|
板凳
楼主 |
发表于 2018-12-14 17:29:27
|
只看该作者
+ J5 N/ Z3 {3 b1 `5 [
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:: Y: X" @( R( P& O+ M
#include <linux/module.h>
- I0 l8 o. P3 `( i$ ~* r6 F+ D' R1 Q( r2 A5 Z, r. \
#include <linux/kernel.h>
0 P# ^0 x( s/ C5 }8 f0 L9 X% s4 j! q
#include <linux/types.h>+ V: J1 B5 O) o" |6 U$ f! b
) K) c; r e+ {5 y. V
#include <linux/gpio.h>: f- h! R8 H% p& q' \% a9 j
8 U& c+ }& l1 E( c
#include <linux/leds.h>7 S! g" l- W7 S, H; Y+ X) H' c5 \
Q3 b( C& D% P5 k5 e, W% B5 I# d#include <linux/platform_device.h>. F6 k* T- ]! }# q. I& w
$ O; N' f8 u7 ]! q+ B5 X9 T3 {
" O3 J' A- z4 Z- y3 ^
( D0 E1 i" z7 Z# |: }- A#include <asm/mach-types.h>
9 c. L" A" Z. i3 b. P% U( q1 a
* Z3 K4 s! z2 M- R2 r) M: O#include <asm/mach/arch.h>
9 g% m8 P' K5 s8 A/ ~4 Y1 ?0 |5 K3 B$ K! C
#include <mach/da8xx.h>
( b! v" j# b4 J( f2 m
0 B$ `1 N* v3 k% h' J" W; F#include <mach/mux.h>/ V) C4 T3 w" J0 g/ I
1 d; E4 _8 k4 k: a# W- w& W
( [- v0 ]+ D9 W) f: W
) Q" ~) t/ b( |! z! w) @# R6 c#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)
/ Z# {) B. A( z9 M0 A: ]/ Q9 l' ]1 W6 P
#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
1 m0 J! O( o) l8 P3 B" g% t# P# b& C$ Z1 Q, U4 t) |- I, v
#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)& U" x* z& v; D+ e
% K9 z( h0 q0 \ Y
#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)( t4 O4 ?8 {9 f' T/ R$ W
+ m" H( Q+ W; s/ p0 U
#define DA850_USER_LED4 GPIO_TO_PIN(6,12)/ T+ f7 D' F, F' n- p* B: m
, c; \& \0 c3 u
#define DA850_USER_LED5 GPIO_TO_PIN(6,13)# i! x" V) q7 r V- Y( H
3 q; Y# m5 K* `7 \. S' z/ S E
; `& }' |+ K/ C% a+ z# l4 o
0 X: @4 g3 L: C7 t: ?0 x/* assign the tl som board LED-GPIOs*/
6 x" l+ G* F/ j) V2 J: i* X1 b& {2 T: f( E
static const short da850_evm_tl_user_led_pins[] = {
: f/ L: o: g) J) P; V
. T& x) ~, b# p5 P% q7 Q /* These pins are definition at <mach/mux.h> file */
5 c3 u0 H! T8 t& H- x. R* r$ g2 `0 l7 d9 Z2 R! |
DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,DA850_GPIO6_12,DA850_GPIO6_13,
/ J2 s$ o: S3 _ g' ?! k, d" m' h$ w6 L, c ~, a+ f* M
-1+ C* V& O! d* G) w1 Q w
2 Z2 ?8 b0 V6 r' K1 E/ Q};0 l! n- Q( @/ z2 M# _6 A
% U' y1 T3 j, Y$ U7 R' U1 R3 h3 Z0 }3 G( I; e7 J% |
8 D- ? J$ B2 {* bstatic struct gpio_led da850_evm_tl_leds[] = {
% R8 w. W. B) P% G/ b5 |+ @1 a: {. U+ n0 B
{5 r! g! w2 w# K8 p7 K
7 U" A! `& n& [, f7 B- D
.active_low = 0,1 d' Z# k F1 c/ g$ j" z" a* O# \0 h
2 s3 |: ~7 h4 f4 A .gpio = DA850_USER_LED0,
% {! l7 h4 n4 u3 S( S- ~+ Z. W# h& E
.name = "user_led0",
$ C1 C; u3 B Q. C% k1 U- L3 e# Z1 A6 ]% l; d3 n
.default_trigger = "default-on",( j+ [( b' O4 g$ S: w
& y% |5 X4 {$ G9 `
},
9 Q% K" |8 \) _, f9 `' b8 S3 x' z/ D2 y" j# D' b
{
8 ?% D7 O- X( w! [! L( I( S8 \6 E2 e- W3 ]1 T# @
.active_low = 0,
: a6 o, u( R1 t4 W6 a% i! f3 b' w$ j Z' b8 d7 W
.gpio = DA850_USER_LED1,
4 f1 q- X9 h/ a. Q' p4 q" p- s9 v: K, J$ t
.name = "user_led1",
% I' M( {+ I' X# R9 X* T* o" E8 X8 e
.default_trigger = "default-on",
4 h5 N8 i9 I6 {
! o8 j0 g$ X" ]* |1 S9 h$ C },% l- |1 C' U2 N4 ~ \' ?
