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[23.128.96.18]) by mx.google.com with ESMTP id t26si18067844ioj.103.2021.07.24.08.06.31; Sat, 24 Jul 2021 08:06:43 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229786AbhGXOY4 (ORCPT + 99 others); Sat, 24 Jul 2021 10:24:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:34442 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229545AbhGXOY4 (ORCPT ); Sat, 24 Jul 2021 10:24:56 -0400 Received: from jic23-huawei (cpc108967-cmbg20-2-0-cust86.5-4.cable.virginm.net [81.101.6.87]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CEBF160E9C; Sat, 24 Jul 2021 15:05:25 +0000 (UTC) Date: Sat, 24 Jul 2021 16:07:56 +0100 From: Jonathan Cameron To: Ivan Mikhaylov Cc: Lars-Peter Clausen , Peter Meerwald-Stadler , , , kernel test robot Subject: Re: [PATCH v5 2/3] iio: proximity: vcnl3020: add periodic mode Message-ID: <20210724160756.41a782e2@jic23-huawei> In-Reply-To: <20210722154420.915082-3-i.mikhaylov@yadro.com> References: <20210722154420.915082-1-i.mikhaylov@yadro.com> <20210722154420.915082-3-i.mikhaylov@yadro.com> X-Mailer: Claws Mail 3.18.0 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 22 Jul 2021 18:44:19 +0300 Ivan Mikhaylov wrote: > Add the possibility to run proximity sensor in periodic measurement > mode with thresholds. > > Reported-by: kernel test robot A reported by in a patch that isn't obviously a fix should really have a comment to explain what was reported. It definitely wasn't the lack of interrupt support in the driver! Assuming I take this without a v6 I'll add a note that it was a repeated include. > Signed-off-by: Ivan Mikhaylov > --- > drivers/iio/proximity/vcnl3020.c | 318 ++++++++++++++++++++++++++++++- > 1 file changed, 315 insertions(+), 3 deletions(-) > > diff --git a/drivers/iio/proximity/vcnl3020.c b/drivers/iio/proximity/vcnl3020.c > index c90f9c6e9e97..6d724657677a 100644 > --- a/drivers/iio/proximity/vcnl3020.c > +++ b/drivers/iio/proximity/vcnl3020.c > @@ -2,8 +2,6 @@ > /* > * Support for Vishay VCNL3020 proximity sensor on i2c bus. > * Based on Vishay VCNL4000 driver code. > - * > - * TODO: interrupts. > */ > > #include > @@ -11,9 +9,10 @@ > #include > #include > #include > +#include > > #include > -#include > +#include > > #define VCNL3020_PROD_ID 0x21 > > @@ -37,6 +36,21 @@ > * measurement > */ > > +/* Enables periodic proximity measurement */ > +#define VCNL_PS_EN BIT(1) > + > +/* Enables state machine and LP oscillator for self timed measurements */ > +#define VCNL_PS_SELFTIMED_EN BIT(0) > + > +/* Bit masks for ICR */ > + > +/* Enable interrupts on low or high thresholds */ > +#define VCNL_ICR_THRES_EN BIT(1) > + > +/* Bit masks for ISR */ > +#define VCNL_INT_TH_HI BIT(0) /* High threshold hit */ > +#define VCNL_INT_TH_LOW BIT(1) /* Low threshold hit */ > + > #define VCNL_ON_DEMAND_TIMEOUT_US 100000 > #define VCNL_POLL_US 20000 > > @@ -142,6 +156,21 @@ static int vcnl3020_init(struct vcnl3020_data *data) > vcnl3020_led_current_property); > }; > > +static bool vcnl3020_is_in_periodic_mode(struct vcnl3020_data *data) > +{ > + int rc; > + unsigned int cmd; > + > + rc = regmap_read(data->regmap, VCNL_COMMAND, &cmd); > + if (rc) { > + dev_err(data->dev, > + "Error (%d) reading command register\n", rc); > + return false; > + } > + > + return !!(cmd & VCNL_PS_SELFTIMED_EN); > +} > + > static int vcnl3020_measure_proximity(struct vcnl3020_data *data, int *val) > { > int rc; > @@ -149,6 +178,12 @@ static int vcnl3020_measure_proximity(struct vcnl3020_data *data, int *val) > > mutex_lock(&data->lock); > > + /* Protect against event capture. */ > + if (vcnl3020_is_in_periodic_mode(data)) { > + rc = -EBUSY; > + goto err_unlock; > + } > + > rc = regmap_write(data->regmap, VCNL_COMMAND, VCNL_PS_OD); > if (rc) > goto err_unlock; > @@ -202,6 +237,10 @@ static int vcnl3020_write_proxy_samp_freq(struct vcnl3020_data *data, int val, > unsigned int i; > int index = -1; > > + /* Protect against event capture. */ > + if (vcnl3020_is_in_periodic_mode(data)) > + return -EBUSY; > + > for (i = 