mvebu drivers for 5.6 (part 1)

 - Various cleanup on the following drivers:
   - Turris Mox rWTM firmware
   - Moxtet bus
   - Armada 37xx rWTM mailbox
   - Marvell EBU Device Bus

* tag 'mvebu-drivers-5.6-1' of git://git.infradead.org/linux-mvebu:
  mailbox: armada-37xx-rwtm: convert to devm_platform_ioremap_resource
  memory: mvebu-devbus: convert to devm_platform_ioremap_resource
  bus: moxtet: declare moxtet_bus_type as static
  firmware: turris-mox-rwtm: small white space cleanup

Link: https://lore.kernel.org/r/877e1x3nxc.fsf@FE-laptopSigned-off-by: Olof Johansson <olof@lixom.net>

Merge tag 'tegra-for-5.6-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/drivers

soc: tegra: Changes for v5.6-rc1

This adds a couple of optimizations to how the chip ID and straps are
read and adds support for the FUSE block on Tegra194. Included is also a
small optimization for the coupled regulator driver to abort early if no
voltage change has occurred.

* tag 'tegra-for-5.6-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  soc/tegra: fuse: Unmap registers once they are not needed anymore
  soc/tegra: fuse: Correct straps' address for older Tegra124 device trees
  soc/tegra: fuse: Warn if straps are not ready
  soc/tegra: fuse: Cache values of straps and Chip ID registers
  soc/tegra: regulators: Do nothing if voltage is unchanged
  soc/tegra: fuse: Add APB DMA dependency for Tegra20
  soc/tegra: fuse: Add Tegra194 support

Link: https://lore.kernel.org/r/20200111003553.2411874-4-thierry.reding@gmail.comSigned-off-by: Olof Johansson <olof@lixom.net>

Merge tag 'tegra-for-5.6-memory' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/drivers

memory: tegra: Changes for v5.6-rc1

This adds a couple of fixes for the Tegra30 EMC frequency scaling code
and adds support for EMC frequency scaling on Tegra186 and later.

* tag 'tegra-for-5.6-memory' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  memory: tegra30-emc: Correct error message for timed out auto calibration
  memory: tegra30-emc: Firm up hardware programming sequence
  memory: tegra30-emc: Firm up suspend/resume sequence
  memory: tegra: Correct reset value of xusb_hostr
  memory: tegra: Add support for the Tegra194 memory controller
  memory: tegra: Only include support for enabled SoCs
  memory: tegra: Support DVFS on Tegra186 and later
  memory: tegra: Add system sleep support
  memory: tegra: Extract memory client SID programming
  memory: tegra: Add per-SoC data for Tegra186
  memory: tegra: Rename tegra_mc to tegra186_mc on Tegra186
  memory: tegra: Implement EMC debugfs interface on Tegra30
  memory: tegra: Implement EMC debugfs interface on Tegra20
  memory: tegra: Refashion EMC debugfs interface on Tegra124

Link: https://lore.kernel.org/r/20200111003553.2411874-3-thierry.reding@gmail.comSigned-off-by: Olof Johansson <olof@lixom.net>

Merge tag 'tegra-for-5.6-bus' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/drivers

bus: tegra: Changes for v5.6-rc1

Contains a single fix to remove a Kconfig dependency that's no longer
required.

* tag 'tegra-for-5.6-bus' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  bus: tegra-aconnect: Remove PM_CLK dependency

Link: https://lore.kernel.org/r/20200111003553.2411874-2-thierry.reding@gmail.comSigned-off-by: Olof Johansson <olof@lixom.net>

Merge tag 'samsung-drivers-5.6' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into arm/drivers

Samsung soc drivers changes for v5.6

1. Convert to managed (devm_x()) versions,
2. Cleanups (Samsung and Exynos names).

* tag 'samsung-drivers-5.6' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux:
  memory: samsung: Rename Exynos to lowercase
  soc: samsung: Rename Samsung and Exynos to lowercase
  memory: samsung: exynos5422-dmc: Convert to devm_platform_ioremap_resource
  soc: samsung: exynos-pmu: Convert to devm_platform_ioremap_resource

Link: https://lore.kernel.org/r/20200110172334.4767-2-krzk@kernel.orgSigned-off-by: Olof Johansson <olof@lixom.net>

Reset controller updates for v5.6

This tag adds support for the Nuvoton NPCM, Intel Gatway SoC, and
Broadcom BCM7216 RESCAL reset controllers, adds missing SCSSI reset
controls for newer Uniphier SoCs, aligns the program flow in the
devm_reset_controller_register, __devm_reset_control_get, and
devm_reset_control_array_get functions for better consistency,
and allows to build the Qcom AOSS reset driver as a module.

