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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c 
 kernel/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
....@@ -1,14 +1,6 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23 * Copyright (C) 2012 Invensense, Inc.
3
-*
4
-* This software is licensed under the terms of the GNU General Public
5
-* License version 2, as published by the Free Software Foundation, and
6
-* may be copied, distributed, and modified under those terms.
7
-*
8
-* This program is distributed in the hope that it will be useful,
9
-* but WITHOUT ANY WARRANTY; without even the implied warranty of
10
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11
-* GNU General Public License for more details.
124 */
135 
146 #include <linux/acpi.h>
....@@ -18,6 +10,7 @@
1810 #include <linux/iio/iio.h>
1911 #include <linux/module.h>
2012 #include <linux/of_device.h>
13
+#include <linux/property.h>
2114 #include "inv_mpu_iio.h"
2215 
2316 static const struct regmap_config inv_mpu_regmap_config = {
....@@ -27,53 +20,71 @@
2720 
2821 static int inv_mpu6050_select_bypass(struct i2c_mux_core *muxc, u32 chan_id)
2922 {
30
-	struct iio_dev *indio_dev = i2c_mux_priv(muxc);
31
-	struct inv_mpu6050_state *st = iio_priv(indio_dev);
32
-	int ret;
33
-
34
-	mutex_lock(&st->lock);
35
-
36
-	ret = inv_mpu6050_set_power_itg(st, true);
37
-	if (ret)
38
-		goto error_unlock;
39
-
40
-	ret = regmap_write(st->map, st->reg->int_pin_cfg,
41
-			   st->irq_mask | INV_MPU6050_BIT_BYPASS_EN);
42
-
43
-error_unlock:
44
-	mutex_unlock(&st->lock);
45
-
46
-	return ret;
47
-}
48
-
49
-static int inv_mpu6050_deselect_bypass(struct i2c_mux_core *muxc, u32 chan_id)
50
-{
51
-	struct iio_dev *indio_dev = i2c_mux_priv(muxc);
52
-	struct inv_mpu6050_state *st = iio_priv(indio_dev);
53
-
54
-	mutex_lock(&st->lock);
55
-
56
-	/* It doesn't really matter if any of the calls fail */
57
-	regmap_write(st->map, st->reg->int_pin_cfg, st->irq_mask);
58
-	inv_mpu6050_set_power_itg(st, false);
59
-
60
-	mutex_unlock(&st->lock);
61
-
6223 	return 0;
6324 }
6425 
65
-static const char *inv_mpu_match_acpi_device(struct device *dev,
66
-					     enum inv_devices *chip_id)
26
+static bool inv_mpu_i2c_aux_bus(struct device *dev)
6727 {
68
-	const struct acpi_device_id *id;
28
+	struct inv_mpu6050_state *st = iio_priv(dev_get_drvdata(dev));
6929 
70
-	id = acpi_match_device(dev->driver->acpi_match_table, dev);
71
-	if (!id)
72
-		return NULL;
30
+	switch (st->chip_type) {
31
+	case INV_ICM20608:
32
+	case INV_ICM20609:
33
+	case INV_ICM20689:
34
+	case INV_ICM20602:
35
+	case INV_IAM20680:
36
+		/* no i2c auxiliary bus on the chip */
37
+		return false;
38
+	case INV_MPU9150:
39
+	case INV_MPU9250:
40
+	case INV_MPU9255:
41
+		if (st->magn_disabled)
42
+			return true;
43
+		else
44
+			return false;
45
+	default:
46
+		return true;
47
+	}
48
+}
7349 
74
-	*chip_id = (int)id->driver_data;
50
+static int inv_mpu_i2c_aux_setup(struct iio_dev *indio_dev)
51
+{
52
+	struct inv_mpu6050_state *st = iio_priv(indio_dev);
53
+	struct device *dev = indio_dev->dev.parent;
54
+	struct device_node *mux_node;
55
+	int ret;
7556 
76
-	return dev_name(dev);
57
+	/*
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+	 * MPU9xxx magnetometer support requires to disable i2c auxiliary bus.
59
+	 * To ensure backward compatibility with existing setups, do not disable
60
+	 * i2c auxiliary bus if it used.
61
+	 * Check for i2c-gate node in devicetree and set magnetometer disabled.
62
+	 * Only MPU6500 is supported by ACPI, no need to check.
