|
板凳
楼主 |
发表于 2018-12-14 17:29:27
|
只看该作者
9 i1 [7 x1 f& u; n5 x4 q
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:
8 P2 ^ N) |' f9 [#include <linux/module.h>0 C8 d9 ~: I3 H' B& T2 c: }
% y; f8 e% L4 c7 k2 L2 |#include <linux/kernel.h>* E# c' N$ A. h" ` v: k
6 i; N" g6 s+ T( F
#include <linux/types.h>* L, N. ?& | v2 ?2 w7 |1 m
) U1 a$ D$ B9 a: o# ^8 b( S6 u#include <linux/gpio.h>
9 g$ E: L* i* U6 D |8 O( |6 q9 e) C' k7 B0 o
#include <linux/leds.h>
8 f6 S8 e, v1 ?% e8 x* R
. v6 b' W' C% s& r9 @6 j#include <linux/platform_device.h>5 K. h! w$ ?/ R# r; T' x" }3 c- ~
q- X% y/ Y; o K! v/ s7 e4 e- i' O* [8 y
* R& {: N& O, l( c1 }: t! a _#include <asm/mach-types.h>) H+ j. o, v" M; r& r" @
$ T. }* u5 F2 T" E#include <asm/mach/arch.h>
" p9 _# T! W3 T( B5 L+ K8 O9 h9 [ f5 ^. [# U/ [' _
#include <mach/da8xx.h>; W) a3 c- l. f) X! Z
' O- p6 l4 E6 F! k. C! p; b- f$ @" @
#include <mach/mux.h>0 L8 S0 Q& x. O. ?
8 N1 f! _5 B2 L
% v; r6 s2 c$ k" w$ L0 z
0 o7 c O3 N6 e3 k8 p#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)$ x( C y% k7 z9 O5 a
7 b3 { R! O! `#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)0 z& W# v z/ o) S' k3 \( x
4 k& W- o/ T+ ]8 b3 [#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)
; g# w5 a/ r. U3 H& e, }# t! o) U1 j& ?
#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)6 ]. f, ^: E- Z# l3 R( p8 b1 `
8 M6 S' ~# H, K5 Y+ Z#define DA850_USER_LED4 GPIO_TO_PIN(6,12), F( C4 @ z- \( |* [- W
" B3 U4 N5 N, A( L: w
#define DA850_USER_LED5 GPIO_TO_PIN(6,13)
}- E% [9 s0 f! d' \
& r' m, L- q- n% S9 B7 d. U& a2 C7 B' X
: W" Q4 x5 ?( M& k/* assign the tl som board LED-GPIOs*/5 i) ^- o# b9 P9 [- V$ r
o# M4 L: j3 s" C E0 W1 C- C7 k2 R
static const short da850_evm_tl_user_led_pins[] = {$ a& W! ?" O' p; x5 w, Y
, Z- [& }# m& n- a. ^. y, U% x1 ~: e2 O /* These pins are definition at <mach/mux.h> file */* D9 A4 q) f# N6 j1 `, k
2 A' S) h5 u9 j& O, j8 q
DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,DA850_GPIO6_12,DA850_GPIO6_13,3 h( K0 [$ r! T4 q3 f
& M! v+ C4 H0 O" B0 o1 y -1
6 j6 a# e$ b8 \: n* l* @
. O, m- |% y( \: k9 S" F};3 O# u" o/ `% @( S
7 R4 D# E4 q) z8 O+ U1 \, i
( S5 x9 D$ m" `, V3 W8 |
" d7 f) _) e4 a8 E. t4 V! |% { e' cstatic struct gpio_led da850_evm_tl_leds[] = {6 r. w6 A+ K) ]5 A2 q
% S, U; i$ ^3 Q( t$ v
{6 l% `* z$ p! O0 g
/ Z5 r2 R* N5 r6 n. ^ .active_low = 0,0 W- d. b+ N5 O/ `
. Y1 }" u3 @ P" x
.gpio = DA850_USER_LED0,
7 O" e- Y u3 i/ P- X. |5 w I
2 T3 t: q+ C4 n; U& T .name = "user_led0",
\/ G! U* k1 [, M y
" d) K8 O% h% o* q# n# p# v9 Z .default_trigger = "default-on",: }5 e9 [' N+ k( m# p) Q% e
' M* b; B, n# B2 q( l: z& L1 k
},! ^6 S: X* c6 p C3 s# l, O
& m4 D; J3 b8 ?& X9 I
{5 s! `7 ^4 H u4 A* r g2 x
