Merge tag 'tee-drv-dynamic-shm+fixes-for-v4.16' of https://git.linaro.org/people/jens.wiklander/linux-tee into next/drivers

This pull request updates the previous tee-drv-dynamic-shm-for-v4.16 pull
request with five new patches fixing review comments and errors.

Apart from three small fixes there's two larger patches that in the end
checks that memory to be registered really is normal cached memory.

* tag 'tee-drv-dynamic-shm+fixes-for-v4.16' of https://git.linaro.org/people/jens.wiklander/linux-tee:
  tee: shm: Potential NULL dereference calling tee_shm_register()
  tee: shm: don't put_page on null shm->pages
  tee: shm: make function __tee_shm_alloc static
  tee: optee: check type of registered shared memory
  tee: add start argument to shm_register callback
Signed-off-by: Olof Johansson <olof@lixom.net>

linux-4.15 warns about missing MODULE_LICENSE tags such as these

WARNING: modpost: missing MODULE_LICENSE() in drivers/bus/omap_l3_noc.o
WARNING: modpost: missing MODULE_LICENSE() in drivers/bus/omap_l3_smx.o

For completeness, I'm also adding MODULE_AUTHOR and MODULE_DESCRIPTION
tags, but I decided to leave out the email addresses, as all three
authors are working for other companies now.

Cc: Sricharan R <sricharan@codeaurora.org>
Cc: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

Merge tag 'samsung-drivers-4.16-2' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into next/drivers

Samsung soc drivers changes for v4.16

Add SPDX license identifiers.

* tag 'samsung-drivers-4.16-2' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux:
  soc: samsung: Add SPDX license identifiers
Signed-off-by: Olof Johansson <olof@lixom.net>

After moving the SoC device initialization to an early initcall in
commit f780429a ("soc: brcmstb: biuctrl: Move to early_initcall"),
the Broadcom STB SoC device is registered on all platforms if support
for the device is enabled in the kernel configuration.

This causes an additional SoC device to appear on platforms that already
register a native one. In case of Tegra the STB SoC device is registered
as soc0 (with totally meaningless content in the sysfs attributes) and
causes various scripts and programs to fail because they don't know how
to parse that data.

To fix this, duplicate the check from brcmstb_soc_device_early_init()
that already prevents the code from doing anything nonsensical on non-
STB platforms.

Fixes: f780429a ("soc: brcmstb: biuctrl: Move to early_initcall")
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

get_user_pages_fast() can return zero in certain error paths.  We should
handle that or else it means we accidentally return ERR_PTR(0) which is
NULL instead of an error pointer.  The callers are not expecting that
and will crash with a NULL dereference.

Fixes: 033ddf12 ("tee: add register user memory")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

Merge tag 'imx-drivers-4.16' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into next/drivers

Pull "i.MX drivers update for 4.16" from Shawn Guo:
 - Update i.MX GPC driver to support PCI power domain of i.MX6SX SoC.

* tag 'imx-drivers-4.16' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  soc: imx: gpc: Add i.MX6SX PCI power domain

Pull "Reset controller changes for v4.16" from Philipp Zabel:

This adds Meson-AXG reset support and fixes a few issues with the reset
include header: device_reset_optional is fixed to be really optional,
unused headers are pruned, and useless warnings and deprecated API calls
are removed.

* tag 'reset-for-4.16' of git://git.pengutronix.de/git/pza/linux:
  reset: meson-axg: add compatible string for Meson-AXG SoC
  dt-bindings: reset: Add bindings for the Meson-AXG SoC Reset Controller
  reset: remove reset_control_get(_optional)
  reset: minimize the number of headers included from <linux/reset.h>
  reset: remove remaining WARN_ON() in <linux/reset.h>
  reset: make device_reset_optional() really optional

Merge tag 'qcom-drivers-for-4.16' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/agross/linux into next/drivers

Pull "Qualcomm ARM Based Driver Updates for v4.16 - Redo" from Andy Gross:

* Fix error handling code in SMP2P probe
* Update SMP2P to use ACPS as mailbox client
* Add QMI support
* Fixups for Qualcomm SCM
* Fix licensing on rmtfs_mem
* Correct SMSM child node lookup
* Populate firmware nodes during platform init

* tag 'qcom-drivers-for-4.16' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/agross/linux:
  of: platform: populate /firmware/ node from of_platform_default_populate_init()
  soc: qcom: smp2p: Use common error handling code in qcom_smp2p_probe()
  soc: qcom: Introduce QMI helpers
  soc: qcom: Introduce QMI encoder/decoder
  firmware: qcom_scm: Add dependent headers to qcom_scm.h
  soc: qcom: smp2p: Access APCS as mailbox client
  soc: qcom: rmtfs_mem: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE
  soc: qcom: smsm: fix child-node lookup
  firmware: qcom_scm: drop redandant of_platform_populate

