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power: reset: Add Intel PIIX4 poweroff driver

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Add a driver which allows powering off the system via an Intel PIIX4
southbridge, by entering the PIIX4 SOff state. This is useful on the
MIPS Malta development board, where it will power down the FPGA based
board until its ON/NMI button is pressed, or the QEMU implementation of
the MIPS Malta board where it will cause QEMU to exit.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Sebastian Reichel <sre@kernel.org>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: linux-pm@vger.kernel.org
Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
Paul Burton
2016-09-28 16:30:56 +01:00
committed by Sebastian Reichel
parent 1001354ca3
commit 29676833df
3 changed files with 124 additions and 0 deletions
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10
drivers/power/reset/Kconfig
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@@ -104,6 +104,16 @@ config POWER_RESET_MSM
help
Power off and restart support for Qualcomm boards.
config POWER_RESET_PIIX4_POWEROFF
tristate "Intel PIIX4 power-off driver"
depends on PCI
depends on MIPS || COMPILE_TEST
help
This driver supports powering off a system using the Intel PIIX4
southbridge, for example the MIPS Malta development board. The
southbridge SOff state is entered in response to a request to
power off the system.
config POWER_RESET_LTC2952
bool "LTC2952 PowerPath power-off driver"
depends on OF_GPIO