sahara_read
unsigned int stat = sahara_read(dev, SAHARA_REG_STATUS);
unsigned int err = sahara_read(dev, SAHARA_REG_ERRSTATUS);
version = sahara_read(dev, SAHARA_REG_VERSION);
sahara_read(dev, SAHARA_REG_CDAR));
sahara_read(dev, SAHARA_REG_IDAR));