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([2a04:ee41:82:7577:b243:5cd3:bfdd:a16e]) by smtp.googlemail.com with ESMTPSA id ffacd0b85a97d-381c113e5cbsm8081570f8f.80.2024.11.02.06.13.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 02 Nov 2024 06:13:25 -0700 (PDT) From: Vasileios Amoiridis To: jic23@kernel.org, lars@metafoo.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andriy.shevchenko@linux.intel.com Cc: vassilisamir@gmail.com, anshulusr@gmail.com, gustavograzs@gmail.com, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 1/7] iio: chemical: bme680: refactorize set_mode() mode Date: Sat, 2 Nov 2024 14:13:05 +0100 Message-ID: <20241102131311.36210-2-vassilisamir@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241102131311.36210-1-vassilisamir@gmail.com> References: <20241102131311.36210-1-vassilisamir@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Refactorize the set_mode() function to use an external enum that describes the possible modes of the BME680 device instead of using true/false variables for selecting SLEEPING/FORCED mode. Signed-off-by: Vasileios Amoiridis --- drivers/iio/chemical/bme680.h | 2 -- drivers/iio/chemical/bme680_core.c | 31 ++++++++++++++---------------- 2 files changed, 14 insertions(+), 19 deletions(-) diff --git a/drivers/iio/chemical/bme680.h b/drivers/iio/chemical/bme680.h index f5be4516dde7..77136b55e7f6 100644 --- a/drivers/iio/chemical/bme680.h +++ b/drivers/iio/chemical/bme680.h @@ -27,8 +27,6 @@ #define BME680_OSRS_TEMP_MASK GENMASK(7, 5) #define BME680_OSRS_PRESS_MASK GENMASK(4, 2) #define BME680_MODE_MASK GENMASK(1, 0) -#define BME680_MODE_FORCED 1 -#define BME680_MODE_SLEEP 0 =20 #define BME680_REG_CONFIG 0x75 #define BME680_FILTER_MASK GENMASK(4, 2) diff --git a/drivers/iio/chemical/bme680_core.c b/drivers/iio/chemical/bme6= 80_core.c index 6d11f9188367..5c2c327c4540 100644 --- a/drivers/iio/chemical/bme680_core.c +++ b/drivers/iio/chemical/bme680_core.c @@ -95,6 +95,12 @@ struct bme680_calib { s8 range_sw_err; }; =20 +/* values of CTRL_MEAS register */ +enum bme680_op_mode { + BME680_MODE_SLEEP =3D 0, + BME680_MODE_FORCED =3D 1, +}; + struct bme680_data { struct regmap *regmap; struct bme680_calib bme680; @@ -502,23 +508,16 @@ static u8 bme680_calc_heater_dur(u16 dur) return durval; } =20 -static int bme680_set_mode(struct bme680_data *data, bool mode) +static int bme680_set_mode(struct bme680_data *data, enum bme680_op_mode m= ode) { struct device *dev =3D regmap_get_device(data->regmap); int ret; =20 - if (mode) { - ret =3D regmap_write_bits(data->regmap, BME680_REG_CTRL_MEAS, - BME680_MODE_MASK, BME680_MODE_FORCED); - if (ret < 0) - dev_err(dev, "failed to set forced mode\n"); - - } else { - ret =3D regmap_write_bits(data->regmap, BME680_REG_CTRL_MEAS, - BME680_MODE_MASK, BME680_MODE_SLEEP); - if (ret < 0) - dev_err(dev, "failed to set sleep mode\n"); - + ret =3D regmap_write_bits(data->regmap, BME680_REG_CTRL_MEAS, + BME680_MODE_MASK, mode); + if (ret < 0) { + dev_err(dev, "failed to set ctrl_meas register\n"); + return ret; } =20 return ret; @@ -613,8 +612,7 @@ static int bme680_gas_config(struct bme680_data *data) int ret; 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([2a04:ee41:82:7577:b243:5cd3:bfdd:a16e]) by smtp.googlemail.com with ESMTPSA id ffacd0b85a97d-381c113e5cbsm8081570f8f.80.2024.11.02.06.13.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 02 Nov 2024 06:13:26 -0700 (PDT) From: Vasileios Amoiridis To: jic23@kernel.org, lars@metafoo.