From patchwork Sat Nov 28 22:28:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandre Belloni X-Patchwork-Id: 11938691 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 85342C64E7D for ; Sat, 28 Nov 2020 22:29:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 569CE221FD for ; Sat, 28 Nov 2020 22:29:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387656AbgK1W3R (ORCPT ); Sat, 28 Nov 2020 17:29:17 -0500 Received: from relay7-d.mail.gandi.net ([217.70.183.200]:38461 "EHLO relay7-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729330AbgK1W3Q (ORCPT ); Sat, 28 Nov 2020 17:29:16 -0500 X-Originating-IP: 86.194.74.19 Received: from localhost (lfbn-lyo-1-997-19.w86-194.abo.wanadoo.fr [86.194.74.19]) (Authenticated sender: alexandre.belloni@bootlin.com) by relay7-d.mail.gandi.net (Postfix) with ESMTPSA id E933720006; Sat, 28 Nov 2020 22:28:31 +0000 (UTC) From: Alexandre Belloni To: Jonathan Cameron Cc: Lars-Peter Clausen , Peter Meerwald-Stadler , Nicolas Ferre , Ludovic Desroches , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Jonathan Cameron , Alexandre Belloni , Rob Herring Subject: [PATCH v3 04/10] dt-bindings:iio:adc:atmel,sama9260-adc: conversion to yaml from at91_adc.txt Date: Sat, 28 Nov 2020 23:28:12 +0100 Message-Id: <20201128222818.1910764-5-alexandre.belloni@bootlin.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201128222818.1910764-1-alexandre.belloni@bootlin.com> References: <20201128222818.1910764-1-alexandre.belloni@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org From: Jonathan Cameron There are a few things we would do differently in an ADC binding if we were starting from scratch but we are stuck with what we have (which made sense back when this was written!) We may be able to tighten up some elements of this binding in the future by careful checking of what values properties can actually take. Signed-off-by: Jonathan Cameron Cc: Alexandre Belloni Cc: Nicolas Ferre Cc: Ludovic Desroches [Alexandre Belloni: add sama5d3, remove atmel,adc-res and atmel,adc-res-names] Signed-off-by: Alexandre Belloni Reviewed-by: Rob Herring Reviewed-by: Ludovic Desroches --- .../devicetree/bindings/iio/adc/at91_adc.txt | 78 -------- .../bindings/iio/adc/atmel,sama9260-adc.yaml | 167 ++++++++++++++++++ 2 files changed, 167 insertions(+), 78 deletions(-) delete mode 100644 Documentation/devicetree/bindings/iio/adc/at91_adc.txt create mode 100644 Documentation/devicetree/bindings/iio/adc/atmel,sama9260-adc.yaml diff --git a/Documentation/devicetree/bindings/iio/adc/at91_adc.txt b/Documentation/devicetree/bindings/iio/adc/at91_adc.txt deleted file mode 100644 index da393ac5c05f..000000000000 --- a/Documentation/devicetree/bindings/iio/adc/at91_adc.txt +++ /dev/null @@ -1,78 +0,0 @@ -* AT91's Analog to Digital Converter (ADC) - -Required properties: - - compatible: Should be "atmel,-adc" - can be "at91sam9260", "at91sam9g45", "at91sam9x5" or "sama5d3" - - reg: Should contain ADC registers location and length - - interrupts: Should contain the IRQ line for the ADC - - clock-names: tuple listing input clock names. - Required elements: "adc_clk", "adc_op_clk". - - clocks: phandles to input clocks. - - atmel,adc-channels-used: Bitmask of the channels muxed and enabled for this - device - - atmel,adc-startup-time: Startup Time of the ADC in microseconds as - defined in the datasheet - - atmel,adc-vref: Reference voltage in millivolts for the conversions - -Optional properties: - - atmel,adc-use-external-triggers: Boolean to enable the external triggers - - atmel,adc-use-res: String selecting the resolution, can be "lowres" or - "highres". If not specified, the highest resolution will - be used. - - atmel,adc-sleep-mode: Boolean to enable sleep mode when no conversion - - atmel,adc-sample-hold-time: Sample and Hold Time in microseconds - - atmel,adc-ts-wires: Number of touchscreen wires. Should be 4 or 5. If this - value is set, then the adc driver will enable touchscreen - support. - NOTE: when adc touchscreen is enabled, the adc hardware trigger will be - disabled. Since touchscreen will occupy the trigger register. - - atmel,adc-ts-pressure-threshold: a pressure threshold for touchscreen. It - makes touch detection more precise. - -Optional trigger Nodes: - - Required properties: - * trigger-name: Name of the trigger exposed to the user - * trigger-value: Value to put in the Trigger register - to activate this trigger - - Optional properties: - * trigger-external: Is the trigger an external trigger? - -Examples: -adc0: adc@fffb0000 { - #address-cells = <1>; - #size-cells = <0>; - compatible = "atmel,at91sam9260-adc"; - reg = <0xfffb0000 0x100>; - interrupts = <20 IRQ_TYPE_LEVEL_HIGH 