Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
93 lines
2.2 KiB
C
93 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* MPRLS0025PA - Honeywell MicroPressure MPR series SPI sensor driver
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*
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* Copyright (c) 2024 Petre Rodan <petre.rodan@subdimension.ro>
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*
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* Data sheet:
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* 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
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*/
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/spi/spi.h>
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#include <linux/stddef.h>
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#include <linux/types.h>
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#include "mprls0025pa.h"
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struct mpr_spi_buf {
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u8 tx[MPR_MEASUREMENT_RD_SIZE] __aligned(IIO_DMA_MINALIGN);
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};
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static int mpr_spi_init(struct device *dev)
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{
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struct spi_device *spi = to_spi_device(dev);
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struct mpr_spi_buf *buf;
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buf = devm_kzalloc(dev, sizeof(*buf), GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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spi_set_drvdata(spi, buf);
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return 0;
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}
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static int mpr_spi_xfer(struct mpr_data *data, const u8 cmd, const u8 pkt_len)
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{
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struct spi_device *spi = to_spi_device(data->dev);
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struct mpr_spi_buf *buf = spi_get_drvdata(spi);
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struct spi_transfer xfer;
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if (pkt_len > MPR_MEASUREMENT_RD_SIZE)
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return -EOVERFLOW;
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buf->tx[0] = cmd;
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xfer.tx_buf = buf->tx;
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xfer.rx_buf = data->buffer;
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xfer.len = pkt_len;
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return spi_sync_transfer(spi, &xfer, 1);
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}
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static const struct mpr_ops mpr_spi_ops = {
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.init = mpr_spi_init,
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.read = mpr_spi_xfer,
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.write = mpr_spi_xfer,
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};
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static int mpr_spi_probe(struct spi_device *spi)
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{
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return mpr_common_probe(&spi->dev, &mpr_spi_ops, spi->irq);
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}
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static const struct of_device_id mpr_spi_match[] = {
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{ .compatible = "honeywell,mprls0025pa" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, mpr_spi_match);
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static const struct spi_device_id mpr_spi_id[] = {
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{ "mprls0025pa" },
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{ }
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};
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MODULE_DEVICE_TABLE(spi, mpr_spi_id);
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static struct spi_driver mpr_spi_driver = {
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.driver = {
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.name = "mprls0025pa",
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.of_match_table = mpr_spi_match,
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},
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.probe = mpr_spi_probe,
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.id_table = mpr_spi_id,
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};
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module_spi_driver(mpr_spi_driver);
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MODULE_AUTHOR("Petre Rodan <petre.rodan@subdimension.ro>");
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MODULE_DESCRIPTION("Honeywell MPR pressure sensor spi driver");
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MODULE_LICENSE("GPL");
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MODULE_IMPORT_NS("IIO_HONEYWELL_MPRLS0025PA");
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