[U-Boot] [PATCH v4 16/21] sf: Flash power up read-only based on idcode0

[Jagan Teki]

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.

Signed-off-by: Jagan Teki <jteki at openedev.com>
---
Changes for v4, v3, v2:
	- none

 drivers/mtd/spi/sf_internal.h | 2 ++
 drivers/mtd/spi/sf_ops.c      | 7 +++----
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/spi/sf_internal.h b/drivers/mtd/spi/sf_internal.h
index 8ef88f4..39749c2 100644
--- a/drivers/mtd/spi/sf_internal.h
+++ b/drivers/mtd/spi/sf_internal.h
@@ -64,7 +64,9 @@ enum spi_nor_option_flags {
 #define SPI_FLASH_CFI_MFR_SPANSION	0x01
 #define SPI_FLASH_CFI_MFR_STMICRO	0x20
 #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
diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c
index f63ce7a..f90f041 100644
--- a/drivers/mtd/spi/sf_ops.c
+++ b/drivers/mtd/spi/sf_ops.c
@@ -748,11 +748,10 @@ 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;
-- 
1.9.1