This patch provides support to program a flash config register. Configuration register contains the control bits used to configure the different configurations and security features of a device.
User need to set these bits through spi_flash_cmd_write_config() based on their usage. Signed-off-by: Jagannadha Sutradharudu Teki <jaga...@xilinx.com> --- Changes for v2: - none drivers/mtd/spi/spi_flash_internal.h | 3 +++ drivers/mtd/spi/spi_flash_ops.c | 24 ++++++++++++++++++++++++ 2 files changed, 27 insertions(+) diff --git a/drivers/mtd/spi/spi_flash_internal.h b/drivers/mtd/spi/spi_flash_internal.h index 286082a..580c06b 100644 --- a/drivers/mtd/spi/spi_flash_internal.h +++ b/drivers/mtd/spi/spi_flash_internal.h @@ -94,6 +94,9 @@ static inline int spi_flash_cmd_write_disable(struct spi_flash *flash) /* Program the status register. */ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr); +/* Program the config register */ +int spi_flash_cmd_write_config(struct spi_flash *flash, u8 cr); + #ifdef CONFIG_SPI_FLASH_BAR /* Program the bank address register */ int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel); diff --git a/drivers/mtd/spi/spi_flash_ops.c b/drivers/mtd/spi/spi_flash_ops.c index e461feb..c1c4465 100644 --- a/drivers/mtd/spi/spi_flash_ops.c +++ b/drivers/mtd/spi/spi_flash_ops.c @@ -38,6 +38,30 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr) return 0; } +int spi_flash_cmd_write_config(struct spi_flash *flash, u8 cr) +{ + u8 data[2]; + u8 cmd; + int ret; + + cmd = CMD_READ_STATUS; + ret = spi_flash_read_common(flash, &cmd, 1, &data[0], 1); + if (ret < 0) { + debug("SF: fail to read status register\n"); + return ret; + } + + cmd = CMD_WRITE_STATUS; + data[1] = cr; + ret = spi_flash_write_common(flash, &cmd, 1, &data, 2); + if (ret) { + debug("SF: fail to write config register\n"); + return ret; + } + + return 0; +} + #ifdef CONFIG_SPI_FLASH_BAR int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel) { -- 1.8.3 _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot