DMAENGINE: ste_dma40: Code clean-up and removed an unneeded suspend request

This patch cleans up some code and removes a suspend request that was pointless
since the hw was never configured nor running when it was called.

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 538c35d05a57f28afdbddff56b41177534873fec..1adaebf497747e8db561cb3a066816f5a3363ecb 100644 (file)
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -652,29 +652,10 @@ static u32 d40_chan_has_events(struct d40_chan *d40c)
        return val;
 }
 
-static void d40_config_enable_lidx(struct d40_chan *d40c)
-{
-       /* Set LIDX for lcla */
-       writel((d40c->phy_chan->num << D40_SREG_ELEM_LOG_LIDX_POS) &
-              D40_SREG_ELEM_LOG_LIDX_MASK,
-              d40c->base->virtbase + D40_DREG_PCBASE +
-              d40c->phy_chan->num * D40_DREG_PCDELTA + D40_CHAN_REG_SDELT);
-
-       writel((d40c->phy_chan->num << D40_SREG_ELEM_LOG_LIDX_POS) &
-              D40_SREG_ELEM_LOG_LIDX_MASK,
-              d40c->base->virtbase + D40_DREG_PCBASE +
-              d40c->phy_chan->num * D40_DREG_PCDELTA + D40_CHAN_REG_SSELT);
-}
-
-static int d40_config_write(struct d40_chan *d40c)
+static void d40_config_write(struct d40_chan *d40c)
 {
        u32 addr_base;
        u32 var;
-       int res;
-
-       res = d40_channel_execute_command(d40c, D40_DMA_SUSPEND_REQ);
-       if (res)
-               return res;
 
        /* Odd addresses are even addresses + 4 */
        addr_base = (d40c->phy_chan->num % 2) * 4;
@@ -700,9 +681,20 @@ static int d40_config_write(struct d40_chan *d40c)
                       d40c->phy_chan->num * D40_DREG_PCDELTA +
                       D40_CHAN_REG_SDCFG);
 
-               d40_config_enable_lidx(d40c);
+               /* Set LIDX for lcla */
+               writel((d40c->phy_chan->num << D40_SREG_ELEM_LOG_LIDX_POS) &
+                      D40_SREG_ELEM_LOG_LIDX_MASK,
+                      d40c->base->virtbase + D40_DREG_PCBASE +
+                      d40c->phy_chan->num * D40_DREG_PCDELTA +
+                      D40_CHAN_REG_SDELT);
+
+               writel((d40c->phy_chan->num << D40_SREG_ELEM_LOG_LIDX_POS) &
+                      D40_SREG_ELEM_LOG_LIDX_MASK,
+                      d40c->base->virtbase + D40_DREG_PCBASE +
+                      d40c->phy_chan->num * D40_DREG_PCDELTA +
+                      D40_CHAN_REG_SSELT);
+
        }
-       return res;
 }
 
 static void d40_desc_load(struct d40_chan *d40c, struct d40_desc *d40d)
@@ -1730,14 +1722,8 @@ static int d40_alloc_chan_resources(struct dma_chan *chan)
         * resource is free. In case of multiple logical channels
         * on the same physical resource, only the first write is necessary.
         */
-       if (is_free_phy) {
-               err = d40_config_write(d40c);
-               if (err) {
-                       dev_err(&d40c->chan.dev->device,
-                               "[%s] Failed to configure channel\n",
-                               __func__);
-               }
-       }
+       if (is_free_phy)
+               d40_config_write(d40c);
 fail:
        spin_unlock_irqrestore(&d40c->lock, flags);
        return err;