STMPE_IDX_GPMR_CSB
ret = stmpe_reg_read(stmpe, stmpe->regs[STMPE_IDX_GPMR_CSB]);
[STMPE_IDX_GPMR_CSB] = STMPE1600_REG_GPMR_MSB,
[STMPE_IDX_GPMR_CSB] = STMPE1601_REG_GPIO_MP_MSB,
[STMPE_IDX_GPMR_CSB] = STMPE1801_REG_GPIO_MP_MID,
[STMPE_IDX_GPMR_CSB] = STMPE24XX_REG_GPMR_CSB,