From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:46560 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752681AbdLFQ7w (ORCPT ); Wed, 6 Dec 2017 11:59:52 -0500 Subject: Patch "iio: adc: ti-ads1015: add 10% to conversion wait time" has been added to the 4.9-stable tree To: ladis@linux-mips.org, Jonathan.Cameron@huawei.com, akinobu.mita@gmail.com, alexander.levin@verizon.com, daniel.baluta@gmail.com, gregkh@linuxfoundation.org, jic23@kernel.org Cc: , From: Date: Wed, 06 Dec 2017 17:59:22 +0100 Message-ID: <1512579562113255@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled iio: adc: ti-ads1015: add 10% to conversion wait time to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: iio-adc-ti-ads1015-add-10-to-conversion-wait-time.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From foo@baz Wed Dec 6 17:39:55 CET 2017 From: Ladislav Michl Date: Fri, 25 Aug 2017 07:39:16 +0200 Subject: iio: adc: ti-ads1015: add 10% to conversion wait time From: Ladislav Michl [ Upstream commit fe895ac88b9fbdf2026f0bfd56c82747bb9d7c48 ] As user's guide "ADS1015EVM, ADS1115EVM, ADS1015EVM-PDK, ADS1115EVM-PDK User Guide (Rev. B)" (http://www.ti.com/lit/ug/sbau157b/sbau157b.pdf) states at page 16: "Note that both the ADS1115 and ADS1015 have internal clocks with a ±10% accuracy. If performing FFT tests, frequencies may appear to be incorrect as a result of this tolerance range.", add those 10% to converion wait time. Cc: Daniel Baluta Cc: Jonathan Cameron Signed-off-by: Ladislav Michl Reviewed-by: Akinobu Mita Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/iio/adc/ti-ads1015.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/iio/adc/ti-ads1015.c +++ b/drivers/iio/adc/ti-ads1015.c @@ -269,6 +269,7 @@ int ads1015_get_adc_result(struct ads101 conv_time = DIV_ROUND_UP(USEC_PER_SEC, data->data_rate[dr_old]); conv_time += DIV_ROUND_UP(USEC_PER_SEC, data->data_rate[dr]); + conv_time += conv_time / 10; /* 10% internal clock inaccuracy */ usleep_range(conv_time, conv_time + 1); data->conv_invalid = false; } Patches currently in stable-queue which might be from ladis@linux-mips.org are queue-4.9/iio-adc-ti-ads1015-add-10-to-conversion-wait-time.patch