dmaengine: shdma: add .needs_tend_set / .no_dmars flags

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
index 6a21cd843ab..0f3ec8d57a7 100644
--- a/drivers/dma/shdma.c
+++ b/drivers/dma/shdma.c
@@ -194,6 +194,9 @@ static void dmae_start(struct sh_dmae_chan *sh_chan)
         struct sh_dmae_device *shdev = to_sh_dev(sh_chan);
         u32 chcr = chcr_read(sh_chan);
 
+        if (shdev->pdata->needs_tend_set)
+                sh_dmae_writel(sh_chan, 0xFFFFFFFF, TEND);
+
         chcr |= CHCR_DE | shdev->chcr_ie_bit;
         chcr_write(sh_chan, chcr & ~CHCR_TE);
 }
@@ -242,6 +245,9 @@ static int dmae_set_dmars(struct sh_dmae_chan *sh_chan, u16 val)
         if (dmae_is_busy(sh_chan))
                 return -EBUSY;
 
+        if (pdata->no_dmars)
+                return 0;
+
         /* in the case of a missing DMARS resource use first memory window */
         if (!addr)
                 addr = (u16 __iomem *)shdev->chan_reg;