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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:4 p1 G1 o; J$ [7 d0 d) d* b# x
#include <linux/module.h>
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+ w. Q5 l# ]) s" y! X( [#include <linux/kernel.h>
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& G8 x* \% w9 K# a- x- s#include <linux/types.h>0 m! S+ H8 r$ {3 j! Z& o$ T
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#include <linux/gpio.h>* S0 d. }! R2 o6 N! x
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#include <linux/leds.h>6 `: D' D1 U4 t: K! c+ A; v
4 c- Z4 X# y/ F#include <linux/platform_device.h>
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& ~' f; r# z Z3 V# e! y* G' b5 F; a2 N#include <asm/mach-types.h>
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& G, G" w/ u( W3 C; U& W2 D#include <asm/mach/arch.h>
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#include <mach/da8xx.h>7 v$ a& c9 u* L' ?* D
, b; D% L3 ]0 [2 n5 J e* |#include <mach/mux.h>
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#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)
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#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
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#define DA850_USER_LED2 GPIO_TO_PIN(0, 1) ?" y) f( z7 P+ e0 w6 Z
9 `9 a, d2 l1 X# u9 u#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)- g1 W1 @: o- y
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#define DA850_USER_LED4 GPIO_TO_PIN(6,12), T9 s7 z1 @ B. t* m4 r$ x
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#define DA850_USER_LED5 GPIO_TO_PIN(6,13)
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/ Z( r3 ~+ r6 |5 }) u. P D/* assign the tl som board LED-GPIOs*/5 [- g! g. t" ^+ o7 }6 u# ^
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static const short da850_evm_tl_user_led_pins[] = {* N2 X8 u g: A. I/ K5 ]
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/* These pins are definition at <mach/mux.h> file */
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) q# x$ p! ^9 Z4 D! b5 ]) g4 L2 }( H DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,DA850_GPIO6_12,DA850_GPIO6_13,6 G* U4 v) d8 m( d9 s6 C2 ~
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};$ |3 u2 G: ^3 J. d3 n& b
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1 T) D1 z* O; f( w c- j2 Ustatic struct gpio_led da850_evm_tl_leds[] = {& o& \, d& I) o! a% J
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.active_low = 0,
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) n) \( w4 o' w$ |$ w .gpio = DA850_USER_LED0,
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.name = "user_led0",) v$ l7 v. u" j5 c' Y: f
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.default_trigger = "default-on",- w; k i0 [3 ]: H; h. a1 K" S$ o
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! ]7 u' ^) y+ [# [ .active_low = 0,
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2 D& q5 [; ~9 |5 O1 Z: w: s .gpio = DA850_USER_LED1,
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.name = "user_led1",- N+ ?7 O) w4 u. t" j2 V7 L. X3 Q
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.default_trigger = "default-on",
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{
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.active_low = 0,0 @6 g- S$ l7 A
; K& L* m7 H; I- E, N .gpio = DA850_USER_LED2,
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4 l! D% E( {' U4 o% T) W .name = "user_led2",
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: \5 s1 i: x1 g: u8 d .default_trigger = "default-on",
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4 n3 y1 k/ i% W- h9 @, J7 l .active_low = 0,
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, N1 K' j- ^/ }% D$ K6 J .gpio = DA850_USER_LED3,
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- O5 J: {8 Q7 {: G0 O1 |% Z .name = "user_led3",
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.default_trigger = "default-on",
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+ B* m& Y8 F2 C( t* n3 b: c9 w .active_low = 0,; p" { b$ k. G- H$ X
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.gpio = DA850_USER_LED4,
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.name = "user_led4",- G0 \5 m% J! N9 f& y% M- @
' U5 X8 }$ {+ W9 J5 I" y0 B .default_trigger = "default-on",$ b1 h1 @( t+ f# V7 I
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{
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* i: B- D7 \) L: n0 J3 @ .active_low = 0,' a; T: g& X. {
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.gpio = DA850_USER_LED5,
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. X9 [8 Q* [0 M- n .name = "user_led5",
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* V1 x/ S) o* K( e .default_trigger = "default-on",2 L" R6 [/ [5 t" V
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},
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};
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static struct gpio_led_platform_data da850_evm_tl_leds_pdata = {4 `6 x# r, z( k, u
* l2 z0 X3 z- L- U* }4 C+ B& i .leds = da850_evm_tl_leds,
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. b' n, I- I$ E .num_leds = ARRAY_SIZE(da850_evm_tl_leds),
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};7 F4 S* Y, @6 m6 d- {* `
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, ~( P s( ^6 `' tstatic void led_dev_release(struct device *dev)8 ? A' F" K! U* `4 X& O8 k; a
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static struct platform_device da850_evm_tl_leds_device = {
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/ \& @$ t8 }2 n- I5 V3 |( s. a3 I .name = "leds-gpio",
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; R7 ]0 k# I0 t9 y4 O2 Y .id = 1,
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0 v( |- x1 @& s; J1 I .dev = {
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.platform_data = &da850_evm_tl_leds_pdata,
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.release = led_dev_release,. W- g' [" [/ _. m. L' l" x0 H# D% ~
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static int __init led_platform_init(void)8 s9 u! k e$ b4 _; k0 q% p
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{
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int ret;
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#if 0
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5 b- e- u) ^, G& T ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
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if (ret)6 D( I+ [. n" D6 ]* v
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pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
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"%d\n", ret);( z& z3 H0 {$ n8 b
# |$ X1 h/ D; i#endif
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ret = platform_device_register(&da850_evm_tl_leds_device);( A, Q3 C$ i( W+ F
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pr_warning("Could not register som GPIO expander LEDS");
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printk(KERN_INFO "LED register sucessful!\n");; m# v" ~0 w8 z4 V
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$ K. x& V u9 A return ret; o% g' b$ d- R8 S$ D9 W
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}
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static void __exit led_platform_exit(void)
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{
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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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}
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module_init(led_platform_init);
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& J# T$ T' k; o8 u9 i% V" Pmodule_exit(led_platform_exit);
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( M/ G; {. x$ G8 k+ MMODULE_DESCRIPTION("Led platform driver");* a: y6 b* b( ?7 b% r
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MODULE_AUTHOR("Tronlong");
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, r4 ?; I* f/ l2 `* {9 HMODULE_LICENSE("GPL"); |
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