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板凳

楼主 |
发表于 2018-12-14 17:29:27
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只看该作者
4 M% P' M+ e- `% s* R/ ^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:
2 s5 z- s( w4 K" Y/ Y0 w/ L#include <linux/module.h>5 J" U7 ]8 c* o1 [5 P
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#include <linux/kernel.h>
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- r; s7 U# v' L1 j9 `6 q#include <linux/types.h>
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' U' ~* i% m7 i( J#include <linux/gpio.h>
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#include <linux/leds.h>
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, v9 F- R( N5 w& c9 h' s#include <linux/platform_device.h>" _. o) d, n0 |1 ?1 c
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6 J# `! J- o2 i3 u( u7 u3 Y" b#include <asm/mach-types.h>: x+ |/ J, G, \+ i" ~$ ?$ Z$ L
& I) {# w1 K' \! v#include <asm/mach/arch.h>5 k" ^9 H7 m s1 c' s" W0 z3 ]. L2 q
! }9 C0 }- J- Q9 s6 q0 M" `#include <mach/da8xx.h>
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8 k* V) P' ~- e5 h) @#include <mach/mux.h>
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#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)# a! p3 }; N7 Z" g, U$ b3 [: F
" y, I# \/ L- T+ s8 o: I#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
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#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)
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% ?! |& u/ R6 t# ~9 X# J) c" \#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)7 y; v& H& s0 | I5 J
+ c6 k) g$ w$ L) d. e# f/ b#define DA850_USER_LED4 GPIO_TO_PIN(6,12)6 _0 I9 l- o0 K8 _7 F/ d. p2 K+ k& x1 ?
. {: F9 W3 M9 c#define DA850_USER_LED5 GPIO_TO_PIN(6,13) s3 l, Z3 W3 X- V& X1 u. b
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/* assign the tl som board LED-GPIOs*/
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* v4 F: l6 i4 W, Estatic const short da850_evm_tl_user_led_pins[] = {
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! X1 _: g6 p% ~' |5 n% T: u/ T6 o /* These pins are definition at <mach/mux.h> file */
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) w; h7 I1 C5 P% p A2 l DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,DA850_GPIO6_12,DA850_GPIO6_13,
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6 I8 v( [+ b4 X/ [# x! V1 Q# R8 N};
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static struct gpio_led da850_evm_tl_leds[] = {7 \6 ~ A; x. q0 y7 w. b" E
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{
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.active_low = 0,
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.gpio = DA850_USER_LED0,; E' J5 e: K; e; c
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.name = "user_led0",
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. c' g3 h! I7 X& w* j0 k* u .default_trigger = "default-on",- i/ }( g/ F" r
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- c* `: ?8 W1 D+ K j& a .active_low = 0,
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.gpio = DA850_USER_LED1,
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.name = "user_led1",$ S! d3 [. o* c C. g% C I
8 a* L* B; `; {: O1 l# H9 Y F- [ .default_trigger = "default-on",
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{; M, A8 S0 R% D+ |% b8 n1 E$ ] {
$ G& [6 J8 Q. q( o .active_low = 0,
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3 v. b: a7 ?, p .gpio = DA850_USER_LED2,* l2 N! r4 C' A4 W
# S7 I% B& w) Z. ]2 ] .name = "user_led2",- F+ W) g o; j0 g
) i6 N4 Y; v5 T/ t .default_trigger = "default-on",
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{
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.active_low = 0,
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.gpio = DA850_USER_LED3,
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5 G. Q/ P) C P0 v, _' {( r4 h2 v9 B .name = "user_led3",
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) p, x# T! r' \! W+ J' R .default_trigger = "default-on",# a+ I7 v/ f" U+ [2 H! M" m: e
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}," {) }# w, v7 L3 H
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.active_low = 0,
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* m9 Y; C* i/ m2 v$ k .gpio = DA850_USER_LED4,
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.name = "user_led4",
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.default_trigger = "default-on",3 w/ s: ~/ D) C$ g* Q. ^; G1 C
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{
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.active_low = 0,* E K1 _# \3 v8 }0 ~4 S, ^% U
7 Q% S# }. A( r .gpio = DA850_USER_LED5, l1 o/ U4 x7 I4 Z$ h0 K; m1 G- m
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.name = "user_led5",
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.default_trigger = "default-on",/ c+ j/ j9 }/ L0 @) G. t7 b
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},
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# M) N {' b& N/ x& hstatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {
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$ |$ H! {0 y& B& s .leds = da850_evm_tl_leds,
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2 ]4 q- R, V- v0 [$ C% S( I .num_leds = ARRAY_SIZE(da850_evm_tl_leds),
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};: V0 B0 @, R: f F1 x! a
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E& x3 y+ t: `/ gstatic void led_dev_release(struct device *dev)$ l/ F. ?8 v# b _4 _
" F( d J2 v' ]/ ?{
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};
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+ c2 w& D4 u1 O& ^, Bstatic struct platform_device da850_evm_tl_leds_device = {4 ?- j, K7 B3 y$ X; i% ^" n+ ]6 C
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.name = "leds-gpio",- ^! f. K) ]& o6 t2 j8 C6 U% w
$ \+ H) F4 l W .id = 1,
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, L2 c4 y3 t# k' J) A$ o .dev = {
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4 V& O4 d6 h# |* Z& W4 M4 N, ? .platform_data = &da850_evm_tl_leds_pdata,+ Y3 t# C3 E, k" j# ~% i" e
4 P( s, h- M+ l. } .release = led_dev_release,
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}
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static int __init led_platform_init(void)
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{
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4 Y( I5 [$ a- |# F int ret;
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#if 0. v$ a7 b) a& @( M3 U
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ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
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pr_warning("da850_evm_tl_leds_init : User LED mux failed :"0 q0 F# h: z: F y/ Y
7 w1 `; Q+ c, { "%d\n", ret);
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' \9 W$ v* U9 {#endif
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ret = platform_device_register(&da850_evm_tl_leds_device);
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% B4 Y3 ]8 D5 D* Y if (ret)1 ~5 `* k0 H/ ^& N* J& W+ x* E
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pr_warning("Could not register som GPIO expander LEDS");
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+ \4 N) g( @0 u else
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printk(KERN_INFO "LED register sucessful!\n");+ i% i& Q1 M* _1 `' N$ E
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return ret;9 ~) b+ F7 j) L) C8 q+ D& Z
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static void __exit led_platform_exit(void)
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" b" ~( d M* A6 q$ [* t. w platform_device_unregister(&da850_evm_tl_leds_device);
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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);/ w3 [9 w `9 h0 w) R v" y3 v( T
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MODULE_DESCRIPTION("Led platform driver");2 b# E) e) y$ ?1 |, e0 J
6 e* v6 h4 F4 f5 [# s" h% Q0 i& qMODULE_AUTHOR("Tronlong");- q9 p+ h \* O! A4 S
& ^- V) N; h, q' _' t7 U& UMODULE_LICENSE("GPL"); |
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