linux-kernel - [PATCH 1/3] include/linux/mtd/spinand.h: Add fixups for spinand

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Message-Id: <20240710011541.342682-2-linchengming884@gmail.com>
Date: Wed, 10 Jul 2024 09:15:39 +0800
From: Cheng Ming Lin <linchengming884@...il.com>
To: miquel.raynal@...tlin.com,
	vigneshr@...com,
	linux-mtd@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Cc: richard@....at,
	alvinzhou@...c.com.tw,
	leoyu@...c.com.tw,
	Cheng Ming Lin <chengminglin@...c.com.tw>
Subject: [PATCH 1/3] include/linux/mtd/spinand.h: Add fixups for spinand

From: Cheng Ming Lin <chengminglin@...c.com.tw>

Add struct spi_nand_fixups as SPI NAND fixup hooks.

To determine whether the Plane Select bit should be
inserted into the column address in core.c, add the
member struct spinand_info to struct spinand_device
to ascertain whether the device has fixups.

Signed-off-by: Cheng Ming Lin <chengminglin@...c.com.tw>
---
 include/linux/mtd/spinand.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h
index 5c19ead60499..c079c6ac1541 100644
--- a/include/linux/mtd/spinand.h
+++ b/include/linux/mtd/spinand.h
@@ -354,6 +354,7 @@ struct spinand_info {
 	} op_variants;
 	int (*select_target)(struct spinand_device *spinand,
 			     unsigned int target);
+	const struct spi_nand_fixups *fixups;
 };
 
 #define SPINAND_ID(__method, ...)					\
@@ -379,6 +380,9 @@ struct spinand_info {
 #define SPINAND_SELECT_TARGET(__func)					\
 	.select_target = __func,
 
+#define SPINAND_PLANE_SELECT_BIT(__func)					\
+	.fixups = __func,
+
 #define SPINAND_INFO(__model, __id, __memorg, __eccreq, __op_variants,	\
 		     __flags, ...)					\
 	{								\
@@ -398,6 +402,18 @@ struct spinand_dirmap {
 	struct spi_mem_dirmap_desc *rdesc_ecc;
 };
 
+/**
+ * struct spi_nand_fixups - SPI NAND fixup hooks
+ * @write_to_cache: program load requires Plane Select bit in CADD.
+ * @read_from_cache: read from cache requires Plane Select bit in CADD.
+ */
+struct spi_nand_fixups {
+	unsigned int (*write_to_cache)(struct spinand_device *spinand,
+				const struct nand_page_io_req *req, unsigned int column);
+	u16 (*read_from_cache)(struct spinand_device *spinand,
+				const struct nand_page_io_req *req, u16 column);
+};
+
 /**
  * struct spinand_device - SPI NAND device instance
  * @base: NAND device instance
@@ -449,6 +465,7 @@ struct spinand_device {
 	u8 *databuf;
 	u8 *oobbuf;
 	u8 *scratchbuf;
+	const struct spinand_info *info;
 	const struct spinand_manufacturer *manufacturer;
 	void *priv;
 };
-- 
2.25.1