From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 25633C55199 for ; Mon, 27 Apr 2020 09:56:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EF187206B8 for ; Mon, 27 Apr 2020 09:56:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="qLKqNC3/" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727022AbgD0J4V (ORCPT ); Mon, 27 Apr 2020 05:56:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47954 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726987AbgD0J4P (ORCPT ); Mon, 27 Apr 2020 05:56:15 -0400 Received: from mail-wr1-x443.google.com (mail-wr1-x443.google.com [IPv6:2a00:1450:4864:20::443]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D6794C0610D6; Mon, 27 Apr 2020 02:56:14 -0700 (PDT) Received: by mail-wr1-x443.google.com with SMTP id x17so19030358wrt.5; Mon, 27 Apr 2020 02:56:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=PH9/kg06+2g1PzLkf4bms6TR9ZCbox19VZJIILVMke0=; b=qLKqNC3/mvS7cTXmG9UIyX3ARlChbY9SfLOXb+5wkLSqbC8do/Zu7dYipL8dL4RwXN gHZkZ5lMq3IJOzuWX7xSxJBcpPAuBBF+Hd0PKfoNEiCb6fIsU1gi3bWmbJ5Zz4/Fbuyi k9b9qc1oGHKc3q08pl8dF/i754qTmOW6uNJ+QpDX0N+OK8lJd2OZO4//+VEmlL4akE1/ /tZxrkvH7wwtkUNDoSvNdXpB+C5g+WOU5VBE+syGbIW0zU+LEGLgeu3cJsHNWApX1A+u UVY0uuG5SK9ANmqnQIzxEvQcyPm00e1xZksDRilcVlFWee0CGj/zaqKtm3vS9P82rj51 mXEw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=PH9/kg06+2g1PzLkf4bms6TR9ZCbox19VZJIILVMke0=; b=mAT2pUgnfQzSFgIiJW94+61S9oi2/COMpLkdzZEaF9a+riJzKSV9qas5PgkCMym29v XK99Gbk5RvalbelJSKkp13YTmuEzLgWpZBntXzpk1lJwju/Lohk74PjabxoCIgnj+Kw+ YvkjTxmdALuQP/o5FNWOPw4EkTOjEEZ1tfKj22IVurPAegLPAfIUtokNl/t/DISaphnS ZumH6YpFd6DQTMRtuq+c3dchaVnfZyVdT3c4s0zfDZVCzk3ayJG6zzGe6xuWql43sYSg LJqSkXRpIvJQwOhIh+aX3zJXDLSt7Gp8Dc5jjXa4htcrDB2HapQ96nA9MN2QXb9BzFdd vpBQ== X-Gm-Message-State: AGi0PubFoVKIdhTUCViynN366dh119/ZNbvdSptoMNjiosRB1BQBIVYG LTuaWOazeeF6RXoAcZjLA8w= X-Google-Smtp-Source: APiQypIkK75Dewcg070W6zJdz411HOfUifdDDx4/rv7ZiJtLdSU0OT73ybktUPodfwolfZ4vCzEVTg== X-Received: by 2002:adf:80ee:: with SMTP id 101mr27259644wrl.156.1587981373598; Mon, 27 Apr 2020 02:56:13 -0700 (PDT) Received: from meru.fronius.com ([2a01:cb18:832e:5f00:7069:9b5d:ebe2:85b8]) by smtp.gmail.com with ESMTPSA id y10sm14487606wma.5.2020.04.27.02.56.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Apr 2020 02:56:13 -0700 (PDT) From: Mathieu Othacehe 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, Mathieu Othacehe Subject: [PATCH v6 5/5] iio: vcnl4000: Add buffer support for VCNL4010/20. Date: Mon, 27 Apr 2020 11:55:59 +0200 Message-Id: <20200427095559.16131-6-m.othacehe@gmail.com> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200427095559.16131-1-m.othacehe@gmail.com> References: <20200427095559.16131-1-m.othacehe@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The VCNL4010 and VCNL4020 chips are able to raise interrupts on data ready. Use it to provide triggered buffer support for proximity data. Those two chips also provide ambient light data. However, they are sampled at different rate than proximity data. As this is not handled by the IIO framework for now, and the sample frequencies of ambient light data are very low, do add buffer support for them. Signed-off-by: Mathieu