0>; - clocks = <&adc_clk>, <&adc_op_clk>; - clock-names = "adc_clk", "adc_op_clk"; - atmel,adc-channels-used = <0xff>; - atmel,adc-startup-time = <40>; - atmel,adc-use-external-triggers; - atmel,adc-vref = <3300>; - atmel,adc-res = <8 10>; - atmel,adc-res-names = "lowres", "highres"; - atmel,adc-use-res = "lowres"; - - trigger0 { - trigger-name = "external-rising"; - trigger-value = <0x1>; - trigger-external; - }; - trigger1 { - trigger-name = "external-falling"; - trigger-value = <0x2>; - trigger-external; - }; - - trigger2 { - trigger-name = "external-any"; - trigger-value = <0x3>; - trigger-external; - }; - - trigger3 { - trigger-name = "continuous"; - trigger-value = <0x6>; - }; -}; diff --git a/Documentation/devicetree/bindings/iio/adc/atmel,sama9260-adc.yaml b/Documentation/devicetree/bindings/iio/adc/atmel,sama9260-adc.yaml new file mode 100644 index 000000000000..9b0ff59e75de --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/atmel,sama9260-adc.yaml @@ -0,0 +1,167 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/atmel,sama9260-adc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: AT91 sama9260 and similar Analog to Digital Converter (ADC) + +maintainers: + - Alexandre Belloni + +properties: + compatible: + enum: + - atmel,at91sam9260-adc + - atmel,at91sam9rl-adc + - atmel,at91sam9g45-adc + - atmel,at91sam9x5-adc + - atmel,at91sama5d3-adc + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + clocks: + minItems: 2 + maxItems: 2 + + clock-names: + items: + - const: adc_clk + - const: adc_op_clk + + atmel,adc-channels-used: + $ref: /schemas/types.yaml#/definitions/uint32 + description: Bitmask of the channels muxed and enabled for this device + + atmel,adc-startup-time: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Startup Time of the ADC in microseconds as defined in the datasheet + + atmel,adc-vref: + $ref: /schemas/types.yaml#/definitions/uint32 + description: Reference voltage in millivolts for the conversions + + atmel,adc-use-external-triggers: + $ref: /schemas/types.yaml#/definitions/flag + description: Enable the external triggers + + atmel,adc-use-res: + $ref: /schemas/types.yaml#/definitions/string + description: + String corresponding to an identifier from atmel,adc-res-names property. + If not specified, the highest resolution will be used. + enum: + - "lowres" + - "highres" + + atmel,adc-sleep-mode: + $ref: /schemas/types.yaml#/definitions/flag + description: Enable sleep mode when no conversion + + atmel,adc-sample-hold-time: + $ref: /schemas/types.yaml#/definitions/uint32 + description: Sample and Hold Time in microseconds + + atmel,adc-ts-wires: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Number of touchscreen wires. Must be set to enable touchscreen. + NOTE: when adc touchscreen is enabled, the adc hardware trigger will be + disabled. Since touchscreen will occupy the trigger register. + enum: + - 4 + - 5 + + atmel,adc-ts-pressure-threshold: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Pressure threshold for touchscreen. + + "#io-channel-cells": + const: 1 + +additionalProperties: false + +required: + - compatible + - reg + - interrupts + - clocks + - clock-names + - atmel,adc-channels-used + - atmel,adc-startup-time + - atmel,adc-vref + +patternProperties: + "^(trigger)[0-9]$": + type: object + description: Child node to describe a trigger exposed to the user. + properties: + trigger-name: + $ref: /schemas/types.yaml#/definitions/string + description: Identifying name. + + trigger-value: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Value to put in the Trigger register to activate this trigger + + trigger-external: + $ref: /schemas/types.yaml#/definitions/flag + description: This trigger is provided from an external pin. + + additionalProperties: false + required: + - trigger-name + - trigger-value + +examples: + - | + #include + #include + soc { + #address-cells = <1>; + #size-cells = <1>; + + adc@fffb0000 { + compatible = "atmel,at91sam9260-adc"; + reg = <0xfffb0000 0x100>; + interrupts = <20 IRQ_TYPE_LEVEL_HIGH 0>; + clocks = <&adc_clk>, <&adc_op_clk>; + clock-names = "adc_clk", "adc_op_clk"; + atmel,adc-channels-used = <0xff>; + atmel,adc-startup-time = <40>; + atmel,adc-use-external-triggers; + atmel,adc-vref = <3300>; + atmel,adc-use-res = "lowres"; + + trigger0 { + trigger-name = "external-rising"; + trigger-value = <0x1>; + trigger-external; + }; + + trigger1 { + trigger-name = "external-falling"; + trigger-value = <0x2>; + trigger-external; + }; + + trigger2 { + trigger-name = "external-any"; + trigger-value = <0x3>; + trigger-external; + }; + + trigger3 { + trigger-name = "continuous"; + trigger-value = <0x6>; + }; + }; + }; +...