[PATCH v4 2/6] mtd: rawnand: add manufacturer fixup for ONFI parameter page

From: Chris Packham <chris.packham@alliedtelesis.co.nz>
To: miquel.raynal@bootlin.com, boris.brezillon@bootlin.com,
	dwmw2@infradead.org, computersforpeace@gmail.com,
	linux-mtd@lists.infradead.org
Cc: linux-kernel@vger.kernel.org,
	Chris Packham <chris.packham@alliedtelesis.co.nz>,
	Richard Weinberger <richard@nod.at>,
	Marek Vasut <marek.vasut@gmail.com>
Subject: [PATCH v4 2/6] mtd: rawnand: add manufacturer fixup for ONFI parameter page
Date: Thu, 21 Jun 2018 22:33:24 +1200	[thread overview]
Message-ID: <20180621103328.28206-3-chris.packham@alliedtelesis.co.nz> (raw)
In-Reply-To: <20180621103328.28206-1-chris.packham@alliedtelesis.co.nz>

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@bootlin.com>
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
---
Changes in v2:
- New
Changes in v3:
- Add doc comment and review from Boris
Changes in v4:
- None

 drivers/mtd/nand/raw/nand_base.c | 4 ++++
 include/linux/mtd/rawnand.h      | 3 +++
 2 files changed, 7 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..ef7e3b4e91ea 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -778,11 +778,14 @@ nand_get_sdr_timings(const struct nand_data_interface *conf)
  *	  implementation) if any.
  * @cleanup: the ->init() function may have allocated resources, ->cleanup()
  *	     is here to let vendor specific code release those resources.
+ * @fixup_onfi_param_page: apply vendor specific fixups to the ONFI
+ *	parameter page. This is called after the checksum is verified.
  */
 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

