mmc: dt: pwrseq-simple: Invent power-off-delay-us
authorUlf Hansson <ulf.hansson@linaro.org>
Sat, 6 May 2017 09:41:30 +0000 (11:41 +0200)
committerUlf Hansson <ulf.hansson@linaro.org>
Tue, 23 May 2017 12:17:10 +0000 (14:17 +0200)
commitc477ebe21fabe0010a2ed324ce3a1762c757d867
tree24432b73b10451cab7d7e8569913ab99e6909763
parent08332893e37af6ae779367e78e444f8f9571511d
mmc: dt: pwrseq-simple: Invent power-off-delay-us

During power off, after the GPIO pin has been asserted, some devices like
the Wifi chip from TI, Wl18xx, needs a delay before the host continues with
clock gating and turning off regulators as to follow a graceful shutdown
sequence.

Therefore invent an optional power-off-delay-us DT binding for
mmc-pwrseq-simple, to allow us to support this constraint.

Cc: devicetree@vger.kernel.org
Cc: Rob Herring <robh+dt@kernel.org>
Cc: linux-mmc@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Documentation/devicetree/bindings/mmc/mmc-pwrseq-simple.txt