[v3,00/10] riscv: add Bouffalolab bl808 support

This series adds Bouffalolab uart driver and basic devicetrees for
Bouffalolab bl808 SoC and Sipeed M1s dock board.

Since v2:
  - fix dt_binding_check and dtbs_check warnings
  - use uart_port_tx_limited() helper in uart driver
  - collect Acked-by/Reviewed-by tag
  - uart0 -> uart3
  - update "riscv,ndev" property
  - mv vendor prefix binding as the first patch
  - add compatible string for bouffalolab bl808 plic

Since v1:
  - use FIELD_PREP and FIELD_GET macro
  - rewrite bflb_uart_tx_chars()
  - add vendor prefix for bouffalolab
  - add dt binding for bl808 compatibles
  - enable SOC_BOUFFALOLAB in defconfig
  - collect Reviewed-by tag
  - modify commit-msg as suggested


Jisheng Zhang (10):
  dt-bindings: vendor-prefixes: add bouffalolab
  dt-bindings: interrupt-controller: Add bouffalolab bl808 plic
  dt-bindings: serial: add documentation for Bouffalolab UART Driver
  serial: bflb_uart: add Bouffalolab UART Driver
  riscv: add the Bouffalolab SoC family Kconfig option
  dt-bindings: riscv: Add bouffalolab bl808 board compatibles
  riscv: dts: bouffalolab: add the bl808 SoC base device tree
  riscv: dts: bouffalolab: add Sipeed M1s SoM and Dock devicetree
  MAINTAINERS: riscv: add entry for Bouffalolab SoC
  riscv: defconfig: enable BOUFFALOLAB SoC

 .../sifive,plic-1.0.0.yaml                    |   1 +
 .../bindings/riscv/bouffalolab.yaml           |  29 +
 .../serial/bouffalolab,bl808-uart.yaml        |  47 ++
 .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
 MAINTAINERS                                   |   7 +
 arch/riscv/Kconfig.socs                       |   5 +
 arch/riscv/boot/dts/Makefile                  |   1 +
 arch/riscv/boot/dts/bouffalolab/Makefile      |   2 +
 .../dts/bouffalolab/bl808-sipeed-m1s-dock.dts |  25 +
 .../dts/bouffalolab/bl808-sipeed-m1s.dtsi     |  21 +
 arch/riscv/boot/dts/bouffalolab/bl808.dtsi    |  73 +++
 arch/riscv/configs/defconfig                  |   1 +
 drivers/tty/serial/Kconfig                    |  18 +
 drivers/tty/serial/Makefile                   |   1 +
 drivers/tty/serial/bflb_uart.c                | 586 ++++++++++++++++++
 include/uapi/linux/serial_core.h              |   3 +
 16 files changed, 822 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/riscv/bouffalolab.yaml
 create mode 100644 Documentation/devicetree/bindings/serial/bouffalolab,bl808-uart.yaml
 create mode 100644 arch/riscv/boot/dts/bouffalolab/Makefile
 create mode 100644 arch/riscv/boot/dts/bouffalolab/bl808-sipeed-m1s-dock.dts
 create mode 100644 arch/riscv/boot/dts/bouffalolab/bl808-sipeed-m1s.dtsi
 create mode 100644 arch/riscv/boot/dts/bouffalolab/bl808.dtsi
 create mode 100644 drivers/tty/serial/bflb_uart.c

On Mon, 15 May 2023 00:56:44 +0800, Jisheng Zhang wrote:
> Add bindings doc for Bouffalolab UART Driver
> 
> Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
> Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
> ---
>  .../serial/bouffalolab,bl808-uart.yaml        | 47 +++++++++++++++++++
>  1 file changed, 47 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/serial/bouffalolab,bl808-uart.yaml
> 

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:

dtschema/dtc warnings/errors:
./Documentation/devicetree/bindings/serial/bouffalolab,bl808-uart.yaml: $id: relative path/filename doesn't match actual path or filename
	expected: http://devicetree.org/schemas/serial/bouffalolab,bl808-uart.yaml#

See https://patchwork.ozlabs.org/patch/1781053

This check can fail if there are any dependencies. The base for a patch
series is generally the most recent rc1.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit.

On Mon, May 15, 2023 at 07:28:10AM +0800, Jisheng Zhang wrote:
> On Sun, May 14, 2023 at 07:17:27PM +0100, Conor Dooley wrote:
> > On Mon, May 15, 2023 at 12:56:44AM +0800, Jisheng Zhang wrote:
> > 
> > > +$id: http://devicetree.org/schemas/serial/bouffalolab,uart.yaml#
> > 
> > $id: relative path/filename doesn't match actual path or filename
> >         expected: http://devicetree.org/schemas/serial/bouffalolab,bl808-uart.yaml#
> > 
> > Please test the bindings before submission - even dtbs_check catches
> > that one!
> 
> Aha, I knew the reason. I did run dt_binding_check and dtbs_check,
> but then I read one of comments in v2 which suggests the renaming,
> that's to say the dtbs_check is done before the renmaing. Sorry for
> confusion

No worries.
Serial aisde, rest of the series looks grand to me, perhaps you want to
resubmit the serial bits separately & I'll grab the riscv bits once the
serial side is sorted out?