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[2/2] spi: dt-bindings: samsung: convert to dtschema

Message ID 20220102155807.42758-2-krzysztof.kozlowski@canonical.com (mailing list archive)
State New, archived
Headers show
Series [1/2] ARM: dts: exynos: split dmas into array of phandles in Exynos5250 | expand

Commit Message

Krzysztof Kozlowski Jan. 2, 2022, 3:58 p.m. UTC
Convert the Samsung SoC (S3C24xx, S3C64xx, S5Pv210, Exynos) SPI
controller bindings to DT schema format

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
---
 .../devicetree/bindings/spi/samsung,spi.yaml  | 220 ++++++++++++++++++
 .../devicetree/bindings/spi/spi-samsung.txt   | 122 ----------
 MAINTAINERS                                   |   2 +-
 3 files changed, 221 insertions(+), 123 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/spi/samsung,spi.yaml
 delete mode 100644 Documentation/devicetree/bindings/spi/spi-samsung.txt

Comments

Sam Protsenko Jan. 3, 2022, 2:41 p.m. UTC | #1
On Sun, 2 Jan 2022 at 17:58, Krzysztof Kozlowski
<krzysztof.kozlowski@canonical.com> wrote:
>
> Convert the Samsung SoC (S3C24xx, S3C64xx, S5Pv210, Exynos) SPI
> controller bindings to DT schema format
>
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
> ---
>  .../devicetree/bindings/spi/samsung,spi.yaml  | 220 ++++++++++++++++++
>  .../devicetree/bindings/spi/spi-samsung.txt   | 122 ----------
>  MAINTAINERS                                   |   2 +-
>  3 files changed, 221 insertions(+), 123 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/spi/samsung,spi.yaml
>  delete mode 100644 Documentation/devicetree/bindings/spi/spi-samsung.txt
>
> diff --git a/Documentation/devicetree/bindings/spi/samsung,spi.yaml b/Documentation/devicetree/bindings/spi/samsung,spi.yaml
> new file mode 100644
> index 000000000000..195bfafe05fd
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/spi/samsung,spi.yaml
> @@ -0,0 +1,220 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/spi/samsung,spi.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Samsung S3C/S5P/Exynos SoC SPI controller
> +
> +maintainers:
> +  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
> +
> +description:
> +  All the SPI controller nodes should be represented in the aliases node using
> +  the following format 'spi{n}' where n is a unique number for the alias.
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - enum:
> +          - samsung,s3c2443-spi

Maybe add the list of supported platforms for each compatible (in a
comment on the same line), like it was done in .txt binding?

Other than that:

Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>

> +          - samsung,s3c6410-spi
> +          - samsung,s5pv210-spi
> +          - samsung,exynos5433-spi
> +      - const: samsung,exynos7-spi
> +        deprecated: true
> +
> +  clocks:
> +    minItems: 2
> +    maxItems: 3
> +
> +  clock-names:
> +    minItems: 2
> +    maxItems: 3
> +
> +  cs-gpios: true
> +
> +  dmas:
> +    minItems: 2
> +    maxItems: 2
> +
> +  dma-names:
> +    items:
> +      - const: tx
> +      - const: rx
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  no-cs-readback:
> +    description:
> +      The CS line is disconnected, therefore the device should not operate
> +      based on CS signalling.
> +    type: boolean
> +
> +  num-cs:
> +    minimum: 1
> +    maximum: 4
> +    default: 1
> +
> +  samsung,spi-src-clk:
> +    description:
> +      If the spi controller includes a internal clock mux to select the clock
> +      source for the spi bus clock, this property can be used to indicate the
> +      clock to be used for driving the spi bus clock. If not specified, the
> +      clock number 0 is used as default.
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    default: 0
> +
> +  reg:
> +    maxItems: 1
> +
> +patternProperties:
> +  "^.*@[0-9a-f]+$":
> +    type: object
> +
> +    allOf:
> +      - $ref: spi-peripheral-props.yaml
> +
> +    properties:
> +      controller-data:
> +        type: object
> +        additionalProperties: false
> +
> +        properties:
> +          samsung,spi-feedback-delay:
> +            description: |
> +              The sampling phase shift to be applied on the miso line (to account
> +              for any lag in the miso line). Valid values:
> +               - 0: No phase shift.
> +               - 1: 90 degree phase shift sampling.
> +               - 2: 180 degree phase shift sampling.
> +               - 3: 270 degree phase shift sampling.
> +            $ref: /schemas/types.yaml#/definitions/uint32
> +            enum: [0, 1, 2, 3]
> +
> +        required:
> +          - samsung,spi-feedback-delay
> +
> +    required:
> +      - controller-data
> +
> +    unevaluatedProperties: false
> +
> +required:
> +  - compatible
> +  - clocks
> +  - clock-names
> +  - dmas
> +  - dma-names
> +  - interrupts
> +  - reg
> +
> +allOf:
> +  - $ref: spi-controller.yaml#
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: samsung,exynos5433-spi
> +    then:
> +      properties:
> +        clocks:
> +          minItems: 3
> +          maxItems: 3
> +        clock-names:
> +          items:
> +            - const: spi
> +            - enum:
> +                - spi_busclk0
> +                - spi_busclk1
> +                - spi_busclk2
> +                - spi_busclk3
> +            - const: spi_ioclk
> +    else:
> +      properties:
> +        clocks:
> +          minItems: 2
> +          maxItems: 2
> +        clock-names:
> +          items:
> +            - const: spi
> +            - enum:
> +                - spi_busclk0
> +                - spi_busclk1
> +                - spi_busclk2
> +                - spi_busclk3
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/exynos5433.h>
> +    #include <dt-bindings/clock/samsung,s2mps11.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/gpio/gpio.h>
> +
> +    spi@14d30000 {
> +        compatible = "samsung,exynos5433-spi";
> +        reg = <0x14d30000 0x100>;
> +        interrupts = <GIC_SPI 433 IRQ_TYPE_LEVEL_HIGH>;
> +        dmas = <&pdma0 11>, <&pdma0 10>;
> +        dma-names = "tx", "rx";
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +        clocks = <&cmu_peric CLK_PCLK_SPI1>,
> +                 <&cmu_peric CLK_SCLK_SPI1>,
> +                 <&cmu_peric CLK_SCLK_IOCLK_SPI1>;
> +        clock-names = "spi",
> +                      "spi_busclk0",
> +                      "spi_ioclk";
> +        samsung,spi-src-clk = <0>;
> +        pinctrl-names = "default";
> +        pinctrl-0 = <&spi1_bus>;
> +        num-cs = <1>;
> +
> +        cs-gpios = <&gpd6 3 GPIO_ACTIVE_HIGH>;
> +        status = "okay";
> +
> +        audio-codec@0 {
> +            compatible = "wlf,wm5110";
> +            reg = <0x0>;
> +            spi-max-frequency = <20000000>;
> +            interrupt-parent = <&gpa0>;
> +            interrupts = <4 IRQ_TYPE_NONE>;
> +            clocks = <&pmu_system_controller 0>,
> +                     <&s2mps13_osc S2MPS11_CLK_BT>;
> +            clock-names = "mclk1", "mclk2";
> +
> +            gpio-controller;
> +            #gpio-cells = <2>;
> +            interrupt-controller;
> +            #interrupt-cells = <2>;
> +
> +            wlf,micd-detect-debounce = <300>;
> +            wlf,micd-bias-start-time = <0x1>;
> +            wlf,micd-rate = <0x7>;
> +            wlf,micd-dbtime = <0x2>;
> +            wlf,micd-force-micbias;
> +            wlf,micd-configs = <0x0 1 0>;
> +            wlf,hpdet-channel = <1>;
> +            wlf,gpsw = <0x1>;
> +            wlf,inmode = <2 0 2 0>;
> +
> +            wlf,reset = <&gpc0 7 GPIO_ACTIVE_HIGH>;
> +            wlf,ldoena = <&gpf0 0 GPIO_ACTIVE_HIGH>;
> +
> +            /* core supplies */
> +            AVDD-supply = <&ldo18_reg>;
> +            DBVDD1-supply = <&ldo18_reg>;
> +            CPVDD-supply = <&ldo18_reg>;
> +            DBVDD2-supply = <&ldo18_reg>;
> +            DBVDD3-supply = <&ldo18_reg>;
> +            SPKVDDL-supply = <&ldo18_reg>;
> +            SPKVDDR-supply = <&ldo18_reg>;
> +
> +            controller-data {
> +                samsung,spi-feedback-delay = <0>;
> +            };
> +        };
> +    };
> diff --git a/Documentation/devicetree/bindings/spi/spi-samsung.txt b/Documentation/devicetree/bindings/spi/spi-samsung.txt
> deleted file mode 100644
> index 49028a4f5df1..000000000000
> --- a/Documentation/devicetree/bindings/spi/spi-samsung.txt
> +++ /dev/null
> @@ -1,122 +0,0 @@
> -* Samsung SPI Controller
> -
> -The Samsung SPI controller is used to interface with various devices such as flash
> -and display controllers using the SPI communication interface.
> -
> -Required SoC Specific Properties:
> -
> -- compatible: should be one of the following.
> -    - samsung,s3c2443-spi: for s3c2443, s3c2416 and s3c2450 platforms
> -    - samsung,s3c6410-spi: for s3c6410 platforms
> -    - samsung,s5pv210-spi: for s5pv210 and s5pc110 platforms
> -    - samsung,exynos5433-spi: for exynos5433 compatible controllers
> -    - samsung,exynos7-spi: for exynos7 platforms <DEPRECATED>
> -
> -- reg: physical base address of the controller and length of memory mapped
> -  region.
> -
> -- interrupts: The interrupt number to the cpu. The interrupt specifier format
> -  depends on the interrupt controller.
> -
> -- dmas : Two or more DMA channel specifiers following the convention outlined
> -  in bindings/dma/dma.txt
> -
> -- dma-names: Names for the dma channels. There must be at least one channel
> -  named "tx" for transmit and named "rx" for receive.
> -
> -- clocks: specifies the clock IDs provided to the SPI controller; they are
