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发表于 2018-12-14 17:29:27
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; H+ m- }$ y& z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:. Q( ^3 C* \3 L3 Z
#include <linux/module.h>( T/ \1 m3 M0 w9 [
: }, n* F8 Y0 n, b' @6 a#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/gpio.h>
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?. Q& \' I. K5 `4 o, u) p1 K3 T#include <linux/leds.h>
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5 m5 S# F( K* P9 i1 ?$ q#include <linux/platform_device.h>) I6 `4 k7 D( b. ]1 m# y
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, r3 h3 C0 c+ T9 M$ v#include <asm/mach-types.h>; [+ z0 o2 ?8 A& X7 X( G5 D
' _5 m/ Q" k ^2 F @/ X3 y. q#include <asm/mach/arch.h>
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: P7 l9 g5 Z" f, J#include <mach/da8xx.h>
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#include <mach/mux.h>
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#define DA850_USER_LED0 GPIO_TO_PIN(0, 0): _5 M* m+ Z: o5 r
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#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)5 F8 ^& ~% W# x* t
C) V, K1 P& F4 D% T; a#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)0 I" d8 b5 F8 a0 y: H
$ [) H3 b7 Z- B+ ^( A6 F- i#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)# z4 Y6 n% k; b& n, V
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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)3 I4 d& t" e- {; K M
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5 U; N( y) W% V1 n5 y# Z/* assign the tl som board LED-GPIOs*/
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{3 f, ]! c) G. ~" _: ^static const short da850_evm_tl_user_led_pins[] = {& m+ O1 `& H* |2 g7 ^5 ~
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/* These pins are definition at <mach/mux.h> file */. B; G6 U& Y+ I2 {
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DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,DA850_GPIO6_12,DA850_GPIO6_13,2 r- b. o/ f+ G8 U5 s# s4 V
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static struct gpio_led da850_evm_tl_leds[] = {
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7 |; O! Y7 U* G$ }, |9 p% \1 W. f" _ .active_low = 0,: N0 i2 d' p/ T, G. r
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.gpio = DA850_USER_LED0,3 u3 k6 |: E a2 W9 J9 u
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.name = "user_led0",
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.default_trigger = "default-on",1 V3 R4 [0 o P5 @- F- c
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.active_low = 0,
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.gpio = DA850_USER_LED1,
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/ ]9 z# W! K# O/ \+ V .name = "user_led1",! L) |4 @9 E1 Z A: |
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.default_trigger = "default-on",; h6 T2 s1 o6 x2 W% @/ @! E( u
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.active_low = 0,
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.gpio = DA850_USER_LED2,. l/ Q0 i Z r+ P% F& h. S
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.name = "user_led2",
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# L8 s/ D4 [$ \7 `! [# w6 H4 Y .default_trigger = "default-on",
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{
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3 y' e/ i) X1 Q9 D) u/ x/ t .active_low = 0,
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$ o5 B; N/ R) M- ~/ b .gpio = DA850_USER_LED3,
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$ I% M: T" c, r" r- l# c9 u .name = "user_led3",9 ~& F8 ?8 v9 ~0 }: Q
" ~: w3 |, }! m/ r! N .default_trigger = "default-on",. b1 N5 x' S# M4 H8 O% F
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.active_low = 0,% c2 d4 O% o7 P! W! g
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.gpio = DA850_USER_LED4,
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.name = "user_led4",- G3 ?: T/ W7 J& [6 D/ T G. N
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.default_trigger = "default-on",
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0 n4 N0 h5 Q$ e, z) c9 r0 d$ R4 X9 x$ l .active_low = 0,
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.gpio = DA850_USER_LED5,/ j$ U, P3 k, ^) t* U; z
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.name = "user_led5",! N& m ^8 P; [4 @2 i. L
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},
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static struct gpio_led_platform_data da850_evm_tl_leds_pdata = {* {6 E: n5 D( ]6 p
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.leds = da850_evm_tl_leds,
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( ]4 Q# j& N. j9 x- @ .num_leds = ARRAY_SIZE(da850_evm_tl_leds),
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0 s* R, {; |% m; d9 i' K};
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static void led_dev_release(struct device *dev)1 C1 Q* u" m, J0 d
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. ]- x n' a7 C2 xstatic struct platform_device da850_evm_tl_leds_device = {4 ~. E( K! `8 O
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.name = "leds-gpio",
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.id = 1,
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# t8 a* H& L, ~" _: P# O .dev = {7 M* S/ V* \+ [& Y5 P# v
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.platform_data = &da850_evm_tl_leds_pdata,( {$ V+ g1 ^* x; h$ a$ N* c
; l8 S3 Q; j( m6 E$ m/ ?' o .release = led_dev_release,# Z, a5 _* w& a+ i. z6 |8 E2 r
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}
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};
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. o/ U6 n$ ?% D3 jstatic int __init led_platform_init(void)
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6 }8 w( S% @1 d% d% T int ret;
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#if 0, v3 O3 t; I) S1 U
" {8 D# u8 O6 u7 K/ [- I$ [- e ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);4 a% i5 \3 n1 L
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pr_warning("da850_evm_tl_leds_init : User LED mux failed :"8 `# e9 r5 V$ U/ T& K
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"%d\n", ret);
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#endif
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ret = platform_device_register(&da850_evm_tl_leds_device);
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. U: B& A2 K6 W if (ret)
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8 g( G/ ~! \8 V8 k; r A0 K7 P pr_warning("Could not register som GPIO expander LEDS");
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else
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0 c( [" I5 h0 J0 F; |6 U8 L, [ printk(KERN_INFO "LED register sucessful!\n");
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return ret;
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}
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static void __exit led_platform_exit(void); ?7 V2 d0 T; ~+ |4 N& `
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% m& h/ e; F/ E& Z+ C1 m platform_device_unregister(&da850_evm_tl_leds_device);
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1 J8 W$ ~9 A- O' y# P printk(KERN_INFO "LED unregister!\n");8 y3 U) e2 V! ^' d4 x
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module_init(led_platform_init);
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module_exit(led_platform_exit);7 d6 x+ c N5 z
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4 U; b0 B7 X) k4 i5 D& nMODULE_DESCRIPTION("Led platform driver");; u9 M" u* d4 x" v
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MODULE_AUTHOR("Tronlong");
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1 \9 t. B5 S7 Z7 DMODULE_LICENSE("GPL"); |
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