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板凳

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发表于 2018-12-14 17:29:27
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. ~! n" J) Z0 u. `$ g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:, V4 B3 Z3 E: t4 Y5 P
#include <linux/module.h>
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#include <linux/kernel.h>% d! W1 x8 |1 J& ?" c- [% z
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#include <linux/types.h>6 m C) }' X( n D
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#include <linux/gpio.h>
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#include <linux/leds.h>
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6 i1 e& u5 G$ {8 H#include <linux/platform_device.h>' d5 [, H2 o1 w, B' B; ~/ j
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#include <asm/mach-types.h>
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h+ d+ m- }9 w! H; Y0 ~& [#include <asm/mach/arch.h>
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#include <mach/da8xx.h>9 g4 i3 x6 j0 Z) g% Y ~
9 r7 e) k, b( y#include <mach/mux.h>
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' B& ~ {% R2 B0 ?% ]+ d#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)6 n$ K3 \% M$ e. U/ R
5 y# d2 G! O* q0 m#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
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4 T. e) r8 e9 q3 s#define DA850_USER_LED2 GPIO_TO_PIN(0, 1) t' D6 n+ B& I' _: i$ G! e
; E6 ~: J5 g; q: ^9 |6 o#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)
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#define DA850_USER_LED4 GPIO_TO_PIN(6,12)* a4 x7 S" {; v
. N& H# ? k" H#define DA850_USER_LED5 GPIO_TO_PIN(6,13)
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2 ?% [1 I+ X' I/* assign the tl som board LED-GPIOs*/
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, s2 g" M' H8 T _1 e- vstatic const short da850_evm_tl_user_led_pins[] = {
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" h& l) F5 ?9 G r' @! d# [ /* 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, E& x$ `0 q+ Q8 Q
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-1
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; G# ` Q( V) e5 K8 M9 a ystatic struct gpio_led da850_evm_tl_leds[] = {5 ~( \% ^" G" l z. b
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{
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$ W6 {* `! `5 T8 h. Y% I .active_low = 0,
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( c' N7 p. E: I% w9 l( W .gpio = DA850_USER_LED0,; l6 Y ^8 D0 S1 K3 r
: S# n3 @' b5 s+ J .name = "user_led0",5 T o2 O9 _: i! Q' }- @
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.default_trigger = "default-on",
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0 o) z4 G5 i: d5 k .active_low = 0,
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Q ]5 t5 [/ y3 s) Y .gpio = DA850_USER_LED1,
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.name = "user_led1",
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, t/ I; P8 c C) o! q .default_trigger = "default-on",
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},
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( a$ d! }6 U& K- s+ v( C/ q0 y, { .active_low = 0,
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, F* Z% @1 Z% c9 B# C) x .gpio = DA850_USER_LED2,! r8 a( |% N) |9 t3 J- {; x
2 R; r. o: w9 Y+ w9 \ .name = "user_led2",
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" o( k, ]2 n" `* u6 n2 b .default_trigger = "default-on",$ ~$ A2 U# ^4 @1 ]) c9 b
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.active_low = 0,
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.gpio = DA850_USER_LED3,! {$ D8 L+ B' `, I) U0 L, J) z2 V
8 j9 g' f& l% o7 } .name = "user_led3",( w0 O' h1 @2 q, Y2 C6 `! w
# q% ?# E$ J( H2 C! x .default_trigger = "default-on",
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2 I* u* i3 a; b" {5 g& W6 |0 d .active_low = 0,
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.gpio = DA850_USER_LED4,
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.name = "user_led4",9 \9 F M t) @: s9 R* S: t
0 `: \1 r* P' a% ^ .default_trigger = "default-on",
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{
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.active_low = 0,9 c* T4 P& B# ^$ l1 R0 t$ ?
- t5 e( z6 d0 i* B& t! g, x/ W* C2 [/ y .gpio = DA850_USER_LED5,
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5 f6 T, O% w9 @: S .name = "user_led5",$ d7 I+ E6 x8 D6 K
1 V+ S! k' ~" Y+ c% \, A .default_trigger = "default-on",2 l Y# _9 Z+ f5 U
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9 }0 c) \* b) ~/ g5 estatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {8 k7 s) V' \- J4 A5 \
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.leds = da850_evm_tl_leds,
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.num_leds = ARRAY_SIZE(da850_evm_tl_leds),' X5 O( Y: d* h& }6 n# I
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9 l& p2 H- [# d" |6 m2 Pstatic void led_dev_release(struct device *dev)
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};
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static struct platform_device da850_evm_tl_leds_device = {* a1 y( B. K3 S9 h; g
( O3 {0 y; Q* G$ i- z; O .name = "leds-gpio",
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' B ]0 u3 ~# ?0 p .id = 1,2 v1 ` @/ N5 Y. G* N, F
8 ^* a1 ^# L# R/ t$ d4 R6 D; X4 I2 J .dev = {0 P2 S" G# Y0 G$ W0 r9 A/ u' p
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.platform_data = &da850_evm_tl_leds_pdata,
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.release = led_dev_release,
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};! ?7 H% n! z( W9 w0 A4 X& U
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. Q d4 z% k$ k7 ~6 bstatic int __init led_platform_init(void)
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$ X. h$ a! G( P int ret;
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#if 0
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- E& W9 U% [# y( H. G ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);/ ]# w* E% [2 y0 c: R' l' U! a
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pr_warning("da850_evm_tl_leds_init : User LED mux failed :"& U) x1 U F4 V5 m- v2 V$ u
' w9 V5 v% p* |2 i& N/ E! y "%d\n", ret);
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#endif, o" o# _$ M5 z0 F, z& w
" P0 D/ f* }: o, ?. H) D) f" n6 o ret = platform_device_register(&da850_evm_tl_leds_device);8 k; i9 t5 | I% E( ]
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if (ret)
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5 \) u0 N9 H% `& q% x) F& A pr_warning("Could not register som GPIO expander LEDS");
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printk(KERN_INFO "LED register sucessful!\n");* t: t; r, u0 B
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! _5 I5 f7 {5 P) g; t P return ret;
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; I) E$ U( ^( X7 i% M: B4 e1 `4 r+ Sstatic void __exit led_platform_exit(void)$ r5 l6 \6 p% P5 T! U
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{
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; ^! @, L0 [2 ?& l* e' d0 N1 h platform_device_unregister(&da850_evm_tl_leds_device);: Y8 t/ Z2 P$ J5 J- K% j0 j* C
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4 y+ O7 P5 m, F4 d) H9 Y printk(KERN_INFO "LED unregister!\n");
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/ M9 H- N: S. |! }' {module_init(led_platform_init);7 X! l/ I( Y/ ^# m. C
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module_exit(led_platform_exit);+ I2 S# u3 z3 O( h' L1 N5 \+ R
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) \( t0 Y9 A1 V6 RMODULE_DESCRIPTION("Led platform driver");
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4 ]* K& T K7 b' vMODULE_AUTHOR("Tronlong");
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' L" j6 h- J4 L0 p5 C. fMODULE_LICENSE("GPL"); |
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