On 07/12/12 00:41, Thomas Abraham wrote:
> Add support for device based discovery.
>
> Signed-off-by: Thomas Abraham<[email protected]>
> Acked-by: Jaswinder Singh<[email protected]>
> Acked-by: Grant Likely<[email protected]>
> ---
> .../devicetree/bindings/spi/spi-samsung.txt | 113 ++++++++
> drivers/spi/spi-s3c64xx.c | 305
> +++++++++++++++++---
> 2 files changed, 378 insertions(+), 40 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/spi/spi-samsung.txt
>
[snip]
> @@ -989,49 +1057,166 @@ static void s3c64xx_spi_hwinit(struct
> s3c64xx_spi_driver_data *sdd, int channel)
> flush_fifo(sdd);
> }
>
> +static int __devinit s3c64xx_spi_get_dmares(
> + struct s3c64xx_spi_driver_data *sdd, bool tx)
> +{
> + struct platform_device *pdev = sdd->pdev;
> + struct s3c64xx_spi_dma_data *dma_data;
> + struct property *prop;
> + struct resource *res;
> + char prop_name[15], *chan_str;
> +
> + if (tx) {
> + dma_data =&sdd->tx_dma;
> + dma_data->direction = DMA_TO_DEVICE;
> + chan_str = "tx";
> + } else {
> + dma_data =&sdd->rx_dma;
> + dma_data->direction = DMA_FROM_DEVICE;
> + chan_str = "rx";
> + }
> +
> + if (!sdd->pdev->dev.of_node) {
> + res = platform_get_resource(pdev, IORESOURCE_DMA, tx ? 0 : 1);
> + if (!res) {
> + dev_err(&pdev->dev, "Unable to get SPI-%s dma "
> + "resource\n", chan_str);
> + return -ENXIO;
> + }
> + dma_data->dmach = res->start;
> + return 0;
> + }
> +
> + sprintf(prop_name, "%s-dma-channel", chan_str);
> + prop = of_find_property(pdev->dev.of_node, prop_name, NULL);
> + if (!prop) {
> + dev_err(&pdev->dev, "%s dma channel property not specified\n",
> + chan_str);
> + return -ENXIO;
> + }
> +
> + dma_data->dmach = DMACH_DT_PROP;
Thomas, the DMACH_DT_PROP is available only on pl330 now. So seems occur
following build error with s3c6400_defconfig.
drivers/spi/spi-s3c64xx.c: In function 's3c64xx_spi_get_dmares':
drivers/spi/spi-s3c64xx.c:1098: error: 'DMACH_DT_PROP' undeclared (first
use in this function)
drivers/spi/spi-s3c64xx.c:1098: error: (Each undeclared identifier is
reported only once
drivers/spi/spi-s3c64xx.c:1098: error: for each function it appears in.)
make[3]: *** [drivers/spi/spi-s3c64xx.o] Error 1
make[2]: *** [drivers/spi] Error 2
> + dma_data->dma_prop = prop;
> + return 0;
> +}
[snip]
Thanks.
Best regards,
Kgene.
--
Kukjin Kim <[email protected]>, Senior Engineer,
SW Solution Development Team, Samsung Electronics Co., Ltd.
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