This patch introduces a routine to check if there are some
irqs pending on the gic. Usually this check is not relevant because
it appears racy (an irq can arrive right after this check), but in
the ux500 it makes sense because the prcmu decouples the gic from
the A9 cores.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

I missed in my previous patch the A9_MASK_REQ[_MASK] were
already defined. Let's remove the duplicate definitions.

The PRCMU_GIC_DELAY macro could be removed as it is not
really useful here.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This patch allows to decouple and recouple the gic from the PRCMU.
This is needed to put the A9 core in retention mode with the cpuidle
driver.

It is based on top of the "DB8500 PRCMU update" patchset.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: NRickard Andersson <rickard.andersson@stericsson.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This patch adds an initial PRCMU register access API, which
for now should only be used for a very limited set of registers.

The idea about this API is that we split the PRCMU driver in
one part that deals with interaction with the PRCMU firmware
and one part that simply provide write accessors in the PRCMU
register range. The latter are just a collection of registers
exposed in the PRCMU register range for various purposes and
not related to the PRCMU firmware.

Currently we support some limited GPIO, SPI and UART settings
through this API.
Signed-off-by: NMattias Nilsson <mattias.i.nilsson@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

In prcmu firmware version 3.4.4 the issue with longer
intervalls than 131 s was fixed, we don't expect the
issue to creep back up.
Signed-off-by: NJonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This updates the operating point handling code by:

- Supporting the DDR OPP retention state.
- Supporting another low operating point named
  APE_50_PARTLY_25_OPP
- Adding an interface to figure out if the sleep state change
  was properly achieved.
Signed-off-by: NShreshtha Kumar Sahu <shreshthakumar.sahu@stericsson.com>
Signed-off-by: NRabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: NMattias Nilsson <mattias.i.nilsson@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

As drivers have progressed and got some more review we have
consequently moved things around:

- Some device drivers have changed name and some were wrong
  from the beginning.
- We removed the dependency from some domains to the VAPE
  domain -  SIA MMDSP, SIA PIPE, SVA MMDSP and SVA PIPE power
  domains are handled outside the framework while ESRAM12
  and ESRAM34 are actually handled inside the PRCMU.
Reviewed-by: NRickard Andersson <rickard.andersson@stericsson.com>
Reviewed-by: NJonas Aberg <jonas.aberg@stericsson.com>
Signed-off-by: NBengt Jonsson <bengt.g.jonsson@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This updates the clock handling in the DB8500 PRCMU driver with
the latest findings and API changes related to changes in the
backing firmware in the PRCMU.

- Add the necessary interfaces to get the frequencies of the
  clocks and set the rate of some of the clocks.
- Add support for controlling the clocks PLLSOC0, PLLDSI,
  DSI0, DSI1 and DSI escape clocks (DSInESCCLK).
- Correct the PLLSDI enable/disable sequence by using the
  DSIPLL_CLAMPI bit.

After this we will have the interfaces and code to implement the
U8500 clock framework properly.
Reviewed-by: NJonas Aberg <jonas.aberg@stericsson.com>
Signed-off-by: NMattias Nilsson <mattias.i.nilsson@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This prefixes a number of accessor functions with db8500_* since
they are DB8500-specific and we need to move to this naming
scheme.

We also replace numerous instances of machine_is() with cpu_is()
which covers the right type of ASICs rather than entire machines
i.e. boards.
Signed-off-by: NMattias Nilsson <mattias.i.nilsson@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This patch exports a function that can be used to tell which
version of the DB8500 PRCMU firmware is available, and revamps the
firmware detection code a bit.
Reviewed-by: NBengt Jonsson <bengt.g.jonsson@stericsson.com>
Reviewed-by: NJonas Aberg <jonas.aberg@stericsson.com>
Signed-off-by: NMattias Nilsson <mattias.i.nilsson@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This removes the U8400 legacy from PRCMU and cpufreq drivers.
This platform has no current in-kernel users.
Signed-off-by: NDaniel Willerud <daniel.willerud@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The DB8500 ED (Early Drop) and V1 are only available inside of
ST-Ericsson or partners, we have actively replaced and scrapped
these prototypes. All Nova products on the open market (such as
the Snowball board) are based on V2 and later ASIC variants.
So let us focus on supporting the silicon that will be used and
delete this to get a clear overview.

Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: NSamuel Ortiz <samuel.ortiz@intel.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

panic() is too heavy for this, indeed the PRCMU is critical for
the system but not to the point that we should stop everything,
if we can still get a prompt or so.
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This refactors the mfd/dbx500-prcmu drivers to use a switch()
statement rather than nested if/else-construction.
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This renames the PRCMU clock force initialization function
to have a less generic name.
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This rectifies the device name of the MCDE voltage domain
regulator consumer and adds a number of other consumers to
the voltage domains.

