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板凳

楼主 |
发表于 2018-12-14 17:29:27
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4 x: x" c& {9 l+ p, d+ D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:
5 V; n2 c* Z- ?5 P( H+ C6 `5 k: C#include <linux/module.h>1 H# [' e9 s$ g- O. L( p6 K
) W" J" u& F* i5 t#include <linux/kernel.h>$ Q0 i9 Q: ?3 u$ S' L/ _$ n
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#include <linux/types.h>) g' W$ ]1 J t
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#include <linux/gpio.h>8 X- f( V7 \2 V' j
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#include <linux/leds.h>
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#include <linux/platform_device.h>1 w% k, F) U$ l" }: L
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$ G% D4 m+ c) H2 E1 }1 g#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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4 F) g3 C' P; |! x2 P4 c7 e#include <mach/da8xx.h>
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2 V; ?" b4 J1 R0 j8 T$ s#include <mach/mux.h>
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#define DA850_USER_LED0 GPIO_TO_PIN(0, 0): @; l4 {" f; }' N1 d8 ?5 B
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#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
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- U W3 k8 I7 Q+ C#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)- T k0 k; U& i8 V. c6 z6 ^+ a
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#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)
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1 A( o; y. b4 _$ ?1 S#define DA850_USER_LED4 GPIO_TO_PIN(6,12)2 b! [# |, u# O* A
% \; t7 F# C$ P2 z#define DA850_USER_LED5 GPIO_TO_PIN(6,13)
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. |8 H' C6 q4 |+ x/* assign the tl som board LED-GPIOs*/" R4 c W1 }8 B% K) e# D7 b0 z$ V) |$ F
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static const short da850_evm_tl_user_led_pins[] = {
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* H5 P! C+ ~2 S5 P /* These pins are definition at <mach/mux.h> file */8 U& Q: P+ f& m* e4 s# E; i! s3 R, i
2 `2 G# j( d9 J( a8 l! \; W 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[] = {
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.active_low = 0,
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9 z: l* [2 U: t) q: r .gpio = DA850_USER_LED0,5 V# }3 j* I. \# C) ]. S
, s* t9 b& N9 M9 F7 K: o3 Y6 S .name = "user_led0",
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.default_trigger = "default-on",
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.active_low = 0,2 \3 g" E% ]' H+ E n
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.gpio = DA850_USER_LED1,
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4 \/ d) Z! `$ \9 M( [7 U4 [, h" ? .name = "user_led1"," y4 J7 k5 E' [' |: x
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.default_trigger = "default-on",
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k# ?$ e4 e4 i, G) r+ u .active_low = 0,/ l& ~6 }9 d/ n( r: I
0 t: R3 i6 X5 ?9 n .gpio = DA850_USER_LED2,
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. Q; g2 d0 X5 J8 Z5 b0 g .name = "user_led2",
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.default_trigger = "default-on",
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+ B4 b2 Z/ P$ g$ K5 {$ K .active_low = 0,
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.gpio = DA850_USER_LED3,
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.name = "user_led3"," u1 j. _3 O1 T
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.default_trigger = "default-on",
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{
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- [- a; C* p0 v1 a) o% [) k .active_low = 0,
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.gpio = DA850_USER_LED4,$ `5 R1 K6 |6 K
* y, v9 L F) `8 x, E .name = "user_led4",7 L6 d2 V" N# Y, t. v; ~, V. _. x
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.default_trigger = "default-on",
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8 ^. N( z6 f0 c7 C$ B# C .active_low = 0,; b& E% v2 r2 e f" }8 n; i
4 s5 S& ^1 J* W) {, M. G .gpio = DA850_USER_LED5,
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.name = "user_led5",
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.default_trigger = "default-on",5 p6 n+ B. ]# b d
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};$ ]3 E9 U; m ^- f0 Z
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! I2 r p$ }4 x9 Kstatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {
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0 n9 |, ~& b: J* E: s2 D .leds = da850_evm_tl_leds,
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# w2 L2 \- x, V0 t& \9 q N .num_leds = ARRAY_SIZE(da850_evm_tl_leds),
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8 d- B8 @2 l; H* Mstatic void led_dev_release(struct device *dev)% L* u) C0 W9 F6 A( l4 h: B
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! w E( r( x. n& X0 ^) Estatic struct platform_device da850_evm_tl_leds_device = {
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.name = "leds-gpio",
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9 x: p0 d5 [- K2 l7 N9 T .id = 1,5 {; B' ] p' e
( u3 [: I" k+ [2 X- X8 M: E .dev = {8 [) _: V0 j; j1 O* N
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.platform_data = &da850_evm_tl_leds_pdata,
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.release = led_dev_release,
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: j- H6 P, L1 f3 Wstatic int __init led_platform_init(void)
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{
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2 h4 s* S* t/ g) x int ret;
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! H0 M( s6 l' L" b2 ^. R! Z#if 0
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! B2 s& _! ]: S2 L4 m1 K ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
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if (ret)) {& y# ^8 K( q5 X
$ |4 D `7 ?6 _) u/ H* O! C0 d# d pr_warning("da850_evm_tl_leds_init : User LED mux failed :"' `$ l6 T: f/ V( K( X; _* ~! V" C
4 `" J9 [4 L6 o- f/ n i6 C% T% z "%d\n", ret);1 {8 ^& A' {1 M- d3 A* S" i3 q/ t
& A" `2 T& \; z: O$ Q#endif. z& d" ?. U- ?. ^3 g
) Q- B/ q% Z* u% R& B ret = platform_device_register(&da850_evm_tl_leds_device);
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if (ret)
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* F% T* @1 A+ _) H, h pr_warning("Could not register som GPIO expander LEDS");) {) V! m6 i0 D1 J! M- o
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printk(KERN_INFO "LED register sucessful!\n");
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# e8 P, ~" t* K. E return ret;
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static void __exit led_platform_exit(void)* a( h8 O" P y9 f" V
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platform_device_unregister(&da850_evm_tl_leds_device);
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printk(KERN_INFO "LED unregister!\n");
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module_init(led_platform_init);* q: [% @) Q4 @0 `$ L
- i1 r* @6 j( H& i# u! e4 Zmodule_exit(led_platform_exit);' z) X: o4 ^% r, {+ y. y
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MODULE_DESCRIPTION("Led platform driver");7 U) B; u3 z* O# V G* e
2 R$ D' U0 f I# TMODULE_AUTHOR("Tronlong");
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MODULE_LICENSE("GPL"); |
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