linux-toradex.git/drivers/soc/rockchip, branch v4.10

soc: rockchip: power-domain: Handle errors from of_genpd_add_provider_onecell

2016-11-11T01:14:59+00:00

It was a bit surprising that the device was reported to have probed just
fine, but the provider hadn't been registered.

So handle any errors when registering the provider and fail the probe
accordingly.

Signed-off-by: Tomeu Vizoso 
Cc: Caesar Wang 
Signed-off-by: Heiko Stuebner

soc: rockchip: power-domain: use pm_genpd_remove in error cleanup

2016-11-11T01:14:59+00:00

The newly introduced pm_genpd_remove reverts the initialization done
by pm_genpd_init and is necessary in the error path of the rockchip
power-domain driver.

Without it the driver will in the error case cleanup the devm-allocated
structures including the elements referenced in the gpd_list thus making
deactivation of unused domains (and probably later genpd accesses as
well) fail by accessing invalid pointers.

Signed-off-by: Heiko Stuebner

soc: rockchip: power-domain: avoid infinite loop

2016-11-01T23:17:59+00:00

In some cases, we have met the infinite loop in
rockchip_pmu_set_idle_request() or rockchip_do_pmu_set_power_domain().

As the crosbug.com/p/57351 reported, the boot hangs right after this
[1.629163] bootconsole [uart8250] disabled
[1.639286] [drm:drm_core_init] Initialized drm 1.1.0 20060810
[1.645926] [drm:drm_get_platform_dev] Initialized vgem 1.0.0 20120112..
[1.654558] iommu: Adding device ff8f0000.vop to group 0
[1.660569] iommu: Adding device ff900000.vop to group 1


This patch adds the error message and timeout to avoid infinite loop if
it fails to get the ack.

Signed-off-by: Caesar Wang 
Signed-off-by: Heiko Stuebner

soc: rockchip: power-domain: Don't (incorrectly) set rk3399 up/down counts

2016-10-16T00:42:29+00:00

On rk3288 it was important that powerdown and powerup counts for the
CPU/GPU in the kernel because:
* The power on default was crazy long.
* We couldn't rely on the firmware to set this up because really this
  wasn't the firmware's job--the kernel was the only one that really
  cared about bringing up / down CPUs and the GPU and doing suspend /
  resume (which involves bringing up / down CPUs).

On newer ARM systems (like rk3399) ARM Trusted Firmware is in charge of
bringing up and down the CPUs and it really should be in charge of
setting all these counts right.  After all ATF is in charge of suspend /
resume and CPU up / down.  Let's get out of the way and let ATF do its
job.

A few other motivations for doing this:
* Depending on another configuration (PMU_24M_EN_CFG) these counts can
  be either in 24M or 32k cycles.  Thus, though ATF isn't really so
  involved in bringing up the GPU, ATF should probably manage the counts
  for everything so it can also manage the 24M / 32k choice.
* It turns out that (right now) 24M mode is broken on rk3399 and not
  being used.  That means that the count the kernel was programming
  in (24) was not 1 us (which it seems was intended) but was actually
  .75 ms
* On rk3399 there are actually 2 separate registers for setting CPU
  up/down time plus 1 register for GPU up/down time.  The curent kernel
  code actually was putting the register for the "little" cores in the
  "CPU" slot and the register for the "big" cores in the "GPU" slot.  It
  was never initting the GPU counts.

Note: this change assumes that ATF will actually set these values at
boot, as I'm proposing in .

Signed-off-by: Douglas Anderson 
[ATF change has landed]
Signed-off-by: Heiko Stuebner

soc: rockchip: support active_wakeup for rockchip power-domains

2016-08-18T22:37:20+00:00

Register gpd_dev_ops.active_wakeup function to support keep power
during suspend state. And add flag to each power domain to
decide whether keep power during suspend or not.

Signed-off-by: Elaine Zhang 
Signed-off-by: Heiko Stuebner

soc: rockchip: power-domain: support qos save and restore

2016-04-21T21:02:16+00:00

support qos save and restore when power domain on/off.

Signed-off-by: Elaine Zhang 
Signed-off-by: Heiko Stuebner

soc: rockchip: power-domain: check the existing of regmap

2016-04-12T01:28:08+00:00

Check return value of syscon_node_to_regmap for
rockchip_pm_domain_probe. If err value is returned, probe
procedure should abort.

Signed-off-by: Shawn Lin 
Signed-off-by: Heiko Stuebner

soc: rockchip: power-domain: Modify power domain driver for rk3399

2016-03-28T11:16:45+00:00

This driver is modified to support RK3399 SoC.

Signed-off-by: Elaine Zhang 
[small indentation fixups]
Signed-off-by: Heiko Stuebner

soc: rockchip: power-domain: add support for sub-power domains

2016-03-28T10:57:45+00:00

This patch adds support for making one power domain a sub-domain of
other domain. This is useful for modeling power dependences,
which needs to have more than one power domain enabled to be operational.

Signed-off-by: Elaine Zhang 
[restructured error handling in subdomain-addition]
Signed-off-by: Heiko Stuebner

soc: rockchip: power-domain: allow domains only handling idle requests

2016-03-28T10:06:43+00:00

On some Rockchip SoC there exist child-domains only handling their
idle state with the actual power-state handled by a (shared) parent-
domain.

So allow such types of domains. For them, we can determine their
state (on/off) by checking the inverse idle-state instead.

There exist one special case if both idle as well power handling
were set as not present, but as the domain-data is defined in the
code itself, we can expect the reasonable developer to define them
in a correct way, without adding more checks.

Signed-off-by: Elaine Zhang 
Signed-off-by: Heiko Stuebner