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8 \$ I$ G; l* s' m0 O* x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：$ u$ o9 `- s; ^( X
#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/gpio.h>
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#include <linux/leds.h>3 r4 @3 ?# } V" N) i
& N, S+ w9 [- a: S2 Z7 o#include <linux/platform_device.h>
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* u m: ]! B# |, y#include <asm/mach-types.h>8 Q: `$ t0 F% O8 V0 |6 V
0 l% x$ t. L5 L+ K#include <asm/mach/arch.h>
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7 h* h$ ?' C3 m6 U#include <mach/da8xx.h>
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9 U( h8 E9 O: s1 P1 X#include <mach/mux.h>0 u, n/ M2 l; s5 ^3 L8 e
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#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)
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! D, V7 D# }& E- P( x$ t#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
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1 _: T; e& ~* l( Y5 a5 N+ [#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)
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#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)- ?, q0 v& V. @9 x3 r
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#define DA850_USER_LED4 GPIO_TO_PIN(6,12). F# I1 [: n, q- z( v! R a
3 u# q! i6 U$ [- h1 R+ M f" }# Q8 k#define DA850_USER_LED5 GPIO_TO_PIN(6,13)6 H9 g; O9 t. K% |8 @% U0 ]; P
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/ h9 x* p2 e# Q/* assign the tl som board LED-GPIOs*/
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$ S' ~0 R' F- D$ k- C3 `, e* N. Sstatic const short da850_evm_tl_user_led_pins[] = {3 d8 a1 k6 I8 t! M8 W( [% ~
0 N1 y" O- w6 q: }1 w /* These pins are definition at <mach/mux.h> file */& @3 g& W5 U* V7 k
$ p/ \& C/ B2 c: g, p: O8 L DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,DA850_GPIO6_12,DA850_GPIO6_13,: `/ v2 s% E( K' B' G1 k
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static struct gpio_led da850_evm_tl_leds[] = {
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{
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2 R0 C T% N8 @4 [% n s2 b# K .active_low = 0,
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.gpio = DA850_USER_LED0,
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+ r( ~7 o8 J& b: E P .name = "user_led0",
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/ y$ m4 r" F& J, @+ ^ .default_trigger = "default-on",! R1 {3 e% D, L* J' B! w
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},
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.active_low = 0,# F. N4 |8 S) I
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.gpio = DA850_USER_LED1," B! c7 `0 b0 Y
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.name = "user_led1",
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.default_trigger = "default-on",
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},
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.active_low = 0,3 W- |$ i5 y' O1 G. b, a. m
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.gpio = DA850_USER_LED2,( _8 S1 U; d$ H
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.name = "user_led2",
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7 M/ s% K/ j0 T6 M# S& C .default_trigger = "default-on",/ f$ {6 J% X, {/ | c9 w
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( C2 k( Q# O" t- i4 D .active_low = 0,' ?: K! Q' m( C& Z
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.gpio = DA850_USER_LED3,
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.name = "user_led3",: G/ p! x9 F6 B0 Y
" k( ?9 x' U! W1 o0 O: P- p .default_trigger = "default-on",
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l( D; z8 h& Q" N4 n {
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* H; n! H. u- x .active_low = 0,$ i6 ~4 w- Q R8 s
. Q! |% [: q9 W9 y, c1 y& |+ g .gpio = DA850_USER_LED4,# ?! e5 ^7 `+ _+ Y7 ?
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.name = "user_led4",
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.default_trigger = "default-on",5 o: n- e( U1 }
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},
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.active_low = 0,+ i+ v/ e4 ~3 h5 M1 j0 s
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.gpio = DA850_USER_LED5,
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.name = "user_led5",
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& m) H2 m( f( _" ] .default_trigger = "default-on",+ a h6 f6 u( Z- R
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! K$ X7 w, c' z6 z+ @};
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static struct gpio_led_platform_data da850_evm_tl_leds_pdata = { p k( S ~4 I, C5 h0 O7 o$ D
4 l( g# F) z* d .leds = da850_evm_tl_leds,
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" I5 f! H# O& w) b .num_leds = ARRAY_SIZE(da850_evm_tl_leds),' z2 m; d) }! { o) X
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};
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- }+ c" P. A3 [% a" [$ j, [static void led_dev_release(struct device *dev)
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};
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static struct platform_device da850_evm_tl_leds_device = {9 g# H1 q {5 e) H- u
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.name = "leds-gpio",' U# I) q3 b. w& E, p! l
+ M! H2 [* y4 ~; `8 W7 T$ a8 n .id = 1,
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( O1 z7 b$ u5 C/ t t5 ]# \5 n .dev = {7 L3 z# T: K) Q' {% Q
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.platform_data = &da850_evm_tl_leds_pdata,- X" D6 j" Y) i/ B5 v# f. f ^
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.release = led_dev_release,
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};" ~# k+ N" o2 q1 m/ T! o
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static int __init led_platform_init(void)8 G5 I! X5 l, w: P2 o0 r
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int ret;
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#if 0
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ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);5 P' q; p$ A, J- J$ W' W' k
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if (ret)
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- r& H5 ^5 ?* R% r! B( } pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
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"%d\n", ret);
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#endif
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j1 h I! f& Z" K ret = platform_device_register(&da850_evm_tl_leds_device);2 K9 ^% g* A) N4 [+ l9 w
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if (ret)# _2 j4 m, A( s$ x3 j
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pr_warning("Could not register som GPIO expander LEDS");
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printk(KERN_INFO "LED register sucessful!\n");* y) q X, f, Q) v2 o! n
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& e, t' H8 u! e: e* Z% r$ ~ return ret;
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}
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static void __exit led_platform_exit(void)1 v) v0 G# W, r/ o' C
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platform_device_unregister(&da850_evm_tl_leds_device);' ]2 V: ]7 W8 ~! {" z. `5 {
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) p3 z# ]( t, H) g1 ]* U* L5 d printk(KERN_INFO "LED unregister!\n");
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module_init(led_platform_init);$ R' A* n8 ?5 a% V3 R! v
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module_exit(led_platform_exit);3 D4 W7 B8 }( l# O5 z
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MODULE_DESCRIPTION("Led platform driver");# C/ w E, m: c5 A
& m! p+ S3 T; _: P. v# o9 K1 S7 MMODULE_AUTHOR("Tronlong");
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MODULE_LICENSE("GPL"); |
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|手机版|小黑屋|嵌入式开发者社区
( 粤ICP备15055271号 ) 
发表于 2018-12-14 09:13:56
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