> -  required for interacting with the controller itself, for synchronizing the bus
> -  and as I/O clock (the latter is required by exynos5433 and exynos7).
> -
> -- clock-names: string names of the clocks in the 'clocks' property; for all the
> -  the devices the names must be "spi", "spi_busclkN" (where N is determined by
> -  "samsung,spi-src-clk"), while Exynos5433 should specify a third clock
> -  "spi_ioclk" for the I/O clock.
> -
> -Required Board Specific Properties:
> -
> -- #address-cells: should be 1.
> -- #size-cells: should be 0.
> -
> -Optional Board Specific Properties:
> -
> -- samsung,spi-src-clk: If the spi controller includes a internal clock mux to
> -  select the clock source for the spi bus clock, this property can be used to
> -  indicate the clock to be used for driving the spi bus clock. If not specified,
> -  the clock number 0 is used as default.
> -
> -- num-cs: Specifies the number of chip select lines supported. If
> -  not specified, the default number of chip select lines is set to 1.
> -
> -- cs-gpios: should specify GPIOs used for chipselects (see spi-bus.txt)
> -
> -- no-cs-readback: the CS line is disconnected, therefore the device should not
> -  operate based on CS signalling.
> -
> -SPI Controller specific data in SPI slave nodes:
> -
> -- The spi slave nodes should provide the following information which is required
> -  by the spi controller.
> -
> -  - samsung,spi-feedback-delay: The sampling phase shift to be applied on the
> -    miso line (to account for any lag in the miso line). The following are the
> -    valid values.
> -
> -      - 0: No phase shift.
> -      - 1: 90 degree phase shift sampling.
> -      - 2: 180 degree phase shift sampling.
> -      - 3: 270 degree phase shift sampling.
> -
> -Aliases:
> -
> -- All the SPI controller nodes should be represented in the aliases node using
> -  the following format 'spi{n}' where n is a unique number for the alias.
> -
> -
> -Example:
> -
> -- SoC Specific Portion:
> -
> -       spi_0: spi@12d20000 {
> -               compatible = "samsung,exynos4210-spi";
> -               reg = <0x12d20000 0x100>;
> -               interrupts = <0 66 0>;
> -               dmas = <&pdma0 5
> -                       &pdma0 4>;
> -               dma-names = "tx", "rx";
> -               #address-cells = <1>;
> -               #size-cells = <0>;
> -       };
> -
> -- Board Specific Portion:
> -
> -       spi_0: spi@12d20000 {
> -               #address-cells = <1>;
> -               #size-cells = <0>;
> -               pinctrl-names = "default";
> -               pinctrl-0 = <&spi0_bus>;
> -               cs-gpios = <&gpa2 5 0>;
> -
> -               w25q80bw@0 {
> -                       #address-cells = <1>;
> -                       #size-cells = <1>;
> -                       compatible = "w25x80";
> -                       reg = <0>;
> -                       spi-max-frequency = <10000>;
> -
> -                       controller-data {
> -                               samsung,spi-feedback-delay = <0>;
> -                       };
> -
> -                       partition@0 {
> -                               label = "U-Boot";
> -                               reg = <0x0 0x40000>;
> -                               read-only;
> -                       };
> -
> -                       partition@40000 {
> -                               label = "Kernel";
> -                               reg = <0x40000 0xc0000>;
> -                       };
> -               };
> -       };
> diff --git a/MAINTAINERS b/MAINTAINERS
> index af392bd04874..572eb97f1855 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -17058,7 +17058,7 @@ M:      Andi Shyti <andi@etezian.org>
>  L:     linux-spi@vger.kernel.org
>  L:     linux-samsung-soc@vger.kernel.org
>  S:     Maintained
> -F:     Documentation/devicetree/bindings/spi/spi-samsung.txt
> +F:     Documentation/devicetree/bindings/spi/samsung,spi.yaml
>  F:     drivers/spi/spi-s3c*
>  F:     include/linux/platform_data/spi-s3c64xx.h
>  F:     include/linux/spi/s3c24xx-fiq.h
> --
> 2.32.0
>
Rob Herring Jan. 4, 2022, 4:47 p.m. UTC | #2
On Sun, Jan 02, 2022 at 04:58:07PM +0100, Krzysztof Kozlowski wrote:
> Convert the Samsung SoC (S3C24xx, S3C64xx, S5Pv210, Exynos) SPI
> controller bindings to DT schema format
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
> ---
>  .../devicetree/bindings/spi/samsung,spi.yaml  | 220 ++++++++++++++++++
>  .../devicetree/bindings/spi/spi-samsung.txt   | 122 ----------
>  MAINTAINERS                                   |   2 +-
>  3 files changed, 221 insertions(+), 123 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/spi/samsung,spi.yaml
>  delete mode 100644 Documentation/devicetree/bindings/spi/spi-samsung.txt
> 
> diff --git a/Documentation/devicetree/bindings/spi/samsung,spi.yaml b/Documentation/devicetree/bindings/spi/samsung,spi.yaml
> new file mode 100644
> index 000000000000..195bfafe05fd
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/spi/samsung,spi.yaml
> @@ -0,0 +1,220 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/spi/samsung,spi.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Samsung S3C/S5P/Exynos SoC SPI controller
> +
> +maintainers:
> +  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
> +
> +description:
> +  All the SPI controller nodes should be represented in the aliases node using
> +  the following format 'spi{n}' where n is a unique number for the alias.
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - enum:
> +          - samsung,s3c2443-spi
> +          - samsung,s3c6410-spi
> +          - samsung,s5pv210-spi
> +          - samsung,exynos5433-spi
> +      - const: samsung,exynos7-spi
> +        deprecated: true
> +
> +  clocks:
> +    minItems: 2
> +    maxItems: 3
> +
> +  clock-names:
> +    minItems: 2
> +    maxItems: 3
> +
> +  cs-gpios: true
> +
> +  dmas:
> +    minItems: 2
> +    maxItems: 2
> +
> +  dma-names:
> +    items:
> +      - const: tx
> +      - const: rx
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  no-cs-readback:
> +    description:
> +      The CS line is disconnected, therefore the device should not operate
> +      based on CS signalling.
> +    type: boolean
> +
> +  num-cs:
> +    minimum: 1
> +    maximum: 4
> +    default: 1
> +
> +  samsung,spi-src-clk:
> +    description:
> +      If the spi controller includes a internal clock mux to select the clock
> +      source for the spi bus clock, this property can be used to indicate the
> +      clock to be used for driving the spi bus clock. If not specified, the
> +      clock number 0 is used as default.
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    default: 0
> +
> +  reg:
> +    maxItems: 1
> +
> +patternProperties:
> +  "^.*@[0-9a-f]+$":
> +    type: object
> +
> +    allOf:
> +      - $ref: spi-peripheral-props.yaml
> +
> +    properties:
> +      controller-data:
> +        type: object
> +        additionalProperties: false
> +
> +        properties:
> +          samsung,spi-feedback-delay:

