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Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0420-dts-Add-overlay-for-NXP-SC16IS752-Dual-UART-with-SPI.patch')
-rw-r--r--target/linux/brcm2708/patches-4.4/0420-dts-Add-overlay-for-NXP-SC16IS752-Dual-UART-with-SPI.patch106
1 files changed, 106 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0420-dts-Add-overlay-for-NXP-SC16IS752-Dual-UART-with-SPI.patch b/target/linux/brcm2708/patches-4.4/0420-dts-Add-overlay-for-NXP-SC16IS752-Dual-UART-with-SPI.patch
new file mode 100644
index 0000000000..595c0ee4e6
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0420-dts-Add-overlay-for-NXP-SC16IS752-Dual-UART-with-SPI.patch
@@ -0,0 +1,106 @@
+From 27fac2f6623e8a3cddeaaf9851b719469b8df22e Mon Sep 17 00:00:00 2001
+From: Erdem MEYDANLI <erdem.meydanli@punica.com.tr>
+Date: Thu, 30 Jun 2016 21:05:08 +0300
+Subject: [PATCH 420/423] dts: Add overlay for NXP SC16IS752 Dual UART with SPI
+ Interface
+
+---
+ arch/arm/boot/dts/overlays/Makefile | 1 +
+ arch/arm/boot/dts/overlays/README | 10 ++++
+ .../boot/dts/overlays/sc16is752-spi1-overlay.dts | 61 ++++++++++++++++++++++
+ 3 files changed, 72 insertions(+)
+ create mode 100644 arch/arm/boot/dts/overlays/sc16is752-spi1-overlay.dts
+
+--- a/arch/arm/boot/dts/overlays/Makefile
++++ b/arch/arm/boot/dts/overlays/Makefile
+@@ -71,6 +71,7 @@ dtbo-$(RPI_DT_OVERLAYS) += rpi-ft5406.dt
+ dtbo-$(RPI_DT_OVERLAYS) += rpi-proto.dtbo
+ dtbo-$(RPI_DT_OVERLAYS) += rpi-sense.dtbo
+ dtbo-$(RPI_DT_OVERLAYS) += rra-digidac1-wm8741-audio.dtbo
++dtbo-$(RPI_DT_OVERLAYS) += sc16is752-spi1.dtbo
+ dtbo-$(RPI_DT_OVERLAYS) += sdhost.dtbo
+ dtbo-$(RPI_DT_OVERLAYS) += sdio.dtbo
+ dtbo-$(RPI_DT_OVERLAYS) += sdio-1bit.dtbo
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -888,6 +888,16 @@ Load: dtoverlay=rra-digidac1-wm8741-au
+ Params: <None>
+
+
++Name: sc16is752-spi1
++Info: Overlay for the NXP SC16IS752 Dual UART with SPI Interface
++ Enables the chip on SPI1.
++ N.B.: spi1 is only accessible on devices with a 40pin header, eg:
++ A+, B+, Zero and PI2 B; as well as the Compute Module.
++
++Load: dtoverlay=sc16is752-spi1,<param>=<val>
++Params: int_pin GPIO used for IRQ (default 24)
++
++
+ Name: sdhost
+ Info: Selects the bcm2835-sdhost SD/MMC driver, optionally with overclock.
+ N.B. This overlay is designed for situations where the mmc driver is
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/sc16is752-spi1-overlay.dts
+@@ -0,0 +1,61 @@
++/dts-v1/;
++/plugin/;
++
++/ {
++ compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
++
++ fragment@0 {
++ target = <&gpio>;
++ __overlay__ {
++ spi1_pins: spi1_pins {
++ brcm,pins = <19 20 21>;
++ brcm,function = <3>; /* alt4 */
++ };
++
++ spi1_cs_pins: spi1_cs_pins {
++ brcm,pins = <18>;
++ brcm,function = <1>; /* output */
++ };
++ };
++ };
++
++ fragment@1 {
++ target = <&spi1>;
++ frag1: __overlay__ {
++ #address-cells = <1>;
++ #size-cells = <0>;
++ pinctrl-names = "default";
++ pinctrl-0 = <&spi1_pins &spi1_cs_pins>;
++ cs-gpios = <&gpio 18 1>;
++ status = "okay";
++
++ sc16is752: sc16is752@0 {
++ compatible = "nxp,sc16is752";
++ reg = <0>; /* CE0 */
++ clocks = <&sc16is752_clk>;
++ interrupt-parent = <&gpio>;
++ interrupts = <24 2>; /* IRQ_TYPE_EDGE_FALLING */
++ #gpio-controller;
++ #gpio-cells = <2>;
++ spi-max-frequency = <4000000>;
++
++ sc16is752_clk: sc16is752_clk {
++ compatible = "fixed-clock";
++ #clock-cells = <0>;
++ clock-frequency = <14745600>;
++ };
++ };
++ };
++ };
++
++ fragment@2 {
++ target = <&aux>;
++ __overlay__ {
++ status = "okay";
++ };
++ };
++
++ __overrides__ {
++ int_pin = <&sc16is752>,"interrupts:0";
++ };
++};