On Thu, 24 Jun 2021 19:29:38 +0100 Anand Ashok Dumbre <anand.ashok.dumbre@xxxxxxxxxx> wrote: > Xilinx AMS have several ADC channels that can be used for measurement of > different voltages and temperatures. Document the same in the bindings. > > Signed-off-by: Anand Ashok Dumbre <anand.ashok.dumbre@xxxxxxxxxx> Definitely some fiddly bits in here, but it looks fine to me. It's odd enough that I'll be relying on Rob taking a look though :) > --- > .../bindings/iio/adc/xlnx,zynqmp-ams.yaml | 228 ++++++++++++++++++ > 1 file changed, 228 insertions(+) > create mode 100644 Documentation/devicetree/bindings/iio/adc/xlnx,zynqmp-ams.yaml > > diff --git a/Documentation/devicetree/bindings/iio/adc/xlnx,zynqmp-ams.yaml b/Documentation/devicetree/bindings/iio/adc/xlnx,zynqmp-ams.yaml > new file mode 100644 > index 000000000000..a065ddd55d38 > --- /dev/null > +++ b/Documentation/devicetree/bindings/iio/adc/xlnx,zynqmp-ams.yaml > @@ -0,0 +1,228 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/iio/adc/xlnx,zynqmp-ams.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Xilinx Zynq Ultrascale AMS controller > + > +maintainers: > + - Anand Ashok Dumbre <anand.ashok.dumbre@xxxxxxxxxx> > + > +description: | > + The AMS (Analog Monitoring System) includes an ADC as well as on-chip sensors > + that can be used to sample external voltages and monitor on-die operating > + conditions, such as temperature and supply voltage levels. > + The AMS has two SYSMON blocks which are PL (Programmable Logic) SYSMON and > + PS (Processing System) SYSMON. > + All designs should have AMS registers, but PS and PL are optional. The > + AMS controller can work with only PS, only PL and both PS and PL > + configurations. Please specify registers according to your design. Devicetree > + should always have AMS module property. Providing PS & PL module is optional. > + > + AMS Channel Details > + ``````````````````` > + Sysmon Block |Channel| Details |Measurement > + |Number | |Type > + --------------------------------------------------------------------------------------------------------- > + AMS CTRL |0 |System PLLs voltage measurement, VCC_PSPLL. |Voltage > + |1 |Battery voltage measurement, VCC_PSBATT. |Voltage > + |2 |PL Internal voltage measurement, VCCINT. |Voltage > + |3 |Block RAM voltage measurement, VCCBRAM. |Voltage > + |4 |PL Aux voltage measurement, VCCAUX. |Voltage > + |5 |Voltage measurement for six DDR I/O PLLs, VCC_PSDDR_PLL. |Voltage > + |6 |VCC_PSINTFP_DDR voltage measurement. |Voltage > + --------------------------------------------------------------------------------------------------------- > + PS Sysmon |7 |LPD temperature measurement. |Temperature > + |8 |FPD temperature measurement (REMOTE). |Temperature > + |9 |VCC PS LPD voltage measurement (supply1). |Voltage > + |10 |VCC PS FPD voltage measurement (supply2). |Voltage > + |11 |PS Aux voltage reference (supply3). |Voltage > + |12 |DDR I/O VCC voltage measurement. |Voltage > + |13 |PS IO Bank 503 voltage measurement (supply5). |Voltage > + |14 |PS IO Bank 500 voltage measurement (supply6). |Voltage > + |15 |VCCO_PSIO1 voltage measurement. |Voltage > + |16 |VCCO_PSIO2 voltage measurement. |Voltage > + |17 |VCC_PS_GTR voltage measurement (VPS_MGTRAVCC). |Voltage > + |18 |VTT_PS_GTR voltage measurement (VPS_MGTRAVTT). |Voltage > + |19 |VCC_PSADC voltage measurement. |Voltage > + --------------------------------------------------------------------------------------------------------- > + PL Sysmon |20 |PL temperature measurement. |Temperature > + |21 |PL Internal voltage measurement, VCCINT. |Voltage > + |22 |PL Auxiliary voltage measurement, VCCAUX. |Voltage > + |23 |ADC Reference P+ voltage measurement. |Voltage > + |24 |ADC Reference N- voltage measurement. |Voltage > + |25 |PL Block RAM voltage measurement, VCCBRAM. |Voltage > + |26 |LPD Internal voltage measurement, VCC_PSINTLP (supply4). |Voltage > + |27 |FPD Internal voltage measurement, VCC_PSINTFP (supply5). |Voltage > + |28 |PS Auxiliary voltage measurement (supply6). |Voltage > + |29 |PL VCCADC voltage measurement (vccams). |Voltage > + |30 |Differential analog input signal voltage measurment. |Voltage > + |31 |VUser0 voltage measurement (supply7). |Voltage > + |32 |VUser1 voltage measurement (supply8). |Voltage > + |33 |VUser2 voltage measurement (supply9). |Voltage > + |34 |VUser3 voltage measurement (supply10). |Voltage > + |35 |Auxiliary ch 0 voltage measurement (VAux0). |Voltage > + |36 |Auxiliary ch 1 voltage measurement (VAux1). |Voltage > + |37 |Auxiliary ch 2 voltage measurement (VAux2). |Voltage > + |38 |Auxiliary ch 3 voltage measurement (VAux3). |Voltage > + |39 |Auxiliary ch 4 voltage measurement (VAux4). |Voltage > + |40 |Auxiliary ch 5 voltage measurement (VAux5). |Voltage > + |41 |Auxiliary ch 6 voltage measurement (VAux6). |Voltage > + |42 |Auxiliary ch 7 voltage measurement (VAux7). |Voltage > + |43 |Auxiliary ch 8 voltage measurement (VAux8). |Voltage > + |44 |Auxiliary ch 9 voltage measurement (VAux9). |Voltage > + |45 |Auxiliary ch 10 voltage measurement (VAux10). |Voltage > + |46 |Auxiliary ch 11 voltage measurement (VAux11). |Voltage > + |47 |Auxiliary ch 12 voltage measurement (VAux12). |Voltage > + |48 |Auxiliary ch 13 voltage measurement (VAux13). |Voltage > + |49 |Auxiliary ch 14 voltage measurement (VAux14). |Voltage > + |50 |Auxiliary ch 15 voltage measurement (VAux15). |Voltage > + -------------------------------------------------------------------------------------------------------- > + > +properties: > + compatible: > + enum: > + - xlnx,zynqmp-ams > + > + interrupts: > + maxItems: 1 > + > + reg: > + description: AMS Controller register space > + maxItems: 1 > + > + ranges: > + description: > + Maps the child address space for PS and/or PL. > + maxItems: 1 > + > + '#address-cells': > + const: 1 > + > + '#size-cells': > + const: 1 > + > + '#io-channel-cells': > + const: 1 > + > +patternProperties: > + "^ams-ps@0,400$": > + type: object > + description: | > + PS (Processing System) SYSMON is memory mapped to PS. This block has > + built-in alarm generation logic that is used to interrupt the processor > + based on condition set. > + > + properties: > + compatible: > + enum: > + - xlnx,zynqmp-ams-ps > + > + reg: > + description: Register Space for PS-SYSMON > + maxItems: 1 > + > + required: > + - compatible > + - reg > + > + additionalProperties: false > + > + "^ams-pl@400,400$": > + type: object > + description: > + PL-SYSMON is capable of monitoring off chip voltage and temperature. > + PL-SYSMON block has DRP, JTAG and I2C interface to enable monitoring > + from external master. Out of this interface currently only DRP is > + supported. This block has alarm generation logic that is used to > + interrupt the processor based on condition set. > + > + properties: > + compatible: > + items: > + - enum: > + - xlnx,zynqmp-ams-pl > + > + reg: > + description: Register Space for PL-SYSMON. > + maxItems: 1 > + > + '#address-cells': > + const: 1 > + > + '#size-cells': > + const: 0 > + > + patternProperties: > + "^channel@([2-4][0-9]|50)$": > + type: object > + description: > + Describes the external channels connected. > + > + properties: > + reg: > + description: > + Pair of pins the channel is connected to. This value is > + same as Channel Number for a particular channel. > + minimum: 20 > + maximum: 50 > + > + xlnx,bipolar: > + $ref: /schemas/types.yaml#/definitions/flag > + type: boolean > + description: > + If the set channel is used in bipolar mode. > + > + required: > + - reg > + > + additionalProperties: false > + > +required: > + - compatible > + - reg > + - ranges > + > +additionalProperties: false > + > +examples: > + - | > + bus { > + #address-cells = <2>; > + #size-cells = <2>; > + > + xilinx_ams: ams@ffa50000 { > + compatible = "xlnx,zynqmp-ams"; > + interrupt-parent = <&gic>; > + interrupts = <0 56 4>; > + reg = <0x0 0xffa50000 0x0 0x800>; > + #address-cells = <1>; > + #size-cells = <1>; > + #io-channel-cells = <1>; > + ranges = <0 0 0xffa50800 0x800>; > + > + ams_ps: ams-ps@0,400 { > + compatible = "xlnx,zynqmp-ams-ps"; > + reg = <0 0x400>; > + }; > + > + ams_pl: ams-pl@400,400 { > + compatible = "xlnx,zynqmp-ams-pl"; > + reg = <0x400 0x400>; > + #address-cells = <1>; > + #size-cells = <0>; > + channel@30 { > + reg = <30>; > + xlnx,bipolar; > + }; > + channel@31 { > + reg = <31>; > + }; > + channel@38 { > + reg = <38>; > + xlnx,bipolar; > + }; > + }; > + }; > + };