Merge tag 'at91-ab-4.16-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux into next/drivers

drivers for 4.16

 - use PTR_ERR_OR_ZERO were relevant in at91_cf

* tag 'at91-ab-4.16-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux:
  pcmcia: at91_cf: Use PTR_ERR_OR_ZERO()
Signed-off-by: Olof Johansson <olof@lixom.net>

Merge tag 'keystone_driver_soc_for_4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone into next/drivers

SOC: Keystone Soc driver updates for 4.16

 - TI EMIF-SRAM driver
 - TI SCI print format fix
 - Navigator strndup lenth fix

* tag 'keystone_driver_soc_for_4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone:
  soc: ti: fix max dup length for kstrndup
  firmware: ti_sci: Use %zu for size_t print format
  memory: ti-emif-sram: remove unused variable
  memory: ti-emif-sram: introduce relocatable suspend/resume handlers
  Documentation: dt: Update ti,emif bindings
Signed-off-by: Olof Johansson <olof@lixom.net>

Merge tag 'omap-for-v4.16/ti-sysc-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/drivers

TI sysc driver updates for v4.16 merge window

We now have gotten ti-sysc driver to the point where it can parse
interconnect target configuration from device tree instead of the
legacy platform data. This series updates the device tree binding
and adds parsing to the driver for quirks and capabilities.

* tag 'omap-for-v4.16/ti-sysc-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  bus: ti-sysc: Add parsing of module capabilities
  bus: ti-sysc: Handle module quirks based dts configuration
  bus: ti-sysc: Detect i2c interconnect target module based on register layout
  bus: ti-sysc: Add register bits for interconnect target modules
  bus: ti-sysc: Make omap_hwmod_sysc_fields into sysc_regbits platform data
  ARM: OMAP2+: Move all omap_hwmod_sysc_fields to omap_hwmod_common_data.c
  ARM: dts: Add generic ti,sysc compatible in addition to the custom ones
  dt-bindings: ti-sysc: Update binding for timers and capabilities
Signed-off-by: Olof Johansson <olof@lixom.net>

Merge tag 'actions-drivers-for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/afaerber/linux-actions into next/drivers

Actions Semi SoC drivers for v4.16

The SPS power domain driver is extended for S700 SoC.

* tag 'actions-drivers-for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/afaerber/linux-actions:
  soc: actions: sps: Add S700
Signed-off-by: Olof Johansson <olof@lixom.net>

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

- Arnd provides an update to the Raspberry Pi firmware interface and uses time64_t to
  print the time to make it more future proof

- Florian provides a set of updates to make the Broadcom STB Bus Interface Unit code
  work on newer ARM64-based chips, as well as perform the correct interface tuning
  for these chips to reach the expected performance

* tag 'arm-soc/for-4.16/drivers' of http://github.com/Broadcom/stblinux:
  soc: brcmstb: biuctrl: Move to early_initcall
  soc: brcmstb: Split initialization
  soc: brcmstb: biuctrl: Fine tune B53 MCP interface settings
  soc: brcmstb: biuctrl: Wire-up new registers
  soc: brcmstb: biuctrl: Prepare for saving/restoring other registers
  soc: brcmstb: Correct CPU_CREDIT_REG offset for Brahma-B53 CPUs
  soc: brcmstb: Make CPU credit offset more parameterized
  dt-bindings: arm: brcmstb: Correct BIUCTRL node documentation
  dt-bindings: arm: Add entry for Broadcom Brahma-B53
  firmware: raspberrypi: print time using time64_t
Signed-off-by: Olof Johansson <olof@lixom.net>

Since "/firmware" does not have its own "compatible" property as it's
just collection of nodes representing firmware interface, it's sub-nodes
are not populated during system initialization.

Currently different firmware drivers search the /firmware/ node and
populate the sub-node devices selectively. Instead we can populate
the /firmware/ node during init to avoid more drivers continuing to
populate the devices selectively.

To generalize the solution this patch populates the /firmware/ node
explicitly from of_platform_default_populate_init().

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Rob Herring <robh@kernel.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

Replace GPL license statements with SPDX GPL-2.0 license identifiers.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

* Add a jump target so that a specific error message is stored only once
  at the end of this function implementation.

* Replace two calls of the function "dev_err" by goto statements.

* Adjust two condition checks.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

In the case that shm->pages fails to allocate, the current exit
error path will try to put_page on a null shm->pages and cause
a null pointer dereference when accessing shm->pages[n]. Fix this
by only performing the put_page and kfree on shm->pages if it
is not null.

