Hi Simon, Magnus,
This patch series enables DT support for PM domains on Renesas R-Mobile SoCs.
Currently it's limited to R-Mobile A1 (r8a7740), but given the similarity of
the SYSC System-Controller on the various SH-Mobile/R-Mobile SoCs, and the
abstraction of PM domains in DT, it should be sufficiently generic to handle
other SoCs in the future (e.g. SH-Mobile AP4 (sh7372), SH-Mobile AG5 (sh73a0),
R-Mobile APE6 (r8a73a4)). In fact preliminary patches for SH-Mobile AG5
(sh73a0) that build on top of this have been posted before.
Functionality-wise, this behaves the same as the legacy (non-DT) version
(modulo missing DT support in some device drivers).
Please apply, thanks!
Dependencies:
- This is based on Simon Horman's renesas-devel-20141202-v3.18-rc7.
Changes compared to v5:
- Drop bindings and code for power-on/off latencies. They can be handled
later. This means the whole series can go through Simon's tree now.
Changes compared to v4:
- Update for {at,de}tach_dev() taking a generic_pm_domain pointer
again,
Changes compared to v3 (more detailed changelogs in the individual patches):
- I dropped the patch to add preliminary PM domain latencies, as I want to do
more measurements for PM domains that are currently never powered off.
Values seem to range between 8.5 and 26 us, depending on the PM domain.
- I dropped all patches related to QoS device latencies, as these need more
discussion,
- The power-{on,off}-latency properties have been changed from a single value
to a list,
- Device save/restore state latencies have been dropped, as they're Linux
driver-specific, and thus don't belong in DT,
- Use proper pm_clk_create()/pm_clk_destroy(), and update for attach_dev()
returning an error code again,
- New patch to enable module clocks if !CONFIG_PM_RUNTIME,
- Always keep D4 powered, until the new Coresight code handles runtime
PM,
- Remove bogus power-domains properties from clock nodes, as these will not
be instantiated as platform devices,
- Add power-domains properties to the recently added TMU nodes,
- Added Acked-by, Reviewed-by.
Changes compared to v2 (more detailed changelogs in the individual patches):
- Minor changes to attach/detach callbacks,
- Really add the A4MP and D4 PM domains, as fixes are available (see
dependencies below),
- Scan DT topology to identify special PM domains (CPUs and console),
- Move PM domain power-on/off latencies to a separate patch.
Changes compared to v1 (more detailed changelogs in the individual patches):
- Several new patches: PM QoS device latencies in DT, attach/detach
callbacks,
- Run-Time management of the module clocks, making the hack in
drivers/sh/pm_runtime.c obsolete for DT platforms using genpd,
- Addition of PM QoS device latencies, specified from DT,
- Addition of build glue, so this builds and runs without additional
changes, incl. s2ram.
Geert Uytterhoeven (7):
PM / Domains: Add DT bindings for the R-Mobile System Controller
ARM: shmobile: R-Mobile: Use generic_pm_domain.attach_dev() for pm_clk
setup
ARM: shmobile: R-Mobile: Enable module clocks if !CONFIG_PM_RUNTIME
ARM: shmobile: R-Mobile: Store SYSC base address in rmobile_pm_domain
ARM: shmobile: R-Mobile: Add DT support for PM domains
ARM: shmobile: r8a7740 dtsi: Add PM domain support
drivers: sh: Disable PM runtime for multi-platform r8a7740 with genpd
.../bindings/power/renesas,sysc-rmobile.txt | 98 +++++++
arch/arm/boot/dts/r8a7740.dtsi | 99 ++++++++
arch/arm/mach-shmobile/Kconfig | 3 +-
arch/arm/mach-shmobile/pm-r8a7740.c | 14 +
arch/arm/mach-shmobile/pm-rmobile.c | 281 +++++++++++++++++++--
arch/arm/mach-shmobile/pm-rmobile.h | 3 +-
arch/arm/mach-shmobile/pm-sh7372.c | 11 +
drivers/sh/pm_runtime.c | 2 +
8 files changed, 494 insertions(+), 17 deletions(-)
create mode 100644 Documentation/devicetree/bindings/power/renesas,sysc-rmobile.txt
--
1.9.1
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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