linux-stable.git/drivers/power/reset, branch v4.12.2

power: reset: Add a driver for the Gemini poweroff

2017-04-13T23:41:33+00:00

The Gemini (SL3516) SoC has a special power controller block
that only deal with shutting down the system.

If you do not register a driver and activate the block, the
power button on the systems utilizing this SoC will do an
uncontrolled power cut, which is why it is important to have
a special poweroff driver.

The most basic functionality is to just shut down the system
by writing a special bit in the control register after the
system has reached pm_poweroff.

It also handles the poweroff from a button or other sources:

When the poweroff button is pressed, or a signal is sent to
poweroff from an infrared remote control, or when the RTC
fires a special alarm (!) the system emits an interrupt.
At this point, Linux must acknowledge the interrupt and
proceed to do an orderly shutdown of the system.

After adding this driver, pressing the poweroff button gives
this dmesg:

root@gemini:/
root@gemini:/ gemini-poweroff 4b000000.power-controller:
poweroff button pressed

calling shutdown scripts..
setting /dev/rtc0 from system time
unmounting file systems...
umount: tmpfs busy - remounted read-only
umount: can't unmount /: Invalid argument
The system is going down NOW!
Sent SIGTERM to all processes
Sent SIGKILL to all processes
Requesting system poweroff
uhci_hcd 0000:00:09.1: HCRESET not completed yet!
uhci_hcd 0000:00:09.0: HCRESET not completed yet!
reboot: Power down
gemini-poweroff 4b000000.power-controller: Gemini power off

Cc: Janos Laube 
Cc: Paulius Zaleckas 
Cc: Hans Ulli Kroll 
Cc: Florian Fainelli 
Cc: linux-pm@vger.kernel.org
Cc: Sebastian Reichel 
Signed-off-by: Linus Walleij 
Signed-off-by: Sebastian Reichel

power: reset: syscon-poweroff: add a mask property

2017-04-13T23:41:33+00:00

Make the syscon-poweroff driver accept value and mask instead of
just value.

Prior to this patch, the property name for the value was 'mask'. If
only the mask property is defined on a node, maintain compatibility
by using it as the value.

Signed-off-by: Guy Shapiro 
Acked-by: Rob Herring 
Signed-off-by: Sebastian Reichel

power: reset: at91-reset: remove leftover platform_device_id

2017-01-18T16:05:46+00:00

commit eacd8d09db7f ("power/reset: at91-reset: remove useless
at91_reset_platform_probe()") removed non DT probe support but forgot to
remove the now useless id_table. Do that now.

Signed-off-by: Alexandre Belloni 
Signed-off-by: Sebastian Reichel

power: reset: at91-reset: add samx7 support

2017-01-18T16:05:38+00:00

Add samx7 support. It is lacking a few bits and needs a new reset function.

Signed-off-by: Szemző András 
Signed-off-by: Alexandre Belloni 
Signed-off-by: Sebastian Reichel

power: reset: at91-poweroff: timely shutdown LPDDR memories

2017-01-16T22:21:33+00:00

LPDDR memories can only handle up to 400 uncontrolled power off. Ensure the
proper power off sequence is used before shutting down the platform.

Cc:  # 4.4+
Signed-off-by: Alexandre Belloni 
Signed-off-by: Sebastian Reichel

ktime: Cleanup ktime_set() usage

2016-12-25T16:21:22+00:00

ktime_set(S,N) was required for the timespec storage type and is still
useful for situations where a Seconds and Nanoseconds part of a time value
needs to be converted. For anything where the Seconds argument is 0, this
is pointless and can be replaced with a simple assignment.

Signed-off-by: Thomas Gleixner 
Cc: Peter Zijlstra

power: reset: zx-reboot: Fix module autoload

2016-10-19T03:16:09+00:00

If the driver is built as a module, autoload won't work because the module
alias information is not filled. So user-space can't match the registered
device with the corresponding module.

Export the module alias information using the MODULE_DEVICE_TABLE() macro.

Before this patch:

$ modinfo drivers/power/reset/zx-reboot.ko | grep alias
$

After this patch:

$ modinfo drivers/power/reset/zx-reboot.ko | grep alias
alias:          of:N*T*Czte,sysctrlC*
alias:          of:N*T*Czte,sysctrl

Signed-off-by: Javier Martinez Canillas 
Signed-off-by: Sebastian Reichel

power: reset: syscon-reboot-mode: Fix module autoload

2016-10-19T03:16:09+00:00

If the driver is built as a module, autoload won't work because the module
alias information is not filled. So user-space can't match the registered
device with the corresponding module.

Export the module alias information using the MODULE_DEVICE_TABLE() macro.

Before this patch:

$ modinfo drivers/power/reset/syscon-reboot-mode.ko | grep alias
$

After this patch:

$ modinfo drivers/power/reset/syscon-reboot-mode.ko | grep alias
alias:          of:N*T*Csyscon-reboot-modeC*
alias:          of:N*T*Csyscon-reboot-mode

Signed-off-by: Javier Martinez Canillas 
Signed-off-by: Sebastian Reichel

power: reset: at91-poweroff: Fix module autoload

2016-10-19T03:16:09+00:00

If the driver is built as a module, autoload won't work because the module
alias information is not filled. So user-space can't match the registered
device with the corresponding module.

Export the module alias information using the MODULE_DEVICE_TABLE() macro.

Before this patch:

$ modinfo drivers/power/reset/at91-poweroff.ko | grep alias
$

After this patch:

$ modinfo drivers/power/reset/at91-poweroff.ko | grep alias
alias:          of:N*T*Catmel,at91sam9x5-shdwcC*
alias:          of:N*T*Catmel,at91sam9x5-shdwc
alias:          of:N*T*Catmel,at91sam9rl-shdwcC*
alias:          of:N*T*Catmel,at91sam9rl-shdwc
alias:          of:N*T*Catmel,at91sam9260-shdwcC*
alias:          of:N*T*Catmel,at91sam9260-shdwc

Signed-off-by: Javier Martinez Canillas 
Signed-off-by: Sebastian Reichel

power: reset: at91-reset: Fix module autoload

2016-10-19T03:16:09+00:00

If the driver is built as a module, autoload won't work because the module
alias information is not filled. So user-space can't match the registered
device with the corresponding module.

Export the module alias information using the MODULE_DEVICE_TABLE() macro.

Before this patch:

$ modinfo drivers/power/reset/at91-reset.ko | grep alias
$

After this patch:

$ modinfo drivers/power/reset/at91-reset.ko | grep alias
alias:          of:N*T*Catmel,sama5d3-rstcC*
alias:          of:N*T*Catmel,sama5d3-rstc
alias:          of:N*T*Catmel,at91sam9g45-rstcC*
alias:          of:N*T*Catmel,at91sam9g45-rstc
alias:          of:N*T*Catmel,at91sam9260-rstcC*
alias:          of:N*T*Catmel,at91sam9260-rstc
alias:          platform:at91-sam9g45-reset
alias:          platform:at91-sam9260-reset

Signed-off-by: Javier Martinez Canillas 
Signed-off-by: Sebastian Reichel