This patch provides support to read a flash status register.
Status register contains a control bits used to verify the progress of flash program and erase operations.
User need to get the data through spi_flash_cmd_read_status() based on their usage.
Signed-off-by: Jagannadha Sutradharudu Teki jagannadh.teki@gmail.com --- Changes in v2:none
drivers/mtd/spi/spi_flash.c | 15 +++++++++++++++ drivers/mtd/spi/spi_flash_internal.h | 3 +++ 2 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c index 9e8939c..bf5ec4a 100644 --- a/drivers/mtd/spi/spi_flash.c +++ b/drivers/mtd/spi/spi_flash.c @@ -264,6 +264,21 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr) return 0; }
+int spi_flash_cmd_read_status(struct spi_flash *flash, void *data) +{ + u8 cmd; + int ret; + + cmd = CMD_READ_STATUS; + ret = spi_flash_read_common(flash, &cmd, sizeof(cmd), (void *)data, 1); + if (ret < 0) { + debug("SF: fail to read status register\n"); + return ret; + } + + return 0; +} + /* * The following table holds all device probe functions * diff --git a/drivers/mtd/spi/spi_flash_internal.h b/drivers/mtd/spi/spi_flash_internal.h index 141cfa8..8232595 100644 --- a/drivers/mtd/spi/spi_flash_internal.h +++ b/drivers/mtd/spi/spi_flash_internal.h @@ -77,6 +77,9 @@ 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);
+/* Read the status register */ +int spi_flash_cmd_read_status(struct spi_flash *flash, void *data); + /* * Same as spi_flash_cmd_read() except it also claims/releases the SPI * bus. Used as common part of the ->read() operation.