On Monday, August 17, 2015 at 12:32:54 PM, Jagan Teki wrote:
> This patch adds flag status register reading support to
> spi_flash_cmd_wait_ready.
>
> Signed-off-by: Jagan Teki <jt...@openedev.com>
> Cc: Simon Glass <s...@chromium.org>
> Cc: Marek Vasut <ma...@denx.de>
> Cc: Michal Simek <michal.si...@xilinx.com>
> Cc: Siva Durga Prasad Paladugu <siva...@xilinx.com>
> Cc: Stefan Roese <s...@denx.de>
> Cc: Tom Warren <twar...@nvidia.com>
> Cc: Bin Meng <bmeng...@gmail.com>
> Cc: Tom Rini <tr...@konsulko.com>
> Cc: Hou Zhiqiang <b48...@freescale.com>
> Tested-by: Jagan Teki <jt...@openedev.com>
> ---
> drivers/mtd/spi/sf_internal.h | 1 +
> drivers/mtd/spi/sf_ops.c | 66
> +++++++++++++++++++++++++++++++++++++++---- drivers/mtd/spi/sf_probe.c
> | 4 +--
> include/spi_flash.h | 2 --
> 4 files changed, 62 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/mtd/spi/sf_internal.h b/drivers/mtd/spi/sf_internal.h
> index e97c716..4ecfd0c 100644
> --- a/drivers/mtd/spi/sf_internal.h
> +++ b/drivers/mtd/spi/sf_internal.h
> @@ -49,6 +49,7 @@ enum {
>
> enum spi_nor_option_flags {
> SNOR_F_SST_WR = (1 << 0),
> + SNOR_F_USE_FSR = (1 << 1),
> };
>
> #define SPI_FLASH_3B_ADDR_LEN 3
> diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c
> index 7d7c264..a5487ad 100644
> --- a/drivers/mtd/spi/sf_ops.c
> +++ b/drivers/mtd/spi/sf_ops.c
> @@ -40,6 +40,21 @@ int spi_flash_cmd_read_status(struct spi_flash *flash,
> u8 *rs) return 0;
> }
>
> +static int read_fsr(struct spi_flash *flash, u8 *fsr)
> +{
> + int ret;
> + u8 cmd;
> +
> + cmd = CMD_FLAG_STATUS;
> + ret = spi_flash_read_common(flash, &cmd, 1, fsr, 1);
> + if (ret < 0) {
> + debug("SF: fail to read flag status register\n");
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> int spi_flash_cmd_write_status(struct spi_flash *flash, u8 ws)
> {
> u8 cmd;
> @@ -138,24 +153,63 @@ static void spi_flash_dual_flash(struct spi_flash
> *flash, u32 *addr) }
> #endif
>
> +static inline int spi_flash_sr_ready(struct spi_flash *flash)
> +{
> + u8 sr;
> + int ret;
> +
> + ret = spi_flash_cmd_read_status(flash, &sr);
> + if (ret < 0)
> + return ret;
> +
> + if (sr < 0)
Have you ever seen u8 value that's < 0 ? :-)
> + return sr;
> + else
> + return !(sr & STATUS_WIP);
> +}
[...]
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