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板凳
楼主 |
发表于 2018-12-14 17:29:27
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+ w1 _+ l( m- O, s# M% O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:! f0 V% M5 J9 ]/ a
#include <linux/module.h>, W" H) w$ f$ K8 K2 ~( i2 ]& B
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#include <linux/kernel.h>
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#include <linux/types.h>- `/ \ X5 J2 x" a! T4 W
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#include <linux/gpio.h>
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#include <linux/leds.h>
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' ~. J/ `) \( R& g$ B0 E: {#include <linux/platform_device.h>2 J0 R/ s8 Q$ H' ~% J9 U4 s8 X
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#include <asm/mach-types.h> b+ r; z2 r$ I" L$ m
7 Y: R8 h/ O. Z8 [9 m#include <asm/mach/arch.h>" N( D( l0 X! d
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#include <mach/da8xx.h>
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#include <mach/mux.h>
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5 E5 G! [' L( p( I* o! @#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)
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% z* p! U4 y3 o" A) e5 G#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)) K+ T$ d ~1 `. r- }: C1 e
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#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)6 f6 I; |" `; f' `
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#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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#define DA850_USER_LED5 GPIO_TO_PIN(6,13)' A' c8 E& p0 l- x: O* w
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" N* ^9 I( ?5 K7 g) O& u K2 ]/* assign the tl som board LED-GPIOs*/
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static const short da850_evm_tl_user_led_pins[] = {
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/* These pins are definition at <mach/mux.h> file */) `2 P4 T& l* I9 T: p
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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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static struct gpio_led da850_evm_tl_leds[] = {* l/ J) T7 `+ \0 t
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{
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1 }' F/ d& s1 x! c3 y- r+ q .active_low = 0,8 R+ e5 w1 e1 K; H1 Y, P- k
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.gpio = DA850_USER_LED0,1 {9 y5 q2 ?9 I6 ?
: K' B; O7 o4 F# n1 ^ .name = "user_led0",0 s8 @$ P9 V+ @- W
9 ~6 E1 E3 a# u9 B+ D0 w6 ?8 b .default_trigger = "default-on",8 S3 |+ w% Y# c4 r6 y R
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1 d9 z! {# X6 C+ G .active_low = 0,; ~/ c0 O: I: Q
& c$ U* L4 w0 I* h8 l .gpio = DA850_USER_LED1,
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.name = "user_led1",
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5 i3 m' J6 x3 w2 O$ t4 F .default_trigger = "default-on",
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.active_low = 0,
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.gpio = DA850_USER_LED2,9 Y( U1 Z0 s: w9 M+ a. ?( `
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.name = "user_led2",
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& _ |- ^% T* O+ ^ .default_trigger = "default-on",/ g2 ]1 r0 {$ P) J! Z/ S$ n: p+ R
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{
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.active_low = 0,
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.gpio = DA850_USER_LED3,0 Y+ |. K0 W# p
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.name = "user_led3"," E1 e( C0 ?$ _2 v: G6 b
/ m3 |* R: e% U" o .default_trigger = "default-on",
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.active_low = 0,
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.gpio = DA850_USER_LED4,
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.name = "user_led4",
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.default_trigger = "default-on",2 o( X4 r W- M9 g& [; C+ f
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.gpio = DA850_USER_LED5,
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7 X* D3 _' ~/ g( ~ .name = "user_led5",4 B% W* z0 Q3 u5 f: y
( Q* C( ^* C* Y( ]0 a% C+ _ .default_trigger = "default-on",% G! T# }2 ]4 s+ L" e
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static struct gpio_led_platform_data da850_evm_tl_leds_pdata = {) e% M$ U( ?# G6 h' |3 @6 @& H( K
E7 _! v6 I2 X" x3 ]! [ .leds = da850_evm_tl_leds,
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* S* j2 V+ `4 \: D8 y R* g .num_leds = ARRAY_SIZE(da850_evm_tl_leds),6 d1 z, g. ]* \$ h% w
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- M3 y/ y# q$ nstatic void led_dev_release(struct device *dev)2 N( V7 z5 u7 Q, f$ q# |- W
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static struct platform_device da850_evm_tl_leds_device = {6 P; z% q* A2 w+ l5 R% B$ p9 B
/ p& s. J& ~9 w, Q$ z6 Q) | .name = "leds-gpio",
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.id = 1,2 u$ _" P% n; ^7 C! D5 _7 M8 ]2 t
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.dev = {
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* h B3 S( Z9 j- y .platform_data = &da850_evm_tl_leds_pdata,2 C. P1 i' ]( R. k2 t" S# U
' m/ i/ W2 V R- C4 T .release = led_dev_release,* ]$ ]* e2 H, d1 ]' F
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};
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static int __init led_platform_init(void)& w5 _2 Y& r$ s- p: z$ c5 M1 c
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# q! A, x" F( r' v& K int ret;' E* c0 F$ @5 N9 }
x1 i2 ~" ~2 y8 s3 T2 o* K#if 0
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5 L! y0 @4 P8 j% I ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);$ C$ ~, E, i/ |9 P
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pr_warning("da850_evm_tl_leds_init : User LED mux failed :"4 w3 }* c0 T& w' M0 G; _
, N; `; w3 B; ?3 d1 ~% C "%d\n", ret);
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) _; g) M5 E! P$ g5 H2 O#endif! l, U4 P* Q* M8 M; c
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ret = platform_device_register(&da850_evm_tl_leds_device);6 ?7 n+ ^8 M! a' x2 a9 ^
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if (ret)
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# u2 f/ B6 s: w: Q) I pr_warning("Could not register som GPIO expander LEDS");# l% Y1 m; L! [7 p9 k. d+ ]
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7 n! k* T" @: i( H0 X1 t) Y# m/ \ printk(KERN_INFO "LED register sucessful!\n");
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return ret;
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static void __exit led_platform_exit(void)8 H# K( n+ O3 [3 ^* V; G$ t: M3 i9 B
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platform_device_unregister(&da850_evm_tl_leds_device);
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2 Y2 b8 |! ^) S+ Q& W, b7 S printk(KERN_INFO "LED unregister!\n");
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module_init(led_platform_init);% t* _9 _2 g) w
! w+ c0 h# E/ A% Jmodule_exit(led_platform_exit);
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5 g( N9 ~7 F' a2 s* gMODULE_DESCRIPTION("Led platform driver");9 C8 H; F: o: x) x5 i
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MODULE_AUTHOR("Tronlong");
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0 Y! E7 M$ p/ o5 N8 J: _MODULE_LICENSE("GPL"); |
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