[U-Boot] [PATH v3 1/2] sf: Add status register reading support

[Simon Glass]

Hi Jagannadha

On Thu, Jan 3, 2013 at 6:51 AM, Jagannadha Sutradharudu Teki
<jagannadh.teki at gmail.com> wrote:
> 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.

Do you have a console command for this, and the control register also?

Regards,
Simon

>
> Signed-off-by: Jagannadha Sutradharudu Teki <jagannadh.teki at gmail.com>
> ---
> Changes in v3:
>         improved coding style
>
>  drivers/mtd/spi/spi_flash.c          |    8 ++++++++
>  drivers/mtd/spi/spi_flash_internal.h |    3 +++
>  2 files changed, 11 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
> index 9e8939c..0f05b91 100644
> --- a/drivers/mtd/spi/spi_flash.c
> +++ b/drivers/mtd/spi/spi_flash.c
> @@ -264,6 +264,14 @@ 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;
> +
> +       cmd = CMD_READ_STATUS;
> +       return spi_flash_read_common(flash, &cmd, sizeof(cmd), (void *)data, 1);
> +}
> +
>  /*
>   * 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.
> --
> 1.7.0.4
>
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