Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 135 insertions, 0 deletions

diff --git a/drivers/iio/pressure/ms5611_i2c.c b/drivers/iio/pressure/ms5611_i2c.c
new file mode 100644
index 0000000000..9a0f52321f
--- /dev/null
+++ b/drivers/iio/pressure/ms5611_i2c.c
@@ -0,0 +1,135 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * MS5611 pressure and temperature sensor driver (I2C bus)
+ *
+ * Copyright (c) Tomasz Duszynski <tduszyns@gmail.com>
+ *
+ * 7-bit I2C slave addresses:
+ *
+ * 0x77 (CSB pin low)
+ * 0x76 (CSB pin high)
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+
+#include <asm/unaligned.h>
+
+#include "ms5611.h"
+
+static int ms5611_i2c_reset(struct ms5611_state *st)
+{
+	return i2c_smbus_write_byte(st->client, MS5611_RESET);
+}
+
+static int ms5611_i2c_read_prom_word(struct ms5611_state *st, int index,
+				     u16 *word)
+{
+	int ret;
+
+	ret = i2c_smbus_read_word_swapped(st->client,
+			MS5611_READ_PROM_WORD + (index << 1));
+	if (ret < 0)
+		return ret;
+
+	*word = ret;
+
+	return 0;
+}
+
+static int ms5611_i2c_read_adc(struct ms5611_state *st, s32 *val)
+{
+	int ret;
+	u8 buf[3];
+
+	ret = i2c_smbus_read_i2c_block_data(st->client, MS5611_READ_ADC,
+					    3, buf);
+	if (ret < 0)
+		return ret;
+
+	*val = get_unaligned_be24(&buf[0]);
+
+	return 0;
+}
+
+static int ms5611_i2c_read_adc_temp_and_pressure(struct ms5611_state *st,
+						 s32 *temp, s32 *pressure)
+{
+	int ret;
+	const struct ms5611_osr *osr = st->temp_osr;
+
+	ret = i2c_smbus_write_byte(st->client, osr->cmd);
+	if (ret < 0)
+		return ret;
+
+	usleep_range(osr->conv_usec, osr->conv_usec + (osr->conv_usec / 10UL));
+	ret = ms5611_i2c_read_adc(st, temp);
+	if (ret < 0)
+		return ret;
+
+	osr = st->pressure_osr;
+	ret = i2c_smbus_write_byte(st->client, osr->cmd);
+	if (ret < 0)
+		return ret;
+
+	usleep_range(osr->conv_usec, osr->conv_usec + (osr->conv_usec / 10UL));
+	return ms5611_i2c_read_adc(st, pressure);
+}
+
+static int ms5611_i2c_probe(struct i2c_client *client)
+{
+	const struct i2c_device_id *id = i2c_client_get_device_id(client);
+	struct ms5611_state *st;
+	struct iio_dev *indio_dev;
+
+	if (!i2c_check_functionality(client->adapter,
+				     I2C_FUNC_SMBUS_WRITE_BYTE |
+				     I2C_FUNC_SMBUS_READ_WORD_DATA |
+				     I2C_FUNC_SMBUS_READ_I2C_BLOCK))
+		return -EOPNOTSUPP;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*st));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	st = iio_priv(indio_dev);
+	i2c_set_clientdata(client, indio_dev);
+	st->reset = ms5611_i2c_reset;
+	st->read_prom_word = ms5611_i2c_read_prom_word;
+	st->read_adc_temp_and_pressure = ms5611_i2c_read_adc_temp_and_pressure;
+	st->client = client;
+
+	return ms5611_probe(indio_dev, &client->dev, id->name, id->driver_data);
+}
+
+static const struct of_device_id ms5611_i2c_matches[] = {
+	{ .compatible = "meas,ms5611" },
+	{ .compatible = "meas,ms5607" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ms5611_i2c_matches);
+
+static const struct i2c_device_id ms5611_id[] = {
+	{ "ms5611", MS5611 },
+	{ "ms5607", MS5607 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, ms5611_id);
+
+static struct i2c_driver ms5611_driver = {
+	.driver = {
+		.name = "ms5611",
+		.of_match_table = ms5611_i2c_matches,
+	},
+	.id_table = ms5611_id,
+	.probe = ms5611_i2c_probe,
+};
+module_i2c_driver(ms5611_driver);
+
+MODULE_AUTHOR("Tomasz Duszynski <tduszyns@gmail.com>");
+MODULE_DESCRIPTION("MS5611 i2c driver");
+MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(IIO_MS5611);