Commit 6cba6fdf96f13a0533187b9c16608d9ca44add40
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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>
Showing 1 changed file with 24 additions and 0 deletions Side-by-side Diff
drivers/mtd/spi/sf_ops.c
| ... | ... | @@ -38,6 +38,30 @@ |
| 38 | 38 | return 0; |
| 39 | 39 | } |
| 40 | 40 | |
| 41 | +static int spi_flash_cmd_write_config(struct spi_flash *flash, u8 cr) | |
| 42 | +{ | |
| 43 | + u8 data[2]; | |
| 44 | + u8 cmd; | |
| 45 | + int ret; | |
| 46 | + | |
| 47 | + cmd = CMD_READ_STATUS; | |
| 48 | + ret = spi_flash_read_common(flash, &cmd, 1, &data[0], 1); | |
| 49 | + if (ret < 0) { | |
| 50 | + debug("SF: fail to read status register\n"); | |
| 51 | + return ret; | |
| 52 | + } | |
| 53 | + | |
| 54 | + cmd = CMD_WRITE_STATUS; | |
| 55 | + data[1] = cr; | |
| 56 | + ret = spi_flash_write_common(flash, &cmd, 1, &data, 2); | |
| 57 | + if (ret) { | |
| 58 | + debug("SF: fail to write config register\n"); | |
| 59 | + return ret; | |
| 60 | + } | |
| 61 | + | |
| 62 | + return 0; | |
| 63 | +} | |
| 64 | + | |
| 41 | 65 | #ifdef CONFIG_SPI_FLASH_BAR |
| 42 | 66 | static int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel) |
| 43 | 67 | { |