On Wed, 3 Oct 2018 22:26:03 +0530
Vignesh R <[email protected]> wrote:
> Cadence OSPI controller IP supports Octal IO (x8 IO lines),
> It also has an integrated PHY. IP register layout is very
> similar to existing QSPI IP except for additional bits to support Octal
> and Octal DDR mode. Therefore, extend current driver to support Octal
> mode.
>
> Signed-off-by: Vignesh R <[email protected]>
> ---
> drivers/mtd/spi-nor/cadence-quadspi.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/drivers/mtd/spi-nor/cadence-quadspi.c
> b/drivers/mtd/spi-nor/cadence-quadspi.c
> index e24db817154e..48b00e75a879 100644
> --- a/drivers/mtd/spi-nor/cadence-quadspi.c
> +++ b/drivers/mtd/spi-nor/cadence-quadspi.c
> @@ -101,6 +101,7 @@ struct cqspi_st {
> #define CQSPI_INST_TYPE_SINGLE 0
> #define CQSPI_INST_TYPE_DUAL 1
> #define CQSPI_INST_TYPE_QUAD 2
> +#define CQSPI_INST_TYPE_OCTAL 3
>
> #define CQSPI_DUMMY_CLKS_PER_BYTE 8
> #define CQSPI_DUMMY_BYTES_MAX 4
> @@ -898,6 +899,9 @@ static int cqspi_set_protocol(struct spi_nor *nor, const
> int read)
> case SNOR_PROTO_1_1_4:
> f_pdata->data_width = CQSPI_INST_TYPE_QUAD;
> break;
> + case SNOR_PROTO_1_1_8:
> + f_pdata->data_width = CQSPI_INST_TYPE_OCTAL;
> + break;
> default:
> return -EINVAL;
> }
> @@ -1205,6 +1209,7 @@ static int cqspi_setup_flash(struct cqspi_st *cqspi,
> struct device_node *np)
> SNOR_HWCAPS_READ_FAST |
> SNOR_HWCAPS_READ_1_1_2 |
> SNOR_HWCAPS_READ_1_1_4 |
> + SNOR_HWCAPS_READ_1_1_8 |
Is this really supported on qspi versions of this IP? I guess not given
the description in the commit message and the name of the new
compatible (ospi instead of qspi).
> SNOR_HWCAPS_PP,
> };
> struct platform_device *pdev = cqspi->pdev;
> @@ -1456,6 +1461,10 @@ static const struct of_device_id cqspi_dt_ids[] = {
> .compatible = "ti,k2g-qspi",
> .data = (void *)CQSPI_NEEDS_WR_DELAY,
> },
> + {
> + .compatible = "ti,am654-ospi",
> + .data = (void *)CQSPI_NEEDS_WR_DELAY,
> + },
> { /* end of table */ }
> };
>
