There's no need to probe devices until at module_init time and we
currently have at least PM trying to use I2C for PMICs early on.

As only a part of the SoC init_early is SoC specific, we only need to call
the SoC specific PM init function. And we can modify omap2_common_pm_late_init()
so it becomes a late_initcall().

Note that this changes am335x to call omap2_clk_enable_autoidle_all() that
seems to be missing currently.

Cc: Keerthy <j-keerthy@ti.com>
Cc: Tero Kristo <t-kristo@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Looks like these functions don't do anything in the mainline kernel so
we can just drop it.

Note that we must now also remove ir-rx51 pdata as it relies on the dummy
platform data that does not do anything. And ir-rx51 is calling a pdata
callback that doesn't do anything without checking if it exists first.

For configuring device specific minimal latencies, the interface to use
is pm_qos_add_request(). For an example, see what was done in commit
9834ffd1 ("ASoC: omap-mcbsp: Add PM QoS support for McBSP to prevent
glitches"). I've added some comments to ir-rx51 so people using it can
add pm_qos support and test it.

Cc: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Cc: Kevin Hilman <khilman@kernel.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Most of the PM code needed for am335x and am437x can be moved into a
module under drivers but some core code must remain in mach-omap2 at the
moment. This includes some internal clockdomain APIs and low-level ARM
APIs which are also not exported for use by modules.

Implement a few functions that handle these low-level platform
operations can be passed to the pm33xx module through the use of
platform data.

In addition to this, to be able to share data structures between C and
the sleep33xx and sleep43xx assembly code, we can automatically generate
all of the C struct member offsets and sizes as macros by processing
pm-asm-offsets.c into assembly code and then extracting the relevant
data as is done for the generated platform asm-offsets.h files.

Finally, add amx3_common_pm_init to create a dummy platform_device for
pm33xx so that our soon to be introduced pm33xx module can probe on
am335x and am437x platforms to enable basic suspend to mem and standby
support.
Signed-off-by: NDave Gerlach <d-gerlach@ti.com>
Acked-by: NSantosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: NTony Lindgren <tony@atomide.com>

SoC device attributes are registered with a call to
soc_device_register() from the machine .init_late() operation, which is
called from the late initcall, after all drivers built-in drivers have
been probed. This results in the impossibility for drivers to use SoC
device matching in their probe function.

The omap_soc_device_init() function is safe to call from the machine
.init() operation, as all data it depends on is initialized from the
.init_early() operation. Move SoC device attribute registration to
machine .init() like on all other ARM platforms.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

The omap_generic_init() and omap_hwmod_init_postsetup() functions are
used in the initialization for all OMAP2+ SoC types, but in the
extreme case that those are all disabled, we get a warning about
unused code:

arch/arm/mach-omap2/io.c:412:123: error: 'omap_hwmod_init_postsetup' defined but not used [-Werror=unused-function]
arch/arm/mach-omap2/board-generic.c:30:123: error: 'omap_generic_init' defined but not used [-Werror=unused-function]

This annotates both as __maybe_unused to shut up that warning.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NTony Lindgren <tony@atomide.com>
Reviewed-by: NSebastian Reichel <sebastian.reichel@collabora.co.uk>

We are now booting all mach-omap2 in device tree only mode.
Any code that is only called in legacy boot mode where
of_have_populated_dt() is not set is safe to remove now.
Reviewed-by: NSebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: NTony Lindgren <tony@atomide.com>

All the boards booting with device tree use
drivers/pinctrl-single.c instead.

Note that mach-omap1 is still using the legacy mux,
so let's move the related Kconfig options from plat-omap
to mach-omap1.
Signed-off-by: NTony Lindgren <tony@atomide.com>

We need to properly initialize mpuss also on omap5 like we do on omap4.
Otherwise we run into similar kexec problems like we had on omap4 when
trying to kexec from a kernel with PM initialized.

Fixes: 0573b957 ("ARM: OMAP4+: Prevent CPU1 related hang with kexec")
Acked-by: NSantosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Kexec booted kernels on omap4 will hang early during the boot if the
booted kernel is different version from the previous kernel.