Othacehe --- drivers/iio/light/Kconfig | 2 + drivers/iio/light/vcnl4000.c | 161 ++++++++++++++++++++++++++++++++++- 2 files changed, 161 insertions(+), 2 deletions(-) diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig index 74970f18a93b..05f61b1e223a 100644 --- a/drivers/iio/light/Kconfig +++ b/drivers/iio/light/Kconfig @@ -506,6 +506,8 @@ config US5182D config VCNL4000 tristate "VCNL4000/4010/4020/4200 combined ALS and proximity sensor" + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER depends on I2C help Say Y here if you want to build a driver for the Vishay VCNL4000, diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c index 65c0cf2b5037..5f3cc422c371 100644 --- a/drivers/iio/light/vcnl4000.c +++ b/drivers/iio/light/vcnl4000.c @@ -5,6 +5,7 @@ * * Copyright 2012 Peter Meerwald * Copyright 2019 Pursim SPC + * Copyright 2020 Mathieu Othacehe * * IIO driver for: * VCNL4000/10/20 (7-bit I2C slave address 0x13) @@ -13,8 +14,7 @@ * * TODO: * allow to adjust IR current - * periodic ALS/proximity measurement (VCNL4010/20) - * interrupts (VCNL4010/20/40, VCNL4200) + * interrupts (VCNL4040, VCNL4200) */ #include @@ -24,9 +24,13 @@ #include #include +#include #include #include #include +#include +#include +#include #define VCNL4000_DRV_NAME "vcnl4000" #define VCNL4000_PROD_ID 0x01 @@ -771,17 +775,26 @@ static const struct iio_chan_spec vcnl4000_channels[] = { static const struct iio_chan_spec vcnl4010_channels[] = { { .type = IIO_LIGHT, + .scan_index = -1, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), }, { .type = IIO_PROXIMITY, + .scan_index = 0, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SAMP_FREQ), .info_mask_separate_available = BIT(IIO_CHAN_INFO_SAMP_FREQ), .event_spec = vcnl4000_event_spec, .num_event_specs = ARRAY_SIZE(vcnl4000_event_spec), .ext_info = vcnl4000_ext_info, + .scan_type = { + .sign = 'u', + .realbits = 16, + .storagebits = 16, + .endianness = IIO_CPU, + }, }, + IIO_CHAN_SOFT_TIMESTAMP(1), }; static const struct iio_info vcnl4000_info = { @@ -883,10 +896,139 @@ static irqreturn_t vcnl4010_irq_thread(int irq, void *p) isr & VCNL4010_INT_THR); } + if (isr & VCNL4010_INT_DRDY && iio_buffer_enabled(indio_dev)) + iio_trigger_poll_chained(indio_dev->trig); + end: return IRQ_HANDLED; } +static irqreturn_t vcnl4010_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct vcnl4000_data *data = iio_priv(indio_dev); + const unsigned long *active_scan_mask = indio_dev->active_scan_mask; + u16 buffer[8] = {0}; /* 1x16-bit + ts */ + bool data_read = false; + unsigned long isr; + int val = 0; + int ret; + + ret = i2c_smbus_read_byte_data(data->client, VCNL4010_ISR); + if (ret < 0) + goto end; + + isr = ret; + + if (test_bit(0, active_scan_mask)) { + if (test_bit(VCNL4010_INT_PROXIMITY, &isr)) { + ret = vcnl4000_read_data(data, + VCNL4000_PS_RESULT_HI, + &val); + if (ret < 0) + goto end; + + buffer[0] = val; + data_read = true; + } + } + + ret = i2c_smbus_write_byte_data(data->client, VCNL4010_ISR, + isr & VCNL4010_INT_DRDY); + if (ret < 0) + goto end; + + if (!data_read) + goto end; + + iio_push_to_buffers_with_timestamp(indio_dev, buffer, + iio_get_time_ns(indio_dev)); + +end: + iio_trigger_notify_done(indio_dev->trig); + return IRQ_HANDLED; +} + +static int vcnl4010_buffer_postenable(struct iio_dev *indio_dev) +{ + struct vcnl4000_data *data = iio_priv(indio_dev); + int ret; + int cmd; + + ret = iio_triggered_buffer_postenable(indio_dev); + if (ret) + return ret; + + /* Do not enable the buffer if we are already capturing events. */ + if (vcnl4010_is_in_periodic_mode(data)) { + ret = -EBUSY; + goto end; + } + + ret = i2c_smbus_write_byte_data(data->client, VCNL4010_INT_CTRL, + VCNL4010_INT_PROX_EN); + if (ret < 0) + goto end; + + cmd = VCNL4000_SELF_TIMED_EN | VCNL4000_PROX_EN; + ret = i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND, cmd); + if (ret < 0) + goto end; + +end: + if (ret < 0) + iio_triggered_buffer_predisable(indio_dev); + + return ret; +} + +static int vcnl4010_buffer_predisable(struct iio_dev *indio_dev) +{ + struct vcnl4000_data *data = iio_priv(indio_dev); + int ret, ret_disable; + + ret = i2c_smbus_write_byte_data(data->client, VCNL4010_INT_CTRL, 0); + if (ret < 0) + goto end; + + ret = i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND, 0); + +end: + ret_disable = iio_triggered_buffer_predisable(indio_dev); + if (ret == 0) + ret = ret_disable; + + return ret; +} + +static const struct iio_buffer_setup_ops vcnl4010_buffer_ops = { + .postenable = &vcnl4010_buffer_postenable, + .predisable = &vcnl4010_buffer_predisable, +}; + +static const struct iio_trigger_ops vcnl4010_trigger_ops = { + .validate_device = iio_trigger_validate_own_device, +}; + +static int vcnl4010_probe_trigger(struct iio_dev *indio_dev) +{ + struct vcnl4000_data *data = iio_priv(indio_dev); + struct i2c_client *client = data->client; + struct iio_trigger *trigger; + + trigger = devm_iio_trigger_alloc(&client->dev, "%s-dev%d", + indio_dev->name, indio_dev->id); + if (!trigger) + return -ENOMEM; + + trigger->dev.parent = &client->dev; + trigger->ops = &vcnl4010_trigger_ops; + iio_trigger_set_drvdata(trigger, indio_dev); + + return devm_iio_trigger_register(&client->dev, trigger); +} + static int vcnl4000_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -923,6 +1065,16 @@ static int vcnl4000_probe(struct i2c_client *client, indio_dev->modes = INDIO_DIRECT_MODE; if (client->irq && data->chip_spec->irq_support) { + ret = devm_iio_triggered_buffer_setup(&client->dev, indio_dev, + NULL, + vcnl4010_trigger_handler, + &vcnl4010_buffer_ops); + if (ret < 0) { + dev_err(&client->dev, + "unable to setup iio triggered buffer\n"); + return ret; + } + ret = devm_request_threaded_irq(&client->dev, client->irq, NULL, vcnl4010_irq_thread, IRQF_TRIGGER_FALLING | @@ -933,6 +1085,10 @@ static int vcnl4000_probe(struct i2c_client *client, dev_err(&client->dev, "irq request failed\n"); return ret; } + + ret = vcnl4010_probe_trigger(indio_dev); + if (ret < 0) + return ret; } ret = pm_runtime_set_active(&client->dev); @@ -1028,5 +1184,6 @@ static struct i2c_driver vcnl4000_driver = { module_i2c_driver(vcnl4000_driver); MODULE_AUTHOR("Peter Meerwald "); +MODULE_AUTHOR("Mathieu Othacehe "); MODULE_DESCRIPTION("Vishay VCNL4000 proximity/ambient light sensor driver"); MODULE_LICENSE("GPL"); -- 2.26.0