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andriy.shevchenko@linux.intel.com Cc: vassilisamir@gmail.com, anshulusr@gmail.com, gustavograzs@gmail.com, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 2/7] iio: chemical: bme680: Add SCALE and RAW channels Date: Sat, 2 Nov 2024 14:13:06 +0100 Message-ID: <20241102131311.36210-3-vassilisamir@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241102131311.36210-1-vassilisamir@gmail.com> References: <20241102131311.36210-1-vassilisamir@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add SCALE,RAW channels to the device. Even though PROCESSED should be kept for backwards compatibility add comment to avoid using it if the value is not actually reported in IIO values. Signed-off-by: Vasileios Amoiridis --- drivers/iio/chemical/bme680_core.c | 51 ++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) diff --git a/drivers/iio/chemical/bme680_core.c b/drivers/iio/chemical/bme6= 80_core.c index 5c2c327c4540..ea1ee9964870 100644 --- a/drivers/iio/chemical/bme680_core.c +++ b/drivers/iio/chemical/bme680_core.c @@ -144,17 +144,26 @@ EXPORT_SYMBOL_NS(bme680_regmap_config, IIO_BME680); static const struct iio_chan_spec bme680_channels[] =3D { { .type =3D IIO_TEMP, + /* PROCESSED maintained for ABI backwards compatibility */ .info_mask_separate =3D BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), }, { .type =3D IIO_PRESSURE, + /* PROCESSED maintained for ABI backwards compatibility */ .info_mask_separate =3D BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), }, { .type =3D IIO_HUMIDITYRELATIVE, + /* PROCESSED maintained for ABI backwards compatibility */ .info_mask_separate =3D BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), }, { @@ -787,6 +796,48 @@ static int bme680_read_raw(struct iio_dev *indio_dev, default: return -EINVAL; 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([2a04:ee41:82:7577:b243:5cd3:bfdd:a16e]) by smtp.googlemail.com with ESMTPSA id ffacd0b85a97d-381c113e5cbsm8081570f8f.80.2024.11.02.06.13.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 02 Nov 2024 06:13:27 -0700 (PDT) From: Vasileios Amoiridis To: jic23@kernel.org, lars@metafoo.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andriy.shevchenko@linux.intel.com Cc: vassilisamir@gmail.com, anshulusr@gmail.com, gustavograzs@gmail.com, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 3/7] iio: chemical: bme680: Add triggered buffer support Date: Sat, 2 Nov 2024 14:13:07 +0100 Message-ID: <20241102131311.36210-4-vassilisamir@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241102131311.36210-1-vassilisamir@gmail.com> References: <20241102131311.36210-1-vassilisamir@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add triggered buffer and soft timestamp support. The available scan mask enables all the channels of the sensor in order to follow the operation of the sensor. The sensor basically starts to capture from all channels as long as it enters into FORCED mode. The bulk read, reads a total of 15 registers from the sensor, 0x1D..0x2B. Even though some of those registers are not reported in the register map of the device, this is how the BME680 Sensor API [1] proposes to do it. This allows to have one bulk read instead of multiple ones. Link: https://github.com/boschsensortec/BME68x_SensorAPI/blob/v4.4.8/bme68x= .c#L1200 Signed-off-by: Vasileios Amoiridis --- drivers/iio/chemical/Kconfig | 2 + drivers/iio/chemical/bme680.h | 3 + drivers/iio/chemical/bme680_core.c | 137 ++++++++++++++++++++++++++++- 3 files changed, 141 insertions(+), 1 deletion(-) diff --git a/drivers/iio/chemical/Kconfig b/drivers/iio/chemical/Kconfig index 6c87223f58d9..330fe0af946f 