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sf: Flash power up read-only based on idcode0

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Using macro's for flash power up read-only access code
leads wrong behaviour hence use idcode0 for runtime
detection, hence the flash which require this functionality
gets detected at runtime.

Tested-by: Jagan Teki <jteki@openedev.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Jagan Teki <jteki@openedev.com>
This commit is contained in:
Jagan Teki 2015-09-30 02:01:23 +05:30
parent cb37518516
commit 6f9d670d8e
2 changed files with 4 additions and 4 deletions
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1
drivers/mtd/spi/sf_internal.h
View File

@ -66,6 +66,7 @@ enum spi_nor_option_flags {
#define SPI_FLASH_CFI_MFR_MACRONIX 0xc2
#define SPI_FLASH_CFI_MFR_SST 0xbf
#define SPI_FLASH_CFI_MFR_WINBOND 0xef
#define SPI_FLASH_CFI_MFR_ATMEL 0x1f
/* Erase commands */
#define CMD_ERASE_4K 0x20

7
drivers/mtd/spi/sf_ops.c
View File

@ -941,11 +941,10 @@ int spi_flash_scan(struct spi_slave *spi, struct spi_flash *flash)
}
/* 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)
if (idcode[0] == SPI_FLASH_CFI_MFR_ATMEL ||
idcode[0] == SPI_FLASH_CFI_MFR_MACRONIX ||
idcode[0] == SPI_FLASH_CFI_MFR_SST)
write_sr(flash, 0);
#endif
/* Assign spi data */
flash->spi = spi;