mtd: spi-nor: Introduce spi_nor_set_mtd_info()

Used to init all the mtd_info fields. Move the mtd_info init
the last thing in the spi_nor_scan(), so that we avoid superfluous
initialization of the mtd_info fields in case of errors.

While here use common naming scheme for functions that are setting
mtd_info fields:
s/spi_nor_register_locking_ops/spi_nor_set_mtd_locking_ops
s/spi_nor_otp_init/spi_nor_set_mtd_otp_ops
The functions names are self explanatory, get rid of the comment
for the OTP function.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Reviewed-by: Michael Walle <michael@walle.cc>
Reviewed-by: Pratyush Yadav <p.yadav@ti.com>
Link: https://lore.kernel.org/r/20211207140254.87681-4-tudor.ambarus@microchip.com

1 files changed, 31 insertions, 25 deletions

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 5b9c827d411c..dbb2c98c0366 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -3080,6 +3080,35 @@ static const struct flash_info *spi_nor_get_flash_info(struct spi_nor *nor,
 	return info;
 }
 
+static void spi_nor_set_mtd_info(struct spi_nor *nor)
+{
+	struct mtd_info *mtd = &nor->mtd;
+	struct device *dev = nor->dev;
+
+	spi_nor_set_mtd_locking_ops(nor);
+	spi_nor_set_mtd_otp_ops(nor);
+
+	mtd->dev.parent = dev;
+	if (!mtd->name)
+		mtd->name = dev_name(dev);
+	mtd->type = MTD_NORFLASH;
+	mtd->flags = MTD_CAP_NORFLASH;
+	if (nor->info->flags & SPI_NOR_NO_ERASE)
+		mtd->flags |= MTD_NO_ERASE;
+	mtd->writesize = nor->params->writesize;
+	mtd->writebufsize = nor->params->page_size;
+	mtd->size = nor->params->size;
+	mtd->_erase = spi_nor_erase;
+	mtd->_read = spi_nor_read;
+	/* Might be already set by some SST flashes. */
+	if (!mtd->_write)
+		mtd->_write = spi_nor_write;
+	mtd->_suspend = spi_nor_suspend;
+	mtd->_resume = spi_nor_resume;
+	mtd->_get_device = spi_nor_get_device;
+	mtd->_put_device = spi_nor_put_device;
+}
+
 int spi_nor_scan(struct spi_nor *nor, const char *name,
 		 const struct spi_nor_hwcaps *hwcaps)
 {
@@ -3134,26 +3163,11 @@ int spi_nor_scan(struct spi_nor *nor, const char *name,
 	if (info->flags & SPI_NOR_HAS_LOCK)
 		nor->flags |= SNOR_F_HAS_LOCK;
 
-	mtd->_write = spi_nor_write;
-
 	/* Init flash parameters based on flash_info struct and SFDP */
 	ret = spi_nor_init_params(nor);
 	if (ret)
 		return ret;
 
-	if (!mtd->name)
-		mtd->name = dev_name(dev);
-	mtd->type = MTD_NORFLASH;
-	mtd->writesize = nor->params->writesize;
-	mtd->flags = MTD_CAP_NORFLASH;
-	mtd->size = nor->params->size;
-	mtd->_erase = spi_nor_erase;
-	mtd->_read = spi_nor_read;
-	mtd->_suspend = spi_nor_suspend;
-	mtd->_resume = spi_nor_resume;
-	mtd->_get_device = spi_nor_get_device;
-	mtd->_put_device = spi_nor_put_device;
-
 	if (info->flags & USE_FSR)
 		nor->flags |= SNOR_F_USE_FSR;
 	if (info->flags & SPI_NOR_HAS_TB) {
@@ -3175,12 +3189,6 @@ int spi_nor_scan(struct spi_nor *nor, const char *name,
 			nor->flags |= SNOR_F_HAS_SR_BP3_BIT6;
 	}
 
-	if (info->flags & SPI_NOR_NO_ERASE)
-		mtd->flags |= MTD_NO_ERASE;
-
-	mtd->dev.parent = dev;
-	mtd->writebufsize = nor->params->page_size;
-
 	if (of_property_read_bool(np, "broken-flash-reset"))
 		nor->flags |= SNOR_F_BROKEN_RESET;
 
@@ -3204,15 +3212,13 @@ int spi_nor_scan(struct spi_nor *nor, const char *name,
 	if (ret)
 		return ret;
 
-	spi_nor_register_locking_ops(nor);
-
 	/* Send all the required SPI flash commands to initialize device */
 	ret = spi_nor_init(nor);
 	if (ret)
 		return ret;
 
-	/* Configure OTP parameters and ops */
-	spi_nor_otp_init(nor);
+	/* No mtd_info fields should be used up to this point. */
+	spi_nor_set_mtd_info(nor);
 
 	dev_info(dev, "%s (%lld Kbytes)\n", info->name,
 			(long long)mtd->size >> 10);