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| author | Jagannadha Sutradharudu Teki <jaganna@xilinx.com> | 2013-12-23 15:47:48 +0530 |
|---|---|---|
| committer | Jagannadha Sutradharudu Teki <jaganna@xilinx.com> | 2014-01-11 15:13:25 +0530 |
| commit | 6cba6fdf96f13a0533187b9c16608d9ca44add40 (patch) | |
| tree | c3d994d378456df00480cefebce49e95d44e6b6c /drivers/mtd | |
| parent | 3163aaa63fced54bbd6fd190ece0f89b473076ab (diff) | |
| download | talos-obmc-uboot-6cba6fdf96f13a0533187b9c16608d9ca44add40.tar.gz talos-obmc-uboot-6cba6fdf96f13a0533187b9c16608d9ca44add40.zip | |
sf: ops: Add configuration register writing support
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.
Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/spi/sf_ops.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c index 3d304ce6ac..39e06ecae0 100644 --- a/drivers/mtd/spi/sf_ops.c +++ b/drivers/mtd/spi/sf_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) { |