This is because the previous kernel may have configured low-power mode
using CPU1_WAKEUP_NS_PA_ADDR. In that case it points to the previous
kernel's omap4_secondary_startup(), and CPU1 can be in low power mode
from the previous kernel. When the new kernel configures the CPU1
clockdomain, CPU1 can wake from low power state prematurely during
omap44xx_clockdomains_init() running random code.

Let's fix the issue by configuring CPU1_WAKEUP_NS_PA_ADDR before we
call omap44xx_clockdomains_init(). Note that this is very early during
the init, and we will do proper CPU1 reset during SMP init a bit later
on in omap4_smp_prepare_cpus(). And we need to do this when SMP is
not enabled as the previous kernel may have had it enabled.
Acked-by: NSantosh Shilimkar <ssantosh@kernel.org>
Tested-by: NKeerthy <j-keerthy@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Prepare things for making kexec work on SMP omap variants by initializing
SARM RAM base early. This allows us to configure CPU1 for kexec in case
the previous kernel has put CPU1 in low power mode.

Note that this should not prevent moving other SAR RAM code to live
under drivers. However for kexec, we will need this very early.
Acked-by: NSantosh Shilimkar <ssantosh@kernel.org>
Tested-by: NKeerthy <j-keerthy@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

When commit 06c2d368 ("ARM: OMAP: DRA7: Make use of omap_revision
information for soc_is* calls") introduced SoC check using
omap_revision, it missed providing DRA7 as class for initializing
the omap_version variable. Without doing this, soc_is_dra7xx() will
fail and as a result, omap4_pm_init_early never initializes the dra7
erratum for CPU power state. This causes the suspend path to fail
on DRA7 devices.

Fixes: 06c2d368 ("ARM: OMAP: DRA7: Make use of omap_revision information for soc_is* calls")
Signed-off-by: NNishanth Menon <nm@ti.com>
Tested-by: NKeerthy <j-keerthy@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

The following commits:
commit 3fa60975 ("ARM: omap2: restore OMAP4 barrier behaviour")
commit f746929f ("Revert "ARM: OMAP4: remove dead kconfig option OMAP4_ERRATA_I688"")
and
commit ea827ad5 ("ARM: DRA7: Provide proper IO map table")
came in around the same time, unfortunately this seem to have missed
initializing the barrier for DRA7 platforms - omap5_map_io was reused
for dra7 till it was split out by the last patch. barrier_init
needs to be hence carried forward as it is valid for DRA7 family of
processors as they are for OMAP5.

Fixes: ea827ad5 ("ARM: DRA7: Provide proper IO map table")
Cc: stable@vger.kernel.org # v4.1+
Reported-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Reported-by: NTomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NNishanth Menon <nm@ti.com>
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

We have never had dm814x booting properly with mainline kernel using
the legacy platform data based booting. Current minimal support is
device tree only.
Signed-off-by: NTony Lindgren <tony@atomide.com>

Add omap2_clk_enable_autoidle_all to am43xx_init_late otherwise the call
to omap2_clk_disable_autoidle_all in am43xx_init_early may cause some
clocks to always stay active and prevent low power mode transitions.
Signed-off-by: NDave Gerlach <d-gerlach@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

This reverts commit 606da482.

We actually need this code for proper behaviour of OMAP4, and it needs
fixing a different way other than just removing the code.  Disabling
code which is necessary in the hopes of persuing multiplatform kernels
is a stupid approach.
Acked-by: NTony Lindgren <tony@atomide.com>
Acked-by: NRichard Woodruff <r-woodruff2@ti.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Let's add minimal set of dm814x hwmods to have a bootable system.

Cc: Matthijs van Duin <matthijsvanduin@gmail.com>
Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Let's add a minimal clocks for dm814x to get it booted. This is
mostly a placeholder and relies on the PLLs being on from the
bootloader.

Note that the divider clocks work the same way as on dm816x and
am335x.

