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Message-Id: <20250710-add_newport_driver-v2-6-bf76d8142ef2@tdk.com>
Date: Thu, 10 Jul 2025 08:58:01 +0000
From: Remi Buisson via B4 Relay <devnull+remi.buisson.tdk.com@...nel.org>
To: Jonathan Cameron <jic23@...nel.org>,
David Lechner <dlechner@...libre.com>,
Nuno Sá <nuno.sa@...log.com>,
Andy Shevchenko <andy@...nel.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
devicetree@...r.kernel.org, Remi Buisson <remi.buisson@....com>
Subject: [PATCH v2 6/8] iio: imu: inv_icm45600: add SPI driver for
inv_icm45600 driver
From: Remi Buisson <remi.buisson@....com>
Add SPI driver for InvenSense ICM-456000 devices.
Signed-off-by: Remi Buisson <remi.buisson@....com>
---
drivers/iio/imu/inv_icm45600/Kconfig | 21 +++++
drivers/iio/imu/inv_icm45600/Makefile | 5 +-
drivers/iio/imu/inv_icm45600/inv_icm45600_spi.c | 106 ++++++++++++++++++++++++
3 files changed, 131 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/imu/inv_icm45600/Kconfig b/drivers/iio/imu/inv_icm45600/Kconfig
index 5b044a954e952ffa8e44507eea42872e1f3161bc..01399d136a7ea3aa92a3a18ea455c95c0a6578b3 100644
--- a/drivers/iio/imu/inv_icm45600/Kconfig
+++ b/drivers/iio/imu/inv_icm45600/Kconfig
@@ -26,3 +26,24 @@ config INV_ICM45600_I2C
This driver can be built as a module. The module will be called
inv-icm45600-i2c.
+
+config INV_ICM45600_SPI
+ tristate "InvenSense ICM-456xx SPI driver"
+ depends on SPI_MASTER
+ select INV_ICM45600
+ select REGMAP_SPI
+ help
+ This driver supports the InvenSense ICM-456xx motion tracking
+ devices over SPI.
+ Supported devices:
+ - ICM-45605
+ - ICM-45606
+ - ICM-45608
+ - ICM-45634
+ - ICM-45686
+ - ICM-45687
+ - ICM-45688-P
+ - ICM-45689
+
+ This driver can be built as a module. The module will be called
+ inv-icm45600-spi.
diff --git a/drivers/iio/imu/inv_icm45600/Makefile b/drivers/iio/imu/inv_icm45600/Makefile
index 371585e29e92e78a30c7d40c1389548fa22a999a..244cc8aa1f79e3367ac6925504cfd9d5b918a0e6 100644
--- a/drivers/iio/imu/inv_icm45600/Makefile
+++ b/drivers/iio/imu/inv_icm45600/Makefile
@@ -7,4 +7,7 @@ inv-icm45600-y += inv_icm45600_accel.o
inv-icm45600-y += inv_icm45600_gyro.o
obj-$(CONFIG_INV_ICM45600_I2C) += inv-icm45600-i2c.o
-inv-icm45600-i2c-y += inv_icm45600_i2c.o
\ No newline at end of file
+inv-icm45600-i2c-y += inv_icm45600_i2c.o
+
+obj-$(CONFIG_INV_ICM45600_SPI) += inv-icm45600-spi.o
+inv-icm45600-spi-y += inv_icm45600_spi.o
diff --git a/drivers/iio/imu/inv_icm45600/inv_icm45600_spi.c b/drivers/iio/imu/inv_icm45600/inv_icm45600_spi.c
new file mode 100644
index 0000000000000000000000000000000000000000..2fd4ecce24bd60aa2112e1bcae3f7196504df637
--- /dev/null
+++ b/drivers/iio/imu/inv_icm45600/inv_icm45600_spi.c
@@ -0,0 +1,106 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Copyright (C) 2025 InvenSense, Inc. */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+
+#include "inv_icm45600.h"
+
+static const struct regmap_config inv_icm45600_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static int inv_icm45600_spi_bus_setup(struct inv_icm45600_state *st)
+{
+ /* Set slew rates for SPI. */
+ return regmap_update_bits(st->map, INV_ICM45600_REG_DRIVE_CONFIG0,
+ INV_ICM45600_DRIVE_CONFIG0_SPI_MASK,
+ FIELD_PREP(INV_ICM45600_DRIVE_CONFIG0_SPI_MASK,
+ INV_ICM45600_SPI_SLEW_RATE_5NS));
+}
+
+static int inv_icm45600_probe(struct spi_device *spi)
+{
+ const struct inv_icm45600_chip_info *chip_info;
+ struct regmap *regmap;
+
+ chip_info = spi_get_device_match_data(spi);
+ if (!chip_info)
+ return -ENODEV;
+
+ /* Use SPI specific regmap. */
+ regmap = devm_regmap_init_spi(spi, &inv_icm45600_regmap_config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ return inv_icm45600_core_probe(regmap, chip_info, true,
+ inv_icm45600_spi_bus_setup);
+}
+
+/*
+ * The device id table is used to identify which device is
+ * supported by this driver.
+ */
+static const struct spi_device_id inv_icm45600_id[] = {
+ { "icm45605", (kernel_ulong_t)&inv_icm45605_chip_info },
+ { "icm45606", (kernel_ulong_t)&inv_icm45606_chip_info },
+ { "icm45608", (kernel_ulong_t)&inv_icm45608_chip_info },
+ { "icm45634", (kernel_ulong_t)&inv_icm45634_chip_info },
+ { "icm45686", (kernel_ulong_t)&inv_icm45686_chip_info },
+ { "icm45687", (kernel_ulong_t)&inv_icm45687_chip_info },
+ { "icm45688p", (kernel_ulong_t)&inv_icm45688p_chip_info },
+ { "icm45689", (kernel_ulong_t)&inv_icm45689_chip_info },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, inv_icm45600_id);
+
+static const struct of_device_id inv_icm45600_of_matches[] = {
+ {
+ .compatible = "invensense,icm45605",
+ .data = &inv_icm45605_chip_info,
+ }, {
+ .compatible = "invensense,icm45606",
+ .data = &inv_icm45606_chip_info,
+ }, {
+ .compatible = "invensense,icm45608",
+ .data = &inv_icm45608_chip_info,
+ }, {
+ .compatible = "invensense,icm45634",
+ .data = &inv_icm45634_chip_info,
+ }, {
+ .compatible = "invensense,icm45686",
+ .data = &inv_icm45686_chip_info,
+ }, {
+ .compatible = "invensense,icm45687",
+ .data = &inv_icm45687_chip_info,
+ }, {
+ .compatible = "invensense,icm45688p",
+ .data = &inv_icm45688p_chip_info,
+ }, {
+ .compatible = "invensense,icm45689",
+ .data = &inv_icm45689_chip_info,
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(of, inv_icm45600_of_matches);
+
+static struct spi_driver inv_icm45600_driver = {
+ .driver = {
+ .name = "inv-icm45600-spi",
+ .of_match_table = inv_icm45600_of_matches,
+ .pm = pm_ptr(&inv_icm45600_pm_ops),
+ },
+ .id_table = inv_icm45600_id,
+ .probe = inv_icm45600_probe,
+};
+module_spi_driver(inv_icm45600_driver);
+
+MODULE_AUTHOR("InvenSense, Inc.");
+MODULE_DESCRIPTION("InvenSense ICM-456xx SPI driver");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS("IIO_ICM45600");
--
2.34.1
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