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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:
3 e! U9 B& A5 P' _& F0 z#include <linux/module.h>
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5 k8 d8 v) N- y0 H. f4 v#include <linux/kernel.h>; S# B; n( E" X1 K( i
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#include <linux/types.h>
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#include <linux/gpio.h>. J5 W! I* a, `, |
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#include <linux/leds.h>; p. E& w7 i6 M4 E2 ]
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#include <linux/platform_device.h>) [6 K" T( A, A- O
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#include <asm/mach-types.h>
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! M: q3 V. d! ?4 ?! d0 _#include <asm/mach/arch.h>/ c2 ^" C0 t( ?; {( D' S
6 ~/ D _: E' t- F( Y#include <mach/da8xx.h>
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9 O! c' `* t9 r* f1 @& Q( r, k$ V#include <mach/mux.h>
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#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)
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#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)4 P, W9 w: k9 L
1 R! l3 i- X% |& ]#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)- y, _3 @* o0 ~7 ?1 H4 F* A6 g
2 p' |* W* |9 w2 {. d- q9 Q0 S1 t6 o& `#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)
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' ~, z. f7 x+ S' E" D#define DA850_USER_LED4 GPIO_TO_PIN(6,12)
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. K" |8 l( Y% r/ L# h' u#define DA850_USER_LED5 GPIO_TO_PIN(6,13)1 J9 h; [3 X& A" O3 W
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/* assign the tl som board LED-GPIOs*/ o: v4 c- L2 f
; X" e" d( C$ W; Bstatic const short da850_evm_tl_user_led_pins[] = {- n6 X$ Q1 u* }) ^' w9 O
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/* These pins are definition at <mach/mux.h> file */
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$ u* a' r% B& N" q4 k7 x DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,DA850_GPIO6_12,DA850_GPIO6_13,1 u2 y: Z& ~+ A9 E8 `- Y. s, C& [
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static struct gpio_led da850_evm_tl_leds[] = {
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{
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8 j+ e+ n1 Z4 C" y .active_low = 0,
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.gpio = DA850_USER_LED0,3 \3 {* P# }5 }
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.name = "user_led0",8 E& A' Z9 Q# T( w4 z# f: x
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.default_trigger = "default-on",4 }% I+ C4 v" F! S; r1 |5 ]
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{
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.active_low = 0,
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.gpio = DA850_USER_LED1,7 x+ m* A; N$ f) o: J' W: K
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.name = "user_led1",3 G* a# y, k$ B$ e6 j8 L7 d% `5 k# a! c, ^
9 p/ L, D% Z! G; [: }* J .default_trigger = "default-on",
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( [, o. w/ K1 z2 T .active_low = 0,
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.gpio = DA850_USER_LED2,
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.name = "user_led2",, N7 u, o' Z) W+ A, n% v
0 [- {0 }6 ~2 E0 w; {5 k .default_trigger = "default-on",- j% s1 E9 G0 r9 @! B! P7 l6 |
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{
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$ f& N3 I3 O6 N .active_low = 0,
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.gpio = DA850_USER_LED3,
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$ U8 }# \; q+ x2 J) N# f, y .name = "user_led3",7 o6 h' Y/ N$ F8 [* z& `( U
$ I5 t/ \( ^, @7 w4 ~5 V .default_trigger = "default-on",$ [6 f; b+ e7 E. W4 v8 m; t
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},
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.active_low = 0,5 c! z4 L$ B$ n, Z D* u4 |
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" X; O4 n7 H1 `; G/ C# P .name = "user_led4",4 h! o3 u( A- p4 e8 x
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.default_trigger = "default-on",
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{
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.gpio = DA850_USER_LED5,
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! W0 Z3 S& i& p2 E2 P; n9 l .name = "user_led5",( ], ~1 {) Q, w7 d- F
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.default_trigger = "default-on",# X! ~; Z' V/ o. _; h9 K1 E# D
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},
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# |. Q+ Y1 ]( F% V1 x; |static struct gpio_led_platform_data da850_evm_tl_leds_pdata = {
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) y2 `& |9 l, E% m .leds = da850_evm_tl_leds,9 H" a" X5 ~9 T# A7 ~
. }1 T" e) q! A# U8 I .num_leds = ARRAY_SIZE(da850_evm_tl_leds),5 k& T) n) H5 {0 S1 K
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};" ]' t2 S7 w Q1 g) u4 {8 g
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6 o. {9 P$ q5 F( Qstatic void led_dev_release(struct device *dev)5 h. T: V; A2 R! ~& G: G
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static struct platform_device da850_evm_tl_leds_device = {& @5 u) v, W/ J' w% q. u
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.name = "leds-gpio",1 X5 q: h- O3 N6 E0 z6 \. w
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.id = 1,
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.dev = {
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; E8 ~& S/ h( d# w2 N .platform_data = &da850_evm_tl_leds_pdata,
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$ c1 d; L" }7 S .release = led_dev_release,, Q# r' Q" G$ b- Y" x9 r* G0 A
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};5 X! p9 u# B( R( p
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static int __init led_platform_init(void)
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{
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0 V3 b* M0 R1 f! G) ?* B M+ f; L int ret;- A0 }4 b% V- S. O7 d ]0 ?& j* M
/ g+ l: o4 E1 U2 T& P* c#if 0
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2 m* }, b2 w, S) e: [; N) E6 O2 @ ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);0 T/ L- ]1 d( c4 K2 i
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if (ret)
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9 {, i2 A& D4 ]/ q4 {* n( P9 M pr_warning("da850_evm_tl_leds_init : User LED mux failed :", J/ w6 l, l8 b
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"%d\n", ret);
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% ^6 B% o8 {" q6 B- G& W. ~; `#endif
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ret = platform_device_register(&da850_evm_tl_leds_device);8 ~" n8 I+ h- M! C
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if (ret)2 Y; {' A0 Z. R/ `8 C0 u2 \
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pr_warning("Could not register som GPIO expander LEDS");
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else) ^; W# Q' \8 ~2 d$ d2 ?6 H* D/ o
4 e# D5 p& K4 I' [ printk(KERN_INFO "LED register sucessful!\n");
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5 ~5 g- q# G" b return ret;
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4 K, {1 f9 o' Istatic void __exit led_platform_exit(void): X# U* I1 h: d _, v9 z
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: n* Y4 i& {( X7 | platform_device_unregister(&da850_evm_tl_leds_device);4 O) \* ^- }+ \ L# C
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printk(KERN_INFO "LED unregister!\n");4 n2 B' r$ F6 n. f; N
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module_init(led_platform_init);- O8 |/ P2 i9 q6 O: |' Q
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module_exit(led_platform_exit);, _; o: T a N# d; ^
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! p! D4 |: o1 i' AMODULE_DESCRIPTION("Led platform driver");$ r; V" X* w0 R7 V8 e
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MODULE_AUTHOR("Tronlong");/ Z' Q5 a2 b. P4 I( O5 G' K6 P
; f0 m9 c: l G& _% C* ^6 D; K7 ^MODULE_LICENSE("GPL"); |
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