0; i < ARRAY_SIZE(vcnl3020_prox_sampling_frequency); i++) { > if (val == vcnl3020_prox_sampling_frequency[i][0] && > val2 == vcnl3020_prox_sampling_frequency[i][1]) { > @@ -216,12 +255,234 @@ static int vcnl3020_write_proxy_samp_freq(struct vcnl3020_data *data, int val, > return regmap_write(data->regmap, VCNL_PROXIMITY_RATE, index); > } > > +static bool vcnl3020_is_thr_enabled(struct vcnl3020_data *data) > +{ > + int rc; > + unsigned int icr; > + > + rc = regmap_read(data->regmap, VCNL_PS_ICR, &icr); > + if (rc) { > + dev_err(data->dev, > + "Error (%d) reading ICR register\n", rc); > + return false; > + } > + > + return !!(icr & VCNL_ICR_THRES_EN); > +} > + > +static int vcnl3020_read_event(struct iio_dev *indio_dev, > + const struct iio_chan_spec *chan, > + enum iio_event_type type, > + enum iio_event_direction dir, > + enum iio_event_info info, > + int *val, int *val2) > +{ > + int rc; > + struct vcnl3020_data *data = iio_priv(indio_dev); > + > + switch (info) { > + case IIO_EV_INFO_VALUE: > + switch (dir) { > + case IIO_EV_DIR_RISING: > + rc = regmap_bulk_read(data->regmap, VCNL_PS_HI_THR_HI, > + &data->buf, sizeof(data->buf)); > + if (rc < 0) > + return rc; > + *val = be16_to_cpu(data->buf); > + return IIO_VAL_INT; > + case IIO_EV_DIR_FALLING: > + rc = regmap_bulk_read(data->regmap, VCNL_PS_LO_THR_HI, > + &data->buf, sizeof(data->buf)); > + if (rc < 0) > + return rc; > + *val = be16_to_cpu(data->buf); > + return IIO_VAL_INT; > + default: > + return -EINVAL; > + } > + default: > + return -EINVAL; > + } > +} > + > +static int vcnl3020_write_event(struct iio_dev *indio_dev, > + const struct iio_chan_spec *chan, > + enum iio_event_type type, > + enum iio_event_direction dir, > + enum iio_event_info info, > + int val, int val2) > +{ > + int rc; > + struct vcnl3020_data *data = iio_priv(indio_dev); > + > + mutex_lock(&data->lock); > + > + switch (info) { > + case IIO_EV_INFO_VALUE: > + switch (dir) { > + case IIO_EV_DIR_RISING: > + /* 16 bit word/ low * high */ > + data->buf = cpu_to_be16(val); > + rc = regmap_bulk_write(data->regmap, VCNL_PS_HI_THR_HI, > + &data->buf, sizeof(data->buf)); > + if (rc < 0) > + goto err_unlock; > + rc = IIO_VAL_INT; > + goto err_unlock; > + case IIO_EV_DIR_FALLING: > + data->buf = cpu_to_be16(val); > + rc = regmap_bulk_write(data->regmap, VCNL_PS_LO_THR_HI, > + &data->buf, sizeof(data->buf)); > + if (rc < 0) > + goto err_unlock; > + rc = IIO_VAL_INT; > + goto err_unlock; > + default: > + rc = -EINVAL; > + goto err_unlock; > + } > + default: > + rc = -EINVAL; > + goto err_unlock; > + } > +err_unlock: > + mutex_unlock(&data->lock); > + > + return rc; > +} > + > +static int vcnl3020_enable_periodic(struct iio_dev *indio_dev, > + struct vcnl3020_data *data) > +{ > + int rc; > + int cmd; > + > + mutex_lock(&data->lock); > + > + /* Enable periodic measurement of proximity data. */ > + cmd = VCNL_PS_EN | VCNL_PS_SELFTIMED_EN; > + > + rc = regmap_write(data->regmap, VCNL_COMMAND, cmd); > + if (rc) { > + dev_err(data->dev, > + "Error (%d) writing command register\n", rc); > + goto err_unlock; > + } > + > + /* > + * Enable interrupts on threshold, for proximity data by > + * default. > + */ > + rc = regmap_write(data->regmap, VCNL_PS_ICR, VCNL_ICR_THRES_EN); > + if (rc) > + dev_err(data->dev, > + "Error (%d) reading ICR register\n", rc); > + > +err_unlock: > + mutex_unlock(&data->lock); > + > + return rc; > +} > + > +static int vcnl3020_disable_periodic(struct iio_dev *indio_dev, > + struct vcnl3020_data *data) > +{ > + int rc; > + > + mutex_lock(&data->lock); > + > + rc = regmap_write(data->regmap, VCNL_COMMAND, 0); > + if (rc) { > + dev_err(data->dev, > + "Error (%d) writing command register\n", rc); > + goto err_unlock; > + } > + > + rc = regmap_write(data->regmap, VCNL_PS_ICR, 0); > + if (rc) { > + dev_err(data->dev, > + "Error (%d) writing ICR register\n", rc); > + goto err_unlock; > + } > + > + /* Clear interrupt flag bit */ > + rc = regmap_write(data->regmap, VCNL_ISR, 0); > + if (rc) > + dev_err(data->dev, > + "Error (%d) writing ISR