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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>
hifive-unleashed-5.1
Jonas Aaberg 2010-08-09 12:08:02 +00:00 committed by Dan Williams
parent 1b00348d5d
commit b55912c66a
1 changed files with 16 additions and 30 deletions
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46
drivers/dma/ste_dma40.c
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@ -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;