From patchwork Thu May 5 13:30:18 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: 12839565 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 4BE43C433F5 for ; Thu, 5 May 2022 13:30:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1379633AbiEENe0 (ORCPT ); Thu, 5 May 2022 09:34:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45970 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1379637AbiEENeX (ORCPT ); Thu, 5 May 2022 09:34:23 -0400 Received: from mail-pj1-x1034.google.com (mail-pj1-x1034.google.com [IPv6:2607:f8b0:4864:20::1034]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C99BC1277A; Thu, 5 May 2022 06:30:43 -0700 (PDT) Received: by mail-pj1-x1034.google.com with SMTP id o69so4212964pjo.3; Thu, 05 May 2022 06:30:43 -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=H3CkS7Q8uU7MubL4PY7f/qf/85uW9+5JcXDuS6dbHMY=; b=JdYhrJb7mX4+734N1IXgMszUeEgx+WAZ2dR/lmjVqsOUxKkXoaW4Iy20gkxFEhmK8a Y2mTRea2gb7hXAIbVnXKYhy2ubYDAORsCIAiStuy1ctHsn/Ni2RB4nwlnqW37tphhdR3 v6TUqoUpG/CMbJK0S7PqYfNe6Zu7+WZaxzuzUIHu1ZxW/2gjxZTdMqR0pI7Xt8IuONey oRhKBWejpMxipqyuZduPqYKs8ZzlKpl42w0PiT5bFY4HUWUAOCLpZEHEUv8od5DCkapa 2EKRk5gd6zB9Tw++E9Rh0+afGFYAJPFNa2uyp+EqZYAuZYDGKrGCafFNtJBRHLSERztr 0I/g== 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=H3CkS7Q8uU7MubL4PY7f/qf/85uW9+5JcXDuS6dbHMY=; b=QDSZdbADsTyFu2OBAV1ifB/Hag09nHOP5ZloAQAivflrDVYyVmAzb4bbGJg0ztncH9 Q3XnYqw8IKbpUJ/cZHNQwTlfAD/Cxv5CCPFy76xpmv2PBJSKfZJs+eyVUjBM/zvE5SLs Un+nVyq6MIgnc69yD3yjTu5HZ+0CtyDTlp9DmuYAopNHC6tUka5f58diCRYTxE6VYH7k QB/FawL1+JZYtCpxCvUsVmVUx9UP/9AYi4EP545LR2O72QDVuCWT0FTt/Vyv4ch2bcpI Hx3zkaGX908AfBfryopKK+rLE11t+l8q/Rz2hSBqUeLrmZuOX0FaZEJuRYEpF0R13gp/ KRzw== X-Gm-Message-State: AOAM532f9bLUFmKS2YiqLfWUFXhoEXLRTFYb+qi803D8cv/XwZqEkE5h DTSZkfsJ49JYFNlwlhAI57M= X-Google-Smtp-Source: ABdhPJwT2CcSIvf96nOivNSJyRdg9I1448OecKUqWeJk+vGTypo1FQfJDjUL8VIZwDuHM/qkW0y8og== X-Received: by 2002:a17:90a:a393:b0:1d0:e448:811d with SMTP id x19-20020a17090aa39300b001d0e448811dmr6274218pjp.97.1651757443035; Thu, 05 May 2022 06:30:43 -0700 (PDT) Received: from localhost.localdomain ([115.99.184.228]) by smtp.gmail.com with ESMTPSA id c64-20020a624e43000000b0050dc7628135sm1420120pfb.15.2022.05.05.06.30.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 May 2022 06:30:42 -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 v5 07/10] iio: accel: bma400: Add activity recognition support Date: Thu, 5 May 2022 19:00:18 +0530 Message-Id: <20220505133021.22362-8-jagathjog1996@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220505133021.22362-1-jagathjog1996@gmail.com> References: <20220505133021.22362-1-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 | 85 +++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) diff --git a/drivers/iio/accel/bma400_core.c b/drivers/iio/accel/bma400_core.c index 50932fc1c854..1e4923064b63 100644 --- a/drivers/iio/accel/bma400_core.c +++ b/drivers/iio/accel/bma400_core.c @@ -67,6 +67,12 @@ struct bma400_sample_freq { int uhz; }; +enum bma400_activity { + BMA400_STILL, + BMA400_WALKING, + BMA400_RUNNING, +}; + struct bma400_data { struct device *dev; struct regmap *regmap; @@ -80,6 +86,7 @@ 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]; @@ -184,6 +191,12 @@ 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, \ @@ -205,6 +218,16 @@ 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), @@ -229,6 +252,9 @@ 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), }; @@ -669,6 +695,20 @@ 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; @@ -766,6 +806,7 @@ static int bma400_read_raw(struct iio_dev *indio_dev, int *val2, long mask) { struct bma400_data *data = iio_priv(indio_dev); + unsigned int activity; int ret; switch (mask) { @@ -778,6 +819,21 @@ 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; } @@ -927,6 +983,8 @@ 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; } @@ -964,6 +1022,18 @@ 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; } @@ -1049,6 +1119,7 @@ static irqreturn_t bma400_interrupt(int irq, void *private) struct iio_dev *indio_dev = private; struct bma400_data *data = iio_priv(indio_dev); s64 timestamp = iio_get_time_ns(indio_dev); + unsigned int act; int ret; /* Lock to protect the data->status */ @@ -1069,6 +1140,20 @@ static irqreturn_t bma400_interrupt(int irq, void *private) IIO_EV_TYPE_CHANGE, IIO_EV_DIR_NONE), 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_MOD_EVENT_CODE(IIO_ACTIVITY, 0, + bma400_act_to_mod(act), + IIO_EV_TYPE_CHANGE, + IIO_EV_DIR_NONE), + timestamp); + } } if (FIELD_GET(BMA400_INT_DRDY_MSK, le16_to_cpu(data->status))) {