Merge tag 'memory-controller-drv-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into arm/drivers

Memory controller drivers for v5.9

The drivers/memory directory with memory controller drivers, over the
last days grew in numbers but lacked any coordinated care.  The generic
part (device tree helpers) were pulled in through various trees,
depending on driver needs.

The patchset is a first try to improve code quality of memory controller
drivers.  Mostly these are non-intrusive fixes for GCC, checkpatch or
sparse warnings.  This also fixes missing SPDX tags or improves generic
code quality (whitespace, const correctness).

Last commit appoints also Krzysztof Kozlowski as a maintainer.

* tag 'memory-controller-drv-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux: (22 commits)
  MAINTAINERS: Add Krzysztof Kozlowski as maintainer of memory controllers
  memory: samsung: exynos-srom: Describe the Kconfig entry
  memory: Describe the MEMORY Kconfig entry
  memory: da8xx-ddrctl: Remove unused 'node' variable
  memory: fsl_ifc: Fix whitespace issues
  memory: pl172: Add GPLv2 SPDX license header
  memory: omap-gpmc: Fix whitespace issue
  memory: omap-gpmc: Include <linux/sizes.h> for SZ_16M
  memory: mtk-smi: Add argument to function pointer definition
  memory: brcmstb_dpfe: Remove unneeded braces
  memory: brcmstb_dpfe: Constify the contents of string
  memory: ti-emif-pm: Fix cast to iomem pointer
  memory: ti-aemif: Rename SS to SSTROBE to avoid name conflicts
  memory: emif: Silence platform_get_irq() error in driver
  memory: emif: Fix whitespace coding style violations
  memory: emif: Put constant in comparison on the right side
  memory: emif-asm-offsets: Add GPLv2 SPDX license header
  memory: of: Remove unneeded extern from function declarations
  memory: of: Correct indentation
  memory: of: Remove __func__ in device related messages
  ...

Link: https://lore.kernel.org/r/20200724160314.8543-1-krzk@kernel.orgSigned-off-by: Arnd Bergmann <arnd@arndb.de>

The generic parts of memory controllers (of_memory.[ch]) lacked any
care.  The memory controller drivers were not abandoned (usually
picked up by architecture maintainers) but in such case I can take care
about them as well.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>

Write short description about the Exynos SROM controller driver.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Write short description about the entire memory controllers section.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

The variable 'node' is not used.  Remove it to silence compile warning:

    drivers/memory/da8xx-ddrctl.c: In function 'da8xx_ddrctl_probe':
    drivers/memory/da8xx-ddrctl.c:105:22: warning: variable 'node' set but not used [-Wunused-but-set-variable]
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Fix minor whitespace and comment issues.  Do not break message strings.
No functional changes.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Add GPLv2 license header and remove GPL boiler plate text.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Fix minor whitespace and comment issues.  No functional changes.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

The driver uses SZ_16M which is defined in include/linux/sizes.h.  On
ARM it was pulled by other headers but its inclusion is necessary for
compile testing on other architectures.

This fixes build error when compile testing on i386 architecture:

    drivers/memory/omap-gpmc.c: In function ‘gpmc_cs_remap’:
    drivers/memory/omap-gpmc.c:961:12: error: ‘SZ_16M’ undeclared (first use in this function)
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Fix checkpatch warning:

    WARNING: function definition argument 'struct device *' should also have an identifier name
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Single statement blocks don't need braces.  Fixes checkpatch warning:

    WARNING: braces {} are not necessary for single statement blocks
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Markus Mayer <mmayer@broadcom.com>

The string itself can be made const for safety.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Markus Mayer <mmayer@broadcom.com>

Cast pointer to iomem memory properly to fix sparse warning:

    drivers/memory/ti-emif-pm.c:251:38: warning: incorrect type in argument 1 (different address spaces)
    drivers/memory/ti-emif-pm.c:251:38:    expected void const volatile [noderef] __iomem *addr
    drivers/memory/ti-emif-pm.c:251:38:    got void *
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

SS conflicts with compile test build on i386:

    drivers/memory/ti-aemif.c:40:0: warning: "SS" redefined
    In file included from arch/x86/include/uapi/asm/ptrace.h:6:0,
                     from arch/x86/include/asm/ptrace.h:7,
                     from arch/x86/include/asm/math_emu.h:5,
                     from arch/x86/include/asm/processor.h:13,
                     from include/linux/mutex.h:19,
                     from include/linux/notifier.h:14,
                     from include/linux/clk.h:14,
                     from drivers/memory/ti-aemif.c:12:
    arch/x86/include/uapi/asm/ptrace-abi.h:23:0: note: this is the location of the previous definition
     #define SS   16

