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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:
, t/ w% e( x1 F/ @#include <linux/module.h>
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#include <linux/kernel.h>
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( {$ B6 a$ V# {/ a$ S4 f#include <linux/types.h>
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#include <linux/gpio.h>/ n) E( f: h4 v* E4 a
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#include <linux/leds.h>% u7 G7 b+ o( z
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#include <linux/platform_device.h>: E( v5 U$ X: U3 o# I( t
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>4 b6 i& K# l# Q" W' G
|1 ~/ Z9 Q1 N7 p' z7 h: j' M1 }#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), Q" S/ x! o: ~$ \; j
, d1 s$ f" y: Z% D! F. K$ }#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)* {: P8 _* v5 Y4 A7 ~
; b5 T {, x1 `& i1 {#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)
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& x3 q2 i, c1 F1 [8 t#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)# ]1 V: A; z* v A9 S8 `- b
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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)4 U' B% k, f" N/ r- r0 a5 _' H5 ~
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/* assign the tl som board LED-GPIOs*/3 H& K. I& Q9 \; k: e5 g
4 g! P8 w# S( K0 Estatic const short da850_evm_tl_user_led_pins[] = {
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. }1 Y5 D5 v! J/ u2 A; Z /* 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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2 ?2 d4 x$ ]' Q& d' {/ nstatic struct gpio_led da850_evm_tl_leds[] = {" ]7 O1 `& |" m0 S
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.active_low = 0,, @3 s! n3 f. O, ]* h5 y& _0 q
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.gpio = DA850_USER_LED0,+ E3 E/ N v* O
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.name = "user_led0",
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, ^! e; L9 a8 t .default_trigger = "default-on",
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{
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) [. s" [# D/ c! n: X .active_low = 0,) l; _" z$ @' d& r. \" @' A
3 f" G: _3 v: d% h) H .gpio = DA850_USER_LED1,
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.name = "user_led1",
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1 ]; k. ]4 u) M2 f5 u7 ~4 d* g .default_trigger = "default-on",
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},
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6 R( L% q& N% G: W& z .active_low = 0,
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& v% G9 h2 q1 o; t5 E2 C7 Z4 {, y .gpio = DA850_USER_LED2,5 s, T# C0 e* x9 e
8 ^8 k+ P, H, u' h% C+ l .name = "user_led2",: D3 B( n$ z; e% t2 f3 Y
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.default_trigger = "default-on",4 ]# X6 m' j' N# R
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},
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{
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; B! q" }6 l0 `& u0 ^2 f .active_low = 0,& a; Y; L8 r4 |" l) E1 N" ~- `
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.gpio = DA850_USER_LED3,. y) r [! x0 a. T k
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.name = "user_led3",
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1 z- x H; w' N1 S2 L% k* P .default_trigger = "default-on",
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# K3 d' d) D' `( ^1 K {( s R7 ^* w9 ~
. y; o/ E4 \: u2 W .active_low = 0,
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# N5 [5 g" O! i' m4 a' k& B# e .gpio = DA850_USER_LED4,1 Q5 O5 \3 _* G
" g+ {9 R' Z, Q7 \2 m" t* |3 L .name = "user_led4",8 t* [, ~0 [% R* `2 [( I; d/ t
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.default_trigger = "default-on",
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.active_low = 0,
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8 S9 U( a# r% D+ z p7 e1 k# l .gpio = DA850_USER_LED5,
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( |& S$ Q+ l( ~/ _ .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 = {
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R) |6 L1 X% g$ T& D, R .leds = da850_evm_tl_leds,
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.num_leds = ARRAY_SIZE(da850_evm_tl_leds),
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6 _* N6 ?/ k; @" ]: s0 F: jstatic void led_dev_release(struct device *dev)
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static struct platform_device da850_evm_tl_leds_device = {; ~1 X) i9 `) L& ?& t0 k0 {1 V9 f' K
. W" f5 h, l) g# _1 k/ [& d .name = "leds-gpio",2 g9 Z8 \+ V- ^+ v$ i
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.id = 1,
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" s+ j: d Y$ ]3 c$ B+ K$ C .dev = {
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.platform_data = &da850_evm_tl_leds_pdata,# I! b7 y% p8 ?6 `( C; B" L& M
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.release = led_dev_release,0 v( r5 w/ _6 v& ]) {0 J3 W
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}; j" m4 V1 A- G4 m8 W; q0 ^6 d
o+ r3 V# H5 W7 i4 M8 r# l};
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static int __init led_platform_init(void)% }% o y! S6 Q
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{
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int ret;
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$ K H" s" `3 ?7 S& v6 I ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
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if (ret)/ U* K- @# s, n5 v
* ?' B$ N9 J9 c# w8 A pr_warning("da850_evm_tl_leds_init : User LED mux failed :"# n, L+ V1 ^- v% k1 U- G, s. N
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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);* @! \1 g, A9 d3 g. O
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if (ret)* B$ c2 X: _$ {
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pr_warning("Could not register som GPIO expander LEDS");6 Y) u. F5 k2 v+ E; g3 X* V4 N
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else
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7 d9 u6 g( P* U" ` printk(KERN_INFO "LED register sucessful!\n");! B; {. }4 H$ p% I6 c3 L# D7 v
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return ret;8 I) R5 K- g' P$ G
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% h$ v v8 z$ Q, E7 y2 j) Sstatic void __exit led_platform_exit(void), }2 B; D+ R1 c+ n
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7 z: u* M1 c7 n" [7 b7 _1 s platform_device_unregister(&da850_evm_tl_leds_device);9 m( `8 F; j, m. x6 f/ C1 F
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printk(KERN_INFO "LED unregister!\n");
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module_init(led_platform_init);
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module_exit(led_platform_exit);; ]. v" f- c9 {+ w/ n
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MODULE_DESCRIPTION("Led platform driver");! \8 r; E$ @) z7 ^7 d- {
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MODULE_AUTHOR("Tronlong");
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$ g% U5 g0 g4 y5 `MODULE_LICENSE("GPL"); |
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