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AJvYcCUtW3WR/6dzh3WyRBmlYGZtQu9ChOk0LeZn3ugvK11oJfoqbLd4I0Xpq7dKbUJaIndVng/msizlIO7ogwUBNhbw5ZIjle4XhhD1mVdFBBMrGvSfH/OpD4O/2pp3ojqJfZ+wkJzw3b3GorP6g92WUAtyRysyrv42O7HNH0i6v6zRDefiYw== X-Gm-Message-State: AOJu0Ywxf1NWtfqFp1owN2/4P7WJM3nmBg97MlttfpaZD//G2cAfyyvH UOWwy8DXZWg/6Si7Yac0dIz+Ma3BlZXbZdB0e5mZu0ZBWFdXbONT X-Google-Smtp-Source: AGHT+IHJ1Gldkr21BklkLNa8tUn78tUdFexIrYrwQg8Oz2ybidiV5jFF/n93CYZLJUNrsaGZCkFVGg== X-Received: by 2002:a05:6512:e95:b0:52f:cce4:51f3 with SMTP id 2adb3069b0e04-52fd3f6b991mr3021337e87.44.1721949053785; Thu, 25 Jul 2024 16:10:53 -0700 (PDT) Received: from localhost.localdomain ([2a04:ee41:82:7577:4b59:cba2:6db8:9f30]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a7acab236e3sm115429266b.25.2024.07.25.16.10.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Jul 2024 16:10:53 -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, ang.iglesiasg@gmail.com, linus.walleij@linaro.org, biju.das.jz@bp.renesas.com, javier.carrasco.cruz@gmail.com, semen.protsenko@linaro.org, 579lpy@gmail.com, ak@it-klinger.de, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 6/7] iio: pressure: bmp280: Add data ready trigger support Date: Fri, 26 Jul 2024 01:10:38 +0200 Message-Id: <20240725231039.614536-7-vassilisamir@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240725231039.614536-1-vassilisamir@gmail.com> References: <20240725231039.614536-1-vassilisamir@gmail.com> Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The BMP3xx and BMP5xx sensors have an interrupt pin which can be used as a trigger for when there are data ready in the sensor for pick up. This use case is used along with NORMAL_MODE in the sensor, which allows the sensor to do consecutive measurements depending on the ODR rate value. The trigger pin can be configured to be open-drain or push-pull and either rising or falling edge. No support is added yet for interrupts for FIFO, WATERMARK and out of range values. Signed-off-by: Vasileios Amoiridis --- drivers/iio/pressure/bmp280-core.c | 309 ++++++++++++++++++++++++++- drivers/iio/pressure/bmp280-regmap.c | 2 +- drivers/iio/pressure/bmp280.h | 23 +- 3 files changed, 328 insertions(+), 6 deletions(-) diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c index 4a8d2ed4a9c4..4238f37b7805 100644 --- a/drivers/iio/pressure/bmp280-core.c +++ b/drivers/iio/pressure/bmp280-core.c @@ -37,12 +37,14 @@ #include #include #include +#include #include #include #include #include #include +#include #include #include @@ -1761,6 +1763,148 @@ static int bmp380_chip_config(struct bmp280_data *data) return 0; } +static void bmp380_trigger_reenable(struct iio_trigger *trig) +{ + struct bmp280_data *data = iio_trigger_get_drvdata(trig); + unsigned int tmp; + int ret; + + ret = regmap_read(data->regmap, BMP380_REG_INT_STATUS, &tmp); + if (ret) + dev_err(data->dev, "Failed to reset interrupt\n"); +} + +static int bmp380_data_rdy_trigger_set_state(struct iio_trigger *trig, + bool state) +{ + struct bmp280_data *data = iio_trigger_get_drvdata(trig); + int ret; + + guard(mutex)(&data->lock); + + ret = regmap_update_bits(data->regmap, BMP380_REG_INT_CTRL, + BMP380_INT_CTRL_DRDY_EN, + FIELD_PREP(BMP380_INT_CTRL_DRDY_EN, + state ? 