Use more descriptive name (SSTROBE) to avoid the conflict.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

The platform_get_irq() already prints error message so there is no need
to do it again in the driver.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Make the code and printed messages slightly more readable.  Fixes
checkpatch warnings:

    WARNING: quoted string split across lines
    ERROR: space prohibited before that ',' (ctx:WxW)
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Fixes checkpatch warning:

    WARNING: Comparisons should place the constant on the right side of the test
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Add GPLv2 license header and remove GPL boiler plate text.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Function declarations in headers do not need to come with extern
keyword.  Remove them to make the declaration slightly shorter.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Correct indentation to match open parenthesis.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Messages printed by generic of_memory code will still be using device
context so their location/meaning will be known.  Printing __func__ is
not needed.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

The of_memory.c does not use platform_device nor linked list.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Merge tag 'mvebu-drivers-5.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/gclement/mvebu into arm/drivers

mvebu drivers for 5.9 (part 1)

For firmware on the Turris MOX (Armada 3720 based board), add support
ECDSA signatures via debugfs.

* tag 'mvebu-drivers-5.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/gclement/mvebu:
  firmware: turris-mox-rwtm: add debugfs documentation
  firmware: turris-mox-rwtm: support ECDSA signatures via debugfs
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Check for regmap_read() return code before using the read value in
following write in exynos5_switch_timing_regs().  Pass reading error
code to the callers.

This does not introduce proper error handling for such failed reads (and
obviously regmap_write() error is still ignored) because the driver
ignored this in all places.  Therefor it only fixes reported issue while
matching current driver coding style:

       drivers/memory/samsung/exynos5422-dmc.c: In function 'exynos5_switch_timing_regs':
    >> drivers/memory/samsung/exynos5422-dmc.c:216:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Merge tag 'qcom-drivers-for-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux into arm/drivers

Qualcomm driver updates for v5.9

For RPMh this fixes an issue where ktime was used during suspend, allows
the driver to be used on ARM targets and some minor cleanups.

It adds support for the latest format version in the socinfo driver and
adds identifiers for SM8250 and SDM630.

SMD-RPM gains compatibles for MSM8994 and MSM8936 and the Qualcomm SCM
gains compatibles MSM8994 and IPQ8074.

The GENI core code gains interconnect path voting and performance level
support, with subsequent patches integrating this with the SPI, I2C,
UART and QSPI drivers.

Following this the KGDB support for the GENI serial driver is improved,
the performance related to chip-select is improved for SPI and QSPI.

* tag 'qcom-drivers-for-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux: (35 commits)
  soc: qcom: geni: Fix NULL pointer dereference
  tty: serial: qcom-geni-serial: Drop the icc bw votes in suspend for console
  serial: qcom_geni_serial: Always use 4 bytes per TX FIFO word
  serial: qcom_geni_serial: Make kgdb work even if UART isn't console
  spi: spi-geni-qcom: Get rid of most overhead in prepare_message()
  spi: spi-geni-qcom: Set the clock properly at runtime resume
  spi: spi-geni-qcom: Avoid clock setting if not needed
  spi: spi-qcom-qspi: Set an autosuspend delay of 250 ms
  spi: spi-qcom-qspi: Avoid clock setting if not needed
  spi: spi-qcom-qspi: Use OPP API to set clk/perf state
  firmware: qcom_scm: Add msm8994 compatible
  firmware: qcom_scm: Fix legacy convention SCM accessors
  <linux/of.h>: add stub for of_get_next_parent() to fix qcom build error
  dt-bindings: firmware: qcom: Add compatible for IPQ8074 SoC
  spi: spi-geni-qcom: Use OPP API to set clk/perf state
  tty: serial: qcom_geni_serial: Use OPP API to set clk/perf state
  spi: spi-qcom-qspi: Add interconnect support
  spi: spi-geni-qcom: Add interconnect support
  spi: spi-geni-qcom: Combine the clock setting code
  tty: serial: qcom_geni_serial: Add interconnect support
  ...

Link: https://lore.kernel.org/r/20200721044812.3429652-1-bjorn.andersson@linaro.orgSigned-off-by: Arnd Bergmann <arnd@arndb.de>

Merge tag 'imx-drivers-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into arm/drivers

i.MX drivers change for 5.9:

- Update SCU irq code to call pm_system_wakeup() in general MU IRQ
  handler, so that system can be waked up when MU IRQ arrives.
- Move i.MX SCU soc driver into imx firmware folder to get it
  initialized from i.MX SCU firmware driver.
- Clean up soc-imx-scu driver a bit by using devm_kasprintf().
- Correct postfix setting for cm40 power domain in scu-pd driver.
- Add resource management support for IMX_SCU firmware driver.
- Add more cm4 resources to i.MX SCU power domain driver.
- Select ARM_GIC_V3 from SOC_IMX8M for being able to use GICv3 driver
  in AARCH32 mode Linux on AARCH64 hardware.