register\n", rc); > + > +err_unlock: > + mutex_unlock(&data->lock); > + > + return rc; > +} > + > +static int vcnl3020_config_threshold(struct iio_dev *indio_dev, bool state) > +{ > + struct vcnl3020_data *data = iio_priv(indio_dev); > + > + if (state) { > + return vcnl3020_enable_periodic(indio_dev, data); > + } else { > + if (!vcnl3020_is_thr_enabled(data)) > + return 0; > + return vcnl3020_disable_periodic(indio_dev, data); > + } > +} > + > +static int vcnl3020_write_event_config(struct iio_dev *indio_dev, > + const struct iio_chan_spec *chan, > + enum iio_event_type type, > + enum iio_event_direction dir, > + int state) > +{ > + switch (chan->type) { > + case IIO_PROXIMITY: > + return vcnl3020_config_threshold(indio_dev, state); > + default: > + return -EINVAL; > + } > +} > + > +static int vcnl3020_read_event_config(struct iio_dev *indio_dev, > + const struct iio_chan_spec *chan, > + enum iio_event_type type, > + enum iio_event_direction dir) > +{ > + struct vcnl3020_data *data = iio_priv(indio_dev); > + > + switch (chan->type) { > + case IIO_PROXIMITY: > + return vcnl3020_is_thr_enabled(data); > + default: > + return -EINVAL; > + } > +} > + > +static const struct iio_event_spec vcnl3020_event_spec[] = { > + { > + .type = IIO_EV_TYPE_THRESH, > + .dir = IIO_EV_DIR_RISING, > + .mask_separate = BIT(IIO_EV_INFO_VALUE), > + }, { > + .type = IIO_EV_TYPE_THRESH, > + .dir = IIO_EV_DIR_FALLING, > + .mask_separate = BIT(IIO_EV_INFO_VALUE), > + }, { > + .type = IIO_EV_TYPE_THRESH, > + .dir = IIO_EV_DIR_EITHER, > + .mask_separate = BIT(IIO_EV_INFO_ENABLE), > + }, > +}; > + > static const struct iio_chan_spec vcnl3020_channels[] = { > { > .type = IIO_PROXIMITY, > .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 = vcnl3020_event_spec, > + .num_event_specs = ARRAY_SIZE(vcnl3020_event_spec), > }, > }; > > @@ -288,6 +549,10 @@ static const struct iio_info vcnl3020_info = { > .read_raw = vcnl3020_read_raw, > .write_raw = vcnl3020_write_raw, > .read_avail = vcnl3020_read_avail, > + .read_event_value = vcnl3020_read_event, > + .write_event_value = vcnl3020_write_event, > + .read_event_config = vcnl3020_read_event_config, > + .write_event_config = vcnl3020_write_event_config, > }; > > static const struct regmap_config vcnl3020_regmap_config = { > @@ -296,6 +561,40 @@ static const struct regmap_config vcnl3020_regmap_config = { > .max_register = VCNL_PS_MOD_ADJ, > }; > > +static irqreturn_t vcnl3020_handle_irq_thread(int irq, void *p) > +{ > + struct iio_dev *indio_dev = p; > + struct vcnl3020_data *data = iio_priv(indio_dev); > + unsigned int isr; > + int rc; > + > + rc = regmap_read(data->regmap, VCNL_ISR, &isr); > + if (rc) { > + dev_err(data->dev, "Error (%d) reading reg (0x%x)\n", > + rc, VCNL_ISR); > + return IRQ_HANDLED; > + } > + > + if (isr & VCNL_ICR_THRES_EN) { > + iio_push_event(indio_dev, > + IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, > + 1, > + IIO_EV_TYPE_THRESH, > + IIO_EV_DIR_RISING), > + iio_get_time_ns(indio_dev)); > + > + rc = regmap_write(data->regmap, VCNL_ISR, > + isr & VCNL_ICR_THRES_EN); > + if (rc) > + dev_err(data->dev, "Error (%d) writing in reg (0x%x)\n", > + rc, VCNL_ISR); > + } else { > + return IRQ_NONE; > + } It doesn't matter a lot, but this would have been neater done as if (!(isr & VCNL_ICR_THRESH_EN)) return IRQ_NONE; iio_push_event(... if that's all that turns up I'll flip it around whilst applying. > + > + return IRQ_HANDLED; > +} > + > static int vcnl3020_probe(struct i2c_client *client) > { > struct vcnl3020_data *data; > @@ -328,6 +627,19 @@ static int vcnl3020_probe(struct i2c_client *client) > indio_dev->name = "vcnl3020"; > indio_dev->modes = INDIO_DIRECT_MODE; > > + if (client->irq) { > + rc = devm_request_threaded_irq(&client->dev, client->irq, > + NULL, vcnl3020_handle_irq_thread, > + IRQF_ONESHOT, indio_dev->name, > + indio_dev); > + if (rc) { > + dev_err(&client->dev, > + "Error (%d) irq request failed (%u)\n", rc, > + client->irq); > + return rc; > + } > + } > + > return devm_iio_device_register(&client->dev, indio_dev); > } >