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#include <linux/input.h>
#include <linux/rotary_encoder.h>

//#define GPIO_ROTARY_A 1
//#define GPIO_ROTARY_B 2

static struct rotary_encoder_platform_data my_rotary_encoder_info = {
	.steps		= 24,
	.axis		= ABS_X,
	.relative_axis	= false,
	.rollover	= false,
	.gpio_a		= GPIO_PC(5), //GPIO_ROTARY_A, 填入实际引脚A
	.gpio_b		= GPIO_PC(4), //GPIO_ROTARY_B, 填入实际引脚B
	.inverted_a	= 0,
	.inverted_b	= 0,
	.half_period	= false,
	//.wakeup_source	= false,
};

static struct platform_device rotary_encoder_device = {
	.name		= "rotary-encoder",
	.id		= 0,
	.dev		= {
		.platform_data = &my_rotary_encoder_info,
	}
};

              Device Drivers  --->      Input device support  --->  Miscellaneous devices  
--->     <*>   Rotary encoders connected to GPIO pins

              Device Drivers  --->      Input device support  --->    <*>   Event interface