Pull GPIO updates from Linus Walleij:
 "This is the bulk of GPIO changes for the v4.21 kernel series.

  Core changes:

   - Some core changes are already in outside of this pull request as
     they came through the regulator tree, most notably
     devm_gpiod_unhinge() that removes devres refcount management from a
     GPIO descriptor. This is needed in subsystems such as regulators
     where the regulator core need to take over the reference counting
     and lifecycle management for a GPIO descriptor.

   - We dropped devm_gpiochip_remove() and devm_gpio_chip_match() as
     nothing needs it. We can bring it back if need be.

   - Add a global TODO so people see where we are going. This helps
     setting the direction now that we are two GPIO maintainers.

   - Handle the MMC CD/WP properties in the device tree core. (The bulk
     of patches activating this code is already merged through the
     MMC/SD tree.)

   - Augment gpiochip_request_own_desc() to pass a flag so we as
     gpiochips can request lines as active low or open drain etc even
     from ourselves.

  New drivers:

   - New driver for Cadence GPIO blocks.

   - New driver for Atmel SAMA5D2 PIOBU GPIO lines.

  Driver improvements:

   - A major refactoring of the PCA953x driver - this driver has been
     around for ages, and is now modernized to reduce code duplication
     that has stacked up and is using regmap to read write and cache
     registers.

   - Intel drivers are now maintained in a separate tree and start with
     a round of cleanups and unifications"

* tag 'gpio-v4.21-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (99 commits)
  gpio: sama5d2-piobu: Depend on OF_GPIO
  gpio: Add Cadence GPIO driver
  dt-bindings: gpio: Add bindings for Cadence GPIO
  gpiolib-acpi: remove unused variable 'err', cleans up build warning
  gpio: mxs: read pin level directly instead of using .get
  gpio: aspeed: remove duplicated statement
  gpio: add driver for SAMA5D2 PIOBU pins
  dt-bindings: arm: atmel: describe SECUMOD usage as a GPIO controller
  gpio/mmc/of: Respect polarity in the device tree
  dt-bindings: gpio: rcar: Add r8a774c0 (RZ/G2E) support
  memory: omap-gpmc: Get the header of the enum
  ARM: omap1: Fix new user of gpiochip_request_own_desc()
  gpio: pca953x: Add regmap dependency for PCA953x driver
  gpio: raspberrypi-exp: decrease refcount on firmware dt node
  gpiolib: Fix return value of gpio_to_desc() stub if !GPIOLIB
  gpio: pca953x: Restore registers after suspend/resume cycle
  gpio: pca953x: Zap single use of pca953x_read_single()
  gpio: pca953x: Zap ad-hoc reg_output cache
  gpio: pca953x: Zap ad-hoc reg_direction cache
  gpio: pca953x: Perform basic regmap conversion
  ...

Pull MMC updates from Ulf Hansson:
 "This time, this pull request contains changes crossing subsystems and
  archs/platforms, which is mainly because of a bigger modernization of
  moving from legacy GPIO to GPIO descriptors for MMC (by Linus
  Walleij).

  Additionally, once again, I am funneling changes to
  drivers/misc/cardreader/* and drivers/memstick/* through my MMC tree,
  mostly due to that we lack a maintainer for these.

  Summary:

  MMC core:
   - Cleanup BKOPS support
   - Introduce MMC_CAP_SYNC_RUNTIME_PM
   - slot-gpio: Delete legacy slot GPIO handling

