Kernel moving to Linux v5.15

[Joel Stanley <joel@jms.id.au>]

The openbmc kernel will move to a v5.15 base. There are 73 patches in
the tree, not counting changes that will be merged in v5.16 which have
been backported.

 https://gerrit.openbmc-project.xyz/c/openbmc/openbmc/+/48487

I have rebased all patches from dev-5.14, but have not tested or
bumped Nuvoton as no one has done any development there since the last
rebase. I assume no one is using the OpenBMC tree for Nuvoton
machines. I plan to drop the Nuvoton patches we carry in the openbmc
tree when rebasing v5.16. They can be picked up again when an upstream
submission is made.

Below is a list of the out of tree patches.

Andrew Jeffery (10):
      dt-bindings: hwmon: pmbus: Add Maxim MAX31785 documentation
      pmbus (max31785): Add support for devicetree configuration
      pmbus (core): Use driver callbacks in pmbus_get_fan_rate()
      pmbus (core): One-shot retries for failure to set page
      pmbus (max31785): Wrap all I2C accessors in one-shot failure handlers
      ARM: dts: aspeed: witherspoon: Update max31785 node
      ipmi: kcs_bmc: Add a "raw" character device interface
      ARM: dts: tacoma: Clean up KCS nodes
      leds: pca955x: Make the gpiochip always expose all pins
      leds: pca955x: Allow zero LEDs to be specified

Brad Bishop (3):
      ipmi: aspeed-g6: Add compatible strings
      reset: simple: Add AST2600 compatibility string
      eeprom: at25: Split reads into chunks and cap write size

Cédric Le Goater (19):
      mtd: spi-nor: aspeed: use command mode for reads
      mtd: spi-nor: aspeed: add support for SPI dual IO read mode
      mtd: spi-nor: aspeed: link controller with the ahb clock
      mtd: spi-nor: aspeed: optimize read mode
      mtd: spi-nor: aspeed: limit the maximum SPI frequency
      mtd: spi-nor: aspeed: introduce a aspeed_smc_default_read() helper
      mtd: spi-nor: aspeed: clarify 4BYTE address mode mask
      mtd: spi-nor: aspeed: use memcpy_fromio() to capture the
optimization buffer
      mtd: spi-nor: aspeed: add support for the 4B opcodes
      mtd: spi-nor: Add support for w25q512jv
      mtd: spi-nor: aspeed: Introduce a field for the AHB physical address
      mtd: spi-nor: aspeed: Introduce segment operations
      mtd: spi-nor: aspeed: add initial support for ast2600
      mtd: spi-nor: aspeed: Check for disabled segments on the AST2600
      mtd: spi-nor: aspeed: Introduce training operations per platform
      mtd: spi-nor: aspeed: Introduce a HCLK mask for training
      mtd: spi-nor: aspeed: check upper freq limit when doing training
      mtd: spi-nor: aspeed: add support for AST2600 training
      /dev/mem: add a devmem kernel parameter to activate the device

Eddie James (8):
      soc: aspeed: Add XDMA Engine Driver
      soc: aspeed: xdma: Add user interface
      soc: aspeed: xdma: Add reset ioctl
      dt-bindings: input: Add documentation for IBM Operation Panel
      input: misc: Add IBM Operation Panel driver
      ARM: dts: aspeed: tacoma: Remove CFAM reset GPIO
      spi: fsi: Print status on error
      spi: fsi: Fix contention in the FSI2SPI engine

Fran Hsu (2):
      ARM: dts: nuvoton: npcm730: Add UDC device
      ARM: dts: nuvoton: gsj: Add non-mainline nodes

George Hung (4):
      dt-binding: edac: add NPCM ECC documentation
      edac: npcm: Add Nuvoton NPCM7xx EDAC driver
      ARM: dts: nuvoton: gbs: split SPI flash partition
      ARM: dts: nuvoton: gbs: Change the name of the partitions

Jae Hyun Yoo (1):
      clk: ast2600: enable BCLK for PCI/PCIe bus always

Joel Stanley (4):
      net: ftgmac100: Ensure tx descriptor updates are visible
      ARM: dts: ast2600evb: Enable EHCI controller
      ARM: configs: aspeed: Add openbmc kernel options
      ipmi: bt-bmc: Use registers directly

Tomer Maimon (21):
      dt-binding: bmc: Add NPCM7xx LPC BPC documentation
      misc: npcm7xx-lpc-bpc: add NPCM7xx BIOS post code driver
      dt-binding: bmc: add npcm7xx pci mailbox document
      misc: mbox: add npcm7xx pci mailbox driver
      dt-binding: net: document NPCM7xx EMC DT bindings
      net: npcm: add NPCM7xx Ethernet MAC controller
      ARM: dts: npcm7xx: Add out of tree nodes
      ARM: dts: olympus: Add non-mainline nodes
      ARM: dts: npcm750: Add fuse regmap support node
      ARM: dts: npcm7xx: Link fuse syscon to adc and wdt
      clk: npcm7xx: add read only flag to divider clocks
      iio: adc: Add calibration support to npcm ADC
      watchdog: npcm: Add DT restart priority and reset type support
      pinctrl: npcm7xx: Add HGPIO pin support to NPCM7xx pinctrl driver
      pinctrl: pinconf: add pin persist configuration
      pinctrl: npcm7xx: Add pin persist configuration support
      spi: npcm-pspi: Add full duplex support
      dt-binding: bmc: add NPCM7XX JTAG master documentation
      misc: Add NPCM7xx JTAG master driver
      watchdog: npcm: Modify get reset status function
      ARM: configs: add defconfig for Nuvoton NPCM7xx BMC

William A. Kennington III (1):
      net: npcm: Support for fixed PHYs