Detected by CoverityScan, CID#1463283 ("Dereference after null check")

Fixes: 033ddf12 ("tee: add register user memory")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

The function __tee_shm_alloc is local to the source and does
not need to be in global scope, so make it static.

Cleans up sparse warning:
symbol '__tee_shm_alloc' was not declared. Should it be static?
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

Checks the memory type of the pages to be registered as shared memory.
Only normal cached memory is allowed.
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

Adds a start argument to the shm_register callback to allow the callback
to check memory type of the passed pages.
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

i.MX6SX has a PCI power domain in PGC. Add support for it.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Acked-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

The optee driver includes the header files in an unusual order,
with asm/pgtable.h before the linux/*.h headers. For some reason
this seems to trigger a build failure:

drivers/tee/optee/call.c: In function 'optee_fill_pages_list':
include/asm-generic/memory_model.h:64:14: error: implicit declaration of function 'page_to_section'; did you mean '__nr_to_section'? [-Werror=implicit-function-declaration]
  int __sec = page_to_section(__pg);   \
drivers/tee/optee/call.c:494:15: note: in expansion of macro 'page_to_phys'
  optee_page = page_to_phys(*pages) +

Let's just include linux/mm.h, which will then get the other
header implicitly.

Fixes: 3bb48ba5 ("tee: optee: add page list manipulation functions")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Merge tag 'tegra-for-4.16-memory' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/tegra/linux into next/drivers

Pull "memory: tegra: Changes for v4.16-rc1" from Thierry Reding:

The Tegra memory controller driver will now instruct the SMMU driver to
create groups, which will make it easier for device drivers to share an
IOMMU domain between multiple devices.

Initial Tegra186 support is also added in a separate driver.

* tag 'tegra-for-4.16-memory' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  iommu/tegra-smmu: Fix return value check in tegra_smmu_group_get()
  iommu/tegra: Allow devices to be grouped
  memory: tegra: Create SMMU display groups
  memory: tegra: Add Tegra186 support
  dt-bindings: memory: Add Tegra186 support
  dt-bindings: misc: Add Tegra186 MISC registers bindings

Merge tag 'tee-drv-dynamic-shm-for-v4.16' of https://git.linaro.org/people/jens.wiklander/linux-tee into next/drivers

Pull "tee dynamic shm for v4.16" from Jens Wiklander:

This pull request enables dynamic shared memory support in the TEE
subsystem as a whole and in OP-TEE in particular.

Global Platform TEE specification [1] allows client applications
to register part of own memory as a shared buffer between
application and TEE. This allows fast zero-copy communication between
TEE and REE. But current implementation of TEE in Linux does not support
this feature.

Also, current implementation of OP-TEE transport uses fixed size
pre-shared buffer for all communications with OP-TEE OS. This is okay
in the most use cases. But this prevents use of OP-TEE in virtualized
environments, because:
 a) We can't share the same buffer between different virtual machines
 b) Physically contiguous memory as seen by VM can be non-contiguous
    in reality (and as seen by OP-TEE OS) due to second stage of
    MMU translation.
 c) Size of this pre-shared buffer is limited.

So, first part of this pull request adds generic register/unregister
interface to tee subsystem. The second part adds necessary features into
OP-TEE driver, so it can use not only static pre-shared buffer, but
whole RAM to communicate with OP-TEE OS.

This change is backwards compatible allowing older secure world or
user space to work with newer kernels and vice versa.

[1] https://www.globalplatform.org/specificationsdevice.asp

* tag 'tee-drv-dynamic-shm-for-v4.16' of https://git.linaro.org/people/jens.wiklander/linux-tee:
  tee: shm: inline tee_shm_get_id()
  tee: use reference counting for tee_context
  tee: optee: enable dynamic SHM support
  tee: optee: add optee-specific shared pool implementation
  tee: optee: store OP-TEE capabilities in private data
  tee: optee: add registered buffers handling into RPC calls
  tee: optee: add registered shared parameters handling
  tee: optee: add shared buffer registration functions
  tee: optee: add page list manipulation functions
  tee: optee: Update protocol definitions
  tee: shm: add page accessor functions
  tee: shm: add accessors for buffer size and page offset
  tee: add register user memory
  tee: flexible shared memory pool creation

We need to configure the interconnect target module based on the
device three configuration.

Let's also add a new quirk for SYSC_QUIRK_RESET_STATUS to indicate
that the SYSCONFIG reset bit changes after the reset is done.
Signed-off-by: Tony Lindgren <tony@atomide.com>

Let's configure few module quirks via device tree using the
properties for "ti,no-idle-on-init", "ti,no-reset-on-init"
and "ti,sysc-delay-us".