1 : 0)); + if (ret) { + dev_err(data->dev, "Could not enable/disable interrupt\n"); + return ret; + } + + return 0; +} + +static const struct iio_trigger_ops bmp380_trigger_ops = { + .set_trigger_state = &bmp380_data_rdy_trigger_set_state, + .reenable = &bmp380_trigger_reenable, +}; + +static int bmp380_int_config(struct bmp280_data *data) +{ + int ret, int_cfg = FIELD_PREP(BMP380_INT_CTRL_OPEN_DRAIN, + data->trig_open_drain) | + FIELD_PREP(BMP380_INT_CTRL_LEVEL, + data->trig_active_high); + + ret = regmap_update_bits(data->regmap, BMP380_REG_INT_CTRL, + BMP380_INT_CTRL_SETTINGS_MASK, int_cfg); + if (ret) { + dev_err(data->dev, "Could not set interrupt settings\n"); + return ret; + } + + return 0; +} + +static irqreturn_t bmp380_irq_thread_handler(int irq, void *p) +{ + struct iio_dev *indio_dev = p; + struct bmp280_data *data = iio_priv(indio_dev); + unsigned int int_ctrl; + int ret; + + scoped_guard(mutex, &data->lock) { + ret = regmap_read(data->regmap, BMP380_REG_INT_STATUS, &int_ctrl); + if (ret) + return IRQ_NONE; + } + + if (FIELD_GET(BMP380_INT_STATUS_DRDY, int_ctrl)) + iio_trigger_poll_nested(data->trig); + + return IRQ_HANDLED; +} + +static int bmp380_trigger_probe(struct iio_dev *indio_dev) +{ + struct bmp280_data *data = iio_priv(indio_dev); + struct fwnode_handle *fwnode; + int ret, irq, irq_type; + struct irq_data *desc; + + fwnode = dev_fwnode(data->dev); + if (!fwnode) + return -ENODEV; + + irq = fwnode_irq_get(fwnode, 0); + if (!irq) { + dev_err(data->dev, "No interrupt found\n"); + return -ENODEV; + } + + desc = irq_get_irq_data(irq); + if (!desc) + return -EINVAL; + + irq_type = irqd_get_trigger_type(desc); + switch (irq_type) { + case IRQF_TRIGGER_RISING: + data->trig_active_high = true; + break; + case IRQF_TRIGGER_FALLING: + data->trig_active_high = false; + break; + default: + dev_err(data->dev, "Invalid interrupt type specified\n"); + return -EINVAL; + } + + data->trig_open_drain = fwnode_property_read_bool(fwnode, + "int-open-drain"); + + ret = bmp380_int_config(data); + if (ret) + return ret; + + data->trig = devm_iio_trigger_alloc(data->dev, "%s-dev%d", + indio_dev->name, + iio_device_id(indio_dev)); + if (!data->trig) + return -ENOMEM; + + data->trig->ops = &bmp380_trigger_ops; + iio_trigger_set_drvdata(data->trig, data); + + ret = devm_request_threaded_irq(data->dev, irq, NULL, + bmp380_irq_thread_handler, IRQF_ONESHOT, + indio_dev->name, indio_dev); + if (ret) { + dev_err(data->dev, "request irq failed\n"); + return ret; + } + + ret = devm_iio_trigger_register(data->dev, data->trig); + if (ret) { + dev_err(data->dev, "iio trigger register failed\n"); + return ret; + } + + indio_dev->trig = iio_trigger_get(data->trig); + + return 0; +} + + static irqreturn_t bmp380_trigger_handler(int irq, void *p) { struct iio_poll_func *pf = p; @@ -1854,6 +1998,7 @@ const struct bmp280_chip_info bmp380_chip_info = { .wait_conv = bmp380_wait_conv, .preinit = bmp380_preinit, + .trigger_probe = bmp380_trigger_probe, .trigger_handler = bmp380_trigger_handler, }; EXPORT_SYMBOL_NS(bmp380_chip_info, IIO_BMP280); @@ -2390,6 +2535,154 @@ static int bmp580_chip_config(struct bmp280_data *data) return 0; } +static void bmp580_trigger_reenable(struct iio_trigger *trig) +{ + struct bmp280_data *data = iio_trigger_get_drvdata(trig); + unsigned int tmp; + int ret; + + ret = regmap_read(data->regmap, BMP580_REG_INT_STATUS, &tmp); + if (ret) + dev_err(data->dev, "Failed to reset interrupt\n"); +} + +static int bmp580_data_rdy_trigger_set_state(struct iio_trigger *trig, + bool state) +{ + struct bmp280_data *data = iio_trigger_get_drvdata(trig); + int ret; + + guard(mutex)(&data->lock); + + ret = regmap_update_bits(data->regmap, BMP580_REG_INT_CONFIG, + BMP580_INT_CONFIG_INT_EN, + FIELD_PREP(BMP580_INT_CONFIG_INT_EN, + state ? 