From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jonathan Cameron Subject: Re: [PATCH v2 1/4] dt-bindings: iio: adc: Add Xilinx AMS binding documentation Date: Sun, 16 Sep 2018 11:01:20 +0100 Message-ID: <20180916110120.243fcf11@archlinux> References: <1536909510-7166-1-git-send-email-manish.narani@xilinx.com> <1536909510-7166-2-git-send-email-manish.narani@xilinx.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1536909510-7166-2-git-send-email-manish.narani@xilinx.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Manish Narani Cc: mark.rutland@arm.com, kstewart@linuxfoundation.org, linux-iio@vger.kernel.org, robh+dt@kernel.org, pmeerw@pmeerw.net, freeman.liu@spreadtrum.com, lars@metafoo.de, michal.simek@xilinx.com, geert@linux-m68k.org, sgoud@xilinx.com, devicetree@vger.kernel.org, knaack.h@gmx.de, vilhelm.gray@gmail.com, broonie@kernel.org, ak@it-klinger.de, linux-arm-kernel@lists.infradead.org, gregkh@linuxfoundation.org, rdunlap@infradead.org, arnaud.pouliquen@st.com, linux-kernel@vger.kernel.org, amit.kucheria@linaro.org, leoyang.li@nxp.com, lukas@wunner.de, anirudh@xilinx.com, sudeep.holla@arm.com, eugen.hristev@microchip.com List-Id: devicetree@vger.kernel.org On Fri, 14 Sep 2018 12:48:27 +0530 Manish Narani 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: Manish Narani > --- > .../devicetree/bindings/iio/adc/xilinx-ams.txt | 180 +++++++++++++++++++++ > 1 file changed, 180 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..d0958a1 > --- /dev/null > +++ b/Documentation/devicetree/bindings/iio/adc/xilinx-ams.txt > @@ -0,0 +1,180 @@ > +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 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"; > + clocks = <&clkc 70>; > + reg = <0x0 0xffa50000 0x0 0x800>; > + reg-names = "ams-base"; > + ranges; > + > + ams_ps: ams_ps@ffa50800 { > + compatible = "xlnx,zynqmp-ams-ps"; > + reg = <0x0 0xffa50800 0x0 0x400>; Rob Herring mentioned this in the previous version. Why 64 bit addresses? Also this isn't how I understand ranges to be used... https://elinux.org/Device_Tree_Usage#Ranges_.28Address_Translation.29 > + }; > + > + ams_pl: ams_pl@ffa50c00 { > + compatible = "xlnx,zynqmp-ams-pl"; > + reg = <0x0 0xffa50c00 0x0 0x400>; > + xlnx,ext-channels { > + 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 > +---------------------------------------------------------------------------------------------------------