Commit f8435bef authored by Claudiu Beznea's avatar Claudiu Beznea Committed by Vinod Koul

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: e1f7c9ee ("dmaengine: at_xdmac: creation of the atmel eXtended DMA Controller driver")
Signed-off-by: default avatarClaudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20230214151827.1050280-6-claudiu.beznea@microchip.comSigned-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 7c5eb63d
......@@ -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);
......@@ -2224,6 +2226,7 @@ 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();
if (atxdmac->save_gs & atchan->mask)
at_xdmac_write(atxdmac, AT_XDMAC_GE, atchan->mask);
}
}
......
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