This is based on v5.5-rc3 because the core patch depends on commit
db238086 ("reset: Do not register resource data for missing
resets").

* tag 'reset-for-5.6' of git://git.pengutronix.de/pza/linux:
  reset: qcom-aoss: Allow CONFIG_RESET_QCOM_AOSS to be a tristate
  reset: Add Broadcom STB RESCAL reset controller
  dt-bindings: reset: Document BCM7216 RESCAL reset controller
  reset: intel: Add system reset controller driver
  dt-bindings: reset: Add YAML schemas for the Intel Reset controller
  reset: uniphier: Add SCSSI reset control for each channel
  reset: Align logic and flow in managed helpers
  reset: npcm: add NPCM reset controller driver
  dt-bindings: reset: Add binding constants for NPCM7xx reset controller
  dt-bindings: reset: add NPCM reset controller documentation

Link: https://lore.kernel.org/r/dbbb2ca7490a0146d9ba632fd4d9f38063e03e9f.camel@pengutronix.deSigned-off-by: Olof Johansson <olof@lixom.net>

This pull request contains Broadcom ARM/ARM64/MIPS-based SoCs drivers
changes for 5.6, please pull the following:

- Florian provides a set of updates to the Bus Interface Unit control to
  tune it appropriately for the most recent chips: 7255, 7260, 7216, 7211

* tag 'arm-soc/for-5.6/drivers' of https://github.com/Broadcom/stblinux:
  soc: bcm: brcmstb: biuctrl: Update programming for 7211
  soc: bcm: brcmstb: biuctrl: Update layout for A72 on 7211
  soc: bcm: brcmstb: biuctrl: Tune interface for 7255 and 7216
  soc: bcm: brcmstb: biuctrl: Tune 7260 BIU interface

Link: https://lore.kernel.org/r/20200108191114.15987-2-f.fainelli@gmail.comSigned-off-by: Olof Johansson <olof@lixom.net>

Both Chip ID and strapping registers are now read out during of APB MISC
initialization, the registers' mapping isn't needed anymore once registers
are read. Hence let's unmap registers once they are not needed anymore,
for consistency.
Suggested-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

Trying to read out Chip ID before APBMISC registers are mapped won't
succeed, in a result Tegra124 gets a wrong address for the HW straps
register if machine uses an old outdated device tree.

Fixes: 297c4f3d ("soc/tegra: fuse: Restrict legacy code to 32-bit ARM")
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

Now both Chip ID and HW straps are becoming available at the same time,
thus we could simply check the availability of the ID in order to check
the availability of the straps. We couldn't check straps for 0x0 because
it could be a correct value.

This change didn't uncover any problems, but anyways it is nicer to have
straps verified for consistency with the Chip ID verification.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

There is no need to re-read Chip ID and HW straps out from hardware each
time, it is a bit nicer to cache the values in memory.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

The code waits for auto calibration to be finished and not to be disabled.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

Previously there was a problem where a late handshake handling caused
a memory corruption, this problem was resolved by issuing calibration
command right after changing the timing, but looks like the solution
wasn't entirely correct since calibration interval could be disabled as
well. Now programming sequence is completed immediately after receiving
handshake from CaR, without potentially long delays and in accordance to
the TRM's programming guide.

Secondly, the TRM's programming guide suggests to flush EMC writes by
reading any *MC* register before doing CaR changes. This is also addressed
now.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

The current code doesn't prevent race conditions of suspend/resume vs CCF.
Let's take exclusive control over the EMC clock during suspend in a way
that is free from race conditions.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

There is no need to re-apply the same voltage. This change is just a minor
cleanup.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

According to Tegra X1 (Tegra210) TRM, the reset value of xusb_hostr
field (bit [7:0]) should be 0x7a. So this patch simply corrects it.
Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

Tegra20 FUSE driver depends on DMA channel presence, otherwise it fails to
probe.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

The ACONNECT bus driver does not use pm-clk interface anymore and hence
the dependency can be removed from its Kconfig option.

