From: Dinesh Maniyam <dinesh.maniyam@intel.com>
Date: Wed, 26 Feb 2025 16:18:25 +0000 (+0800)
Subject: drivers: mtd: nand: cadence: Use bounce buffer
X-Git-Tag: v2025.07-rc1~18^2~32^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2b2745b18967e4ec04c04630744eb35b908546ee;p=pandora-u-boot.git

drivers: mtd: nand: cadence: Use bounce buffer

Enable nand to use bounce buffer. In bounce buffer,
read/write buf will use cadence->buf which has been allocated
using malloc. This will align the memory and avoid memory to be
allocated in different addresses.

Signed-off-by: Dinesh Maniyam <dinesh.maniyam@intel.com>
---

diff --git a/drivers/mtd/nand/raw/cadence_nand.c b/drivers/mtd/nand/raw/cadence_nand.c
index e571e5a6868..27aa7f97a45 100644
--- a/drivers/mtd/nand/raw/cadence_nand.c
+++ b/drivers/mtd/nand/raw/cadence_nand.c
@@ -980,7 +980,7 @@ static int cadence_nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
 	cadence_nand_prepare_data_size(mtd, TT_MAIN_OOB_AREA_EXT);
 
 	if (cadence_nand_dma_buf_ok(cadence, buf, mtd->writesize) &&
-	    cadence->caps2.data_control_supp) {
+	    cadence->caps2.data_control_supp && !(chip->options & NAND_USE_BOUNCE_BUFFER)) {
 		u8 *oob;
 
 		if (oob_required)
@@ -1156,7 +1156,7 @@ static int cadence_nand_read_page(struct mtd_info *mtd, struct nand_chip *chip,
 	 * is supported then transfer data and oob directly.
 	 */
 	if (cadence_nand_dma_buf_ok(cadence, buf, mtd->writesize) &&
-	    cadence->caps2.data_control_supp) {
+	    cadence->caps2.data_control_supp && !(chip->options & NAND_USE_BOUNCE_BUFFER)) {
 		u8 *oob;
 
 		if (oob_required)
@@ -1859,6 +1859,7 @@ static int cadence_nand_attach_chip(struct nand_chip *chip)
 			return ret;
 	}
 
+	chip->options |= NAND_USE_BOUNCE_BUFFER;
 	chip->bbt_options |= NAND_BBT_USE_FLASH;
 	chip->bbt_options |= NAND_BBT_NO_OOB;
 	chip->ecc.mode = NAND_ECC_HW_SYNDROME;