All this has to go in it's own schema which then needs to be added to 
spi-peripheral-props.yaml.

> +            description: |
> +              The sampling phase shift to be applied on the miso line (to account
> +              for any lag in the miso line). Valid values:
> +               - 0: No phase shift.
> +               - 1: 90 degree phase shift sampling.
> +               - 2: 180 degree phase shift sampling.
> +               - 3: 270 degree phase shift sampling.
> +            $ref: /schemas/types.yaml#/definitions/uint32
> +            enum: [0, 1, 2, 3]
> +
> +        required:
> +          - samsung,spi-feedback-delay
> +
> +    required:
> +      - controller-data

Not really great that this is required and there's not some default that 
works.

> +
> +    unevaluatedProperties: false
> +
> +required:
> +  - compatible
> +  - clocks
> +  - clock-names
> +  - dmas
> +  - dma-names
> +  - interrupts
> +  - reg
> +
> +allOf:
> +  - $ref: spi-controller.yaml#
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: samsung,exynos5433-spi
> +    then:
> +      properties:
> +        clocks:
> +          minItems: 3
> +          maxItems: 3
> +        clock-names:
> +          items:
> +            - const: spi
> +            - enum:
> +                - spi_busclk0
> +                - spi_busclk1
> +                - spi_busclk2
> +                - spi_busclk3
> +            - const: spi_ioclk
> +    else:
> +      properties:
> +        clocks:
> +          minItems: 2
> +          maxItems: 2
> +        clock-names:
> +          items:
> +            - const: spi
> +            - enum:
> +                - spi_busclk0
> +                - spi_busclk1
> +                - spi_busclk2
> +                - spi_busclk3
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/exynos5433.h>
> +    #include <dt-bindings/clock/samsung,s2mps11.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/gpio/gpio.h>
> +
> +    spi@14d30000 {
> +        compatible = "samsung,exynos5433-spi";
> +        reg = <0x14d30000 0x100>;
> +        interrupts = <GIC_SPI 433 IRQ_TYPE_LEVEL_HIGH>;
> +        dmas = <&pdma0 11>, <&pdma0 10>;
> +        dma-names = "tx", "rx";
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +        clocks = <&cmu_peric CLK_PCLK_SPI1>,
> +                 <&cmu_peric CLK_SCLK_SPI1>,
> +                 <&cmu_peric CLK_SCLK_IOCLK_SPI1>;
> +        clock-names = "spi",
> +                      "spi_busclk0",
> +                      "spi_ioclk";
> +        samsung,spi-src-clk = <0>;
> +        pinctrl-names = "default";
> +        pinctrl-0 = <&spi1_bus>;
> +        num-cs = <1>;
> +
> +        cs-gpios = <&gpd6 3 GPIO_ACTIVE_HIGH>;
> +        status = "okay";

Don't need 'status' in examples.

> +        audio-codec@0 {
> +            compatible = "wlf,wm5110";
> +            reg = <0x0>;
> +            spi-max-frequency = <20000000>;
> +            interrupt-parent = <&gpa0>;
> +            interrupts = <4 IRQ_TYPE_NONE>;
> +            clocks = <&pmu_system_controller 0>,
> +                     <&s2mps13_osc S2MPS11_CLK_BT>;
> +            clock-names = "mclk1", "mclk2";
> +
> +            gpio-controller;
> +            #gpio-cells = <2>;
> +            interrupt-controller;
> +            #interrupt-cells = <2>;
> +
> +            wlf,micd-detect-debounce = <300>;
> +            wlf,micd-bias-start-time = <0x1>;
> +            wlf,micd-rate = <0x7>;
> +            wlf,micd-dbtime = <0x2>;
> +            wlf,micd-force-micbias;
> +            wlf,micd-configs = <0x0 1 0>;
> +            wlf,hpdet-channel = <1>;
> +            wlf,gpsw = <0x1>;
> +            wlf,inmode = <2 0 2 0>;
> +
> +            wlf,reset = <&gpc0 7 GPIO_ACTIVE_HIGH>;
> +            wlf,ldoena = <&gpf0 0 GPIO_ACTIVE_HIGH>;
> +
> +            /* core supplies */
> +            AVDD-supply = <&ldo18_reg>;
> +            DBVDD1-supply = <&ldo18_reg>;
> +            CPVDD-supply = <&ldo18_reg>;
> +            DBVDD2-supply = <&ldo18_reg>;
> +            DBVDD3-supply = <&ldo18_reg>;
> +            SPKVDDL-supply = <&ldo18_reg>;
> +            SPKVDDR-supply = <&ldo18_reg>;
> +
> +            controller-data {

The schema didn't get checked since spi-peripheral-props.yaml isn't 
yet in my tree, but I'd expect this to be a warning. If not its schema 
needs to be a bit stricter. The schema for "wlf,wm5110" will need to 
reference spi-peripheral-props.yaml. (Actually, all SPI peripheral 
device schemas will need a reference in theory, but really we only care 
for devices used with controllers with extra properties). 

