diff options
| author | Claudiu Beznea <claudiu.beznea@microchip.com> | 2023-02-14 18:18:25 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-05-11 17:03:37 +0300 |
| commit | 6107896806a66d05cbaa9eb32b2e6f522856ceb1 (patch) | |
| tree | 565353d0d2198102339e3c4987981de408a25c72 /drivers/dma | |
| parent | a8c24a80de0096bce04db90271635ece9d30b5bf (diff) | |
| download | linux-6107896806a66d05cbaa9eb32b2e6f522856ceb1.tar.xz | |
dmaengine: at_xdmac: do not enable all cyclic channels
[ Upstream commit f8435befd81dd85b7b610598551fadf675849bc1 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/dma')
| -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 d6c9781cd46a..bfc8ae214395 100644 --- a/drivers/dma/at_xdmac.c +++ b/drivers/dma/at_xdmac.c @@ -243,6 +243,7 @@ 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[]; @@ -1988,6 +1989,7 @@ 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); clk_disable_unprepare(atxdmac->clk); @@ -2027,7 +2029,8 @@ 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); } } return 0; |