openwrt/target/linux/mediatek/patches-5.15/436-drivers-mtd-spi-nor-Add-calibration-support-for-spi-.patch

From f3fe3b15eca7908eaac57f9b8387a5dbc45ec5b2 Mon Sep 17 00:00:00 2001
From: "SkyLake.Huang" <skylake.huang@mediatek.com>
Date: Thu, 23 Jun 2022 18:40:59 +0800
Subject: [PATCH 6/6] drivers: mtd: spi-nor: Add calibration support for
 spi-nor

Signed-off-by: SkyLake.Huang <skylake.huang@mediatek.com>
---
 drivers/mtd/nand/spi/core.c |  5 ++++-
 drivers/mtd/spi-nor/core.c  | 15 +++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -1018,7 +1018,10 @@ int spinand_cal_read(void *priv, u32 *ad
 	if (ret)
 		return ret;
 
-	ret = spinand_wait(spinand, &status);
+	ret = spinand_wait(spinand,
+			   SPINAND_READ_INITIAL_DELAY_US,
+			   SPINAND_READ_POLL_DELAY_US,
+			   &status);
 	if (ret < 0)
 		return ret;
 
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -3061,6 +3061,18 @@ static void spi_nor_debugfs_init(struct
 					 info->id_len, info->id);
 }
 
+static int spi_nor_cal_read(void *priv, u32 *addr, int addrlen, u8 *buf, int readlen)
+{
+	struct spi_nor *nor = (struct spi_nor *)priv;
+
+	nor->reg_proto = SNOR_PROTO_1_1_1;
+	nor->read_proto = SNOR_PROTO_1_1_1;
+	nor->read_opcode = SPINOR_OP_READ;
+	nor->read_dummy = 0;
+
+	return nor->controller_ops->read(nor, *addr, readlen, buf);
+}
+
 static const struct flash_info *spi_nor_get_flash_info(struct spi_nor *nor,
 						       const char *name)
 {
@@ -3134,6 +3146,9 @@ int spi_nor_scan(struct spi_nor *nor, co
 	if (!nor->bouncebuf)
 		return -ENOMEM;
 
+	if(nor->spimem)
+		spi_mem_do_calibration(nor->spimem, spi_nor_cal_read, nor);
+
 	info = spi_nor_get_flash_info(nor, name);
 	if (IS_ERR(info))
 		return PTR_ERR(info);