Hi Rafael, 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)).
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.
This means that functionality-wise, the DT version is now on par with the
legacy version ("[PATCH v2 00/11] ARM: shmobile: r8a7740/armadillo800eva legacy
PM domain support").
Dependencies:
- Simon Horman's renesas-devel-20140924-v3.17-rc6,
- Rafael J. Wysocki's linux-pm.git#linux-next,
- Jason Cooper's linux.git#irqchip/for-next.
- "ARM: shmobile: R-Mobile: Store SYSC base address in rmobile_pm_domain"
depends on the legacy version of this series, but if the legacy version
will never be accepted, the conflicts are trivial to resolve (drop changes
to non-existing PM domains),
- Working resume from s2ram depends on:
- "[PATCH/RFC] fbdev: sh_mobile_hdmi: Re-init regs before irq re-enable
on resume",
- "[PATCH] ARM: hw_breakpoint: Trap undef instruction exceptions on
wake-up", or an alternative solution.
- Working "no_console_suspend" handling depends on "[PATCH 06/13] ARM:
shmobile: armadillo800eva dts: Add chosen/stdout-path".
For your convenience, I've also pushed this (incl. its dependencies) to
git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git#rmobile-genpd
Rafael: If you accept "PM / Domains: Add genpd attach/detach callbacks", it
would be good to get this patch in v3.18-rc1, as it's the only hard dependency
on linux-pm.git for the rest of this series. The other parts have relaxed
ordering constraints due to the separation of code and DTS.
Question: Can we use the preliminary PM domain power-on/off and QoS device
latencie patches (the last 2) as-is, or should we refine them first?
Thanks!
Geert Uytterhoeven (13):
PM / Domains: Add genpd attach/detach callbacks
PM / Domains: Add DT bindings for power-on/off latencies
PM / Domains: Add DT bindings for PM QoS device latencies
PM / Domains: Add DT bindings for the R-Mobile System Controller
PM / Domains: Add helper variable np = dev->of_node
PM / Domains: Retrieve PM QoS device latencies from DT
ARM: shmobile: R-Mobile: Use generic_pm_domain.attach_dev() for pm_clk
setup
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
ARM: shmobile: r8a7740 dtsi: Add preliminary PM domain latencies
ARM: shmobile: r8a7740 dtsi: Add preliminary PM QoS device latencies
.../devicetree/bindings/power/power_domain.txt | 16 ++
.../bindings/power/renesas,sysc-rmobile.txt | 111 +++++++++
arch/arm/boot/dts/r8a7740.dtsi | 257 +++++++++++++++++++++
arch/arm/mach-shmobile/Kconfig | 3 +-
arch/arm/mach-shmobile/pm-r8a7740.c | 14 ++
arch/arm/mach-shmobile/pm-rmobile.c | 236 +++++++++++++++++--
arch/arm/mach-shmobile/pm-rmobile.h | 3 +-
arch/arm/mach-shmobile/pm-sh7372.c | 11 +
drivers/base/power/domain.c | 32 ++-
drivers/sh/pm_runtime.c | 2 +
include/linux/pm_domain.h | 2 +
11 files changed, 663 insertions(+), 24 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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