1 files changed, 64 insertions, 0 deletions
diff --git a/drivers/iio/magnetometer/rm3100-spi.c b/drivers/iio/magnetometer/rm3100-spi.c
new file mode 100644
index 000000000000..65d5eb9e4f5e
--- /dev/null
+++ b/drivers/iio/magnetometer/rm3100-spi.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Support for PNI RM3100 3-axis geomagnetic sensor on a spi bus.
+ *
+ * Copyright (C) 2018 Song Qiang <songqiang1304521@gmail.com>
+ */
+
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+
+#include "rm3100.h"
+
+static const struct regmap_config rm3100_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.rd_table = &rm3100_readable_table,
+	.wr_table = &rm3100_writable_table,
+	.volatile_table = &rm3100_volatile_table,
+
+	.read_flag_mask = 0x80,
+
+	.cache_type = REGCACHE_RBTREE,
+};
+
+static int rm3100_probe(struct spi_device *spi)
+{
+	struct regmap *regmap;
+	int ret;
+
+	/* Actually this device supports both mode 0 and mode 3. */
+	spi->mode = SPI_MODE_0;
+	/* Data rates cannot exceed 1Mbits. */
+	spi->max_speed_hz = 1000000;
+	spi->bits_per_word = 8;
+	ret = spi_setup(spi);
+	if (ret)
+		return ret;
+
+	regmap = devm_regmap_init_spi(spi, &rm3100_regmap_config);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	return rm3100_common_probe(&spi->dev, regmap, spi->irq);
+}
+
+static const struct of_device_id rm3100_dt_match[] = {
+	{ .compatible = "pni,rm3100", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, rm3100_dt_match);
+
+static struct spi_driver rm3100_driver = {
+	.driver = {
+		.name = "rm3100-spi",
+		.of_match_table = rm3100_dt_match,
+	},
+	.probe = rm3100_probe,
+};
+module_spi_driver(rm3100_driver);
+
+MODULE_AUTHOR("Song Qiang <songqiang1304521@gmail.com>");
+MODULE_DESCRIPTION("PNI RM3100 3-axis magnetometer spi driver");
+MODULE_LICENSE("GPL v2");