@@ -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)
{
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(+)