In order to allow external control via SPI, memory-mapped areas must be
changed to use the generic regmap interface. This is step 1, and is
followed by an implementation that allows a custom regmap.
Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
Link: https://lore.kernel.org/r/20211119195928.2498441-4-colin.foster@in-advantage.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

struct gpio_chip recommends passing -1 as base to gpiolib. Doing so avoids
conflicts when the chip is external and gpiochip0 already exists.
Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
Tested-by: Clément Léger <clement.leger@bootlin.com>
Link: https://lore.kernel.org/r/20211119195928.2498441-3-colin.foster@in-advantage.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

Simple cleanup to make two function calls only one.
Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
Link: https://lore.kernel.org/r/20211119195928.2498441-2-colin.foster@in-advantage.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

In arch/arm/boot/dts/uniphier-pinctrl.dtsi, there are child nodes of
pinctrl that defines pinmux and pincfg, however, there are no rules about
that in dt-bindings.

'make dtbs_check' results an error with the following message:

   pinctrl: 'ain1', 'ain2', 'ainiec1', 'aout', 'aout1', 'aout2', ...
   ... 'usb2', 'usb3' do not match any of the regexes: 'pinctrl-[0-9]+'

To avoid the issue, add the rules of pinmux and pincfg in each child node
and grandchild node.
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1636416699-21033-1-git-send-email-hayashi.kunihiko@socionext.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

Add compatible strings for pm2250 SPMI GPIO to documentation.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Link: https://lore.kernel.org/r/1637076915-3280-2-git-send-email-loic.poulain@linaro.orgSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

PM2250, commonly combined with QCM2290, provides ten SPMI GPIOs.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Link: https://lore.kernel.org/r/1637076915-3280-1-git-send-email-loic.poulain@linaro.orgSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

sc7280 supports the egpio feature, GPIOs ranging from 144 to 174
(31 GPIOs) support it, we define gpio_func to 9, which
is an unused function for all these pins on sc7280.
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1637041084-3299-2-git-send-email-rnayak@codeaurora.orgSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

egpio is a scheme which allows special power Island Domain IOs
(LPASS,SSC) to be reused as regular chip GPIOs by muxing regular
TLMM functions with Island Domain functions.
With this scheme, an IO can be controlled both by the cpu running
linux and the Island processor. This provides great flexibility to
re-purpose the Island IOs for regular TLMM usecases.

2 new bits are added to ctl_reg, egpio_present is a read only bit
which shows if egpio feature is available or not on a given gpio.
egpio_enable is the read/write bit and only effective if egpio_present
is 1. Once its set, the Island IO is controlled from Chip TLMM.
egpio_enable when set to 0 means the GPIO is used as Island Domain IO.

To support this we add a new function 'egpio' which can be used to
set the egpio_enable to 0, for any other TLMM controlled functions
we set the egpio_enable to 1.
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Link: https://lore.kernel.org/r/1637041084-3299-1-git-send-email-rnayak@codeaurora.orgSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

PM8019 provides 6 GPIOs. Add a compatible to support that.
Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211112115342.17100-2-konrad.dybcio@somainline.orgSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

Add pmic-gpio compatible string for pm8019 pmic.
Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211112115342.17100-1-konrad.dybcio@somainline.orgSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

Add initial Qualcomm SDX65 pinctrl driver to support pin configuration
with pinctrl framework for SDX65 SoC.
Signed-off-by: Vamsi Krishna Lanka <quic_vamslank@quicinc.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/13acb3cb36349487dee9745ab040d8f1344d2096.1637048107.git.quic_vamslank@quicinc.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

Add device tree binding Documentation details for Qualcomm SDX65
pinctrl driver.
Signed-off-by: Vamsi Krishna Lanka <quic_vamslank@quicinc.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/06234768890dc7572226f23d432e5a69a4d5b305.1637048107.git.quic_vamslank@quicinc.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

This patch extends pinctrl-ocelot driver to support also the
lan966x. Register layout is same as ocelot. It has 78 GPIOs.
Requires 3 registers ALT0, ALT1, ALT2 to configure ALT mode.
Signed-off-by: Kavyasree Kotagiri <kavyasree.kotagiri@microchip.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20211118112548.14582-3-kavyasree.kotagiri@microchip.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