100644 --- a/drivers/iio/chemical/Kconfig +++ b/drivers/iio/chemical/Kconfig @@ -50,6 +50,8 @@ config BME680 select REGMAP select BME680_I2C if I2C select BME680_SPI if SPI + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER help Say yes here to build support for Bosch Sensortec BME680 sensor with temperature, pressure, humidity and gas sensing capability. diff --git a/drivers/iio/chemical/bme680.h b/drivers/iio/chemical/bme680.h index 77136b55e7f6..a0a7794543c8 100644 --- a/drivers/iio/chemical/bme680.h +++ b/drivers/iio/chemical/bme680.h @@ -66,6 +66,9 @@ /* Datasheet Section 1.1, Table 1 */ #define BME680_STARTUP_TIME_US 2000 =20 +#define BME680_NUM_CHANNELS 4 +#define BME680_NUM_BULK_READ_REGS 15 + /* Calibration Parameters */ #define BME680_T2_LSB_REG 0x8A #define BME680_H2_MSB_REG 0xE1 diff --git a/drivers/iio/chemical/bme680_core.c b/drivers/iio/chemical/bme6= 80_core.c index ea1ee9964870..6df87383c243 100644 --- a/drivers/iio/chemical/bme680_core.c +++ b/drivers/iio/chemical/bme680_core.c @@ -16,8 +16,11 @@ #include #include =20 +#include #include #include +#include +#include =20 #include =20 @@ -101,6 +104,13 @@ enum bme680_op_mode { BME680_MODE_FORCED =3D 1, }; =20 +enum bme680_scan { + BME680_TEMP, + BME680_PRESS, + BME680_HUMID, + BME680_GAS, +}; + struct bme680_data { struct regmap *regmap; struct bme680_calib bme680; @@ -111,8 +121,13 @@ struct bme680_data { u16 heater_dur; u16 heater_temp; =20 + struct { + s32 chan[4]; + aligned_s64 ts; + } scan; + union { - u8 buf[3]; + u8 buf[BME680_NUM_BULK_READ_REGS]; unsigned int check; __be16 be16; u8 bme680_cal_buf_1[BME680_CALIB_RANGE_1_LEN]; @@ -149,6 +164,13 @@ static const struct iio_chan_spec bme680_channels[] = =3D { BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), + .scan_index =3D 0, + .scan_type =3D { + .sign =3D 's', + .realbits =3D 16, + .storagebits =3D 16, + .endianness =3D IIO_CPU, + }, }, { .type =3D IIO_PRESSURE, @@ -157,6 +179,13 @@ static const struct iio_chan_spec bme680_channels[] = =3D { BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), + .scan_index =3D 1, + .scan_type =3D { + .sign =3D 'u', + .realbits =3D 32, + .storagebits =3D 32, + .endianness =3D IIO_CPU, + }, }, { .type =3D IIO_HUMIDITYRELATIVE, @@ -165,11 +194,26 @@ static const struct iio_chan_spec bme680_channels[] = =3D { BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), + .scan_index =3D 2, + .scan_type =3D { + .sign =3D 'u', + .realbits =3D 32, + .storagebits =3D 32, + .endianness =3D IIO_CPU, + }, }, { .type =3D IIO_RESISTANCE, .info_mask_separate =3D BIT(IIO_CHAN_INFO_PROCESSED), + .scan_index =3D 3, + .scan_type =3D { + .sign =3D 'u', + .realbits =3D 32, + .storagebits =3D 32, + .endianness =3D IIO_CPU, + }, }, + IIO_CHAN_SOFT_TIMESTAMP(4), }; =20 static int bme680_read_calib(struct bme680_data *data, @@ -920,6 +964,88 @@ static const struct iio_info bme680_info =3D { .attrs =3D &bme680_attribute_group, }; =20 +static const unsigned long bme680_avail_scan_masks[] =3D { + BIT(BME680_GAS) | BIT(BME680_HUMID) | BIT(BME680_PRESS) | BIT(BME680_TEMP= ), + 0 +}; + +static irqreturn_t bme680_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf =3D p; + struct iio_dev *indio_dev =3D pf->indio_dev; + struct bme680_data *data =3D iio_priv(indio_dev); + struct device *dev =3D regmap_get_device(data->regmap); + u32 adc_temp, adc_press, adc_humid; + u16 adc_gas_res, gas_regs_val; + u8 gas_range; + s32 t_fine; + int ret; + + guard(mutex)(&data->lock); + + ret =3D bme680_set_mode(data, BME680_MODE_FORCED); + if (ret < 0) + goto out; + + ret =3D