From patchwork Wed Apr 22 14:11:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomasz Duszynski X-Patchwork-Id: 11503965 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D36CF15AB for ; Wed, 22 Apr 2020 14:20:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BCBD52084D for ; Wed, 22 Apr 2020 14:20:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727782AbgDVOUH (ORCPT ); Wed, 22 Apr 2020 10:20:07 -0400 Received: from smtpout1.mo528.mail-out.ovh.net ([46.105.34.251]:55401 "EHLO smtpout1.mo528.mail-out.ovh.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726414AbgDVOUF (ORCPT ); Wed, 22 Apr 2020 10:20:05 -0400 X-Greylist: delayed 416 seconds by postgrey-1.27 at vger.kernel.org; Wed, 22 Apr 2020 10:20:03 EDT Received: from pro2.mail.ovh.net (unknown [10.108.16.139]) by mo528.mail-out.ovh.net (Postfix) with ESMTPS id 30F8E5A6DE69; Wed, 22 Apr 2020 16:13:06 +0200 (CEST) Received: from arch.lan (89.70.31.203) by DAG2EX1.emp2.local (172.16.2.11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1847.3; Wed, 22 Apr 2020 16:13:05 +0200 From: Tomasz Duszynski To: CC: , , , , Tomasz Duszynski Subject: [PATCH 1/6] iio: chemical: scd30: add core driver Date: Wed, 22 Apr 2020 16:11:30 +0200 Message-ID: <20200422141135.86419-2-tomasz.duszynski@octakon.com> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200422141135.86419-1-tomasz.duszynski@octakon.com> References: <20200422141135.86419-1-tomasz.duszynski@octakon.com> MIME-Version: 1.0 X-Originating-IP: [89.70.31.203] X-ClientProxiedBy: DAG3EX2.emp2.local (172.16.2.22) To DAG2EX1.emp2.local (172.16.2.11) X-Ovh-Tracer-Id: 5832724470897662999 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: 0 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgeduhedrgeejgdeikecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfqggfjpdevjffgvefmvefgnecuuegrihhlohhuthemucehtddtnecunecujfgurhephffvufffkffojghfggfgtghisehtkeertdertddtnecuhfhrohhmpefvohhmrghsiicuffhushiihihnshhkihcuoehtohhmrghsiidrughushiihihnshhkihesohgtthgrkhhonhdrtghomheqnecukfhppedtrddtrddtrddtpdekledrjedtrdefuddrvddtfeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhhouggvpehsmhhtphdqohhuthdphhgvlhhopehprhhovddrmhgrihhlrdhovhhhrdhnvghtpdhinhgvtheptddrtddrtddrtddpmhgrihhlfhhrohhmpehtohhmrghsiidrughushiihihnshhkihesohgtthgrkhhonhdrtghomhdprhgtphhtthhopehjihgtvdefsehkvghrnhgvlhdrohhrgh Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Add Sensirion SCD30 carbon dioxide core driver. Signed-off-by: Tomasz Duszynski --- drivers/iio/chemical/Kconfig | 11 + drivers/iio/chemical/Makefile | 1 + drivers/iio/chemical/scd30.h | 72 +++ drivers/iio/chemical/scd30_core.c | 796 ++++++++++++++++++++++++++++++ 4 files changed, 880 insertions(+) create mode 100644 drivers/iio/chemical/scd30.h create mode 100644 drivers/iio/chemical/scd30_core.c diff --git a/drivers/iio/chemical/Kconfig b/drivers/iio/chemical/Kconfig index 0b91de4df8f4..55f249333fa2 100644 --- a/drivers/iio/chemical/Kconfig +++ b/drivers/iio/chemical/Kconfig @@ -74,6 +74,17 @@ config PMS7003 To compile this driver as a module, choose M here: the module will be called pms7003. +config SCD30_CORE + tristate "SCD30 carbon dioxide sensor driver" + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + help + Say Y here to build support for the Sensirion SCD30 sensor with carbon + dioxide, relative humidity and temperature sensing capabilities. + + To compile this driver as a module, choose M here: the module will + be called scd30_core. + config SENSIRION_SGP30 tristate "Sensirion SGPxx gas sensors" depends on I2C diff --git a/drivers/iio/chemical/Makefile b/drivers/iio/chemical/Makefile index 33d3a595dda9..54abcb641262 100644 --- a/drivers/iio/chemical/Makefile +++ b/drivers/iio/chemical/Makefile @@ -11,6 +11,7 @@ obj-$(CONFIG_BME680_SPI) += bme680_spi.o obj-$(CONFIG_CCS811) += ccs811.o obj-$(CONFIG_IAQCORE) += ams-iaq-core.o obj-$(CONFIG_PMS7003) += pms7003.o +obj-$(CONFIG_SCD30_CORE) += scd30_core.o obj-$(CONFIG_SENSIRION_SGP30) += sgp30.o obj-$(CONFIG_SPS30) += sps30.o obj-$(CONFIG_VZ89X) += vz89x.o diff --git a/drivers/iio/chemical/scd30.h b/drivers/iio/chemical/scd30.h new file mode 100644 index 000000000000..814782f5e71a --- /dev/null +++ b/drivers/iio/chemical/scd30.h @@ -0,0 +1,72 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _SCD30_H +#define _SCD30_H + +#include +#include +#include +#include +#include +#include +#include + +enum scd30_cmd { + /* start continuous measurement with pressure compensation */ + CMD_START_MEAS, + /* stop continuous measurement */ + CMD_STOP_MEAS, + /* set/get measurement interval */ + CMD_MEAS_INTERVAL, + /* check whether new measurement is ready */ + CMD_MEAS_READY, + /* get measurement */ + CMD_READ_MEAS, + /* turn on/off automatic self calibration */ + CMD_ASC, + /* set/get forced recalibration value */ + CMD_FRC, + /* set/get temperature offset */ + CMD_TEMP_OFFSET, + /* get firmware version */ + CMD_FW_VERSION, + /* reset sensor */ + CMD_RESET, + /* + * Command for altitude compensation was omitted intentionally because + * the same can be achieved by means of CMD_START_MEAS which takes + * pressure above the sea level as an argument. + */ +}; + +#define SCD30_MEAS_COUNT 3 + +struct scd30_state { + /* serialize access to the device */ + struct mutex lock; + struct device *dev; + struct regulator *vdd; + struct completion meas_ready; + void *priv; + int irq; + /* + * no way to retrieve current ambient pressure compensation value from + * the sensor so keep one around + */ + u16 pressure_comp; + u16 meas_interval; + int meas[SCD30_MEAS_COUNT]; + + int (*command)(struct scd30_state *state, enum scd30_cmd cmd, u16 arg, + char *rsp, int size); +}; + +int scd30_suspend(struct device *dev); +int scd30_resume(struct device *dev); + +static SIMPLE_DEV_PM_OPS(scd30_pm_ops, scd30_suspend, scd30_resume); + +int scd30_probe(struct device *dev, int irq, const char *name, void *priv, + int (*command)(struct scd30_state *state, enum scd30_cmd cmd, + u16 arg, char *rsp, int size)); + +#endif diff --git a/drivers/iio/chemical/scd30_core.c b/drivers/iio/chemical/scd30_core.c new file mode 100644 index 000000000000..4dc7e8f9a4f1 --- /dev/null +++ b/drivers/iio/chemical/scd30_core.c @@ -0,0 +1,796 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Sensirion SCD30 carbon dioxide sensor core driver + * + * Copyright (c) Tomasz Duszynski + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "scd30.h" + +/* pressure compensation in millibars */ +#define SCD30_PRESSURE_COMP_MIN 700 +#define SCD30_PRESSURE_COMP_MAX 1400 +#define SCD30_PRESSURE_COMP_DEFAULT 1013 +/* measurement interval in seconds */ +#define SCD30_MEAS_INTERVAL_MIN 2 +#define SCD30_MEAS_INTERVAL_MAX 1800 +#define SCD30_MEAS_INTERVAL_DEFAULT SCD30_MEAS_INTERVAL_MIN +/* reference CO2 concentration in ppm */ +#define SCD30_FRC_MIN 400 +#define SCD30_FRC_MAX 2000 + +enum { + CONC, + TEMP, + HR, +}; + +static int scd30_command(struct scd30_state *state, enum scd30_cmd cmd, u16 arg, + char *rsp, int size) +{ + int ret; + + ret = state->command(state, cmd, arg, rsp, size); + if (ret) + return ret; + + /* + * assumption holds that response buffer pointer has been already + * properly aligned so casts are safe + */ + while (size >= sizeof(u32)) { + *(u32 *)rsp = be32_to_cpup((__be32 *)rsp); + rsp += sizeof(u32); + size -= sizeof(u32); + } + + if (size) + *(u16 *)rsp = be16_to_cpup((__be16 *)rsp); + + return 0; +} + +static int scd30_reset(struct scd30_state *state) +{ + int ret; + u16 val; + + ret = scd30_command(state, CMD_RESET, 0, NULL, 0); + if (ret) + return ret; + + /* sensor boots up within 2 secs */ + msleep(2000); + /* + * Power-on-reset causes sensor to produce some glitch on i2c bus and + * some controllers end up in error state. Try to recover by placing + * any data on the bus. + */ + scd30_command(state, CMD_MEAS_READY, 0, (char *)&val, sizeof(val)); + + return 0; +} + +/* simplified float to fixed point conversion with a scaling factor of 0.01 */ +static int scd30_float_to_fp(int float32) +{ + int fraction, shift, + mantissa = float32 & GENMASK(22, 0), + sign = float32 & BIT(31) ? -1 : 1, + exp = (float32 & ~BIT(31)) >> 23; + + /* special case 0 */ + if (!exp && !mantissa) + return 0; + + exp -= 127; + if (exp < 0) { + exp = -exp; + /* return values ranging from 1 to 99 */ + return sign * ((((BIT(23) + mantissa) * 100) >> 23) >> exp); + } + + /* return values starting at 100 */ + shift = 23 - exp; + float32 = BIT(exp) + (mantissa >> shift); + fraction = mantissa & GENMASK(shift - 1, 0); + + return sign * (float32 * 100 + ((fraction * 100) >> shift)); +} + +static int scd30_read_meas(struct scd30_state *state) +{ + int i, ret; + + ret = scd30_command(state, CMD_READ_MEAS, 0, (char *)state->meas, + sizeof(state->meas)); + if (ret) + return ret; + + for (i = 0; i < ARRAY_SIZE(state->meas); i++) + state->meas[i] = scd30_float_to_fp(state->meas[i]); + + /* + * Accuracy within calibrated operating range is + * +-(30ppm + 3% measurement) so fractional part does + * not add real value. Moreover, ppm is an integer. + */ + state->meas[CONC] /= 100; + + return 0; +} + +static int scd30_wait_meas_irq(struct scd30_state *state) +{ + int ret, timeout = msecs_to_jiffies(state->meas_interval * 1250); + + reinit_completion(&state->meas_ready); + enable_irq(state->irq); + ret = wait_for_completion_interruptible_timeout(&state->meas_ready, + timeout); + if (ret > 0) + ret = 0; + else if (!ret) + ret = -ETIMEDOUT; + + disable_irq(state->irq); + + return ret; +} + +static int scd30_wait_meas_poll(struct scd30_state *state) +{ + int tries = 5; + + while (tries--) { + int ret; + u16 val; + + ret = scd30_command(state, CMD_MEAS_READY, 0, (char *)&val, + sizeof(val)); + if (ret) + return -EIO; + + /* new measurement available */ + if (val) + break; + + msleep_interruptible(state->meas_interval * 250); + } + + if (tries == -1) + return -ETIMEDOUT; + + return 0; +} + +static int scd30_read_poll(struct scd30_state *state) +{ + int ret; + + ret = scd30_wait_meas_poll(state); + if (ret) + return ret; + + return scd30_read_meas(state); +} + +static int scd30_read(struct scd30_state *state) +{ + if (state->irq > 0) + return scd30_wait_meas_irq(state); + + return scd30_read_poll(state); +} + +static int scd30_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct scd30_state *state = iio_priv(indio_dev); + int ret, meas[SCD30_MEAS_COUNT]; + + switch (mask) { + case IIO_CHAN_INFO_PROCESSED: + ret = iio_device_claim_direct_mode(indio_dev); + if (ret) + return ret; + + mutex_lock(&state->lock); + ret = scd30_read(state); + memcpy(meas, state->meas, sizeof(meas)); + mutex_unlock(&state->lock); + iio_device_release_direct_mode(indio_dev); + if (ret) + return ret; + + switch (chan->type) { + case IIO_CONCENTRATION: + *val = meas[chan->address] / 10000; + *val2 = (meas[chan->address] % 10000) * 100; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_TEMP: + case IIO_HUMIDITYRELATIVE: + *val = meas[chan->address] * 10; + return IIO_VAL_INT; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_CONCENTRATION: + *val = 0; + *val2 = 100; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_TEMP: + case IIO_HUMIDITYRELATIVE: + *val = 10; + return IIO_VAL_INT; + default: + return -EINVAL; + } + } + + return -EINVAL; +} + +static ssize_t pressure_comp_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct scd30_state *state = iio_priv(indio_dev); + int ret; + + mutex_lock(&state->lock); + ret = sprintf(buf, "%d\n", state->pressure_comp); + mutex_unlock(&state->lock); + + return ret; +} + +static ssize_t pressure_comp_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct scd30_state *state = iio_priv(indio_dev); + int ret; + u16 val; + + if (kstrtou16(buf, 0, &val)) + return -EINVAL; + + if ((val < SCD30_PRESSURE_COMP_MIN) || (val > SCD30_PRESSURE_COMP_MAX)) + return -EINVAL; + + mutex_lock(&state->lock); + ret = scd30_command(state, CMD_START_MEAS, val, NULL, 0); + if (ret) + goto out; + + state->pressure_comp = val; +out: + mutex_unlock(&state->lock); + + return ret ?: len; +} + +static ssize_t pressure_comp_available_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "[%d %d %d]\n", SCD30_PRESSURE_COMP_MIN, 1, + SCD30_PRESSURE_COMP_MAX); +} + +static ssize_t meas_interval_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct scd30_state *state = iio_priv(indio_dev); + int ret; + u16 val; + + mutex_lock(&state->lock); + ret = scd30_command(state, CMD_MEAS_INTERVAL, 0, (char *)&val, + sizeof(val)); + mutex_unlock(&state->lock); + + return ret ?: sprintf(buf, "%d\n", val); +} + +static ssize_t meas_interval_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct scd30_state *state = iio_priv(indio_dev); + int ret; + u16 val; + + if (kstrtou16(buf, 0, &val)) + return -EINVAL; + + if ((val < SCD30_MEAS_INTERVAL_MIN) || (val > SCD30_MEAS_INTERVAL_MAX)) + return -EINVAL; + + mutex_lock(&state->lock); + ret = scd30_command(state, CMD_MEAS_INTERVAL, val, NULL, 0); + if (ret) + goto out; + + state->meas_interval = val; +out: + mutex_unlock(&state->lock); + + return ret ?: len; +} + +static ssize_t meas_interval_available_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "[%d %d %d]\n", SCD30_MEAS_INTERVAL_MIN, 1, + SCD30_MEAS_INTERVAL_MAX); +} + +static ssize_t asc_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct scd30_state *state = iio_priv(indio_dev); + int ret; + u16 val; + + mutex_lock(&state->lock); + ret = scd30_command(state, CMD_ASC, 0, (char *)&val, sizeof(val)); + mutex_unlock(&state->lock); + + return ret ?: sprintf(buf, "%d\n", val); +} + +static ssize_t asc_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct scd30_state *state = iio_priv(indio_dev); + int ret; + u16 val; + + if (kstrtou16(buf, 0, &val)) + return -EINVAL; + + val = !!val; + mutex_lock(&state->lock); + ret = scd30_command(state, CMD_ASC, val, NULL, 0); + mutex_unlock(&state->lock); + + return ret ?: len; +} + +static ssize_t frc_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct scd30_state *state = iio_priv(indio_dev); + u16 val; + int ret; + + mutex_lock(&state->lock); + ret = scd30_command(state, CMD_FRC, 0, (char *)&val, sizeof(val)); + mutex_unlock(&state->lock); + + return ret ?: sprintf(buf, "%d\n", val); +} + +static ssize_t frc_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct scd30_state *state = iio_priv(indio_dev); + int ret; + u16 val; + + if (kstrtou16(buf, 0, &val)) + return -EINVAL; + + if ((val < SCD30_FRC_MIN) || (val > SCD30_FRC_MAX)) + return -EINVAL; + + mutex_lock(&state->lock); + ret = scd30_command(state, CMD_FRC, val, NULL, 0); + mutex_unlock(&state->lock); + + return ret ?: len; +} + +static ssize_t frc_available_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "[%d %d %d]\n", SCD30_FRC_MIN, 1, SCD30_FRC_MAX); +} + +static ssize_t temp_offset_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct scd30_state *state = iio_priv(indio_dev); + int ret; + u16 val; + + mutex_lock(&state->lock); + ret = scd30_command(state, CMD_TEMP_OFFSET, 0, (char *)&val, + sizeof(val)); + mutex_unlock(&state->lock); + + return ret ?: sprintf(buf, "%d\n", val); +} + +static ssize_t temp_offset_store(struct device *dev, + struct device_attribute *attr, const char *buf, + size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct scd30_state *state = iio_priv(indio_dev); + int ret; + u16 val; + + if (kstrtou16(buf, 0, &val)) + return -EINVAL; + + /* + * Manufacturer does not explicitly specify min/max sensible values + * hence check is omitted for simplicity. + */ + mutex_lock(&state->lock); + ret = scd30_command(state, CMD_TEMP_OFFSET, val, NULL, 0); + mutex_unlock(&state->lock); + + return ret ?: len; +} + +static ssize_t reset_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct scd30_state *state = iio_priv(indio_dev); + int ret; + + mutex_lock(&state->lock); + /* after reset previous sensor state will be restored automatically */ + ret = scd30_reset(state); + mutex_unlock(&state->lock); + + return ret ?: len; +} + +static IIO_DEVICE_ATTR_RW(pressure_comp, 0); +static IIO_DEVICE_ATTR_RO(pressure_comp_available, 0); +static IIO_DEVICE_ATTR_RW(meas_interval, 0); +static IIO_DEVICE_ATTR_RO(meas_interval_available, 0); +static IIO_DEVICE_ATTR_RW(asc, 0); +static IIO_DEVICE_ATTR_RW(frc, 0); +static IIO_DEVICE_ATTR_RO(frc_available, 0); +static IIO_DEVICE_ATTR_RW(temp_offset, 0); +static IIO_CONST_ATTR(temp_offset_available, "[0 1 65535]"); +static IIO_DEVICE_ATTR_WO(reset, 0); + +static struct attribute *scd30_attrs[] = { + &iio_dev_attr_pressure_comp.dev_attr.attr, + &iio_dev_attr_pressure_comp_available.dev_attr.attr, + &iio_dev_attr_meas_interval.dev_attr.attr, + &iio_dev_attr_meas_interval_available.dev_attr.attr, + &iio_dev_attr_asc.dev_attr.attr, + &iio_dev_attr_frc.dev_attr.attr, + &iio_dev_attr_frc_available.dev_attr.attr, + &iio_dev_attr_temp_offset.dev_attr.attr, + &iio_const_attr_temp_offset_available.dev_attr.attr, + &iio_dev_attr_reset.dev_attr.attr, + NULL +}; + +static const struct attribute_group scd30_attr_group = { + .attrs = scd30_attrs, +}; + +static const struct iio_info scd30_info = { + .attrs = &scd30_attr_group, + .read_raw = scd30_read_raw, +}; + +#define SCD30_CHAN(_type, _index) \ + .type = _type, \ + .address = _index, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ + .scan_index = _index + +#define SCD30_CHAN_SCAN_TYPE(_sign, _realbits) .scan_type = { \ + .sign = _sign, \ + .realbits = _realbits, \ + .storagebits = 32, \ + .endianness = IIO_CPU, \ +} + +static const struct iio_chan_spec scd30_channels[] = { + { + SCD30_CHAN(IIO_CONCENTRATION, CONC), + SCD30_CHAN_SCAN_TYPE('u', 16), + }, + { + SCD30_CHAN(IIO_TEMP, TEMP), + SCD30_CHAN_SCAN_TYPE('s', 14), + }, + { + SCD30_CHAN(IIO_HUMIDITYRELATIVE, HR), + SCD30_CHAN_SCAN_TYPE('u', 14), + }, + IIO_CHAN_SOFT_TIMESTAMP(3), +}; + +int __maybe_unused scd30_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct scd30_state *state = iio_priv(indio_dev); + int ret; + + ret = scd30_command(state, CMD_STOP_MEAS, 0, NULL, 0); + if (ret) + return ret; + + return regulator_disable(state->vdd); +} +EXPORT_SYMBOL(scd30_suspend); + +int __maybe_unused scd30_resume(struct device *dev) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct scd30_state *state = iio_priv(indio_dev); + int ret; + + ret = regulator_enable(state->vdd); + if (ret) + return ret; + + return scd30_command(state, CMD_START_MEAS, state->pressure_comp, + NULL, 0); +} +EXPORT_SYMBOL(scd30_resume); + +static void scd30_exit(void *data) +{ + struct scd30_state *state = data; + + scd30_command(state, CMD_STOP_MEAS, 0, NULL, 0); + regulator_disable(state->vdd); +} + +static irqreturn_t scd30_irq_handler(int irq, void *priv) +{ + struct iio_dev *indio_dev = priv; + + if (iio_buffer_enabled(indio_dev)) { + iio_trigger_poll(indio_dev->trig); + + return IRQ_HANDLED; + } + + return IRQ_WAKE_THREAD; +} + +static irqreturn_t scd30_irq_thread_handler(int irq, void *priv) +{ + struct iio_dev *indio_dev = priv; + struct scd30_state *state = iio_priv(indio_dev); + int ret; + + ret = scd30_read_meas(state); + if (ret) + goto out; + + complete_all(&state->meas_ready); +out: + return IRQ_HANDLED; +} + +static irqreturn_t scd30_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct scd30_state *state = iio_priv(indio_dev); + /* co2 concentration, temperature, rh, padding, timestamp */ + int data[SCD30_MEAS_COUNT + 1 + 2], ret = 0; + + mutex_lock(&state->lock); + if (!iio_trigger_using_own(indio_dev)) + ret = scd30_read_poll(state); + else + ret = scd30_read_meas(state); + memcpy(data, state->meas, sizeof(state->meas)); + mutex_unlock(&state->lock); + if (ret) + goto out; + + iio_push_to_buffers_with_timestamp(indio_dev, data, + iio_get_time_ns(indio_dev)); +out: + iio_trigger_notify_done(indio_dev->trig); + return IRQ_HANDLED; +} + +static int scd30_set_trigger_state(struct iio_trigger *trig, bool state) +{ + struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); + struct scd30_state *st = iio_priv(indio_dev); + + if (state) + enable_irq(st->irq); + else + disable_irq(st->irq); + + return 0; +} + +static const struct iio_trigger_ops scd30_trigger_ops = { + .set_trigger_state = scd30_set_trigger_state, +}; + +static int scd30_setup_trigger(struct iio_dev *indio_dev) +{ + struct scd30_state *state = iio_priv(indio_dev); + struct device *dev = indio_dev->dev.parent; + struct iio_trigger *trig; + int ret; + + trig = devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name, + indio_dev->id); + if (!trig) { + dev_err(dev, "failed to allocate trigger\n"); + return -ENOMEM; + } + + trig->dev.parent = dev; + trig->ops = &scd30_trigger_ops; + iio_trigger_set_drvdata(trig, indio_dev); + + ret = devm_iio_trigger_register(dev, trig); + if (ret) + return ret; + + indio_dev->trig = iio_trigger_get(trig); + + ret = devm_request_threaded_irq(dev, state->irq, scd30_irq_handler, + scd30_irq_thread_handler, + IRQF_TRIGGER_HIGH | IRQF_ONESHOT, + indio_dev->name, indio_dev); + if (ret) + dev_err(dev, "failed to request irq\n"); + + disable_irq(state->irq); + + return ret; +} + +int scd30_probe(struct device *dev, int irq, const char *name, void *priv, + int (*command)(struct scd30_state *state, enum scd30_cmd cmd, + u16 arg, char *rsp, int size)) +{ + static const unsigned long scd30_scan_masks[] = { 0x07, 0x00 }; + struct scd30_state *state; + struct iio_dev *indio_dev; + int ret; + u16 val; + + indio_dev = devm_iio_device_alloc(dev, sizeof(*state)); + if (!indio_dev) + return -ENOMEM; + + dev_set_drvdata(dev, indio_dev); + + state = iio_priv(indio_dev); + state->dev = dev; + state->priv = priv; + state->irq = irq; + state->pressure_comp = SCD30_PRESSURE_COMP_DEFAULT; + state->meas_interval = SCD30_MEAS_INTERVAL_DEFAULT; + state->command = command; + mutex_init(&state->lock); + init_completion(&state->meas_ready); + + indio_dev->dev.parent = dev; + indio_dev->info = &scd30_info; + indio_dev->name = name; + indio_dev->channels = scd30_channels; + indio_dev->num_channels = ARRAY_SIZE(scd30_channels); + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->available_scan_masks = scd30_scan_masks; + + state->vdd = devm_regulator_get(dev, "vdd"); + if (IS_ERR(state->vdd)) { + dev_err(dev, "failed to get vdd regulator\n"); + return PTR_ERR(state->vdd); + } + + ret = regulator_enable(state->vdd); + if (ret) { + dev_err(dev, "failed to enable vdd regulator\n"); + return ret; + } + + ret = devm_add_action_or_reset(dev, scd30_exit, state); + if (ret) + return ret; + + ret = scd30_reset(state); + if (ret) { + dev_err(dev, "failed to reset device: %d\n", ret); + return ret; + } + + if (state->irq > 0) { + ret = scd30_setup_trigger(indio_dev); + if (ret) { + dev_err(dev, "failed to setup trigger: %d\n", ret); + return ret; + } + } + + ret = devm_iio_triggered_buffer_setup(dev, indio_dev, NULL, + scd30_trigger_handler, NULL); + if (ret) + return ret; + + ret = scd30_command(state, CMD_FW_VERSION, 0, (char *)&val, + sizeof(val)); + if (ret) { + dev_err(dev, "failed to read firmware version: %d\n", ret); + return ret; + } + dev_info(dev, "firmware version: %d.%d\n", val >> 8, (char)val); + + ret = scd30_command(state, CMD_MEAS_INTERVAL, state->meas_interval, + NULL, 0); + if (ret) { + dev_err(dev, "failed to set measurement interval: %d\n", ret); + return ret; + } + + ret = scd30_command(state, CMD_START_MEAS, state->pressure_comp, + NULL, 0); + if (ret) { + dev_err(dev, "failed to start measurement: %d\n", ret); + return ret; + } + + return devm_iio_device_register(dev, indio_dev); +} +EXPORT_SYMBOL(scd30_probe); + +MODULE_AUTHOR("Tomasz Duszynski "); +MODULE_DESCRIPTION("Sensirion SCD30 carbon dioxide sensor core driver"); +MODULE_LICENSE("GPL v2"); From patchwork Wed Apr 22 14:11:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomasz Duszynski X-Patchwork-Id: 11503963 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 06ABF14DD for ; Wed, 22 Apr 2020 14:20:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E8AAC2084D for ; Wed, 22 Apr 2020 14:20:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727789AbgDVOUH (ORCPT ); Wed, 22 Apr 2020 10:20:07 -0400 Received: from smtpout1.mo528.mail-out.ovh.net ([46.105.34.251]:33717 "EHLO smtpout1.mo528.mail-out.ovh.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726720AbgDVOUF (ORCPT ); Wed, 22 Apr 2020 10:20:05 -0400 Received: from pro2.mail.ovh.net (unknown [10.108.20.220]) by mo528.mail-out.ovh.net (Postfix) with ESMTPS id AA0075A6DE6C; Wed, 22 Apr 2020 16:13:06 +0200 (CEST) Received: from arch.lan (89.70.31.203) by DAG2EX1.emp2.local (172.16.2.11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1847.3; Wed, 22 Apr 2020 16:13:06 +0200 From: Tomasz Duszynski To: CC: , , , , Tomasz Duszynski Subject: [PATCH 2/6] iio: chemical: scd30: add I2C interface driver Date: Wed, 22 Apr 2020 16:11:31 +0200 Message-ID: <20200422141135.86419-3-tomasz.duszynski@octakon.com> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200422141135.86419-1-tomasz.duszynski@octakon.com> References: <20200422141135.86419-1-tomasz.duszynski@octakon.com> MIME-Version: 1.0 X-Originating-IP: [89.70.31.203] X-ClientProxiedBy: DAG3EX2.emp2.local (172.16.2.22) To DAG2EX1.emp2.local (172.16.2.11) X-Ovh-Tracer-Id: 5832724470988758039 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: 0 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgeduhedrgeejgdeikecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfqggfjpdevjffgvefmvefgnecuuegrihhlohhuthemucehtddtnecunecujfgurhephffvufffkffojghfggfgtghisehtkeertdertddtnecuhfhrohhmpefvohhmrghsiicuffhushiihihnshhkihcuoehtohhmrghsiidrughushiihihnshhkihesohgtthgrkhhonhdrtghomheqnecukfhppedtrddtrddtrddtpdekledrjedtrdefuddrvddtfeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhhouggvpehsmhhtphdqohhuthdphhgvlhhopehprhhovddrmhgrihhlrdhovhhhrdhnvghtpdhinhgvtheptddrtddrtddrtddpmhgrihhlfhhrohhmpehtohhmrghsiidrughushiihihnshhkihesohgtthgrkhhonhdrtghomhdprhgtphhtthhopehjihgtvdefsehkvghrnhgvlhdrohhrgh Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Add I2C interface driver for the SCD30 sensor. Signed-off-by: Tomasz Duszynski --- drivers/iio/chemical/Kconfig | 11 +++ drivers/iio/chemical/Makefile | 1 + drivers/iio/chemical/scd30_i2c.c | 141 +++++++++++++++++++++++++++++++ 3 files changed, 153 insertions(+) create mode 100644 drivers/iio/chemical/scd30_i2c.c diff --git a/drivers/iio/chemical/Kconfig b/drivers/iio/chemical/Kconfig index 55f249333fa2..0c99f37b6bb0 100644 --- a/drivers/iio/chemical/Kconfig +++ b/drivers/iio/chemical/Kconfig @@ -85,6 +85,17 @@ config SCD30_CORE To compile this driver as a module, choose M here: the module will be called scd30_core. +config SCD30_I2C + tristate "SCD30 carbon dioxide sensor I2C driver" + depends on SCD30_CORE && I2C + select CRC8 + help + Say Y here to build support for the Sensirion SCD30 I2C interface + driver. + + To compile this driver as a module, choose M here: the module will + be called scd30_i2c. + config SENSIRION_SGP30 tristate "Sensirion SGPxx gas sensors" depends on I2C diff --git a/drivers/iio/chemical/Makefile b/drivers/iio/chemical/Makefile index 54abcb641262..f60c8ef358c3 100644 --- a/drivers/iio/chemical/Makefile +++ b/drivers/iio/chemical/Makefile @@ -12,6 +12,7 @@ obj-$(CONFIG_CCS811) += ccs811.o obj-$(CONFIG_IAQCORE) += ams-iaq-core.o obj-$(CONFIG_PMS7003) += pms7003.o obj-$(CONFIG_SCD30_CORE) += scd30_core.o +obj-$(CONFIG_SCD30_I2C) += scd30_i2c.o obj-$(CONFIG_SENSIRION_SGP30) += sgp30.o obj-$(CONFIG_SPS30) += sps30.o obj-$(CONFIG_VZ89X) += vz89x.o diff --git a/drivers/iio/chemical/scd30_i2c.c