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板凳

楼主 |
发表于 2018-12-14 17:29:27
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只看该作者
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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:
) h$ o; x) m; h4 K7 x9 l4 ^2 J3 \#include <linux/module.h>
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#include <linux/kernel.h>8 M2 W# h6 h/ N; \
/ r% h% x* y2 g4 I, T5 [#include <linux/types.h>" f; i6 A- X$ F9 u; a; x; T" P
% T/ N. E% B4 j/ V7 r#include <linux/gpio.h>2 P0 j9 A# B. n4 z. A
% M- S) _/ m: D/ u#include <linux/leds.h>
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#include <linux/platform_device.h>3 x' p9 p J# x# N5 s
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1 W+ U) _' v/ D0 P4 U4 ^; v4 H#include <asm/mach-types.h>/ Q( g7 r Q# e
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#include <asm/mach/arch.h>/ B4 U( x1 b, r. v3 |* [
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#include <mach/da8xx.h>* s& ?4 |2 F( k8 S1 P! U
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#include <mach/mux.h>
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#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)
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5 |' w7 Q" j$ j u. p# y3 X#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)9 w9 f+ Z9 z& T- Q: y
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#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)
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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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1 b$ ^- p* X% e#define DA850_USER_LED5 GPIO_TO_PIN(6,13)
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/* assign the tl som board LED-GPIOs*/
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8 P* _+ V1 i v% fstatic const short da850_evm_tl_user_led_pins[] = {$ \: j3 Z9 _ }3 T8 Y- v4 ~4 h
' r' _2 u5 n( y0 x2 L I3 } /* These pins are definition at <mach/mux.h> file */
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6 {9 X" p) F) V& q0 V DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,DA850_GPIO6_12,DA850_GPIO6_13,
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};
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static struct gpio_led da850_evm_tl_leds[] = {
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: c( H+ @( T1 k. ~+ n* A' w! f .active_low = 0,4 @5 M& z+ e! X) M
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.gpio = DA850_USER_LED0,
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.name = "user_led0",
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/ I, r5 D4 C C- ^4 ?. T3 g4 n1 T m .default_trigger = "default-on",
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$ q) S! {. l/ p! \0 `( O/ } .active_low = 0,
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.gpio = DA850_USER_LED1,8 ~+ v- o3 @3 D& F
; P) O# {6 b5 R+ X .name = "user_led1",
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7 r/ Q4 P W/ ~; l .default_trigger = "default-on",$ @" ~9 f$ U$ D1 v
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.active_low = 0,
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1 |1 r- z( @, P7 s$ [) F) O2 h. J+ `! e3 ~5 R .gpio = DA850_USER_LED2,, b$ r& A; H: j% ^! l# t U
! ? p4 @+ K3 N! t, T% p k* W .name = "user_led2",
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.default_trigger = "default-on",
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9 R7 v H* x% U4 G0 q8 ~% W* o, r) ^ .active_low = 0,
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4 i3 E) f/ d+ _% J .gpio = DA850_USER_LED3,& ` r$ t# S; w3 l: W* {% F8 w( o& S/ B9 d
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.name = "user_led3",
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6 |' J% p0 Y" o" ] .default_trigger = "default-on",
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4 X9 g3 q% y9 p .active_low = 0,! I r1 c+ |& t/ H+ E5 \" P
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.gpio = DA850_USER_LED4,
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( A# {# ?3 [& _* K7 a9 V .name = "user_led4",
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.default_trigger = "default-on",' ^. t1 j5 |# g+ N6 O( e; e
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},
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{
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! P) Z2 y. s. N& W! f$ D' A. u .active_low = 0,$ H8 @5 E: w# V( O
7 F+ v- z2 M9 G" g. I .gpio = DA850_USER_LED5,
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' S$ r: [2 D% D1 W. b% p, _7 h .name = "user_led5",
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.default_trigger = "default-on",
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};
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static struct gpio_led_platform_data da850_evm_tl_leds_pdata = {6 s$ z, y# x: G/ r8 x
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.leds = da850_evm_tl_leds,: u& V3 A' h. j6 x0 A ]6 l
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.num_leds = ARRAY_SIZE(da850_evm_tl_leds),
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};6 [* \. z& _: W* ^: F
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- Y. D" p" X0 G% A5 Sstatic void led_dev_release(struct device *dev)
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};
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static struct platform_device da850_evm_tl_leds_device = {1 B ]! H3 o; U
, |- ~. i b# | .name = "leds-gpio",
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.id = 1,
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.dev = {( v# r1 m( K. C8 A
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.platform_data = &da850_evm_tl_leds_pdata,
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.release = led_dev_release,
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static int __init led_platform_init(void)
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int ret;
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% Z9 V) Z2 I8 d0 b! k7 ? ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
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1 A* M; ?- x `! Z2 x! E if (ret)
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pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
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9 o0 m* w3 {: J* U "%d\n", ret);
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#endif) E* w p$ T( h! Q8 h/ s2 Q
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ret = platform_device_register(&da850_evm_tl_leds_device);" |- H. T6 V! [# `8 P7 b. C
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( {' G% Z" ?4 _, ~& U& ]: Y- J" K pr_warning("Could not register som GPIO expander LEDS");' W; G: G' }4 G8 t- Q& Y
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else
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6 O" ] X- X) O) Q printk(KERN_INFO "LED register sucessful!\n");9 m* O; H! a- ^' t
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return ret;
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static void __exit led_platform_exit(void)
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platform_device_unregister(&da850_evm_tl_leds_device);! _% ~) n$ I- N9 ?1 o8 @9 u
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printk(KERN_INFO "LED unregister!\n"); v$ I6 v/ S% A! m+ {
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) l8 @& E9 _& Q3 [# `8 `3 l6 y6 xmodule_init(led_platform_init);
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module_exit(led_platform_exit);7 F* V! r7 S; c& {# c/ F0 R" x0 p
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. _4 {' q) ?8 f9 ]- \2 C* [MODULE_DESCRIPTION("Led platform driver");
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2 r/ s5 [4 u" ^' m1 _9 M) DMODULE_AUTHOR("Tronlong");, H6 L+ c% L1 R7 W E$ v& }( Z3 P) u" b
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MODULE_LICENSE("GPL"); |
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