store_tabletStylusLower(struct device *dev, const char *buf, size_t count)
store_tabletStylusLower(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
store_tabletStylusLower(struct device *dev, const char *buf, size_t count){	struct aiptek *aiptek = dev_get_drvdata(dev);	if (aiptek == NULL)		return 0;	if (strcmp(buf, "upper") == 0) {		aiptek->newSetting.stylusButtonLower =		    AIPTEK_STYLUS_UPPER_BUTTON;	} else if (strcmp(buf, "lower") == 0) {		aiptek->newSetting.stylusButtonLower =		    AIPTEK_STYLUS_LOWER_BUTTON;	}	return count;}