From patchwork Tue May 16 11:32:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Klinger X-Patchwork-Id: 13243010 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 796A2C77B7A for ; Tue, 16 May 2023 11:32:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232954AbjEPLcd (ORCPT ); Tue, 16 May 2023 07:32:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59084 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232952AbjEPLcc (ORCPT ); Tue, 16 May 2023 07:32:32 -0400 Received: from mout.kundenserver.de (mout.kundenserver.de [212.227.126.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 63BBD18E; Tue, 16 May 2023 04:32:31 -0700 (PDT) Received: from localhost ([31.220.116.19]) by mrelayeu.kundenserver.de (mreue011 [212.227.15.167]) with ESMTPSA (Nemesis) id 1M3D3N-1q1u790aZ3-003hzl; Tue, 16 May 2023 13:32:14 +0200 Date: Tue, 16 May 2023 13:32:13 +0200 From: Andreas Klinger To: linux-iio@vger.kernel.org, devicetree@vger.kernel.org Cc: Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Angel Iglesias , linux-kernel@vger.kernel.org Subject: [PATCH v5 1/3] dt-bindings: iio: pressure: Support Honeywell mprls0025pa sensor Message-ID: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Provags-ID: V03:K1:Vffq3MgGOTKI+sFsILoLHDUpq9prObFOT0t+R8yOKq5742j+KHO EIkiZUpSIvrsjHV2t0fC2XYNTD2p1mFd1KL0Nl0hAB2fbulRJIOYGAVdMMcCK2wBiklvcfT 4ASWPPj+XWiDyjEOaI2YeMO6ReGGS14IDYS1MdtjqUGtbmG6ohpT126S2hCsp7mTS015+pu zD6xbvwz408IAHfh51BxQ== UI-OutboundReport: notjunk:1;M01:P0:4XDL6aAvKGc=;mzMEevf4c7Z2YKmN6nQ7iH4T1ec KO7GyrZvVweVQUvrqDSSsYgRO64OPgMmybEJ7Ne31k73uzetcBWZBn8jpKpsIePqBVhyUDjuG Y1S7SXkMmymI15HDhRFbhjOVHKModLUGHQ9eCg0bdHvGy/H9A3AF+ODgMLavwvJz1YMKQmm5/ srCmWYxdiKlKj6aGtPAcaUbu8oPuertkz4Nbm87dFqdbLJaB0GL9SGdoNB17rZUvq00YLiss+ jmYbnODO6BNOnhP/UR86912PQaAUV9loyy7j/HHL0PXc6WkszDD9SPvCXIsmYmT8//w6ikScK jQIPTF0k+S6AltqYLC2tYDCEtMNJzLoYDuzDli+Dys68zREOVc20IOOK9UfBnA0EmRkPjjtLy 6fIrxbFUXA9Ej23of7mYgm9E7WcQ66OVsRCgR9KPuXDlFAMvatF9pnxvKpy4mWiH5Mwjg/DES 5pVmEpQxUIbNKrjNQ7Y8MdFRnaDDq8RvWbcisRUwmCUDPSLPk5m4ZoJ0oPnh88BLYMJwO38zh qLLiEAgwxSD9tcDTvFDDuTgSQBX/2lDgK3zVJn9vd/jMU5dF9Zv/DQ5Imnc/gtHkWL/JpeLk4 1ZOgmmOCyLdIzv9JJtbBM831abRui39MNxOY+aF1LpyFLFCGxeVDpjB9wLm7PxdKJM3xahRxE vG/mQ88yFJerizl0F2mVsL201u1QeNargBf7jwJlVA== Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Honeywell mprls0025pa is a pressure sensor series. There are many different models with different pressure ranges, units and transfer functions. The range and transfer function need to be set up in the dt. Therefore new properties honeywell,pmin-pascal, honeywell,pmax-pascal, honeywell,transfer-function are introduced. Add dt-bindings. Reviewed-by: Krzysztof Kozlowski Signed-off-by: Andreas Klinger --- .../iio/pressure/honeywell,mprls0025pa.yaml | 104 ++++++++++++++++++ 1 file changed, 104 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/pressure/honeywell,mprls0025pa.yaml diff --git a/Documentation/devicetree/bindings/iio/pressure/honeywell,mprls0025pa.yaml b/Documentation/devicetree/bindings/iio/pressure/honeywell,mprls0025pa.yaml new file mode 100644 index 000000000000..c0a923febf13 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/pressure/honeywell,mprls0025pa.yaml @@ -0,0 +1,104 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/pressure/honeywell,mprls0025pa.