嵌入式linux矩阵键盘驱动

[luheng2006]

ARM:AM3517
linux2.6.37
TI官方开发板AM3517EVM

我想移植一个8*5的GPIO矩阵键盘，在linux源码/drivers/input/目录下有很多种键盘驱动程序，但是
能用到自己项目上的似乎只有matrix-keypad键盘驱动，我在board-am3517evm.c中定义好了键盘资源，如下：

static const unsigned int matrix_keypad_cols[] = {128,129,130,131,132};
static const unsigned int matrix_keypad_rows[] = {120,121,122,123,124,125,126,127};
static uint32_t am3505_keymap[] __initdata =
{
//KEY(row, col, keycode)
KEY(0,0, KEY_F1), KEY(0,1, KEY_1), KEY(0,2, KEY_4), KEY(0,3, KEY_7), KEY(0,4,KEY_PROG1),
KEY(1,0, KEY_F2), KEY(1,1, KEY_2), KEY(1,2, KEY_5), KEY(1,3, KEY_8),KEY(1,4,KEY_PROG2),
KEY(2,0, KEY_F3), KEY(2,1, KEY_3), KEY(2,2, KEY_6), KEY(2,3, KEY_9),KEY(2,4,KEY_PROG3),
KEY(3,0, KEY_F4),KEY(3,1, KEY_0),KEY(3,2,KEY_DOT),KEY(3,3,KEY_HELP),KEY(3,4,KEY_PROG4),
KEY(4,0, KEY_F5), KEY(4,1, KEY_DELETE), KEY(4,2, KEY_INSERT), KEY(4,3, KEY_SETUP), KEY(4,4, KEY_B),
KEY(5,0, KEY_F6), KEY(5,1, KEY_HOMEPAGE), KEY(5,2, KEY_ESC), KEY(5,3, KEY_LEFT), KEY(5,4, KEY_W),
KEY(6,0, KEY_F7), KEY(6,1, KEY_END), KEY(6,2, KEY_UP), KEY(6,3, KEY_ENTER), KEY(6,4, KEY_DOWN),
KEY(7,0, KEY_F8), KEY(7,1, KEY_PAGEUP), KEY(7,2, KEY_PAGEDOWN), KEY(7,3, KEY_RIGHT), KEY(7,4, KEY_POWER),
};
static struct matrix_keymap_data am3505_keymap_data __initdata =
{
.keymap = am3505_keymap,
.keymap_size =ARRAY_SIZE(am3505_keymap),
};
static struct matrix_keypad_platform_data am3505_keypad_data __initdata =
{
.keymap_data = &am3505_keymap_data,
.col_gpios = matrix_keypad_cols,
.row_gpios = matrix_keypad_rows,
.num_col_gpios = ARRAY_SIZE(matrix_keypad_cols),
.num_row_gpios = ARRAY_SIZE(matrix_keypad_rows),
.col_scan_delay_us = 10,
.debounce_ms = 80,
// .wakeup = 1,
.active_low = 1,
// .no_autorepeat = 1,
};
配置GPIO口
OMAP3_MUX(SDMMC1_CLK, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLDOWN),
OMAP3_MUX(SDMMC1_CMD, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLDOWN),
OMAP3_MUX(SDMMC1_DAT0, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLDOWN),
OMAP3_MUX(SDMMC1_DAT1, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLDOWN),
OMAP3_MUX(SDMMC1_DAT2, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLDOWN),
OMAP3_MUX(SDMMC1_DAT3, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLDOWN),
OMAP3_MUX(SDMMC1_DAT4, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLDOWN),
OMAP3_MUX(SDMMC1_DAT5, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLDOWN),

OMAP3_MUX(SDMMC1_DAT6, OMAP_MUX_MODE4 | OMAP_PIN_OUTPUT),
OMAP3_MUX(SDMMC1_DAT7, OMAP_MUX_MODE4 | OMAP_PIN_OUTPUT),
OMAP3_MUX(SDMMC2_CLK, OMAP_MUX_MODE4 | OMAP_PIN_OUTPUT),
OMAP3_MUX(SDMMC2_CMD, OMAP_MUX_MODE4 | OMAP_PIN_OUTPUT),
OMAP3_MUX(SDMMC2_DAT0, OMAP_MUX_MODE4 | OMAP_PIN_OUTPUT),

加入到设备列表中
static struct platform_device *am3517_evm_devices[] __initdata = {
&am3517_evm_dss_device,
&matrix_device_keypad,
};

1 请问以上的键盘代码移植是否有问题？
2 板卡启动后，行按键中断可以响应，在matrix-keypad.c文件函数matrix_keypad_interrupt中
打印调试信息printk();说明可以响应行中断，schedule_delayed_work(&keypad->work,msecs_to_jiffies(keypad->pdata->debounce_ms));中的keypad->pdata->debounce_ms值为负值，我在上面明明设置抖动时间为80；不知道是说明原因？

[luheng2006]

搞错了，tsc2004_init_irq是触摸屏的硬件防抖，gpio_set_debounce(GPIO_TSC2004_IRQ, 0xa);
应该和键盘无关。
按键时响应中断进入matrix_keypad_interrupt，传进来的keypad->pdata->debounce_ms值为负值

[luheng2006]

我现在查出来和TSC时钟相关，
#define GPIO_TSC2004_IRQ 65
static int tsc2004_init_irq(void)
{
int ret = 0;

ret = gpio_request(GPIO_TSC2004_IRQ, "tsc2004-irq");
if (ret < 0) {
printk(KERN_WARNING "failed to request GPIO#%d: %d\n",
GPIO_TSC2004_IRQ, ret);
return ret;
}

if (gpio_direction_input(GPIO_TSC2004_IRQ)) {
printk(KERN_WARNING "GPIO#%d cannot be configured as "
"input\n", GPIO_TSC2004_IRQ);
return -ENXIO;
}

gpio_set_debounce(GPIO_TSC2004_IRQ, 0xa);
return ret;
}
开发板的gpio65脚接了TSC时钟，可是我们自己做的板子没有用这个时钟芯片，但是有实时时钟芯片，不知道要怎样修改这个地方

[163luheng]

__initdata只在内核初始化的时候分配空间，进入文件系统后就会释放掉内存，去掉这个看看