Few of the flashes(Atmel, Macronix and SST) require to
clear BP# bits in flash power ups.
So clear these BP# bits at probe time, so-that the flash
is ready for user operations.
Signed-off-by: Jagannadha Sutradharudu Teki <jaga...@xilinx.com>
---
Changes for v5:
- Added macro for conditional compile
Changes for v4:
- none
Changes for v3:
- none
Changes for v2:
- none
drivers/mtd/spi/spi_flash_probe.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/mtd/spi/spi_flash_probe.c
b/drivers/mtd/spi/spi_flash_probe.c
index 199eab8..4659134 100644
--- a/drivers/mtd/spi/spi_flash_probe.c
+++ b/drivers/mtd/spi/spi_flash_probe.c
@@ -203,6 +203,13 @@ struct spi_flash *spi_flash_validate_ids(struct spi_slave
*spi, u8 *idcode)
flash->sector_size = params->sector_size;
flash->size = flash->sector_size * params->nr_sectors;
+ /* Flash powers up read-only, so clear BP# bits */
+#if defined(CONFIG_SPI_FLASH_ATMEL) || \
+ defined(CONFIG_SPI_FLASH_MACRONIX) || \
+ defined(CONFIG_SPI_FLASH_SST)
+ spi_flash_cmd_write_status(flash, 0);
+#endif
+
return flash;
}
--
1.8.3
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