  MMC host:
   - alcor: Add new mmc host driver for Alcor Micro PCI based cardreader
   - bcm2835: Several improvements to better recover from errors
   - jz4740: Rework and fixup pre|post_req support
   - mediatek: Add support for SDIO IRQs
   - meson-gx: Improve clock phase management
   - meson-gx: Stop descriptor on errors
   - mmci: Complete the sbc error path by sending a stop command
   - renesas_sdhi/tmio: Fixup reset/resume operations
   - renesas_sdhi: Add support for r8a774c0 and R7S9210
   - renesas_sdhi: Whitelist R8A77990 SDHI
   - renesas_sdhi: Fixup eMMC HS400 compatibility issues for H3 and M3-W
   - rtsx_usb_sdmmc: Re-work card detection/removal support
   - rtsx_usb_sdmmc: Re-work runtime PM support
   - sdhci: Fix timeout loops for some variant drivers
   - sdhci: Improve support for error handling due to failing commands
   - sdhci-acpi/pci: Disable LED control for Intel BYT-based controllers
   - sdhci_am654: Add new SDHCI variant driver to support TI's AM654 SOCs
   - sdhci-of-esdhc: Add support for eMMC HS400 mode
   - sdhci-omap: Fixup reset support
   - sdhci-omap: Workaround errata regarding SDR104/HS200 tuning failures
   - sdhci-msm: Fixup sporadic write transfers issues for SDR104/HS200
   - sdhci-msm: Fixup dynamical clock gating issues
   - various: Complete converting all hosts into using slot GPIO descriptors

  Other:
   - Move GPIO mmc platform data for mips/sh/arm to GPIO descriptors
   - Add new Alcor Micro cardreader PCI driver
   - Support runtime power management for memstick rtsx_usb_ms driver
   - Use USB remote wakeups for card detection for rtsx_usb misc driver"

* tag 'mmc-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: (99 commits)
  mmc: mediatek: Add MMC_CAP_SDIO_IRQ support
  mmc: renesas_sdhi_internal_dmac: Whitelist r8a774c0
  dt-bindings: mmc: renesas_sdhi: Add r8a774c0 support
  mmc: core: Cleanup BKOPS support
  mmc: core: Drop redundant check in mmc_send_hpi_cmd()
  mmc: sdhci-omap: Workaround errata regarding SDR104/HS200 tuning failures (i929)
  dt-bindings: sdhci-omap: Add note for cpu_thermal
  mmc: sdhci-acpi: Disable LED control for Intel BYT-based controllers
  mmc: sdhci-pci: Disable LED control for Intel BYT-based controllers
  mmc: sdhci: Add quirk to disable LED control
  mmc: mmci: add variant property to set command stop bit
  misc: alcor_pci: fix spelling mistake "invailid" -> "invalid"
  mmc: meson-gx: add signal resampling
  mmc: meson-gx: align default phase on soc vendor tree
  mmc: meson-gx: remove useless lock
  mmc: meson-gx: make sure the descriptor is stopped on errors
  mmc: sdhci_am654: Add Initial Support for AM654 SDHCI driver
  dt-bindings: mmc: sdhci-of-arasan: Add deprecated message for AM65
  dt-bindings: mmc: sdhci-am654: Document bindings for the host controllers on TI's AM654 SOCs
  mmc: sdhci-msm: avoid unused function warning
  ...

Pull regmap updates from Mark Brown:
 "This has been a busy release for the regmap-irq code, there's several
  new features been added, including an API cleanup for how we specify
  types that affected one existing driver (gpio-max77620):

   - Support for hardware that flags rising and falling edges on
     separate status bits from Bartosz Golaszewski.

   - Support for explicitly clearing interrupts before unmasking from
     Bartosz Golaszewski.

   - Support for level triggered IRQs from Matti Vaittinen"

* tag 'regmap-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: irq: add an option to clear status registers on unmask
  regmap: regmap-irq/gpio-max77620: add level-irq support
  regmap: regmap-irq: Remove default irq type setting from core
  regmap: debugfs: convert to DEFINE_SHOW_ATTRIBUTE
  regmap: rbtree: convert to DEFINE_SHOW_ATTRIBUTE
  regmap: irq: handle HW using separate rising/falling edge interrupts
  regmap: add a new macro:REGMAP_IRQ_REG_LINE(_id, _reg_bits)

Pull regulator updates from Mark Brown:
 "This has been a very busy release for the core, some fixes, one large
  new feature and a big bit of refactoring to update the GPIO API:

   - Support for coupled regulators from Dmitry Osipenko based on a
     prior attempt by Maciej Purski, allowing us to handle situations
     where the voltages on two regulators can't be too far apart from
     each other.

