]> git.hungrycats.org Git - linux/commitdiff
dt-bindings: sc16is7xx: Add property to change GPIO function
authorHugo Villeneuve <hvilleneuve@dimonoff.com>
Mon, 7 Aug 2023 21:45:53 +0000 (17:45 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 22 Aug 2023 13:30:00 +0000 (15:30 +0200)
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>
Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt

index 0fa8e3e43bf80c3a81d41b488c15744368c3c45b..1a7e4bff0456f3fe2d7990e6b6039373e208589e 100644 (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 */
+       };