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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>
This commit is contained in:
Hugo Villeneuve 2023-08-07 17:45:53 -04:00 committed by Greg Kroah-Hartman
parent dabc54a457
commit 4cf478dc5d
1 changed files with 46 additions and 0 deletions
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46
Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt
View File

@ -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 +38,26 @@ Example:
#gpio-cells = <2>;
};
sc16is752: sc16is752@53 {
compatible = "nxp,sc16is752";
reg = <0x53>;
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>;
};
sc16is752: sc16is752@54 {
compatible = "nxp,sc16is752";
reg = <0x54>;
clocks = <&clk20m>;
interrupt-parent = <&gpio3>;
interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
nxp,modem-control-line-ports = <0 1>; /* Ports 0 and 1 as modem control lines */
};
* spi as bus
Required properties:
@ -59,6 +82,9 @@ 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 +96,23 @@ Example:
gpio-controller;
#gpio-cells = <2>;
};
sc16is752: sc16is752@1 {
compatible = "nxp,sc16is752";
reg = <1>;
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>;
};
sc16is752: sc16is752@2 {
compatible = "nxp,sc16is752";
reg = <2>;
clocks = <&clk20m>;
interrupt-parent = <&gpio3>;
interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
nxp,modem-control-line-ports = <0 1>; /* Ports 0 and 1 as modem control lines */
};