1*2bdb2f00SBilly Tsai# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) 2*2bdb2f00SBilly Tsai%YAML 1.2 3*2bdb2f00SBilly Tsai--- 4*2bdb2f00SBilly Tsai$id: http://devicetree.org/schemas/iio/adc/aspeed,ast2600-adc.yaml# 5*2bdb2f00SBilly Tsai$schema: http://devicetree.org/meta-schemas/core.yaml# 6*2bdb2f00SBilly Tsai 7*2bdb2f00SBilly Tsaititle: ADC that forms part of an ASPEED server management processor. 8*2bdb2f00SBilly Tsai 9*2bdb2f00SBilly Tsaimaintainers: 10*2bdb2f00SBilly Tsai - Billy Tsai <billy_tsai@aspeedtech.com> 11*2bdb2f00SBilly Tsai 12*2bdb2f00SBilly Tsaidescription: | 13*2bdb2f00SBilly Tsai • 10-bits resolution for 16 voltage channels. 14*2bdb2f00SBilly Tsai • The device split into two individual engine and each contains 8 voltage 15*2bdb2f00SBilly Tsai channels. 16*2bdb2f00SBilly Tsai • Channel scanning can be non-continuous. 17*2bdb2f00SBilly Tsai • Programmable ADC clock frequency. 18*2bdb2f00SBilly Tsai • Programmable upper and lower threshold for each channels. 19*2bdb2f00SBilly Tsai • Interrupt when larger or less than threshold for each channels. 20*2bdb2f00SBilly Tsai • Support hysteresis for each channels. 21*2bdb2f00SBilly Tsai • Built-in a compensating method. 22*2bdb2f00SBilly Tsai • Built-in a register to trim internal reference voltage. 23*2bdb2f00SBilly Tsai • Internal or External reference voltage. 24*2bdb2f00SBilly Tsai • Support 2 Internal reference voltage 1.2v or 2.5v. 25*2bdb2f00SBilly Tsai • Integrate dividing circuit for battery sensing. 26*2bdb2f00SBilly Tsai 27*2bdb2f00SBilly Tsaiproperties: 28*2bdb2f00SBilly Tsai compatible: 29*2bdb2f00SBilly Tsai enum: 30*2bdb2f00SBilly Tsai - aspeed,ast2600-adc0 31*2bdb2f00SBilly Tsai - aspeed,ast2600-adc1 32*2bdb2f00SBilly Tsai description: 33*2bdb2f00SBilly Tsai Their trimming data, which is used to calibrate internal reference volage, 34*2bdb2f00SBilly Tsai locates in different address of OTP. 35*2bdb2f00SBilly Tsai 36*2bdb2f00SBilly Tsai reg: 37*2bdb2f00SBilly Tsai maxItems: 1 38*2bdb2f00SBilly Tsai 39*2bdb2f00SBilly Tsai clocks: 40*2bdb2f00SBilly Tsai maxItems: 1 41*2bdb2f00SBilly Tsai description: 42*2bdb2f00SBilly Tsai Input clock used to derive the sample clock. Expected to be the 43*2bdb2f00SBilly Tsai SoC's APB clock. 44*2bdb2f00SBilly Tsai 45*2bdb2f00SBilly Tsai resets: 46*2bdb2f00SBilly Tsai maxItems: 1 47*2bdb2f00SBilly Tsai 48*2bdb2f00SBilly Tsai "#io-channel-cells": 49*2bdb2f00SBilly Tsai const: 1 50*2bdb2f00SBilly Tsai 51*2bdb2f00SBilly Tsai vref-supply: 52*2bdb2f00SBilly Tsai description: 53*2bdb2f00SBilly Tsai The external regulator supply ADC reference voltage. 54*2bdb2f00SBilly Tsai 55*2bdb2f00SBilly Tsai aspeed,int-vref-microvolt: 56*2bdb2f00SBilly Tsai enum: [1200000, 2500000] 57*2bdb2f00SBilly Tsai description: 58*2bdb2f00SBilly Tsai ADC internal reference voltage in microvolts. 59*2bdb2f00SBilly Tsai 60*2bdb2f00SBilly Tsai aspeed,battery-sensing: 61*2bdb2f00SBilly Tsai type: boolean 62*2bdb2f00SBilly Tsai description: 63*2bdb2f00SBilly Tsai Inform the driver that last channel will be used to sensor battery. 64*2bdb2f00SBilly Tsai 65*2bdb2f00SBilly Tsairequired: 66*2bdb2f00SBilly Tsai - compatible 67*2bdb2f00SBilly Tsai - reg 68*2bdb2f00SBilly Tsai - clocks 69*2bdb2f00SBilly Tsai - resets 70*2bdb2f00SBilly Tsai - "#io-channel-cells" 71*2bdb2f00SBilly Tsai 72*2bdb2f00SBilly TsaiadditionalProperties: false 73*2bdb2f00SBilly Tsai 74*2bdb2f00SBilly Tsaiexamples: 75*2bdb2f00SBilly Tsai - | 76*2bdb2f00SBilly Tsai #include <dt-bindings/clock/ast2600-clock.h> 77*2bdb2f00SBilly Tsai adc0: adc@1e6e9000 { 78*2bdb2f00SBilly Tsai compatible = "aspeed,ast2600-adc0"; 79*2bdb2f00SBilly Tsai reg = <0x1e6e9000 0x100>; 80*2bdb2f00SBilly Tsai clocks = <&syscon ASPEED_CLK_APB2>; 81*2bdb2f00SBilly Tsai resets = <&syscon ASPEED_RESET_ADC>; 82*2bdb2f00SBilly Tsai #io-channel-cells = <1>; 83*2bdb2f00SBilly Tsai aspeed,int-vref-microvolt = <2500000>; 84*2bdb2f00SBilly Tsai }; 85*2bdb2f00SBilly Tsai adc1: adc@1e6e9100 { 86*2bdb2f00SBilly Tsai compatible = "aspeed,ast2600-adc1"; 87*2bdb2f00SBilly Tsai reg = <0x1e6e9100 0x100>; 88*2bdb2f00SBilly Tsai clocks = <&syscon ASPEED_CLK_APB2>; 89*2bdb2f00SBilly Tsai resets = <&syscon ASPEED_RESET_ADC>; 90*2bdb2f00SBilly Tsai #io-channel-cells = <1>; 91*2bdb2f00SBilly Tsai aspeed,int-vref-microvolt = <2500000>; 92*2bdb2f00SBilly Tsai }; 93*2bdb2f00SBilly Tsai... 94