On Wed, Jun 26, 2013 at 01:11:11PM +0530, Sourav Poddar wrote:
> +static int dra7xxx_qspi_prepare_xfer(struct spi_master *master)
> +{
> + return 0;
> +}
> +
> +static int dra7xxx_qspi_unprepare_xfer(struct spi_master *master)
> +{
> + return 0;
> +}
Remove empty functions, though...
> + if (flags & XFER_END)
> + dra7xxx_writel(qspi, qspi->cmd | QSPI_INVAL, QSPI_SPI_CMD_REG);
> +
> + pm_runtime_mark_last_busy(qspi->dev);
> + pm_runtime_put_autosuspend(qspi->dev);
...there's no point in doing this per-message, it should be in the
prepare and unprepare functions.
> + master = spi_alloc_master(&pdev->dev, sizeof(*qspi));
> + if (!master)
> + return -ENOMEM;
> +
> + master->mode_bits = SPI_CPOL | SPI_CPHA;
> +
> + master->num_chipselect = 1;
> + master->bus_num = -1;
> + master->setup = dra7xxx_qspi_setup;
> + master->prepare_transfer_hardware = dra7xxx_qspi_prepare_xfer;
> + master->transfer_one_message = dra7xxx_qspi_start_transfer_one;
> + master->unprepare_transfer_hardware = dra7xxx_qspi_unprepare_xfer;
> + master->dev.of_node = pdev->dev.of_node;
There should be some bits per word restrictions in here I think - it
looks like only 8 bits per word is supported.
> + qspi->base = devm_request_and_ioremap(&pdev->dev, r);
> + if (!qspi->base) {
> + dev_dbg(&pdev->dev, "can't ioremap MCSPI\n");
> + ret = -ENOMEM;
> + goto free_master;
> + }
Use devm_ioremap_resource().
> + if (!of_property_read_u32(np, "spi-max-frequency", &max_freq))
> + qspi->spi_max_frequency = max_freq;
You have OF bindings, there should be a binding document and an OF ID
table.
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