On Wed, Jul 06, 2022 at 09:06:18AM -0200, Kavyasree Kotagiri wrote:
> LAN966x SoC flexcoms has two optional I/O lines. Namely, CS0 and CS1
> in flexcom SPI mode. CTS and RTS in flexcom USART mode. These pins
> can be mapped to lan966x FLEXCOM_SHARED[0-20] pins and usage depends on
> functions being configured.
>
> Signed-off-by: Kavyasree Kotagiri <kavyasree.kotagiri@xxxxxxxxxxxxx>
> ---
> v6 -> v7:
> - Add #address-cells, #size-cells to flx3 example.
>
> v5 -> v6:
> - Removed spi node from flx3 example.
>
> v4 -> v5:
> - Fixed indentations and dt-schema errors.
> - No errors seen with 'make dt_binding_check'.
>
> v3 -> v4:
> - Added else condition to allOf:if:then.
>
> v2 -> v3:
> - Add reg property of lan966x missed in v2.
>
> v1 -> v2:
> - Use allOf:if:then for lan966x dt properties
>
> .../bindings/mfd/atmel,sama5d2-flexcom.yaml | 65 ++++++++++++++++++-
> 1 file changed, 64 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/mfd/atmel,sama5d2-flexcom.yaml b/Documentation/devicetree/bindings/mfd/atmel,sama5d2-flexcom.yaml
> index 864f490ffb83..b4b47accab49 100644
> --- a/Documentation/devicetree/bindings/mfd/atmel,sama5d2-flexcom.yaml
> +++ b/Documentation/devicetree/bindings/mfd/atmel,sama5d2-flexcom.yaml
> @@ -18,9 +18,11 @@ properties:
> compatible:
> enum:
> - atmel,sama5d2-flexcom
> + - microchip,lan966x-flexcom
Don't use wildcards in compatible strings.
>
> reg:
> - maxItems: 1
> + minItems: 1
> + maxItems: 2
>
> clocks:
> maxItems: 1
> @@ -47,6 +49,27 @@ properties:
> $ref: /schemas/types.yaml#/definitions/uint32
> enum: [1, 2, 3]
>
> + microchip,flx-shrd-pins:
> + description: Specify the Flexcom shared pins to be used for flexcom
> + chip-selects.
> + $ref: /schemas/types.yaml#/definitions/uint32-array
> + minItems: 1
> + maxItems: 2
> + items:
> + minimum: 0
> + maximum: 20
It's not clear how one uses this. It's selecting 2 pins, or a range of
pins, or ???
> +
> + microchip,flx-cs:
> + description: Flexcom chip selects. Here, value of '0' represents "cts" line
> + of flexcom USART or "cs0" line of flexcom SPI and value of '1' represents
> + "rts" line of flexcom USART or "cs1" line of flexcom SPI.
> + $ref: /schemas/types.yaml#/definitions/uint32-array
> + minItems: 1
> + maxItems: 2
> + items:
> + minimum: 0
> + maximum: 1
> +
> required:
> - compatible
> - reg
> @@ -56,6 +79,31 @@ required:
> - ranges
> - atmel,flexcom-mode
>
> +allOf:
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: microchip,lan966x-flexcom
> +
> + then:
> + properties:
> + reg:
> + items:
> + - description: Flexcom base registers map
> + - description: Flexcom shared registers map
> + required:
> + - microchip,flx-shrd-pins
> + - microchip,flx-cs
> +
> + else:
> + properties:
> + reg:
> + items:
> + - description: Flexcom base registers map
> + microchip,flx-shrd-pins: false
> + microchip,flx-cs: false
> +
> additionalProperties: false
>
> examples:
> @@ -71,4 +119,19 @@ examples:
> ranges = <0x0 0xf8034000 0x800>;
> atmel,flexcom-mode = <2>;
> };
> + - |
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> + flx3: flexcom@e0064000 {
> + compatible = "microchip,lan966x-flexcom";
> + reg = <0xe0064000 0x100>,
> + <0xe2004180 0x8>;
> + clocks = <&flx0_clk>;
> + #address-cells = <1>;
> + #size-cells = <1>;
> + ranges = <0x0 0xe0040000 0x800>;
> + atmel,flexcom-mode = <2>;
> + microchip,flx-shrd-pins = <9>;
> + microchip,flx-cs = <0>;
> + };
> ...
> --
> 2.25.1
>
>