Rob
Krzysztof Kozlowski Jan. 10, 2022, 3:10 p.m. UTC | #3
On 03/01/2022 15:41, Sam Protsenko wrote:
> On Sun, 2 Jan 2022 at 17:58, Krzysztof Kozlowski
> <krzysztof.kozlowski@canonical.com> wrote:
>>
>> Convert the Samsung SoC (S3C24xx, S3C64xx, S5Pv210, Exynos) SPI
>> controller bindings to DT schema format
>>
>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
>> ---
>>  .../devicetree/bindings/spi/samsung,spi.yaml  | 220 ++++++++++++++++++
>>  .../devicetree/bindings/spi/spi-samsung.txt   | 122 ----------
>>  MAINTAINERS                                   |   2 +-
>>  3 files changed, 221 insertions(+), 123 deletions(-)
>>  create mode 100644 Documentation/devicetree/bindings/spi/samsung,spi.yaml
>>  delete mode 100644 Documentation/devicetree/bindings/spi/spi-samsung.txt
>>
>> diff --git a/Documentation/devicetree/bindings/spi/samsung,spi.yaml b/Documentation/devicetree/bindings/spi/samsung,spi.yaml
>> new file mode 100644
>> index 000000000000..195bfafe05fd
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/spi/samsung,spi.yaml
>> @@ -0,0 +1,220 @@
>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/spi/samsung,spi.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Samsung S3C/S5P/Exynos SoC SPI controller
>> +
>> +maintainers:
>> +  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
>> +
>> +description:
>> +  All the SPI controller nodes should be represented in the aliases node using
>> +  the following format 'spi{n}' where n is a unique number for the alias.
>> +
>> +properties:
>> +  compatible:
>> +    oneOf:
>> +      - enum:
>> +          - samsung,s3c2443-spi
> 
> Maybe add the list of supported platforms for each compatible (in a
> comment on the same line), like it was done in .txt binding?
> 
> Other than that:
> 

Sure.


Best regards,
Krzysztof
Krzysztof Kozlowski Jan. 10, 2022, 3:52 p.m. UTC | #4
On 04/01/2022 17:47, Rob Herring wrote:
> On Sun, Jan 02, 2022 at 04:58:07PM +0100, Krzysztof Kozlowski wrote:
>> Convert the Samsung SoC (S3C24xx, S3C64xx, S5Pv210, Exynos) SPI
>> controller bindings to DT schema format
>>
>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
>> ---
>>  .../devicetree/bindings/spi/samsung,spi.yaml  | 220 ++++++++++++++++++
>>  .../devicetree/bindings/spi/spi-samsung.txt   | 122 ----------
>>  MAINTAINERS                                   |   2 +-
>>  3 files changed, 221 insertions(+), 123 deletions(-)
>>  create mode 100644 Documentation/devicetree/bindings/spi/samsung,spi.yaml
>>  delete mode 100644 Documentation/devicetree/bindings/spi/spi-samsung.txt
>>
>> diff --git a/Documentation/devicetree/bindings/spi/samsung,spi.yaml b/Documentation/devicetree/bindings/spi/samsung,spi.yaml
>> new file mode 100644
>> index 000000000000..195bfafe05fd
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/spi/samsung,spi.yaml
>> @@ -0,0 +1,220 @@
>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/spi/samsung,spi.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Samsung S3C/S5P/Exynos SoC SPI controller
>> +
>> +maintainers:
>> +  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
>> +
>> +description:
>> +  All the SPI controller nodes should be represented in the aliases node using
>> +  the following format 'spi{n}' where n is a unique number for the alias.
>> +
>> +properties:
>> +  compatible:
>> +    oneOf:
>> +      - enum:
>> +          - samsung,s3c2443-spi
>> +          - samsung,s3c6410-spi
>> +          - samsung,s5pv210-spi
>> +          - samsung,exynos5433-spi
>> +      - const: samsung,exynos7-spi
>> +        deprecated: true
>> +
>> +  clocks:
>> +    minItems: 2
>> +    maxItems: 3
>> +
>> +  clock-names:
>> +    minItems: 2
>> +    maxItems: 3
>> +
>> +  cs-gpios: true
>> +
>> +  dmas:
>> +    minItems: 2
>> +    maxItems: 2
>> +
>> +  dma-names:
>> +    items:
>> +      - const: tx
>> +      - const: rx
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +  no-cs-readback:
>> +    description:
>> +      The CS line is disconnected, therefore the device should not operate
>> +      based on CS signalling.
>> +    type: boolean
>> +
>> +  num-cs:
>> +    minimum: 1
>> +    maximum: 4
>> +    default: 1
>> +
>> +  samsung,spi-src-clk:
>> +    description:
>> +      If the spi controller includes a internal clock mux to select the clock
>> +      source for the spi bus clock, this property can be used to indicate the
>> +      clock to be used for driving the spi bus clock. If not specified, the
>> +      clock number 0 is used as default.
>> +    $ref: /schemas/types.yaml#/definitions/uint32
>> +    default: 0
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +patternProperties:
>> +  "^.*@[0-9a-f]+$":
>> +    type: object
>> +
>> +    allOf:
>> +      - $ref: spi-peripheral-props.yaml
>> +
>> +    properties:
>> +      controller-data:
>> +        type: object
>> +        additionalProperties: false
>> +
>> +        properties:
>> +          samsung,spi-feedback-delay:
> 
> All this has to go in it's own schema which then needs to be added to 
> spi-peripheral-props.yaml.