# \# a# B! A+ e7 o8 B
.active_low = 0,
( b, T6 p3 O6 L, V8 D0 h7 X
! I/ j7 I/ p6 t. I .gpio = DA850_USER_LED1,% U3 f; O L3 c1 {2 h1 l0 e
8 b+ m5 d& O# q( h+ K+ r .name = "user_led1",
7 o% i8 {9 Z$ Z- P
, o1 i2 i0 q, }0 v1 z7 | .default_trigger = "default-on",+ i, w5 Z2 W) `' U/ g) K
' R% j% @! n. i: a5 B2 L* u. l% @/ I },
( m1 o3 V F0 r0 ?" X
* Q: S9 R" q3 |7 e f! ?4 z6 p {* x- h+ ?% F( i% L: j/ f7 Q
- g ]9 n1 D$ M2 S2 o3 u: ^+ l' V .active_low = 0,
" P, x$ }7 w: o' z
+ h1 N) r' J Y$ H5 n8 _ .gpio = DA850_USER_LED2,1 j+ o& W! u! V* t
4 D5 h4 m5 ^% \, M- F6 d- Y$ I .name = "user_led2",
3 N/ E& n" U/ u! \2 f4 X |9 x) {0 r, \" S
.default_trigger = "default-on",, m5 k! |8 m6 s- p) d- T
; Z# n; ?0 ~/ N },; m1 }( x& G2 u$ e8 I
$ P: s! w, K2 N7 r. I; V$ J
{
- M. }+ L5 H/ P* z
. c- ^3 R/ Q: _3 T: t: u .active_low = 0,
5 R: }; Q7 ?# f& V8 R. k/ u6 C. I9 I; ~
.gpio = DA850_USER_LED3,
6 ^- a* z) C& p2 D1 A
( ^) k% ^7 y9 ^ .name = "user_led3",
" b+ o! ^' P% E& ^" E' U
9 S! ] F( K$ p' X .default_trigger = "default-on",
& q9 Z' W& d! q* D$ H
% B$ L+ I) [( o& ^: V },: W3 L8 i4 ] j& U ]* [
* w, W5 {7 z* O' q5 t. z! l {& [; ?0 J4 f* R) Q" F; Q8 e
6 P* \; q* e, F: ^. e [" [ .active_low = 0,$ n! n; R, M! ~4 f
; B! A; F9 L3 O5 S4 W .gpio = DA850_USER_LED4,
& Y! V, _4 s' X8 h5 e4 g: Q/ {- N8 w& j& z' |/ W
.name = "user_led4",1 c3 N2 [1 a* }- Z
9 b2 B1 m2 S9 V0 u3 u6 R .default_trigger = "default-on",. X( y n7 Z3 C: L( c6 _! z
. \9 G% R% K! J8 }. }0 S
},
4 c% K9 |1 b/ h3 C& {
$ M8 G( s* y/ K {
$ ~4 [+ m; b- D# S* p, N& f# V2 D* A, A
.active_low = 0,
; ^ m1 r, h: ?( ]3 _/ V0 E7 q
3 V9 z$ m# H6 }- N# A5 Q+ D1 L" } .gpio = DA850_USER_LED5,& \: f0 B7 s5 h( l0 { r
+ v) _1 j: q* B' C .name = "user_led5",
- J) D9 [! t! {9 @6 u0 l& U' x, ?# R4 h3 C9 `1 y' ]" N
.default_trigger = "default-on",2 t' v: Q1 ]" J' U# v9 }8 m
8 H/ K( G6 O" ~ \0 a- a },
8 k) T6 J0 A$ t/ b9 H# \, m' M, r0 g3 _/ @
};
! a# ^4 W) i8 y) v' I; j& r ^8 p
& U$ |2 R. d+ y# R3 i1 Q9 R o6 F1 z* t
( V. O* b9 u/ ~; ~) D
static struct gpio_led_platform_data da850_evm_tl_leds_pdata = {* {$ g; p$ v3 P( j( I$ P3 h3 H0 t
* p' ]8 W! t9 Z" m* \9 _, m
.leds = da850_evm_tl_leds,6 h: j' O1 x+ @
6 V' y9 q8 i% X7 z) q4 I
.num_leds = ARRAY_SIZE(da850_evm_tl_leds),
T$ f: V2 ]# N3 Y7 k5 W0 |0 H. T
9 h* r5 f" l/ H: o};7 b5 l5 ^. |# r0 u% k. Z+ H7 i2 X
" Z' `. e% `$ }
w/ S( V& x* @4 V5 W: }7 P: j0 c6 w5 q3 N% ~0 }8 H0 W$ l7 r
static void led_dev_release(struct device *dev). a0 i6 Q8 o. k: V6 _7 V# `9 g
# z9 T. o5 u: N3 x6 U{) ^9 ?, q3 p3 g' z% `. @' Q4 M$ F
8 ]% h7 n9 {: x% X5 e1 k
};
. w. q) t7 f2 B4 m7 b- i0 b' |# U8 `. B: j" G6 ]
0 z& N" n" d0 a6 q* v& b# L0 F" I* N" @) d3 \
