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板凳

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发表于 2018-12-14 17:29:27
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6 H: P1 v2 a; S; V, B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:) X5 T( ~# G! q- o
#include <linux/module.h>
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+ i, @6 N; b8 C#include <linux/kernel.h>" A7 B: h. U$ Y( ^! M" X
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#include <linux/types.h>
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0 t- h3 I- k. j. W# Z3 u8 r#include <linux/gpio.h>
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. L/ r$ @) X- [8 v9 [#include <linux/leds.h>. F& ]- }; a9 U3 D! M# A
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#include <linux/platform_device.h>- S: C8 K5 O! h" F0 Q0 `' a
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#include <asm/mach-types.h>/ ?; w& J+ [ ~5 R. N P* Z( S
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#include <asm/mach/arch.h>" f2 A0 O6 ^& Z$ }: h* x# h
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#include <mach/da8xx.h># B! q* V) v, y& A+ ^* ^/ `
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#include <mach/mux.h>
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' s' b/ G7 _! `#define DA850_USER_LED0 GPIO_TO_PIN(0, 0)
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#define DA850_USER_LED1 GPIO_TO_PIN(0, 5)
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* k* C |' p0 ^#define DA850_USER_LED2 GPIO_TO_PIN(0, 1)8 v2 r) X) E, {& ^
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#define DA850_USER_LED3 GPIO_TO_PIN(0, 2)
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2 B& t5 n% O% a8 z% U#define DA850_USER_LED4 GPIO_TO_PIN(6,12)
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6 [2 P/ s* {: W2 c& t+ O#define DA850_USER_LED5 GPIO_TO_PIN(6,13)- n3 V& f$ @2 T0 v e! g( e
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N$ X0 M: }3 \# k$ y' M/* assign the tl som board LED-GPIOs*/
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/ k( |6 Q! Q7 P# V U6 x' zstatic const short da850_evm_tl_user_led_pins[] = {
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3 [7 @9 u4 }6 N1 O: a /* These pins are definition at <mach/mux.h> file */* l7 i, g+ k& t, W; B6 ?+ g
! m' V8 B$ _/ h9 M$ r DA850_GPIO0_0, DA850_GPIO0_1, DA850_GPIO0_2, DA850_GPIO0_5,DA850_GPIO6_12,DA850_GPIO6_13,# M+ {2 G# e; R
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};
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static struct gpio_led da850_evm_tl_leds[] = {5 F1 K7 O% N; V
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' k: A" p( U) R: B$ Q. H+ i3 U .active_low = 0,
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.gpio = DA850_USER_LED0, Q3 y& Y Y' P4 d
$ O9 I4 {9 v, d- o2 g: k .name = "user_led0",: s' z7 K- G# J/ U j: j
5 A) J6 E5 l2 J; ` .default_trigger = "default-on",3 L5 N! N3 u( G, c
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{
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+ I/ N4 f$ f8 o0 f' f; ^ }$ ]0 c .active_low = 0,
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.gpio = DA850_USER_LED1,
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4 H2 I9 T: j0 i, W0 }/ r .name = "user_led1",
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.default_trigger = "default-on",
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},
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4 o* {8 W1 e: N .active_low = 0," f1 ?: K) l$ W8 u: l
; J/ I7 ?" R) ?, w1 `' D8 T .gpio = DA850_USER_LED2,0 n/ e R+ Y6 g6 z; a: q, J
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.name = "user_led2",
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.default_trigger = "default-on",
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.active_low = 0,
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.gpio = DA850_USER_LED3,& S5 W3 D' m: \
3 H: U( \! e+ o .name = "user_led3",
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.default_trigger = "default-on",
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.active_low = 0,
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8 b0 l6 |, N) B .gpio = DA850_USER_LED4,
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.name = "user_led4",6 p x" x3 y! \0 g. P8 I
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.default_trigger = "default-on",
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{
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: ^, p2 a6 b3 ^# f# U* b. V .active_low = 0,2 f; J, R3 a, m9 ^+ Y
( j% O9 m; B- {) H$ C% a2 a1 E# m .gpio = DA850_USER_LED5,
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.name = "user_led5",) ?; ?! t% T) g! {& j4 v: e' f
4 k) e& }. r% |6 m x. q: B .default_trigger = "default-on", G2 m- ]$ M$ d1 {0 l
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static struct gpio_led_platform_data da850_evm_tl_leds_pdata = {
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+ j" h3 V) |* X. b. { .leds = da850_evm_tl_leds,
6 e8 |& H% s$ M5 o! q2 }
2 A U" S" W' Y, X4 \ .num_leds = ARRAY_SIZE(da850_evm_tl_leds),$ W* [' ?$ _4 l) H
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};
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6 h( x* q% x2 S: p& @0 Ustatic void led_dev_release(struct device *dev)
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* [3 q# H7 _- s6 t{
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};
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static struct platform_device da850_evm_tl_leds_device = {
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.name = "leds-gpio",
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.id = 1,6 ?/ L( \& H) u! X! V; T ]6 p! B
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.dev = {
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.platform_data = &da850_evm_tl_leds_pdata,/ L( S" m5 y# o1 E: [, W
& E) Z% S6 p; |2 B4 k+ e .release = led_dev_release,
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};
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4 W, k& [0 _& W: `static int __init led_platform_init(void)3 p% }1 q* t/ E; H! k. I
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- t q$ J/ l& R( T& q: B1 {8 F4 f int ret;0 e4 q/ y! Y; x, f* k9 E
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#if 05 X( O) R6 q" z1 \- C. m8 }; x+ s
7 \. j1 o, j# U$ A" S0 c0 p$ I ret = davinci_cfg_reg_list(da850_evm_tl_user_led_pins);
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if (ret)
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4 x$ R5 ?) C, Q4 |9 Y0 v: k0 p pr_warning("da850_evm_tl_leds_init : User LED mux failed :"
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"%d\n", ret);
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# v' {: s9 y1 i; ~ ?* @6 ~#endif
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ret = platform_device_register(&da850_evm_tl_leds_device);
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pr_warning("Could not register som GPIO expander LEDS");* @( h9 N& K H% ]
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else
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/ |! A; |/ s- ?* _. T i1 Q printk(KERN_INFO "LED register sucessful!\n");
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return ret;2 D& K2 _) T- T" m
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- P6 X* ]' y: q- j$ N% p; rstatic void __exit led_platform_exit(void) a2 N% `% n# U% Z* Z4 d( Q' _
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{
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" _+ `7 v/ G* }- x. ]3 N) l& z/ u' Y' V y platform_device_unregister(&da850_evm_tl_leds_device);* m! U v; l& Z7 W' ?
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, w- h5 e& j: R7 l# d4 N% u2 } printk(KERN_INFO "LED unregister!\n");
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}
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module_init(led_platform_init);
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module_exit(led_platform_exit);
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* T T' {4 M0 K4 g/ DMODULE_DESCRIPTION("Led platform driver");
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/ N" s m: w+ E6 q: l% OMODULE_AUTHOR("Tronlong");
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8 ~6 Z& i% U' E2 aMODULE_LICENSE("GPL"); |
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