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dts: Add overlay for NXP SC16IS752 Dual UART with SPI Interface

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This commit is contained in:
Erdem MEYDANLI
2016-06-30 21:05:08 +03:00
committed by popcornmix
parent 0bd2e50457
commit c98a31a38d
3 changed files with 72 additions and 0 deletions
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1
arch/arm/boot/dts/overlays/Makefile
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@@ -70,6 +70,7 @@ dtbo-$(RPI_DT_OVERLAYS) += rpi-ft5406.dtbo
dtbo-$(RPI_DT_OVERLAYS) += rpi-proto.dtbo dtbo-$(RPI_DT_OVERLAYS) += rpi-proto.dtbo
dtbo-$(RPI_DT_OVERLAYS) += rpi-sense.dtbo dtbo-$(RPI_DT_OVERLAYS) += rpi-sense.dtbo
dtbo-$(RPI_DT_OVERLAYS) += rra-digidac1-wm8741-audio.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) += sdhost.dtbo
dtbo-$(RPI_DT_OVERLAYS) += sdio.dtbo dtbo-$(RPI_DT_OVERLAYS) += sdio.dtbo
dtbo-$(RPI_DT_OVERLAYS) += sdio-1bit.dtbo dtbo-$(RPI_DT_OVERLAYS) += sdio-1bit.dtbo

10
arch/arm/boot/dts/overlays/README
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@@ -862,6 +862,16 @@ Load: dtoverlay=rra-digidac1-wm8741-audio
Params: <None> 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 Name: sdhost
Info: Selects the bcm2835-sdhost SD/MMC driver, optionally with overclock. Info: Selects the bcm2835-sdhost SD/MMC driver, optionally with overclock.
N.B. This overlay is designed for situations where the mmc driver is N.B. This overlay is designed for situations where the mmc driver is

61
arch/arm/boot/dts/overlays/sc16is752-spi1-overlay.dts Normal file
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@@ -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";
};
};