linux-kernel - [PATCH v2 3/7] mtd: spi_nor: Move manufacturer quad_enable() in ->default

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Message-ID: <20190824120027.14452-4-tudor.ambarus@microchip.com>
Date:   Sat, 24 Aug 2019 12:00:41 +0000
From:   <Tudor.Ambarus@...rochip.com>
To:     <boris.brezillon@...labora.com>, <marek.vasut@...il.com>,
        <vigneshr@...com>, <miquel.raynal@...tlin.com>, <richard@....at>,
        <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
CC:     <Tudor.Ambarus@...rochip.com>
Subject: [PATCH v2 3/7] mtd: spi_nor: Move manufacturer quad_enable() in
 ->default_init()

From: Tudor Ambarus <tudor.ambarus@...rochip.com>

The goal is to move the quad_enable manufacturer specific init in the
nor->manufacturer->fixups->default_init()

The legacy quad_enable() implementation is spansion_quad_enable(),
select this method by default.

Set specific manufacturer fixups->default_init() hooks to overwrite
the default quad_enable() implementation when needed.

Signed-off-by: Tudor Ambarus <tudor.ambarus@...rochip.com>
---
 drivers/mtd/spi-nor/spi-nor.c | 48 ++++++++++++++++++++++++++-----------------
 1 file changed, 29 insertions(+), 19 deletions(-)

diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 27951e5a01e2..c9514dfd7d6d 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -4150,13 +4150,38 @@ static int spi_nor_parse_sfdp(struct spi_nor *nor,
 	return err;
 }
 
+static void macronix_set_default_init(struct spi_nor *nor)
+{
+	nor->params.quad_enable = macronix_quad_enable;
+}
+
+static void st_micron_set_default_init(struct spi_nor *nor)
+{
+	nor->params.quad_enable = NULL;
+}
+
 /**
  * spi_nor_manufacturer_init_params() - Initialize the flash's parameters and
- * settings based on ->default_init() hook.
+ * settings based on MFR register and ->default_init() hook.
  * @nor:	pointer to a 'struct spi-nor'.
  */
 static void spi_nor_manufacturer_init_params(struct spi_nor *nor)
 {
+	/* Init flash parameters based on MFR */
+	switch (JEDEC_MFR(nor->info)) {
+	case SNOR_MFR_MACRONIX:
+		macronix_set_default_init(nor);
+		break;
+
+	case SNOR_MFR_ST:
+	case SNOR_MFR_MICRON:
+		st_micron_set_default_init(nor);
+		break;
+
+	default:
+		break;
+	}
+
 	if (nor->info->fixups && nor->info->fixups->default_init)
 		nor->info->fixups->default_init(nor);
 }
@@ -4168,6 +4193,9 @@ static int spi_nor_init_params(struct spi_nor *nor)
 	const struct flash_info *info = nor->info;
 	u8 i, erase_mask;
 
+	/* Initialize legacy flash parameters and settings. */
+	params->quad_enable = spansion_quad_enable;
+
 	/* Set SPI NOR sizes. */
 	params->size = (u64)info->sector_size * info->n_sectors;
 	params->page_size = info->page_size;
@@ -4233,24 +4261,6 @@ static int spi_nor_init_params(struct spi_nor *nor)
 			       SPINOR_OP_SE);
 	spi_nor_init_uniform_erase_map(map, erase_mask, params->size);
 
-	/* Select the procedure to set the Quad Enable bit. */
-	if (params->hwcaps.mask & (SNOR_HWCAPS_READ_QUAD |
-				   SNOR_HWCAPS_PP_QUAD)) {
-		switch (JEDEC_MFR(info)) {
-		case SNOR_MFR_MACRONIX:
-			params->quad_enable = macronix_quad_enable;
-			break;
-
-		case SNOR_MFR_ST:
-		case SNOR_MFR_MICRON:
-			break;
-
-		default:
-			/* Kept only for backward compatibility purpose. */
-			params->quad_enable = spansion_quad_enable;
-			break;
-		}
-	}
 
 	spi_nor_manufacturer_init_params(nor);
 
-- 
2.9.5