From: Tudor Ambarus <tudor.ambarus@microchip.com>
Date: Sat, 2 Nov 2019 11:23:34 +0000
Subject: mtd: spi-nor: Move the WE and wait calls inside Write SR methods
Git-commit: 718dd9e69f7c4558f72f5d68583bbf51d46a4d4b
Patch-mainline: v5.5-rc1
References: jsc#SLE-14214 jsc#SLE-16606

Avoid duplicating code by moving the calls to spi_nor_write_enable() and
spi_nor_wait_till_ready() inside the Write Status Register methods.

Move spi_nor_write_sr() to avoid forward declaration of
spi_nor_wait_till_ready().

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
---
 drivers/mtd/spi-nor/spi-nor.c | 108 ++++++++++++++--------------------
 1 file changed, 44 insertions(+), 64 deletions(-)

diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index f3b4b28f65cc..88893bd70568 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -534,35 +534,6 @@ static int spi_nor_read_cr(struct spi_nor *nor, u8 *cr)
 	return ret;
 }
 
-/*
- * Write status register 1 byte
- * Returns negative if error occurred.
- */
-static int spi_nor_write_sr(struct spi_nor *nor, u8 val)
-{
-	int ret;
-
-	nor->bouncebuf[0] = val;
-	if (nor->spimem) {
-		struct spi_mem_op op =
-			SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_WRSR, 1),
-				   SPI_MEM_OP_NO_ADDR,
-				   SPI_MEM_OP_NO_DUMMY,
-				   SPI_MEM_OP_DATA_OUT(1, nor->bouncebuf, 1));
-
-		ret = spi_mem_exec_op(nor->spimem, &op);
-	} else {
-		ret = nor->controller_ops->write_reg(nor, SPINOR_OP_WRSR,
-						     nor->bouncebuf, 1);
-	}
-
-	if (ret)
-		dev_dbg(nor->dev, "error %d writing SR\n", ret);
-
-	return ret;
-
-}
-
 static int macronix_set_4byte(struct spi_nor *nor, bool enable)
 {
 	int ret;
@@ -853,6 +824,41 @@ static int spi_nor_wait_till_ready(struct spi_nor *nor)
 						    DEFAULT_READY_WAIT_JIFFIES);
 }
 
+/*
+ * Write status register 1 byte
+ * Returns negative if error occurred.
+ */
+static int spi_nor_write_sr(struct spi_nor *nor, u8 val)
+{
+	int ret;
+
+	nor->bouncebuf[0] = val;
+
+	ret = spi_nor_write_enable(nor);
+	if (ret)
+		return ret;
+
+	if (nor->spimem) {
+		struct spi_mem_op op =
+			SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_WRSR, 1),
+				   SPI_MEM_OP_NO_ADDR,
+				   SPI_MEM_OP_NO_DUMMY,
+				   SPI_MEM_OP_DATA_OUT(1, nor->bouncebuf, 1));
+
+		ret = spi_mem_exec_op(nor->spimem, &op);
+	} else {
+		ret = nor->controller_ops->write_reg(nor, SPINOR_OP_WRSR,
+						     nor->bouncebuf, 1);
+	}
+
+	if (ret) {
+		dev_dbg(nor->dev, "error %d writing SR\n", ret);
+		return ret;
+	}
+
+	return spi_nor_wait_till_ready(nor);
+}
+
 /*
  * Write status Register and configuration register with 2 bytes
  * The first byte will be written to the status register, while the
@@ -895,18 +901,10 @@ static int spi_nor_write_sr_and_check(struct spi_nor *nor, u8 status_new,
 {
 	int ret;
 
-	ret = spi_nor_write_enable(nor);
-	if (ret)
-		return ret;
-
 	ret = spi_nor_write_sr(nor, status_new);
 	if (ret)
 		return ret;
 
-	ret = spi_nor_wait_till_ready(nor);
-	if (ret)
-		return ret;
-
 	ret = spi_nor_read_sr(nor, nor->bouncebuf);
 	if (ret)
 		return ret;
@@ -918,6 +916,10 @@ static int spi_nor_write_sr2(struct spi_nor *nor, const u8 *sr2)
 {
 	int ret;
 
+	ret = spi_nor_write_enable(nor);
+	if (ret)
+		return ret;
+
 	if (nor->spimem) {
 		struct spi_mem_op op =
 			SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_WRSR2, 1),
@@ -931,10 +933,12 @@ static int spi_nor_write_sr2(struct spi_nor *nor, const u8 *sr2)
 						     sr2, 1);
 	}
 
-	if (ret)
+	if (ret) {
 		dev_dbg(nor->dev, "error %d writing SR2\n", ret);
+		return ret;
+	}
 
-	return ret;
+	return spi_nor_wait_till_ready(nor);
 }
 
 static int spi_nor_read_sr2(struct spi_nor *nor, u8 *sr2)
@@ -1864,18 +1868,10 @@ static int macronix_quad_enable(struct spi_nor *nor)
 	if (nor->bouncebuf[0] & SR_QUAD_EN_MX)
 		return 0;
 
-	ret = spi_nor_write_enable(nor);
-	if (ret)
-		return ret;
-
 	ret = spi_nor_write_sr(nor, nor->bouncebuf[0] | SR_QUAD_EN_MX);
 	if (ret)
 		return ret;
 
-	ret = spi_nor_wait_till_ready(nor);
-	if (ret)
-		return ret;
-
 	ret = spi_nor_read_sr(nor, nor->bouncebuf);
 	if (ret)
 		return ret;
@@ -2041,18 +2037,10 @@ static int sr2_bit7_quad_enable(struct spi_nor *nor)
 	/* Update the Quad Enable bit. */
 	*sr2 |= SR2_QUAD_EN_BIT7;
 
-	ret = spi_nor_write_enable(nor);
-	if (ret)
-		return ret;
-
 	ret = spi_nor_write_sr2(nor, sr2);
 	if (ret)
 		return ret;
 
-	ret = spi_nor_wait_till_ready(nor);
-	if (ret)
-		return ret;
-
 	/* Read back and check it. */
 	ret = spi_nor_read_sr2(nor, sr2);
 	if (ret)
@@ -2084,15 +2072,7 @@ static int spi_nor_clear_sr_bp(struct spi_nor *nor)
 	if (ret)
 		return ret;
 
-	ret = spi_nor_write_enable(nor);
-	if (ret)
-		return ret;
-
-	ret = spi_nor_write_sr(nor, nor->bouncebuf[0] & ~mask);
-	if (ret)
-		return ret;
-
-	return spi_nor_wait_till_ready(nor);
+	return spi_nor_write_sr(nor, nor->bouncebuf[0] & ~mask);
 }
 
 /**
-- 
2.28.0