bme680_wait_for_eoc(data); + if (ret) + goto out; + + /* Burst read data regs */ + ret =3D regmap_bulk_read(data->regmap, BME680_REG_MEAS_STAT_0, + data->buf, sizeof(data->buf)); + if (ret) { + dev_err(dev, "failed to burst read sensor data\n"); + goto out; + } + if (data->buf[0] & BME680_GAS_MEAS_BIT) { + dev_err(dev, "gas measurement incomplete\n"); + goto out; + } + + /* Temperature calculations */ + adc_temp =3D FIELD_GET(BME680_MEAS_TRIM_MASK, get_unaligned_be24(&data->b= uf[5])); + if (adc_temp =3D=3D BME680_MEAS_SKIPPED) { + dev_err(dev, "reading temperature skipped\n"); + goto out; + } + data->scan.chan[0] =3D bme680_compensate_temp(data, adc_temp); + t_fine =3D bme680_calc_t_fine(data, adc_temp); + + /* Pressure calculations */ + adc_press =3D FIELD_GET(BME680_MEAS_TRIM_MASK, get_unaligned_be24(&data->= buf[2])); + if (adc_press =3D=3D BME680_MEAS_SKIPPED) { + dev_err(dev, "reading pressure skipped\n"); + goto out; + } + data->scan.chan[1] =3D bme680_compensate_press(data, adc_press, t_fine); + + /* Humidity calculations */ + adc_humid =3D get_unaligned_be16(&data->buf[8]); + if (adc_humid =3D=3D BME680_MEAS_SKIPPED) { + dev_err(dev, "reading humidity skipped\n"); + goto out; + } + data->scan.chan[2] =3D bme680_compensate_humid(data, adc_humid, t_fine); + + /* Gas calculations */ + gas_regs_val =3D get_unaligned_be16(&data->buf[13]); + adc_gas_res =3D FIELD_GET(BME680_ADC_GAS_RES, gas_regs_val); + if ((gas_regs_val & BME680_GAS_STAB_BIT) =3D=3D 0) { + dev_err(dev, "heater failed to reach the target temperature\n"); + goto out; + } + gas_range =3D FIELD_GET(BME680_GAS_RANGE_MASK, gas_regs_val); + data->scan.chan[3] =3D bme680_compensate_gas(data, adc_gas_res, gas_range= ); + + /* Push to buffer */ + iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, + iio_get_time_ns(indio_dev)); +out: + iio_trigger_notify_done(indio_dev->trig); + return IRQ_HANDLED; +} + int bme680_core_probe(struct device *dev, struct regmap *regmap, const char *name) { @@ -938,6 +1064,7 @@ int bme680_core_probe(struct device *dev, struct regma= p *regmap, indio_dev->name =3D name; indio_dev->channels =3D bme680_channels; indio_dev->num_channels =3D ARRAY_SIZE(bme680_channels); + indio_dev->available_scan_masks =3D bme680_avail_scan_masks; indio_dev->info =3D &bme680_info; 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([2a04:ee41:82:7577:b243:5cd3:bfdd:a16e]) by smtp.googlemail.com with ESMTPSA id ffacd0b85a97d-381c113e5cbsm8081570f8f.80.2024.11.02.06.13.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 02 Nov 2024 06:13:28 -0700 (PDT) From: Vasileios Amoiridis To: jic23@kernel.org, lars@metafoo.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andriy.shevchenko@linux.intel.com Cc: vassilisamir@gmail.com, anshulusr@gmail.com, gustavograzs@gmail.com, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 4/7] iio: chemical: bme680: Add support for preheat current Date: Sat, 2 Nov 2024 14:13:08 +0100 Message-ID: <20241102131311.36210-5-vassilisamir@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241102131311.36210-1-vassilisamir@gmail.com> References: <20241102131311.36210-1-vassilisamir@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add functionality to inject a specified amount of current to the heating plate before the start of the gas measurement to allow the sensor to reach faster to the requested temperature. Signed-off-by: Vasileios Amoiridis --- drivers/iio/chemical/bme680.h | 1 + drivers/iio/chemical/bme680_core.c | 41 ++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+) diff --git a/drivers/iio/chemical/bme680.h