This is a note to let you know that I've just added the patch titled
dt-bindings: sc16is7xx: Add property to change GPIO function
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dt-bindings-sc16is7xx-add-property-to-change-gpio-function.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4cf478dc5d707e56aefa258c049872eff054a353 Mon Sep 17 00:00:00 2001
From: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx>
Date: Mon, 7 Aug 2023 17:45:53 -0400
Subject: dt-bindings: sc16is7xx: Add property to change GPIO function
From: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx>
commit 4cf478dc5d707e56aefa258c049872eff054a353 upstream.
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@xxxxxxxxxxxxxxx # 6.1.x
Signed-off-by: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx>
Acked-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
Reviewed-by: Lech Perczak <lech.perczak@xxxxxxxxxxxxxxx>
Acked-by: Rob Herring <robh@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230807214556.540627-4-hugo@xxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
Documentation/devicetree/bindings/serial/nxp,sc16is7xx.txt | 46 +++++++++++++
1 file changed, 46 insertions(+)
--- 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 +38,26 @@ 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 */
+ };
Patches currently in stable-queue which might be from hvilleneuve@xxxxxxxxxxxx are
queue-6.4/serial-sc16is7xx-fix-broken-port-0-uart-init.patch
queue-6.4/serial-sc16is7xx-fix-bug-when-first-setting-gpio-direction.patch
queue-6.4/dt-bindings-sc16is7xx-add-property-to-change-gpio-function.patch
