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Message-ID: <20231229092445.30180-11-petre.rodan@subdimension.ro>
Date: Fri, 29 Dec 2023 11:24:38 +0200
From: Petre Rodan <petre.rodan@...dimension.ro>
To: linux-iio@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: Petre Rodan <petre.rodan@...dimension.ro>,
Andreas Klinger <ak@...klinger.de>,
Jonathan Cameron <jic23@...nel.org>,
Lars-Peter Clausen <lars@...afoo.de>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Angel Iglesias <ang.iglesiasg@...il.com>,
Matti Vaittinen <mazziesaccount@...il.com>
Subject: [PATCH v3 10/10] iio: pressure: mprls0025pa add SPI driver
Add SPI component of the driver.
Tested with mprls0015pa0000sa in spi mode on BeagleBone Black on
slightly patched 6.7.0-rc6 mainline.
Tested with mprls0025pa in i2c mode on BeagleBone Black with togreg
branch on
git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git
(tag: iio-for-6.8a)
Tested-by: Andreas Klinger <ak@...klinger.de>
Signed-off-by: Petre Rodan <petre.rodan@...dimension.ro>
---
v2 -> v3 removed iio.h include line
drivers/iio/pressure/Kconfig | 8 ++-
drivers/iio/pressure/Makefile | 1 +
drivers/iio/pressure/mprls0025pa_spi.c | 89 ++++++++++++++++++++++++++
3 files changed, 97 insertions(+), 1 deletion(-)
create mode 100644 drivers/iio/pressure/mprls0025pa_spi.c
diff --git a/drivers/iio/pressure/Kconfig b/drivers/iio/pressure/Kconfig
index f03007cfec85..5da7931dc537 100644
--- a/drivers/iio/pressure/Kconfig
+++ b/drivers/iio/pressure/Kconfig
@@ -181,8 +181,9 @@ config MPL3115
config MPRLS0025PA
tristate "Honeywell MPRLS0025PA (MicroPressure sensors series)"
- depends on I2C
+ depends on (I2C || SPI_MASTER)
select MPRLS0025PA_I2C if I2C
+ select MPRLS0025PA_SPI if SPI_MASTER
select IIO_BUFFER
select IIO_TRIGGERED_BUFFER
help
@@ -198,6 +199,11 @@ config MPRLS0025PA_I2C
depends on MPRLS0025PA
depends on I2C
+config MPRLS0025PA_SPI
+ tristate
+ depends on MPRLS0025PA
+ depends on SPI_MASTER
+
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 7754135e190c..a93709e35760 100644
--- a/drivers/iio/pressure/Makefile
+++ b/drivers/iio/pressure/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_MPL115_SPI) += mpl115_spi.o
obj-$(CONFIG_MPL3115) += mpl3115.o
obj-$(CONFIG_MPRLS0025PA) += mprls0025pa.o
obj-$(CONFIG_MPRLS0025PA_I2C) += mprls0025pa_i2c.o
+obj-$(CONFIG_MPRLS0025PA_SPI) += mprls0025pa_spi.o
obj-$(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_spi.c b/drivers/iio/pressure/mprls0025pa_spi.c
new file mode 100644
index 000000000000..32f6c2e60380
--- /dev/null
+++ b/drivers/iio/pressure/mprls0025pa_spi.c
@@ -0,0 +1,89 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * MPRLS0025PA - Honeywell MicroPressure MPR series SPI sensor driver
+ *
+ * Copyright (c) 2024 Petre Rodan <petre.rodan@...dimension.ro>
+ *
+ * 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
+ */
+
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <linux/stddef.h>
+
+#include "mprls0025pa.h"
+
+struct mpr_spi_buf {
+ u8 tx[MPR_MEASUREMENT_RD_SIZE] __aligned(IIO_DMA_MINALIGN);
+};
+
+static int mpr_spi_init(struct device *dev)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ struct mpr_spi_buf *buf;
+
+ buf = devm_kzalloc(dev, sizeof(*buf), GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ spi_set_drvdata(spi, buf);
+
+ return 0;
+}
+
+static int mpr_spi_xfer(struct mpr_data *data, const u8 cmd, const u8 pkt_len)
+{
+ struct spi_device *spi = to_spi_device(data->dev);
+ struct mpr_spi_buf *buf = spi_get_drvdata(spi);
+ struct spi_transfer xfer;
+
+ if (pkt_len > MPR_MEASUREMENT_RD_SIZE)
+ return -EOVERFLOW;
+
+ buf->tx[0] = cmd;
+ xfer.tx_buf = buf->tx;
+ xfer.rx_buf = data->buffer;
+ xfer.len = pkt_len;
+
+ return spi_sync_transfer(spi, &xfer, 1);
+}
+
+static const struct mpr_ops mpr_spi_ops = {
+ .init = mpr_spi_init,
+ .read = mpr_spi_xfer,
+ .write = mpr_spi_xfer,
+};
+
+static int mpr_spi_probe(struct spi_device *spi)
+{
+ return mpr_common_probe(&spi->dev, &mpr_spi_ops, spi->irq);
+}
+
+static const struct of_device_id mpr_spi_match[] = {
+ { .compatible = "honeywell,mprls0025pa" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, mpr_spi_match);
+
+static const struct spi_device_id mpr_spi_id[] = {
+ { "mprls0025pa" },
+ {}
+};
+MODULE_DEVICE_TABLE(spi, mpr_spi_id);
+
+static struct spi_driver mpr_spi_driver = {
+ .driver = {
+ .name = "mprls0025pa",
+ .of_match_table = mpr_spi_match,
+ },
+ .probe = mpr_spi_probe,
+ .id_table = mpr_spi_id,
+};
+module_spi_driver(mpr_spi_driver);
+
+MODULE_AUTHOR("Petre Rodan <petre.rodan@...dimension.ro>");
+MODULE_DESCRIPTION("Honeywell MPR pressure sensor spi driver");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(IIO_HONEYWELL_MPRLS0025PA);
--
2.41.0
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