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Honeywell mprls0025pa pressure sensor + +maintainers: + - Andreas Klinger + +description: | + Honeywell pressure sensor of model mprls0025pa. + + This sensor has an I2C and SPI interface. Only the I2C interface is + implemented. + + There are many models with different pressure ranges available. The vendor + calls them "mpr series". All of them have the identical programming model and + differ in the pressure range, unit and transfer function. + + To support different models one need to specify the pressure range as well as + the transfer function. Pressure range needs to be converted from its unit to + pascal. + + The transfer function defines the ranges of numerical values delivered by the + sensor. The minimal range value stands for the minimum pressure and the + maximum value also for the maximum pressure with linear relation inside the + range. + + Specifications about the devices can be found at: + https://prod-edam.honeywell.com/content/dam/honeywell-edam/sps/siot/en-us/ + products/sensors/pressure-sensors/board-mount-pressure-sensors/ + micropressure-mpr-series/documents/ + sps-siot-mpr-series-datasheet-32332628-ciid-172626.pdf + +properties: + compatible: + const: honeywell,mprls0025pa + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + reset-gpios: + description: + Optional GPIO for resetting the device. + If not present the device is not resetted during the probe. + maxItems: 1 + + honeywell,pmin-pascal: + description: + Minimum pressure value the sensor can measure in pascal. + $ref: /schemas/types.yaml#/definitions/uint32 + + honeywell,pmax-pascal: + description: + Maximum pressure value the sensor can measure in pascal. + $ref: /schemas/types.yaml#/definitions/uint32 + + honeywell,transfer-function: + description: | + Transfer function which defines the range of valid values delivered by the + sensor. + 1 - A, 10% to 90% of 2^24 (1677722 .. 15099494) + 2 - B, 2.5% to 22.5% of 2^24 (419430 .. 3774874) + 3 - C, 20% to 80% of 2^24 (3355443 .. 13421773) + $ref: /schemas/types.yaml#/definitions/uint32 + + vdd-supply: + description: provide VDD power to the sensor. + +required: + - compatible + - reg + - honeywell,pmin-pascal + - honeywell,pmax-pascal + - honeywell,transfer-function + - vdd-supply + +additionalProperties: false + +examples: + - | + #include + #include + i2c { + #address-cells = <1>; + #size-cells = <0>; + + pressure@18 { + compatible = "honeywell,mprls0025pa"; + reg = <0x18>; + reset-gpios = <&gpio3 19 GPIO_ACTIVE_HIGH>; + interrupt-parent = <&gpio3>; + interrupts = <21 IRQ_TYPE_EDGE_FALLING>; + honeywell,pmin-pascal = <0>; + honeywell,pmax-pascal = <172369>; + honeywell,transfer-function = <1>; + vdd-supply = <&vcc_3v3>; + }; + }; From patchwork Tue May 16 11:32:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Klinger X-Patchwork-Id: 13243011 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4EDB3C77B7A for ; Tue, 16 May 2023 11:33:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232987AbjEPLdK (ORCPT ); Tue, 16 May 2023 07:33:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59720 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232979AbjEPLdI (ORCPT ); Tue, 16 May 2023 07:33:08 -0400 Received: from mout.kundenserver.de (mout.kundenserver.de [212.227.126.