S5PV210平台Keypad驱动

最新推荐文章于 2021-02-23 20:23:57 发布

原创

最新推荐文章于 2021-02-23 20:23:57 发布 · 1k 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#linux内核

本文主要探讨S5PV210平台的按键驱动实现，涉及s3c-keypad.c、s3c-keypad.h、mach-smdkv210.c、devs.c和map.h等关键源码文件。在mach-smdkv210.c的第1957行及s3c-keypad.c的第213行，详细配置了键盘矩阵的钩子函数，实现了x*y的按键布局。

一、按键驱动的主要源码：

s3c-keypad.c、s3c-keypad.h、mach-smdkv210.c、devs.c、map.h

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

mach-smdkv210.c

@lines1957

void s3c_setup_keypad_cfg_gpio(void)
{
	unsigned int gpio;
	unsigned int end;

	/* gpio setting for KP_COL0 */
	s3c_gpio_cfgpin(S5PV210_GPJ1(5), S3C_GPIO_SFN(3));
	s3c_gpio_setpull(S5PV210_GPJ1(5), S3C_GPIO_PULL_NONE);

	/* gpio setting for KP_COL1 ~ KP_COL7 and KP_ROW0 */
	end = S5PV210_GPJ2(8);
	for (gpio = S5PV210_GPJ2(0); gpio < end; gpio++) {
		s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));
		s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
	}

	/* gpio setting for KP_ROW1 ~ KP_ROW8 */
	end = S5PV210_GPJ3(8);
	for (gpio = S5PV210_GPJ3(0); gpio < end; gpio++) {
		s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));
		s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
	}

	/* gpio setting for KP_ROW9 ~ KP_ROW13 */
	end = S5PV210_GPJ4(5);
	for (gpio = S5PV210_GPJ4(0); gpio < end; gpio++) {
		s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));
		s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
	}
}

devs.c
@arch/arm/plat-s5pv/ =>lines376

static struct resource s3c_keypad_resource[] = {
        [0] = {
                .start = S3C_PA_KEYPAD,
                .end   = S3C_PA_KEYPAD+ S3C_SZ_KEYPAD - 1,
                .flags = IORESOURCE_MEM,
        },
        [1] = {
                .start = IRQ_KEYPAD,
                .end   = IRQ_KEYPAD,
                .flags = IORESOURCE_IRQ,
        }
};
struct platform_device s3c_device_keypad = {
        .name             = "s3c-keypad",

最低0.47元/天解锁文章