Fixes: 0d7dab92 ("bus: tegra-aconnect: use devm_clk_*() helpers")
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

The memory and external memory controllers on Tegra194 are very similar
to their predecessors from Tegra186. Add the necessary SoC-specific data
to support the newer versions.
Signed-off-by: Thierry Reding <treding@nvidia.com>

The memory client tables can be fairly large and they can easily be
omitted if support for the corresponding SoC is not enabled.
Signed-off-by: Thierry Reding <treding@nvidia.com>

Add a Tegra186 (and later) EMC driver that reads the EMC DVFS tables
from BPMP and uses the EMC clock to change the external memory clock.

This currently only provides a debugfs interface to show the available
frequencies and set lower and upper limits of the allowed range. This
can be used for testing the various frequencies. The goal is to
eventually integrate this with the interconnect framework so that the
EMC frequency can be scaled based on demand from memory clients.
Signed-off-by: Thierry Reding <treding@nvidia.com>

This commit adds Tegra194 fuse/apbmisc support.
Signed-off-by: JC Kuo <jckuo@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

Add system suspend/resume support for the memory controller found on
Tegra186 and later. This is required so that the SID registers can be
reprogrammed after their content was lost during system sleep.
Signed-off-by: Thierry Reding <treding@nvidia.com>

Move programming of the memory client to SID mapping into a separate
function so that it can be reused from multiple call sites.
Signed-off-by: Thierry Reding <treding@nvidia.com>

Instead of hard-coding the memory client table, use per-SoC data in
preparation for adding support for other SoCs.
Signed-off-by: Thierry Reding <treding@nvidia.com>

This is just for consistency with the rest of the driver.
Signed-off-by: Thierry Reding <treding@nvidia.com>

A common debugfs interface is already available on Tegra20, Tegra124,
Tegra186 and Tegra194. Implement the same interface on Tegra30 to enable
testing of the EMC frequency scaling code using a unified interface.
Signed-off-by: Thierry Reding <treding@nvidia.com>

A common debugfs interface is already available on Tegra124, Tegra186
and Tegra194. Implement the same interface on Tegra20 to enable testing
of the EMC frequency scaling code using a unified interface.
Signed-off-by: Thierry Reding <treding@nvidia.com>

The current debugfs interface is only partially useful. While it allows
listing supported frequencies and testing individual clock rates, it is
limited in that it can't be used to restrict the range of frequencies
that the driver is allowed to set. This is something we may want to use
to test adaptive scaling once that's implemented.
Signed-off-by: Thierry Reding <treding@nvidia.com>

Merge tag 'cpuidle_psci-v5.5-rc4' of git://git.linaro.org/people/ulf.hansson/linux-pm into arm/drivers

Initial support for hierarchical CPU arrangement, managed by PSCI and its
corresponding cpuidle driver. This support is based upon using the generic
PM domain, which already supports devices belonging to CPUs.

Finally, these is a DTS patch that enables the hierarchical topology to be
used for the Qcom 410c Dragonboard, which supports the PSCI OS-initiated
mode.

* tag 'cpuidle_psci-v5.5-rc4' of git://git.linaro.org/people/ulf.hansson/linux-pm: (611 commits)
  arm64: dts: Convert to the hierarchical CPU topology layout for MSM8916
  cpuidle: psci: Add support for PM domains by using genpd
  PM / Domains: Introduce a genpd OF helper that removes a subdomain
  cpuidle: psci: Support CPU hotplug for the hierarchical model
  cpuidle: psci: Manage runtime PM in the idle path
  cpuidle: psci: Prepare to use OS initiated suspend mode via PM domains
  cpuidle: psci: Attach CPU devices to their PM domains
  cpuidle: psci: Add a helper to attach a CPU to its PM domain
  cpuidle: psci: Support hierarchical CPU idle states
  cpuidle: psci: Simplify OF parsing of CPU idle state nodes
  cpuidle: dt: Support hierarchical CPU idle states
  of: base: Add of_get_cpu_state_node() to get idle states for a CPU node
  firmware: psci: Export functions to manage the OSI mode
  dt: psci: Update DT bindings to support hierarchical PSCI states
  cpuidle: psci: Align psci_power_state count with idle state count
  Linux 5.5-rc4
  locks: print unsigned ino in /proc/locks
  riscv: export flush_icache_all to modules
  riscv: reject invalid syscalls below -1
  riscv: fix compile failure with EXPORT_SYMBOL() & !MMU
  ...

