linux-kernel - [PATCH v4 2/3] mtd: spinand: add spinand_read

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Date:   Fri, 28 May 2021 16:16:38 +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 v4 2/3] mtd: spinand: add spinand_read_cfg() helper

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

Put REG_CFG reading code in spinand_read_cfg().
This function will be needed by the future SPI-NAND resume ops.

Signed-off-by: Patrice Chotard <patrice.chotard@...s.st.com>
---
Changes in v4:
  - None

 drivers/mtd/nand/spi/core.c | 26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index 1f39a38fbf69..58945f0ae839 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -138,20 +138,13 @@ int spinand_select_target(struct spinand_device *spinand, unsigned int target)
 	return 0;
 }
 
-static int spinand_init_cfg_cache(struct spinand_device *spinand)
+static int spinand_read_cfg(struct spinand_device *spinand)
 {
 	struct nand_device *nand = spinand_to_nand(spinand);
-	struct device *dev = &spinand->spimem->spi->dev;
+
 	unsigned int target;
 	int ret;
 
-	spinand->cfg_cache = devm_kcalloc(dev,
-					  nand->memorg.ntargets,
-					  sizeof(*spinand->cfg_cache),
-					  GFP_KERNEL);
-	if (!spinand->cfg_cache)
-		return -ENOMEM;
-
 	for (target = 0; target < nand->memorg.ntargets; target++) {
 		ret = spinand_select_target(spinand, target);
 		if (ret)
@@ -170,6 +163,21 @@ static int spinand_init_cfg_cache(struct spinand_device *spinand)
 	return 0;
 }
 
+static int spinand_init_cfg_cache(struct spinand_device *spinand)
+{
+	struct nand_device *nand = spinand_to_nand(spinand);
+	struct device *dev = &spinand->spimem->spi->dev;
+
+	spinand->cfg_cache = devm_kcalloc(dev,
+					  nand->memorg.ntargets,
+					  sizeof(*spinand->cfg_cache),
+					  GFP_KERNEL);
+	if (!spinand->cfg_cache)
+		return -ENOMEM;
+
+	return spinand_read_cfg(spinand);
+}
+
 static int spinand_init_quad_enable(struct spinand_device *spinand)
 {
 	bool enable = false;
-- 
2.17.1