; F9 @6 u4 l8 j i- \% [3 E- ^ {
# z0 e/ @" `2 r# f
+ I( O/ @- r+ n .active_low = 0,. B+ t l3 u: x0 X- l2 A7 u
7 _2 u) u9 d( N6 t* @$ w
.gpio = DA850_USER_LED2,' h! y0 l5 N. I/ E" H
5 \( M5 t" M$ ~. O+ M
.name = "user_led2", \0 u' s9 n9 o' L* f
: o8 P" N0 [) v8 _8 i# m
.default_trigger = "default-on",
8 k) B! j8 }& t5 d8 T: f! A; \! m
},
# }9 r) E* I& r9 _( r y4 j' C
. e. P3 E' h2 h) F/ w( q {. {* _2 q4 }: J0 f! E+ U) z# @* O L6 O
6 {3 z) F! i: s0 [ d1 k; T
.active_low = 0,9 Y9 [1 b k# r1 C4 |
$ m9 e) i% \4 Q% i& l1 y! N2 @
.gpio = DA850_USER_LED3,
[- Y' k- e% z6 }0 k( \+ Q) x( X' ]- i% J
.name = "user_led3",: b; I1 m/ v% }' E8 e L- Z
7 \) \6 {% u! V; @, s .default_trigger = "default-on",: ]/ b7 @5 L2 e6 A' s7 R% w9 n
& b2 [& D1 p6 Y2 L) k6 T0 X( e },
5 C! \0 [% g/ ?( C7 X, s6 k) B6 A2 S Y0 x7 ]6 _2 X. p
{" A1 u1 q1 O: m0 N
! _( z( ^; D" s .active_low = 0,' C) S3 q' H$ j+ P5 h
/ W8 l: @3 y3 @+ U2 x9 p ]+ \ P
.gpio = DA850_USER_LED4,- m- M: N8 z8 O. N" v5 [* ]' u1 Z
' S8 y6 O( f* A0 ^$ D% J' E1 Y! J
.name = "user_led4",
6 z- r7 L/ B$ \2 K5 x7 L' x% T! Y3 A) t9 i3 f8 z9 C
.default_trigger = "default-on",1 W! ~5 v" f# W+ \9 I$ h5 K
$ B; U7 ^$ H+ Q) E0 C }," k+ I6 [. Q; P: A+ f& g
9 O" `5 k6 C6 t! t {
h- \" @5 y/ w3 S- ~8 a9 h! ~, Q5 ]% t& m6 ~( G
.active_low = 0,
! w' e" P, h1 |2 ?# N) ]5 ~: o
& X, A- ?: t3 M/ p3 ~1 e2 B& C .gpio = DA850_USER_LED5," W* c% ?) J2 x1 ?
; ^5 E# W; ~( h/ A .name = "user_led5",
) v G+ f- s6 y* Q; |. E) O. Z& m5 m- M0 d
.default_trigger = "default-on",9 r" V2 ]# ~ |7 F3 l5 G9 L
; n2 y& y* Q" y },
4 Y8 r y3 r$ g9 t6 Q8 w- z& v/ F1 G& {% v6 H: Q+ f* G
};
4 F. y* n% k3 ~$ D I
! \+ k0 z- o! l' k0 a. t) L- s1 | K/ g" {% R# q1 a% H5 t
. g: V1 R2 G$ w2 C. A( U8 ~static struct gpio_led_platform_data da850_evm_tl_leds_pdata = {1 d; o* o& k& }( N* H4 I' O
; o! I# t+ J/ g. s5 E+ \. W
.leds = da850_evm_tl_leds,: v4 X6 X/ [4 f8 |7 P8 W
, B2 c* [- {; M2 ^9 P .num_leds = ARRAY_SIZE(da850_evm_tl_leds),# F; x, ~6 u7 ] a) w5 c
4 w" _3 K# x2 |# T! n" J
};
3 k. ?) @8 g2 N4 j9 ]2 L: ]! P: I( v2 M& r. w+ z0 Z# q
. w H6 y& i$ F1 g4 w. S' }! q0 o/ `" M+ H% s
static void led_dev_release(struct device *dev)
# R9 C3 [: C8 L* J( I! T
( p+ ]8 y, X8 A2 \# Y+ f* z) y{! O2 j! w$ b( a! C3 t8 g
# j a, f" N) W; K: i};
; ^3 k1 j8 S5 K7 W8 T/ Z4 p9 S# N" ]; R4 ]) D( ~+ X8 i. ~
- U' |( d# z3 p/ R
+ K2 e1 W; c s( m6 M5 O4 pstatic struct platform_device da850_evm_tl_leds_device = {0 N& G& N/ o! L9 Q) i
! z: U! e- X( h, S .name = "leds-gpio",) k% n5 e) b% K6 x6 {
* j) Y2 _; g* I$ C$ i9 l* a