Link: https://lore.kernel.org/r/20200102160820.3572-1-ulf.hansson@linaro.orgSigned-off-by: Olof Johansson <olof@lixom.net>

Use devm_platform_ioremap_resource() to simplify code.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

Use devm_platform_ioremap_resource() to simplify code.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

This symbol is not meant to be used from elsewhere.

Cc: Ben Dooks <ben.dooks@codethink.co.uk>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

This patch deletes a stray tab.

Cc: Gregory CLEMENT <gregory.clement@bootlin.com>
Cc: Colin King <colin.king@canonical.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

Allow CONFIG_RESET_QCOM_AOSS to be set as as =m to allow for the
driver to be loaded from a modules.

Also replaces the builtin_platform_driver() line with
module_platform_driver() and adds a MODULE_DEVICE_TABLE() entry.

Cc: Todd Kjos <tkjos@google.com>
Cc: Alistair Delva <adelva@google.com>
Cc: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

Fix up inconsistent usage of upper and lowercase letters in "Exynos"
name.

"EXYNOS" is not an abbreviation but a regular trademarked name.
Therefore it should be written with lowercase letters starting with
capital letter.

The lowercase "Exynos" name is promoted by its manufacturer Samsung
Electronics Co., Ltd., in advertisement materials and on website.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Fix up inconsistent usage of upper and lowercase letters in "Samsung"
and "Exynos" names.

"SAMSUNG" and "EXYNOS" are not abbreviations but regular trademarked
names.  Therefore they should be written with lowercase letters starting
with capital letter.

The lowercase "Exynos" name is promoted by its manufacturer Samsung
Electronics Co., Ltd., in advertisement materials and on website.

Although advertisement materials usually use uppercase "SAMSUNG", the
lowercase version is used in all legal aspects (e.g. on Wikipedia and in
privacy/legal statements on
https://www.samsung.com/semiconductor/privacy-global/).
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Merge tag 'renesas-drivers-for-v5.6-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel into arm/drivers

Renesas driver updates for v5.6

  - Remove now unused ARCH_R8A7796 config symbol,
  - Fix a sparse warning,
  - Add split R-Car H3 ES1.x and ES2.0+ config symbols.

* tag 'renesas-drivers-for-v5.6-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel:
  soc: renesas: Add ARCH_R8A7795[01] for existing R-Car H3
  soc: renesas: rcar-rst: Fix __iomem on configure call
  soc: renesas: Remove ARCH_R8A7796

Link: https://lore.kernel.org/r/20200106104857.8361-5-geert+renesas@glider.beSigned-off-by: Olof Johansson <olof@lixom.net>

Merge tag 'tee-optee-pldrv-for-5.6' of git://git.linaro.org:/people/jens.wiklander/linux-tee into arm/drivers

Model OP-TEE as a platform device/driver

* tag 'tee-optee-pldrv-for-5.6' of git://git.linaro.org:/people/jens.wiklander/linux-tee:
  optee: model OP-TEE as a platform device/driver

Link: https://lore.kernel.org/r/20200103090025.GA11243@jaxSigned-off-by: Olof Johansson <olof@lixom.net>

Merge tag 'scmi-updates-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into arm/drivers

ARM SCMI updates for v5.6

1. Addition of multiple device support per protocol to enable use of
   some procotols by multiple kernel subsystems simultaneously and
   corresponding updates to the existing scmi drivers
2. Addition of trace events around the scmi transfer code to measure
   any delays and capture anomalies that can also be used during
   investigation of some platform firmware related issues

* tag 'scmi-updates-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux:
  drivers: firmware: scmi: Extend SCMI transport layer by trace events
  include: trace: Add SCMI header with trace events
  reset: reset-scmi: Match scmi device by both name and protocol id
  hwmon: (scmi-hwmon) Match scmi device by both name and protocol id
  cpufreq: scmi: Match scmi device by both name and protocol id
  clk: scmi: Match scmi device by both name and protocol id
  firmware: arm_scmi: Skip protocol initialisation for additional devices
  firmware: arm_scmi: Stash version in protocol init functions
  firmware: arm_scmi: Match scmi device by both name and protocol id
  firmware: arm_scmi: Add versions and identifier attributes using dev_groups
  firmware: arm_scmi: Add names to scmi devices created
  firmware: arm_scmi: Skip scmi mbox channel setup for addtional devices
  firmware: arm_scmi: Add support for multiple device per protocol

Link: https://lore.kernel.org/r/20191230182956.GA29349@bogusSigned-off-by: Olof Johansson <olof@lixom.net>