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 jaganna@xilinx.com --- Changes for v4: - none Changes for v3: - none Changes for v2: - none
drivers/mtd/spi/spi_flash_ops.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)
diff --git a/drivers/mtd/spi/spi_flash_ops.c b/drivers/mtd/spi/spi_flash_ops.c index 59127f8..2f87801 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; }
+static 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 static int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel) {