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44 lines
1.1 KiB
44 lines
1.1 KiB
12 years ago
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From 37254e3284f61ea495f73a78b7c8efae983781e2 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 14:10:07 +0100
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Subject: sf: eon: 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/eon.c
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+++ b/drivers/mtd/spi/eon.c
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@@ -10,6 +10,8 @@
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#include "spi_flash_internal.h"
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+#define EN25XX_EN4B 0xb7 /* Enter 4-byte mode */
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+
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struct eon_spi_flash_params {
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u16 idcode;
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u16 nr_sectors;
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@@ -29,6 +31,13 @@ static const struct eon_spi_flash_params
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},
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};
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+static __maybe_unused int eon_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, EN25XX_EN4B, NULL, 0);
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+}
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+
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int spi_flash_probe_eon(struct spi_flash *flash, u8 *idcode)
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{
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const struct eon_spi_flash_params *params;
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@@ -57,5 +66,10 @@ int spi_flash_probe_eon(struct spi_flash
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flash->size = 256 * 16
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* params->nr_sectors;
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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 = eon_set_4byte_mode;
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+#endif
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+
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return 1;
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}
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