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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:
! Q7 f5 B) l5 o; X9 T. }7 e/ ]#include <linux/module.h>1 ^( @7 L9 J8 j0 Z! v1 S! q. r1 J1 t0 X( b
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#include <linux/kernel.h># O: A3 S7 D' A$ e) ?( L9 }& V; x9 B
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#include <linux/types.h>
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# |9 Z. m. `7 x) }#include <linux/gpio.h>& p) ~: u' K6 [. n
7 E6 L5 A/ k3 o3 K1 D+ \! @6 U#include <linux/leds.h>) C5 s, G/ f% L6 R
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#include <linux/platform_device.h>
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#include <asm/mach-types.h>
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9 h4 X& r; S' W8 y0 {5 ^2 |#include <asm/mach/arch.h>
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) Y. I+ Y7 w+ h' H9 Q3 ?8 ?* i#include <mach/da8xx.h>. U* ^: n' u, y6 H) X- y
: b/ S" {9 `1 A; G#include <mach/mux.h>/ ?$ r& B4 L! e+ U% }9 c2 k
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#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)
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; L8 }4 y2 u+ b2 w9 {! ?#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)( ^/ b6 D( \: K3 h
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#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)
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8 T) ~, o" w* I. B, }#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)
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#define DA850_USER_LED4 GPIO_TO_PIN(6,12)7 ^" [: W2 G0 r" ?% Q
% X; l7 \+ Y s i, p% G#define DA850_USER_LED5 GPIO_TO_PIN(6,13)
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/* assign the tl som board LED-GPIOs*/* ~; V9 S: a: Z! Q! N
" n3 |- g9 ~1 m- wstatic const short da850_evm_tl_user_led_pins[] = {
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- }6 }2 C9 q2 l5 J9 m' |: N& a! ` /* These pins are definition at <mach/mux.h> file */0 E* [! @8 f' c) r% o6 L
) M; G# N: x2 Z) T7 I DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,DA850_GPIO6_12,DA850_GPIO6_13,+ P( D; X: w1 z0 w4 Y0 a
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-1
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};
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' N% B9 L3 B# vstatic struct gpio_led da850_evm_tl_leds[] = {) B. }% R/ u+ G1 x. `+ c
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" ~; j. e3 a+ _ .active_low = 0,
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0 {9 M# v" }% B) G .gpio = DA850_USER_LED0,+ R# q4 _+ r3 P
2 F: E8 t+ B) d( Q- d6 w8 f .name = "user_led0",
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.default_trigger = "default-on",9 }+ ^1 G0 V6 f" s4 t* ]9 H, f9 h
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{
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! ? e# f l1 ]- p2 o* R" D .active_low = 0,
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a2 q2 ^' ?# d& b .gpio = DA850_USER_LED1,
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8 U2 H( A$ g; t9 V9 u .name = "user_led1",
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# |4 ~9 n p L2 j .default_trigger = "default-on",- G' v6 m# F% B7 l& \1 e" l$ Y. l
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, ^/ u. F+ l$ O( \% A& n .active_low = 0,: |' ` ]/ e, A7 ?) I3 ]
6 D$ @& ~* z2 E+ z .gpio = DA850_USER_LED2,3 K8 `1 k- f8 J( g
6 d# e6 t% }. x- @, e9 Q7 [ .name = "user_led2",* {' P% p4 t# G
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.default_trigger = "default-on",
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},
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) N; V2 Q! t2 Z- E .active_low = 0,
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.gpio = DA850_USER_LED3,
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( O" N: P8 ~3 ^* G5 |% l* K .name = "user_led3",
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.default_trigger = "default-on",
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{
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.gpio = DA850_USER_LED4,
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.name = "user_led4",* m) e& j1 T9 V1 R
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.default_trigger = "default-on",
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{
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( {& I9 V* L- j. Z' O+ A .active_low = 0,8 ]' c9 g1 c( B. |: j/ c
* B1 X6 G( x' F5 t7 B& `- Z .gpio = DA850_USER_LED5,$ X8 @; x) D* v/ t. p
4 }+ Q) x# b J( X .name = "user_led5",* e1 k8 R9 z3 u" D
$ l# y& t& Q5 H( |1 S: N0 @ .default_trigger = "default-on",' M7 i- f# A$ C& h
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6 a" B8 N S- V0 v$ \};
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- B. Z6 C6 U8 D, k% Z. C; A$ mstatic struct gpio_led_platform_data da850_evm_tl_leds_pdata = {9 i$ S3 p, W* V6 q
. _" H% H( u9 O7 _' E .leds = da850_evm_tl_leds,
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/ o5 x( F9 h$ f% G/ _ .num_leds = ARRAY_SIZE(da850_evm_tl_leds),
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/ H8 w$ g6 `! ^7 o4 ~, B4 Cstatic void led_dev_release(struct device *dev)
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{
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};
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static struct platform_device da850_evm_tl_leds_device = {/ c0 N B8 E. j
: g# ]) Q3 }: A2 O .name = "leds-gpio",3 ]: `0 \1 O7 Z8 W' k
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.id = 1," L4 [0 h: G) n* X- e, b8 {4 w, r% U
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.platform_data = &da850_evm_tl_leds_pdata,5 a5 H% T0 v3 f0 j$ T
+ v- ?4 y% }) H& ]3 B1 w5 E .release = led_dev_release,% Y, A; F9 t+ e: |
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static int __init led_platform_init(void)
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{
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; g: c8 |, D; u3 u int ret;
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ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);3 H5 }1 H m# m, H1 s* L* k+ q
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2 K" v5 A) D B! n4 E pr_warning("da850_evm_tl_leds_init : User LED mux failed :"# u& e" ~+ R1 _5 x" V
6 l. R' z* J, c% | "%d\n", ret);
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* p! t( E' b$ S. \#endif
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ret = platform_device_register(&da850_evm_tl_leds_device);0 b* o/ | D8 U$ e2 S6 Y! ]* x
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if (ret)# P+ w! n* ~% F' t6 i
0 j! B# W6 r7 x, v9 |! y pr_warning("Could not register som GPIO expander LEDS");
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printk(KERN_INFO "LED register sucessful!\n");8 _8 @* M# U9 O) \
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2 I" _9 D2 q5 f a, {; D! v- g return ret;
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static void __exit led_platform_exit(void). s3 M; V, ~, ~# _3 K! y6 x; `! W
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$ v/ V) b% Z1 N" m; Q; P6 o L platform_device_unregister(&da850_evm_tl_leds_device);1 X' N% c3 p. I
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7 T8 G7 p O% V9 ?# v printk(KERN_INFO "LED unregister!\n");" |: s2 g- i: f" Z6 @, k2 H, Z
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}; h' r$ i6 y9 @& t1 X
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module_init(led_platform_init);
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; Y% Z& \/ W L8 |module_exit(led_platform_exit);
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MODULE_DESCRIPTION("Led platform driver");" f- ?( |1 q1 ?8 X# Z
0 P" y2 V2 ~" ]: H0 |2 c7 IMODULE_AUTHOR("Tronlong");7 v, K3 X# ^+ Q( q7 x/ H8 |
1 L0 a5 |% A0 Z n" A6 u9 i9 h1 FMODULE_LICENSE("GPL"); |
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