Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 281 insertions, 0 deletions

diff --git a/drivers/iio/accel/bmc150-accel-i2c.c b/drivers/iio/accel/bmc150-accel-i2c.c
new file mode 100644
index 0000000000..ee1ba134ad
--- /dev/null
+++ b/drivers/iio/accel/bmc150-accel-i2c.c
@@ -0,0 +1,281 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * 3-axis accelerometer driver supporting many I2C Bosch-Sensortec chips
+ * Copyright (c) 2014, Intel Corporation.
+ */
+
+#include <linux/device.h>
+#include <linux/mod_devicetable.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <linux/regmap.h>
+
+#include "bmc150-accel.h"
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id bmc150_acpi_dual_accel_ids[] = {
+	{"BOSC0200"},
+	{"DUAL250E"},
+	{ }
+};
+
+/*
+ * The DUAL250E ACPI device for 360° hinges type 2-in-1s with 1 accelerometer
+ * in the display and 1 in the hinge has an ACPI-method (DSM) to tell the
+ * ACPI code about the angle between the 2 halves. This will make the ACPI
+ * code enable/disable the keyboard and touchpad. We need to call this to avoid
+ * the keyboard being disabled when the 2-in-1 is turned-on or resumed while
+ * fully folded into tablet mode (which gets detected with a HALL-sensor).
+ * If we don't call this then the keyboard won't work even when the 2-in-1 is
+ * changed to be used in laptop mode after the power-on / resume.
+ *
+ * This DSM takes 2 angles, selected by setting aux0 to 0 or 1, these presumably
+ * define the angle between the gravity vector measured by the accelerometer in
+ * the display (aux0=0) resp. the base (aux0=1) and some reference vector.
+ * The 2 angles get subtracted from each other so the reference vector does
+ * not matter and we can simply leave the second angle at 0.
+ */
+
+#define BMC150_DSM_GUID				"7681541e-8827-4239-8d9d-36be7fe12542"
+#define DUAL250E_SET_ANGLE_FN_INDEX		3
+
+struct dual250e_set_angle_args {
+	u32 aux0;
+	u32 ang0;
+	u32 rawx;
+	u32 rawy;
+	u32 rawz;
+} __packed;
+
+static bool bmc150_acpi_set_angle_dsm(struct i2c_client *client, u32 aux0, u32 ang0)
+{
+	struct acpi_device *adev = ACPI_COMPANION(&client->dev);
+	struct dual250e_set_angle_args args = {
+		.aux0 = aux0,
+		.ang0 = ang0,
+	};
+	union acpi_object args_obj, *obj;
+	guid_t guid;
+
+	if (!acpi_dev_hid_uid_match(adev, "DUAL250E", NULL))
+		return false;
+
+	guid_parse(BMC150_DSM_GUID, &guid);
+
+	if (!acpi_check_dsm(adev->handle, &guid, 0, BIT(DUAL250E_SET_ANGLE_FN_INDEX)))
+		return false;
+
+	/*
+	 * Note this triggers the following warning:
+	 * "ACPI Warning: \_SB.PCI0.I2C2.ACC1._DSM: Argument #4 type mismatch -
+	 *                Found [Buffer], ACPI requires [Package]"
+	 * This is unavoidable since the _DSM implementation expects a "naked"
+	 * buffer, so wrapping it in a package will _not_ work.
+	 */
+	args_obj.type = ACPI_TYPE_BUFFER;
+	args_obj.buffer.length = sizeof(args);
+	args_obj.buffer.pointer = (u8 *)&args;
+
+	obj = acpi_evaluate_dsm(adev->handle, &guid, 0, DUAL250E_SET_ANGLE_FN_INDEX, &args_obj);
+	if (!obj) {
+		dev_err(&client->dev, "Failed to call DSM to enable keyboard and touchpad\n");
+		return false;
+	}
+
+	ACPI_FREE(obj);
+	return true;
+}
+
+static bool bmc150_acpi_enable_keyboard(struct i2c_client *client)
+{
+	/*
+	 * The EC must see a change for it to re-enable the kbd, so first
+	 * set the angle to 270° (tent/stand mode) and then change it to
+	 * 90° (laptop mode).
+	 */
+	if (!bmc150_acpi_set_angle_dsm(client, 0, 270))
+		return false;
+
+	/* The EC needs some time to notice the angle being changed */
+	msleep(100);
+
+	return bmc150_acpi_set_angle_dsm(client, 0, 90);
+}
+
+static void bmc150_acpi_resume_work(struct work_struct *work)
+{
+	struct bmc150_accel_data *data =
+		container_of(work, struct bmc150_accel_data, resume_work.work);
+
+	bmc150_acpi_enable_keyboard(data->second_device);
+}
+
+static void bmc150_acpi_resume_handler(struct device *dev)
+{
+	struct bmc150_accel_data *data = iio_priv(dev_get_drvdata(dev));
+
+	/*
+	 * Delay the bmc150_acpi_enable_keyboard() call till after the system
+	 * resume has completed, otherwise it will not work.
+	 */
+	schedule_delayed_work(&data->resume_work, msecs_to_jiffies(1000));
+}
+
+/*
+ * Some acpi_devices describe 2 accelerometers in a single ACPI device,
+ * try instantiating a second i2c_client for an I2cSerialBusV2 ACPI resource
+ * with index 1.
