From patchwork Wed Apr 20 21:11:03 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: 12820828 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 A1033C433F5 for ; Wed, 20 Apr 2022 21:11:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1382422AbiDTVOY (ORCPT ); Wed, 20 Apr 2022 17:14:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52718 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1382376AbiDTVOW (ORCPT ); Wed, 20 Apr 2022 17:14:22 -0400 Received: from mail-pf1-x42d.google.com (mail-pf1-x42d.google.com [IPv6:2607:f8b0:4864:20::42d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C514C4831B; Wed, 20 Apr 2022 14:11:24 -0700 (PDT) Received: by mail-pf1-x42d.google.com with SMTP id z16so3111628pfh.3; Wed, 20 Apr 2022 14:11:24 -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=tZQUlUpggsqshIBZIEqFH3v1VH36ZYRjLjiMyZLTFwc=; b=bnf14GjVBIGcHhC+P3YgPJtQ1Z/pXD69S2oSQTrUnVzsdeNgHz926H932krAynjflv qVNTrsTWpgluDCt9c/m1cp2dGxsFb76JYH37fgnvtSoVzHnvy8v/8rADT1smUT2C8XxW QoI21m2psVOFxXBgTA92vAw+6FwKLj+UjwM+8J0tKjzDNs/h99gZKv2Rs+BPdMcnCRiI sxreCvg8Oa+YK4xU/DkEx8p7QPVgjIiIxQcNGnLtKsOdKSjuCiseUqGn8KExJODFcMhJ lJq9fhVB220rlQ2vMCyzj++a5w/CnjjgiiZNRLbXG51aKYGfHUEJiuNR0nCs5NN52qgK kLNg== 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=tZQUlUpggsqshIBZIEqFH3v1VH36ZYRjLjiMyZLTFwc=; b=RKJWDzYfFXyOM9B6Jcbd0MohrPJyWZ+qd29u4SGvKBDYTccOqQtKQc5REefTmvAgVH jK+WgWjjo6/3eerIpT5PGwqotHpxpNR5SDxrRw1cr5aUamNPjHJ8T/t5pfm9m9okKiGc cAMws79lPpZBR+gz8ERwlJf0Qp/L6bXeTWjpxEM/O9h5uBIxfabGIUdJfqzFwKPpmrTU gAq+Jzzig278bOP+f2M7lzo331VVCO83fQssQaZgAnq4vso6HJtwYGvJ6t5OtQpn0ZDJ Yv7Oh8rVMQpPc+ysrmuIY93zaLsFeR4lg7PEs5r4Bo5gfUMFYiPQ8xhJCYMA0U6Rj7N5 cNlQ== X-Gm-Message-State: AOAM532fKec3NFLZUmwziZBF+I9HLY/YE2HYmrK55onktu9bsdSde2Xl Qm05tIhq83c9clBadm3Y08Y= X-Google-Smtp-Source: ABdhPJy+5y/C5QWAesVuAENR/MyABQBJtQ0Wtcxo39iM2N3+7MhJ1wJmOddd5UmFwGw/cWzvRw2mKw== X-Received: by 2002:a05:6a02:182:b0:374:5a57:cbf9 with SMTP id bj2-20020a056a02018200b003745a57cbf9mr20561451pgb.616.1650489084290; Wed, 20 Apr 2022 14:11:24 -0700 (PDT) Received: from localhost.localdomain ([27.7.104.83]) by smtp.gmail.com with ESMTPSA id v13-20020a17090a00cd00b001cd4989fee4sm106652pjd.48.2022.04.20.14.11.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Apr 2022 14:11:24 -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 v4 7/9] iio: accel: bma400: Add activity recognition support Date: Thu, 21 Apr 2022 02:41:03 +0530 Message-Id: <20220420211105.14654-8-jagathjog1996@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220420211105.14654-1-jagathjog1996@gmail.com> References: <20220420211105.14654-1-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 | 86 +++++++++++++++++++++++++++++++++ 1 file changed, 86 insertions(+) diff --git a/drivers/iio/accel/bma400_core.c b/drivers/iio/accel/bma400_core.c index fe101df7b773..073fff7d64a3 100644 --- a/drivers/iio/accel/bma400_core.c +++ b/drivers/iio/accel/bma400_core.c @@ -60,6 +60,12 @@ struct bma400_sample_freq { int uhz; }; +enum bma400_activity { + BMA400_STILL, + BMA400_WALKING, + BMA400_RUNNING, +}; + struct bma400_data { struct device *dev; struct regmap *regmap; @@ -73,6 +79,7 @@ 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]; @@ -177,6 +184,12 @@ 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, \ @@ -198,6 +211,16 @@ 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), @@ -222,6 +245,9 @@ 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), }; @@ -660,6 +686,20 @@ 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; @@ -758,6 +798,7 @@ static int bma400_read_raw(struct iio_dev *indio_dev, { struct bma400_data *data = iio_priv(indio_dev); int ret; + unsigned int activity; switch (mask) { case IIO_CHAN_INFO_PROCESSED: @@ -769,6 +810,21 @@ static int bma400_read_raw(struct iio_dev *indio_dev, return ret; case IIO_STEPS: return bma400_get_steps_reg(data, val); + case IIO_ACTIVITY: + ret = regmap_read(data->regmap, BMA400_STEP_STAT_REG, + &activity); + 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; } @@ -918,6 +974,8 @@ 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; } @@ -955,6 +1013,18 @@ static int bma400_write_event_config(struct iio_dev *indio_dev, ret = bma400_steps_event_enable(data, state); mutex_unlock(&data->mutex); return ret; + case IIO_ACTIVITY: + mutex_lock(&data->mutex); + if (!data->step_event_en) { + ret = bma400_steps_event_enable(data, true); + if (ret) { + mutex_unlock(&data->mutex); + return ret; + } + } + data->activity_event_en = state; + mutex_unlock(&data->mutex); + return 0; default: return -EINVAL; } @@ -1037,6 +1107,7 @@ static irqreturn_t bma400_interrupt(int irq, void *private) struct bma400_data *data = iio_priv(indio_dev); s64 timestamp = iio_get_time_ns(indio_dev); int ret; + unsigned int act; /* Lock to protect the data->status */ mutex_lock(&data->mutex); @@ -1052,6 +1123,21 @@ 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) { + ret = regmap_read(data->regmap, BMA400_STEP_STAT_REG, + &act); + if (ret) + goto unlock_err; + + 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); + } mutex_unlock(&data->mutex); return IRQ_HANDLED; }