linux-kernel - [PATCH 1/2] mtd: spi-nor: core: add manufacturer flags

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Message-Id: <20240925074903.1983601-2-erezgeva@nwtime.org>
Date: Wed, 25 Sep 2024 09:49:02 +0200
From: Erez Geva <erezgeva@...ime.org>
To: linux-mtd@...ts.infradead.org,
	Tudor Ambarus <tudor.ambarus@...aro.org>,
	Pratyush Yadav <pratyush@...nel.org>,
	Michael Walle <mwalle@...nel.org>
Cc: linux-kernel@...r.kernel.org,
	Miquel Raynal <miquel.raynal@...tlin.com>,
	Richard Weinberger <richard@....at>,
	Vignesh Raghavendra <vigneshr@...com>,
	Esben Haabendal <esben@...nix.com>,
	Erez Geva <ErezGeva2@...il.com>
Subject: [PATCH 1/2] mtd: spi-nor: core: add manufacturer flags

From: Erez Geva <ErezGeva2@...il.com>

Add flag for always trying reading SFDP.
Some vendors reuse all JEDEC IDs on manufacture table
 with new chips that support SFDP.

In this patch series we use the new flags with Macronix.

Signed-off-by: Erez Geva <ErezGeva2@...il.com>
---
 drivers/mtd/spi-nor/core.c | 9 +++++----
 drivers/mtd/spi-nor/core.h | 4 ++++
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 9d6e85bf227b..d77a356d6f40 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -2891,10 +2891,11 @@ static void spi_nor_init_params_deprecated(struct spi_nor *nor)
 
 	spi_nor_manufacturer_init_params(nor);
 
-	if (nor->info->no_sfdp_flags & (SPI_NOR_DUAL_READ |
-					SPI_NOR_QUAD_READ |
-					SPI_NOR_OCTAL_READ |
-					SPI_NOR_OCTAL_DTR_READ))
+	if ((nor->info->no_sfdp_flags & (SPI_NOR_DUAL_READ |
+					 SPI_NOR_QUAD_READ |
+					 SPI_NOR_OCTAL_READ |
+					 SPI_NOR_OCTAL_DTR_READ)) ||
+	     nor->manufacturer->flags & SPI_NOR_MANUFACT_TRY_SFDP)
 		spi_nor_sfdp_init_params_deprecated(nor);
 }
 
diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h
index 1516b6d0dc37..9237c4ed66cd 100644
--- a/drivers/mtd/spi-nor/core.h
+++ b/drivers/mtd/spi-nor/core.h
@@ -560,12 +560,16 @@ struct flash_info {
  * @parts: array of parts supported by this manufacturer
  * @nparts: number of entries in the parts array
  * @fixups: hooks called at various points in time during spi_nor_scan()
+ * @flags: manufacturer flags
  */
 struct spi_nor_manufacturer {
 	const char *name;
 	const struct flash_info *parts;
 	unsigned int nparts;
 	const struct spi_nor_fixups *fixups;
+
+	u8 flags;
+#define SPI_NOR_MANUFACT_TRY_SFDP	BIT(0)
 };
 
 /**
-- 
2.39.5