请教！！！

struct pxa3xx_pin_config littleton_keyp_pins[] = {
PXA3xx_MFP_CFG("KEYP DKIN0",  MFP_KP_DKIN_0,  MFP_AF2, MFP_DS03X, 0, MFP_LPM_FLOAT, MFP_EDGE_BOTH),
PXA3xx_MFP_CFG("KEYP DKIN1",  MFP_KP_DKIN_1,  MFP_AF2, MFP_DS03X, 0, MFP_LPM_FLOAT, MFP_EDGE_BOTH),
PXA3xx_MFP_CFG("KEYP MKIN0",  MFP_KP_MKIN_0,  MFP_AF1, MFP_DS03X, 0, MFP_LPM_FLOAT, MFP_EDGE_BOTH),
PXA3xx_MFP_CFG("KEYP MKIN1",  MFP_KP_MKIN_1,  MFP_AF1, MFP_DS03X, 0, MFP_LPM_FLOAT, MFP_EDGE_BOTH),
PXA3xx_MFP_CFG("KEYP MKIN2",  MFP_KP_MKIN_2,  MFP_AF1, MFP_DS03X, 0, MFP_LPM_FLOAT, MFP_EDGE_BOTH),
PXA3xx_MFP_CFG("KEYP MKIN3",  MFP_KP_MKIN_3,  MFP_AF1, MFP_DS03X, 0, MFP_LPM_FLOAT, MFP_EDGE_BOTH),
PXA3xx_MFP_CFG("KEYP MKIN4",  MFP_KP_MKIN_4,  MFP_AF1, MFP_DS03X, 0, MFP_LPM_FLOAT, MFP_EDGE_BOTH),
PXA3xx_MFP_CFG("KEYP MKIN5",  MFP_KP_MKIN_5,  MFP_AF1, MFP_DS03X, 0, MFP_LPM_FLOAT, MFP_EDGE_BOTH),
PXA3xx_MFP_CFG("KEYP MKOUT0", MFP_KP_MKOUT_0, MFP_AF1, MFP_DS03X, 1, MFP_LPM_DRIVE_HIGH, MFP_EDGE_NONE),
PXA3xx_MFP_CFG("KEYP MKOUT1", MFP_KP_MKOUT_1, MFP_AF1, MFP_DS03X, 1, MFP_LPM_DRIVE_HIGH, MFP_EDGE_NONE),
PXA3xx_MFP_CFG("KEYP MKOUT2", MFP_KP_MKOUT_2, MFP_AF1, MFP_DS03X, 1, MFP_LPM_DRIVE_HIGH, MFP_EDGE_NONE),
PXA3xx_MFP_CFG("KEYP MKOUT3", MFP_KP_MKOUT_3, MFP_AF1, MFP_DS03X, 1, MFP_LPM_DRIVE_HIGH, MFP_EDGE_NONE),
PXA3xx_MFP_CFG("KEYP MKOUT4", MFP_KP_MKOUT_4, MFP_AF1, MFP_DS03X, 1, MFP_LPM_DRIVE_HIGH, MFP_EDGE_NONE),
};
这里面的MFP_EDGE_BOTH ， MFP_EDGE_NONE分别代表什么啊？
MFP_LPM_FLOAT， MFP_LPM_DRIVE_HIGH又代表什么啊？ MFP_DS03X是什么呢？