|
板凳
楼主 |
发表于 2018-12-14 17:29:27
|
只看该作者
' \/ d5 [! i, k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:
7 k M: F+ O' f# ^' g7 W8 t+ w#include <linux/module.h>& y8 P3 \4 L' T4 z- _/ X
& n) I3 b$ R* Q1 T g! y
#include <linux/kernel.h>3 u J( F( T4 c$ J8 Q
" _0 E* C2 H) `5 C
#include <linux/types.h>
$ j J$ w+ |9 o: s5 I) U5 L( d( f1 w4 y# H0 V- k
#include <linux/gpio.h>* y9 z/ R# v$ c- l* p: |2 R
0 K7 U' J6 U c
#include <linux/leds.h>
% E9 {4 a- A6 i% f) d
3 ^/ }1 P- V' G* I( \#include <linux/platform_device.h>4 P) o& v# e, B5 _1 [+ N! {3 G: ~
! `- d* L: c0 `# J- Q
8 @3 M5 ~5 K/ D" t) r
. p! }- F# K( e. _. d
#include <asm/mach-types.h>
$ h' i& e. F: T/ _3 N: s% c
A( x8 c% K! g' S5 s8 X6 M#include <asm/mach/arch.h>
7 V' X5 _- K V6 I6 [+ V4 d. ~3 i, U1 _. T$ l
#include <mach/da8xx.h>
3 V% T7 M7 W$ t( _; d' r
( I, p" m( Z! e1 L. O: i }#include <mach/mux.h>
4 p8 @; J; H' z" X$ D% |
. M1 Q1 ?, S. U( n+ a# B
8 p- ?2 m$ s2 K2 {! `- `% C3 W1 q9 X) L _0 E7 c
#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)
5 U+ z9 R8 \0 J- ^4 ?: U. U
* H6 I* W, }- o8 _3 k' \5 m. a#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
! ^5 s; ?: t$ k7 U
' s& |% s) B' B( l6 p#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)
+ H5 o) C1 r, l# j) j. y8 o/ q! F$ K$ N7 U G! Q
#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)
- Z) j3 W% x8 }4 o/ }3 M6 m+ X. z, K
#define DA850_USER_LED4 GPIO_TO_PIN(6,12)
% C5 q4 e+ n/ y4 L8 f! k6 G1 `! ^- x! g+ Q! N" ?
#define DA850_USER_LED5 GPIO_TO_PIN(6,13)* k2 B% n* Y [, u
9 ~' o- s9 j, T4 c7 P( x
( m* T# a% _8 E; ]$ {3 {: i' X8 M* W& w' |/ N) ?
/* assign the tl som board LED-GPIOs*/ ?) r0 i7 _( U
& E/ v! R7 P0 M3 w( t+ B
static const short da850_evm_tl_user_led_pins[] = {
# I3 ]* n! J( i2 Y Z# y* n3 n" B- U9 v" j6 b+ u
/* These pins are definition at <mach/mux.h> file */
7 X; k5 b9 ~. `: q; s" r
9 q- n' M/ K- [0 g) e) E DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,DA850_GPIO6_12,DA850_GPIO6_13,
! I6 i% {+ u6 R3 m" o6 r: j. }
3 }; S+ ^' m, N0 F: f5 ~- k' M4 G -1
; R0 y6 ]6 Z; b6 q4 P8 _- {, x9 u3 E+ V( t" o6 z1 G
};- C1 l7 W# h4 b! m7 L# p" F2 z
- B" C* N! B3 Z' A4 K6 F/ k" ]# @- C# }7 y8 H( S
: R8 [# G- r2 A8 P( t: U0 z9 f
static struct gpio_led da850_evm_tl_leds[] = {
. ]% {1 X% M+ u
& } E0 o% u- X6 l t( p {
& K, S1 U; S, q% }6 f: [7 T% e' c, C8 a" R! i" N
.active_low = 0, b) K" X. M" j, ^' N& m& n8 _' t
8 b! u# ]5 n% L" p6 u3 X! k$ ^* T7 e .gpio = DA850_USER_LED0,7 Z, ^4 Q5 p: [0 S X `: t
