Add the function shmobile_platform_kill_cpu() to allow
SoC specific code to tie in their CPU shutdown code.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Convert the low level SMP assembly code for SH-Mobile ARM
from using the INIT to the CPUINIT section. This unbreaks
onlining of CPUs using the CPU hotplug interface:

echo 1 > /sys/devices/system/cpu/cpu1/online

Without this fix the reset vector code used by CPU hotplug
will be freed as init section data and CPU cores cannot
be brought online.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

The 158MiB memory area was used to support HD
resolution multimedia workloads using the same
legacy memory allocating solution as on SH.

There are no in-tree kernel dependencies on the
158MiB setting, and future development should
reserve and allocate memory using some other
method like for instance CMA.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NNicolas Pitre <nico@linaro.org>

After adding PM QoS constraints for the I2C controller in the A4R
domain, that domain can be allowed to be turned off and on by runtime
PM, so remove the "always on" governor from it.

However, the A4R domain has to be "on" when suspend_device_irqs() and
resume_device_irqs() are executed during system suspend and resume,
respectively, so that those functions don't crash while accessing the
INTCS.  For this reason, add a PM notifier to the SH7372 PM code and
make it restore power to A4R before system suspend and remove power
from all unused PM domains after system resume.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Acked-by: NMagnus Damm <damm@opensource.se>

SH7372 uses two independent mechanisms for ensuring that power
domains will never be turned off: the stay_on flag and the "always
on" domain governor.  Moreover, the "always on" governor is only taken
into accout by runtime PM code paths, while the stay_on flag affects
all attempts to turn the given domain off.  Thus setting the stay_on
flag causes the "always on" governor to be unnecessary, which is
quite confusing.

However, the stay_on flag is currently only set for two domains: A3SP
and A4S.  Moreover, it only is set for the A3SP domain if
console_suspend_enabled is set, so stay_on won't be necessary for
that domain any more if console_suspend_enabled is checked directly
in its .suspend() routine.  [This requires domain .suspend() to
return a result, but that is a minor modification.]  Analogously,
stay_on won't be necessary for the A4S domain if it's .suspend()
routine always returns an error code.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Acked-by: NMagnus Damm <damm@opensource.se>

Since the SH7372's INTCS in included into syscore suspend/resume,
which causes the chip to be accessed when PM domains have been
turned off during system suspend, the A4R domain containing the
INTCS has to stay on during system sleep, which is suboptimal
from the power consumption point of view.

For this reason, add a new INTC flag, skip_syscore_suspend, to mark
the INTCS for intc_suspend() and intc_resume(), so that they don't
touch it.  This allows the A4R domain to be turned off during
system suspend and the INTCS state is resrored during system
resume by the A4R's "power on" code.
Suggested-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Acked-by: NMagnus Damm <damm@opensource.se>

The sh7372 contains a power domain named A4S which in turn
contains power domains for both I/O Devices and CPU cores.

At this point only System wide Suspend-to-RAM is supported,
but the the hardware can also support CPUIdle. With more
efforts in the future CPUIdle can work with bot A4S and A3SM.

Tested on the sh7372 Mackerel board.

[rjw: Rebased on top of the current linux-pm tree.]
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

Add default value for CONFIG_ARCH_NR_GPIO to Kconfig and remove the
definition in gpio.h.
Signed-off-by: NPeter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Saves a tiny amount of code.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

Add a name member pointer to struct generic_pm_domain and use it in
diagnostic messages regarding the domain power-off and power-on
latencies.  Update the ARM shmobile SH7372 code to assign names to
the PM domains used by it.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Acked-by: NMagnus Damm <damm@opensource.se>

Add a function deciding whether or not devices should be stopped in
pm_genpd_runtime_suspend() depending on their PM QoS constraints
and stop/start timing values.  Make it possible to add information
used by this function to device objects.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Acked-by: NMagnus Damm <damm@opensource.se>

The current generic PM domains code requires that the same .stop(),
.start() and .active_wakeup() device callback routines be used for
all devices in the given domain, which is inflexible and may not
cover some specific use cases.  For this reason, make it possible to
use device specific .start()/.stop() and .active_wakeup() callback
routines by adding corresponding callback pointers to struct
generic_pm_domain_data.  Add a new helper routine,
pm_genpd_register_callbacks(), that can be used to populate
the new per-device callback pointers.