   - Conversion of the GPIO support in both drivers and the core to use
     GPIO descriptors rather than numbers, part of the overall project
     to remove GPIO numbers.

   - Support for standby mode suspend states from Andrei Stefanescu.

   - New drivers for Allwinner AXP209, Cirrus Logic Lochnagar and
     Microchip MPC16502"

* tag 'regulator-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: (90 commits)
  regulator: tps65910: fix a missing check of return value
  regulator: mcp16502: Select REGMAP_I2C to fix build error
  regulator: convert to DEFINE_SHOW_ATTRIBUTE
  regulator: mcp16502: Fix missing n_voltages setting
  regulator: mcp16502: Use #ifdef CONFIG_PM_SLEEP around mcp16502_suspend/resume_noirq
  regulator: mcp16502: code cleanup
  regulator: act8945a-regulator: make symbol act8945a_pm static
  drivers/regulator: fix a missing check of return value
  regulator: act8945a-regulator: fix 'defined but not used' compiler warning
  regulator: axp20x: fix set_ramp_delay for AXP209/dcdc2
  regulator: mcp16502: add support for suspend
  mfd: axp20x: use explicit bit defines
  mfd: axp20x: Clean up included headers
  regulator: dts: enable soft-start and ramp delay for the OLinuXino Lime2
  dt-bindings: mfd: axp20x: Add software based soft_start for AXP209 LDO3
  regulator: axp20x: add software based soft_start for AXP209 LDO3
  dt-bindings: mfd: axp20x: add support for regulator-ramp-delay for AXP209
  regulator: axp20x: add support for set_ramp_delay for AXP209
  mfd: axp20x: name voltage ramping define properly
  regulator: mcp16502: add regulator driver for MCP16502
  ...

This driver clearly needs OF_GPIO so depend on it.
Fixes a build error.

Cc: Andrei Stefanescu <Andrei.Stefanescu@microchip.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Pull GPIO fixes from Linus Walleij:
 "Hopefully last round of GPIO fixes.

  The ACPI patch is pretty important for some laptop users, the rest is
  driver-specific for embedded (mostly ARM) systems.

  I took out one ACPI patch that wasn't critical enough because I
  couldn't justify sending it at this point, and that is why the commit
  date is today, but the patches have been in linux-next.

  Sorry for not sending some of them earlier :(

  Notice that we have a co-maintainer for GPIO now, Bartosz Golaszewski,
  and he might jump in and make some pull requests at times when I am
  off.

  Summary:

   - ACPI IRQ request deferral

   - OMAP: revert deferred wakeup quirk

   - MAX7301: fix DMA safe memory handling

   - MVEBU: selective probe failure on missing clk"

* tag 'gpio-v4.20-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: mvebu: only fail on missing clk if pwm is actually to be used
  gpio: max7301: fix driver for use with CONFIG_VMAP_STACK
  gpio: gpio-omap: Revert deferred wakeup quirk handling for regressions
  gpiolib-acpi: Only defer request_irq for GpioInt ACPI event handlers

This patch adds a driver for Cadence GPIO controller.

It can be enabled with GPIO_CADENCE Kconfig option.
It uses generic GPIO infrastructure and works
as an interrupt controller.
At the moment it only supports level sensitive irqs.

Signed-off-by: Jan Kotas <jank@cadence.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Variable err is defined but never used. Remove it. Cleans up warning:

warning: unused variable ‘err’ [-Wunused-variable]

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Calling readl directly instead of going through another function that
results in the same result to remove some overhead. I didn't try to
measure the performance gain, but IMHO there is little benefit from
abstracting a GPIO register access in the GPIO driver.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Remove duplicated assignment statement from aspeed_gpio_probe() function.

Signed-off-by: Tao Ren <taoren@fb.com>
Acked-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>