1 : 0)); + if (ret) { + dev_err(data->dev, "Could not enable/disable interrupt\n"); + return ret; + } + + return 0; +} + +static const struct iio_trigger_ops bmp580_trigger_ops = { + .set_trigger_state = &bmp580_data_rdy_trigger_set_state, + .reenable = &bmp580_trigger_reenable, +}; + +static int bmp580_int_config(struct bmp280_data *data) +{ + int ret, int_cfg = FIELD_PREP(BMP580_INT_CONFIG_OPEN_DRAIN, + data->trig_open_drain) | + FIELD_PREP(BMP580_INT_CONFIG_LEVEL, + data->trig_active_high); + + ret = regmap_update_bits(data->regmap, BMP580_REG_INT_CONFIG, + BMP580_INT_CONFIG_MASK, int_cfg); + if (ret) { + dev_err(data->dev, "Could not set interrupt settings\n"); + return ret; + } + + ret = regmap_set_bits(data->regmap, BMP580_REG_INT_SOURCE, + BMP580_INT_SOURCE_DRDY); + if (ret) { + dev_err(data->dev, "Could not set interrupt source\n"); + return ret; + } + + return 0; +} + +static irqreturn_t bmp580_irq_thread_handler(int irq, void *p) +{ + struct iio_dev *indio_dev = p; + struct bmp280_data *data = iio_priv(indio_dev); + unsigned int int_ctrl; + int ret; + + scoped_guard(mutex, &data->lock) { + ret = regmap_read(data->regmap, BMP580_REG_INT_STATUS, &int_ctrl); + if (ret) + return IRQ_NONE; + } + + if (FIELD_GET(BMP580_INT_STATUS_DRDY_MASK, int_ctrl)) + iio_trigger_poll_nested(data->trig); + + return IRQ_HANDLED; +} + +static int bmp580_trigger_probe(struct iio_dev *indio_dev) +{ + struct bmp280_data *data = iio_priv(indio_dev); + struct fwnode_handle *fwnode; + int ret, irq, irq_type; + struct irq_data *desc; + + fwnode = dev_fwnode(data->dev); + if (!fwnode) + return -ENODEV; + + irq = fwnode_irq_get(fwnode, 0); + if (!irq) { + dev_err(data->dev, "No interrupt found\n"); + return -ENODEV; + } + + desc = irq_get_irq_data(irq); + if (!desc) + return -EINVAL; + + irq_type = irqd_get_trigger_type(desc); + switch (irq_type) { + case IRQF_TRIGGER_RISING: + data->trig_active_high = true; + break; + case IRQF_TRIGGER_FALLING: + data->trig_active_high = false; + break; + default: + dev_err(data->dev, "Invalid interrupt type specified\n"); + return -EINVAL; + } + + data->trig_open_drain = fwnode_property_read_bool(fwnode, + "int-open-drain"); + + ret = bmp580_int_config(data); + if (ret) + return ret; + + data->trig = devm_iio_trigger_alloc(data->dev, "%s-dev%d", + indio_dev->name, + iio_device_id(indio_dev)); + if (!data->trig) + return -ENOMEM; + + data->trig->ops = &bmp580_trigger_ops; + iio_trigger_set_drvdata(data->trig, data); + + ret = devm_request_threaded_irq(data->dev, irq, NULL, + bmp580_irq_thread_handler, IRQF_ONESHOT, + indio_dev->name, indio_dev); + if (ret) { + dev_err(data->dev, "request irq failed\n"); + return ret; + } + + ret = devm_iio_trigger_register(data->dev, data->trig); + if (ret) { + dev_err(data->dev, "iio trigger register failed\n"); + return ret; + } + + indio_dev->trig = iio_trigger_get(data->trig); + + return 0; +} + static irqreturn_t bmp580_trigger_handler(int irq, void *p) { struct iio_poll_func *pf = p; @@ -2466,6 +2759,7 @@ const struct bmp280_chip_info