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 631FE40E6; Tue, 16 May 2023 04:33:03 -0700 (PDT) Received: from localhost ([31.220.116.19]) by mrelayeu.kundenserver.de (mreue010 [212.227.15.167]) with ESMTPSA (Nemesis) id 1MvavG-1qH6l93hg6-00scnr; Tue, 16 May 2023 13:32:45 +0200 Date: Tue, 16 May 2023 13:32:45 +0200 From: Andreas Klinger To: linux-iio@vger.kernel.org, devicetree@vger.kernel.org Cc: Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Angel Iglesias , linux-kernel@vger.kernel.org Subject: [PATCH v5 2/3] iio: pressure: Honeywell mprls0025pa pressure sensor Message-ID: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Provags-ID: V03:K1:odsbCmwJfem77pCBNnwyDEVY92NPK6fQdIR60C/kJqVolCKDeZj lyeA9CHFWjnLCRAO8pxW7psC++xan4GHFFht464CJHtm5vqh28jG9I5ly3fQd4zS9DWwaX5 361+bt4v5Xhm2ikSHUmg9bc+Zb1k+30FAw8xciCZNEdfhSIipcjcrA6QSAqj9HXAfgLIfFc rdKywaYjnK8qJ+xu8IDTw== UI-OutboundReport: notjunk:1;M01:P0:onoy9+0gZN8=;YsqUphqSoxGv+mTC9bpY4vZg/aj qEgfW6bhVIJCh0Lq6xWPhfqmyX50iRY8sO76k4TTwkl5dmDyveao//uicrNRLL1EUxQo0L5nW P6H0gYEFd2Cyyy6O3YHeYbXcF2FEk8JFRSu8VbS+HQ273EkNCLeO/UkeQg6MDyUvEZr9IHXYh 0jW+O12UO7M67VabjBYlpagq+Trrz/Ot6dRaDF940zt3ZAhYqLlTspq4PLENbMoYC0JTlp5tr TSYybOpOWG5OHdeQKQQhNzEIqSKnD+KFgiuQfH8DaZ0OFm8ccVgtOwu4QZ0H82C5MMVb3g8sG FDBNJmQMSgQeBwxH1V/9r/fFHaJ34eZs2ZuzhoMP4LQtCjzb9yiji5OjpkENP1UMBSxztiuvw xHfo6dulfWCI6xlqaajHoVFpyPHMcgj/q/tTaEx4cz8cjZfBndLsMS86aDneR7nByp9m91d3J wyyvw/iVIwfGN/FEDdL06OTQa4KHFcEa5Te294pmv6PoteHnAckFw2qAQ7k2aBiab5F/NH++i AWR3SZlIbZm4paJp57qDwf1S0W9HfU63j/gHPMneQc2ozUb9ROSgAJXEPZyWWYnZl/QU9xrfp 1f35JOqDY7Hd6JacqrZm7+kOSXOSDKmyMa1MeIrTlQjkxPtwpAB7rqjiYuZj6u3xf2EdfW6KU YkPTx5UdWCSt96WknrI3/Zb+i3JXa1F0AQitl+Oh1w== Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Honeywell mprls0025pa is a series of pressure sensors. Add initial I2C support. Note: - IIO buffered mode is supported - SPI mode is not supported Signed-off-by: Andreas Klinger --- drivers/iio/pressure/Kconfig | 13 + drivers/iio/pressure/Makefile | 1 + drivers/iio/pressure/mprls0025pa.c | 450 +++++++++++++++++++++++++++++ 3 files changed, 464 insertions(+) create mode 100644 drivers/iio/pressure/mprls0025pa.c diff --git a/drivers/iio/pressure/Kconfig b/drivers/iio/pressure/Kconfig index c9453389e4f7..43aef35ce778 100644 --- a/drivers/iio/pressure/Kconfig +++ b/drivers/iio/pressure/Kconfig @@ -148,6 +148,19 @@ config MPL3115 To compile this driver as a module, choose M here: the module will be called mpl3115. +config MPRLS0025PA + tristate "Honeywell MPRLS0025PA (MicroPressure sensors series)" + depends on I2C + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + help + Say Y here to build support for the Honeywell MicroPressure pressure + sensor series. There are many