openwrt/target/linux/mediatek/patches-4.14/0162-mtd-nand-mtk-use-nand_reset-to-reset-NAND-devices-in.patch

From fb607c7c1eaeb47ec2ffed99cab571892cb6af7d Mon Sep 17 00:00:00 2001
From: Xiaolei Li <xiaolei.li@mediatek.com>
Date: Thu, 2 Nov 2017 10:05:07 +0800
Subject: [PATCH 162/224] mtd: nand: mtk: use nand_reset() to reset NAND
 devices in resume function

Previously, we only select chips and then send reset command to a NAND
device during resuming nand driver. There is a lack of deselecting chips.
It is advised to reset and initialize a NAND device using nand_reset().

Signed-off-by: Xiaolei Li <xiaolei.li@mediatek.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
 drivers/mtd/nand/mtk_nand.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

--- a/drivers/mtd/nand/mtk_nand.c
+++ b/drivers/mtd/nand/mtk_nand.c
@@ -1540,7 +1540,6 @@ static int mtk_nfc_resume(struct device
 	struct mtk_nfc *nfc = dev_get_drvdata(dev);
 	struct mtk_nfc_nand_chip *chip;
 	struct nand_chip *nand;
-	struct mtd_info *mtd;
 	int ret;
 	u32 i;
 
@@ -1553,11 +1552,8 @@ static int mtk_nfc_resume(struct device
 	/* reset NAND chip if VCC was powered off */
 	list_for_each_entry(chip, &nfc->chips, node) {
 		nand = &chip->nand;
-		mtd = nand_to_mtd(nand);
-		for (i = 0; i < chip->nsels; i++) {
-			nand->select_chip(mtd, i);
-			nand->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
-		}
+		for (i = 0; i < chip->nsels; i++)
+			nand_reset(nand, i);
 	}
 
 	return 0;