iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

clk: mvebu: armada-37xx-periph: change suspend/resume time

Browse Source 
Armada 3700 PCIe IP relies on the PCIe clock managed by this
driver. For reasons related to the PCI core's organization when
suspending/resuming, PCI host controller drivers must reconfigure
their registers at suspend_noirq()/resume_noirq() which happens after
suspend()/suspend_late() and before resume_early()/resume().

Device link support in the clock framework enforce that the clock
driver's resume() callback will be called before the PCIe
driver's. But, any resume_noirq() callback will be called before all
the registered resume() callbacks.

The solution to support PCIe resume operation is to change the
"priority" of this clock driver PM callbacks to "_noirq()".

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lkml.kernel.org/r/20190627125245.26788-3-miquel.raynal@bootlin.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Miquel Raynal 2019-06-27 14:52:43 +02:00 committed by Stephen Boyd
parent 4d8fb49484
commit e7ea59b6dc
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/clk/mvebu/armada-37xx-periph.c
View File

@ -714,8 +714,8 @@ static int __maybe_unused armada_3700_periph_clock_resume(struct device *dev)
}
static const struct dev_pm_ops armada_3700_periph_clock_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(armada_3700_periph_clock_suspend,
armada_3700_periph_clock_resume)
SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(armada_3700_periph_clock_suspend,
armada_3700_periph_clock_resume)
};
static int armada_3700_periph_clock_probe(struct platform_device *pdev)