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板凳
楼主 |
发表于 2018-12-14 17:29:27
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$ v' U* a& ^8 _& ~. X8 ]9 ?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:
- b4 v- W7 R- Y( J- [( b' @7 W#include <linux/module.h>
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#include <linux/kernel.h>
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! }) r' t) k7 p: A# Q! ^#include <linux/types.h>
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#include <linux/gpio.h>7 L$ d/ E$ U2 ^9 ?) a0 F* S
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#include <linux/leds.h>( N' n; X1 q( X2 C5 q$ F) H
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#include <linux/platform_device.h>
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9 Z7 G7 |* z; M7 l4 J) l. h/ B& J#include <asm/mach-types.h>+ C2 g. K& e, h8 t. }
! z q! E b7 x# b+ n* x9 O#include <asm/mach/arch.h># R" G6 b$ ~ m; F7 l
2 `& k* E9 t- H1 d# E9 O. |#include <mach/da8xx.h># F1 c: H# U7 x* p0 u) J" h
# A5 w9 D1 A$ M, W#include <mach/mux.h>
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1 S5 h: {* T) N: \; d. H/ {2 {#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)
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# q6 ]; _* K3 g. w( m#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
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#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)7 e7 M( e5 ^# n
/ W4 s* F& ^# H1 ]0 V/ E1 L6 {7 T#define DA850_USER_LED3 GPIO_TO_PIN(0, 2). ^% y3 \# y9 x4 r* F4 {- n
) j2 `* q3 g# g, e- G) F$ M#define DA850_USER_LED4 GPIO_TO_PIN(6,12)+ I) E7 E% K' V, m+ R* T0 Z, y
q8 r5 D6 V; z% X0 U L#define DA850_USER_LED5 GPIO_TO_PIN(6,13)9 g0 E( B9 P$ _ Z6 k
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4 a) |5 V7 j1 [& q$ e1 k9 P2 d: v/* assign the tl som board LED-GPIOs*/5 D z/ {- G# U
5 l0 h8 c3 f2 V1 F; S; _/ j$ C& Ostatic const short da850_evm_tl_user_led_pins[] = {7 X m9 m0 k! H& N; @
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/* These pins are definition at <mach/mux.h> file */
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. N& O6 W* m# M A4 e1 r) Q DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,DA850_GPIO6_12,DA850_GPIO6_13,
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-1
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& s" r4 ~+ d2 w1 A% estatic struct gpio_led da850_evm_tl_leds[] = {3 S- n. T7 F$ _* ]7 j. K0 D5 ?* ^" {
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{
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.active_low = 0,7 o$ r0 r, \9 Z% k/ ? p9 t
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.gpio = DA850_USER_LED0,
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- S5 S! S. ?( X0 y! Y0 Y .name = "user_led0",
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" M* e0 L) M9 S1 H& E+ U3 d .default_trigger = "default-on",
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},
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.active_low = 0,0 A' `" w" J' G# c" g
# `9 g, B( Q- y! k& R5 \ .gpio = DA850_USER_LED1,
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! }, B+ a! L- F" a .name = "user_led1",2 V' F; Z, p# v$ Y
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.default_trigger = "default-on",. [3 v& R* t( n/ c2 x4 x# }- `6 z
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},
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.active_low = 0,) \' Z1 E$ _4 w$ Q% a7 v) J1 r
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.gpio = DA850_USER_LED2,
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.name = "user_led2",! y5 `. Y/ y: T7 i0 U7 z: t
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.default_trigger = "default-on",
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},
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{
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& M9 X0 v/ e' O1 l7 V& B .active_low = 0," a& } Z* Q9 R, p
; E# a7 k2 ^1 c) i$ x# Z( q0 Z .gpio = DA850_USER_LED3,) Z. z! u# H" a" P9 ]
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.name = "user_led3",
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+ ^& b% ?; V, I3 Q3 [6 O .default_trigger = "default-on",% e# C; w# z8 t
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$ K% g1 v: w; X) q .active_low = 0,
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.gpio = DA850_USER_LED4,
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+ W N R; p8 D* H& Y0 g .name = "user_led4",
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% }: `7 t Y& r* ]/ ^ .default_trigger = "default-on",
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.active_low = 0,
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* N% D" k2 m2 _. L; {/ ^" L- v2 K .gpio = DA850_USER_LED5,
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.name = "user_led5",
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.default_trigger = "default-on",
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( J8 `$ z, p: W" I};
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static struct gpio_led_platform_data da850_evm_tl_leds_pdata = { i" |1 ~- r! f/ R d6 @2 K
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.leds = da850_evm_tl_leds,
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.num_leds = ARRAY_SIZE(da850_evm_tl_leds),
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};$ m9 f9 {. ?! A$ C
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7 ~2 |6 k2 ]9 D! g5 }* p. ?static void led_dev_release(struct device *dev)2 v) b$ _4 X0 T6 N% q- C
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7 B0 U6 \8 F/ ?( k( ~& }* Qstatic struct platform_device da850_evm_tl_leds_device = {/ ~/ x# B0 i- O- } p
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.name = "leds-gpio",* r6 b7 ], w" l* h* v
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.id = 1,
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% l4 k( e5 z* `3 b9 Y* o .dev = {
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.platform_data = &da850_evm_tl_leds_pdata,, r% x% Y+ f& m f. N
" ?! Q- J9 Q; I0 ^) |' t1 ]/ _5 g .release = led_dev_release,# Q1 ^! ?0 Q( @& ~% a7 Q# B
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};
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static int __init led_platform_init(void)* ^* N7 {1 t7 N- J1 I
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int ret;; m2 |$ j a& H' t, P' u
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ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);0 A8 L1 g( w0 U; K( |, t
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if (ret)
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. V8 ^6 I7 q5 f& u3 s pr_warning("da850_evm_tl_leds_init : User LED mux failed :" [9 o' U8 ]% N2 I1 T" a* O
# l. n: M2 A: k "%d\n", ret);
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# d) q# g) z9 I) Z: A% K7 A. } ret = platform_device_register(&da850_evm_tl_leds_device);+ R0 A5 P" F2 D( g; y. Z, _
4 G! _4 P2 g7 |* O; z% G if (ret)
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pr_warning("Could not register som GPIO expander LEDS");
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8 u' k: {+ }) @; k3 f3 ^) l! ] printk(KERN_INFO "LED register sucessful!\n");
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7 [& K4 }; P( `7 @2 \+ ?' J return ret;
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6 p1 F* q: g0 n, r# H+ q5 N, istatic void __exit led_platform_exit(void)/ V" ^- R3 e" A. ]
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# ~# u. V5 Z6 {) o platform_device_unregister(&da850_evm_tl_leds_device);. t/ Y2 e3 k/ W7 K* v; r: Q
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printk(KERN_INFO "LED unregister!\n");
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* W4 x7 {# M( a) ~; W& e1 Pmodule_init(led_platform_init);9 T' {# ?$ \& k
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module_exit(led_platform_exit);
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MODULE_DESCRIPTION("Led platform driver");4 h& o% F0 v0 l! x9 K- ^! P
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MODULE_AUTHOR("Tronlong");3 {; G7 [: L; [3 U3 @. Q% ^
) s7 ~) C' i+ Q5 pMODULE_LICENSE("GPL"); |
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