netdev - Re: [PATCH v12 3/5] dt-bindings: can: tcan4x5x: Add DT bindings for TCAN4x5X driver

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Date:   Fri, 16 Aug 2019 11:38:30 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     Dan Murphy <dmurphy@...com>, wg@...ndegger.com, davem@...emloft.net
Cc:     linux-can@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v12 3/5] dt-bindings: can: tcan4x5x: Add DT bindings for
 TCAN4x5X driver

On 5/9/19 6:11 PM, Dan Murphy wrote:
> DT binding documentation for TI TCAN4x5x driver.
> 
> Signed-off-by: Dan Murphy <dmurphy@...com>
> ---
> 
> v12 - No changes - https://lore.kernel.org/patchwork/patch/1052300/
> 
> v11 - No changes - https://lore.kernel.org/patchwork/patch/1051178/
> v10 - No changes - https://lore.kernel.org/patchwork/patch/1050488/
> v9 - No Changes - https://lore.kernel.org/patchwork/patch/1050118/
> v8 - No Changes - https://lore.kernel.org/patchwork/patch/1047981/
> v7 - Made device state optional - https://lore.kernel.org/patchwork/patch/1047218/
> v6 - No changes - https://lore.kernel.org/patchwork/patch/1042445/
> 
>  .../devicetree/bindings/net/can/tcan4x5x.txt  | 37 +++++++++++++++++++
>  1 file changed, 37 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/can/tcan4x5x.txt
> 
> diff --git a/Documentation/devicetree/bindings/net/can/tcan4x5x.txt b/Documentation/devicetree/bindings/net/can/tcan4x5x.txt
> new file mode 100644
> index 000000000000..c388f7d9feb1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/can/tcan4x5x.txt
> @@ -0,0 +1,37 @@
> +Texas Instruments TCAN4x5x CAN Controller
> +================================================
> +
> +This file provides device node information for the TCAN4x5x interface contains.
> +
> +Required properties:
> +	- compatible: "ti,tcan4x5x"
> +	- reg: 0
> +	- #address-cells: 1
> +	- #size-cells: 0
> +	- spi-max-frequency: Maximum frequency of the SPI bus the chip can
> +			     operate at should be less than or equal to 18 MHz.
> +	- data-ready-gpios: Interrupt GPIO for data and error reporting.
> +	- device-wake-gpios: Wake up GPIO to wake up the TCAN device.
> +
> +See Documentation/devicetree/bindings/net/can/m_can.txt for additional
> +required property details.
> +
> +Optional properties:
> +	- reset-gpios: Hardwired output GPIO. If not defined then software
> +		       reset.
> +	- device-state-gpios: Input GPIO that indicates if the device is in
> +			      a sleep state or if the device is active.
> +
> +Example:
> +tcan4x5x: tcan4x5x@0 {
> +		compatible = "ti,tcan4x5x";
> +		reg = <0>;
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		spi-max-frequency = <10000000>;
> +		bosch,mram-cfg = <0x0 0 0 32 0 0 1 1>;
> +		data-ready-gpios = <&gpio1 14 GPIO_ACTIVE_LOW>;

Can you convert this into a proper interrupt property? E.g.:

>                 interrupt-parent = <&gpio4>;
>                 interrupts = <13 0x2>;

See:
https://elixir.bootlin.com/linux/latest/source/Documentation/devicetree/bindings/net/can/microchip,mcp251x.txt#L21
https://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next.git/tree/drivers/net/can/spi/mcp251x.c?h=mcp251x#n945

> +		device-state-gpios = <&gpio3 21 GPIO_ACTIVE_HIGH>;
> +		device-wake-gpios = <&gpio1 15 GPIO_ACTIVE_HIGH>;
> +		reset-gpios = <&gpio1 27 GPIO_ACTIVE_LOW>;
> +};

Marc

-- 
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