MLK-12603: mtd: gpmi: may use legacy bch geometry in u-boot

provide one config "CONFIG_NAND_MXS_BCH_LEGACY_GEO" to keep using legacy bch geometry. NOTICE: the feature must be enabled/disabled in both u-boot and kernel. Signed-off-by: Han Xu <han.xu@nxp.com> (cherry picked from commit 0abc9c182c24f88522bd74fa1b53cd2fa3477184)

MLK-12603: mtd: gpmi: may use legacy bch geometry in u-boot
provide one config "CONFIG_NAND_MXS_BCH_LEGACY_GEO" to keep using legacy bch geometry. NOTICE: the feature must be enabled/disabled in both u-boot and kernel. Signed-off-by: Han Xu <han.xu@nxp.com> (cherry picked from commit 0abc9c182c24f88522bd74fa1b53cd2fa3477184)
Han Xu · Peng Fan · Eric Lee · Eric Lee · Eric Lee · Eric Lee
1 parent 67c19ad1a2
Showing 1 changed file with 6 additions and 0 deletions Side-by-side Diff
drivers/mtd/nand/mxs_nand.c
@@ -249,6 +249,12 @@
 	} else {
 		ecc_strength = chip->ecc_strength_ds;
 		ecc_strength += ecc_strength & 1;
+#if defined(CONFIG_NAND_MXS_BCH_LEGACY_GEO)
+		ecc_strength = ((page_oob_size - MXS_NAND_METADATA_SIZE) * 8)
+			/(galois_field * mxs_nand_ecc_chunk_cnt(mtd->writesize));
+		ecc_strength += ecc_strength & 1;
+		ecc_strength = min(ecc_strength, MXS_NAND_MAX_ECC_STRENGTH);
+#endif
 	}
 	return 0;
 };
...	...	@@ -249,6 +249,12 @@
249	249	} else {
250	250	ecc_strength = chip->ecc_strength_ds;
251	251	ecc_strength += ecc_strength & 1;
	252	+#if defined(CONFIG_NAND_MXS_BCH_LEGACY_GEO)
	253	+ ecc_strength = ((page_oob_size - MXS_NAND_METADATA_SIZE) * 8)
	254	+ /(galois_field * mxs_nand_ecc_chunk_cnt(mtd->writesize));
	255	+ ecc_strength += ecc_strength & 1;
	256	+ ecc_strength = min(ecc_strength, MXS_NAND_MAX_ECC_STRENGTH);
	257	+#endif
252	258	}
253	259	return 0;
254	260	};