openwrt/target/linux/generic/pending-4.19/466-Revert-mtd-spi-nor-fix-Spansion-regressions-aliased-.patch

From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Tue, 9 Jan 2018 20:41:48 +0100
Subject: [PATCH] Revert "mtd: spi-nor: fix Spansion regressions (aliased with
 Winbond)"

This reverts commit 67b9bcd36906e12a15ffec19463afbbd6a41660e.

The underlying issue breaking Spansion flash has been fixed with "mtd: spi-nor:
wait until lock/unlock operations are ready" and "mtd: spi-nor: wait for SR_WIP
to clear on initial unlock", so we can support unlocking for Winbond flash
again.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
---
 drivers/mtd/spi-nor/spi-nor.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -2737,6 +2737,7 @@ static int spi_nor_init(struct spi_nor *
 	    JEDEC_MFR(nor->info) == SNOR_MFR_INTEL ||
 	    JEDEC_MFR(nor->info) == SNOR_MFR_MACRONIX ||
 	    JEDEC_MFR(nor->info) == SNOR_MFR_SST ||
+	    JEDEC_MFR(nor->info) == SNOR_MFR_WINBOND ||
 	    nor->info->flags & SPI_NOR_HAS_LOCK) {
 		write_enable(nor);
 		write_sr(nor, 0);
@@ -2873,7 +2874,8 @@ int spi_nor_scan(struct spi_nor *nor, co
 
 	/* NOR protection support for STmicro/Micron chips and similar */
 	if (JEDEC_MFR(info) == SNOR_MFR_MICRON ||
-			info->flags & SPI_NOR_HAS_LOCK) {
+	    JEDEC_MFR(info) == SNOR_MFR_WINBOND ||
+	    info->flags & SPI_NOR_HAS_LOCK) {
 		nor->flash_lock = stm_lock;
 		nor->flash_unlock = stm_unlock;
 		nor->flash_is_locked = stm_is_locked;