Cc: Liam Girdwood <lrg@ti.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NBengt Jonsson <bengt.g.jonsson@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This implements the reset code retrieval function so we can
ipso facto get to know how the system was reset.
Signed-off-by: NSebastian Rasmussen <sebastian.rasmussen@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This is a tweak for the case where the modem goes to sleep while
emitting the AC_WAKE_ACK anyway. Also print the modem errors as
critical, since they jeopardize the entire platform when they
occur.
Signed-off-by: NMattias Nilsson <mattias.i.nilsson@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This implements the watchdog accessor functions for the DB8500
PRCMU, making it possible to implement the watchdog driver.
Signed-off-by: NJonas Aberg <jonas.aberg@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This implements the accessor function for hardware accelerator
power state settings.
Signed-off-by: NBengt Jonsson <bengt.g.jonsson@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This extends the DB8500 PRCMU driver with accessor calls for the
PRCMU PLL and SGA clocks.
Signed-off-by: NMattias Nilsson <mattias.i.nilsson@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Now that we have a shared API between the DB8500 and DB5500
PRCMU's, switch to using this neutral API instead. We delete the
parts of db8500-prcmu.h that is now PRCMU-neutral, and calls will
be diverted to respective driver. Common registers are in
dbx500-prcmu-regs.h and common accessors and defines in
<linux/mfd/dbx500-prcmu.h> This way we get a a lot more
abstraction and code reuse.
Signed-off-by: NMattias Nilsson <mattias.i.nilsson@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Some clocks may be force enabled when we probe the
driver, but they need to be turned off by default so
we have a known state. We call this the register
initialization function if we need more stuff in
there in the future.
Signed-off-by: NMattias Nilsson <mattias.i.nilsson@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

We have a few more mailboxes and fixed messages in the
DB8500 PRCMU, update to match the latest specification.
Signed-off-by: NMattias Nilsson <mattias.i.nilsson@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Instead of carrying around the __PRCMU_BASE in every read or
write to the PRCMU registers, move it out to the register
definition file and define registers along with their base
offset so that the code gets easier to read.
Signed-off-by: NMattias Nilsson <mattias.i.nilsson@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

With the addition of a device platform mfd_cell pointer, MFD drivers
can go back to passing platform data back to their sub drivers.
This allows for an mfd_cell->mfd_data removal and thus keep the
sub drivers MFD agnostic. This is mostly needed for non MFD aware
sub drivers.
Signed-off-by: NMattias Wallin <mattias.wallin@stericsson.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The DB8500 has ePOD:s (electronic power domains) which are possible
to switch on/off to deactivate silicon blocks on the DB8500 SoC
by cutting their power without retention. We model these as simple
regulators with one bit on/off settings.
Acked-by: NLiam Girdwood <lrg@slimlogic.co.uk>
Acked-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NBengt Jonsson <bengt.g.jonsson@stericsson.com>
Signed-off-by: NSundar Iyer <sundar.iyer@stericsson.com>
Signed-off-by: NJonas Aberg <jonas.aberg@stericsson.com>
Signed-off-by: NVirupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>
Signed-off-by: NMartin Persson <martin.persson@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This updates the DB8500 PRCMU driver to the latest version
available internally. Nominally we would update the dependent
CPUfreq driver at the same time but since that is being moved
around in this patch set we postpone that by simply deactivating
it for the time being.

This is a snapshot of the current PRCMU firmware API as it looks
right now. The PRCMU firmware is still subject to change. This
also updates the CPUfreq driver to a newer version that will
utilize the new API.
Acked-by: NSamuel Ortiz <sameo@linux.intel.com>
Signed-off-by: NMattias Nilsson <mattias.i.nilsson@stericsson.com>
Signed-off-by: NMartin Persson <martin.persson@stericsson.com>
Signed-off-by: NPer Fransson <per.xx.fransson@stericsson.com>
Signed-off-by: NJonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: NSebastien Rault <sebastien.rault@stericsson.com>
Signed-off-by: NBengt Jonsson <bengt.g.jonsson@stericsson.com>
Signed-off-by: NRickard Andersson <rickard.andersson@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

We have decided that this function arbiter fits better in the MFD
subsystem. Since we need to concatenate the split header files we move
it basically like this:

mv mach-ux500/prcmu-db8500.c drivers/mfd/db8500-prcmu.c
mv mach-ux500/include/mach/prcmu-defs.h include/linux/mfd/db8500-prcmu.h
mv mach-ux500/include/mach/prcmu-regs.h drivers/mfd/db8500-prcmu-regs.h
mach-ux500/include/mach/prcmu.h >> include/linux/mfd/db8500-prcmu.h
rm arch/arm/mach-ux500/include/mach/prcmu.h

Then we update different #include statements and Makefile orders etc
to make the PRCMU driver compile, link and boot in the new place
without really changing any code.
Acked-by: NSamuel Ortiz <sameo@linux.intel.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This renames the prcmu.c file to prcmu-db8500.c so as to indicate
that it is for this one SoC.
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Adds support in PRCMU driver to handle CPU and APE operating points.
Signed-off-by: NMartin Persson <martin.persson@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com>

Remove the irq number macros which don't specify which SoC they're for.
Signed-off-by: NRabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com>

This patch adds support for db8500 chip version 2.
The TCDM memory address of the PRCMU is changed and
dynamic detection of that is added.
Signed-off-by: NMattias Wallin <mattias.wallin@stericsson.com>
Acked-by: NLinus Walleij <linus.walleij@stericsson.com>

Add an initial driver for communicating with the Power, Reset and
Clock Management Unit (PRCMU) firmware in U8500.
This initial version supports AB8500 communication only.
Signed-off-by: NMattias Nilsson <mattias.i.nilsson@stericsson.com>
Signed-off-by: NMattias Wallin <mattias.wallin@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>