[PATCH v2 0/4] ARM: at91: pm: add ULP1 mode support

Wenyou Yang
2016-02-04T07:37:47Z

The ULP1 (Ultra Low-power mode 1) is introduced by SAMA5D2.

In order to achieve the lowest power consumption, in the ULP1 mode,
all the clocks are shut off, inclusive the embedded 12MHz RC oscillator.

The fast startup signal is used as a wake up source for ULP1 mode.
As soon as the wake up event is asserted, the embedded 12MHz RC
oscillator restarts automatically, which fast startup signal
to trigger the PMC to wake up the system from the ULP1 mode can be
configured via DT.

It is based on the following patch set:
http://lists.infradead.org/pipermail/linux-arm-kernel/2015-December/390954.html

Changes in v2:
- fix label pm_exit to ulp_exit.
- shorten the pmc-fast-startup property's name.
- use the value property, instead of bool property for high
or low triggered.
- change the property name and property description.

Wenyou Yang (4):
ARM: at91: pm: create a separate procedure for the ULP0 mode
ARM: at91: pm: add ULP1 mode support
ARM: at91: pm: configure PMC fast startup signals
Documentation: atmel-pmc: add DT bindings for fast startup

.../devicetree/bindings/arm/atmel-pmc.txt | 63 ++++++++
arch/arm/mach-at91/pm.c | 131 +++++++++++++++-
arch/arm/mach-at91/pm.h | 7 +
arch/arm/mach-at91/pm_suspend.S | 158 +++++++++++++++++---
include/linux/clk/at91_pmc.h | 36 +++++
5 files changed, 370 insertions(+), 25 deletions(-)

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