[PATCH 5.15 065/132] ARM: dts: aspeed: Add ADC for AST2600 and enable for Rainier and Everest

Greg Kroah-Hartman
2022-05-23T17:55:16Z

From: Eddie James <eajames@linux.ibm.com>

[ Upstream commit eaad40466bd715c4b342ac9f7c889f5281714feb ]

Add the ADC nodes to the AST2600 devicetree. Enable ADC1 for Rainier and
Everest systems and add an iio-hwmon node for the 7th channel to report
the battery voltage.

Tested on Rainier:
~# cat /sys/class/hwmon/hwmon11/in1_input
1347

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/20210916210045.31769-1-eajames@linux.ibm.com
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts | 15 +++++++++++++++
arch/arm/boot/dts/aspeed-bmc-ibm-rainier.dts | 15 +++++++++++++++
arch/arm/boot/dts/aspeed-g6.dtsi | 20 ++++++++++++++++++++
3 files changed, 50 insertions(+)

diff --git a/arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts b/arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts
index 2efd70666738..af7ea7cab8cf 100644
--- a/arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts
+++ b/arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts
@@ -231,6 +231,21 @@ led-pcieslot-power {
gpios = <&gpio0 ASPEED_GPIO(P, 4) GPIO_ACTIVE_LOW>;
};
};
+
+ iio-hwmon {
+ compatible = "iio-hwmon";
+ io-channels = <&adc1 7>;
+ };
+};
+
+&adc1 {
+ status = "okay";
+ aspeed,int-vref-microvolt = <2500000>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_adc8_default &pinctrl_adc9_default
+ &pinctrl_adc10_default &pinctrl_adc11_default
+ &pinctrl_adc12_default &pinctrl_adc13_default
+ &pinctrl_adc14_default &pinctrl_adc15_default>;
};

&gpio0 {
diff --git a/arch/arm/boot/dts/aspeed-bmc-ibm-rainier.dts b/arch/arm/boot/dts/aspeed-bmc-ibm-rainier.dts
index 6419c9762c0b..6c9f34396a3a 100644
--- a/arch/arm/boot/dts/aspeed-bmc-ibm-rainier.dts
+++ b/arch/arm/boot/dts/aspeed-bmc-ibm-rainier.dts
@@ -246,6 +246,21 @@ fan5-presence {
linux,code = <11>;
};
};
+
+ iio-hwmon {
+ compatible = "iio-hwmon";
+ io-channels = <&adc1 7>;
+ };
+};
+
+&adc1 {
+ status = "okay";
+ aspeed,int-vref-microvolt = <2500000>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_adc8_default &pinctrl_adc9_default
+ &pinctrl_adc10_default &pinctrl_adc11_default
+ &pinctrl_adc12_default &pinctrl_adc13_default
+ &pinctrl_adc14_default &pinctrl_adc15_default>;
};

&ehci1 {
diff --git a/arch/arm/boot/dts/aspeed-g6.dtsi b/arch/arm/boot/dts/aspeed-g6.dtsi
index 1b47be1704f8..ee171b3364fa 100644
--- a/arch/arm/boot/dts/aspeed-g6.dtsi
+++ b/arch/arm/boot/dts/aspeed-g6.dtsi
@@ -364,6 +364,26 @@ xdma: xdma@1e6e7000 {
status = "disabled";
};

+ adc0: adc@1e6e9000 {
+ compatible = "aspeed,ast2600-adc0";
+ reg = <0x1e6e9000 0x100>;
+ clocks = <&syscon ASPEED_CLK_APB2>;
+ resets = <&syscon ASPEED_RESET_ADC>;
+ interrupts = <GIC_SPI 46 IRQ_TYPE_LEVEL_HIGH>;
+ #io-channel-cells = <1>;
+ status = "disabled";
+ };
+
+ adc1: adc@1e6e9100 {
+ compatible = "aspeed,ast2600-adc1";
+ reg = <0x1e6e9100 0x100>;
+ clocks = <&syscon ASPEED_CLK_APB2>;
+ resets = <&syscon ASPEED_RESET_ADC>;
+ interrupts = <GIC_SPI 46 IRQ_TYPE_LEVEL_HIGH>;
+ #io-channel-cells = <1>;
+ status = "disabled";
+ };
+
gpio0: gpio@1e780000 {
#gpio-cells = <2>;
gpio-controller;
--
2.35.1