b/drivers/iio/chemical/scd30_i2c.c new file mode 100644 index 000000000000..c9cf30b05b1a --- /dev/null +++ b/drivers/iio/chemical/scd30_i2c.c @@ -0,0 +1,141 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Sensirion SCD30 carbon dioxide sensor i2c driver + * + * Copyright (c) Tomasz Duszynski + * + * I2C slave address: 0x61 + */ +#include +#include +#include +#include +#include +#include +#include +#include + +#include "scd30.h" + +#define SCD30_I2C_MAX_BUF_SIZE 18 +#define SCD30_I2C_CRC8_POLYNOMIAL 0x31 + +static u16 scd30_i2c_cmd_lookup_tbl[] = { + [CMD_START_MEAS] = 0x0010, + [CMD_STOP_MEAS] = 0x0104, + [CMD_MEAS_INTERVAL] = 0x4600, + [CMD_MEAS_READY] = 0x0202, + [CMD_READ_MEAS] = 0x0300, + [CMD_ASC] = 0x5306, + [CMD_FRC] = 0x5204, + [CMD_TEMP_OFFSET] = 0x5403, + [CMD_FW_VERSION] = 0xd100, + [CMD_RESET] = 0xd304, +}; + +DECLARE_CRC8_TABLE(scd30_i2c_crc8_tbl); + +static int scd30_i2c_xfer(struct scd30_state *state, char *txbuf, int txsize, + char *rxbuf, int rxsize) +{ + struct i2c_client *client = to_i2c_client(state->dev); + int ret; + + /* + * repeated start is not supported hence instead of sending two i2c + * messages in a row we send one by one + */ + ret = i2c_master_send(client, txbuf, txsize); + if (ret != txsize) + return ret < 0 ? ret : -EIO; + + if (!rxbuf) + return 0; + + ret = i2c_master_recv(client, rxbuf, rxsize); + if (ret != rxsize) + return ret < 0 ? ret : -EIO; + + return 0; +} + +static int scd30_i2c_command(struct scd30_state *state, enum scd30_cmd cmd, + u16 arg, char *rsp, int size) +{ + char crc, buf[SCD30_I2C_MAX_BUF_SIZE]; + int i, ret; + + put_unaligned_be16(scd30_i2c_cmd_lookup_tbl[cmd], buf); + i = 2; + + if (rsp) { + /* each two bytes are followed by a crc8 */ + size += size / 2; + } else { + put_unaligned_be16(arg, buf + i); + crc = crc8(scd30_i2c_crc8_tbl, buf + i, 2, CRC8_INIT_VALUE); + i += 2; + buf[i] = crc; + i += 1; + + /* commands below don't take an argument */ + if ((cmd == CMD_STOP_MEAS) || (cmd == CMD_RESET)) + i -= 3; + } + + ret = scd30_i2c_xfer(state, buf, i, buf, size); + if (ret) + return ret; + + /* validate received data and strip off crc bytes */ + for (i = 0; i < size; i += 3) { + crc = crc8(scd30_i2c_crc8_tbl, buf + i, 2, CRC8_INIT_VALUE); + if (crc != buf[i + 2]) { + dev_err(state->dev, "data integrity check failed\n"); + return -EIO; + } + + *rsp++ = buf[i]; + *rsp++ = buf[i + 1]; + } + + return 0; +} + +static int scd30_i2c_probe(struct i2c_client *client) +{ + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) + return -EOPNOTSUPP; + + crc8_populate_msb(scd30_i2c_crc8_tbl, SCD30_I2C_CRC8_POLYNOMIAL); + + return scd30_probe(&client->dev, client->irq, client->name, NULL, + scd30_i2c_command); +} + +static const struct i2c_device_id scd30_i2c_id[] = { + { "scd30" }, + { } +}; +MODULE_DEVICE_TABLE(i2c, scd30_i2c_id); + +static const struct of_device_id scd30_i2c_of_match[] = { + { .compatible = "sensirion,scd30" }, + { } +}; +MODULE_DEVICE_TABLE(of, scd30_i2c_of_match); + +static struct i2c_driver scd30_i2c_driver = { + .driver = { + .name = KBUILD_MODNAME, + .of_match_table = scd30_i2c_of_match, + .pm = &scd30_pm_ops, + }, + .id_table = scd30_i2c_id, + .probe_new = scd30_i2c_probe, +}; +module_i2c_driver(scd30_i2c_driver); + +MODULE_AUTHOR("Tomasz Duszynski "); +MODULE_DESCRIPTION("Sensirion SCD30 carbon dioxide sensor i2c driver"); +MODULE_LICENSE("GPL v2"); From patchwork Wed Apr 22 14:11:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomasz Duszynski X-Patchwork-Id: 11503967 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5EFA815AB for ; Wed, 22 Apr 2020 14:20:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4B86C2082E for ; Wed, 22 Apr 2020 14:20:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727774AbgDVOUG (ORCPT ); Wed, 22 Apr 2020 10:20:06 -0400 Received: from smtpout1.mo528.mail-out.ovh.net ([46.105.34.251]:57629 "EHLO smtpout1.mo528.mail-out.ovh.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726643AbgDVOUF (ORCPT ); Wed, 22 Apr 2020 10:20:05 -0400 Received: from pro2.mail.ovh.net (unknown [10.109.156.173]) by mo528.mail-out.ovh.net (Postfix) with ESMTPS id 4A8E05A6DE6D; Wed, 22 Apr 2020 16:13:07 +0200 (CEST) Received: from arch.lan (89.70.31.203) by DAG2EX1.emp2.local (172.16.2.11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1847.3; Wed, 22 Apr 2020 16:13:06 +0200 From: Tomasz Duszynski To: CC: , , , , Tomasz Duszynski Subject: [PATCH 3/6] iio: chemical: scd30: add serial interface driver Date: Wed, 22 Apr 2020 16:11:32 +0200 Message-ID: <20200422141135.86419-4-tomasz.duszynski@octakon.com> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200422141135.86419-1-tomasz.duszynski@octakon.com> References: <20200422141135.86419-1-tomasz.duszynski@octakon.com> MIME-Version: 1.0 X-Originating-IP: [89.70.31.203] X-ClientProxiedBy: DAG3EX2.emp2.local (172.16.2.22) To DAG2EX1.emp2.local (172.16.2.11) X-Ovh-Tracer-Id: 5833005946154015767 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: 0 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgeduhedrgeejgdeikecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfqggfjpdevjffgvefmvefgnecuuegrihhlohhuthemucehtddtnecunecujfgurhephffvufffkffojghfggfgtghisehtkeertdertddtnecuhfhrohhmpefvohhmrghsiicuffhushiihihnshhkihcuoehtohhmrghsiidrughushiihihnshhkihesohgtthgrkhhonhdrtghomheqnecukfhppedtrddtrddtrddtpdekledrjedtrdefuddrvddtfeenucevlhhushhtvghrufhiiigvpedvnecurfgrrhgrmhepmhhouggvpehsmhhtphdqohhuthdphhgvlhhopehprhhovddrmhgrihhlrdhovhhhrdhnvghtpdhinhgvtheptddrtddrtddrtddpmhgrihhlfhhrohhmpehtohhmrghsiidrughushiihihnshhkihesohgtthgrkhhonhdrtghomhdprhgtphhtthhopehjihgtvdefsehkvghrnhgvlhdrohhrgh Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Add serial interface driver for the SCD30 sensor. Signed-off-by: Tomasz Duszynski --- drivers/iio/chemical/Kconfig | 11 ++ drivers/iio/chemical/Makefile | 1 + drivers/iio/chemical/scd30_serial.c | 262 ++++++++++++++++++++++++++++ 3 files changed, 274 insertions(+) create mode 100644 drivers/iio/chemical/scd30_serial.c diff --git a/drivers/iio/chemical/Kconfig b/drivers/iio/chemical/Kconfig index 0c99f37b6bb0..1b7a58d320e7 100644 --- a/drivers/iio/chemical/Kconfig +++ b/drivers/iio/chemical/Kconfig @@ -96,6 +96,17 @@ config SCD30_I2C To compile this driver as a module, choose M here: the module will be called scd30_i2c. +config SCD30_SERIAL + tristate "SCD30 carbon dioxide sensor serial driver" + depends on SCD30_CORE && SERIAL_DEV_BUS + select CRC16 + help + Say Y here to build support for the Sensirion SCD30 serial interface + driver. + + To compile this driver as a module, choose M here: the module will + be called scd30_serial. + config SENSIRION_SGP30 tristate "Sensirion SGPxx gas sensors" depends on I2C diff --git a/drivers/iio/chemical/Makefile b/drivers/iio/chemical/Makefile index f60c8ef358c3..1fac1b14f825 100644 --- a/drivers/iio/chemical/Makefile +++ b/drivers/iio/chemical/Makefile @@ -13,6 +13,7 @@ obj-$(CONFIG_IAQCORE) += ams-iaq-core.o obj-$(CONFIG_PMS7003) += pms7003.o obj-$(CONFIG_SCD30_CORE) += scd30_core.o obj-$(CONFIG_SCD30_I2C) += scd30_i2c.o +obj-$(CONFIG_SCD30_SERIAL) += scd30_serial.o obj-$(CONFIG_SENSIRION_SGP30) += sgp30.o obj-$(CONFIG_SPS30) += sps30.o obj-$(CONFIG_VZ89X) += vz89x.o diff --git a/drivers/iio/chemical/scd30_serial.c b/drivers/iio/chemical/scd30_serial.c new file mode 100644 index 000000000000..93b98d5f2cc4 --- /dev/null +++ b/drivers/iio/chemical/scd30_serial.c @@ -0,0 +1,262 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Sensirion SCD30 carbon dioxide sensor serial driver + * + * Copyright (c) Tomasz Duszynski + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "scd30.h" + +#define SCD30_SERDEV_ADDR 0x61 +#define SCD30_SERDEV_WRITE 0x06 +#define SCD30_SERDEV_READ 0x03 +#define SCD30_SERDEV_MAX_BUF_SIZE 17 +#define SCD30_SERDEV_RX_HEADER_SIZE 3 +#define SCD30_SERDEV_CRC_SIZE 2 +#define SCD30_SERDEV_TIMEOUT msecs_to_jiffies(500) + +struct scd30_serdev_priv { + struct completion meas_ready; + char *buf; + int num_expected; + int num; +}; + +static u16 scd30_serdev_cmd_lookup_tbl[] = { + [CMD_START_MEAS] = 0x0036, + [CMD_STOP_MEAS] = 0x0037, + [CMD_MEAS_INTERVAL] = 0x0025, + [CMD_MEAS_READY] = 0x0027, + [CMD_READ_MEAS] = 0x0028, + [CMD_ASC] = 0x003a, + [CMD_FRC] = 0x0039, + [CMD_TEMP_OFFSET] = 0x003b, + [CMD_FW_VERSION] = 0x0020, + [CMD_RESET] = 0x0034, +}; + +static u16 scd30_serdev_calc_crc(const char *buf, int size) +{ + return crc16(0xffff, buf, size); +} + +static int scd30_serdev_xfer(struct scd30_state *state, char *txbuf, int txsize, + char *rxbuf, int rxsize) +{ + struct serdev_device *serdev = to_serdev_device(state->dev); + struct scd30_serdev_priv *priv = state->priv; + int ret; + + priv->buf = rxbuf; + priv->num_expected = rxsize; + priv->num = 0; + + ret = serdev_device_write(serdev, txbuf, txsize, SCD30_SERDEV_TIMEOUT); + if (ret < txsize) + return ret < 0 ? ret : -EIO; + + ret = wait_for_completion_interruptible_timeout(&priv->meas_ready, + SCD30_SERDEV_TIMEOUT); + if (ret > 0) + ret = 0; + else if (!ret) + ret = -ETIMEDOUT; + + return ret; +} + +static int scd30_serdev_command(struct scd30_state *state, enum scd30_cmd cmd, + u16 arg, char *rsp, int size) +{ + /* + * Communication over serial line is based on modbus protocol (or rather + * its variation called modbus over serial to be precise). Upon + * receiving a request device should reply with response. + * + * Frame below represents a request message. Each field takes + * exactly one byte. + * + * +------+------+-----+-----+-------+-------+-----+-----+ + * | dev | op | reg | reg | byte1 | byte0 | crc | crc | + * | addr | code | msb | lsb | | | lsb | msb | + * +------+------+-----+-----+-------+-------+-----+-----+ + * + * The message device replies with depends on the 'op code' field from + * the request. In case it was set to SCD30_SERDEV_WRITE sensor should + * reply with unchanged request. Otherwise 'op code' was set to + * SCD30_SERDEV_READ and response looks like the one below. As with + * request, each field takes one byte. + * + * +------+------+--------+-------+-----+-------+-----+-----+ + * | dev | op | num of | byte0 | ... | byteN | crc | crc | + * | addr | code | bytes | | | | lsb | msb | + * +------+------+--------+-------+-----+-------+-----+-----+ + */ + char rxbuf[SCD30_SERDEV_MAX_BUF_SIZE]; + char txbuf[SCD30_SERDEV_MAX_BUF_SIZE] = { SCD30_SERDEV_ADDR }; + int ret, rxsize, txsize = 2; + u16 crc; + + put_unaligned_be16(scd30_serdev_cmd_lookup_tbl[cmd], txbuf + txsize); + txsize += 2; + + if (rsp) { + txbuf[1] = SCD30_SERDEV_READ; + if (cmd == CMD_READ_MEAS) + /* number of u16 words to read */ + put_unaligned_be16(size / 2, txbuf + txsize); + else + put_unaligned_be16(0x0001, txbuf + txsize); + txsize += 2; + crc = scd30_serdev_calc_crc(txbuf, txsize); + put_unaligned_le16(crc, txbuf + txsize); + txsize += 2; + rxsize = SCD30_SERDEV_RX_HEADER_SIZE + size + + SCD30_SERDEV_CRC_SIZE; + } else { + if ((cmd == CMD_STOP_MEAS) || (cmd == CMD_RESET)) + arg = 0x0001; + + txbuf[1] = SCD30_SERDEV_WRITE; + put_unaligned_be16(arg, txbuf + txsize); + txsize += 2; + crc = scd30_serdev_calc_crc(txbuf, txsize); + put_unaligned_le16(crc, txbuf + txsize); + txsize += 2; + rxsize = txsize; + } + + ret = scd30_serdev_xfer(state, txbuf, txsize, rxbuf, rxsize); + if (ret) + return ret; + + switch (txbuf[1]) { + case SCD30_SERDEV_WRITE: + if (memcmp(txbuf, txbuf, txsize)) { + dev_err(state->dev, "wrong message received\n"); + return -EIO; + } + break; + case SCD30_SERDEV_READ: + if (rxbuf[2] != (rxsize - + SCD30_SERDEV_RX_HEADER_SIZE - + SCD30_SERDEV_CRC_SIZE)) { + dev_err(state->dev, + "received data size does not match header\n"); + return -EIO; + } + + rxsize -= SCD30_SERDEV_CRC_SIZE; + crc = get_unaligned_le16(rxbuf + rxsize); + if (crc != scd30_serdev_calc_crc(rxbuf, rxsize)) { + dev_err(state->dev, "data integrity check failed\n"); + return -EIO; + } + + rxsize -= SCD30_SERDEV_RX_HEADER_SIZE; + memcpy(rsp, rxbuf + SCD30_SERDEV_RX_HEADER_SIZE, rxsize); + break; + default: + dev_err(state->dev, "received unknown op code\n"); + return -EIO; + } + + return 0; +} + +static int scd30_serdev_receive_buf(struct serdev_device *serdev, + const unsigned char *buf, size_t size) +{ + struct iio_dev *indio_dev = dev_get_drvdata(&serdev->dev); + struct scd30_state *state = iio_priv(indio_dev); + struct scd30_serdev_priv *priv = state->priv; + int num; + + /* just in case sensor puts some unexpected bytes on the bus */ + if (!priv->buf) + return 0; + + if (priv->num + size >= priv->num_expected) + num = priv->num_expected - priv->num; + else + num = size; + + memcpy(priv->buf + priv->num, buf, num); + priv->num += num; + + if (priv->num == priv->num_expected) { + priv->buf = NULL; + complete(&priv->meas_ready); + } + + return num; +} + +static const struct serdev_device_ops scd30_serdev_ops = { + .receive_buf = scd30_serdev_receive_buf, + .write_wakeup = serdev_device_write_wakeup, +}; + +static int scd30_serdev_probe(struct serdev_device *serdev) +{ + struct device *dev = &serdev->dev; + struct scd30_serdev_priv *priv; + int irq, ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + init_completion(&priv->meas_ready); + serdev_device_set_client_ops(serdev, &scd30_serdev_ops); + + ret = devm_serdev_device_open(dev, serdev); + if (ret) + return ret; + + serdev_device_set_baudrate(serdev, 19200); + serdev_device_set_flow_control(serdev, false); + + ret = serdev_device_set_parity(serdev, SERDEV_PARITY_NONE); + if (ret) + return ret; + + irq = of_irq_get(dev->of_node, 0); + if (irq <= 0) + irq = 0; + + return scd30_probe(dev, irq, KBUILD_MODNAME, priv, + scd30_serdev_command); +} + +static const struct of_device_id scd30_serdev_of_match[] = { + { .compatible = "sensirion,scd30" }, + { } +}; +MODULE_DEVICE_TABLE(of, scd30_serdev_of_match); + +static struct serdev_device_driver scd30_serdev_driver = { + .driver = { + .name = KBUILD_MODNAME, + .of_match_table = scd30_serdev_of_match, + .pm = &scd30_pm_ops, + }, + .probe = scd30_serdev_probe, +}; +module_serdev_device_driver(scd30_serdev_driver); + +MODULE_AUTHOR("Tomasz Duszynski "); +MODULE_DESCRIPTION("Sensirion SCD30 carbon dioxide sensor serial driver"); +MODULE_LICENSE("GPL v2"); From patchwork Wed Apr 22 14:11:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomasz Duszynski X-Patchwork-Id: 11503971 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E484D15AB for ; Wed, 22 Apr 2020 14:22:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D64CC2098B for ; Wed, 22 Apr 2020 14:22:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727888AbgDVOWO (ORCPT ); Wed, 22 Apr 2020 10:22:14 -0400 Received: from smtpout1.mo803.mail-out.ovh.net ([79.137.123.219]:38519 "EHLO smtpout1.mo803.mail-out.ovh.