[PATCH v6 20/21] mtd: spinand: Add a ->configure_chip() hook

[Mikhail Kshevetskiy]

From: Miquel Raynal <miquel.raynal at bootlin.com>

There is already a manufacturer hook, which is manufacturer specific but
not chip specific. We no longer have access to the actual NAND identity
at this stage so let's add a per-chip configuration hook to align the
chip configuration (if any) with the core's setting.

This is a port of linux commit
da55809ebb45 ("mtd: spinand: Add a ->configure_chip() hook")

Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy at iopsys.eu> # U-Boot port
---
 drivers/mtd/nand/spi/core.c | 16 ++++++++++++++--
 include/linux/mtd/spinand.h |  7 +++++++
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index 3e21a06dd0f..25e7a38a874 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -1251,8 +1251,19 @@ static int spinand_id_detect(struct spinand_device *spinand)
 
 static int spinand_manufacturer_init(struct spinand_device *spinand)
 {
-	if (spinand->manufacturer->ops->init)
-		return spinand->manufacturer->ops->init(spinand);
+	int ret;
+
+	if (spinand->manufacturer->ops->init) {
+		ret = spinand->manufacturer->ops->init(spinand);
+		if (ret)
+			return ret;
+	}
+
+	if (spinand->configure_chip) {
+		ret = spinand->configure_chip(spinand);
+		if (ret)
+			return ret;
+	}
 
 	return 0;
 }
@@ -1363,6 +1374,7 @@ 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->configure_chip = table[i].configure_chip;
 		spinand->set_cont_read = table[i].set_cont_read;
 		spinand->fact_otp = &table[i].fact_otp;
 		spinand->user_otp = &table[i].user_otp;
diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h
index adfb5f3ffbc..94f324741e0 100644
--- a/include/linux/mtd/spinand.h
+++ b/include/linux/mtd/spinand.h
@@ -398,6 +398,7 @@ struct spinand_user_otp {
  * @op_variants.update_cache: variants of the update-cache operation
  * @select_target: function used to select a target/die. Required only for
  *		   multi-die chips
+ * @configure_chip: Align the chip configuration with the core settings
  * @set_cont_read: enable/disable continuous cached reads
  * @fact_otp: SPI NAND factory OTP info.
  * @user_otp: SPI NAND user OTP info.
@@ -421,6 +422,7 @@ struct spinand_info {
 	} op_variants;
 	int (*select_target)(struct spinand_device *spinand,
 			     unsigned int target);
+	int (*configure_chip)(struct spinand_device *spinand);
 	int (*set_cont_read)(struct spinand_device *spinand,
 			     bool enable);
 	struct spinand_fact_otp fact_otp;
@@ -453,6 +455,9 @@ struct spinand_info {
 #define SPINAND_SELECT_TARGET(__func)					\
 	.select_target = __func,
 
+#define SPINAND_CONFIGURE_CHIP(__configure_chip)			\
+	.configure_chip = __configure_chip
+
 #define SPINAND_CONT_READ(__set_cont_read)				\
 	.set_cont_read = __set_cont_read,
 
@@ -521,6 +526,7 @@ 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
+ * @configure_chip: Align the chip configuration with the core settings
  * @cont_read_possible: Field filled by the core once the whole system
  *		configuration is known to tell whether continuous reads are
  *		suitable to use or not in general with this chip/configuration.
@@ -569,6 +575,7 @@ struct spinand_device {
 
 	u8 last_wait_status;
 
+	int (*configure_chip)(struct spinand_device *spinand);
 	bool cont_read_possible;
 	int (*set_cont_read)(struct spinand_device *spinand,
 			     bool enable);
-- 
2.50.1