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板凳
楼主 |
发表于 2018-12-14 17:29:27
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: M/ G0 o; F+ ^7 F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:/ E$ t3 Q) q2 W! H: R* ?
#include <linux/module.h>/ m2 q8 H8 o9 F' W7 k& f9 y }% J
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#include <linux/kernel.h>
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#include <linux/types.h>, ^, b- E: _ a. T7 w& V% O
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#include <linux/gpio.h>( ?/ R/ ~, n* [ F7 ?2 D
: H l' {: q' e% h#include <linux/leds.h>! E9 v1 x, T0 t4 |7 A$ } k0 {
8 H2 y3 N/ y/ A9 W8 s1 s, U#include <linux/platform_device.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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- A6 S+ ^9 O% h2 }#include <mach/da8xx.h>, ] ~- x' d4 ?4 @& Q, j
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#include <mach/mux.h>
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2 k5 {4 H; E t- k. B, W. P#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)+ d0 g0 I/ k/ W: r' Y& X/ b
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#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)# P# l8 P0 I; L. R
6 _( ]1 J& A0 E. b#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)& A& k; Y9 v2 i, z" ]
% v# O( X5 D l0 m* q#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)8 p% y) W R7 v9 Q4 ?
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#define DA850_USER_LED4 GPIO_TO_PIN(6,12)" T) ^ D# \+ j9 {9 L- J
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#define DA850_USER_LED5 GPIO_TO_PIN(6,13)
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5 Z2 k: y9 ^0 z$ D) I/* assign the tl som board LED-GPIOs*/* c' m) F' G7 T5 m6 z( W
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static const short da850_evm_tl_user_led_pins[] = {- z" U' I' F3 A' U- _( P
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/* These pins are definition at <mach/mux.h> file */
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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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static struct gpio_led da850_evm_tl_leds[] = {
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.active_low = 0,: k$ P' d8 l; B {9 M
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.gpio = DA850_USER_LED0,4 _. V* x& y U- L2 d
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.name = "user_led0",- l9 k6 n1 f- }1 F: U6 M
, w) }, _: {0 L4 f2 ] .default_trigger = "default-on",
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},
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.active_low = 0,; e0 M1 q, t/ A. ]3 u
) N3 b C5 a8 x# g) w) P& ~2 T .gpio = DA850_USER_LED1,
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.name = "user_led1",
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3 Q$ C, M- Z! W, X, d% j .default_trigger = "default-on",) m* y) ]: k( D+ s- _
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},
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.active_low = 0,
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.gpio = DA850_USER_LED2,
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.name = "user_led2",) o, _8 O S; R
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.default_trigger = "default-on",2 H& `) K# `% G
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{
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.active_low = 0,
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.gpio = DA850_USER_LED3,
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2 O* e3 F% ]! \+ I& T1 M .name = "user_led3",6 L0 O0 m* k' ]5 A
' ~+ X9 N1 d# u7 n4 c' B8 O .default_trigger = "default-on",+ m5 `* G% }. O
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.active_low = 0,
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.gpio = DA850_USER_LED4,+ r* T! M" h1 m; S9 Y
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.name = "user_led4",8 i: j# ~2 `, N, c; e
# Y) `7 O! f4 t .default_trigger = "default-on",
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.active_low = 0,& p" m2 Y2 O7 N+ q* q; h
0 O6 M* M6 Q, { ?4 J .gpio = DA850_USER_LED5,, ~9 k5 r4 e+ I2 i
5 ]# d5 k: T; O5 X .name = "user_led5",6 }8 A7 B# w( G$ T' B6 A! i
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.default_trigger = "default-on",
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% ^# I& F3 M9 p( f# o" x6 d+ jstatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {6 `# b, _' u# p
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.leds = da850_evm_tl_leds,
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( X' F+ Y- v/ E9 \7 {1 K .num_leds = ARRAY_SIZE(da850_evm_tl_leds),
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};
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static void led_dev_release(struct device *dev)
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static struct platform_device da850_evm_tl_leds_device = {( D( i) T W8 o
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.name = "leds-gpio",
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.id = 1,( e: ]% x- j* v' v: [4 o' e
/ s! d6 y" Z+ n. F .dev = {
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7 _3 |3 p' D" T* A+ Z7 m .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;: D; g A# O* `! m7 \0 b N% P: [
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ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
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9 a! s. g. K' {1 z9 @ if (ret)
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, Q8 u4 B. G8 s8 q* m" G! A1 A pr_warning("da850_evm_tl_leds_init : User LED mux failed :") n6 V# C# Y) M0 Z
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"%d\n", ret);/ {2 x8 P0 k+ k/ G" _5 q4 P, B" h. S
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ret = platform_device_register(&da850_evm_tl_leds_device);. ^ I0 v! K0 @7 v
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2 h1 |$ G: R) _: \ pr_warning("Could not register som GPIO expander LEDS");
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# O% S3 e6 |, { else
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printk(KERN_INFO "LED register sucessful!\n");
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return ret;
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! g6 g9 z- b5 M9 F$ b" Z& xstatic void __exit led_platform_exit(void)% o0 o4 ?+ a( I# |9 l" A% O" Q3 y
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{
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; Y) I# i- a8 x5 e5 t; S9 |( D platform_device_unregister(&da850_evm_tl_leds_device);& S# N' u {' J
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printk(KERN_INFO "LED unregister!\n");
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module_init(led_platform_init); ^' z7 r# e0 M. c+ k, y( V" a3 ^! O
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! V' ^7 T3 l) c1 D ]6 EMODULE_DESCRIPTION("Led platform driver");
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6 m+ X6 k0 \6 ?1 ?9 a LMODULE_AUTHOR("Tronlong"); S3 T6 q; j u0 @
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MODULE_LICENSE("GPL"); |
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