Messages in this thread Patch in this message | | | From | Manish Narani <> | Subject | [PATCH v3 1/3] dt-bindings: iio: adc: Add Xilinx AMS binding documentation | Date | Mon, 29 Oct 2018 17:40:24 +0530 |
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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: Manish Narani <manish.narani@xilinx.com> --- .../devicetree/bindings/iio/adc/xilinx-ams.txt | 183 +++++++++++++++++++++ 1 file changed, 183 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/adc/xilinx-ams.txt
diff --git a/Documentation/devicetree/bindings/iio/adc/xilinx-ams.txt b/Documentation/devicetree/bindings/iio/adc/xilinx-ams.txt new file mode 100644 index 0000000..1635576 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/xilinx-ams.txt @@ -0,0 +1,183 @@ +Xilinx AMS controller +````````````````````` +The AMS 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. + +Required properties: + - compatible: Should be "xlnx,zynqmp-ams" + - reg: Should specify AMS register space + - interrupts: Interrupt number for the AMS control interface + - interrupt-names: Interrupt name, must be "ams-irq" + - clocks: Should contain a clock specifier for the device + - ranges: keep the property empty to map child address space + (for PS and/or PL) nodes 1:1 onto the parent address + space + + AMS sub-nodes: + - ams_ps : Used as PS-SYSMON node + - ams_pl : Used as PL-SYSMON node + + + +AMS PS-SYSMON +````````````` +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. + +Required properties: + - compatible: Should be "xlnx,zynqmp-ams-ps" + - reg: Register space for PS-SYSMON + + + +AMS PL-SYSMON +````````````` +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. + +Required properties: + - compatible: Should be "xlnx,zynqmp-ams-pl" + - reg: Register space for PL-SYSMON + +PL-SYSMON optional sub-nodes: + - xlnx,ext-channels: List of external channels that are connected to the + AMS PL module. + + The child nodes of PL-SYSMON represent the external channels which are + connected to this Module. If the property is not present + no external channels will be assumed to be connected. + + Each child node represents one channel and has the following + properties: + + Required properties: + * reg: Pair of pins the channel is connected to. + + 'reg' value Channel Name Channel Number + ----------- ------------ -------------- + 0 VP/VN 30 + 1 VUSER0 31 + 2 VUSER1 32 + 3 VUSER3 33 + 4 VUSER4 34 + 5 VAUXP[0]/VAUXN[0] 35 + 6 VAUXP[1]/VAUXN[1] 36 + ... + 20 VAUXP[15]/VAUXN[15] 50 + + Each channel number should only be used at most once. For + more details on channels, refer to the table given at the end. + + Optional properties: + * xlnx,bipolar: If set the channel is used in bipolar + mode. + + +Example: + xilinx_ams: ams@ffa50000 { + compatible = "xlnx,zynqmp-ams"; + interrupt-parent = <&gic>; + interrupts = <0 56 4>; + interrupt-names = "ams-irq"; + reg = <0x0 0xffa50000 0x0 0x800>; + reg-names = "ams-base"; + #address-cells = <1>; + #size-cells = <1>; + #io-channel-cells = <1>; + ranges = <0 0 0xffa50800 0x400 + 1 0 0xffa50c00 0x400>; + + ams_ps: ams_ps@0,0 { + compatible = "xlnx,zynqmp-ams-ps"; + reg = <0 0x400>; + }; + + ams_pl: ams_pl@1,0 { + compatible = "xlnx,zynqmp-ams-pl"; + reg = <0 0x400>; + xlnx,ext-channels { + channel@0 { + reg = <0>; + xlnx,bipolar; + }; + channel@1 { + reg = <1>; + }; + channel@8 { + reg = <8>; + xlnx,bipolar; + }; + }; + }; + }; + + +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 +--------------------------------------------------------------------------------------------------------- -- 2.1.1
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