FSP_REG_SYSCTL5
if (fsp_reg_read(psmouse, FSP_REG_SYSCTL5, &v2))
if (fsp_reg_write(psmouse, FSP_REG_SYSCTL5, v2))
if (fsp_reg_read(psmouse, FSP_REG_SYSCTL5, &val)) {
if (fsp_reg_write(psmouse, FSP_REG_SYSCTL5, val)) {