diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.14/950-0159-overlays-Add-uart0-overlay-to-change-pin-usage.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.14/950-0159-overlays-Add-uart0-overlay-to-change-pin-usage.patch | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.14/950-0159-overlays-Add-uart0-overlay-to-change-pin-usage.patch b/target/linux/brcm2708/patches-4.14/950-0159-overlays-Add-uart0-overlay-to-change-pin-usage.patch new file mode 100644 index 0000000000..a2a30e9059 --- /dev/null +++ b/target/linux/brcm2708/patches-4.14/950-0159-overlays-Add-uart0-overlay-to-change-pin-usage.patch @@ -0,0 +1,81 @@ +From f0f4af3ddb0fc5ea529c0147ebf8be47b1a80335 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Fri, 12 Jan 2018 09:15:01 +0000 +Subject: [PATCH 159/454] overlays: Add uart0 overlay to change pin usage + +Signed-off-by: Phil Elwell <phil@raspberrypi.org> +--- + arch/arm/boot/dts/overlays/Makefile | 1 + + arch/arm/boot/dts/overlays/README | 13 +++++++- + arch/arm/boot/dts/overlays/uart0-overlay.dts | 32 ++++++++++++++++++++ + 3 files changed, 45 insertions(+), 1 deletion(-) + create mode 100755 arch/arm/boot/dts/overlays/uart0-overlay.dts + +--- a/arch/arm/boot/dts/overlays/Makefile ++++ b/arch/arm/boot/dts/overlays/Makefile +@@ -117,6 +117,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \ + spi2-2cs.dtbo \ + spi2-3cs.dtbo \ + tinylcd35.dtbo \ ++ uart0.dtbo \ + uart1.dtbo \ + vc4-fkms-v3d.dtbo \ + vc4-kms-v3d.dtbo \ +--- a/arch/arm/boot/dts/overlays/README ++++ b/arch/arm/boot/dts/overlays/README +@@ -1671,8 +1671,19 @@ Params: speed Display + dtoverlay=tinylcd35,touch,touchgpio=3 + + ++Name: uart0 ++Info: Change the pin usage of uart0 ++Load: dtoverlay=uart0,<param>=<val> ++Params: txd0_pin GPIO pin for TXD0 (14, 32 or 36 - default 14) ++ ++ rxd0_pin GPIO pin for RXD0 (15, 33 or 37 - default 15) ++ ++ pin_func Alternative pin function - 4(Alt0) for 14&15, ++ 7(Alt3) for 32&33, 6(Alt2) for 36&37 ++ ++ + Name: uart1 +-Info: Enable uart1 in place of uart0 ++Info: Change the pin usage of uart1 + Load: dtoverlay=uart1,<param>=<val> + Params: txd1_pin GPIO pin for TXD1 (14, 32 or 40 - default 14) + +--- /dev/null ++++ b/arch/arm/boot/dts/overlays/uart0-overlay.dts +@@ -0,0 +1,32 @@ ++/dts-v1/; ++/plugin/; ++ ++/{ ++ compatible = "brcm,bcm2708"; ++ ++ fragment@0 { ++ target = <&uart0>; ++ __overlay__ { ++ pinctrl-names = "default"; ++ pinctrl-0 = <&uart0_pins>; ++ status = "okay"; ++ }; ++ }; ++ ++ fragment@1 { ++ target = <&gpio>; ++ __overlay__ { ++ uart0_pins: uart0_pins { ++ brcm,pins = <14 15>; ++ brcm,function = <4>; /* alt0 */ ++ brcm,pull = <0 2>; ++ }; ++ }; ++ }; ++ ++ __overrides__ { ++ txd0_pin = <&uart0_pins>,"brcm,pins:0"; ++ rxd0_pin = <&uart0_pins>,"brcm,pins:4"; ++ pin_func = <&uart0_pins>,"brcm,function:0"; ++ }; ++}; |