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| author | Rabin Vincent <rabin.vincent@stericsson.com> | 2011-12-28 11:27:40 +0530 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@linux.intel.com> | 2012-01-02 16:42:44 +0530 |
| commit | e9f3a49c9698da6f6b606d5e048ddce308438763 (patch) | |
| tree | 37e3e7ce0501054fa1669709c6e941c9cd115cad /drivers | |
| parent | 8730790b971d747dd4508d22fbc1a4f9422c2803 (diff) | |
| download | linux-e9f3a49c9698da6f6b606d5e048ddce308438763.tar.gz linux-e9f3a49c9698da6f6b606d5e048ddce308438763.tar.bz2 linux-e9f3a49c9698da6f6b606d5e048ddce308438763.zip | |
dmaengine/ste_dma40: clear LNK on channel startup
Otherwise if a previously physical channel is used as a logical channel, the
LNK may have old values which affect the operation of the logical channel since
the LNK register has different semantics between physical and logical channels.
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com>
Signed-off-by: Narayanan G <narayanan.gopalakrishnan@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/dma/ste_dma40.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index 972dc35770f9..cc5ecbc067a3 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -1104,6 +1104,10 @@ static void d40_config_write(struct d40_chan *d40c) /* Set LIDX for lcla */ writel(lidx, chanbase + D40_CHAN_REG_SSELT); writel(lidx, chanbase + D40_CHAN_REG_SDELT); + + /* Clear LNK which will be used by d40_chan_has_events() */ + writel(0, chanbase + D40_CHAN_REG_SSLNK); + writel(0, chanbase + D40_CHAN_REG_SDLNK); } } |