STMPE_IDX_GPAFR_U_MSB
u8 regaddr = stmpe->regs[STMPE_IDX_GPAFR_U_MSB];
[STMPE_IDX_GPAFR_U_MSB] = STMPE811_REG_GPIO_AF,
[STMPE_IDX_GPAFR_U_MSB] = STMPE1601_REG_GPIO_AF_U_MSB,
[STMPE_IDX_GPAFR_U_MSB] = STMPE24XX_REG_GPAFR_U_MSB,