OK

> 
>> +            description: |
>> +              The sampling phase shift to be applied on the miso line (to account
>> +              for any lag in the miso line). Valid values:
>> +               - 0: No phase shift.
>> +               - 1: 90 degree phase shift sampling.
>> +               - 2: 180 degree phase shift sampling.
>> +               - 3: 270 degree phase shift sampling.
>> +            $ref: /schemas/types.yaml#/definitions/uint32
>> +            enum: [0, 1, 2, 3]
>> +
>> +        required:
>> +          - samsung,spi-feedback-delay
>> +
>> +    required:
>> +      - controller-data
> 
> Not really great that this is required and there's not some default that 
> works.

I can make it optional with new kernel. I'll send a follow up patch for
this.

> 
>> +
>> +    unevaluatedProperties: false
>> +
>> +required:
>> +  - compatible
>> +  - clocks
>> +  - clock-names
>> +  - dmas
>> +  - dma-names
>> +  - interrupts
>> +  - reg
>> +
>> +allOf:
>> +  - $ref: spi-controller.yaml#
>> +  - if:
>> +      properties:
>> +        compatible:
>> +          contains:
>> +            const: samsung,exynos5433-spi
>> +    then:
>> +      properties:
>> +        clocks:
>> +          minItems: 3
>> +          maxItems: 3
>> +        clock-names:
>> +          items:
>> +            - const: spi
>> +            - enum:
>> +                - spi_busclk0
>> +                - spi_busclk1
>> +                - spi_busclk2
>> +                - spi_busclk3
>> +            - const: spi_ioclk
>> +    else:
>> +      properties:
>> +        clocks:
>> +          minItems: 2
>> +          maxItems: 2
>> +        clock-names:
>> +          items:
>> +            - const: spi
>> +            - enum:
>> +                - spi_busclk0
>> +                - spi_busclk1
>> +                - spi_busclk2
>> +                - spi_busclk3
>> +
>> +unevaluatedProperties: false
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/clock/exynos5433.h>
>> +    #include <dt-bindings/clock/samsung,s2mps11.h>
>> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
>> +    #include <dt-bindings/gpio/gpio.h>
>> +
>> +    spi@14d30000 {
>> +        compatible = "samsung,exynos5433-spi";
>> +        reg = <0x14d30000 0x100>;
>> +        interrupts = <GIC_SPI 433 IRQ_TYPE_LEVEL_HIGH>;
>> +        dmas = <&pdma0 11>, <&pdma0 10>;
>> +        dma-names = "tx", "rx";
>> +        #address-cells = <1>;
>> +        #size-cells = <0>;
>> +        clocks = <&cmu_peric CLK_PCLK_SPI1>,
>> +                 <&cmu_peric CLK_SCLK_SPI1>,
>> +                 <&cmu_peric CLK_SCLK_IOCLK_SPI1>;
>> +        clock-names = "spi",
>> +                      "spi_busclk0",
>> +                      "spi_ioclk";
>> +        samsung,spi-src-clk = <0>;
>> +        pinctrl-names = "default";
>> +        pinctrl-0 = <&spi1_bus>;
>> +        num-cs = <1>;
>> +
>> +        cs-gpios = <&gpd6 3 GPIO_ACTIVE_HIGH>;
>> +        status = "okay";
> 
> Don't need 'status' in examples.

Sure

> 
>> +        audio-codec@0 {
>> +            compatible = "wlf,wm5110";
>> +            reg = <0x0>;
>> +            spi-max-frequency = <20000000>;
>> +            interrupt-parent = <&gpa0>;
>> +            interrupts = <4 IRQ_TYPE_NONE>;
>> +            clocks = <&pmu_system_controller 0>,
>> +                     <&s2mps13_osc S2MPS11_CLK_BT>;
>> +            clock-names = "mclk1", "mclk2";
>> +
>> +            gpio-controller;
>> +            #gpio-cells = <2>;
>> +            interrupt-controller;
>> +            #interrupt-cells = <2>;
>> +
>> +            wlf,micd-detect-debounce = <300>;
>> +            wlf,micd-bias-start-time = <0x1>;
>> +            wlf,micd-rate = <0x7>;
>> +            wlf,micd-dbtime = <0x2>;
>> +            wlf,micd-force-micbias;
>> +            wlf,micd-configs = <0x0 1 0>;
>> +            wlf,hpdet-channel = <1>;
>> +            wlf,gpsw = <0x1>;
>> +            wlf,inmode = <2 0 2 0>;
>> +
>> +            wlf,reset = <&gpc0 7 GPIO_ACTIVE_HIGH>;
>> +            wlf,ldoena = <&gpf0 0 GPIO_ACTIVE_HIGH>;
>> +
>> +            /* core supplies */
>> +            AVDD-supply = <&ldo18_reg>;
>> +            DBVDD1-supply = <&ldo18_reg>;
>> +            CPVDD-supply = <&ldo18_reg>;
>> +            DBVDD2-supply = <&ldo18_reg>;
>> +            DBVDD3-supply = <&ldo18_reg>;
>> +            SPKVDDL-supply = <&ldo18_reg>;
>> +            SPKVDDR-supply = <&ldo18_reg>;
>> +
>> +            controller-data {
> 
> The schema didn't get checked since spi-peripheral-props.yaml isn't 
> yet in my tree, but I'd expect this to be a warning. If not its schema 
> needs to be a bit stricter. The schema for "wlf,wm5110" will need to 
> reference spi-peripheral-props.yaml. (Actually, all SPI peripheral 
> device schemas will need a reference in theory, but really we only care 
> for devices used with controllers with extra properties). 

I did not see any warnings. I'll modify the wm5110.