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726419AbgDVOWN (ORCPT ); Wed, 22 Apr 2020 10:22:13 -0400 Received: from pro2.mail.ovh.net (unknown [10.109.146.85]) by mo803.mail-out.ovh.net (Postfix) with ESMTPS id D40504F477F1; Wed, 22 Apr 2020 16:13:07 +0200 (CEST) Received: from arch.lan (89.70.31.203) by DAG2EX1.emp2.local (172.16.2.11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1847.3; Wed, 22 Apr 2020 16:13:07 +0200 From: Tomasz Duszynski To: CC: , , , , Tomasz Duszynski Subject: [PATCH 4/6] Documentation: ABI: testing: scd30: document iio attributes Date: Wed, 22 Apr 2020 16:11:33 +0200 Message-ID: <20200422141135.86419-5-tomasz.duszynski@octakon.com> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200422141135.86419-1-tomasz.duszynski@octakon.com> References: <20200422141135.86419-1-tomasz.duszynski@octakon.com> MIME-Version: 1.0 X-Originating-IP: [89.70.31.203] X-ClientProxiedBy: DAG3EX2.emp2.local (172.16.2.22) To DAG2EX1.emp2.local (172.16.2.11) X-Ovh-Tracer-Id: 5833005944528591895 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: 0 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgeduhedrgeejgdeikecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfqggfjpdevjffgvefmvefgnecuuegrihhlohhuthemucehtddtnecunecujfgurhephffvufffkffojghfggfgtghisehtkeertdertddtnecuhfhrohhmpefvohhmrghsiicuffhushiihihnshhkihcuoehtohhmrghsiidrughushiihihnshhkihesohgtthgrkhhonhdrtghomheqnecukfhppedtrddtrddtrddtpdekledrjedtrdefuddrvddtfeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhhouggvpehsmhhtphdqohhuthdphhgvlhhopehprhhovddrmhgrihhlrdhovhhhrdhnvghtpdhinhgvtheptddrtddrtddrtddpmhgrihhlfhhrohhmpehtohhmrghsiidrughushiihihnshhkihesohgtthgrkhhonhdrtghomhdprhgtphhtthhopehjihgtvdefsehkvghrnhgvlhdrohhrgh Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Add documentation for sensor specific iio attributes. Signed-off-by: Tomasz Duszynski --- Documentation/ABI/testing/sysfs-bus-iio-scd30 | 97 +++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-scd30 diff --git a/Documentation/ABI/testing/sysfs-bus-iio-scd30 b/Documentation/ABI/testing/sysfs-bus-iio-scd30 new file mode 100644 index 000000000000..0431a718447d --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-iio-scd30 @@ -0,0 +1,97 @@ +What: /sys/bus/iio/devices/iio:deviceX/pressure_comp +Date: April 2020 +KernelVersion: 5.8 +Contact: linux-iio@vger.kernel.org +Description: + Given that sensor's CO2 measurement chamber has fixed volume + pressure changes will affect concentration readings. Writing + current ambient pressure here will allow senor to make necessary + adjustments. Upon reading previously set value is returned. + Units are millibars. + +What: /sys/bus/iio/devices/iio:deviceX/pressure_comp_available +Date: April 2020 +KernelVersion: 5.8 +Contact: linux-iio@vger.kernel.org +Description: + The range of available values in millibars represented as the + minimum value, the step and the maximum value, all enclosed in + square brackets. + +What: /sys/bus/iio/devices/iio:deviceX/meas_interval +Date: January 2020 +KernelVersion: 5.8 +Contact: linux-iio@vger.kernel.org +Description: + Amount of time between subsequent measurements. Writing this + attribute will change measurement interval. Upon reading + current measurement interval is returned. Units are seconds. + +What: /sys/bus/iio/devices/iio:deviceX/meas_interval_available +Date: April 2020 +KernelVersion: 5.8 +Contact: linux-iio@vger.kernel.org +Description: + The range of available values in seconds represented as the + minimum value, the step and the maximum value, all enclosed in + square brackets. + +What: /sys/bus/iio/devices/iio:deviceX/asc +Date: April 2020 +KernelVersion: 5.8 +Contact: linux-iio@vger.kernel.org +Description: + Writing 1 or 0 to this attribute will respectively activate or + deactivate automatic self calibration procedure. Upon reading 1 + is returned if asc is ongoing, 0 otherwise. + +What: /sys/bus/iio/devices/iio:deviceX/frc +Date: April 2020 +KernelVersion: 5.8 +Contact: linux-iio@vger.kernel.org +Description: + Forced recalibration is used to compensate for sensor drifts + when a reference value of CO2 concentration in close proximity + to the sensor is available. Writing attribute will set frc + value. Upon reading current frc is returned. Units are + millibars. + +What: /sys/bus/iio/devices/iio:deviceX/frc_available +Date: April 2020 +KernelVersion: 5.8 +Contact: linux-iio@vger.kernel.org +Description: + The range of available values in millibars represented as the + minimum value, the step and the maximum value, all enclosed in + square brackets. + +What: /sys/bus/iio/devices/iio:deviceX/temp_offset +Date: April 2020 +KernelVersion: 5.8 +Contact: linux-iio@vger.kernel.org +Description: + Sensor readings may be affected by ambient temperature. + Writing temperature offset will compensate for unwanted changes. + Note that written offset gets multiplied by a factor of 100 + by a sensor internally. + + For example, writing 10 here will correspond to 0.1 degree + Celsius. + +What: /sys/bus/iio/devices/iio:deviceX/temp_offset_available +Date: April 2020 +KernelVersion: 5.8 +Contact: linux-iio@vger.kernel.org +Description: + The range of available values in degrees Celsius represented as + the minimum value, the step and the maximum value, all enclosed + in square brackets. + +What: /sys/bus/iio/devices/iio:deviceX/reset +Date: April 2020 +KernelVersion: 5.8 +Contact: linux-iio@vger.kernel.org +Description: + Software reset mechanism forces sensor into the same state + as after powering up without the need for removing power supply. + Writing any value will reset sensor. From patchwork Wed Apr 22 14:11:34 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomasz Duszynski X-Patchwork-Id: 11503961 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 316D615AB for ; Wed, 22 Apr 2020 14:20:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 222B52082E for ; Wed, 22 Apr 2020 14:20:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727832AbgDVOUM (ORCPT ); Wed, 22 Apr 2020 10:20:12 -0400 Received: from smtpout1.mo528.mail-out.ovh.net ([46.105.34.251]:37741 "EHLO smtpout1.mo528.mail-out.ovh.