ARM: dts: aspeed: Add ADC for AST2600 and enable for Rainier and Everest

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 <[email protected]>

---
 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(+)

arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts +15 -0

index 91242983a7b2..4682c005440d 100644
@@ -243,6 +243,21 @@ 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 {

arch/arm/boot/dts/aspeed-bmc-ibm-rainier.dts +15 -0

index 665c61ab6710..3e8d34a8729e 100644
@@ -218,6 +218,21 @@ 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 {

arch/arm/boot/dts/aspeed-g6.dtsi +20 -1

index f96607b7b4e2..02e54fb13815 100644
@@ -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;
--

2.27.0