On Thu, May 18, 2023 at 09:29:06AM -0400, Hugo Villeneuve wrote:
> From: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx>
>
> Some variants in this series of uart controllers have GPIO pins that
> are shared between GPIO and modem control lines.
>
> The pin mux mode (GPIO or modem control lines) can be set for each
> ports (channels) supported by the variant.
>
> This adds a property to the device tree to set the GPIO pin mux to
> modem control lines on selected ports if needed.
>
> Signed-off-by: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx>
On the basis of similarity to existing properties due to my lack of
understanding of the hardware it'll have to be an Ack. Hopefully Greg &
Co. have more specific insight.
Acked-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
Thanks,
Conor.
> ---
> v1 -> v2: Add nxp vendor prefix
> Add git base-commit
>
> .../bindings/serial/nxp,sc16is7xx.txt | 28 +++++++++++++++++++
> 1 file changed, 28 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt b/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt
> index 0fa8e3e43bf8..23a81c83f012 100644
> --- a/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt
> +++ b/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt
> @@ -23,6 +23,9 @@ Optional properties:
> 1 = active low.
> - irda-mode-ports: An array that lists the indices of the port that
> should operate in IrDA mode.
> +- nxp,modem-control-line-ports: An array that lists the indices of the port that
> + should have shared GPIO lines configured as modem
> + control lines.
>
> Example:
> sc16is750: sc16is750@51 {
> @@ -35,6 +38,17 @@ Example:
> #gpio-cells = <2>;
> };
>
> + sc16is752: sc16is752@54 {
> + compatible = "nxp,sc16is752";
> + reg = <0x54>;
> + clocks = <&clk20m>;
> + interrupt-parent = <&gpio3>;
> + interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
> + nxp,modem-control-line-ports = <1>; /* Port 1 as modem control lines */
> + gpio-controller; /* Port 0 as GPIOs */
> + #gpio-cells = <2>;
> + };
> +
> * spi as bus
>
> Required properties:
> @@ -59,6 +73,9 @@ Optional properties:
> 1 = active low.
> - irda-mode-ports: An array that lists the indices of the port that
> should operate in IrDA mode.
> +- nxp,modem-control-line-ports: An array that lists the indices of the port that
> + should have shared GPIO lines configured as modem
> + control lines.
>
> Example:
> sc16is750: sc16is750@0 {
> @@ -70,3 +87,14 @@ Example:
> gpio-controller;
> #gpio-cells = <2>;
> };
> +
> + sc16is752: sc16is752@0 {
> + compatible = "nxp,sc16is752";
> + reg = <0>;
> + clocks = <&clk20m>;
> + interrupt-parent = <&gpio3>;
> + interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
> + nxp,modem-control-line-ports = <1>; /* Port 1 as modem control lines */
> + gpio-controller; /* Port 0 as GPIOs */
> + #gpio-cells = <2>;
> + };
>
> base-commit: 4d6d4c7f541d7027beed4fb86eb2c451bd8d6fff
> --
> 2.30.2
>
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