[v3,0/2] Add SPI control driver for Sunplus SP7021 SoC

This is a patch series for SPI driver for Sunplus SP7021 SoC.

Sunplus SP7021 is an ARM Cortex A7 (4 cores) based SoC. It integrates
many peripherals (ex: UART, I2C, SPI, SDIO, eMMC, USB, SD card and
etc.) into a single chip. It is designed for industrial control.

Refer to:
https://sunplus-tibbo.atlassian.net/wiki/spaces/doc/overview
https://tibbo.com/store/plus1.html

LH.Kuo (2):
  SPI: Add SPI driver for Sunplus SP7021
  devicetree: bindings SPI Add bindings doc for Sunplus SP7021

 .../bindings/spi/spi-sunplus-sp7021.yaml           |  95 +++
 MAINTAINERS                                        |   7 +
 drivers/spi/Kconfig                                |  11 +
 drivers/spi/Makefile                               |   1 +
 drivers/spi/spi-sunplus-sp7021.c                   | 706 +++++++++++++++++++++
 5 files changed, 820 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spi/spi-sunplus-sp7021.yaml
 create mode 100644 drivers/spi/spi-sunplus-sp7021.c

On Mon, Nov 22, 2021 at 10:33:33AM +0800, LH.Kuo wrote:
> Add devicetree bindings SPI Add bindings doc for Sunplus SP7021
> 
> Signed-off-by: LH.Kuo <lh.kuo@sunplus.com>

Again, From and S-o-b must match.

> ---
> Changes in v3:
>  - Addressed all comments from Mr. Mark Brown
>  - Addressed all comments from Mr. Philipp Zabel
>  - Addressed all comments from Mr. Rob Herring
>  - remove spi transfer_one_message
> 
>  .../bindings/spi/spi-sunplus-sp7021.yaml           | 95 ++++++++++++++++++++++
>  MAINTAINERS                                        |  1 +
>  2 files changed, 96 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/spi/spi-sunplus-sp7021.yaml
> 
> diff --git a/Documentation/devicetree/bindings/spi/spi-sunplus-sp7021.yaml b/Documentation/devicetree/bindings/spi/spi-sunplus-sp7021.yaml
> new file mode 100644
> index 0000000..5502f15
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/spi/spi-sunplus-sp7021.yaml
> @@ -0,0 +1,95 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +# Copyright (C) Sunplus Co., Ltd. 2021
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/spi/spi-sunplus-sp7021.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Sunplus sp7021 SPI controller
> +
> +allOf:
> +  - $ref: "spi-controller.yaml"
> +
> +maintainers:
> +  - lh.kuo <lh.kuo@sunplus.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - sunplus,sp7021-spi-controller

I think you can drop '-controller'.

> +
> +  reg:
> +    items:
> +      - description: Base address and length of the SPI master registers
> +      - description: Base address and length of the SPI slave registers

Drop 'Base address and length of '. The rest is sufficient.

> +
> +  reg-names:
> +    items:
> +      - const: spi_master
> +      - const: spi_slave

Drop 'spi_'.

> +
> +  interrupt-names:
> +    items:
> +      - const: dma_w_intr
> +      - const: mas_risc_intr
> +      - const: slave_risc_intr

Drop '_intr', it's redundant.

> +
> +  interrupts:
> +    minItems: 3
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clocks-names:
> +    items:
> +      - const: sys_pll
> +
> +  resets:
> +    maxItems: 1
> +
> +  pinctrl-names:
> +    description:
> +      A pinctrl state named "default" must be defined.
> +    const: default
> +
> +  pinctrl-0:
> +    description:
> +      A phandle to the default pinctrl state.
> +
> +required:
> +  - compatible
> +  - reg
> +  - reg-names
> +  - interrupts
> +  - interrupt-names
> +  - clocks
> +  - clocks-names
> +  - resets
> +  - pinctrl-names
> +  - pinctrl-0
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/sp-sp7021.h>
> +    #include <dt-bindings/reset/sp-sp7021.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    spi@9C002D80 {
> +        compatible = "sunplus,sp7021-spi-controller";
> +        reg = <0x9C002D80 0x80>, <0x9C002E00 0x80>;
> +        reg-names = "spi_master", "spi_slave";
> +        interrupt-parent = <&intc>;
> +        interrupt-names = "dma_w_intr",
> +                          "mas_risc_intr",
> +                          "slave_risc_intr";
> +        interrupts = <144 IRQ_TYPE_LEVEL_HIGH>,
> +                     <146 IRQ_TYPE_LEVEL_HIGH>,
> +                     <145 IRQ_TYPE_LEVEL_HIGH>;
> +        clocks = <&clkc SPI_COMBO_0>;
> +        clocks-names = "sys_pll";
> +        resets = <&rstc RST_SPI_COMBO_0>;
> +        pinctrl-names = "default";
> +        pinctrl-0 = <&pins_spi0>;
> +    };
> +...
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 75fa7d5..88f3747 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -18220,6 +18220,7 @@ SUNPLUS SPI CONTROLLER INTERFACE DRIVER
>  M:	LH Kuo <lh.kuo@sunplus.com>
>  L:	linux-spi@vger.kernel.org
>  S:	Maintained
> +F:	Documentation/devicetree/bindings/spi/spi-sunplus-sp7021.yaml
>  F:	drivers/spi/spi-sunplus-sp7021.c
>  
>  SUPERH
> -- 
> 2.7.4
> 
>