% ^, ?6 [5 E1 R6 C" u: k6 P
.name = "user_led0",
1 Z: u; `1 l; C; k% Z
$ e; O2 G6 g) S; a4 ?. S .default_trigger = "default-on"," s8 m& R+ h' }7 t
5 F6 H/ ~! F+ i' `; ?( S },
9 U0 w8 d8 H' q0 y$ e7 |" E' U4 p$ e- d" _
{
- | K9 j; s |- n/ [; P4 b& ]( j5 u/ k" j
.active_low = 0,
9 A6 O/ V! i: y9 M# R! A% x5 Z) {/ y( @; k( ?
.gpio = DA850_USER_LED1,# v c( k8 @* C* q. T; t
, ]- j9 Q* _5 }# t C- k0 y .name = "user_led1",2 _! b' n$ G5 k
& S7 G. o; }, X9 J% V2 g .default_trigger = "default-on",
9 V/ l' U3 x0 h5 t4 b* E% O' I5 k) o
},
7 M# u& R+ F% x3 Q2 n
' V4 u% A, r+ N3 j4 ? {
9 U4 C+ ^6 X% D4 X7 Y! ~- t, M" B& E1 w9 k+ z+ Y, H) S0 P$ i
.active_low = 0,
$ A7 Z% n) F# k2 b. |7 w" A2 z$ D a& }' r( r! U
.gpio = DA850_USER_LED2,! G2 v5 j% A. j0 u+ l" ^
7 m% S. [- {9 `) M w" M# L .name = "user_led2",
2 l9 a8 w: U3 j% }+ \* `6 l9 K" U* M. e+ V$ _% p' S
.default_trigger = "default-on",
8 \8 H* q; i" N/ J( f! w3 x1 R* C
9 u6 q& n l* c1 d: i, X },3 m% L6 N, d' x+ @
) a* k$ z9 o* _. D1 H {
% q4 k! w9 c- W: f; s, |8 c9 }
' h" f7 \+ M0 ]! M- X6 a$ S# E .active_low = 0,9 A. w6 v; H% L( k) `0 b% c
+ k6 a7 G4 ]# z6 Y1 e .gpio = DA850_USER_LED3,
5 ?! P/ t O; J
" ^9 C& ^$ p t6 ], F. v- A% ] .name = "user_led3",8 X, j% n) P: X6 n8 P+ C- S* d- f
& W' m; R! f6 s9 m; }
.default_trigger = "default-on",4 R. H9 C( r" u! K" P
) b; L4 Z1 v0 \5 j# J0 ?, W
},
! r$ q- `6 R" f$ @1 g- j5 B' i9 G: U' g) g
{
: V: x& r; O# S6 q9 Y' ^( A+ x. ^& U# ^6 Y( C( c3 q3 o
.active_low = 0,* Q8 V& t8 P) Y4 y/ ^- t; @
+ ]" k# E3 H1 ?& N& ?
.gpio = DA850_USER_LED4,% x9 e: H- Q! r
+ T; X5 C5 g+ q' o( U: y# Y .name = "user_led4",5 D9 h" e( f" C
5 ^# m: @+ |( Q" _ .default_trigger = "default-on", m- F0 V! @6 Y1 ?3 e
* A/ n/ K+ F" d( P2 a
},6 n! \# k) H: o
1 a7 c5 r2 H3 }5 z {" O6 @, }! Q8 |, S* E5 x
# i, |. Q4 R& C .active_low = 0,
% B2 R& b( B9 M% \
6 j8 n0 E a9 ]1 c/ O4 X8 } .gpio = DA850_USER_LED5,& z8 O1 ^# e- v# R& N/ R% s
: j2 @* H9 G _: ~, H
.name = "user_led5",
! L* J0 _( e' [2 }. r+ o$ O1 R, [2 w" i; w- r5 \
.default_trigger = "default-on",- b1 q3 Q3 v, z
+ z( n& S9 B+ Y! b& M
},
. g6 Q- O+ G, g( V5 j: C; C
2 e4 r2 g8 g+ |! W};
& a4 s& w2 P# m9 x3 y
1 u! I; i0 h4 [# o2 c. {$ ]5 w8 i r7 M' W2 }' n' `
, u @6 J( I' j& Q/ c7 e. D# j
static struct gpio_led_platform_data da850_evm_tl_leds_pdata = {
7 b b7 w9 Q- Y; F7 X# Y7 Q# N" e6 y" k
.leds = da850_evm_tl_leds,
+ |( j& r% M( y, h4 t$ t; @7 I& \! V/ P
.num_leds = ARRAY_SIZE(da850_evm_tl_leds),
( l' c+ Y, d# v- a/ y2 }2 W4 f
: a- e7 }: l9 e# K: R+ n};
+ \2 Y: }1 a) O' k
9 e1 y; y7 k. G6 U
& l0 y8 ?3 Z0 b6 p) a l5 w; [
, I- S! T) b! x1 J1 j, wstatic void led_dev_release(struct device *dev)
; k/ Z: f3 J6 N/ U4 l
- i4 k8 `5 Q6 d/ f2 Q; e7 U{7 E( ~" ?! }! k" V6 e- q/ q
, x5 u* V9 U: q4 R) b% O};& z$ Z* Z6 J) `. ^/ j" K$ H1 \
& D* k6 {' w9 n" j
