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板凳
楼主 |
发表于 2018-12-14 17:29:27
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9 M6 e2 H6 Y: L. e: 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:1 f/ w e3 p+ J5 V& q
#include <linux/module.h>% H% F# ^' ?; a8 O7 F9 }. } G. X
1 N- W! f( m! U% K2 M( l) \#include <linux/kernel.h>
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; D0 m2 K) V! I) b$ |9 M- M$ v#include <linux/types.h>& ]( J ]1 j' m
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#include <linux/gpio.h>
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& X& z- | ~: l7 P3 F6 g- q8 N#include <linux/leds.h>
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#include <linux/platform_device.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>- a# U2 f& T$ `3 F# ]- f0 |( c% K
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#include <mach/da8xx.h>. [3 \* u$ @/ t) v9 e
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#include <mach/mux.h>/ ~7 ?( g6 U" T- p2 g& [
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0 M0 K9 T/ e; N4 Q- W$ F2 b Q#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)
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7 V( ?7 W7 I9 V. h1 Z#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)& L1 _- o8 o' J' Y& k' Q6 |6 H
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#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)5 \: E; O P, [8 u
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#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)& m1 P; Q2 ~ j x7 p
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#define DA850_USER_LED4 GPIO_TO_PIN(6,12)# p7 i5 H0 V" K+ @& L! C- T7 \4 f
; f5 X. s, ?& b. b) r4 c0 _( b0 J#define DA850_USER_LED5 GPIO_TO_PIN(6,13)! b/ X* l0 P1 \7 y3 w
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; ~2 p, e7 w, q0 }' n/* assign the tl som board LED-GPIOs*/
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static const short da850_evm_tl_user_led_pins[] = {
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/ C @2 g& @6 t. P+ l2 t# x /* 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,; M; |/ D* E+ ]7 p4 @5 U
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* o6 R6 G/ M: ^. H; Z% ~: nstatic struct gpio_led da850_evm_tl_leds[] = {
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.active_low = 0,1 _6 H0 X2 p h G
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.gpio = DA850_USER_LED0,
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9 v: d' Y' U$ P _, X& e .name = "user_led0",3 }$ f5 D [# P0 b
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.default_trigger = "default-on",. b8 q" a( G9 x+ k% T
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},
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{
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6 F' D1 k( H) ^- e. U6 [1 p .active_low = 0,
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8 n& l" O4 P- ~7 v: M .gpio = DA850_USER_LED1,
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.name = "user_led1",, S5 S5 \; N7 \; {6 E- K9 c
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.default_trigger = "default-on",
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},
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.active_low = 0,# W9 W! E7 H+ D; m% y0 T. `7 ^
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.gpio = DA850_USER_LED2,
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.name = "user_led2",
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.default_trigger = "default-on",8 b& n2 g6 G8 B( `1 t: ~; {: J
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},
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.active_low = 0,# E4 F0 g$ r& o" u+ _+ w
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.gpio = DA850_USER_LED3,
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.name = "user_led3",. N2 k3 j- Q/ O8 r2 e0 A4 `" t# F" A3 A
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.default_trigger = "default-on",) H2 n( ~3 x" A% G! G
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},
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.active_low = 0,- ? \/ {. ?3 p" ^
0 k Z0 P7 Q0 Q. O: v/ D .gpio = DA850_USER_LED4,$ ?# P3 n9 Z8 Z$ C/ i" ?+ h
6 j I1 L( c+ P0 E .name = "user_led4",
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) r. E& y( z7 h .default_trigger = "default-on",6 Q. k8 Y1 {5 y7 {" J5 e- L3 n. A
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{
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.active_low = 0,4 a9 H0 X; H9 Y) M2 I$ C! \5 m
w! }& M" r( v .gpio = DA850_USER_LED5,: {1 H- D8 S' b! I i- ]4 K
1 ]& H. |' I2 F' n6 {' j6 X% V .name = "user_led5",
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.default_trigger = "default-on",
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; b6 q5 n0 [5 [5 Pstatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {% r8 e! w4 B4 Q( b7 L* \% C
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.leds = da850_evm_tl_leds,
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.num_leds = ARRAY_SIZE(da850_evm_tl_leds),
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9 K9 U, a* r% f8 J4 j1 pstatic void led_dev_release(struct device *dev)4 \7 u- [$ A) ]) {
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/ @9 r$ v. I/ K6 w7 N- ustatic struct platform_device da850_evm_tl_leds_device = { V. n/ O6 T( R! j' |. Q5 \
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.name = "leds-gpio",
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.id = 1,
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4 \% A) v( U* l4 Z% Y) E8 w .dev = {; ~. C1 C% @! }) j
$ N0 Q6 @& y9 G" Z( I- `/ n .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)5 V$ I/ O. \% f k
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int ret;
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#if 01 r) G) R3 N3 C3 u. _
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ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
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if (ret)7 T( Z( _( o) M, W, {# R$ H8 r
6 e4 z/ b. v. f2 W( W pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
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* [# v8 I5 |2 O/ C( ^ "%d\n", ret);
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#endif
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# `$ @+ S5 |. V5 m) a& R ret = platform_device_register(&da850_evm_tl_leds_device);! G( m5 V6 a1 n: }
: ^1 @7 n# X& f7 G4 o* X" Y if (ret)
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pr_warning("Could not register som GPIO expander LEDS");2 M. k; l1 k& j% P3 j
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else6 u8 v, p0 P" x$ R' F
5 J! J% g" K* K6 M/ t6 @. P! a printk(KERN_INFO "LED register sucessful!\n");
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return ret;; x5 d7 G+ u. V$ j
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}
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+ S0 G) |, L. |9 H; Nstatic void __exit led_platform_exit(void)- k1 p+ u* M7 v: e; c/ o* u
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platform_device_unregister(&da850_evm_tl_leds_device);0 ~, |7 `& @4 V; c" u7 u, T
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: y2 }( {& \4 @* [. N, ^( q- A+ B- c printk(KERN_INFO "LED unregister!\n");: M: J5 f# ^7 ?4 I4 z9 o
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; }- q- y3 l" n- ~7 u6 E' emodule_init(led_platform_init);% u0 K- s8 u# i0 Z! y" u
' A4 \- y c/ p) X% G. C' jmodule_exit(led_platform_exit);/ z7 P, l- ~: g9 s' X, T4 z B
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MODULE_DESCRIPTION("Led platform driver");3 ?- l$ D) f' Z! p# [/ g: ]# ~. |
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MODULE_AUTHOR("Tronlong");6 L' q; g" n8 c2 ]+ e
# Z6 a. [( D/ G& F# T; z. L% UMODULE_LICENSE("GPL"); |
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