linux-kernel - [RFC PATCH v2 2/6] mtd: rawnand: add manufacturer fixup for ONFI parameter page

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Message-Id: <20180619053125.16792-3-chris.packham@alliedtelesis.co.nz>
Date:   Tue, 19 Jun 2018 17:31:21 +1200
From:   Chris Packham <chris.packham@...iedtelesis.co.nz>
To:     miquel.raynal@...tlin.com, boris.brezillon@...tlin.com,
        dwmw2@...radead.org, computersforpeace@...il.com,
        linux-mtd@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org,
        Chris Packham <chris.packham@...iedtelesis.co.nz>,
        Richard Weinberger <richard@....at>,
        Marek Vasut <marek.vasut@...il.com>
Subject: [RFC PATCH v2 2/6] mtd: rawnand: add manufacturer fixup for ONFI parameter page

This is called after the ONFI parameter page checksum is verified
and allows us to override the contents of the parameter page.

Suggested-by: Boris Brezillon <boris.brezillon@...tlin.com>
Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
---
Changes in v2:
- New

 drivers/mtd/nand/raw/nand_base.c | 4 ++++
 include/linux/mtd/rawnand.h      | 1 +
 2 files changed, 5 insertions(+)

diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 0cd3e216b95c..65250308c82d 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -5172,6 +5172,10 @@ static int nand_flash_detect_onfi(struct nand_chip *chip)
 		}
 	}
 
+	if (chip->manufacturer.desc && chip->manufacturer.desc->ops &&
+	    chip->manufacturer.desc->ops->fixup_onfi_param_page)
+		chip->manufacturer.desc->ops->fixup_onfi_param_page(chip, p);
+
 	/* Check version */
 	val = le16_to_cpu(p->revision);
 	if (val & (1 << 5))
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 3e8ec3b8a39c..6db42091ee5e 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -783,6 +783,7 @@ struct nand_manufacturer_ops {
 	void (*detect)(struct nand_chip *chip);
 	int (*init)(struct nand_chip *chip);
 	void (*cleanup)(struct nand_chip *chip);
+	void (*fixup_onfi_param_page)(struct nand_chip *chip, struct nand_onfi_params *p);
 };
 
 /**
-- 
2.17.1