diff options
| author | Claudiu Beznea <claudiu.beznea@microchip.com> | 2023-02-14 16:18:25 +0100 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-04-12 19:48:44 +0200 |
| commit | f8435befd81dd85b7b610598551fadf675849bc1 (patch) | |
| tree | bc765cd4d536c42a3d3f3a106946d4ac2d58a34b /drivers/dma/at_xdmac.c | |
| parent | dmaengine: at_xdmac: restore the content of grws register (diff) | |
| download | linux-f8435befd81dd85b7b610598551fadf675849bc1.tar.xz linux-f8435befd81dd85b7b610598551fadf675849bc1.zip | |
dmaengine: at_xdmac: do not enable all cyclic channels
Do not global enable all the cyclic channels in at_xdmac_resume(). Instead
save the global status in at_xdmac_suspend() and re-enable the cyclic
channel only if it was active before suspend.
Fixes: e1f7c9eee707 ("dmaengine: at_xdmac: creation of the atmel eXtended DMA Controller driver")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20230214151827.1050280-6-claudiu.beznea@microchip.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/at_xdmac.c')
| -rw-r--r-- | drivers/dma/at_xdmac.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c index 34c004a4b23c..96f1b69f8a75 100644 --- a/drivers/dma/at_xdmac.c +++ b/drivers/dma/at_xdmac.c @@ -246,6 +246,7 @@ struct at_xdmac { int irq; struct clk *clk; u32 save_gim; + u32 save_gs; struct dma_pool *at_xdmac_desc_pool; const struct at_xdmac_layout *layout; struct at_xdmac_chan chan[]; @@ -2162,6 +2163,7 @@ static int __maybe_unused atmel_xdmac_suspend(struct device *dev) } } atxdmac->save_gim = at_xdmac_read(atxdmac, AT_XDMAC_GIM); + atxdmac->save_gs = at_xdmac_read(atxdmac, AT_XDMAC_GS); at_xdmac_off(atxdmac, false); pm_runtime_mark_last_busy(atxdmac->dev); @@ -2224,7 +2226,8 @@ static int __maybe_unused atmel_xdmac_resume(struct device *dev) at_xdmac_chan_write(atchan, AT_XDMAC_CNDC, atchan->save_cndc); at_xdmac_chan_write(atchan, AT_XDMAC_CIE, atchan->save_cim); wmb(); - at_xdmac_write(atxdmac, AT_XDMAC_GE, atchan->mask); + if (atxdmac->save_gs & atchan->mask) + at_xdmac_write(atxdmac, AT_XDMAC_GE, atchan->mask); } } |