63
+	 */
64
+	switch (st->chip_type) {
65
+	case INV_MPU9150:
66
+	case INV_MPU9250:
67
+	case INV_MPU9255:
68
+		mux_node = of_get_child_by_name(dev->of_node, "i2c-gate");
69
+		if (mux_node != NULL) {
70
+			st->magn_disabled = true;
71
+			dev_warn(dev, "disable internal use of magnetometer\n");
72
+		}
73
+		of_node_put(mux_node);
74
+		break;
75
+	default:
76
+		break;
77
+	}
78
+
79
+	/* enable i2c bypass when using i2c auxiliary bus */
80
+	if (inv_mpu_i2c_aux_bus(dev)) {
81
+		ret = regmap_write(st->map, st->reg->int_pin_cfg,
82
+				   st->irq_mask | INV_MPU6050_BIT_BYPASS_EN);
83
+		if (ret)
84
+			return ret;
85
+	}
86
+
87
+	return 0;
7788 }
7889 
7990 /**
....@@ -86,6 +97,7 @@
8697 static int inv_mpu_probe(struct i2c_client *client,
8798 			 const struct i2c_device_id *id)
8899 {
100
+	const void *match;
89101 	struct inv_mpu6050_state *st;
90102 	int result;
91103 	enum inv_devices chip_type;
....@@ -96,46 +108,36 @@
96108 				     I2C_FUNC_SMBUS_I2C_BLOCK))
97109 		return -EOPNOTSUPP;
98110 
99
-	if (client->dev.of_node) {
100
-		chip_type = (enum inv_devices)
101
-			of_device_get_match_data(&client->dev);
111
+	match = device_get_match_data(&client->dev);
112
+	if (match) {
113
+		chip_type = (enum inv_devices)match;
102114 		name = client->name;
103115 	} else if (id) {
104116 		chip_type = (enum inv_devices)
105117 			id->driver_data;
106118 		name = id->name;
107
-	} else if (ACPI_HANDLE(&client->dev)) {
108
-		name = inv_mpu_match_acpi_device(&client->dev, &chip_type);
109
-		if (!name)
110
-			return -ENODEV;
111119 	} else {
112120 		return -ENOSYS;
113121 	}
114122 
115123 	regmap = devm_regmap_init_i2c(client, &inv_mpu_regmap_config);
116124 	if (IS_ERR(regmap)) {
117
-		dev_err(&client->dev, "Failed to register i2c regmap %d\n",
118
-			(int)PTR_ERR(regmap));
125
+		dev_err(&client->dev, "Failed to register i2c regmap: %pe\n",
126
+			regmap);
119127 		return PTR_ERR(regmap);
120128 	}
121129 
122130 	result = inv_mpu_core_probe(regmap, client->irq, name,
123
-				    NULL, chip_type);
131
+				    inv_mpu_i2c_aux_setup, chip_type);
124132 	if (result < 0)
125133 		return result;
126134 
127135 	st = iio_priv(dev_get_drvdata(&client->dev));
128
-	switch (st->chip_type) {
129
-	case INV_ICM20608:
130
-	case INV_ICM20602:
131
-		/* no i2c auxiliary bus on the chip */
132
-		break;
133
-	default:
136
+	if (inv_mpu_i2c_aux_bus(&client->dev)) {
134137 		/* declare i2c auxiliary bus */
135138 		st->muxc = i2c_mux_alloc(client->adapter, &client->dev,
136139 					 1, 0, I2C_MUX_LOCKED | I2C_MUX_GATE,
137
-					 inv_mpu6050_select_bypass,
138
-					 inv_mpu6050_deselect_bypass);
140
+					 inv_mpu6050_select_bypass, NULL);
139141 		if (!st->muxc)
140142 			return -ENOMEM;
141143 		st->muxc->priv = dev_get_drvdata(&client->dev);
....@@ -145,7 +147,6 @@
145147 		result = inv_mpu_acpi_create_mux_client(client);
146148 		if (result)
147149 			goto out_del_mux;
148
-		break;
149150 	}
150151 
151152 	return 0;
....@@ -180,7 +181,11 @@
180181 	{"mpu9250", INV_MPU9250},
181182 	{"mpu9255", INV_MPU9255},
182183 	{"icm20608", INV_ICM20608},
184
+	{"icm20609", INV_ICM20609},
185
+	{"icm20689", INV_ICM20689},
183186 	{"icm20602", INV_ICM20602},
187
+	{"icm20690", INV_ICM20690},
188
+	{"iam20680", INV_IAM20680},
184189 	{}
185190 };
186191 
....@@ -216,9 +221,25 @@
216221 		.data = (void *)INV_ICM20608
217222 	},
218223 	{
224
+		.compatible = "invensense,icm20609",
225
+		.data = (void *)INV_ICM20609
226
+	},
227
+	{
228
+		.compatible = "invensense,icm20689",
229
+		.data = (void *)INV_ICM20689
230
+	},
231
+	{
219232 		.compatible = "invensense,icm20602",
220233 		.data = (void *)INV_ICM20602
221234 	},
235
+	{
236
+		.compatible = "invensense,icm20690",
237
+		.data = (void *)INV_ICM20690
238
+	},
239
+	{
240
+		.compatible = "invensense,iam20680",
241
+		.data = (void *)INV_IAM20680
242
+	},
222243 	{ }
223244 };
224245 MODULE_DEVICE_TABLE(of, inv_of_match);