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727819AbgDVOUK (ORCPT ); Wed, 22 Apr 2020 10:20:10 -0400 Received: from pro2.mail.ovh.net (unknown [10.108.1.71]) by mo528.mail-out.ovh.net (Postfix) with ESMTPS id 613665A6DE74; Wed, 22 Apr 2020 16:13:08 +0200 (CEST) Received: from arch.lan (89.70.31.203) by DAG2EX1.emp2.local (172.16.2.11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1847.3; Wed, 22 Apr 2020 16:13:07 +0200 From: Tomasz Duszynski To: CC: , , , , Tomasz Duszynski Subject: [PATCH 5/6] dt-bindings: iio: scd30: add device binding file Date: Wed, 22 Apr 2020 16:11:34 +0200 Message-ID: <20200422141135.86419-6-tomasz.duszynski@octakon.com> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200422141135.86419-1-tomasz.duszynski@octakon.com> References: <20200422141135.86419-1-tomasz.duszynski@octakon.com> MIME-Version: 1.0 X-Originating-IP: [89.70.31.203] X-ClientProxiedBy: DAG3EX2.emp2.local (172.16.2.22) To DAG2EX1.emp2.local (172.16.2.11) X-Ovh-Tracer-Id: 5833287420189891607 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: 0 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgeduhedrgeejgdeikecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfqggfjpdevjffgvefmvefgnecuuegrihhlohhuthemucehtddtnecunecujfgurhephffvufffkffojghfggfgtghisehtkeertdertddtnecuhfhrohhmpefvohhmrghsiicuffhushiihihnshhkihcuoehtohhmrghsiidrughushiihihnshhkihesohgtthgrkhhonhdrtghomheqnecuffhomhgrihhnpeguvghvihgtvghtrhgvvgdrohhrghenucfkpheptddrtddrtddrtddpkeelrdejtddrfedurddvtdefnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehmohguvgepshhmthhpqdhouhhtpdhhvghlohepphhrohdvrdhmrghilhdrohhvhhdrnhgvthdpihhnvghtpedtrddtrddtrddtpdhmrghilhhfrhhomhepthhomhgrshiirdguuhhsiiihnhhskhhisehotghtrghkohhnrdgtohhmpdhrtghpthhtohepjhhitgdvfeeskhgvrhhnvghlrdhorhhg Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Add SCD30 sensor binding file. Signed-off-by: Tomasz Duszynski --- .../iio/chemical/sensirion,scd30.yaml | 71 +++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/chemical/sensirion,scd30.yaml diff --git a/Documentation/devicetree/bindings/iio/chemical/sensirion,scd30.yaml b/Documentation/devicetree/bindings/iio/chemical/sensirion,scd30.yaml new file mode 100644 index 000000000000..b092b2530c76 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/chemical/sensirion,scd30.yaml @@ -0,0 +1,71 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/chemical/sensirion,scd30.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Sensirion SCD30 carbon dioxide sensor + +maintainers: + - Tomasz Duszynski + +description: | + Air quality sensor capable of measuring co2 concentration, temperature + and relative humidity. + +properties: + compatible: + enum: + - sensirion,scd30 + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + vdd-supply: true + + sensirion,sel-gpios: + description: GPIO connected to the SEL line + maxItems: 1 + + sensirion,pwm-gpios: + description: GPIO connected to the PWM line + maxItems: 1 + +required: + - compatible + - vdd-supply + +additionalProperties: false + +examples: + - | + # include + # include + i2c { + #address-cells = <1>; + #size-cells = <0>; + + scd30@61 { + compatible = "sensirion,scd30"; + reg = <0x61>; + vdd-supply = <&vdd>; + interrupt-parrent = <&gpio0>; + interrupts = <0 IRQ_TYPE_LEVEL_HIGH>; + }; + }; + - | + # include + # include + serial { + scd30 { + compatible = "sensirion,scd30"; + vdd-supply = <&vdd>; + interrupt-parrent = <&gpio0>; + interrupts = <0 IRQ_TYPE_LEVEL_HIGH>; + }; + }; + +... From patchwork Wed Apr 22 14:11:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomasz Duszynski X-Patchwork-Id: 11503973 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A9CF814DD for ; Wed, 22 Apr 2020 14:22:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 912912082E for ; Wed, 22 Apr 2020 14:22:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727018AbgDVOWL (ORCPT ); Wed, 22 Apr 2020 10:22:11 -0400 Received: from smtpout1.mo803.mail-out.ovh.net ([79.137.123.219]:54955 "EHLO smtpout1.mo803.mail-out.ovh.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725648AbgDVOWL (ORCPT ); Wed, 22 Apr 2020 10:22:11 -0400 X-Greylist: delayed 544 seconds by postgrey-1.27 at vger.kernel.org; Wed, 22 Apr 2020 10:22:10 EDT Received: from pro2.mail.ovh.net (unknown [10.108.16.54]) by mo803.mail-out.ovh.net (Postfix) with ESMTPS id 1039B4F477F5; Wed, 22 Apr 2020 16:13:09 +0200 (CEST) Received: from arch.lan (89.70.31.203) by DAG2EX1.emp2.local (172.16.2.11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1847.3; Wed, 22 Apr 2020 16:13:08 +0200 From: Tomasz Duszynski To: CC: , , , , Tomasz Duszynski Subject: [PATCH 6/6] MAINTAINERS: add myself as a SCD30 driver maintainer Date: Wed, 22 Apr 2020 16:11:35 +0200 Message-ID: <20200422141135.86419-7-tomasz.duszynski@octakon.com> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200422141135.86419-1-tomasz.duszynski@octakon.com> References: <20200422141135.86419-1-tomasz.duszynski@octakon.com> MIME-Version: 1.0 X-Originating-IP: [89.70.31.203] X-ClientProxiedBy: DAG3EX2.emp2.local (172.16.2.22) To DAG2EX1.emp2.local (172.16.2.11) X-Ovh-Tracer-Id: 5833568894880275479 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: 0 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgeduhedrgeejgdeikecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfqggfjpdevjffgvefmvefgnecuuegrihhlohhuthemucehtddtnecunecujfgurhephffvufffkffojghfggfgtghisehtkeertdertddtnecuhfhrohhmpefvohhmrghsiicuffhushiihihnshhkihcuoehtohhmrghsiidrughushiihihnshhkihesohgtthgrkhhonhdrtghomheqnecukfhppedtrddtrddtrddtpdekledrjedtrdefuddrvddtfeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhhouggvpehsmhhtphdqohhuthdphhgvlhhopehprhhovddrmhgrihhlrdhovhhhrdhnvghtpdhinhgvtheptddrtddrtddrtddpmhgrihhlfhhrohhmpehtohhmrghsiidrughushiihihnshhkihesohgtthgrkhhonhdrtghomhdprhgtphhtthhopehjihgtvdefsehkvghrnhgvlhdrohhrgh Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Add myself as a SCD30 driver maintainer. Signed-off-by: Tomasz Duszynski --- MAINTAINERS | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index c900a82f7434..e11c5594199d 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15001,6 +15001,15 @@ S: Maintained F: drivers/misc/phantom.c F: include/uapi/linux/phantom.h +SENSIRION SCD30 CARBON DIOXIDE SENSOR DRIVER +M: Tomasz Duszynski +S: Maintained +F: drivers/iio/chemical/scd30.h +F: drivers/iio/chemical/scd30_core.c +F: drivers/iio/chemical/scd30_i2c.c +F: drivers/iio/chemical/scd30_serial.c +F: Documentation/devicetree/bindings/iio/chemical/sensirion,scd30.yaml + SENSIRION SPS30 AIR POLLUTION SENSOR DRIVER M: Tomasz Duszynski S: Maintained