Cc: Matthijs van Duin <matthijsvanduin@gmail.com>
Cc: Mike Turquette <mturquette@linaro.org>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Tero Kristo <t-kristo@ti.com>
Acked-by: NStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: NTony Lindgren <tony@atomide.com>

For now, let's just add the ones shared with dm816x.
The dm814x specific ones can be added as they are tested.

Cc: Matthijs van Duin <matthijsvanduin@gmail.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Tero Kristo <t-kristo@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

DRA7 uses OMAP5 IO table at the moment. This is purely spurious since
the OMAP5 and DRA7 register maps are different in many aspects.

AM57xx/DRA7 TRM Reference: http://www.ti.com/lit/ug/spruhz6/spruhz6.pdf

NOTE: Most of the drivers are already doing ioremap, so, there should'nt
be any functional improvement involved here, other than making the
initial iotable more accurate.

Fixes: a3a9384a ("ARM: DRA7: Reuse io tables and add a new .init_early")
Signed-off-by: NNishanth Menon <nm@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

We should avoid exporting data from drivers, instead use an API for
registering the clock low level operations.
Signed-off-by: NTero Kristo <t-kristo@ti.com>

This is not needed for anything anymore, so remove it completely.
Signed-off-by: NTero Kristo <t-kristo@ti.com>

OMAP4, OMAP5 and DRA7 now parse DT entries for control module address spaces,
and set up syscon mappings appropriately. Low level IO init is updated to
remove the legacy control module mappings for these devices also.
Signed-off-by: NTero Kristo <t-kristo@ti.com>

omap4_ctrl_pad_readl/writel are no longer used by anybody, so remove
these. Syscon / pinctrl should be used to access the padconf area
instead.
Signed-off-by: NTero Kristo <t-kristo@ti.com>

This gets rid of need for some exported driver APIs, and simplifies the
initialization of the CM driver. Done in preparation to make CM a
separate driver. The init data is now also passed to the SoC specific
implementations, allowing future expansion to add feature flags etc.
Signed-off-by: NTero Kristo <t-kristo@ti.com>

This gets rid of need for some exported driver APIs, and simplifies the
initialization of the PRM driver. Done in preparation to make PRM a
separate driver. The init data is now also passed to the SoC specific
implementations, allowing future expansion to add feature flags etc.
Signed-off-by: NTero Kristo <t-kristo@ti.com>

There is no need to provide the control module base address through a
low-level API from the low-level IO init, as this information is
available through DT. This patch adds a new API to initialize the
control module though, but mostly makes the old API obsolete. The
old API can be completely removed once OMAP3 is made DT only.
Signed-off-by: NTero Kristo <t-kristo@ti.com>

There is no need to provide the PRM base address through a low-level API
from the low-level IO init, as this information is available through DT.
Re-routed the parsing function to be called from the PRM drivers also to
simplify the implementation under io.c.
Signed-off-by: NTero Kristo <t-kristo@ti.com>

There is no need to provide the CM base address through a low-level API
from the low-level IO init, as this information is available through DT.
Re-routed the parsing function to be called from the CM drivers also to
simplify the implementation under io.c.
Signed-off-by: NTero Kristo <t-kristo@ti.com>

Splits the clock related provider module inits under their own driver files.
Previously this was done for all modules under the common PRM driver.
Signed-off-by: NTero Kristo <t-kristo@ti.com>

OMAP4 has different ordering of PRM and CM init calls in the early init.
Re-oder these accordingly for OMAP4 also. This is needed so that we
can do some optimizations in the following patches for the PRCM init.
Signed-off-by: NTero Kristo <t-kristo@ti.com>

There is no need to call this separately from io.c, rather this can be
done commonly under the CM driver. Also, this patch makes the API static,
as it is no longer used outside the driver file.
Signed-off-by: NTero Kristo <t-kristo@ti.com>

There is no need to call this separately from io.c, rather this can be
done commonly under the PRM driver.
Signed-off-by: NTero Kristo <t-kristo@ti.com>

This avoids conflicts in the global namespace, and is more descriptive
of the purpose anyway.
Signed-off-by: NTero Kristo <t-kristo@ti.com>

The Kconfig-Option OMAP4_ERRATA_I688 is never visible due to a
contradiction in it's dependencies.
The option requires ARCH_MULTIPLATFORM to be 'disabled'. However, an
enclosing menu requires either ARCH_MULTI_V6 or ARCH_MULTI_V7 to be
enabled. These options inherit a dependency from an enclosing menu,
that requires ARCH_MULTIPLATFORM to be 'enabled'.
This is a contradiction and made this option also unavailable for
non-multiplatform configurations.