Best regards,
Krzysztof
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/spi/samsung,spi.yaml b/Documentation/devicetree/bindings/spi/samsung,spi.yaml
new file mode 100644
index 000000000000..195bfafe05fd
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/samsung,spi.yaml
@@ -0,0 +1,220 @@ 
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/samsung,spi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung S3C/S5P/Exynos SoC SPI controller
+
+maintainers:
+  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+
+description:
+  All the SPI controller nodes should be represented in the aliases node using
+  the following format 'spi{n}' where n is a unique number for the alias.
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - samsung,s3c2443-spi
+          - samsung,s3c6410-spi
+          - samsung,s5pv210-spi
+          - samsung,exynos5433-spi
+      - const: samsung,exynos7-spi
+        deprecated: true
+
+  clocks:
+    minItems: 2
+    maxItems: 3
+
+  clock-names:
+    minItems: 2
+    maxItems: 3
+
+  cs-gpios: true
+
+  dmas:
+    minItems: 2
+    maxItems: 2
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+
+  interrupts:
+    maxItems: 1
+
+  no-cs-readback:
+    description:
+      The CS line is disconnected, therefore the device should not operate
+      based on CS signalling.
+    type: boolean
+
+  num-cs:
+    minimum: 1
+    maximum: 4
+    default: 1
+
+  samsung,spi-src-clk:
+    description:
+      If the spi controller includes a internal clock mux to select the clock
+      source for the spi bus clock, this property can be used to indicate the
+      clock to be used for driving the spi bus clock. If not specified, the
+      clock number 0 is used as default.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 0
+
+  reg:
+    maxItems: 1
+
+patternProperties:
+  "^.*@[0-9a-f]+$":
+    type: object
+
+    allOf:
+      - $ref: spi-peripheral-props.yaml
+
+    properties:
+      controller-data:
+        type: object
+        additionalProperties: false
+
+        properties:
+          samsung,spi-feedback-delay:
+            description: |
+              The sampling phase shift to be applied on the miso line (to account
+              for any lag in the miso line). Valid values:
+               - 0: No phase shift.
+               - 1: 90 degree phase shift sampling.
+               - 2: 180 degree phase shift sampling.
+               - 3: 270 degree phase shift sampling.
+            $ref: /schemas/types.yaml#/definitions/uint32
+            enum: [0, 1, 2, 3]
+
+        required:
+          - samsung,spi-feedback-delay
+
+    required:
+      - controller-data
+
+    unevaluatedProperties: false
+
+required:
+  - compatible
+  - clocks
+  - clock-names
+  - dmas
+  - dma-names
+  - interrupts
+  - reg
+
+allOf:
+  - $ref: spi-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: samsung,exynos5433-spi
+    then:
+      properties:
+        clocks:
+          minItems: 3
+          maxItems: 3
+        clock-names:
+          items:
+            - const: spi
+            - enum:
+                - spi_busclk0
+                - spi_busclk1
+                - spi_busclk2
+                - spi_busclk3
+            - const: spi_ioclk
+    else:
+      properties:
+        clocks:
+          minItems: 2
+          maxItems: 2
+        clock-names:
+          items:
+            - const: spi
+            - enum:
+                - spi_busclk0
+                - spi_busclk1
+                - spi_busclk2
+                - spi_busclk3
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/exynos5433.h>
+    #include <dt-bindings/clock/samsung,s2mps11.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/gpio/gpio.h>
+
+    spi@14d30000 {
+        compatible = "samsung,exynos5433-spi";
+        reg = <0x14d30000 0x100>;
+        interrupts = <GIC_SPI 433 IRQ_TYPE_LEVEL_HIGH>;
+        dmas = <&pdma0 11>, <&pdma0 10>;
+        dma-names = "tx", "rx";
+        #address-cells = <1>;
+        #size-cells = <0>;
+        clocks = <&cmu_peric CLK_PCLK_SPI1>,
+                 <&cmu_peric CLK_SCLK_SPI1>,
+                 <&cmu_peric CLK_SCLK_IOCLK_SPI1>;
+        clock-names = "spi",
+                      "spi_busclk0",
+                      "spi_ioclk";
+        samsung,spi-src-clk = <0>;
+        pinctrl-names = "default";
+        pinctrl-0 = <&spi1_bus>;
+        num-cs = <1>;
+
+        cs-gpios = <&gpd6 3 GPIO_ACTIVE_HIGH>;
+        status = "okay";
+
+        audio-codec@0 {
+            compatible = "wlf,wm5110";
+            reg = <0x0>;
+            spi-max-frequency = <20000000>;
+            interrupt-parent = <&gpa0>;
+            interrupts = <4 IRQ_TYPE_NONE>;
+            clocks = <&pmu_system_controller 0>,
+                     <&s2mps13_osc S2MPS11_CLK_BT>;
+            clock-names = "mclk1", "mclk2";
+
+            gpio-controller;
+            #gpio-cells = <2>;
+            interrupt-controller;
+            #interrupt-cells = <2>;
+
+            wlf,micd-detect-debounce = <300>;
+            wlf,micd-bias-start-time = <0x1>;
+            wlf,micd-rate = <0x7>;
+            wlf,micd-dbtime = <0x2>;
+            wlf,micd-force-micbias;
+            wlf,micd-configs = <0x0 1 0>;
