diff options
Diffstat (limited to 'drivers/dma/dw/core.c')
| -rw-r--r-- | drivers/dma/dw/core.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c index 81b06dfd7e06..80e74216cd56 100644 --- a/drivers/dma/dw/core.c +++ b/drivers/dma/dw/core.c @@ -143,6 +143,7 @@ static void dwc_initialize(struct dw_dma_chan *dwc) struct dw_dma *dw = to_dw_dma(dwc->chan.device); u32 cfghi = DWC_CFGH_FIFO_MODE; u32 cfglo = DWC_CFGL_CH_PRIOR(dwc->priority); + bool hs_polarity = dwc->dws.hs_polarity; if (test_bit(DW_DMA_IS_INITIALIZED, &dwc->flags)) return; @@ -150,6 +151,9 @@ static void dwc_initialize(struct dw_dma_chan *dwc) cfghi |= DWC_CFGH_DST_PER(dwc->dws.dst_id); cfghi |= DWC_CFGH_SRC_PER(dwc->dws.src_id); + /* Set polarity of handshake interface */ + cfglo |= hs_polarity ? DWC_CFGL_HS_DST_POL | DWC_CFGL_HS_SRC_POL : 0; + channel_writel(dwc, CFG_LO, cfglo); channel_writel(dwc, CFG_HI, cfghi); |