Add documentation for the compatible designated for lan966x.
Signed-off-by: Kavyasree Kotagiri <kavyasree.kotagiri@microchip.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20211118112548.14582-2-kavyasree.kotagiri@microchip.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

Merge tag 'intel-pinctrl-v5.17-2' of gitolite.kernel.org:pub/scm/linux/kernel/git/pinctrl/intel into devel

intel-pinctrl for v5.17-2

* Introduce new generic kasprintf_strarray() API
* Clean up and convert existing drivers to use the above

The API will be needed in the future for new comers, including Intel ones.

The following is an automated git shortlog grouped by driver:

armada-37xx:
 -  Switch to use devm_kasprintf_strarray()
 -  Convert to use dev_err_probe()
 -  Make use of the devm_platform_ioremap_resource()
 -  Use temporary variable for struct device
 -  Fix function name in the kernel doc

gpio:
 -  mockup: Switch to use kasprintf_strarray()

lib/string_helpers:
 -  Introduce managed variant of kasprintf_strarray()
 -  Introduce kasprintf_strarray()

pinctrl/rockchip:
 -  Switch to use devm_kasprintf_strarray()
 -  Convert to use dev_err_probe()
 -  Make use of the devm_platform_get_and_ioremap_resource()
 -  Use temporary variable for struct device
 -  Drop wrong kernel doc annotation

st:
 -  Switch to use devm_kasprintf_strarray()
 -  Convert to use dev_err_probe()
 -  Make use of the devm_platform_ioremap_resource_byname()
 -  Use temporary variable for struct device
 -  Drop wrong kernel doc annotations

zynqmp:
 -  Unify pin naming

Since we have a generic helper, switch the module to use it.
No functional change intended.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Bartosz Golaszewski <brgl@bgdev.pl>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Since we have devm_kasprintf_strarray() helper, which is used in
the rest of pin control drivers, it makes sense to switch this
driver to it. The pin names are not part of any ABI and hence
there will be no regression based on that. Otherwise all generated
pin names will follow the same schema in the pin control subsystem.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Since we have a generic helper, switch the module to use it.

As a side effect, add check for the memory allocation failures and
cleanup it either in error case or when driver is unloading.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

It's fine to call dev_err_probe() in ->probe() when error code is known.
Convert the driver to use dev_err_probe().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Use the devm_platform_ioremap_resource_byname() helper instead of
calling platform_get_resource_byname() and devm_ioremap_resource()
separately.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

Use temporary variable for struct device to make code neater.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Kernel doc validator is not happy:

  .../pinctrl-st.c:59: warning: This comment starts with '/**', but isn't a kernel-doc comment.
  .../pinctrl-st.c:73: warning: This comment starts with '/**', but isn't a kernel-doc comment.

Drop them as they are indeed not a kernel doc comments.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

Since we have a generic helper, switch the module to use it.

As a side effect, add check for the memory allocation failures and
cleanup it either in error case or when driver is unloading.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Gregory CLEMENT <gregory.clement@bootlin.com>

It's fine to call dev_err_probe() in ->probe() when error code is known.
Convert the driver to use dev_err_probe().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Gregory CLEMENT <gregory.clement@bootlin.com>

Use the devm_platform_ioremap_resource() helper instead of
calling of_address_to_resource() and devm_ioremap_resource()
separately.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Gregory CLEMENT <gregory.clement@bootlin.com>

Use temporary variable for struct device to make code neater.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Gregory CLEMENT <gregory.clement@bootlin.com>

Kernel doc validator is not happy:

  .../pinctrl-armada-37xx.c:926: warning: expecting prototype for armada_37xx_fill_funcs(). Prototype was for armada_37xx_fill_func() instead

Fix this by updating function name in the kernel doc.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Gregory CLEMENT <gregory.clement@bootlin.com>

Since we have a generic helper, switch the module to use it.