+ */
+static void bmc150_acpi_dual_accel_probe(struct i2c_client *client)
+{
+	struct bmc150_accel_data *data = iio_priv(i2c_get_clientdata(client));
+	struct acpi_device *adev = ACPI_COMPANION(&client->dev);
+	char dev_name[16];
+	struct i2c_board_info board_info = {
+		.type = "bmc150_accel",
+		.dev_name = dev_name,
+		.fwnode = client->dev.fwnode,
+	};
+
+	if (acpi_match_device_ids(adev, bmc150_acpi_dual_accel_ids))
+		return;
+
+	/*
+	 * The 2nd accel sits in the base of 2-in-1s. The suffix is static, as
+	 * there should never be more then 1 ACPI node with 2 accelerometers.
+	 */
+	snprintf(dev_name, sizeof(dev_name), "%s:base", acpi_device_hid(adev));
+
+	board_info.irq = acpi_dev_gpio_irq_get(adev, 1);
+
+	data->second_device = i2c_acpi_new_device(&client->dev, 1, &board_info);
+
+	if (!IS_ERR(data->second_device) && bmc150_acpi_enable_keyboard(data->second_device)) {
+		INIT_DELAYED_WORK(&data->resume_work, bmc150_acpi_resume_work);
+		data->resume_callback = bmc150_acpi_resume_handler;
+	}
+}
+
+static void bmc150_acpi_dual_accel_remove(struct i2c_client *client)
+{
+	struct bmc150_accel_data *data = iio_priv(i2c_get_clientdata(client));
+
+	if (data->resume_callback)
+		cancel_delayed_work_sync(&data->resume_work);
+
+	i2c_unregister_device(data->second_device);
+}
+#else
+static void bmc150_acpi_dual_accel_probe(struct i2c_client *client) {}
+static void bmc150_acpi_dual_accel_remove(struct i2c_client *client) {}
+#endif
+
+static int bmc150_accel_probe(struct i2c_client *client)
+{
+	const struct i2c_device_id *id = i2c_client_get_device_id(client);
+	struct regmap *regmap;
+	const char *name = NULL;
+	enum bmc150_type type = BOSCH_UNKNOWN;
+	bool block_supported =
+		i2c_check_functionality(client->adapter, I2C_FUNC_I2C) ||
+		i2c_check_functionality(client->adapter,
+					I2C_FUNC_SMBUS_READ_I2C_BLOCK);
+	int ret;
+
+	regmap = devm_regmap_init_i2c(client, &bmc150_regmap_conf);
+	if (IS_ERR(regmap)) {
+		dev_err(&client->dev, "Failed to initialize i2c regmap\n");
+		return PTR_ERR(regmap);
+	}
+
+	if (id) {
+		name = id->name;
+		type = id->driver_data;
+	}
+
+	ret = bmc150_accel_core_probe(&client->dev, regmap, client->irq,
+				      type, name, block_supported);
+	if (ret)
+		return ret;
+
+	/*
+	 * The !id check avoids recursion when probe() gets called
+	 * for the second client.
+	 */
+	if (!id && has_acpi_companion(&client->dev))
+		bmc150_acpi_dual_accel_probe(client);
+
+	return 0;
+}
+
+static void bmc150_accel_remove(struct i2c_client *client)
+{
+	bmc150_acpi_dual_accel_remove(client);
+
+	bmc150_accel_core_remove(&client->dev);
+}
+
+static const struct acpi_device_id bmc150_accel_acpi_match[] = {
+	{"BMA0255"},
+	{"BMA0280"},
+	{"BMA222"},
+	{"BMA222E"},
+	{"BMA250E"},
+	{"BMC150A"},
+	{"BMI055A"},
+	{"BOSC0200"},
+	{"BSBA0150"},
+	{"DUAL250E"},
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, bmc150_accel_acpi_match);
+
+static const struct i2c_device_id bmc150_accel_id[] = {
+	{"bma222"},
+	{"bma222e"},
+	{"bma250e"},
+	{"bma253"},
+	{"bma254"},
+	{"bma255"},
+	{"bma280"},
+	{"bmc150_accel"},
+	{"bmc156_accel", BOSCH_BMC156},
+	{"bmi055_accel"},
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, bmc150_accel_id);
+
+static const struct of_device_id bmc150_accel_of_match[] = {
+	{ .compatible = "bosch,bma222" },
+	{ .compatible = "bosch,bma222e" },
+	{ .compatible = "bosch,bma250e" },
+	{ .compatible = "bosch,bma253" },
+	{ .compatible = "bosch,bma254" },
+	{ .compatible = "bosch,bma255" },
+	{ .compatible = "bosch,bma280" },
+	{ .compatible = "bosch,bmc150_accel" },
+	{ .compatible = "bosch,bmc156_accel" },
+	{ .compatible = "bosch,bmi055_accel" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, bmc150_accel_of_match);
+
+static struct i2c_driver bmc150_accel_driver = {
+	.driver = {
+		.name	= "bmc150_accel_i2c",
+		.of_match_table = bmc150_accel_of_match,
+		.acpi_match_table = ACPI_PTR(bmc150_accel_acpi_match),
+		.pm	= &bmc150_accel_pm_ops,
+	},
+	.probe		= bmc150_accel_probe,
+	.remove		= bmc150_accel_remove,
+	.id_table	= bmc150_accel_id,
+};
+module_i2c_driver(bmc150_accel_driver);
+
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("BMC150 I2C accelerometer driver");
+MODULE_IMPORT_NS(IIO_BMC150);