ad5791 offload #2616
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| Original file line number | Diff line number | Diff line change |
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| // SPDX-License-Identifier: GPL-2.0 | ||
| /* | ||
| * Analog Devices AD5791 | ||
| * https://www.analog.com/en/products/ad5791.html | ||
| * https://analogdevicesinc.github.io/hdl/projects/ad57xx_ardz/index.html | ||
| * https://www.analog.com/en/resources/evaluation-hardware-and-software/evaluation-boards-kits/EVAL-AD5791ARDZ.html | ||
| * https://wiki.analog.com/resources/tools-software/linux-build/generic/socfpga | ||
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| * | ||
| * hdl_project: <ad57xx_ardz/de10nano> | ||
| * board_revision: <B> | ||
| * | ||
| * Copyright (C) 2024 Analog Devices Inc. | ||
| */ | ||
| /dts-v1/; | ||
| #include "socfpga_cyclone5_de10_nano_hps.dtsi" | ||
| #include <dt-bindings/dma/axi-dmac.h> | ||
| #include <dt-bindings/interrupt-controller/irq.h> | ||
| #include <dt-bindings/gpio/gpio.h> | ||
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| / { | ||
| dac_vdd: regulator-vdd { | ||
| compatible = "regulator-fixed"; | ||
| regulator-name = "fixed-supply"; | ||
| regulator-min-microvolt = <4096000>; | ||
| regulator-max-microvolt = <4096000>; | ||
| regulator-always-on; | ||
| }; | ||
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| dac_vss: regulator-vss { | ||
| compatible = "regulator-fixed"; | ||
| regulator-name = "fixed-supply"; | ||
| regulator-min-microvolt = <4096000>; | ||
| regulator-max-microvolt = <4096000>; | ||
| regulator-always-on; | ||
| }; | ||
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| }; | ||
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| &fpga_axi { | ||
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| adc_trigger: pwm@0x00050000 { | ||
| compatible = "adi,axi-pwmgen-2.00.a"; | ||
| reg = <0x00050000 0x1000>; | ||
| #pwm-cells = <2>; | ||
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There was a problem hiding this comment. Using |
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| clocks = <&spi_clk 0>; | ||
| }; | ||
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| tx_dma: tx-dma@0x00030000 { | ||
| compatible = "adi,axi-dmac-1.00.a"; | ||
| reg = <0x00030000 0x00000800>; | ||
| #dma-cells = <1>; | ||
| interrupt-parent = <&intc>; | ||
| interrupts = <0 44 IRQ_TYPE_LEVEL_HIGH>; | ||
| clocks = <&spi_clk 0>; | ||
| }; | ||
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| spi_clk: clock-controller@0x00060000 { | ||
| compatible = "altr,c5-fpll"; | ||
| reg = <0x00060000 0x00000100>; | ||
| #clock-cells = <0x1>; | ||
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| #address-cells = <1>; | ||
| #size-cells = <0>; | ||
| clocks = <&sys_clk>; | ||
| assigned-clocks = <&spi_clk 0>; | ||
| assigned-clock-rates = <185000000>; | ||
| clock-output-names = "outclk0"; | ||
| adi,fractional-carry-bit = <32>; | ||
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| spi_c0: channel@0 { | ||
| reg = <0>; | ||
| adi,extended-name = "SPI_CLOCK"; | ||
| }; | ||
| }; | ||
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| spi@0x00040000 { | ||
| compatible = "adi-ex,axi-spi-engine-1.00.a"; | ||
| reg = <0x00040000 0x00010000>; | ||
| interrupt-parent = <&intc>; | ||
| interrupts = <0 45 IRQ_TYPE_LEVEL_HIGH>; | ||
| clocks = <&sys_clk>, <&spi_clk 0>; | ||
| clock-names = "s_axi_aclk", "spi_clk"; | ||
| #address-cells = <0x1>; | ||
| #size-cells = <0x0>; | ||
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| ad57xx_1: dac@0 { | ||
| compatible = "adi,ad5791"; | ||
| spi-cpha; | ||
| reg = <0>; | ||
| spi-max-frequency = <35000000>; | ||
| vss-supply = <&dac_vss>; | ||
| vdd-supply = <&dac_vdd>; | ||
| reset-gpios = <&gpio_bd 16 GPIO_ACTIVE_LOW>; | ||
| clear-gpios = <&gpio_bd 17 GPIO_ACTIVE_LOW>; | ||
| ldac-gpios = <&gpio_bd 18 GPIO_ACTIVE_LOW>; | ||
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| clocks = <&spi_clk 0>; | ||
| clock-names = "ref_clk"; | ||
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| dmas = <&tx_dma 0>; | ||
| dma-names = "tx"; | ||
| pwms = <&adc_trigger 0 0>; | ||
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There was a problem hiding this comment. How unusual to have the default period 0. I'd rather expect to see a period that matches the max freq for that chip here (or something bigger). There was a problem hiding this comment. ok. just for the record, i could not clearly make out a max frequency clearly mentioned on the datasheet. |
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| pwm-names = "cnv"; | ||
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| }; | ||
| }; | ||
| }; | ||
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Jonathan also likes to have all of the power supplies in the bindings, so we can add
vcc-suppy,vrefp-supply,vrefn-supplyandiovcc-supplywhen we submit this upstream.