Modify the shmobile's power domains code to allow drivers to add
their own code to be run during the device stop and start operations
with the help of the new callback pointers.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Acked-by: NMagnus Damm <damm@opensource.se>

Signed-off-by: NNicolas Pitre <nicolas.pitre@linaro.org>

Keep the ZB clock enabled on sh73a0 to allow the BSC
to access external peripherals hooked up to CS signals.

This is needed to unbreak Ethernet support on sh73a0 boards
such as AG5EVM and Kota2 together with the following patch:

 794d78fe drivers: sh: late disabling of clocks V2
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Fix IRQ support on the AG5EVM board. The sh73a0 and the AG5EVM
board make use of the ARM GIC hardware block as main interrupt
controller. The following commit changed the default behaviour
for non-device tree platforms and broke AG5EVM irq support:

f37a53cc ARM: gic: fix irq_alloc_descs handling for sparse irq

Without this fix the following warning triggers at boot:

NR_IRQS:1024 nr_irqs:1024 1024
------------[ cut here ]------------
WARNING: at arch/arm/common/gic.c:607 gic_init+0x90/0x2e4()
Cannot allocate irq_descs @ IRQ16, assuming pre-allocated
[<c000c868>] (unwind_backtrace+0x0/0xe0) from [<c001857c>] (warn_slowpath_commo)
[<c001857c>] (warn_slowpath_common+0x48/0x60) from [<c00185d8>] (warn_slowpath_)
[<c00185d8>] (warn_slowpath_fmt+0x2c/0x3c) from [<c029ee08>] (gic_init+0x90/0x2)
[<c029ee08>] (gic_init+0x90/0x2e4) from [<c029f278>] (sh73a0_init_irq+0x30/0x18)
[<c029f278>] (sh73a0_init_irq+0x30/0x184) from [<c029c0b4>] (init_IRQ+0x14/0x1c)
[<c029c0b4>] (init_IRQ+0x14/0x1c) from [<c029a5cc>] (start_kernel+0x15c/0x2b8)
[<c029a5cc>] (start_kernel+0x15c/0x2b8) from [<4000803c>] (0x4000803c)
---[ end trace 1b75b31a2719ed1c ]---

With this fix applied interrupts work as expected.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Acked-by: NRob Herring <rob.herring@calxeda.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This patch updates the Kota2 board support code to
use the recently merged TPU LED driver whenever
possible.

The sh73a0 SoC has 5 TPU hardware blocks each with
4 timer channels which in theory allows a total of
20 LEDs to be controlled by "leds-renesas-tpu"
driver instances. The Kota2 board has 4 LEDs connected
to GPIO pins that also come with TPU pin functions, so
this patch ties up these 4 LEDS and leaves the remaining
3 LEDS for the GPIO based LED driver.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Fix IRQ support on the Kota2 board. The sh73a0 and the Kota2
board make use of the ARM GIC hardware block as main interrupt
controller. The following commit changed the default behaviour
for non-device tree platforms and broke Kota2 irq support:

f37a53cc ARM: gic: fix irq_alloc_descs handling for sparse irq

Without this fix the following warning triggers at boot:

