From: Guennadi Liakhovetski Date: Wed, 18 Jan 2012 09:14:25 +0000 (+0100) Subject: dma: sh_dma: not all SH DMAC implementations support MEMCPY X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e9c8d7a03e69093e4c33c5056a45c1233a42e8a4;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git dma: sh_dma: not all SH DMAC implementations support MEMCPY Add a flag to allow platforms to specify, whether a DMAC instance supports the MEMCPY operation. To avoid regressions, preserve the current default. Signed-off-by: Guennadi Liakhovetski Acked-by: Paul Mundt Signed-off-by: Vinod Koul --- diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c index 54043cd831c8..812fd76e9c18 100644 --- a/drivers/dma/shdma.c +++ b/drivers/dma/shdma.c @@ -1262,7 +1262,8 @@ static int __init sh_dmae_probe(struct platform_device *pdev) INIT_LIST_HEAD(&shdev->common.channels); - dma_cap_set(DMA_MEMCPY, shdev->common.cap_mask); + if (!pdata->slave_only) + dma_cap_set(DMA_MEMCPY, shdev->common.cap_mask); if (pdata->slave && pdata->slave_num) dma_cap_set(DMA_SLAVE, shdev->common.cap_mask); diff --git a/include/linux/sh_dma.h b/include/linux/sh_dma.h index 8cd7fe59cf1a..425450b980b8 100644 --- a/include/linux/sh_dma.h +++ b/include/linux/sh_dma.h @@ -70,6 +70,7 @@ struct sh_dmae_pdata { unsigned int needs_tend_set:1; unsigned int no_dmars:1; unsigned int chclr_present:1; + unsigned int slave_only:1; }; /* DMA register */