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45 lines
1.2 KiB
Diff
45 lines
1.2 KiB
Diff
From 207662a9270cc542709fbab0d25fbc361b39748c Mon Sep 17 00:00:00 2001
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From: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
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Date: Wed, 7 Nov 2012 15:13:49 +0100
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Subject: sf: macronix: add support for 4-byte address mode
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Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
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--- a/drivers/mtd/spi/macronix.c
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+++ b/drivers/mtd/spi/macronix.c
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@@ -35,6 +35,8 @@
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#include "spi_flash_internal.h"
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+#define MX25XX_EN4B 0xb7 /* Enter 4-byte mode */
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+
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struct macronix_spi_flash_params {
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u16 idcode;
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u16 nr_blocks;
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@@ -79,6 +81,13 @@ static const struct macronix_spi_flash_p
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},
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};
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+static __maybe_unused int macronix_set_4byte_mode(struct spi_flash *flash)
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+{
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+ struct spi_slave *spi = flash->spi;
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+
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+ return spi_flash_cmd(spi, MX25XX_EN4B, NULL, 0);
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+}
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+
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int spi_flash_probe_macronix(struct spi_flash *flash, u8 *idcode)
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{
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const struct macronix_spi_flash_params *params;
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@@ -106,6 +115,11 @@ int spi_flash_probe_macronix(struct spi_
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flash->sector_size = 256 * 16 * 16;
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flash->size = flash->sector_size * params->nr_blocks;
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+#ifdef CONFIG_SPI_FLASH_4BYTE_MODE
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+ if (flash->size > (1 << 24))
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+ flash->set_4byte_mode = macronix_set_4byte_mode;
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+#endif
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+
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/* Clear BP# bits for read-only flash */
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spi_flash_cmd_write_status(flash, 0);
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