Add a devicetree overlay to support the official Raspberry Pi 7inch touchscreen.

This also demuxes the i2c0 controller to support both pinctrls.

Changes in v2:
 * The device tree in now an overlay
 * The i2c demux patch is kept for now to have a working patch set. It has
   not been merged yet in [1].
 * The device tree overlay doesn't use fragments. It is working as is 
   but not enough literature was found to go one way or the other.

[1] https://www.spinics.net/lists/arm-kernel/msg944330.html

Detlev Casanova (3):
  ARM: dts: bcm2*: Demux i2c0 with a pinctrl
  of: Add support for -@ when compiling overlays
  ARM: dto: Add bcm2711-rpi-7-inches-ts.dts overlay

 arch/arm/boot/dts/Makefile                    |   4 +
 arch/arm/boot/dts/bcm2711-rpi-4-b.dts         |   1 +
 arch/arm/boot/dts/bcm2711.dtsi                |   2 +-
 arch/arm/boot/dts/bcm2835-rpi.dtsi            |   9 +-
 .../boot/dts/bcm283x-rpi-i2c0mux_0_44.dtsi    |   4 +
 arch/arm/boot/dts/bcm283x.dtsi                |  26 +++-
 arch/arm/boot/dts/overlays/Makefile           |   3 +
 .../dts/overlays/bcm2711-rpi-7-inches-ts.dts  | 125 ++++++++++++++++++
 arch/arm64/boot/dts/broadcom/Makefile         |   4 +
 .../arm64/boot/dts/broadcom/overlays/Makefile |   3 +
 .../overlays/bcm2711-rpi-7-inches-ts.dts      |   2 +
 drivers/of/Kconfig                            |   8 ++
 scripts/Makefile.lib                          |   9 +-
 13 files changed, 193 insertions(+), 7 deletions(-)
 create mode 100644 arch/arm/boot/dts/bcm283x-rpi-i2c0mux_0_44.dtsi
 create mode 100644 arch/arm/boot/dts/overlays/Makefile
 create mode 100644 arch/arm/boot/dts/overlays/bcm2711-rpi-7-inches-ts.dts
 create mode 100644 arch/arm64/boot/dts/broadcom/overlays/Makefile
 create mode 100644 arch/arm64/boot/dts/broadcom/overlays/bcm2711-rpi-7-inches-ts.dts

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2.36.0