diff mbox

[U-Boot,2/3] mtd: nand: mxs check maximum ecc that platfrom supports

Message ID 1437385222-23921-2-git-send-email-Peng.Fan@freescale.com
State Superseded
Delegated to: Scott Wood
Headers show

Commit Message

Peng Fan July 20, 2015, 9:40 a.m. UTC 
Check maximum ecc strength for each platfrom to avoid the calculated ecc
exceed the limitation.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Signed-off-by: Han Xu <b45815@freescale.com>
---
 drivers/mtd/nand/mxs_nand.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

Comments

Marek Vasut July 21, 2015, 1:57 a.m. UTC | #1 
On Monday, July 20, 2015 at 11:40:21 AM, Peng Fan wrote:
> Check maximum ecc strength for each platfrom to avoid the calculated ecc
> exceed the limitation.
> 
> Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
> Signed-off-by: Han Xu <b45815@freescale.com>

Reviewed-by: Marek Vasut <marex@denx.de>

Best regards,
Marek Vasut
diff mbox

Patch

diff --git a/drivers/mtd/nand/mxs_nand.c b/drivers/mtd/nand/mxs_nand.c
index 33ce817..97011b2 100644
--- a/drivers/mtd/nand/mxs_nand.c
+++ b/drivers/mtd/nand/mxs_nand.c
@@ -149,6 +149,13 @@  static inline uint32_t mxs_nand_get_ecc_strength(uint32_t page_data_size,
 						uint32_t page_oob_size)
 {
 	int ecc_strength;
+	int max_ecc_strength_supported;
+
+	/* Refer to Chapter 17 for i.MX6DQ, Chapter 18 for i.MX6SX */
+	if (is_cpu_type(MXC_CPU_MX6SX))
+		max_ecc_strength_supported = 62;
+	else
+		max_ecc_strength_supported = 40;
 
 	/*
 	 * Determine the ECC layout with the formula:
@@ -162,7 +169,7 @@  static inline uint32_t mxs_nand_get_ecc_strength(uint32_t page_data_size,
 			/ (galois_field *
 			   mxs_nand_ecc_chunk_cnt(page_data_size));
 
-	return round_down(ecc_strength, 2);
+	return min(round_down(ecc_strength, 2), max_ecc_strength_supported);
 }
 
 static inline uint32_t mxs_nand_get_mark_offset(uint32_t page_data_size,