Messages in this thread | | | Date | Tue, 25 Aug 2015 12:24:53 +0530 | From | Vignesh R <> | Subject | Re: [PATCH] spi: ti-qspi: use 128 bit transfer mode for writing to flash |
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On 08/20/2015 11:25 PM, Mark Brown wrote: > On Thu, Aug 20, 2015 at 04:00:59PM +0530, Vignesh R wrote: > >> - writeb(*txbuf, qspi->base + QSPI_SPI_DATA_REG); >> + if (count >= QSPI_WLEN_MAX_BYTES) { >> + u32 *txp = (u32 *)txbuf; >> + >> + data = cpu_to_be32(*txp++); >> + writel(data, qspi->base + >> + QSPI_SPI_DATA_REG_3); >> + data = cpu_to_be32(*txp++); >> + writel(data, qspi->base + >> + QSPI_SPI_DATA_REG_2); >> + data = cpu_to_be32(*txp++); >> + writel(data, qspi->base + >> + QSPI_SPI_DATA_REG_1); >> + data = cpu_to_be32(*txp++); >> + writel(data, qspi->base + >> + QSPI_SPI_DATA_REG); >> + xfer_len = QSPI_WLEN_MAX_BYTES; >> + cmd |= QSPI_WLEN(QSPI_WLEN_MAX_BITS); >> + } else { >> + writeb(*txbuf, qspi->base + QSPI_SPI_DATA_REG); >> + cmd = qspi->cmd | QSPI_WR_SNGL; >> + xfer_len = wlen; >> + cmd |= QSPI_WLEN(wlen); >> + } > > It's a bit sad that this isn't able to do a Duff's device type thing and > only kicks in for the full 128 bit FIFO size, it looks like it could do > any number of words. >
Yes, any number of bytes can be transfered (max 16 bytes). I will try to work on your suggestion. Thanks!
-- Regards Vignesh
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