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From:   Alexander A Sverdlin <alexander.sverdlin@nokia.com>
To:     linux-mtd@lists.infradead.org
Cc:     Alexander Sverdlin <alexander.sverdlin@nokia.com>,
        Tudor Ambarus <tudor.ambarus@microchip.com>,
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        Richard Weinberger <richard@nod.at>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        linux-kernel@vger.kernel.org
Subject: [PATCH 2/2] mtd: spi-nor: micron/st: Hardcode erase_proto to 1-1-1
Date:   Thu,  9 Dec 2021 11:08:13 +0100
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From: Alexander Sverdlin <alexander.sverdlin@nokia.com>

This fixes sector erase on mt25qu256aba8e12-1sit.
Looks like others like mt35xu512aba could be affected as well.

Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
---
 drivers/mtd/spi-nor/micron-st.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/mtd/spi-nor/micron-st.c b/drivers/mtd/spi-nor/micron-st.c
index 2f3054b..058bbb7 100644
--- a/drivers/mtd/spi-nor/micron-st.c
+++ b/drivers/mtd/spi-nor/micron-st.c
@@ -267,6 +267,12 @@ static void micron_st_default_init(struct spi_nor *nor)
 	nor->flags &= ~SNOR_F_HAS_16BIT_SR;
 	nor->params->quad_enable = NULL;
 	nor->params->set_4byte_addr_mode = st_micron_set_4byte_addr_mode;
+
+	/*
+	 * mt25qu doesn't support all possible write protocols for erase, only
+	 * 1-1-0, 2-2-0, 4-4-0.
+	 */
+	nor->erase_proto = SNOR_PROTO_1_1_1;
 }
 
 static const struct spi_nor_fixups micron_st_fixups = {
-- 
2.10.2