From patchwork Wed Apr 12 12:27:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matti Vaittinen X-Patchwork-Id: 13209120 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 81CD4C7619A for ; Wed, 12 Apr 2023 12:28:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229744AbjDLM1k (ORCPT ); Wed, 12 Apr 2023 08:27:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38236 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231643AbjDLM1g (ORCPT ); Wed, 12 Apr 2023 08:27:36 -0400 Received: from mail-lf1-x133.google.com (mail-lf1-x133.google.com [IPv6:2a00:1450:4864:20::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5017030EE; Wed, 12 Apr 2023 05:27:26 -0700 (PDT) Received: by mail-lf1-x133.google.com with SMTP id t20so14439552lfd.5; Wed, 12 Apr 2023 05:27:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1681302444; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=sgOwPu+FboPmTEq+F0N4Fog/45+TxGJHI0yCy72fcPY=; b=bUGFSLOHSf8IOPs0vBg4h3142MTO/Uar2S7LbKDhUcqBXArUyeIogzmCBzqZpLXbOv 6LEcsgmaK5Iz536y7HqVscXtUbwLtyt6isKczHv7M851ZqYxFF2C1PLxawMExL1/rJtx cXQJ1wkeyR4oiJNPQX/aoYi5FapO4QAG/EyARlWXGnLD5ZUrUe9jOznW2cmp7hVS1u7A g+dZaNUjXBPvbBlef8wczMA5/f7iyn0hByjFS4Yw+aeL2O6vt3I/VBiQHPdJ06vbJv7n UJprE3rDrj7y9Ud3K/iJDpBQ/NGBuzJtbkyPoutOGfEePpFB9DeLjzsmIW0y7dHDflxU e8/g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1681302444; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=sgOwPu+FboPmTEq+F0N4Fog/45+TxGJHI0yCy72fcPY=; b=TS5j7l6NxcNnqz7+K/xK1agVy9J4dTwwwwTjmylQyXSAhk6npRxGPNdhrx8jSaSCCp thfYXXYHqeufASOMljDSVHz7vrAZniuXhNXxyQBZAiV7CTcbuv9dSWHAUJyYiwPmN2Cm NfVl5aRVFEDLJDBrcHvGEnojVemmRB1Uq/7+hyOBq/T2YwY5mJnNxlWNHaCqDDOyqmxn f3+O5NPGsRkk3dXGRBHrm82EjFCFipmknU3I/OwctaQiX7vrk0bXqPappjodRS5x452G e1No0WMoT6T2fQudhCiSBOclc9uZviIPPViBZjV7x9Ymd4K9mKj7bsmuPRsQkSs7+fWc hC2w== X-Gm-Message-State: AAQBX9cGY4msQ/gspEF4jkcUs1KFw6f0jbUhXAOGg5Eue6rexyrJys/w 6WupzRcNq/2H95rZM9LQkuc= X-Google-Smtp-Source: AKy350aBtZqbgVz7RlRlx7n4YpwLva9wu/Kfqr4nf7VKOrm3wlO+oRyizn3t5nCyVXo4+TKAfWEffw== X-Received: by 2002:ac2:44a3:0:b0:4e9:bf52:7898 with SMTP id c3-20020ac244a3000000b004e9bf527898mr566918lfm.37.1681302444438; Wed, 12 Apr 2023 05:27:24 -0700 (PDT) Received: from dc75zzyyyyyyyyyyyyyyt-3.rev.dnainternet.fi (dc75zzyyyyyyyyyyyyyyt-3.rev.dnainternet.fi. [2001:14ba:16f3:4a00::1]) by smtp.gmail.com with ESMTPSA id z20-20020ac25df4000000b004d85895d7e0sm2984411lfq.147.2023.04.12.05.27.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 12 Apr 2023 05:27:23 -0700 (PDT) Date: Wed, 12 Apr 2023 15:27:14 +0300 From: Matti Vaittinen To: Matti Vaittinen Cc: Jonathan Cameron , Lars-Peter Clausen , Matti Vaittinen , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/3] iio: core: add IIO_VAL_INT_MICRO Message-ID: References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org There are a few cases like light sensor integration times, where values returned from *_available() and read_raw() are smaller than 1 and often in the units of micro. (Like micro second scale integration times, always smaller than 1 second). Currently those are often handled using IIO_VAL_INT_PLUS_MICRO, which requires drivers to initialize the integer part to zero. Furthermore, using IIO_VAL_INT_PLUS_MICRO in iio lists requires one to always allocate the 'dummy' integer part too. Introduce IIO_VAL_INT_MICRO which allows omitting the always zero integer. Signed-off-by: Matti Vaittinen --- drivers/iio/industrialio-core.c | 4 ++++ include/linux/iio/types.h | 1 + 2 files changed, 5 insertions(+) diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index c117f50d0cf3..c5ae965e9961 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -628,6 +628,8 @@ static ssize_t __iio_format_value(char *buf, size_t offset, unsigned int type, switch (type) { case IIO_VAL_INT: return sysfs_emit_at(buf, offset, "%d", vals[0]); + case IIO_VAL_INT_MICRO: + return sysfs_emit_at(buf, offset, "0.%06u", vals[0]); case IIO_VAL_INT_PLUS_MICRO_DB: scale_db = true; fallthrough; @@ -758,6 +760,7 @@ static ssize_t iio_format_list(char *buf, const int *vals, int type, int length, switch (type) { case IIO_VAL_INT: + case IIO_VAL_INT_MICRO: stride = 1; break; default: @@ -952,6 +955,7 @@ static ssize_t iio_write_channel_info(struct device *dev, case IIO_VAL_INT_PLUS_MICRO_DB: scale_db = true; fallthrough; + case IIO_VAL_INT_MICRO: case IIO_VAL_INT_PLUS_MICRO: fract_mult = 100000; break; diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h index 82faa98c719a..b4e316172c7f 100644 --- a/include/linux/iio/types.h +++ b/include/linux/iio/types.h @@ -30,6 +30,7 @@ enum iio_event_info { #define IIO_VAL_FRACTIONAL 10 #define IIO_VAL_FRACTIONAL_LOG2 11 #define IIO_VAL_CHAR 12 +#define IIO_VAL_INT_MICRO 13 /* val is micro . Integer part is 0 */ enum iio_available_type { IIO_AVAIL_LIST,