NR_IRQS:1024 nr_irqs:1024 1024
------------[ cut here ]------------
WARNING: at arch/arm/common/gic.c:607 gic_init+0x90/0x2e4()
Cannot allocate irq_descs @ IRQ16, assuming pre-allocated
[<c000c868>] (unwind_backtrace+0x0/0xe0) from [<c001857c>] (warn_slowpath_commo)
[<c001857c>] (warn_slowpath_common+0x48/0x60) from [<c00185d8>] (warn_slowpath_)
[<c00185d8>] (warn_slowpath_fmt+0x2c/0x3c) from [<c029ee08>] (gic_init+0x90/0x2)
[<c029ee08>] (gic_init+0x90/0x2e4) from [<c029f278>] (sh73a0_init_irq+0x30/0x18)
[<c029f278>] (sh73a0_init_irq+0x30/0x184) from [<c029c0b4>] (init_IRQ+0x14/0x1c)
[<c029c0b4>] (init_IRQ+0x14/0x1c) from [<c029a5cc>] (start_kernel+0x15c/0x2b8)
[<c029a5cc>] (start_kernel+0x15c/0x2b8) from [<4000803c>] (0x4000803c)
---[ end trace 1b75b31a2719ed1c ]---

With this fix applied interrupts work as expected.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Acked-by: NRob Herring <rob.herring@calxeda.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Support PINT on sh73a0 and Kota2 using INTC PINT macros.

With this patch applied the Kota2 ethernet is handled
through one of the chained sh73a0 PINT interrupt controllers.

sh73a0 PINT support is included in 3.2-rc but the Kota2 board
code does not make use of this shared code base without this
patch. Without this patch kota2 on-board ethernet is broken.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

We only need to set the system up for a soft-restart if we're going to
be doing a soft-restart.  Provide a new function (soft_restart()) which
does the setup and final call for this, and make platforms use it.
Eliminate the call to setup_restart() from the default handler.

This means that platforms arch_reset() function is no longer called with
the page tables prepared for a soft-restart, and caches will still be
enabled.
Acked-by: NNicolas Pitre <nico@linaro.org>
Acked-by: NWill Deacon <will.deacon@arm.com>
Acked-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NSascha Hauer <s.hauer@pengutronix.de>
Acked-by: NViresh Kumar <viresh.kumar@st.com>
Acked-by: NKrzysztof Ha■asa <khc@pm.waw.pl>
Acked-by: NPaul Mundt <lethal@linux-sh.org>
Acked-by: NRichard Purdie <richard.purdie@linuxfoundation.org>
Acked-by: NWan ZongShun <mcuos.com@gmail.com>
Acked-by: NEric Miao <eric.y.miao@gmail.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Fix build regression introduced by commit 056879d2
(ARM: mach-shmobile: sh7372 A3SP no_suspend_console fix) by moving
the intialization of the A3SP domain to a separate function and
providing an empty definition of it for CONFIG_PM unset.
Reported-and-tested-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

Convert the SMP shmobile platforms to use gic_handle_irq() instead
of the assembly macro.

Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>

Even when CONFIG_MULTI_IRQ_HANDLER is selected, the core code
requires the arch_irq_handler_default macro to be defined as
a fallback.

It turns out nobody is using that particular feature as both PXA
and shmobile have all their machine descriptors populated with
the interrupt handler, leaving unused code (or empty macros) in
their entry-macro.S file just to be able to compile entry-armv.S.

Make CONFIG_MULTI_IRQ_HANDLER exclusive wrt arch_irq_handler_default,
which allows to remove one test from the hot path. Also cleanup both
PXA and shmobile entry-macro.S.

Cc: Paul Mundt <lethal@linux-sh.org>
Acked-by: NNicolas Pitre <nico@linaro.org>
Acked-by: NEric Miao <eric.y.miao@gmail.com>
Tested-by: NJamie Iles <jamie@jamieiles.com>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>

The SH7372 PM domain initialization routine calls pd_power_up()
that executes the domain's .resume() callback, if present, and for
the A4R domain this callback attepmts to restore the INTCS state from
uninitialized data.  To avoid that, introduce __pd_power_up() that
will only execute the domain's .resume() callback if its second
argument is 'true' and make the SH7372 PM domain initialization
use it with 'false' as its second argument.  Redefine pd_power_up()
as a wrapper around __pd_power_up().
Reported-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Tracked-down-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Acked-by: NMagnus Damm <damm@opensource.se>

The following commits break cpuidle on SH-Mobile ARM:

46bcfad7 cpuidle: Single/Global registration of idle states
e978aa7d cpuidle: Move dev->last_residency update to driver enter routine; remove dev->last_state

This patch remedies these issues by up-porting the SH-Mobile
code to fit with the above introduced framework changes.

