Please ignore this patch. I have posted a new patch as a fix after the discussion with Jonas Gorski.
https://patchwork.kernel.org/patch/6636761/ spi: img-spfi: fix support for speeds up to 1/4th input clock Thanks, Sifan > -----Original Message----- > From: Sifan Naeem > Sent: 17 June 2015 11:48 > To: broo...@kernel.org > Cc: linux-...@vger.kernel.org; linux-kernel@vger.kernel.org; > abres...@chromium.org; Sifan Naeem > Subject: [PATCH v3] spi: img-spfi: Same Edge bit set to double supported > transfer speed > > Same edge bit set in SPFI Control register to double the supported spfi clock > speed. Setting this bit increases the supported spfi frequency from 1/8 to 1/4 > of the core clock frequency. > > Without this bit set the maximum speed supported was 25MHz on Pistachio. > > Signed-off-by: Sifan Naeem <sifan.na...@imgtec.com> > --- > changes from v2: Gerrit Change-Id removed from commit message > drivers/spi/spi-img-spfi.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/spi/spi-img-spfi.c b/drivers/spi/spi-img-spfi.c index > 788e2b1..acce90a 100644 > --- a/drivers/spi/spi-img-spfi.c > +++ b/drivers/spi/spi-img-spfi.c > @@ -40,6 +40,7 @@ > #define SPFI_CONTROL_SOFT_RESET BIT(11) > #define SPFI_CONTROL_SEND_DMA BIT(10) > #define SPFI_CONTROL_GET_DMA BIT(9) > +#define SPFI_CONTROL_SE BIT(8) > #define SPFI_CONTROL_TMODE_SHIFT 5 > #define SPFI_CONTROL_TMODE_MASK 0x7 > #define SPFI_CONTROL_TMODE_SINGLE 0 > @@ -491,6 +492,7 @@ static void img_spfi_config(struct spi_master > *master, struct spi_device *spi, > else if (xfer->tx_nbits == SPI_NBITS_QUAD && > xfer->rx_nbits == SPI_NBITS_QUAD) > val |= SPFI_CONTROL_TMODE_QUAD << > SPFI_CONTROL_TMODE_SHIFT; > + val |= SPFI_CONTROL_SE; > spfi_writel(spfi, val, SPFI_CONTROL); > } > > -- > 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