b/drivers/iio/chemical/bme680.h index a0a7794543c8..00ab89b3138b 100644 --- a/drivers/iio/chemical/bme680.h +++ b/drivers/iio/chemical/bme680.h @@ -42,6 +42,7 @@ #define BME680_RHRANGE_MASK GENMASK(5, 4) #define BME680_REG_RES_HEAT_VAL 0x00 #define BME680_RSERROR_MASK GENMASK(7, 4) +#define BME680_REG_IDAC_HEAT_0 0x50 #define BME680_REG_RES_HEAT_0 0x5A #define BME680_REG_GAS_WAIT_0 0x64 #define BME680_ADC_GAS_RES GENMASK(15, 6) diff --git a/drivers/iio/chemical/bme680_core.c b/drivers/iio/chemical/bme6= 80_core.c index 6df87383c243..6cc1cb9e0477 100644 --- a/drivers/iio/chemical/bme680_core.c +++ b/drivers/iio/chemical/bme680_core.c @@ -118,6 +118,7 @@ struct bme680_data { u8 oversampling_temp; u8 oversampling_press; u8 oversampling_humid; + u8 preheat_curr_mA; u16 heater_dur; u16 heater_temp; =20 @@ -214,6 +215,12 @@ static const struct iio_chan_spec bme680_channels[] = =3D { }, }, IIO_CHAN_SOFT_TIMESTAMP(4), + { + .type =3D IIO_CURRENT, + .info_mask_separate =3D BIT(IIO_CHAN_INFO_PROCESSED), + .output =3D 1, + .scan_index =3D -1, + }, }; =20 static int bme680_read_calib(struct bme680_data *data, @@ -561,6 +568,12 @@ static u8 bme680_calc_heater_dur(u16 dur) return durval; } =20 +/* Taken from datasheet, section 5.3.3 */ +static u8 bme680_calc_heater_preheat_current(u8 curr) +{ + return 8 * curr - 1; +} + static int bme680_set_mode(struct bme680_data *data, enum bme680_op_mode m= ode) { struct device *dev =3D regmap_get_device(data->regmap); @@ -659,6 +672,20 @@ static int bme680_chip_config(struct bme680_data *data) return 0; } =20 +static int bme680_preheat_curr_config(struct bme680_data *data, u8 val) +{ + struct device *dev =3D regmap_get_device(data->regmap); + u8 heatr_curr; + int ret; + + heatr_curr =3D bme680_calc_heater_preheat_current(val); + ret =3D regmap_write(data->regmap, BME680_REG_IDAC_HEAT_0, heatr_curr); + if (ret < 0) + dev_err(dev, "failed to write idac_heat_0 register\n"); + + return ret; +} + static int bme680_gas_config(struct bme680_data *data) { struct device *dev =3D regmap_get_device(data->regmap); @@ -687,6 +714,10 @@ static int bme680_gas_config(struct bme680_data *data) return ret; } =20 + ret =3D bme680_preheat_curr_config(data, data->preheat_curr_mA); + if (ret) + return ret; + /* Enable the gas sensor and select heater profile set-point 0 */ ret =3D regmap_update_bits(data->regmap, BME680_REG_CTRL_GAS_1, BME680_RUN_GAS_MASK | BME680_NB_CONV_MASK, @@ -939,6 +970,15 @@ static int bme680_write_raw(struct iio_dev *indio_dev, =20 return bme680_chip_config(data); } + case IIO_CHAN_INFO_PROCESSED: + { + switch (chan->type) { + case IIO_CURRENT: + return bme680_preheat_curr_config(data, (u8)val); + default: + return -EINVAL; + } + } default: return -EINVAL; } @@ -1074,6 +1114,7 @@ int bme680_core_probe(struct device *dev, struct regm= ap *regmap, data->oversampling_temp =3D 8; /* 8X oversampling rate */ data->heater_temp =3D 320; 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([2a04:ee41:82:7577:b243:5cd3:bfdd:a16e]) by smtp.googlemail.com with ESMTPSA id ffacd0b85a97d-381c113e5cbsm8081570f8f.80.2024.11.02.06.13.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 02 Nov 2024 06:13:29 -0700 (PDT) From: Vasileios Amoiridis To: jic23@kernel.org, lars@metafoo.