linux-kernel - [PATCH v3 10/17] mtd: spinand: Add pointer to probed flash's spinand

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Date:   Sat, 1 Jan 2022 13:12:43 +0530
From:   Apurva Nandan <a-nandan@...com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Mark Brown <broonie@...nel.org>,
        Apurva Nandan <a-nandan@...com>,
        Patrice Chotard <patrice.chotard@...s.st.com>,
        Christophe Kerello <christophe.kerello@...s.st.com>,
        Boris Brezillon <boris.brezillon@...labora.com>,
        Daniel Palmer <daniel@...f.com>,
        Alexander Lobakin <alobakin@...me>,
        <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <linux-spi@...r.kernel.org>
CC:     <p.yadav@...com>
Subject: [PATCH v3 10/17] mtd: spinand: Add pointer to probed flash's spinand_info

The data_ops_variants and ctrl_ops_variants defined in manufacturer's
code are required again when changing flash modes, because they hold
the op templates for the new protocol. It would be useful to have a
pointer to the device description entry i.e. probed flash's
spinand_info table in the spinand_device struct itself.

Signed-off-by: Apurva Nandan <a-nandan@...com>
---
 drivers/mtd/nand/spi/core.c | 1 +
 include/linux/mtd/spinand.h | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index 9688fdfc174e..1a602e4dd6bd 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -1107,6 +1107,7 @@ int spinand_match_and_init(struct spinand_device *spinand,
 		spinand->flags = table[i].flags;
 		spinand->id.len = 1 + table[i].devid.len;
 		spinand->select_target = table[i].select_target;
+		spinand->desc_entry = &table[i];
 
 		op = spinand_select_data_op_variant(spinand,
 					info->data_ops_variants.read_cache);
diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h
index ad924271a248..a8c071983a27 100644
--- a/include/linux/mtd/spinand.h
+++ b/include/linux/mtd/spinand.h
@@ -534,6 +534,8 @@ struct spinand_dirmap {
  *		passed in spi_mem_op be DMA-able, so we can't based the bufs on
  *		the stack
  * @manufacturer: SPI NAND manufacturer information
+ * @desc_entry: pointer to device description entry in the manufacturer's
+ *		spinand_info tables
  * @priv: manufacturer private data
  */
 struct spinand_device {
@@ -566,6 +568,7 @@ struct spinand_device {
 	u8 *oobbuf;
 	u8 *scratchbuf;
 	const struct spinand_manufacturer *manufacturer;
+	const struct spinand_info *desc_entry;
 	void *priv;
 };
 
-- 
2.25.1