linux-toradex.git/drivers/hsi, branch v4.9.16

HSI: omap_ssi: drop pm_runtime_irq_safe

2016-06-27T22:40:08+00:00

pm_runtime_irq_safe increases the parents runtime usage
counter effectively keeping the OMAP SoC from idling.

Signed-off-by: Sebastian Reichel 
Acked-by: Tony Lindgren 
Tested-by: Pavel Machek

HSI: omap_ssi_port: use rpm autosuspend API

2016-06-27T22:40:03+00:00

Instead of immediately sending the SSI module to
sleep, wait some time in case of new incoming or
outgoing traffic.

Signed-off-by: Sebastian Reichel 
Tested-by: Pavel Machek

HSI: omap_ssi: call msg->complete() from process context

2016-06-27T22:40:00+00:00

msg->complete() should always be called from process context once
irq_safe runtime pm flag is no longer set for omap-ssi.

Signed-off-by: Sebastian Reichel 
Tested-by: Pavel Machek

HSI: omap_ssi_port: ensure clocks are kept enabled during transfer

2016-06-27T22:39:56+00:00

ensure, that clocks remain enabled, when a transfer is started.

Signed-off-by: Sebastian Reichel 
Tested-by: Pavel Machek

HSI: omap_ssi_port: replace pm_runtime_put_sync with non-sync variant

2016-06-27T22:39:43+00:00

There is no need to wait for hardware to really reach idle states,
so just release runtime PM asynchronously.

Signed-off-by: Sebastian Reichel 
Tested-by: Pavel Machek

HSI: omap_ssi_port: avoid calling runtime_pm_*_sync inside spinlock

2016-06-27T22:39:39+00:00

runtime_pm_*_sync can block when irq_safe flag is removed
from omap-ssi driver, so it may not be called while a
spinlock is held.

Signed-off-by: Sebastian Reichel 
Tested-by: Pavel Machek

HSI: omap_ssi_port: avoid pm_runtime_get_sync in ssi_start_dma and ssi_start_pio

2016-06-27T22:39:36+00:00

These functions may be called from atomic context,
so avoid synchronous runtime pm calls.

Signed-off-by: Sebastian Reichel 
Tested-by: Pavel Machek

HSI: omap_ssi_port: switch to threaded pio irq

2016-06-27T22:39:32+00:00

Move pio interrupt handler from tasklet into thread to
allow runtime_pm_get_sync calls without irq_safe being
set.

Signed-off-by: Sebastian Reichel 
Tested-by: Pavel Machek

HSI: omap_ssi_core: remove pm_runtime_get_sync call from tasklet

2016-06-27T22:39:26+00:00

We may not call pm_runtime_get_sync() from tasklet, since
it can block once pm_runtime_irq_safe is removed for omap-ssi.

Since irq can should only be created for a running device,
we assume, that the device is already running and use non-
synchronous API instead.

Signed-off-by: Sebastian Reichel 
Tested-by: Pavel Machek

HSI: omap_ssi_core: use pm_runtime_put instead of pm_runtime_put_sync

2016-06-27T22:39:21+00:00

There is no need to disable the device synchronously, so
don't do it.

Signed-off-by: Sebastian Reichel 
Tested-by: Pavel Machek