On Wed, Apr 08, 2015 at 11:45:42AM -0500, Felipe Balbi wrote:
> Add missing directions, residue_granularity,
> srd_addr_widths and dst_addr_widths bitfields.
>
> Without those we will see a kernel WARN()
> when loading musb on am335x devices.
I have applied this and will send to Linus as well
--
~Vinod
>
> Signed-off-by: Felipe Balbi
> ---
>
> retested with AM335x BeagleBone Black
>
> drivers/dma/cppi41.c | 9 +
> 1 file changed, 9 insertions(+)
>
> diff --git a/drivers/dma/cppi41.c b/drivers/dma/cppi41.c
> index 512cb8e2805e..ceedafbd23e0 100644
> --- a/drivers/dma/cppi41.c
> +++ b/drivers/dma/cppi41.c
> @@ -903,6 +903,11 @@ static const struct cppi_glue_infos
> *get_glue_info(struct device *dev)
> return of_id->data;
> }
>
> +#define CPPI41_DMA_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \
> + BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \
> + BIT(DMA_SLAVE_BUSWIDTH_3_BYTES) | \
> + BIT(DMA_SLAVE_BUSWIDTH_4_BYTES))
> +
> static int cppi41_dma_probe(struct platform_device *pdev)
> {
> struct cppi41_dd *cdd;
> @@ -926,6 +931,10 @@ static int cppi41_dma_probe(struct platform_device *pdev)
> cdd->ddev.device_issue_pending = cppi41_dma_issue_pending;
> cdd->ddev.device_prep_slave_sg = cppi41_dma_prep_slave_sg;
> cdd->ddev.device_terminate_all = cppi41_stop_chan;
> + cdd->ddev.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
> + cdd->ddev.src_addr_widths = CPPI41_DMA_BUSWIDTHS;
> + cdd->ddev.dst_addr_widths = CPPI41_DMA_BUSWIDTHS;
> + cdd->ddev.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
> cdd->ddev.dev = dev;
> INIT_LIST_HEAD(&cdd->ddev.channels);
> cpp41_dma_info.dma_cap = cdd->ddev.cap_mask;
> --
> 2.3.0
>
--
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