different types with different pressure + range. These ranges can be set up in the device tree. + + To compile this driver as a module, choose M here: the module will be + called mprls0025pa. + config MS5611 tristate "Measurement Specialties MS5611 pressure sensor driver" select IIO_BUFFER diff --git a/drivers/iio/pressure/Makefile b/drivers/iio/pressure/Makefile index 083ae87ff48f..c90f77210e94 100644 --- a/drivers/iio/pressure/Makefile +++ b/drivers/iio/pressure/Makefile @@ -19,6 +19,7 @@ obj-$(CONFIG_MPL115) += mpl115.o obj-$(CONFIG_MPL115_I2C) += mpl115_i2c.o obj-$(CONFIG_MPL115_SPI) += mpl115_spi.o obj-$(CONFIG_MPL3115) += mpl3115.o +obj-$(CONFIG_MPRLS0025PA) += mprls0025pa.o obj-$(CONFIG_MS5611) += ms5611_core.o obj-$(CONFIG_MS5611_I2C) += ms5611_i2c.o obj-$(CONFIG_MS5611_SPI) += ms5611_spi.o diff --git a/drivers/iio/pressure/mprls0025pa.c b/drivers/iio/pressure/mprls0025pa.c new file mode 100644 index 000000000000..06f40e47c68e --- /dev/null +++ b/drivers/iio/pressure/mprls0025pa.c @@ -0,0 +1,450 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * MPRLS0025PA - Honeywell MicroPressure pressure sensor series driver + * + * Copyright (c) Andreas Klinger + * + * Data sheet: + * https://prod-edam.honeywell.com/content/dam/honeywell-edam/sps/siot/en-us/ + * products/sensors/pressure-sensors/board-mount-pressure-sensors/ + * micropressure-mpr-series/documents/ + * sps-siot-mpr-series-datasheet-32332628-ciid-172626.pdf + * + * 7-bit I2C default slave address: 0x18 + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include +#include +#include +#include + +#include + +#include + +/* bits in i2c status byte */ +#define MPR_I2C_POWER BIT(6) /* device is powered */ +#define MPR_I2C_BUSY BIT(5) /* device is busy */ +#define MPR_I2C_MEMORY BIT(2) /* integrity test passed */ +#define MPR_I2C_MATH BIT(0) /* internal math saturation */ + +/* + * support _RAW sysfs interface: + * + * Calculation formula from the datasheet: + * pressure = (press_cnt - outputmin) * scale + pmin + * with: + * * pressure - measured pressure in Pascal + * * press_cnt - raw value read from sensor + * * pmin - minimum pressure range value of sensor (data->pmin) + * * pmax - maximum pressure range value of sensor (data->pmax) + * * outputmin - minimum numerical range raw value delivered by sensor + * (mpr_func_spec.output_min) + * * outputmax - maximum numerical range raw value delivered by sensor + * (mpr_func_spec.output_max) + * * scale - (pmax - pmin) / (outputmax - outputmin) + * + * formula of the userspace: + * pressure = (raw + offset) * scale + * + * Values given to the userspace in sysfs interface: + * * raw - press_cnt + * * offset - (-1 * outputmin) - pmin / scale + * note: With all sensors from the datasheet pmin = 0 + * which reduces the offset to (-1 * outputmin) + */ + +/* + * transfer function A: 10% to 90% of 2^24 + * transfer function B: 2.5% to 22.5% of 2^24 + * transfer function C: 20% to 80% of 2^24 + */ +enum mpr_func_id { + MPR_FUNCTION_A, + MPR_FUNCTION_B, + MPR_FUNCTION_C, +}; + +struct mpr_func_spec { + u32 output_min; + u32 output_max; +}; + +static const