static struct platform_device da850_evm_tl_leds_device = {# G y( E# w3 N1 ? ^
) R6 u8 n5 R* j1 B! a
.name = "leds-gpio",
5 I( E$ s: K, N0 F! y
- \$ V: G! P9 u* h9 h .id = 1,! n) t2 y& ^, s/ {# }& s
' z5 J! t2 V. G, U- h/ |/ h .dev = {
5 P' ?/ G. D) P8 o1 A9 n2 D J: a& S+ M
.platform_data = &da850_evm_tl_leds_pdata,
. }4 Y0 k; P0 {9 a5 A6 q- T. O
! M! N6 V% r' @, _ .release = led_dev_release,! l8 U% J, u) @$ _3 s, O
f3 u1 M a ~$ ]! z! K* `
}) e, R/ Z: X- j7 g2 h" b+ e
6 L* a+ o5 I& A( ] L};& m4 p/ G& A0 [" e K9 L
3 H1 I! d& [2 t. T+ |
: E9 a% }3 F& J' u" I) Z% j3 F, C5 j
static int __init led_platform_init(void)
& F3 A; ~- ]( ?3 C5 T& g9 H7 M* r2 x1 w' V
{% t& G2 p$ T0 L1 I4 F
2 g& p; l+ L. y' H int ret;
, z2 y0 A% m n- C# }" p% q' A% M1 M8 f% r' _3 |
#if 0- Y3 {1 H8 A8 K; Q! S3 S$ J O
6 T4 z( o5 X4 e" }1 Y$ M
ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
' L8 W& L( }7 J6 r3 o" ^ T5 g0 D
if (ret)
/ o( Y% B# ` j: g9 X4 K" C, d# {6 q& ^8 H9 }+ J8 g4 e
pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
; t% \! ~, Z2 x: J8 W* d
* |$ v3 q- p) N6 x9 C "%d\n", ret);
0 g1 l& |! r. x V0 O1 V3 U) d2 }% L
#endif
, q, x8 e, d& u1 q1 K& z& S( z. [3 E$ g- h3 c, X8 I2 |
ret = platform_device_register(&da850_evm_tl_leds_device);3 E7 P; }8 S) s
2 f8 _- v6 b" e; `. X2 ~' R
if (ret)8 A6 q Z1 E# A7 v$ n- d3 X+ `1 u& G
4 \1 }+ K- j# f9 l! n
pr_warning("Could not register som GPIO expander LEDS");
; d) S7 {1 [$ v4 ~ S2 K' d- a0 q% }3 R4 k# v
else
+ T" L5 W, O7 ] C0 X, o4 N/ j( P0 W
printk(KERN_INFO "LED register sucessful!\n");
: {+ S6 C) Y9 B( w7 h+ s, }+ ~ c( U; A
$ N3 A: }( l$ q5 r
' l/ k0 d7 Y: U) N+ y return ret;
0 [/ o) g ~* U& H- N
; P$ e4 X7 U) `& e* Q4 M7 v( i! Q( \}" A( G: _! M( S( q6 c& X
% V( f5 U; l9 o6 _' A( h. t& y: T
" _. @/ l3 r6 f1 X6 c0 N5 ~; H8 O- @) A: z' u% N) i2 n8 {
static void __exit led_platform_exit(void)
. f9 K2 P( \6 n7 b. K! t1 d2 I' j7 S8 b4 Q! i' ], K7 B
{
. g9 Y; a# P' f1 V4 n( @9 k
& F2 y" l2 a. _ R$ b3 [ platform_device_unregister(&da850_evm_tl_leds_device);/ u0 d) K( j! `3 i
- M- R$ |& n. [# C9 n( c0 g! o( S
) u( p) k8 e: R9 ^% A! F# _9 f4 _! H- u8 _
printk(KERN_INFO "LED unregister!\n");1 i$ a* c9 g. r# T2 C) C
) F. W3 O2 Y) A3 W* \6 \+ W' a
}
+ [% e" s' e L, s% Q( X- Y% G8 Q |. U6 z; q2 z
, t1 e- ]* H6 {' M" j' R$ @4 P9 p) x5 T7 A D. n* Q3 Y, x
module_init(led_platform_init);0 N) d/ E* y$ {' @8 ?
8 _6 U- U( Y7 W9 K
module_exit(led_platform_exit);4 c! P- H3 T- j ?: }1 g* \
6 {* i5 o0 R* l+ s
0 t' f7 H0 m! P. K2 `+ R3 r5 v' a: ^
MODULE_DESCRIPTION("Led platform driver");
+ e: p7 ~" b8 Q" s) Q# @ I3 C' l# J @" l4 u0 E/ ^! p+ D! j+ C: f
MODULE_AUTHOR("Tronlong");
1 k4 y+ _% Y u( F1 V; }' O( H
) c2 X6 Z, M1 ]/ s- R5 g: {$ H0 ?MODULE_LICENSE("GPL"); |
|