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dmaengine: at_xdmac: do not enable all cyclic channels 

[ Upstream commit f8435befd8 ]

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: e1f7c9eee7 ("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>
This commit is contained in:
Claudiu Beznea 2023-02-14 17:18:25 +02:00 committed by Greg Kroah-Hartman
parent e073730ae6
commit 810003cea6
1 changed files with 4 additions and 1 deletions
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5
drivers/dma/at_xdmac.c
View File

@ -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;