.id = 1,
" e, e9 ~' c( U3 p1 w8 @' {0 g+ d, G! A
.dev = {& X1 o: |" X, S$ R3 n5 F4 Z
1 F% p; U4 N& l: C& `% ^; i# Q .platform_data = &da850_evm_tl_leds_pdata,% o3 p& U" i3 | b% e
" ^, d' \9 l6 J .release = led_dev_release,! R5 V8 l1 C( g: V
/ `/ p* y. O, o0 ]* m }- K2 {7 N+ u+ F4 |$ X
0 T, E0 w/ l1 A. Q+ x% V* ^# B};6 G0 _$ A' T2 c; v/ M
3 C: c1 t! ^: b3 i
' h- }+ }! `8 Q* h! `
+ K2 z( f# B ostatic int __init led_platform_init(void), | s% ?' B% {; b6 D: y9 i
1 J: W+ t, I1 w1 q9 a1 _& h6 i{
0 z/ I i3 Q, r- m( r
) }2 P: {/ C; P5 N int ret;6 f1 I+ t g# P. K) M& N0 m* u
5 a" E% f4 ~0 Q3 A- ~#if 0! m) p+ X0 C. U, Q; a! J: g
+ P: [+ {* v2 }2 x: K7 ]" R
ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);+ e g9 z5 g5 ^7 r. S- O
1 e! q- n/ E U9 F0 \" x if (ret)* D5 Y2 s& b: V
R4 ^& j; Z5 v, j/ { pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
5 J% y( Y/ l: }" v1 ~
: B3 n1 g4 \0 [ }" ?- k "%d\n", ret);# a9 U7 @/ [" ~" S. H- P; `1 T: f
6 @/ w. s' T4 e' p
#endif
+ A0 V0 E( I H! J; a+ A, w0 n- i: h7 A8 v9 [
ret = platform_device_register(&da850_evm_tl_leds_device);# f# u) l) C8 ?: H$ `# c4 D' o
, h6 F1 N4 o3 N" l6 v; v
if (ret)
* w4 c4 ]$ J. Y& l# |; h8 l
" Q* v. Q, b9 ~9 ?9 K( m0 @- ~% t3 F pr_warning("Could not register som GPIO expander LEDS");
5 V+ I* z; l4 D/ z( }& k. @
, y/ i/ I; y8 R- g else
( ?. k& V9 w/ ?0 Z
- a7 X; {; Z4 l+ f2 {6 }5 j" i printk(KERN_INFO "LED register sucessful!\n");+ H4 t I0 \- c
0 J- t1 p6 ^. V0 Y- d/ F8 n( F! E+ m3 T6 l# J
- N- P: g" e3 }7 }' g7 }& \
return ret;$ s7 y ~/ E l& a" G$ K
' k5 s2 a. c9 l) R! c- M: P+ Y* `}
! b3 q6 y) i9 m, d% [/ i" g: P! l) I) A: [8 w
2 g9 a6 W" }# \
+ ?; g+ ~4 z5 {: M5 A5 D% Sstatic void __exit led_platform_exit(void); L P. p$ x# W* K# f1 o r
4 n: T0 s" D2 q5 T
{
8 R$ r, j" t% V( I) t% S
+ c2 J& T: `6 f, H6 p platform_device_unregister(&da850_evm_tl_leds_device);, j/ e) F' {8 g/ }. n# u; }, _
; P, e' x# Q' Z2 W, M
* ~6 T2 q( B, m6 q
* g: o2 Y$ c l
printk(KERN_INFO "LED unregister!\n");
2 ?8 d" q+ W9 H2 u# y( W n6 d' `; q0 i4 g4 ]5 I
}- D( R8 ?$ I8 O3 a5 ?- c
o) l% y8 a) M) q' q
/ O( r/ }- U! e& P$ C
4 G# v/ |. p/ L/ e
module_init(led_platform_init);
. @7 {( [8 M* o$ D: r9 l V
* d( X' g2 ~# g% I1 D' E& xmodule_exit(led_platform_exit);, Z' ^; a7 E9 B1 ]# s% g
# s* o/ S4 u2 H7 R# _
2 T/ T: a+ K9 y5 a" b2 u, H0 C# _& W0 l4 D# B
MODULE_DESCRIPTION("Led platform driver");+ r& v8 l& L0 Q, V
$ W b6 c+ y0 A4 L* F. eMODULE_AUTHOR("Tronlong");
) _9 W9 q( X' w) x8 Q, f
% o/ I/ n; Z7 w) F TMODULE_LICENSE("GPL"); |
|