One more nit noticed by my build tests: On Wed, Aug 19, 2015 at 10:19:03AM +0530, Archit Taneja wrote:
[...] > +static int qcom_nandc_ecc_init(struct qcom_nandc_data *this) > +{ > + struct mtd_info *mtd = &this->mtd; > + struct nand_chip *chip = &this->chip; > + struct nand_ecc_ctrl *ecc = &chip->ecc; > + int cwperpage; drivers/mtd/nand/qcom_nandc.c: In function ‘qcom_nandc_ecc_init’: drivers/mtd/nand/qcom_nandc.c:1517:6: warning: variable ‘cwperpage’ set but not used [-Wunused-but-set-variable] > + bool wide_bus; > + > + /* the nand controller fetches codewords/chunks of 512 bytes */ > + cwperpage = mtd->writesize >> 9; > + > + ecc->strength = this->ecc_strength; > + > + wide_bus = chip->options & NAND_BUSWIDTH_16 ? true : false; > + > + if (ecc->strength >= 8) { > + /* 8 bit ECC defaults to BCH ECC on all platforms */ > + ecc->bytes = wide_bus ? 14 : 13; > + } else { > + /* > + * if the controller supports BCH for 4 bit ECC, the controller > + * uses lesser bytes for ECC. If RS is used, the ECC bytes is > + * always 10 bytes > + */ > + if (this->ecc_modes & ECC_BCH_4BIT) > + ecc->bytes = wide_bus ? 8 : 7; > + else > + ecc->bytes = 10; > + } > + > + /* each step consists of 512 bytes of data */ > + ecc->size = NANDC_STEP_SIZE; > + > + ecc->read_page = qcom_nandc_read_page; > + ecc->read_oob = qcom_nandc_read_oob; > + ecc->write_page = qcom_nandc_write_page; > + ecc->write_oob = qcom_nandc_write_oob; > + > + /* > + * the bad block marker is readable only when we read the page with ECC > + * disabled. all the ops above run with ECC enabled. We need raw read > + * and write function for oob in order to access bad block marker. > + */ > + ecc->read_oob_raw = qcom_nandc_read_oob_raw; > + ecc->write_oob_raw = qcom_nandc_write_oob_raw; > + > + switch (mtd->oobsize) { > + case 64: > + ecc->layout = &layout_oob_64; > + break; > + case 128: > + ecc->layout = &layout_oob_128; > + break; > + case 224: > + if (wide_bus) > + ecc->layout = &layout_oob_224_x16; > + else > + ecc->layout = &layout_oob_224_x8; > + break; > + case 256: > + ecc->layout = &layout_oob_256; > + break; > + default: > + dev_err(this->dev, "unsupported NAND device, oobsize %d\n", > + mtd->oobsize); > + return -ENODEV; > + } > + > + ecc->mode = NAND_ECC_HW; > + > + /* enable ecc by default */ > + this->use_ecc = true; > + > + return 0; > +} [...] Brian -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/