From mboxrd@z Thu Jan 1 00:00:00 1970 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=-18.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 24D77C432BE for ; Tue, 10 Aug 2021 06:55:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0463761077 for ; Tue, 10 Aug 2021 06:55:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235727AbhHJG4K (ORCPT ); Tue, 10 Aug 2021 02:56:10 -0400 Received: from mail.kernel.org ([198.145.29.99]:44864 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231482AbhHJG4K (ORCPT ); Tue, 10 Aug 2021 02:56:10 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 534CD61052; Tue, 10 Aug 2021 06:55:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1628578548; bh=RVZtgBllZILs8j0Ee1WWG8An+MwVcPIPGAHRkW6Bwi8=; h=Subject:To:From:Date:From; b=I/ZwCI0r30YtKyo7BlHGX+fMsSfdNm1mjVRS2s7UrOsOMP44kvNIlNH/Zu/zS4B8l zU4fnVzK7ZtYFG7gzbxUDLsn5rT+jUnQt2PygNcx2jthq0QboyiWw5hmgFUOoeINX3 1hyUFrejkMBxTj+Ow5Da0MxBR3VlHn794dL1pB44= Subject: patch "iio: humidity: hdc100x: Add margin to the conversion time" added to staging-linus To: chris.lesiak@licor.com, Jonathan.Cameron@huawei.com, Stable@vger.kernel.org, matt.ranostay@konsulko.com From: Date: Tue, 10 Aug 2021 08:55:33 +0200 Message-ID: <162857853312928@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org This is a note to let you know that I've just added the patch titled iio: humidity: hdc100x: Add margin to the conversion time to my staging git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git in the staging-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. >From 84edec86f449adea9ee0b4912a79ab8d9d65abb7 Mon Sep 17 00:00:00 2001 From: Chris Lesiak Date: Mon, 14 Jun 2021 09:18:20 -0500 Subject: iio: humidity: hdc100x: Add margin to the conversion time The datasheets have the following note for the conversion time specification: "This parameter is specified by design and/or characterization and it is not tested in production." Parts have been seen that require more time to do 14-bit conversions for the relative humidity channel. The result is ENXIO due to the address phase of a transfer not getting an ACK. Delay an additional 1 ms per conversion to allow for additional margin. Fixes: 4839367d99e3 ("iio: humidity: add HDC100x support") Signed-off-by: Chris Lesiak Acked-by: Matt Ranostay Link: https://lore.kernel.org/r/20210614141820.2034827-1-chris.lesiak@licor.com Cc: Signed-off-by: Jonathan Cameron --- drivers/iio/humidity/hdc100x.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/iio/humidity/hdc100x.c b/drivers/iio/humidity/hdc100x.c index 2a957f19048e..9e0fce917ce4 100644 --- a/drivers/iio/humidity/hdc100x.c +++ b/drivers/iio/humidity/hdc100x.c @@ -25,6 +25,8 @@ #include #include +#include + #define HDC100X_REG_TEMP 0x00 #define HDC100X_REG_HUMIDITY 0x01 @@ -166,7 +168,7 @@ static int hdc100x_get_measurement(struct hdc100x_data *data, struct iio_chan_spec const *chan) { struct i2c_client *client = data->client; - int delay = data->adc_int_us[chan->address]; + int delay = data->adc_int_us[chan->address] + 1*USEC_PER_MSEC; int ret; __be16 val; @@ -316,7 +318,7 @@ static irqreturn_t hdc100x_trigger_handler(int irq, void *p) struct iio_dev *indio_dev = pf->indio_dev; struct hdc100x_data *data = iio_priv(indio_dev); struct i2c_client *client = data->client; - int delay = data->adc_int_us[0] + data->adc_int_us[1]; + int delay = data->adc_int_us[0] + data->adc_int_us[1] + 2*USEC_PER_MSEC; int ret; /* dual read starts at temp register */ -- 2.32.0