From patchwork Mon Apr 11 20:31:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jagath Jog J X-Patchwork-Id: 12809618 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 DBBFEC43219 for ; Mon, 11 Apr 2022 20:32:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349840AbiDKUeO (ORCPT ); Mon, 11 Apr 2022 16:34:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54132 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349885AbiDKUeN (ORCPT ); Mon, 11 Apr 2022 16:34:13 -0400 Received: from mail-pj1-x1029.google.com (mail-pj1-x1029.google.com [IPv6:2607:f8b0:4864:20::1029]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4884A36151; Mon, 11 Apr 2022 13:31:55 -0700 (PDT) Received: by mail-pj1-x1029.google.com with SMTP id o5-20020a17090ad20500b001ca8a1dc47aso453060pju.1; Mon, 11 Apr 2022 13:31:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=nVy+PdUdt3aYbmKl1De/O0IbA9jK9d4aWpuuU9JRDr0=; b=I0BOtu/NTUxum3tk1mDK4B4v9Tk/DOk/HjsgtA0CG0tELAoHcWuEID0q9kXAvPjvyY RTmxFA1WD68lC7h2hRvB+6kCo2D/Yu1/Z1jRmUIX+aexHC9ofI1nEFToFPMG/oW3LI5q q/D/Df0Z9xfri8lrhUBEnPaHWtK2IeEsn20NRI/zRhSTG3ZyZ+EnUpS5ipMt9aHfB5VU ZAg1mQuMOkAAg4dZTVMaj5qBR+n4/6WFRtmbd8Yc8zQidgWJXeglmvmuI+aMxi6gl1NG zX7zblPGjKEYlNlr4zj8XVsbxTx8n3VS1Ri4cOZbo4QW9/LLRARxYsdd6yUhKpVV257P Tamw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=nVy+PdUdt3aYbmKl1De/O0IbA9jK9d4aWpuuU9JRDr0=; b=F8PxvsWGL/hKIYFnfYVtWRvKesp5OhuzO+CQN9/OZQPWjysWfD/TVWPRPBSzeu758r rhwriQYVyB7iMpalfAe5bGfIwcPWvXSDiKvzBhX51AWcmEI6lSw5Xk1Y/n7s7VpdL+Fs +Qg3a0J+WX8mmvvDMkxqQUEYSJ5P1S+yHpZt29o1dU/BuXBpYZPmq45yt18JZobmpOpp E/aFcP6BZlLo1oFBggOFcTp/44B82AqoWOmStWv1HpqrIYgVnXq0JiJOysECs+3mnkN7 sI+ZBJaldjNpxOx5PpkWU5l4e/ZAo4sKD0noGCwiPj3gPSX4/SQWGZ4kygpmAG48jsgf SgOQ== X-Gm-Message-State: AOAM530pY2ymPkQ0u5dgfp9a435ene+E6XwoPcazUbwdLV2n4iNtmmym PU1cEDgImGnHoRRSpGJVTP0= X-Google-Smtp-Source: ABdhPJyspJIGql9cAc4QJC3lhh50NSLTb/oRc3xE/Arap4dWYLja8tYgSWYEAKrReNGd3RaPGq24oQ== X-Received: by 2002:a17:902:ef46:b0:153:81f7:7fc2 with SMTP id e6-20020a170902ef4600b0015381f77fc2mr34343014plx.26.1649709114611; Mon, 11 Apr 2022 13:31:54 -0700 (PDT) Received: from localhost.localdomain ([27.7.99.112]) by smtp.gmail.com with ESMTPSA id z15-20020a056a001d8f00b004fda37855ddsm34069828pfw.168.2022.04.11.13.31.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 Apr 2022 13:31:54 -0700 (PDT) From: Jagath Jog J To: dan@dlrobertson.com, jic23@kernel.org, andy.shevchenko@gmail.com Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 7/9] iio: accel: bma400: Add activity recognition support Date: Tue, 12 Apr 2022 02:01:31 +0530 Message-Id: <20220411203133.19929-8-jagathjog1996@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220411203133.19929-1-jagathjog1996@gmail.com> References: <20220411203133.19929-1-jagathjog1996@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Add support for activity recognition like STILL, WALKING, RUNNING and these events are pushed to the userspace whenever the STEP interrupt occurs. Signed-off-by: Jagath Jog J --- drivers/iio/accel/bma400_core.c | 104 ++++++++++++++++++++++++++++++++ 1 file changed, 104 insertions(+) diff --git a/drivers/iio/accel/bma400_core.c b/drivers/iio/accel/bma400_core.c index 37f38626a9aa..69d2caa4ed18 100644 --- a/drivers/iio/accel/bma400_core.c +++ b/drivers/iio/accel/bma400_core.c @@ -59,6 +59,12 @@ struct bma400_sample_freq { int uhz; }; +enum bma400_activity { + BMA400_STILL, + BMA400_WALKING, + BMA400_RUNNING, +}; + struct bma400_data { struct device *dev; struct regmap *regmap; @@ -72,6 +78,7 @@ struct bma400_data { struct iio_trigger *trig; int steps_enabled; bool step_event_en; + bool activity_event_en; /* Correct time stamp alignment */ struct { __le16 buff[3]; @@ -175,6 +182,12 @@ static const struct iio_event_spec bma400_step_detect_event = { .mask_separate = BIT(IIO_EV_INFO_ENABLE), }; +static const struct iio_event_spec bma400_activity_event = { + .type = IIO_EV_TYPE_CHANGE, + .dir = IIO_EV_DIR_NONE, + .mask_shared_by_type = BIT(IIO_EV_INFO_ENABLE), +}; + #define BMA400_ACC_CHANNEL(_index, _axis) { \ .type = IIO_ACCEL, \ .modified = 1, \ @@ -196,6 +209,16 @@ static const struct iio_event_spec bma400_step_detect_event = { }, \ } +#define BMA400_ACTIVITY_CHANNEL(_chan2) { \ + .type = IIO_ACTIVITY, \ + .modified = 1, \ + .channel2 = _chan2, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \ + .scan_index = -1, /* No buffer support */ \ + .event_spec = &bma400_activity_event, \ + .num_event_specs = 1, \ +} + static const struct iio_chan_spec bma400_channels[] = { BMA400_ACC_CHANNEL(0, X), BMA400_ACC_CHANNEL(1, Y), @@ -220,6 +243,9 @@ static const struct iio_chan_spec bma400_channels[] = { .event_spec = &bma400_step_detect_event, .num_event_specs = 1, }, + BMA400_ACTIVITY_CHANNEL(IIO_MOD_STILL), + BMA400_ACTIVITY_CHANNEL(IIO_MOD_WALKING), + BMA400_ACTIVITY_CHANNEL(IIO_MOD_RUNNING), IIO_CHAN_SOFT_TIMESTAMP(4), }; @@ -626,6 +652,20 @@ static void bma400_power_disable(void *data_ptr) ERR_PTR(ret)); } +static enum iio_modifier bma400_act_to_mod(enum bma400_activity activity) +{ + switch (activity) { + case BMA400_STILL: + return IIO_MOD_STILL; + case BMA400_WALKING: + return IIO_MOD_WALKING; + case BMA400_RUNNING: + return IIO_MOD_RUNNING; + default: + return IIO_NO_MOD; + } +} + static int bma400_init(struct bma400_data *data) { unsigned int val; @@ -725,6 +765,7 @@ static int bma400_read_raw(struct iio_dev *indio_dev, struct bma400_data *data = iio_priv(indio_dev); int ret; u8 steps_raw[3]; + unsigned int activity; switch (mask) { case IIO_CHAN_INFO_PROCESSED: @@ -743,6 +784,23 @@ static int bma400_read_raw(struct iio_dev *indio_dev, return ret; *val = get_unaligned_le24(steps_raw); return IIO_VAL_INT; + case IIO_ACTIVITY: + mutex_lock(&data->mutex); + ret = regmap_read(data->regmap, BMA400_STEP_STAT_REG, + &activity); + mutex_unlock(&data->mutex); + if (ret) + return ret; + /* + * The device does not support confidence value levels, + * so we will always have 100% for current activity and + * 0% for the others. + */ + if (chan->channel2 == bma400_act_to_mod(activity)) + *val = 100; + else + *val = 0; + return IIO_VAL_INT; default: return -EINVAL; } @@ -898,6 +956,8 @@ static int bma400_read_event_config(struct iio_dev *indio_dev, switch (chan->type) { case IIO_STEPS: return data->step_event_en; + case IIO_ACTIVITY: + return data->activity_event_en; default: return -EINVAL; } @@ -937,6 +997,32 @@ static int bma400_write_event_config(struct iio_dev *indio_dev, return ret; data->step_event_en = state; return 0; + case IIO_ACTIVITY: + if (!data->step_event_en) { + mutex_lock(&data->mutex); + ret = regmap_update_bits(data->regmap, + BMA400_INT_CONFIG1_REG, + BMA400_STEP_INT_MSK, + FIELD_PREP(BMA400_STEP_INT_MSK, + 1)); + if (ret) { + mutex_unlock(&data->mutex); + return ret; + } + data->steps_enabled = 1; + + ret = regmap_update_bits(data->regmap, + BMA400_INT12_MAP_REG, + BMA400_STEP_INT_MSK, + FIELD_PREP(BMA400_STEP_INT_MSK, + 1)); + mutex_unlock(&data->mutex); + if (ret) + return ret; + data->step_event_en = 1; + } + data->activity_event_en = state; + return 0; default: return -EINVAL; } @@ -1015,6 +1101,7 @@ static irqreturn_t bma400_interrupt(int irq, void *private) s64 timestamp = iio_get_time_ns(indio_dev); int ret; __le16 status; + unsigned int act; mutex_lock(&data->mutex); ret = regmap_bulk_read(data->regmap, BMA400_INT_STAT0_REG, &status, @@ -1029,6 +1116,23 @@ static irqreturn_t bma400_interrupt(int irq, void *private) IIO_EV_DIR_NONE, IIO_EV_TYPE_CHANGE, 0, 0, 0), timestamp); + + if (data->activity_event_en) { + mutex_lock(&data->mutex); + ret = regmap_read(data->regmap, BMA400_STEP_STAT_REG, + &act); + mutex_unlock(&data->mutex); + if (ret) + return IRQ_NONE; + + iio_push_event(indio_dev, + IIO_EVENT_CODE(IIO_ACTIVITY, 0, + bma400_act_to_mod(act), + IIO_EV_DIR_NONE, + IIO_EV_TYPE_CHANGE, 0, + 0, 0), + timestamp); + } return IRQ_HANDLED; }