struct mpr_func_spec mpr_func_spec[] = { + [MPR_FUNCTION_A] = {.output_min = 1677722, .output_max = 15099494}, + [MPR_FUNCTION_B] = {.output_min = 419430, .output_max = 3774874}, + [MPR_FUNCTION_C] = {.output_min = 3355443, .output_max = 13421773}, +}; + +struct mpr_chan { + s32 pres; /* pressure value */ + s64 ts; /* timestamp */ +}; + +struct mpr_data { + struct i2c_client *client; + struct mutex lock; /* + * access to device during read + */ + u32 pmin; /* minimal pressure in pascal */ + u32 pmax; /* maximal pressure in pascal */ + enum mpr_func_id function; /* transfer function */ + u32 outmin; /* + * minimal numerical range raw + * value from sensor + */ + u32 outmax; /* + * maximal numerical range raw + * value from sensor + */ + int scale; /* int part of scale */ + int scale2; /* nano part of scale */ + int offset; /* int part of offset */ + int offset2; /* nano part of offset */ + struct gpio_desc *gpiod_reset; /* reset */ + int irq; /* + * end of conversion irq; + * used to distinguish between + * irq mode and reading in a + * loop until data is ready + */ + struct completion completion; /* handshake from irq to read */ + struct mpr_chan chan; /* + * channel values for buffered + * mode + */ +}; + +static const struct iio_chan_spec mpr_channels[] = { + { + .type = IIO_PRESSURE, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | + BIT(IIO_CHAN_INFO_OFFSET), + .scan_index = 0, + .scan_type = { + .sign = 's', + .realbits = 32, + .storagebits = 32, + .endianness = IIO_CPU, + }, + }, + IIO_CHAN_SOFT_TIMESTAMP(1), +}; + +static void mpr_reset(struct mpr_data *data) +{ + if (data->gpiod_reset) { + gpiod_set_value(data->gpiod_reset, 0); + udelay(10); + gpiod_set_value(data->gpiod_reset, 1); + } +} + +/** + * mpr_read_pressure() - Read pressure value from sensor via I2C + * @data: Pointer to private data struct. + * @press: Output value read from sensor. + * + * Reading from the sensor by sending and receiving I2C telegrams. + * + * If there is an end of conversion (EOC) interrupt registered the function + * waits for a maximum of one second for the interrupt. + * + * Context: The function can sleep and data->lock should be held when calling it + * Return: + * * 0 - OK, the pressure value could be read + * * -ETIMEDOUT - Timeout while waiting for the EOC interrupt or busy flag is + * still set after nloops attempts of reading + */ +static int mpr_read_pressure(struct mpr_data *data, s32 *press) +{ + struct device *dev = &data->client->dev; + int ret, i; + u8 wdata[] = {0xAA, 0x00, 0x00}; + s32 status; + int nloops = 10; + u8 buf[4]; + + reinit_completion(&data->completion); + + ret = i2c_master_send(data->client, wdata, sizeof(wdata)); + if (ret < 0) { + dev_err(dev, "error while writing ret: %d\n", ret); + return ret; + } + if (ret != sizeof(wdata)) { + dev_err(dev, "received size doesn't fit - ret: %d / %u\n", ret, + (u32)sizeof(wdata)); + return -EIO; + } + + if (data->irq > 0) { + ret = wait_for_completion_timeout(&data->completion, HZ); + if (!ret) { + dev_err(dev, "timeout while waiting for eoc irq\n"); + return -ETIMEDOUT; + } + } else { + /* wait until status indicates data is ready */ + for (i = 0; i < nloops; i++) { + /* + * datasheet only says to wait at least 5 ms for the + * data but leave the maximum response time open + * --> let's try it nloops (10) times which seems to be + * quite long + */ + usleep_range(5000, 10000); + status = i2c_smbus_read_byte(data->client); + if (status < 0) { + dev_err(dev, + "error while reading, status: %d\n", + status); + return status; + } + if (!