[RFC] dts: arm: renesas: koelsh: Add MAX11100 device

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Add node to test MAX11100 ADC with LED28 connected to the chip input
line.
The ADC sits on a gpio-spi master.

Signed-off-by: Jacopo Mondi <jacopo@xxxxxxxxxx>
---

Sending as RFC only, not for inclusion.
Used to test MAX11100 ADC driver currently connected to Koelsch GPIO
expander.
Adding LED28 as ADC input line.

---
 arch/arm/boot/dts/r8a7791-koelsch.dts | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/arch/arm/boot/dts/r8a7791-koelsch.dts b/arch/arm/boot/dts/r8a7791-koelsch.dts
index 5405d33..ac8f10d 100644
--- a/arch/arm/boot/dts/r8a7791-koelsch.dts
+++ b/arch/arm/boot/dts/r8a7791-koelsch.dts
@@ -170,6 +170,27 @@
 			gpios = <&gpio2 21 GPIO_ACTIVE_HIGH>;
 			label = "LED8";
 		};
+		led28 {
+			gpios = <&gpio5 28 GPIO_ACTIVE_HIGH>;
+			label = "LED28";
+		};
+	};
+
+	spi_gpio: spi-gpio {
+		compatible = "spi-gpio";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		gpio-sck = <&gpio5 27 GPIO_ACTIVE_HIGH>;
+		gpio-miso = <&gpio5 25 GPIO_ACTIVE_HIGH>;
+		num-chipselects = <1>;
+		cs-gpios = <&gpio5 26 GPIO_ACTIVE_LOW>;
+		status = "okay";
+
+		spi@0 {
+			compatible = "maxim,max11100";
+			reg = <0>;
+			spi-max-frequency = <2500000>;
+		};
 	};
 
 	vcc_sdhi0: regulator-vcc-sdhi0 {
-- 
2.7.4




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