S3C6410(Real6410) Linux 6x6矩阵键盘驱动移植
BY: zsz @ 2012.06.01
Real6410默认的键盘驱动是gpio键盘驱动，现在要取消gpio键盘，实现矩阵键盘。6410的矩阵键盘驱动对应的是samsung-keypad.c,位于driver/input/keyboard目录，可按照下面步骤进行移植。
1、 在arch/arm/mach-s3c64xx/mach-real6410.c中签加
添加头文件：
#include <plat/keypad.h>
添加struct定义
static uint32_t smdk6410_keymap[] __initdata = {
/* KEY(row, col, keycode) */
/*S00(0,0), S01(0,1), S02(0,2), S03(0,3)*/
KEY(0, 0, KEY_F1), KEY(0, 1, KEY_F2), KEY(0, 2, KEY_F3), KEY(0,3,KEY_F4),
/*S04(0,4), S05(0,5), S06(4,0), S07(5,0)*/
KEY(0, 4, KEY_1), KEY(0, 5, KEY_2), KEY(4, 0, KEY_3), KEY(5,0,KEY_UP),
/*S08(1,0), S09(1,1), S0A(1,2), S0B(1,3)*/
KEY(1, 0, KEY_F5), KEY(1, 1, KEY_F6), KEY(1, 2, KEY_F7), KEY(1,3,KEY_F8),
/*S0C(1,4), S0D(1,5), S0E(4,1), S0F(5,1)*/
KEY(1, 4, KEY_4), KEY(1, 5, KEY_5), KEY(4, 1, KEY_6), KEY(5,1,KEY_LEFT),
/*S10(2,0), S11(2,1), S12(2,2), S13(2,3)*/
KEY(2, 0, KEY_F9), KEY(2, 1, KEY_F10), KEY(2, 2, KEY_F11), KEY(2,3,KEY_F12),
/*S14(2,4), S15(2,5), S16(4,2), S17(5,2)*/
KEY(2, 4, KEY_7), KEY(2, 5, KEY_8), KEY(4, 2, KEY_9), KEY(5,2,KEY_DOWN),
/*S18(3,0), S19(3,1), S1A(3,2), S1B(3,3)*/
KEY(3, 0, KEY_DOT), KEY(3, 1, KEY_0), KEY(3, 2, KEY_MINUS), KEY(3,3,KEY_ESC),
/*S1C(3,4), S1D(3,5), S1E(4,3), S1F(5,3)*/
KEY(3, 4, KEY_TAB), KEY(3, 5, KEY_BACKSPACE), KEY(4, 3, KEY_ENTER), KEY(5,3,KEY_RIGHT)
};
static struct matrix_keymap_data smdk6410_keymap_data __initdata = {
.keymap = smdk6410_keymap,
.keymap_size = ARRAY_SIZE(smdk6410_keymap),
};
static struct samsung_keypad_platdata smdk6410_keypad_data __initdata = {
.keymap_data = &smdk6410_keymap_data,
.rows = 6,
.cols = 6,
};
2、 在static struct platform_device *real6410_devices[] __initdata结构中增加
&samsung_device_keypad,
同时屏蔽&s3c_device_gpio_button,
/*
&s3c_device_gpio_button,
*/
3、在static void __init real6410_machine_init(void)函数中加上
samsung_keypad_set_platdata(&smdk6410_keypad_data);
设置键盘参数。samsung_keypad_set_platdata在arch/arm/plat-samsung/dev-keypap.c中实现。
4、 修改配置，在linux目录下执行make xconfig, 进入input device support->keyboards, 取消掉S3C6410 GPIO Buttons
选上Samsung keypad support
保存并退出xconfig，重新make即可。