[U-Boot] [[PATCH 5/7 v1] NAND: DaVinci: allow forced disable of subpage writes

[Murali Karicheri]

This patch introduces a configurable mechanism to disable
subpage writes in the DaVinci NAND driver.

Signed-off-by: Vitaly Andrianov <vitalya at ti.com>
Signed-off-by: Murali Karicheri <m-karicheri2 at ti.com>
---
 - Updated README to include the option as per review comments
 README                          |    5 +++++
 drivers/mtd/nand/davinci_nand.c |    3 +++
 2 files changed, 8 insertions(+)

diff --git a/README b/README
index aea82be..caf60a2 100644
--- a/README
+++ b/README
@@ -4427,6 +4427,11 @@ Low Level (hardware related) configuration options:
 - CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC:
 		Enables the RTC32K OSC on AM33xx based plattforms
 
+- CONFIG_SYS_NAND_NO_SUBPAGE_WRITE
+		Option to disable subpage write in NAND driver
+		Example driver that use this:
+		drivers/mtd/nand/davinci_nand.c
+
 Freescale QE/FMAN Firmware Support:
 -----------------------------------
 
diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c
index 5b17d7b..75b03a7 100644
--- a/drivers/mtd/nand/davinci_nand.c
+++ b/drivers/mtd/nand/davinci_nand.c
@@ -609,6 +609,9 @@ void davinci_nand_init(struct nand_chip *nand)
 #ifdef CONFIG_SYS_NAND_USE_FLASH_BBT
 	nand->bbt_options	  |= NAND_BBT_USE_FLASH;
 #endif
+#ifdef CONFIG_SYS_NAND_NO_SUBPAGE_WRITE
+	nand->options	  |= NAND_NO_SUBPAGE_WRITE;
+#endif
 #ifdef CONFIG_SYS_NAND_HW_ECC
 	nand->ecc.mode = NAND_ECC_HW;
 	nand->ecc.size = 512;
-- 
1.7.9.5