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dt-bindings: sc16is7xx: Add property to change GPIO function
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. Cc: stable@vger.kernel.org # 6.1.x Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com> Acked-by: Conor Dooley <conor.dooley@microchip.com> Reviewed-by: Lech Perczak <lech.perczak@camlingroup.com> Acked-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230807214556.540627-4-hugo@hugovil.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -23,6 +23,9 @@ Optional properties:
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1 = active low.
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- irda-mode-ports: An array that lists the indices of the port that
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should operate in IrDA mode.
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- nxp,modem-control-line-ports: An array that lists the indices of the port that
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should have shared GPIO lines configured as
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modem control lines.
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Example:
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sc16is750: sc16is750@51 {
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@ -35,6 +38,26 @@ Example:
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#gpio-cells = <2>;
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};
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sc16is752: sc16is752@53 {
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compatible = "nxp,sc16is752";
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reg = <0x53>;
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clocks = <&clk20m>;
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interrupt-parent = <&gpio3>;
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interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
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nxp,modem-control-line-ports = <1>; /* Port 1 as modem control lines */
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gpio-controller; /* Port 0 as GPIOs */
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#gpio-cells = <2>;
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};
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sc16is752: sc16is752@54 {
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compatible = "nxp,sc16is752";
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reg = <0x54>;
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clocks = <&clk20m>;
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interrupt-parent = <&gpio3>;
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interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
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nxp,modem-control-line-ports = <0 1>; /* Ports 0 and 1 as modem control lines */
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};
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* spi as bus
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Required properties:
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@ -59,6 +82,9 @@ Optional properties:
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1 = active low.
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- irda-mode-ports: An array that lists the indices of the port that
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should operate in IrDA mode.
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- nxp,modem-control-line-ports: An array that lists the indices of the port that
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should have shared GPIO lines configured as
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modem control lines.
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Example:
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sc16is750: sc16is750@0 {
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@ -70,3 +96,23 @@ Example:
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gpio-controller;
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#gpio-cells = <2>;
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};
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sc16is752: sc16is752@1 {
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compatible = "nxp,sc16is752";
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reg = <1>;
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clocks = <&clk20m>;
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interrupt-parent = <&gpio3>;
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interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
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nxp,modem-control-line-ports = <1>; /* Port 1 as modem control lines */
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gpio-controller; /* Port 0 as GPIOs */
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#gpio-cells = <2>;
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};
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sc16is752: sc16is752@2 {
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compatible = "nxp,sc16is752";
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reg = <2>;
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clocks = <&clk20m>;
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interrupt-parent = <&gpio3>;
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interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
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nxp,modem-control-line-ports = <0 1>; /* Ports 0 and 1 as modem control lines */
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};
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