From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933865AbcIGRzl (ORCPT ); Wed, 7 Sep 2016 13:55:41 -0400 Received: from mail-yw0-f196.google.com ([209.85.161.196]:36100 "EHLO mail-yw0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932255AbcIGRzh (ORCPT ); Wed, 7 Sep 2016 13:55:37 -0400 From: William Breathitt Gray To: jic23@kernel.org, knaack.h@gmx.de, lars@metafoo.de, pmeerw@pmeerw.net Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, William Breathitt Gray Subject: [PATCH 1/2] iio: Implement counter channel type and info constants Date: Wed, 7 Sep 2016 13:55:30 -0400 Message-Id: <6a27560d27e0554b632e68b017427b8697419a26.1473265537.git.vilhelm.gray@gmail.com> X-Mailer: git-send-email 2.7.3 In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Quadrature encoders, such as rotary encoders and linear encoders, are devices which are capable of encoding the relative position and direction of motion of a shaft. This patch introduces several IIO constants for supporting quadrature encoder counter devices. IIO_COUNT: Current count (main data provided by the counter device) IIO_CHAN_INFO_FLAGS: Counter flag states (e.g. underflows, overflows, errors, etc.) IIO_CHAN_INFO_DIRECTION: Set high when counting up and reset low when counting down IIO_CHAN_INFO_INDEX: Set high when index input is at active level IIO_CHAN_INFO_MODE: Count value encoding, counter range setting, quadrature phase mode, etc. IIO_CHAN_INFO_PRESET: Counter preset value IIO_CHAN_INFO_PRESET_EN: Set high to preset counter on signal (e.g. index input at active level) Signed-off-by: William Breathitt Gray --- drivers/iio/industrialio-core.c | 7 +++++++ include/linux/iio/iio.h | 6 ++++++ include/uapi/linux/iio/types.h | 1 + 3 files changed, 14 insertions(+) diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index 0528a0c..bfdb09d 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -81,6 +81,7 @@ static const char * const iio_chan_type_name_spec[] = { [IIO_PH] = "ph", [IIO_UVINDEX] = "uvindex", [IIO_ELECTRICALCONDUCTIVITY] = "electricalconductivity", + [IIO_COUNT] = "count", }; static const char * const iio_modifier_names[] = { @@ -151,6 +152,12 @@ static const char * const iio_chan_info_postfix[] = { [IIO_CHAN_INFO_DEBOUNCE_TIME] = "debounce_time", [IIO_CHAN_INFO_CALIBEMISSIVITY] = "calibemissivity", [IIO_CHAN_INFO_OVERSAMPLING_RATIO] = "oversampling_ratio", + [IIO_CHAN_INFO_FLAGS] = "flags", + [IIO_CHAN_INFO_DIRECTION] = "direction", + [IIO_CHAN_INFO_INDEX] = "index", + [IIO_CHAN_INFO_MODE] = "mode", + [IIO_CHAN_INFO_PRESET] = "preset", + [IIO_CHAN_INFO_PRESET_EN] = "preset_enable", }; /** diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index b4a0679..13543fd 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -46,6 +46,12 @@ enum iio_chan_info_enum { IIO_CHAN_INFO_DEBOUNCE_TIME, IIO_CHAN_INFO_CALIBEMISSIVITY, IIO_CHAN_INFO_OVERSAMPLING_RATIO, + IIO_CHAN_INFO_FLAGS, + IIO_CHAN_INFO_DIRECTION, + IIO_CHAN_INFO_INDEX, + IIO_CHAN_INFO_MODE, + IIO_CHAN_INFO_PRESET, + IIO_CHAN_INFO_PRESET_EN, }; enum iio_shared_by { diff --git a/include/uapi/linux/iio/types.h b/include/uapi/linux/iio/types.h index 22e5e58..e227039 100644 --- a/include/uapi/linux/iio/types.h +++ b/include/uapi/linux/iio/types.h @@ -40,6 +40,7 @@ enum iio_chan_type { IIO_PH, IIO_UVINDEX, IIO_ELECTRICALCONDUCTIVITY, + IIO_COUNT, }; enum iio_modifier { -- 2.7.3