linux-kernel - [PATCH 2/2] ARC: [plat-hsdk]: Enable on-boardi SPI ADC IC

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Message-Id: <20191018111126.5246-3-Eugeniy.Paltsev@synopsys.com>
Date:   Fri, 18 Oct 2019 14:11:26 +0300
From:   Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>
To:     linux-snps-arc@...ts.infradead.org,
        Vineet Gupta <Vineet.Gupta1@...opsys.com>
Cc:     linux-kernel@...r.kernel.org,
        Alexey Brodkin <Alexey.Brodkin@...opsys.com>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>
Subject: [PATCH 2/2] ARC: [plat-hsdk]: Enable on-boardi SPI ADC IC

HSDK board has adc108s102 SPI ADC IC installed, enable it.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>
---
 arch/arc/boot/dts/hsdk.dts      | 15 +++++++++++++++
 arch/arc/configs/hsdk_defconfig |  4 ++++
 2 files changed, 19 insertions(+)

diff --git a/arch/arc/boot/dts/hsdk.dts b/arch/arc/boot/dts/hsdk.dts
index 9bea5daadd23..9acbeba832c0 100644
--- a/arch/arc/boot/dts/hsdk.dts
+++ b/arch/arc/boot/dts/hsdk.dts
@@ -65,6 +65,14 @@
 		clock-frequency = <33333333>;
 	};
 
+	reg_5v0: regulator-5v0 {
+		compatible = "regulator-fixed";
+
+		regulator-name = "5v0-supply";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+	};
+
 	cpu_intc: cpu-interrupt-controller {
 		compatible = "snps,archs-intc";
 		interrupt-controller;
@@ -272,6 +280,13 @@
 				#size-cells = <1>;
 				spi-max-frequency = <4000000>;
 			};
+
+			adc@1 {
+				compatible = "ti,adc108s102";
+				reg = <1>;
+				vref-supply = <&reg_5v0>;
+				spi-max-frequency = <1000000>;
+			};
 		};
 
 		creg_gpio: gpio@...0 {
diff --git a/arch/arc/configs/hsdk_defconfig b/arch/arc/configs/hsdk_defconfig
index 22fc70396a3b..0974226fab55 100644
--- a/arch/arc/configs/hsdk_defconfig
+++ b/arch/arc/configs/hsdk_defconfig
@@ -57,6 +57,8 @@ CONFIG_GPIO_SYSFS=y
 CONFIG_GPIO_DWAPB=y
 CONFIG_GPIO_SNPS_CREG=y
 # CONFIG_HWMON is not set
+CONFIG_REGULATOR=y
+CONFIG_REGULATOR_FIXED_VOLTAGE=y
 CONFIG_DRM=y
 # CONFIG_DRM_FBDEV_EMULATION is not set
 CONFIG_DRM_UDL=y
@@ -74,6 +76,8 @@ CONFIG_MMC_SDHCI_PLTFM=y
 CONFIG_MMC_DW=y
 CONFIG_DMADEVICES=y
 CONFIG_DW_AXI_DMAC=y
+CONFIG_IIO=y
+CONFIG_TI_ADC108S102=y
 CONFIG_EXT3_FS=y
 CONFIG_VFAT_FS=y
 CONFIG_TMPFS=y
-- 
2.21.0