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板凳
楼主 |
发表于 2018-12-14 17:29:27
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7 ~: W5 q& {/ G2 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:
3 y0 H) _6 [2 g#include <linux/module.h>' v4 G1 `% P1 g7 T$ F- ?
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#include <linux/kernel.h>/ y) o, b# R" N# ]0 o5 \
. w2 Z' W2 S! V( m* Z6 I& j#include <linux/types.h> v) W3 Z& K+ d
1 ^5 s* F; j3 D* a! w#include <linux/gpio.h>
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#include <linux/leds.h>
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#include <linux/platform_device.h>
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#include <asm/mach-types.h>9 J5 T; K) i* Y. t3 `) l4 v$ {
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#include <asm/mach/arch.h>
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$ ^: a( ?& q9 q- ]6 z#include <mach/da8xx.h>2 L/ r3 B9 h$ C1 j7 t/ f
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#include <mach/mux.h>
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X& i5 m: u) ^% i5 x0 S! t#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)* n4 v: Z' Y0 \1 q9 J- L
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#define DA850_USER_LED1 GPIO_TO_PIN(0, 5); j- k6 {. r l. z. B
& i( u" a, H* G#define DA850_USER_LED2 GPIO_TO_PIN(0, 1): n7 M) m5 q. ]6 d
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#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)
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#define DA850_USER_LED4 GPIO_TO_PIN(6,12)
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+ F* I3 B! Q! Q8 H#define DA850_USER_LED5 GPIO_TO_PIN(6,13)
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/* assign the tl som board LED-GPIOs*/5 U& c0 o; E+ u M S4 N$ S: n
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static const short da850_evm_tl_user_led_pins[] = {5 p1 C' \& _7 R/ \2 g' C
/ E- c$ l# T" Y) r /* 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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};
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" M: m' n) K" I+ astatic struct gpio_led da850_evm_tl_leds[] = {
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+ e R3 b) O* V1 d( o .active_low = 0,! A: _( X. @7 \
1 i& R4 _* W" a7 S1 m .gpio = DA850_USER_LED0,
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.name = "user_led0",
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.default_trigger = "default-on",
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},
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{
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.active_low = 0,
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* H& S. T2 t! a9 z .gpio = DA850_USER_LED1,0 f' ]- N! X# j {3 \9 c
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.name = "user_led1"," d# A, P/ P/ Y5 H; T
" S5 g0 o6 z/ R# _' e' M .default_trigger = "default-on",) Q4 D+ l9 v' I x: J+ q9 w- G; ?
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{
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2 {/ Y5 O& d1 n3 i' v .active_low = 0,) d! T1 }. Z' K6 Q1 i( T
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.gpio = DA850_USER_LED2,
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4 ~8 @/ a, D# d* C. s .name = "user_led2",
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# v" j' b' X5 S1 L .default_trigger = "default-on",
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{
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9 { k2 f$ w5 |+ e! B+ d ] .active_low = 0,
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4 | K" m T# G6 r .gpio = DA850_USER_LED3,
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.name = "user_led3",1 r! d- N+ y! z7 N! }1 R' X
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.default_trigger = "default-on",9 S0 _' O% R5 _/ }" O0 v
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9 Y7 k: H% q6 \# w/ N4 v .active_low = 0,
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9 M3 W {. S. J# c2 r$ `. w .gpio = DA850_USER_LED4,7 u! B7 |1 x- p& Q+ q. a
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.name = "user_led4",# I% c$ N0 z, w/ }7 m/ K! O$ G
9 v) k; @( A1 C& v .default_trigger = "default-on",
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.active_low = 0,. k Y5 i# D( B7 c5 {6 F# P, T! w9 x
, Y) B( t5 d3 R3 y .gpio = DA850_USER_LED5,
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.name = "user_led5",
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/ h: u8 N) f! \* k" w0 c .default_trigger = "default-on",
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};
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" `+ H' }: n+ C- Y2 Istatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {& D2 H. v. B2 f
6 c$ O# A) |& t3 f .leds = da850_evm_tl_leds, ~' C" Q, \1 A* w' M
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.num_leds = ARRAY_SIZE(da850_evm_tl_leds),4 f; |4 `! B, s
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};* I5 P2 V6 k, ^( h8 {9 m) F
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static void led_dev_release(struct device *dev)
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8 ]1 R4 c) f: B1 z3 B# V$ h0 W! U# f) gstatic struct platform_device da850_evm_tl_leds_device = {
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7 d' B- r7 R: r4 }! e .name = "leds-gpio",
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.id = 1,
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.dev = {, ]3 h0 X9 q5 M# B1 b2 G
* |* Z9 M" w8 }. u; O5 X7 A* Q5 Y# } .platform_data = &da850_evm_tl_leds_pdata,, \1 o( @! G1 ^4 t: e6 S
' ^4 a$ J5 C5 l' [0 R: ] .release = led_dev_release,
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};
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1 K$ S8 |0 P( I2 ]& Ustatic int __init led_platform_init(void) j! P9 ~- w) C& v R
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int ret;" e3 D3 L7 ^( I O! X
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ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);$ ~8 _. A5 Q( L6 [5 {
; p) K0 K8 [" a5 F$ Y, S0 y if (ret); l+ R3 S5 u K+ x. a$ r3 [" Q' r
" @! r3 t5 \4 W- f' u pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
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"%d\n", ret);
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#endif3 m* |, Y7 A! D1 ?) q, q- z
$ y: q% \0 C% z. m ret = platform_device_register(&da850_evm_tl_leds_device);/ C" T! `9 n, I! f" t; J
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if (ret)
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2 Y* F/ U( o/ o- K pr_warning("Could not register som GPIO expander LEDS");
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5 i8 _0 s/ V- B# { S% }/ C printk(KERN_INFO "LED register sucessful!\n");8 d4 S( e. @; i) z2 r) k/ K8 K
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return ret;
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}
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! k( O) c4 V6 ?' Ustatic void __exit led_platform_exit(void)4 d8 M8 k& l" k
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platform_device_unregister(&da850_evm_tl_leds_device);
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/ u- c4 @- z; b. N7 M0 j: }2 } printk(KERN_INFO "LED unregister!\n");
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9 d* a' G' w, X. g( L5 Xmodule_init(led_platform_init);- c" D1 U1 b* E) j' [
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module_exit(led_platform_exit);
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0 S; D" z+ h8 ~; EMODULE_DESCRIPTION("Led platform driver");
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MODULE_AUTHOR("Tronlong");
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MODULE_LICENSE("GPL"); |
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