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andriy.shevchenko@linux.intel.com Cc: vassilisamir@gmail.com, anshulusr@gmail.com, gustavograzs@gmail.com, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 5/7] dt-bindings: iio: bosch,bme680: Add supply properties Date: Sat, 2 Nov 2024 14:13:09 +0100 Message-ID: <20241102131311.36210-6-vassilisamir@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241102131311.36210-1-vassilisamir@gmail.com> References: <20241102131311.36210-1-vassilisamir@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Extend dt-binding for BME680 gas sensor device. The device incorporates as well temperature, pressure and relative humidity sensors. Signed-off-by: Vasileios Amoiridis --- .../bindings/iio/chemical/bosch,bme680.yaml | 62 +++++++++++++++++++ .../devicetree/bindings/trivial-devices.yaml | 2 - 2 files changed, 62 insertions(+), 2 deletions(-) create mode 100644 Documentation/devicetree/bindings/iio/chemical/bosch,bm= e680.yaml diff --git a/Documentation/devicetree/bindings/iio/chemical/bosch,bme680.ya= ml b/Documentation/devicetree/bindings/iio/chemical/bosch,bme680.yaml new file mode 100644 index 000000000000..0eac22e465e7 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/chemical/bosch,bme680.yaml @@ -0,0 +1,62 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/chemical/bosch,bme680.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Bosch BME680 Gas sensor + +maintainers: + - Vasileios Amoiridis + +description: > + BME680 is a gas sensor which combines relative humidity, barometric pres= sure, + ambient temperature and gas (VOC - Volatile Organic Compounds) measureme= nts. + + https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheet= s/bst-bme680-ds001.pdf + +properties: + compatible: + const: bosch,bme680 + + reg: + maxItems: 1 + + vdd-supply: true + vddio-supply: true + +required: + - compatible + - reg + +allOf: + - $ref: /schemas/spi/spi-peripheral-props.yaml# + +unevaluatedProperties: false + +examples: + - | + i2c { + #address-cells =3D <1>; + #size-cells =3D <0>; + + bme680@77 { + compatible =3D "bosch,bme680"; + reg =3D <0x77>; + vddio-supply =3D <&vddio>; + vdd-supply =3D <&vdd>; + }; + }; + - | + spi { + #address-cells =3D <1>; + #size-cells =3D <0>; + + bme680@0 { + compatible =3D "bosch,bme680"; + reg =3D <0>; + spi-max-frequency =3D <500000>; + vddio-supply =3D <&vddio>; + vdd-supply =3D <&vdd>; + }; + }; diff --git a/Documentation/devicetree/bindings/trivial-devices.yaml b/Docum= entation/devicetree/bindings/trivial-devices.yaml index 9bf0fb17a05e..b651826e2d21 100644 --- a/Documentation/devicetree/bindings/trivial-devices.yaml +++ b/Documentation/devicetree/bindings/trivial-devices.yaml @@ -55,8 +55,6 @@ properties: - atmel,atsha204a # BPA-RS600: Power Supply - blutek,bpa-rs600 - # Bosch Sensortec pressure, temperature, humididty and VOC sen= sor - - bosch,bme680 # CM32181: Ambient Light Sensor - capella,cm32181 # CM3232: Ambient Light Sensor --=20 2.43.0 From nobody Sun Nov 24 19:31:56 2024 Received: from mail-wr1-f42.google.com (mail-wr1-f42.google.com [209.85.221.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A148319D065; 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Signed-off-by: Vasileios Amoiridis --- drivers/iio/chemical/bme680_core.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/iio/chemical/bme680_core.c b/drivers/iio/chemical/bme6= 80_core.c index 6cc1cb9e0477..31769e0df7c2 100644 --- a/drivers/iio/chemical/bme680_core.c +++ b/drivers/iio/chemical/bme680_core.c @@ -15,6 +15,7 @@ #include #include #include +#include =20 #include #include @@ -111,6 +112,10 @@ enum bme680_scan { BME680_GAS, }; =20 +static const char *const bme680_supply_names[] =3D { "vdd", "vddio" }; + +#define BME680_NUM_SUPPLIES ARRAY_SIZE(bme680_supply_names) + struct bme680_data { struct regmap *regmap; struct bme680_calib bme680; @@ -1116,6 +1121,14 @@ int bme680_core_probe(struct device *dev, struct reg= map *regmap, data->heater_dur =3D 150; /* milliseconds */ data->preheat_curr_mA =3D 0; =20 + ret =3D devm_regulator_bulk_get_enable(dev, BME680_NUM_SUPPLIES, + bme680_supply_names); + if (ret) + return dev_err_probe(dev, ret, + "failed to get and enable supplies.