* tag 'imx-drivers-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  soc: imx: select ARM_GIC_V3 for i.MX8M
  firmware: imx: Move i.MX SCU soc driver into imx firmware folder
  firmware: imx: scu-pd: add more cm4 resources
  firmware: imx: add resource management api
  firmware: imx: scu-pd: fix cm40 power domain
  soc: imx: scu: use devm_kasprintf
  firmware: imx: make sure MU irq can wake up system from suspend mode

Link: https://lore.kernel.org/r/20200720085536.24138-1-shawnguo@kernel.orgSigned-off-by: Arnd Bergmann <arnd@arndb.de>

Reset controller updates for v5.9

This tag moves the reset-simple header out of drivers/reset for use by
drivers outside of drivers/reset, adds a .reset() callback to
reset-simple, converts i.MX reset bindings to json-schema, fixes a
compile warning in the reset-intel-gw driver, and replaces some HTTP
links with HTTPS ones in comments.

* tag 'reset-for-v5.9' of git://git.pengutronix.de/pza/linux:
  reset: Replace HTTP links with HTTPS ones
  reset: intel: fix a compile warning about REG_OFFSET redefined
  dt-bindings: reset: Convert i.MX7 reset to json-schema
  dt-bindings: reset: Convert i.MX reset to json-schema
  reset: simple: Add reset callback
  reset: Move reset-simple header out of drivers/reset

Link: https://lore.kernel.org/r/b718f052e38abbaac599d80645376b75e54aa5bd.camel@pengutronix.deSigned-off-by: Arnd Bergmann <arnd@arndb.de>

Add a simple custom voltage regulator coupler for Exynos5800 SoCs, which
require coupling between "vdd_arm" and "vdd_int" regulators. This coupler
ensures that the voltage values don't go below the bootloader-selected
operation point during the boot process until the clients set their
constraints. It is achieved by assuming minimal voltage value equal to
the current value if no constraints are set. This also ensures proper
voltage balancing if any of the client driver is missing.

The balancing code comes from the regulator/core.c with the additional
logic for handling regulators without client constraints applied added.

Link: https://lore.kernel.org/r/20200721180900.13844-5-krzk@kernel.orgSigned-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

pdev struct doesn't exits for the devices whose status are disabled
from DT node, in such cases NULL is returned from 'of_find_device_by_node'
Later when we try to get drvdata from pdev struct NULL pointer dereference
is triggered.

Add a NULL check for return values to fix the issue.

We were hitting this issue when one of QUP is disabled.
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Fixes: 048eb908 ("soc: qcom-geni-se: Add interconnect support to fix earlycon crash")
Reported-by: Sai Prakash Ranjan <saipraka@codeaurora.org>
Signed-off-by: Akash Asthana <akashast@codeaurora.org>
Link: https://lore.kernel.org/r/1594996342-26964-1-git-send-email-akashast@codeaurora.org
[bjorn: s/wrapper_pdev/pdev/]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.

Deterministic algorithm:
For each file:
  If not .svg:
    For each line:
      If doesn't contain `\bxmlns\b`:
        For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`:
	  If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`:
            If both the HTTP and HTTPS versions
            return 200 OK and serve the same content:
              Replace HTTP with HTTPS.
Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

kernel test robot reports a compile warning about REG_OFFSET redefined
in the reset-intel-gw.c after merging commit e44ab4e1 ("regmap:
Simplify implementation of the regmap_read_poll_timeout() macro"). the
warning is like that:

drivers/reset/reset-intel-gw.c:18:0: warning: "REG_OFFSET" redefined
 #define REG_OFFSET GENMASK(31, 16)

In file included from ./arch/arm/mach-ixp4xx/include/mach/hardware.h:30:0,
                 from ./arch/arm/mach-ixp4xx/include/mach/io.h:15,
                 from ./arch/arm/include/asm/io.h:198,
                 from ./include/linux/io.h:13,
                 from ./include/linux/iopoll.h:14,
                 from ./include/linux/regmap.h:20,
                 from drivers/reset/reset-intel-gw.c:12:
./arch/arm/mach-ixp4xx/include/mach/platform.h:25:0: note: this is the location of the previous definition
 #define REG_OFFSET 3
Reported-by: kernel test robot <lkp@intel.com>
Fixes: c9aef213 ("reset: intel: Add system reset controller driver")
Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

Add debugfs ABI documentation for the ECDSA signatures.
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

The firmware on Turris MOX secure processor offers signing messages
with ECDSA private key stored in protected OTP memory.

