[PATCH v6 0/4] clk: Provide support for always-on clocks

From: Lee Jones
Date: Tue Apr 07 2015 - 14:46:03 EST

Lots of platforms contain clocks which if turned off would prove fatal.
The only way to recover from these catastrophic failures is to restart
the board(s). Now, when a clock provider is registered with the
framework it is possible for a list of always-on clocks to be supplied
which must be kept ungated. Each clock mentioned in the newly
introduced 'clock-always-on' will be clk_prepare_enable()d where the
normal references will be taken. This will prevent the common clk
framework from attempting to gate them during the clk_disable_unused()
and disable_clock() procedures.

v5 => v6:
- Use of_clk_get_from_provider() instead of of_clk_get_by_clkspec()
- Explicitly describe expected DT values
- Be pedantic with regards to printk() format specifiers

vX => v5:
Implementations have changed drastically between versions, thus I
would like for this set to be thought of independently from its
predecessors. The only reason for identifying as 'v5' is ease of
differentiation on the list, which stems from the confusion caused
by submitting 'v4' as a separate entity.

Lee Jones (4):
ARM: sti: stih407-family: Supply defines for CLOCKGEN A0
ARM: sti: stih410-clocks: Identify critical clocks as always-on
clk: Provide always-on clock support
clk: dt: Introduce binding for always-on clock support

.../devicetree/bindings/clock/clock-bindings.txt | 38 +++++++++++++++++++
arch/arm/boot/dts/stih410-clock.dtsi | 10 +++++
drivers/clk/clk-conf.c | 43 +++++++++++++++++++++-
include/dt-bindings/clock/stih407-clks.h | 4 ++
4 files changed, 94 insertions(+), 1 deletion(-)


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