(status & MPR_I2C_BUSY)) + break; + } + if (i == nloops) { + dev_err(dev, "timeout while reading\n"); + return -ETIMEDOUT; + } + } + + ret = i2c_master_recv(data->client, buf, sizeof(buf)); + if (ret < 0) { + dev_err(dev, "error in i2c_master_recv ret: %d\n", ret); + return ret; + } + if (ret != sizeof(buf)) { + dev_err(dev, "received size doesn't fit - ret: %d / %u\n", ret, + (u32)sizeof(buf)); + return -EIO; + } + + if (buf[0] & MPR_I2C_BUSY) { + /* + * it should never be the case that status still indicates + * business + */ + dev_err(dev, "data still not ready: %08x\n", buf[0]); + return -ETIMEDOUT; + } + + *press = get_unaligned_be24(&buf[1]); + + dev_dbg(dev, "received: %*ph cnt: %d\n", ret, buf, *press); + + return 0; +} + +static irqreturn_t mpr_eoc_handler(int irq, void *p) +{ + struct mpr_data *data = p; + + complete(&data->completion); + + return IRQ_HANDLED; +} + +static irqreturn_t mpr_trigger_handler(int irq, void *p) +{ + int ret; + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct mpr_data *data = iio_priv(indio_dev); + + mutex_lock(&data->lock); + ret = mpr_read_pressure(data, &data->chan.pres); + if (ret < 0) + goto err; + + iio_push_to_buffers_with_timestamp(indio_dev, &data->chan, + iio_get_time_ns(indio_dev)); + +err: + mutex_unlock(&data->lock); + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + +static int mpr_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, int *val2, long mask) +{ + int ret; + s32 pressure; + struct mpr_data *data = iio_priv(indio_dev); + + if (chan->type != IIO_PRESSURE) + return -EINVAL; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + mutex_lock(&data->lock); + ret = mpr_read_pressure(data, &pressure); + mutex_unlock(&data->lock); + if (ret < 0) + return ret; + *val = pressure; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + *val = data->scale; + *val2 = data->scale2; + return IIO_VAL_INT_PLUS_NANO; + case IIO_CHAN_INFO_OFFSET: + *val = data->offset; + *val2 = data->offset2; + return IIO_VAL_INT_PLUS_NANO; + default: + return -EINVAL; + } +} + +static const struct iio_info mpr_info = { + .read_raw = &mpr_read_raw, +}; + +static int mpr_probe(struct i2c_client *client) +{ + int ret; + struct mpr_data *data; + struct iio_dev *indio_dev; + struct device *dev = &client->dev; + s64 scale, offset; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_READ_BYTE)) + return dev_err_probe(dev, -EOPNOTSUPP, + "I2C functionality not supported\n"); + + indio_dev = devm_iio_device_alloc(dev, sizeof(*data)); + if (!indio_dev) + return dev_err_probe(dev, -ENOMEM, "couldn't get iio_dev\n"); + + data = iio_priv(indio_dev); + data->client = client; + data->irq = client->irq; + + mutex_init(&data->lock); + init_completion(&data->completion); + + indio_dev->name = "mprls0025pa"; + indio_dev->info = &mpr_info; + indio_dev->channels = mpr_channels; + indio_dev->num_channels = ARRAY_SIZE(mpr_channels); + indio_dev->modes = INDIO_DIRECT_MODE; + + ret = devm_regulator_get_enable(dev, "vdd"); + if (ret) + return dev_err_probe(dev, ret, + "can't get and enable vdd supply\n"); + + if (dev_fwnode(dev)) { + ret = device_property_read_u32(dev, "honeywell,pmin-pascal", + &data->pmin); + if (ret) + return dev_err_probe(dev, ret, + "honeywell,pmin-pascal could not be read\n"); + ret = device_property_read_u32(dev, "honeywell,pmax-pascal", + &data->pmax); + if (ret) + return dev_err_probe(dev, ret, + "honeywell,pmax-pascal could not be read\n"); + ret = device_property_read_u32(dev, + "honeywell,transfer-function", &data->function); + if (ret) + return dev_err_probe(dev, ret, + "honeywell,transfer-function could not be read\n"); + if (data->function > MPR_FUNCTION_C) + return dev_err_probe(dev, -EINVAL, + "honeywell,transfer-function %d invalid\n", + data->function); + } else { + /* when loaded as i2c device we need to use default values */ + dev_notice(dev, "firmware node not found; using defaults\n"); + data->pmin = 0; + data->pmax = 172369; /* 25 psi */ + data->function = MPR_FUNCTION_A; + } + + data->outmin = mpr_func_spec[data->function].output_min; + data->outmax = mpr_func_spec[data->function].output_max; + + /* use 64 bit calculation for preserving a reasonable precision */ + scale = div_s64(((s64)(data->pmax - data->pmin)) * NANO, + data->outmax - data->outmin); + data->scale = div_s64_rem(scale, NANO, &data->scale2); + /* + * multiply with NANO before dividing by scale and later divide by NANO + * again. + */ + offset = ((-1LL) * (s64)data->outmin) * NANO - + div_s64(div_s64((s64)data->pmin * NANO, scale), NANO); + data->offset = div_s64_rem(offset, NANO, &data->offset2); + + if (data->irq > 0) { + ret = devm_request_irq(dev, data->irq, mpr_eoc_handler, + IRQF_TRIGGER_RISING, client->name, data); + if (ret) + return dev_err_probe(dev, ret, + "request irq %d failed\n", data->irq); + } + + data->gpiod_reset = devm_gpiod_get_optional(dev, "reset", + GPIOD_OUT_HIGH); + if (IS_ERR(data->gpiod_reset)) + return dev_err_probe(dev, PTR_ERR(data->gpiod_reset), + "request reset-gpio failed\n"); + + mpr_reset(data); + + ret = devm_iio_triggered_buffer_setup(dev, indio_dev, NULL, + mpr_trigger_handler, NULL); + if (ret) + return dev_err_probe(dev, ret, + "iio triggered buffer setup failed\n"); + + ret = devm_iio_device_register(dev, indio_dev); + if (ret) + return dev_err_probe(dev, ret, + "unable to register iio device\n"); + + return 0; +} + +static const struct of_device_id mpr_matches[] = { + { .compatible = "honeywell,mprls0025pa" }, + { } +}; +MODULE_DEVICE_TABLE(of, mpr_matches); + +static const struct i2c_device_id mpr_id[] = { + { "mprls0025pa" }, + { } +}; +MODULE_DEVICE_TABLE(i2c, mpr_id); + +static struct i2c_driver mpr_driver = { + .probe_new = mpr_probe, + .id_table = mpr_id, + .driver = { + .name = "mprls0025pa", + .of_match_table = mpr_matches, + }, +}; +module_i2c_driver(mpr_driver); + +MODULE_AUTHOR("Andreas Klinger "); +MODULE_DESCRIPTION("Honeywell MPRLS0025PA I2C driver"); +MODULE_LICENSE("GPL"); From patchwork Tue May 16 11:33:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Klinger X-Patchwork-Id: 13243012 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 404F5C77B7A for ; Tue, 16 May 2023 11:33:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232528AbjEPLdy (ORCPT ); Tue, 16 May 2023 07:33:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60466 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232951AbjEPLdx (ORCPT ); Tue, 16 May 2023 07:33:53 -0400 Received: from mout.kundenserver.de (mout.kundenserver.de [212.227.126.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 885A31706; Tue, 16 May 2023 04:33:33 -0700 (PDT) Received: from localhost ([31.220.116.19]) by mrelayeu.kundenserver.de (mreue011 [212.227.15.167]) with ESMTPSA (Nemesis) id 1Mgebs-1qfvqJ3NM4-00h9en; Tue, 16 May 2023 13:33:15 +0200 Date: Tue, 16 May 2023 13:33:15 +0200 From: Andreas Klinger To: linux-iio@vger.kernel.org, devicetree@vger.kernel.org Cc: Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Angel Iglesias , linux-kernel@vger.kernel.org Subject: [PATCH v5 3/3] MAINTAINERS: Add Honeywell mprls0025pa sensor Message-ID: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Provags-ID: V03:K1:peVyRgwjHFGVxMrgmPGl1jAtQyPNxbiY2xOEXrNk74SQiTDEaK0 6fHP1dR5YNNj/93fBEGOXD0bvPRahRQOJMHWQGe+8XBEr0ohqW2+9rfyzYQhOFW2KNNgAui 8IsIK4BqemzPnxrCWXiZ2WM9qNOlOVqw4iOX3BJ1/1RkgW8IF0WjbpKv288sE1NUMY+O5yl XJos9c+Gsl+Hs2gf7uflA== UI-OutboundReport: notjunk:1;M01:P0:07K7YA//TZ8=;iyp6BNkczS70A5Qz2B5EnqB8xe9 1X4yUpGVtd8+1cpl0xH8+yq/d5aoYktFtEijleXqRIKh+YFr6y7XhiuRBU3VkopY8Hv/v+hGV 5si6mI+aOmiZE5sg308j0eYjDdKIkz+lPZLZWmGOLC9/yTroRihRoYHctEIe9PG4MUqvKzx4h CPECRMoGybiPW3yw/xlCDCCbWjWjx3+zeyAb07w8L66i9U5adCVCPO3W0+zxn3cJwBAKJMIbL wYklWISxPKe7ZbFno6Mq/tmddc9XNeLnKekGTR8ZgdRedtjITihGP7g38CAH3jNaRwqstNXkJ RgJHnyPzobgp6sFui5nKvE60D8K4jeFiw1cAyQ633iPyk0sOLj3B2vWVc+eDmHl+cqcKY4ya8 GnVN3DWP+esjaB0+na0KSFEBcDe12nKTMJtlIwj9SYgCvfXs+B8yqDq38c/JDUKhCGsw28Ho4 TXe+t0d+kffDoNHJhOfqz52p65FGEg8YOoRFIRXmHc6Jrm0YbzZVSwB/lx5DhEGOXZnKQFYQV oPgNw9wCUv0SxODLLlRmtiDHbCUP2T4ec8aM0Gn+i/JXp1lEsm5Lm0q4VVnFI2II4KCVfuP4+ GXBHl5l+R8ae90rbGY17dulxp1qjj1GdIp3zKt/rqcGIgguHp4kSLmignlO0XPfUdKgRT0u9q cj5IQ9nQBqvG1BAEIvWeJIEgOCHlDBqEQYknzG5cBQ== Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Add myself as a maintainer for Honeywell mprls0025pa sensor. Signed-off-by: Andreas Klinger --- MAINTAINERS | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index c6545eb54104..7b68ec3fba88 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -9361,6 +9361,13 @@ F: lib/test_hmm* F: mm/hmm* F: tools/testing/selftests/mm/*hmm* +HONEYWELL MPRLS0025PA PRESSURE SENSOR SERIES IIO DRIVER +M: Andreas Klinger +L: linux-iio@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/iio/pressure/honeywell,mprls0025pa.yaml +F: drivers/iio/pressure/mprls0025pa.c + HOST AP DRIVER M: Jouni Malinen L: linux-wireless@vger.kernel.org