From eaad40466bd715c4b342ac9f7c889f5281714feb Mon Sep 17 00:00:00 2001 From: Eddie James Date: Thu, 16 Sep 2021 16:00:45 -0500 Subject: [PATCH] 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 Link: https://lore.kernel.org/r/20210916210045.31769-1-eajames@linux.ibm.com Signed-off-by: Joel Stanley --- 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 3fb1f90..53afbcd 100644 --- a/arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts +++ b/arch/arm/boot/dts/aspeed-bmc-ibm-everest.dts @@ -243,6 +243,21 @@ 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 46f077b..fca5116 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 @@ 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 1b47be1..ee171b3 100644 --- a/arch/arm/boot/dts/aspeed-g6.dtsi +++ b/arch/arm/boot/dts/aspeed-g6.dtsi @@ -364,6 +364,26 @@ status = "disabled"; }; + adc0: adc@1e6e9000 { + compatible = "aspeed,ast2600-adc0"; + reg = <0x1e6e9000 0x100>; + clocks = <&syscon ASPEED_CLK_APB2>; + resets = <&syscon ASPEED_RESET_ADC>; + interrupts = ; + #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 = ; + #io-channel-cells = <1>; + status = "disabled"; + }; + gpio0: gpio@1e780000 { #gpio-cells = <2>; gpio-controller; -- 2.7.4