bmp580_chip_info = { .wait_conv = bmp580_wait_conv, .preinit = bmp580_preinit, + .trigger_probe = bmp580_trigger_probe, .trigger_handler = bmp580_trigger_handler, }; EXPORT_SYMBOL_NS(bmp580_chip_info, IIO_BMP280); @@ -3013,10 +3307,17 @@ int bmp280_common_probe(struct device *dev, * however as it happens, the BMP085 shares the chip ID of BMP180 * so we look for an IRQ if we have that. */ - if (irq > 0 && (chip_id == BMP180_CHIP_ID)) { - ret = bmp085_fetch_eoc_irq(dev, name, irq, data); - if (ret) - return ret; + if (irq > 0) { + if (chip_id == BMP180_CHIP_ID) { + ret = bmp085_fetch_eoc_irq(dev, name, irq, data); + if (ret) + return ret; + } + if (data->chip_info->trigger_probe) { + ret = data->chip_info->trigger_probe(indio_dev); + if (ret) + return ret; + } } ret = data->chip_info->set_mode(data, BMP280_SLEEP); diff --git a/drivers/iio/pressure/bmp280-regmap.c b/drivers/iio/pressure/bmp280-regmap.c index d27d68edd906..cccdf8fc6c09 100644 --- a/drivers/iio/pressure/bmp280-regmap.c +++ b/drivers/iio/pressure/bmp280-regmap.c @@ -109,7 +109,7 @@ static bool bmp380_is_writeable_reg(struct device *dev, unsigned int reg) case BMP380_REG_FIFO_WATERMARK_LSB: case BMP380_REG_FIFO_WATERMARK_MSB: case BMP380_REG_POWER_CONTROL: - case BMP380_REG_INT_CONTROL: + case BMP380_REG_INT_CTRL: case BMP380_REG_IF_CONFIG: case BMP380_REG_ODR: case BMP380_REG_OSR: diff --git a/drivers/iio/pressure/bmp280.h b/drivers/iio/pressure/bmp280.h index f5d192509d61..754eda367941 100644 --- a/drivers/iio/pressure/bmp280.h +++ b/drivers/iio/pressure/bmp280.h @@ -55,8 +55,17 @@ #define BMP580_CMD_NVM_WRITE_SEQ_1 0xA0 #define BMP580_CMD_SOFT_RESET 0xB6 +#define BMP580_INT_STATUS_DRDY_MASK BIT(0) #define BMP580_INT_STATUS_POR_MASK BIT(4) +#define BMP580_INT_SOURCE_DRDY BIT(0) + +#define BMP580_INT_CONFIG_MASK GENMASK(3, 0) +#define BMP580_INT_CONFIG_LATCH BIT(0) +#define BMP580_INT_CONFIG_LEVEL BIT(1) +#define BMP580_INT_CONFIG_OPEN_DRAIN BIT(2) +#define BMP580_INT_CONFIG_INT_EN BIT(3) + #define BMP580_STATUS_CORE_RDY_MASK BIT(0) #define BMP580_STATUS_NVM_RDY_MASK BIT(1) #define BMP580_STATUS_NVM_ERR_MASK BIT(2) @@ -117,7 +126,7 @@ #define BMP380_REG_OSR 0x1C #define BMP380_REG_POWER_CONTROL 0x1B #define BMP380_REG_IF_CONFIG 0x1A -#define BMP380_REG_INT_CONTROL 0x19 +#define BMP380_REG_INT_CTRL 0x19 #define BMP380_REG_INT_STATUS 0x11 #define BMP380_REG_EVENT 0x10 #define BMP380_REG_STATUS 0x03 @@ -175,6 +184,14 @@ #define BMP380_TEMP_MEAS_OFFSET 163 #define BMP380_PRESS_MEAS_OFFSET 392 +#define BMP380_INT_STATUS_DRDY BIT(3) + +#define BMP380_INT_CTRL_SETTINGS_MASK GENMASK(2, 0) +#define BMP380_INT_CTRL_OPEN_DRAIN BIT(0) +#define BMP380_INT_CTRL_LEVEL BIT(1) +#define BMP380_INT_CTRL_LATCH BIT(2) +#define BMP380_INT_CTRL_DRDY_EN BIT(6) + #define BMP380_MIN_TEMP -4000 #define BMP380_MAX_TEMP 8500 #define BMP380_MIN_PRES 3000000 @@ -406,6 +423,9 @@ struct bmp280_data { struct regmap *regmap; struct completion done; bool use_eoc; + bool trig_open_drain; + bool trig_active_high; + struct iio_trigger *trig; const struct bmp280_chip_info *chip_info; union { struct bmp180_calib bmp180; @@ -504,6 +524,7 @@ struct bmp280_chip_info { int (*set_mode)(struct bmp280_data *data, enum bmp280_op_mode mode); int (*wait_conv)(struct bmp280_data *data); + int (*trigger_probe)(struct iio_dev *indio_dev); irqreturn_t (*trigger_handler)(int irq, void *p); };