From patchwork Mon Mar 29 07:31:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oleksij Rempel X-Patchwork-Id: 410959 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 3B786C433E6 for ; Mon, 29 Mar 2021 07:32:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 23E1561968 for ; Mon, 29 Mar 2021 07:32:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230452AbhC2HcF (ORCPT ); Mon, 29 Mar 2021 03:32:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37452 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229711AbhC2Hbk (ORCPT ); Mon, 29 Mar 2021 03:31:40 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CA066C061574 for ; Mon, 29 Mar 2021 00:31:39 -0700 (PDT) Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lQmN3-0001Sn-KL; Mon, 29 Mar 2021 09:31:33 +0200 Received: from ore by dude.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1lQmN2-0000TR-Qy; Mon, 29 Mar 2021 09:31:32 +0200 From: Oleksij Rempel To: Rob Herring , Jonathan Cameron Cc: Oleksij Rempel , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Pengutronix Kernel Team , David Jander , Robin van der Gracht , linux-iio@vger.kernel.org, Lars-Peter Clausen , Peter Meerwald-Stadler , Dmitry Torokhov Subject: [PATCH v5 1/3] dt-bindings:iio:adc: add generic settling-time-us and oversampling-ratio channel properties Date: Mon, 29 Mar 2021 09:31:29 +0200 Message-Id: <20210329073131.1759-2-o.rempel@pengutronix.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210329073131.1759-1-o.rempel@pengutronix.de> References: <20210329073131.1759-1-o.rempel@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: ore@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: devicetree@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Settling time and over sampling is a typical challenge for different IIO ADC devices. So, introduce channel specific settling-time-us and oversampling-ratio properties to cover this use case. Signed-off-by: Oleksij Rempel --- Documentation/devicetree/bindings/iio/adc/adc.yaml | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/adc/adc.yaml b/Documentation/devicetree/bindings/iio/adc/adc.yaml index 912a7635edc4..d5bc86d2a2af 100644 --- a/Documentation/devicetree/bindings/iio/adc/adc.yaml +++ b/Documentation/devicetree/bindings/iio/adc/adc.yaml @@ -39,4 +39,12 @@ properties: The first value specifies the positive input pin, the second specifies the negative input pin. + settling-time-us: + description: + Time between enabling the channel and firs stable readings. + + oversampling-ratio: + $ref: /schemas/types.yaml#/definitions/uint32 + description: Number of data samples which are averaged for each read. + additionalProperties: true