From: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>
To: jic23@kernel.org, robh+dt@kernel.org, robh@kernel.org,
mchehab+huawei@kernel.org, davem@davemloft.net,
gregkh@linuxfoundation.org
Cc: linux-iio@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>
Subject: [PATCH v3 02/13] iio: imu: inv_icm42600: add I2C driver for inv_icm42600 driver
Date: Mon, 8 Jun 2020 22:42:39 +0200 [thread overview]
Message-ID: <20200608204250.3291-3-jmaneyrol@invensense.com> (raw)
In-Reply-To: <20200608204250.3291-1-jmaneyrol@invensense.com>
Add I2C driver for InvenSense ICM-426xxx devices.
Configure bus signal slew rates as indicated in the datasheet.
Signed-off-by: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>
---
.../iio/imu/inv_icm42600/inv_icm42600_i2c.c | 100 ++++++++++++++++++
1 file changed, 100 insertions(+)
create mode 100644 drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c
new file mode 100644
index 000000000000..4789cead23b3
--- /dev/null
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c
@@ -0,0 +1,100 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2020 InvenSense, Inc.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/property.h>
+
+#include "inv_icm42600.h"
+
+static int inv_icm42600_i2c_bus_setup(struct inv_icm42600_state *st)
+{
+ unsigned int mask, val;
+ int ret;
+
+ /* setup interface registers */
+ ret = regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG6,
+ INV_ICM42600_INTF_CONFIG6_MASK,
+ INV_ICM42600_INTF_CONFIG6_I3C_EN);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG4,
+ INV_ICM42600_INTF_CONFIG4_I3C_BUS_ONLY, 0);
+ if (ret)
+ return ret;
+
+ /* set slew rates for I2C and SPI */
+ mask = INV_ICM42600_DRIVE_CONFIG_I2C_MASK |
+ INV_ICM42600_DRIVE_CONFIG_SPI_MASK;
+ val = INV_ICM42600_DRIVE_CONFIG_I2C(INV_ICM42600_SLEW_RATE_12_36NS) |
+ INV_ICM42600_DRIVE_CONFIG_SPI(INV_ICM42600_SLEW_RATE_12_36NS);
+ ret = regmap_update_bits(st->map, INV_ICM42600_REG_DRIVE_CONFIG,
+ mask, val);
+ if (ret)
+ return ret;
+
+ /* disable SPI bus */
+ return regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG0,
+ INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_MASK,
+ INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_SPI_DIS);
+}
+
+static int inv_icm42600_probe(struct i2c_client *client)
+{
+ const void *match;
+ enum inv_icm42600_chip chip;
+ struct regmap *regmap;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
+ return -ENOTSUPP;
+
+ match = device_get_match_data(&client->dev);
+ if (!match)
+ return -EINVAL;
+ chip = (enum inv_icm42600_chip)match;
+
+ regmap = devm_regmap_init_i2c(client, &inv_icm42600_regmap_config);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ return inv_icm42600_core_probe(regmap, chip, inv_icm42600_i2c_bus_setup);
+}
+
+static const struct of_device_id inv_icm42600_of_matches[] = {
+ {
+ .compatible = "invensense,icm42600",
+ .data = (void *)INV_CHIP_ICM42600,
+ }, {
+ .compatible = "invensense,icm42602",
+ .data = (void *)INV_CHIP_ICM42602,
+ }, {
+ .compatible = "invensense,icm42605",
+ .data = (void *)INV_CHIP_ICM42605,
+ }, {
+ .compatible = "invensense,icm42622",
+ .data = (void *)INV_CHIP_ICM42622,
+ },
+ {}
+};
+MODULE_DEVICE_TABLE(of, inv_icm42600_of_matches);
+
+static struct i2c_driver inv_icm42600_driver = {
+ .driver = {
+ .name = "inv-icm42600-i2c",
+ .of_match_table = inv_icm42600_of_matches,
+ .pm = &inv_icm42600_pm_ops,
+ },
+ .probe_new = inv_icm42600_probe,
+};
+module_i2c_driver(inv_icm42600_driver);
+
+MODULE_AUTHOR("InvenSense, Inc.");
+MODULE_DESCRIPTION("InvenSense ICM-426xx I2C driver");
+MODULE_LICENSE("GPL");
--
2.17.1
next prev parent reply other threads:[~2020-06-08 20:45 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-08 20:42 [PATCH v3 00/13] iio: imu: new inv_icm42600 driver Jean-Baptiste Maneyrol
2020-06-08 20:42 ` [PATCH v3 01/13] iio: imu: inv_icm42600: add core of " Jean-Baptiste Maneyrol
2020-06-08 20:42 ` Jean-Baptiste Maneyrol [this message]
2020-06-08 20:42 ` [PATCH v3 03/13] iio: imu: inv_icm42600: add SPI driver for " Jean-Baptiste Maneyrol
2020-06-08 20:42 ` [PATCH v3 04/13] iio: imu: inv_icm42600: add gyroscope IIO device Jean-Baptiste Maneyrol
2020-06-08 20:42 ` [PATCH v3 05/13] iio: imu: inv_icm42600: add accelerometer " Jean-Baptiste Maneyrol
2020-06-08 20:42 ` [PATCH v3 06/13] iio: imu: inv_icm42600: add temperature sensor support Jean-Baptiste Maneyrol
2020-06-14 15:10 ` Lars-Peter Clausen
2020-06-14 20:35 ` Jean-Baptiste Maneyrol
2020-06-20 15:57 ` Jonathan Cameron
2020-06-22 9:21 ` Jean-Baptiste Maneyrol
2020-06-08 20:42 ` [PATCH v3 07/13] iio: imu: add Kconfig and Makefile for inv_icm42600 driver Jean-Baptiste Maneyrol
2020-06-08 23:03 ` kernel test robot
2020-06-14 13:52 ` Jonathan Cameron
2020-06-08 20:42 ` [PATCH v3 08/13] Documentation: ABI: add specific icm42600 documentation Jean-Baptiste Maneyrol
2020-06-08 20:42 ` [PATCH v3 09/13] iio: imu: inv_icm42600: add device interrupt Jean-Baptiste Maneyrol
2020-06-08 20:42 ` [PATCH v3 10/13] iio: imu: inv_icm42600: add buffer support in iio devices Jean-Baptiste Maneyrol
2020-06-14 14:17 ` Jonathan Cameron
2020-06-08 20:42 ` [PATCH v3 11/13] iio: imu: inv_icm42600: add accurate timestamping Jean-Baptiste Maneyrol
2020-06-14 14:21 ` Jonathan Cameron
2020-06-08 20:42 ` [PATCH v3 12/13] dt-bindings: iio: imu: Add inv_icm42600 documentation Jean-Baptiste Maneyrol
2020-06-17 20:53 ` Rob Herring
2020-06-08 20:42 ` [PATCH v3 13/13] MAINTAINERS: add entry for inv_icm42600 6-axis imu sensor Jean-Baptiste Maneyrol
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