Let's also reorder the probe a bit so we have pdata available
earlier, and move the PM runtime calls to sysc_init_module()
from sysc_read_revision().
Signed-off-by: Tony Lindgren <tony@atomide.com>

We can easily detect i2c based on it's non-standard module registers that
consist of two 32-bit registers accessed in 16-bit mode.

So far we don't have other 16-bit modules, so there's currently no need
to add a custom property for 16-bit register access.
Signed-off-by: Tony Lindgren <tony@atomide.com>

Let's add data for the known interconnect target module types by mapping
their register bits.

Note that we can handle many quirks for the older omap2 type1 modules
directly in the driver without a need for adding custom properties.
Signed-off-by: Tony Lindgren <tony@atomide.com>

We want to be able to configure hwmod sysc data from ti-sysc driver using
platform data callbacks. So let's make struct omap_hwmod_sysc_fields into
struct sysc_data and have it available for both ti-sysc driver and hwmod
code.

Note that we can make it use s8 instead of u8 as the hwmod code uses the
feature flags to check for this field. However, for ti-sysc we can use
-ENODEV to indicate a feature is not supported in the hardware and can
simplify the code that way.

And let's add also emufree_shift as the dts files will be describing the
hardware for the SYSCONFIG register capbilities mask.

Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

We want to be able to eventually allocate these dynamically with the
data for omap_hwmod_class_sysconfig coming from dts.

Note that omap_hwmod_sysc_type_smartreflex is the same as the older
omap36xx_sr_sysc_fields, so let's use the earlier omap36xx_sr_sysc_fields
instead.
Signed-off-by: Tony Lindgren <tony@atomide.com>

Otherwise we cannot use generic OF_DEV_AUXDATA match without listing
all the compatibles separately for OF_DEV_AUXDATA. Let's also update the
binding accordingly.

Let's also fix omap4.dtsi to use "ti,sysc-omap4-sr" compatible as we
have documented in the binding. This was not noticed earlier as we're
still probing SmartReflex driver with platform data.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>

Pull "OMAP-GPMC: driver updates for v4.16" from Roger Quadros:

* Error out only if both 'bank-width' and 'gpmc,device-width' DT properties are missing.

* tag 'gpmc-omap-for-v4.16-immutable' of https://github.com/rogerq/linux:
  memory: omap-gpmc: Make 'bank-width' property optional

Merge tag 'tee-drv-async-supplicant-for-v4.16' of https://git.linaro.org/people/jens.wiklander/linux-tee into next/drivers

Pull "Enable async communication with tee supplicant" from Jens Wiklander:

This pull request enables asynchronous communication with TEE supplicant
by introducing meta parameters in the user space API. The meta
parameters can be used to tag requests with an id that can be matched
against an asynchronous response as is done here in the OP-TEE driver.

Asynchronous supplicant communication is needed by OP-TEE to implement
GlobalPlatforms TEE Sockets API Specification v1.0.1. The specification
is available at https://www.globalplatform.org/specificationsdevice.asp.

This change is backwards compatible allowing older supplicants to work
with newer kernels and vice versa.

* tag 'tee-drv-async-supplicant-for-v4.16' of https://git.linaro.org/people/jens.wiklander/linux-tee:
  optee: support asynchronous supplicant requests
  tee: add TEE_IOCTL_PARAM_ATTR_META
  tee: add tee_param_is_memref() for driver use

Being called during early_initcall() is early enough that it occurs
before SMP initialization, which is all we care about for the Bus
Interface Unit configuration.

This solves lack of BIU initialization on ARM64 platforms where we do
not have an anchor where to put the BIU initialization (since there are
no machine descriptors).
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

We may need access to family_id and product_id fairly early on boot for
other parts of the code (e.g: biuctrl.c), so split the initialization
between an early_init() and an arch_initcall() which allows us to do
that.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

In order to achieve expected MCP bus throughput on 3 particular chips:
7268, 7271 and 7278, do the appropriate programming of the MCP
interface: increase number of MCP write credits, turn on write-back
throttling when present.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

Add definitions for B53 systems register: CPU_MCP_FLOW_REG and
CPU_WRITEBACK_CTRL_REG. These register will be saved and restored
accordingly.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

In preparation for saving/restoring additional registers required on
some newer platforms (7268, 7271, 7278), migrate the code to use enums
and helper functions to access registers.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

On Broadcom Brahma-B53 CPUs, the CPU_CREDIT_REG offset got moved to
0x0b0 instead of 0x184, correct this such that we correcty
enable/disable write-pairing for these chips.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

In preparation for fixing and changing values in the CPU_CREDIT_REG
register for B53-based systems, make the offset parameterized.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>