linux-kernel - [PATCH v5 2/3] mtd: spinand: Add spinand_init

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Date:   Wed, 2 Jun 2021 11:49:12 +0200
From:   <patrice.chotard@...s.st.com>
To:     Mark Brown <broonie@...nel.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Boris Brezillon <boris.brezillon@...labora.com>,
        <linux-mtd@...ts.infradead.org>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        <linux-spi@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, Pratyush Yadav <p.yadav@...com>
CC:     <patrice.chotard@...s.st.com>, <christophe.kerello@...s.st.com>
Subject: [PATCH v5 2/3] mtd: spinand: Add spinand_init_flash() helper

From: Patrice Chotard <patrice.chotard@...s.st.com>

Add spinand_init_flash() helper which implement
all needed init for future SPI-NAND resume ops.

Signed-off-by: Patrice Chotard <patrice.chotard@...s.st.com>
---
Changes in v5:
  - Add spinand_read_cfg() call in spinand_init_flash()

Changes in v4:
  - None

 drivers/mtd/nand/spi/core.c | 74 ++++++++++++++++++++++---------------
 1 file changed, 45 insertions(+), 29 deletions(-)

diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index ab0fff6feaa7..12dfa75eec28 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -1081,12 +1081,55 @@ static int spinand_detect(struct spinand_device *spinand)
 	return 0;
 }
 
+static int spinand_init_flash(struct spinand_device *spinand)
+{
+	struct device *dev = &spinand->spimem->spi->dev;
+	struct nand_device *nand = spinand_to_nand(spinand);
+	int ret, i;
+
+	ret = spinand_read_cfg(spinand);
+	if (ret)
+		return ret;
+
+	ret = spinand_init_quad_enable(spinand);
+	if (ret)
+		return ret;
+
+	ret = spinand_upd_cfg(spinand, CFG_OTP_ENABLE, 0);
+	if (ret)
+		return ret;
+
+	ret = spinand_manufacturer_init(spinand);
+	if (ret) {
+		dev_err(dev,
+		"Failed to initialize the SPI NAND chip (err = %d)\n",
+		ret);
+		return ret;
+	}
+
+	/* After power up, all blocks are locked, so unlock them here. */
+	for (i = 0; i < nand->memorg.ntargets; i++) {
+		ret = spinand_select_target(spinand, i);
+		if (ret)
+			break;
+
+		ret = spinand_lock_block(spinand, BL_ALL_UNLOCKED);
+		if (ret)
+			break;
+	}
+
+	if (ret)
+		spinand_manufacturer_cleanup(spinand);
+
+	return ret;
+}
+
 static int spinand_init(struct spinand_device *spinand)
 {
 	struct device *dev = &spinand->spimem->spi->dev;
 	struct mtd_info *mtd = spinand_to_mtd(spinand);
 	struct nand_device *nand = mtd_to_nanddev(mtd);
-	int ret, i;
+	int ret;
 
 	/*
 	 * We need a scratch buffer because the spi_mem interface requires that
@@ -1119,26 +1162,10 @@ static int spinand_init(struct spinand_device *spinand)
 	if (ret)
 		goto err_free_bufs;
 
-	ret = spinand_read_cfg(spinand);
-	if (ret)
-		goto err_free_bufs;
-
-	ret = spinand_init_quad_enable(spinand);
-	if (ret)
-		goto err_free_bufs;
-
-	ret = spinand_upd_cfg(spinand, CFG_OTP_ENABLE, 0);
+	ret = spinand_init_flash(spinand);
 	if (ret)
 		goto err_free_bufs;
 
-	ret = spinand_manufacturer_init(spinand);
-	if (ret) {
-		dev_err(dev,
-			"Failed to initialize the SPI NAND chip (err = %d)\n",
-			ret);
-		goto err_free_bufs;
-	}
-
 	ret = spinand_create_dirmaps(spinand);
 	if (ret) {
 		dev_err(dev,
@@ -1147,17 +1174,6 @@ static int spinand_init(struct spinand_device *spinand)
 		goto err_manuf_cleanup;
 	}
 
-	/* After power up, all blocks are locked, so unlock them here. */
-	for (i = 0; i < nand->memorg.ntargets; i++) {
-		ret = spinand_select_target(spinand, i);
-		if (ret)
-			goto err_manuf_cleanup;
-
-		ret = spinand_lock_block(spinand, BL_ALL_UNLOCKED);
-		if (ret)
-			goto err_manuf_cleanup;
-	}
-
 	ret = nanddev_init(nand, &spinand_ops, THIS_MODULE);
 	if (ret)
 		goto err_manuf_cleanup;
-- 
2.17.1