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Date:   Thu, 30 Aug 2018 15:52:17 +0530
From:   Manish Narani <manish.narani@...inx.com>
To:     <jic23@...nel.org>, <knaack.h@....de>, <lars@...afoo.de>,
        <pmeerw@...erw.net>, <robh+dt@...nel.org>, <mark.rutland@....com>,
        <michal.simek@...inx.com>, <manish.narani@...inx.com>,
        <leoyang.li@....com>, <sudeep.holla@....com>,
        <amit.kucheria@...aro.org>, <broonie@...nel.org>,
        <arnaud.pouliquen@...com>, <geert@...ux-m68k.org>,
        <eugen.hristev@...rochip.com>, <rdunlap@...radead.org>,
        <lukas@...ner.de>, <freeman.liu@...eadtrum.com>,
        <vilhelm.gray@...il.com>, <tglx@...utronix.de>,
        <baolin.wang@...aro.org>, <gregkh@...uxfoundation.org>
CC:     <sgoud@...inx.com>, <anirudh@...inx.com>,
        <linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/3] dt-bindings: iio: adc: Add Xilinx AMS binding documentation

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@...inx.com>
---
 .../devicetree/bindings/iio/adc/xilinx-ams.txt     | 159 +++++++++++++++++++++
 1 file changed, 159 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..8cc96f0
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/xilinx-ams.txt
@@ -0,0 +1,159 @@
+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.
+PL-SYSMON block 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.
+Other block PS-SYSMON is memory mapped to PS. Both of block has built-in
+alarm generation logic that is used to interrupt the processor based on
+condition set.
+
+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 device tree subnode:
+	- compatible: Should be "xlnx,zynqmp-ams-ps" or "xlnx,zynqmp-ams-pl"
+	- reg:  Register space for PS or PL
+
+Optional properties:
+
+Following optional property only valid for PL.
+	- xlnx,ext-channels: List of external channels that are connected to the
+	                     AMS PL module.
+
+	  The child nodes of this node represent the external channels which are
+	  connected to the AMS 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.
+				0: VP/VN
+				1: VUSER0
+				2: VUSER1
+				3: VUSER3
+				4: VUSER4
+				5: VAUXP[0]/VAUXN[0]
+				6: VAUXP[1]/VAUXN[1]
+				...
+				20: VAUXP[15]/VAUXN[15]
+			  Note each channel number should only be used at most
+			  once.
+		Optional properties:
+			* xlnx,bipolar: If set the channel is used in bipolar
+			  mode.
+
+
+Example:
+	xilinx_ams: ams@...50000 {
+		compatible = "xlnx,zynqmp-ams";
+		interrupt-parent = <&gic>;
+		interrupts = <0 56 4>;
+		interrupt-names = "ams-irq";
+		clocks = <&clkc 70>;
+		reg = <0x0 0xffa50000 0x0 0x800>;
+		reg-names = "ams-base";
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		ams_ps: ams_ps@...50800 {
+			compatible = "xlnx,zynqmp-ams-ps";
+			reg = <0x0 0xffa50800 0x0 0x400>;
+		};
+
+		ams_pl: ams_pl@...50c00 {
+			compatible = "xlnx,zynqmp-ams-pl";
+			reg = <0x0 0xffa50c00 0x0 0x400>;
+			xlnx,ext-channels {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				channel@0 {
+					reg = <0>;
+					xlnx,bipolar;
+				};
+				channel@1 {
+					reg = <1>;
+				};
+				channel@8 {
+					reg = <8>;
+					xlnx,bipolar;
+				};
+			};
+		};
+	};
+
+AMS Channels 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 Measurment (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 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	|Differencial 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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