On Mon, 10 Dec 2018 16:49:29 +0530
Vignesh R <vigneshr@xxxxxx> wrote:
> On 10/12/18 2:15 PM, Boris Brezillon wrote:
> > On Wed, 3 Oct 2018 22:26:03 +0530
> > Vignesh R <vigneshr@xxxxxx> 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 <vigneshr@xxxxxx>
> >> ---
> >> 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).
>
> No, qspi version does not support Octal mode. I guess you are pointing
> out its logically wrong for driver with "*-qspi" compatible to declare
> SNOR_HWCAPS_READ_1_1_8 capability.
Exactly.
> Will update patch to declare SNOR_HWCAPS_READ_1_1_8 based on compatible.
Thanks.