The optimal solution would be to register an akcipher provider via
kernel's crypto API, but crypto API does not yet support accessing
akcipher API from userspace (and probably won't for some time, see
https://www.spinics.net/lists/linux-crypto/msg38388.html).

At first I tried to put this via standard sysfs API, but the way I
designed it is not compatible with sysfs's standard "one file per
attribute".

This patch therefore adds support for accessing this signature
generation mechanism via debugfs. Since CZ.NIC's Turris MOX is the only
user of this module, the potential future change to akcipher API should
not cause problems, since we can just change our userspace software then.
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

Merge tag 'tegra-for-5.9-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/drivers

soc/tegra: Changes for v5.9-rc1

This adds missing SoC IDs for Tegra186 and Tegra194 and fixes a typo in
a warning message.

* tag 'tegra-for-5.9-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  soc/tegra: fuse: Fix typo in APB MISC warning
  soc/tegra: fuse: Add Tegra186 and Tegra194 SoC IDs

Link: https://lore.kernel.org/r/20200717161300.1661002-4-thierry.reding@gmail.comSigned-off-by: Arnd Bergmann <arnd@arndb.de>

Merge tag 'tegra-for-5.9-memory' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/drivers

memory: tegra: Changes for v5.9-rc1

This contains the Tegra210 EMC frequency scaling support that didn't
make it into v5.8. In addition there are a couple of cleanups and minor
fixes.

* tag 'tegra-for-5.9-memory' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  memory: tegra: Add Tegra132 compatible string match
  memory: tegra: Fix KCONFIG variables for Tegra186 and Tegra194
  memory: tegra: Delete some dead code
  memory: tegra: Avoid unused function warnings
  memory: tegra: Drop <linux/clk-provider.h>
  memory: tegra: Fix an error handling path in tegra186_emc_probe()
  memory: tegra30-emc: Poll EMC-CaR handshake instead of waiting for interrupt
  memory: tegra20-emc: Poll EMC-CaR handshake instead of waiting for interrupt
  memory: tegra: Support derated timings on Tegra210
  memory: tegra: Add EMC scaling sequence code for Tegra210
  memory: tegra: Add EMC scaling support code for Tegra210
  memory: tegra: Make debugfs permissions human-readable

Link: https://lore.kernel.org/r/20200717161300.1661002-3-thierry.reding@gmail.comSigned-off-by: Arnd Bergmann <arnd@arndb.de>

Merge tag 'tegra-for-5.9-firmware' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/drivers

firmware: tegra: Changes for v5.9-rc1

This has a few cleanups and the addition of a new mechanism to query
debug information from the BPMP.

* tag 'tegra-for-5.9-firmware' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  firmware: tegra: Update BPMP ABI
  firmware: tegra: Add support for in-band debug
  firmware: tegra: Prepare for supporting in-band debugfs
  firmware: tegra: Use consistent return variable name
  firmware: tegra: Add return code checks and increase debugfs size

Link: https://lore.kernel.org/r/20200717161300.1661002-2-thierry.reding@gmail.comSigned-off-by: Arnd Bergmann <arnd@arndb.de>

Kbuild test robot reports the following sparse warning:

drivers/firmware/arm_scmi/clock.c:142:21:
	sparse: Using plain integer as NULL pointer

Use NULL pointer instead of integer 0 for rate pointer and fix the
warning.

Link: https://lore.kernel.org/r/20200717140405.17905-1-sudeep.holla@arm.comReported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Merge tag 'renesas-drivers-for-v5.9-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel into arm/drivers

Renesas driver updates for v5.9

  - Add core support for the new RZ/G2H (R8A774E1) SoC, including System
    Controller (SYSC) and Reset (RST) support.

* tag 'renesas-drivers-for-v5.9-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel:
  soc: renesas: rcar-rst: Add support for RZ/G2H
  soc: renesas: Identify RZ/G2H
  soc: renesas: Add Renesas R8A774E1 config option
  soc: renesas: rcar-sysc: Add r8a774e1 support
  clk: renesas: Add r8a774e1 CPG Core Clock Definitions
  dt-bindings: power: Add r8a774e1 SYSC power domain definitions

Link: https://lore.kernel.org/r/20200717112427.26032-3-geert+renesas@glider.beSigned-off-by: Arnd Bergmann <arnd@arndb.de>

The hardware block is called APB MISC, not ABP MISC, so fix the warning
to use the correct name.
Signed-off-by: Thierry Reding <treding@nvidia.com>

SoC IDs for these generations had never been defined. Do so now.
Signed-off-by: Sandipan Patra <spatra@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>