Subject: Re: [PATCH V4 00/10] ARM: Add minimal Raspberry Pi 4 support

From: Matthias Brugger <[email-masked]>
Date: Mon, 7 Oct 2019 12:07:56 +0200

On 06/10/2019 17:28, Stefan Wahren wrote:
> This series adds minimal support for the new Raspberry Pi 4, so we are able
> to login via debug UART.
> 
> Patch 1:     Bluetooth driver fix
> Patch 2-3:   Fix some DT schema warnings
> Patch 4-5:   Prepare DTS for the new SoC BMC2711
> Patch 6-9:   Add Raspberry Pi 4 DTS support
> Patch 10:    Update MAINTAINERS
> 
> Unfortunately the Raspberry Pi Foundation didn't released a
> peripheral documentation for the new SoC yet. So we only have a preliminary
> datasheet [1] and reduced schematics [2].
> 
> Known issues:
> Since Linux 5.3-rc1 DMA doesn't work properly on that platform.
> Nicolas Saenz Julienne investigates on that issue. As a temporary workaround
> i reverted the following patch to test this series:
> 
> 79a98672 "dma-mapping: remove dma_max_pfn"
> 7559d612 "mmc: core: let the dma map ops handle bouncing"
> 

Just for reference, the patches from Nicolas are queued for v5.5 inclusion, so
it is a better basis to test using his series:
https://patchwork.kernel.org/cover/11141719/

Regards,
Matthias

> Changes in V4:
> - add Rob's Reviewed-by
> - enable ZONE_DMA for ARCH_BCM2835
> - fix spi reference in bcm2711.dtsi
> - fix bluetooth section in RPi 4 dts
> - drop "always-on" for armv8-timer
> - add necessary Bluetooth driver fix
> - add arm64 dts link
> - additional comments to the dts files as requested by Florian
> 
> Changes in V3:
> - rebased series
> - add Reviewed-by
> - enable ARM_GIC for ARCH_BCM2835 on arm64 too
> - configure i2c pull-up in bcm2711.dtsi
> - move i2c2 to bcm2835-common.dtsi
> - add missing compatibles to DT schema as suggested by Rob
> - fix DT schema warnings in dtsi files
> - replace brcm pintrl with generic pinctrl as suggested by Linus
> - make dma_zone_size depend on CONFIG_ZONE_DMA as suggested by Matthias
> 
> Changes in V2:
> - use separate board file for BCM2711
> - enable ARM_GIC for ARCH_BCM2835
> - add Acked-by and Reviewed-by
> - fix arm-pmu and timer nodes for BCM2711 reported by Marc Zyngier
> - enable HDMI at board level
> - move HDMI and pixelvalve into bcm2835-common.dtsi as suggested by Eric Anholt
> - fix DWC2 probing warning by setting USB role to peripheral
> - fix order of node references in bcm2711.dtsi
> - disable I2C clock stretching quirk for BCM2711
> - mark PLLD_PER as critical clock
> - make PLLH clock unavailable on BCM2711
> - fix compile warning in clk-bcm2835 for arm64
> 
> Changes since RFC:
> - change BCM2838 -> BCM2711 as discussed in RFC
> - update MAINTAINERS accordingly
> - drop "spi: bcm2835: enable shared interrupt support" from series
> - squash all pinctrl-bcm2835 changes into one patch
> - introduce SoC specific clock registration as suggested by Florian
> - fix watchdog probing for Raspberry Pi 4
> - convert brcm,bcm2835.txt to json-schema
> - move VC4 node to bcm2835-common.dtsi
> - fallback to legacy pull config for Raspberry Pi 4
> - revert unintended change of mailbox in bcm283x.dtsi
> - add reference for arm64
> 
> [1] - https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm2711/rpi_DATA_2711_1p0_preliminary.pdf
> [2] - https://www.raspberrypi.org/documentation/hardware/raspberrypi/schematics/rpi_SCH_4b_4p0_reduced.pdf
> 
> Stefan Wahren (10):
>   bluetooth: hci_bcm: Fix RTS handling during startup
>   ARM: dts: bcm283x: Remove simple-bus from fixed clocks
>   ARM: dts: bcm283x: Remove brcm,bcm2835-pl011 compatible
>   ARM: dts: bcm283x: Move BCM2835/6/7 specific to bcm2835-common.dtsi
>   dt-bindings: arm: Convert BCM2835 board/soc bindings to json-schema
>   dt-bindings: arm: bcm2835: Add Raspberry Pi 4 to DT schema
>   ARM: bcm: Add support for BCM2711 SoC
>   ARM: dts: Add minimal Raspberry Pi 4 support
>   arm64: dts: broadcom: Add reference to RPi 4 B
>   MAINTAINERS: Add BCM2711 to BCM2835 ARCH
> 
>  .../devicetree/bindings/arm/bcm/bcm2835.yaml       |  54 ++
>  .../devicetree/bindings/arm/bcm/brcm,bcm2835.txt   |  67 --
>  MAINTAINERS                                        |   3 +-
>  arch/arm/boot/dts/Makefile                         |   1 +
>  arch/arm/boot/dts/bcm2711-rpi-4-b.dts              | 123 +++
>  arch/arm/boot/dts/bcm2711.dtsi                     | 844 +++++++++++++++++++++
>  arch/arm/boot/dts/bcm2835-common.dtsi              | 194 +++++
>  arch/arm/boot/dts/bcm2835-rpi.dtsi                 |   4 -
>  arch/arm/boot/dts/bcm2835.dtsi                     |   1 +
>  arch/arm/boot/dts/bcm2836.dtsi                     |   1 +
>  arch/arm/boot/dts/bcm2837.dtsi                     |   1 +
>  arch/arm/boot/dts/bcm283x-rpi-usb-peripheral.dtsi  |   7 +
>  arch/arm/boot/dts/bcm283x.dtsi                     | 190 +----
>  arch/arm/mach-bcm/Kconfig                          |   4 +-
>  arch/arm/mach-bcm/Makefile                         |   3 +-
>  arch/arm/mach-bcm/bcm2711.c                        |  24 +
>  arch/arm64/Kconfig.platforms                       |   5 +-
>  arch/arm64/boot/dts/broadcom/Makefile              |   3 +-
>  arch/arm64/boot/dts/broadcom/bcm2711-rpi-4-b.dts   |   2 +
>  drivers/bluetooth/hci_bcm.c                        |   2 +
>  20 files changed, 1272 insertions(+), 261 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml
>  delete mode 100644 Documentation/devicetree/bindings/arm/bcm/brcm,bcm2835.txt
>  create mode 100644 arch/arm/boot/dts/bcm2711-rpi-4-b.dts
>  create mode 100644 arch/arm/boot/dts/bcm2711.dtsi
>  create mode 100644 arch/arm/boot/dts/bcm2835-common.dtsi
>  create mode 100644 arch/arm/boot/dts/bcm283x-rpi-usb-peripheral.dtsi
>  create mode 100644 arch/arm/mach-bcm/bcm2711.c
>  create mode 100644 arch/arm64/boot/dts/broadcom/bcm2711-rpi-4-b.dts
> 
> --
> 2.7.4
> 
> 
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