It is worth noting that the new code becomes significantly cleaner,
so these framework changes are very welcome. At the same time this
breakage could probably have been avoided by grepping for "last_state"
and "cpuidle_register_driver".
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This patch moves PORT_xx helper macro to sh_pfc.h,
and it expects CPU_ALL_PORT() macro for each CPU
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This patch move PORT_DATA_xx helper macro to sh_pfc.h.
and pfc-sh7372.c used it
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

it is not necessary to have sh7372_xxxx index on static variable
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This patch adds MMC data pin pull-up option for pfc-sh73a0.c,
and select it on ag5evm board.
The MMC read/write will be error without this patch.

Cc: Takashi YOSHII <takashi.yoshii.zj@renesas.com>
Tested-by: NSimon Horman <horms@verge.net.au>
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

The runtime PM platform support stub in use by ARM-based SH/R-Mobile
platforms contains nothing that's specifically ARM-related and instead of
wholly generic to anything using the clock framework.

The recent runtime PM changes interact rather badly with the lazy
disabling of clocks late in the boot process through the clock framework,
leading to situations where the runtime suspend/resume paths are entered
without a clock being actively driven due to having been lazily gated
off.

In order to correct this we can trivially tie in the aforementioned stub
as a general fallback for all SH platforms that don't presently have
their own runtime PM implementations (the corner case being SH-based
SH-Mobile platforms, which have their own stub through the hwblk API --
which in turn has bitrotted and will be subsequently adapted to use the
same stub as everyone else), regardless of whether the platforms choose
to define power domains of their own or not.

This fixes up regressions for clock framework users who also build in
runtime PM support without any specific power domains of their own, which
was previously causing the serial console to be lost when warring with
lazy clock disabling.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

If "no_suspend_irq" is used on the sh7372 Mackerel board
with v3.2-rc1 then Suspend-to-RAM fails because the serial
console tries to write to the SCIF driver even though the
power domain is turned off.

This patch checks the state of "console_suspend_enabled"
to see if A3SP should be forced enabled.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

Don't skip debugging output upon earlier loop termination in pd_power_up().
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

ag5evm implements a backlight control, using an I2C controller, therefore
it needs CONFIG_I2C to fix this make failure

arch/arm/mach-shmobile/built-in.o: In function `lcd_on':
pfc-sh73a0.c:(.text+0x2334): undefined reference to `i2c_get_adapter'
pfc-sh73a0.c:(.text+0x2370): undefined reference to `i2c_transfer'

(ignore pfc-sh73a0.c) and to build successfully.
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Support PINT on sh73a0 and AG5EVM using INTC PINT macros.

With this patch applied the AG5EVM ethernet is handled
through one of the chained sh73a0 PINT interrupt controllers.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Add a INTC_PINT() macro with various helper bits to allow SoCs
like sh73a0 to suppor the PINT hardware using regular INTC tables.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Implement GPIO hotplugging via TMIO_MMC_HAS_COLD_CD for
AG5EVM SDHI0. This is possible now when INTCA is used for
IRQ triggering on sh73a0. Without INTCA IRQ support we are
left with the GIC hardware block that does not support
dealing with active low interrupt sources.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Improve IRQ triggering support by making use of the macro
INTC_IRQ_PINS_32() for INTCA on sh73a0. Unfortunately it
is not as easy as just using the macro as-is, we need to
do mask and unmaks in the GIC but configure other bits
and ack in INTCA. Update GPIO IRQ mappings while at it.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Make use of INTC_IRQ_PINS_32() for INTCA on sh7372.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>