\n"); 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([2a04:ee41:82:7577:b243:5cd3:bfdd:a16e]) by smtp.googlemail.com with ESMTPSA id ffacd0b85a97d-381c113e5cbsm8081570f8f.80.2024.11.02.06.13.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 02 Nov 2024 06:13:31 -0700 (PDT) From: Vasileios Amoiridis To: jic23@kernel.org, lars@metafoo.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andriy.shevchenko@linux.intel.com Cc: vassilisamir@gmail.com, anshulusr@gmail.com, gustavograzs@gmail.com, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 7/7] iio: chemical: bme680: add power management Date: Sat, 2 Nov 2024 14:13:11 +0100 Message-ID: <20241102131311.36210-8-vassilisamir@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241102131311.36210-1-vassilisamir@gmail.com> References: <20241102131311.36210-1-vassilisamir@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add runtime power management to the device. Signed-off-by: Vasileios Amoiridis --- drivers/iio/chemical/bme680.h | 2 + drivers/iio/chemical/bme680_core.c | 104 +++++++++++++++++++++++++++-- drivers/iio/chemical/bme680_i2c.c | 1 + drivers/iio/chemical/bme680_spi.c | 1 + 4 files changed, 101 insertions(+), 7 deletions(-) diff --git a/drivers/iio/chemical/bme680.h b/drivers/iio/chemical/bme680.h index 00ab89b3138b..7d86ed8b02e6 100644 --- a/drivers/iio/chemical/bme680.h +++ b/drivers/iio/chemical/bme680.h @@ -2,6 +2,7 @@ #ifndef BME680_H_ #define BME680_H_ =20 +#include #include =20 #define BME680_REG_CHIP_ID 0xD0 @@ -80,6 +81,7 @@ #define BME680_CALIB_RANGE_3_LEN 5 =20 extern const struct regmap_config bme680_regmap_config; +extern const struct dev_pm_ops bme680_dev_pm_ops; =20 int bme680_core_probe(struct device *dev, struct regmap *regmap, const char *name); diff --git a/drivers/iio/chemical/bme680_core.c b/drivers/iio/chemical/bme6= 80_core.c index 31769e0df7c2..61d095f1d2f6 100644 --- a/drivers/iio/chemical/bme680_core.c +++ b/drivers/iio/chemical/bme680_core.c @@ -14,6 +14,8 @@ #include #include #include +#include +#include #include #include =20 @@ -822,9 +824,9 @@ static int bme680_read_gas(struct bme680_data *data, in= t *comp_gas_res) return 0; } =20 -static int bme680_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int *val, int *val2, long mask) +static int __bme680_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) { struct bme680_data *data =3D iio_priv(indio_dev); int chan_val, ret; @@ -937,14 +939,30 @@ static int bme680_read_raw(struct iio_dev *indio_dev, } } =20 +static int bme680_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct bme680_data *data =3D iio_priv(indio_dev); + struct device *dev =3D regmap_get_device(data->regmap); + int ret; + + pm_runtime_get_sync(dev); + ret =3D __bme680_read_raw(indio_dev, chan, val, val2, mask); + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + + return ret; +} + static bool bme680_is_valid_oversampling(int rate) { return (rate > 0 && rate <=3D 16 && is_power_of_2(rate)); } =20 -static int bme680_write_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int val, int val2, long mask) +static int __bme680_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) { struct bme680_data *data =3D iio_priv(indio_dev); =20 @@ -989,6 +1007,22 @@ static int bme680_write_raw(struct iio_dev *indio_dev, } } =20 +static