* o6 e: V9 b( {( g- z% `; u* Y, Y2 z$ z' l
static struct platform_device da850_evm_tl_leds_device = {! n0 H0 A& S; I. O) `. G
! m2 t) n% K4 a8 Q# S .name = "leds-gpio",2 K. B2 T. Z9 z" I9 M( i7 _$ c
% V4 X/ L& Y% u+ q4 k: B
.id = 1,
3 t; c" `" @+ O, |
' T) ?6 X2 Y0 S .dev = {6 Q3 S. b! ^* O, |, s9 h
. J9 f8 g6 u' Y
.platform_data = &da850_evm_tl_leds_pdata,- H9 c& h0 z: m$ x
' G q8 a, R9 T9 m3 E
.release = led_dev_release,& [& `0 j# _ N9 q
! a- q8 b& s0 c }0 l- H4 G; F1 t# h s8 a
" C% \8 B, ~4 O* L& r};* A! j: \! t7 I5 s) k2 F, v+ j
$ T, \0 T5 t+ f3 b; J
! M& t* C% m& F
2 d$ q5 V& K/ b7 C( R6 ?) mstatic int __init led_platform_init(void)$ k' e" [9 B' F2 P( D! V! P/ X/ t
" W/ z! t2 w1 j- Z
{
# V1 A' G1 t2 e4 r/ f$ v4 ]8 l2 y' J# \* Y* o2 _3 w# O5 T
int ret;8 h2 W X5 U; T! Z. Q
; I6 H' ~! H7 }" H2 e7 d#if 02 N" M3 ~9 s2 Y- {
' ]9 F7 i2 C; d( a. G ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);+ l; i" F+ R( C9 Z. N
& U5 z. m# U, P2 x9 |9 C& @ if (ret)
$ J2 ` l0 T9 L: O' L! C% T l
E7 W( f/ J* R: N, k pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
" J J. R' P7 I6 B
4 h2 ^/ [: R6 _ "%d\n", ret);* |& L- C+ A- H, H; b- w2 L8 T
! X! q3 Z3 l R6 x! V j! s( _9 T
#endif/ }) I9 Z9 f+ l! }( b% k
6 S* r3 H3 g4 C0 w+ r ret = platform_device_register(&da850_evm_tl_leds_device);1 p4 y, |- n4 S/ b$ y" X2 G
2 _$ _- H* U3 u6 b- q if (ret)% Y- b" S# ]0 ]& Q @4 y/ r
8 x1 u5 a: X( h+ h8 p4 y: |% M pr_warning("Could not register som GPIO expander LEDS");
9 [( n4 A! r8 o0 k5 p6 P" j) k# _# Q) p% T. P& v1 r3 k
else
$ w7 z4 V; N: w+ k. s
' r% b/ W) U& |1 V6 D {* i# L printk(KERN_INFO "LED register sucessful!\n");
4 a1 |- [( \) B6 r- @' y
# L U, A6 n+ J+ |0 ?5 M( ` g$ R8 c4 `
: M8 o8 _) o2 P5 y: K- J
return ret;
6 }3 C0 P+ L& F2 M( B% N
0 T% z3 Z! S" }6 n. V, t$ Z# T}
2 i' T$ B% T; U/ J$ S8 J2 ^7 ~- a. O! }) x" Y) z
1 C$ A- G8 {/ X! L& M6 [/ B# N2 S
8 j, j; Y$ t% @ J$ lstatic void __exit led_platform_exit(void)$ b' k7 f, _3 O9 @ E6 p% K
4 E6 Q: Y" ]7 p7 C+ ~
{
$ k* q2 n) W2 f. |$ H# i5 [8 J
" I/ A! P* ?5 X( Y4 X9 q4 W9 s platform_device_unregister(&da850_evm_tl_leds_device);
6 D* d; u! |. j. M$ h+ s N
( i: `2 z" o# f& b& K! _6 D6 C6 u6 w, D
4 D3 x" C. }' ]# _6 k printk(KERN_INFO "LED unregister!\n");5 `0 D! k9 g9 i% [1 b7 G9 E# k
7 J2 Q# F8 X3 D/ t' Z
}" M8 v' ?. _8 F. l) E7 s8 T
. H1 ]0 z/ a9 T! A B3 w
! B, I: L: J% a% j5 K
3 f2 V* @$ A2 X. x' U2 {module_init(led_platform_init);9 a3 ^/ i& D, {9 _1 J9 G' y/ G
5 b, `6 [* }% r, R9 b$ s* B
module_exit(led_platform_exit);
$ b% X, b" h' {$ T$ {# g
( B/ B. A% A$ c4 ~& H) z' c
* P& L" O- B, P5 K) Z- c& s' R9 r6 w9 [
MODULE_DESCRIPTION("Led platform driver");
( d. J2 Z1 d- n$ x! x4 V7 Y6 ~* u! p* f# k7 B
MODULE_AUTHOR("Tronlong");( B. Q* [4 [5 i1 s& k- j) x
4 x4 X9 G6 S# o) y! FMODULE_LICENSE("GPL"); |
|