[PATCH 0/7] Add dts for Rpi4 + Cirrus Lochnagar and codecs

[Richard Fitzgerald <rf@opensource.cirrus.com>]

This set of patches provides support for using the Cirrus Logic
Lochnagar audio development platform plus Cirrus Logic Madera/Arizona
codecs with the simple-card machine driver and a Raspberry Pi4. The
ultimate aim is to provide the dts file but some updates are needed to
the simple-card machine driver.

Patches are needed to simple-card to enable support for setting the
component sysclks and plls. The codec sysclks and plls cannot be
placed under the clock framwork because they are I2C/SPI-connected
peripherals and access to the registers would cause a nested get
of the I2C/SPI bus clock. The clock framework does not support this
and it would result in a deadlock.

Richard Fitzgerald (7):
  of: base: Add of_count_phandle_with_fixed_args()
  ASoC: simple-card: Add plls and sysclks DT schema
  ASoC: simple-card: Support setting component plls and sysclks
  ASoC: arizona: Allow codecs to be selected from kernel config
  ASoC: madera: Allow codecs to be selected from kernel config
  ARM: dts: Add dts for Raspberry Pi 4 + Cirrus Logic Lochnagar2
  MAINTAINERS: Add dts for Cirrus Logic Lochnagar on RPi4

 .../bindings/sound/simple-card.yaml           |   56 +
 MAINTAINERS                                   |    1 +
 arch/arm/boot/dts/Makefile                    |    1 +
 .../dts/bcm2711-rpi4b-cirrus-lochnagar.dts    | 1296 +++++++++++++++++
 drivers/of/base.c                             |   42 +
 include/linux/of.h                            |    9 +
 include/sound/simple_card_utils.h             |   24 +
 sound/soc/codecs/Kconfig                      |   18 +-
 sound/soc/generic/simple-card-utils.c         |  184 +++
 sound/soc/generic/simple-card.c               |   14 +-
 10 files changed, 1635 insertions(+), 10 deletions(-)
 create mode 100644 arch/arm/boot/dts/bcm2711-rpi4b-cirrus-lochnagar.dts

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2.20.1