1 Z) _static struct gpio_led da850_evm_tl_leds[] = {: t0 W5 h) B- k! k: p$ Y6 s( a* ^
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g2 V" {( f; a .active_low = 0,+ W: B/ [: ~0 y$ I. F/ j
+ K7 E0 g9 v! U, o# l5 t .gpio = DA850_USER_LED0,
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$ ~0 F- @( S* J/ V$ `2 Z .name = "user_led0",5 |3 y$ x' ]" ]+ |4 ?
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.default_trigger = "default-on",4 a# G4 A: X: s$ e b
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{
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.active_low = 0," s. ~0 d, N! z
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.gpio = DA850_USER_LED1,: p( t" m/ m3 A+ A
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.name = "user_led1",
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8 |$ \! u" t7 | D9 I6 {- `1 w .default_trigger = "default-on",
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.active_low = 0,* D; T9 ~& [4 J: {/ k5 s1 Z
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.gpio = DA850_USER_LED2,
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.name = "user_led2",
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.default_trigger = "default-on",
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},
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.active_low = 0,
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& t( u8 C* C7 P; I1 i9 q; k. L. s+ p .gpio = DA850_USER_LED3,
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0 X+ ~. t7 l5 E0 \2 k; [ .name = "user_led3",' {0 d1 S$ _% [$ b
. B" @2 k4 B( h, Z# C( ? .default_trigger = "default-on",
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" i; I% |# e) n9 r& ^ .active_low = 0,
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; d( h, h% M3 ]6 C9 O/ ` u: G# e a% K .gpio = DA850_USER_LED4,
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8 F5 V" [8 a# v! m. ?: o) [5 |7 a .name = "user_led4",; T- V3 t9 E: u: j
, L7 [3 ^; W* w& d1 U3 I .default_trigger = "default-on",3 N3 w( W6 j. c" }8 k" ~
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.active_low = 0,
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.gpio = DA850_USER_LED5,
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5 g) I9 k, H) t9 _ .name = "user_led5",
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: g" J) J8 j6 s0 E6 ~4 C+ j4 ~$ o1 I; x7 ? .default_trigger = "default-on",
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static struct gpio_led_platform_data da850_evm_tl_leds_pdata = {% O) o- K9 z: A! ^/ ~( X% V
6 E [+ q0 @. V# ^ .leds = da850_evm_tl_leds," Z! ]9 q/ @$ ]$ F' g
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.num_leds = ARRAY_SIZE(da850_evm_tl_leds),
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2 T* H0 U3 m% L% E( rstatic void led_dev_release(struct device *dev)4 m6 V! ?, _7 s4 q1 E& \ R0 O
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4 i# m P+ _% Z* h& ^/ W bstatic struct platform_device da850_evm_tl_leds_device = {4 r! V6 q1 I) {! N% \# H
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.name = "leds-gpio",9 F5 ?5 w: V+ M+ ~
: P$ \4 d. m: b; A4 l .id = 1,
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/ o! X, ^9 }; G& N .dev = {
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.platform_data = &da850_evm_tl_leds_pdata,
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.release = led_dev_release,+ ?2 T6 o' o2 y- n
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};
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! k6 F$ k! ]' x+ Y: gstatic int __init led_platform_init(void)& T9 }- q* d' B6 i
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{
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int ret;" {: A, h( p. Y0 h
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$ r6 F9 Y$ A, a5 W2 D ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);& G* [/ h+ G8 J+ [1 F* w8 `
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pr_warning("da850_evm_tl_leds_init : User LED mux failed :"- s" L. M+ B1 b
' y! A2 I. p1 C% {# }0 e6 ]4 o "%d\n", ret);. `8 Z% z5 D2 d' C1 O% }% E: _
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ret = platform_device_register(&da850_evm_tl_leds_device);
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if (ret)6 i5 ^4 A" l: [$ i g
4 [ X$ f; U3 N6 k- o" ? pr_warning("Could not register som GPIO expander LEDS");$ o5 v m6 Y H+ j4 C% k8 I
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printk(KERN_INFO "LED register sucessful!\n");
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return ret;* P# t) K6 z0 g& k6 a, y
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' q' t# v5 ?! C5 Q- w; Estatic void __exit led_platform_exit(void)6 Y( A, _' ^. D* k
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{
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platform_device_unregister(&da850_evm_tl_leds_device);. H; [4 b! _' Z i! T r( g2 V
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printk(KERN_INFO "LED unregister!\n");
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3 o& R! [6 _" F$ z- ~module_init(led_platform_init);
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module_exit(led_platform_exit);
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3 e6 A+ `0 a2 S+ ~8 qMODULE_DESCRIPTION("Led platform driver");
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) I1 e, P5 O7 l/ e. JMODULE_AUTHOR("Tronlong");; s' R- ^. ~: G& U# Q
3 S- B/ \& A, w9 OMODULE_LICENSE("GPL"); |
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