int bme680_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + struct bme680_data *data =3D iio_priv(indio_dev); + struct device *dev =3D regmap_get_device(data->regmap); + int ret; + + pm_runtime_get_sync(dev); + ret =3D __bme680_write_raw(indio_dev, chan, val, val2, mask); + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + + return ret; +} + static const char bme680_oversampling_ratio_show[] =3D "1 2 4 8 16"; =20 static IIO_CONST_ATTR(oversampling_ratio_available, @@ -1091,6 +1125,30 @@ static irqreturn_t bme680_trigger_handler(int irq, v= oid *p) return IRQ_HANDLED; } =20 +static int bme680_buffer_preenable(struct iio_dev *indio_dev) +{ + struct bme680_data *data =3D iio_priv(indio_dev); + struct device *dev =3D regmap_get_device(data->regmap); + + pm_runtime_get_sync(dev); + return 0; +} + +static int bme680_buffer_postdisable(struct iio_dev *indio_dev) +{ + struct bme680_data *data =3D iio_priv(indio_dev); + struct device *dev =3D regmap_get_device(data->regmap); + + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + return 0; +} + +static const struct iio_buffer_setup_ops bme680_buffer_setup_ops =3D { + .preenable =3D bme680_buffer_preenable, + .postdisable =3D bme680_buffer_postdisable, +}; + int bme680_core_probe(struct device *dev, struct regmap *regmap, const char *name) { @@ -1164,15 +1222,47 @@ int bme680_core_probe(struct device *dev, struct re= gmap *regmap, ret =3D devm_iio_triggered_buffer_setup(dev, indio_dev, iio_pollfunc_store_time, bme680_trigger_handler, - NULL); + &bme680_buffer_setup_ops); if (ret) return dev_err_probe(dev, ret, "iio triggered buffer setup failed\n"); =20 + /* Enable runtime PM */ + pm_runtime_set_autosuspend_delay(dev, BME680_STARTUP_TIME_US); + pm_runtime_use_autosuspend(dev); + pm_runtime_set_active(dev); + ret =3D devm_pm_runtime_enable(dev); + if (ret) + return ret; + return devm_iio_device_register(dev, indio_dev); } EXPORT_SYMBOL_NS_GPL(bme680_core_probe, IIO_BME680); =20 +static int bme680_runtime_suspend(struct device *dev) +{ + struct iio_dev *indio_dev =3D dev_get_drvdata(dev); + struct bme680_data *data =3D iio_priv(indio_dev); + + return bme680_set_mode(data, BME680_MODE_SLEEP); +} + +static int bme680_runtime_resume(struct device *dev) +{ + struct iio_dev *indio_dev =3D dev_get_drvdata(dev); + struct bme680_data *data =3D iio_priv(indio_dev); + int ret; + + ret =3D bme680_chip_config(data); + if (ret) + return ret; + + return bme680_gas_config(data); +} + +EXPORT_RUNTIME_DEV_PM_OPS(bme680_dev_pm_ops, bme680_runtime_suspend, + bme680_runtime_resume, NULL); + MODULE_AUTHOR("Himanshu Jha "); MODULE_DESCRIPTION("Bosch BME680 Driver"); MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/chemical/bme680_i2c.c b/drivers/iio/chemical/bme68= 0_i2c.c index 7c4224d75955..9998d7fa3e98 100644 --- a/drivers/iio/chemical/bme680_i2c.c +++ b/drivers/iio/chemical/bme680_i2c.c @@ -51,6 +51,7 @@ static struct i2c_driver bme680_i2c_driver =3D { .driver =3D { .name =3D "bme680_i2c", .of_match_table =3D bme680_of_i2c_match, + .pm =3D pm_ptr(&bme680_dev_pm_ops), }, .probe =3D bme680_i2c_probe, .id_table =3D bme680_i2c_id, diff --git a/drivers/iio/chemical/bme680_spi.c b/drivers/iio/chemical/bme68= 0_spi.c index 7c54bd17d4b0..43d59544d903 100644 --- a/drivers/iio/chemical/bme680_spi.c +++ b/drivers/iio/chemical/bme680_spi.c @@ -154,6 +154,7 @@ static struct spi_driver bme680_spi_driver =3D { .driver =3D { .name =3D "bme680_spi", .of_match_table =3D bme680_of_spi_match, + .pm =3D pm_ptr(&bme680_dev_pm_ops), }, .probe =3D bme680_spi_probe, .id_table =3D bme680_spi_id, --=20 2.43.0