+            wlf,hpdet-channel = <1>;
+            wlf,gpsw = <0x1>;
+            wlf,inmode = <2 0 2 0>;
+
+            wlf,reset = <&gpc0 7 GPIO_ACTIVE_HIGH>;
+            wlf,ldoena = <&gpf0 0 GPIO_ACTIVE_HIGH>;
+
+            /* core supplies */
+            AVDD-supply = <&ldo18_reg>;
+            DBVDD1-supply = <&ldo18_reg>;
+            CPVDD-supply = <&ldo18_reg>;
+            DBVDD2-supply = <&ldo18_reg>;
+            DBVDD3-supply = <&ldo18_reg>;
+            SPKVDDL-supply = <&ldo18_reg>;
+            SPKVDDR-supply = <&ldo18_reg>;
+
+            controller-data {
+                samsung,spi-feedback-delay = <0>;
+            };
+        };
+    };
diff --git a/Documentation/devicetree/bindings/spi/spi-samsung.txt b/Documentation/devicetree/bindings/spi/spi-samsung.txt
deleted file mode 100644
index 49028a4f5df1..000000000000
--- a/Documentation/devicetree/bindings/spi/spi-samsung.txt
+++ /dev/null
@@ -1,122 +0,0 @@ 
-* Samsung SPI Controller
-
-The Samsung SPI controller is used to interface with various devices such as flash
-and display controllers using the SPI communication interface.
-
-Required SoC Specific Properties:
-
-- compatible: should be one of the following.
-    - samsung,s3c2443-spi: for s3c2443, s3c2416 and s3c2450 platforms
-    - samsung,s3c6410-spi: for s3c6410 platforms
-    - samsung,s5pv210-spi: for s5pv210 and s5pc110 platforms
-    - samsung,exynos5433-spi: for exynos5433 compatible controllers
-    - samsung,exynos7-spi: for exynos7 platforms <DEPRECATED>
-
-- reg: physical base address of the controller and length of memory mapped
-  region.
-
-- interrupts: The interrupt number to the cpu. The interrupt specifier format
-  depends on the interrupt controller.
-
-- dmas : Two or more DMA channel specifiers following the convention outlined
-  in bindings/dma/dma.txt
-
-- dma-names: Names for the dma channels. There must be at least one channel
-  named "tx" for transmit and named "rx" for receive.
-
-- clocks: specifies the clock IDs provided to the SPI controller; they are
-  required for interacting with the controller itself, for synchronizing the bus
-  and as I/O clock (the latter is required by exynos5433 and exynos7).
-
-- clock-names: string names of the clocks in the 'clocks' property; for all the
-  the devices the names must be "spi", "spi_busclkN" (where N is determined by
-  "samsung,spi-src-clk"), while Exynos5433 should specify a third clock
-  "spi_ioclk" for the I/O clock.
-
-Required Board Specific Properties:
-
-- #address-cells: should be 1.
-- #size-cells: should be 0.
-
-Optional Board Specific Properties:
-
-- samsung,spi-src-clk: If the spi controller includes a internal clock mux to
-  select the clock source for the spi bus clock, this property can be used to
-  indicate the clock to be used for driving the spi bus clock. If not specified,
-  the clock number 0 is used as default.
-
-- num-cs: Specifies the number of chip select lines supported. If
-  not specified, the default number of chip select lines is set to 1.
-
-- cs-gpios: should specify GPIOs used for chipselects (see spi-bus.txt)
-
-- no-cs-readback: the CS line is disconnected, therefore the device should not
-  operate based on CS signalling.
-
-SPI Controller specific data in SPI slave nodes:
-
-- The spi slave nodes should provide the following information which is required
-  by the spi controller.
-
-  - samsung,spi-feedback-delay: The sampling phase shift to be applied on the
-    miso line (to account for any lag in the miso line). The following are the
-    valid values.
-
-      - 0: No phase shift.
-      - 1: 90 degree phase shift sampling.
-      - 2: 180 degree phase shift sampling.
-      - 3: 270 degree phase shift sampling.
-
-Aliases:
-
-- All the SPI controller nodes should be represented in the aliases node using
-  the following format 'spi{n}' where n is a unique number for the alias.
-
-
-Example:
-
-- SoC Specific Portion:
-
-	spi_0: spi@12d20000 {
-		compatible = "samsung,exynos4210-spi";
-		reg = <0x12d20000 0x100>;
-		interrupts = <0 66 0>;
-		dmas = <&pdma0 5
-			&pdma0 4>;
-		dma-names = "tx", "rx";
-		#address-cells = <1>;
-		#size-cells = <0>;
-	};
-
-- Board Specific Portion:
-
-	spi_0: spi@12d20000 {
-		#address-cells = <1>;
-		#size-cells = <0>;
-		pinctrl-names = "default";
-		pinctrl-0 = <&spi0_bus>;
-		cs-gpios = <&gpa2 5 0>;
-
-		w25q80bw@0 {
-			#address-cells = <1>;
-			#size-cells = <1>;
-			compatible = "w25x80";
-			reg = <0>;
-			spi-max-frequency = <10000>;
-
-			controller-data {
-				samsung,spi-feedback-delay = <0>;
-			};
-
-			partition@0 {
-				label = "U-Boot";
-				reg = <0x0 0x40000>;
-				read-only;
-			};
-
-			partition@40000 {
-				label = "Kernel";
-				reg = <0x40000 0xc0000>;
-			};
-		};
-	};
diff --git a/MAINTAINERS b/MAINTAINERS
index af392bd04874..572eb97f1855 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -17058,7 +17058,7 @@  M:	Andi Shyti <andi@etezian.org>
 L:	linux-spi@vger.kernel.org
 L:	linux-samsung-soc@vger.kernel.org
 S:	Maintained
-F:	Documentation/devicetree/bindings/spi/spi-samsung.txt
+F:	Documentation/devicetree/bindings/spi/samsung,spi.yaml
 F:	drivers/spi/spi-s3c*
 F:	include/linux/platform_data/spi-s3c64xx.h
 F:	include/linux/spi/s3c24xx-fiq.h