As a side effect, add check for the memory allocation failures and
cleanup it either in error case or when driver is unloading.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>

It's fine to call dev_err_probe() in ->probe() when error code is known.
Convert the driver to use dev_err_probe().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>

Use the devm_platform_get_and_ioremap_resource() helper instead of
calling platform_get_resource() and devm_ioremap_resource()
separately.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>

Use temporary variable for struct device to make code neater.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>

Kernel doc validator is not happy:

  .../pinctrl-rockchip.c:45: warning: This comment starts with '/**', but isn't a kernel-doc comment.

Drop it as it's indeed not a kernel doc comment.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>

Some of the users want to have easy way to allocate array of strings
that will be automatically cleaned when associated device is gone.

Introduce managed variant of kasprintf_strarray() for such use cases.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

We have a few users already that basically want to have array of
sequential strings to be allocated and filled.

Provide a helper for them (basically adjusted version from gpio-mockup.c).
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Add Kconfig support for -Wimplicit-fallthrough for both GCC and Clang.

The compiler option is under configuration CC_IMPLICIT_FALLTHROUGH,
which is enabled by default.

Special thanks to Nathan Chancellor who fixed the Clang bug[1][2]. This
bugfix only appears in Clang 14.0.0, so older versions still contain
the bug and -Wimplicit-fallthrough won't be enabled for them, for now.

This concludes a long journey and now we are finally getting rid
of the unintentional fallthrough bug-class in the kernel, entirely. :)

Link: https://github.com/llvm/llvm-project/commit/9ed4a94d6451046a51ef393cd62f00710820a7e8 [1]
Link: https://bugs.llvm.org/show_bug.cgi?id=51094 [2]
Link: https://github.com/KSPP/linux/issues/115
Link: https://github.com/ClangBuiltLinux/linux/issues/236Co-developed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Co-developed-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull xfs cleanups from Darrick Wong:
 "The most 'exciting' aspect of this branch is that the xfsprogs
  maintainer and I have worked through the last of the code
  discrepancies between kernel and userspace libxfs such that there are
  no code differences between the two except for #includes.

  IOWs, diff suffices to demonstrate that the userspace tools behave the
  same as the kernel, and kernel-only bits are clearly marked in the
  /kernel/ source code instead of just the userspace source.

  Summary:

   - Clean up open-coded swap() calls.

   - A little bit of #ifdef golf to complete the reunification of the
     kernel and userspace libxfs source code"

* tag 'xfs-5.16-merge-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: sync xfs_btree_split macros with userspace libxfs
  xfs: #ifdef out perag code for userspace
  xfs: use swap() to make dabtree code cleaner

Pull more parisc fixes from Helge Deller:
 "Fix a build error in stracktrace.c, fix resolving of addresses to
  function names in backtraces, fix single-stepping in assembly code and
  flush userspace pte's when using set_pte_at()"

* tag 'for-5.16/parisc-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc/entry: fix trace test in syscall exit path
  parisc: Flush kernel data mapping in set_pte_at() when installing pte for user page
  parisc: Fix implicit declaration of function '__kernel_text_address'
  parisc: Fix backtrace to always include init funtion names

Pull arch/sh updates from Rich Felker.

* tag 'sh-for-5.16' of git://git.libc.org/linux-sh:
  sh: pgtable-3level: Fix cast to pointer from integer of different size
  sh: fix READ/WRITE redefinition warnings
  sh: define __BIG_ENDIAN for math-emu
  sh: math-emu: drop unused functions
  sh: fix kconfig unmet dependency warning for FRAME_POINTER
  sh: Cleanup about SPARSE_IRQ
  sh: kdump: add some attribute to function
  maple: fix wrong return value of maple_bus_init().
  sh: boot: avoid unneeded rebuilds under arch/sh/boot/compressed/
  sh: boot: add intermediate vmlinux.bin* to targets instead of extra-y
  sh: boards: Fix the cacography in irq.c
  sh: check return code of request_irq
  sh: fix trivial misannotations

Pull ARM fixes from Russell King:

 - Fix early_iounmap

 - Drop cc-option fallbacks for architecture selection

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 9156/1: drop cc-option fallbacks for architecture selection
  ARM: 9155/1: fix early early_iounmap()