Since there are no selects on OMAP4_ERRATA_I688, which would ignore
dependencies, the code related to that option is dead and can be
removed.

This (logical) defect has been found with the undertaker tool.
(https://undertaker.cs.fau.de)
Signed-off-by: NStefan Hengelein <stefan.hengelein@fau.de>
Acked-by: NSantosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: NTony Lindgren <tony@atomide.com>

As the clock data is now available for the legacy boot also from the
clock driver, use this rather than the data under the mach folder.
This allows us to get rid of the old clock data completely.
Signed-off-by: NTero Kristo <t-kristo@ti.com>
Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NMichael Turquette <mturquette@linaro.org>

Add minimal hwmod support that works at least on dm8168. This
is based on the code in the earlier TI CDP tree, and an earlier
patch by Aida Mynzhasova <aida.mynzhasova@skitlab.ru>.

I've set up things to work pretty much the same way as for
am33xx. We are basically using cm33xx.c with a different set
of clocks and clockdomains.

This code is based on the TI81XX-LINUX-PSP-04.04.00.02 patches
published at:

http://downloads.ti.com/dsps/dsps_public_sw/psp/LinuxPSP/TI81XX_04_04/04_04_00_02/index_FDS.html

Cc: Aida Mynzhasova <aida.mynzhasova@skitlab.ru>
Cc: Brian Hutchinson <b.hutchman@gmail.com>
Acked-by: NPaul Walmsley <paul@pwsan.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

This patch adds required definitions and structures for clockdomain
initialization, so omap3xxx_clockdomains_init() was substituted by
new ti81xx_clockdomains_init() while early initialization of
TI81XX platform.

Note that we now need to have 81xx in a separate CONFIG_SOC_TI81XX
block instead inside the ifdef block for omap3 to avoid make
randconfig build errors.

This code is based on the TI81XX-LINUX-PSP-04.04.00.02 patches
published at:

http://downloads.ti.com/dsps/dsps_public_sw/psp/LinuxPSP/TI81XX_04_04/04_04_00_02/index_FDS.html

Cc: Brian Hutchinson <b.hutchman@gmail.com>
Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: NAida Mynzhasova <aida.mynzhasova@skitlab.ru>
[tony@atomide.com: updated to apply, renamed to clockdomains81xx.c,
 fixed to use am33xx_clkdm_operations, various fixes suggested by
 Paul Walmsley]
Reviewed-by: NPaul Walmsley <paul@pwsan.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

We cannot use the omap3 pm support on 81xx.

Cc: Brian Hutchinson <b.hutchman@gmail.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Otherwise it will return true for cpu_is_omap34xx() which we don't
want for the clocks and hwmod. It's closer to am33xx for the clocks
and hwmod than to the omap34xx. We also want to be able to detect
814x and 816x separately as at least the clocks are different with
814x using a apll and 816x using a fapll for the source clocks.

Note that we can also remove omap3xxx_clk_init() call as it's wrong
and ti81xx are booting in device tree only mode.

Cc: Brian Hutchinson <b.hutchman@gmail.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

After commit b2b49ccb (PM: Kconfig: Set PM_RUNTIME if PM_SLEEP is
selected) PM_RUNTIME is always set if PM is set, so #ifdef blocks
depending on CONFIG_PM_RUNTIME may now be changed to depend on
CONFIG_PM.

Replace CONFIG_PM_RUNTIME with CONFIG_PM everywhere in the code under
arch/arm/ (the defconfig files will be modified later).
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: NNishanth Menon <nm@ti.com>
Acked-by: NSekhar Nori <nsekhar@ti.com>
Acked-by: NSantosh Shilimkar <ssantosh@kernel.org>