Some BOSC0200 acpi_device-s describe two accelerometers in a single ACPI
device. Check for a companion device and handle a second i2c_client
if it is present.
Signed-off-by: Jeremy Cline <jeremy@xxxxxxxxxx>
---
drivers/iio/accel/bmc150-accel-i2c.c | 33 ++++++++++++++++++++++++++++++++-
drivers/iio/accel/bmc150-accel.h | 1 +
2 files changed, 33 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/accel/bmc150-accel-i2c.c b/drivers/iio/accel/bmc150-accel-i2c.c
index f85014fbaa12..c4557e18123c 100644
--- a/drivers/iio/accel/bmc150-accel-i2c.c
+++ b/drivers/iio/accel/bmc150-accel-i2c.c
@@ -31,6 +31,10 @@
static int bmc150_accel_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
+ int ret;
+ struct acpi_device *adev;
+ struct i2c_board_info board_info;
+ struct bmc150_accel_data *data;
struct regmap *regmap;
const char *name = NULL;
bool block_supported =
@@ -47,12 +51,39 @@ static int bmc150_accel_probe(struct i2c_client *client,
if (id)
name = id->name;
- return bmc150_accel_core_probe(&client->dev, regmap, client->irq, name,
+ ret = bmc150_accel_core_probe(&client->dev, regmap, client->irq, name,
block_supported);
+ if (ret)
+ return ret;
+
+ /*
+ * Some BOSC0200 acpi_devices describe 2 accelerometers in a single ACPI
+ * device, try instantiating a second i2c_client for an I2cSerialBusV2
+ * ACPI resource with index 1.
+ */
+ adev = ACPI_COMPANION(&client->dev);
+ if (adev && strcmp(acpi_device_hid(adev), "BOSC0200") == 0) {
+ data = i2c_get_clientdata(client);
+ memset(&board_info, 0, sizeof(board_info));
+ strlcpy(board_info.type, "bma250e", I2C_NAME_SIZE);
+ data->driver_priv = i2c_acpi_new_device(&client->dev,
+ 1, &board_info);
+ /*
+ * Don't check for bosc0200 == NULL since most BOSC0200 ACPI
+ * devices describe only one i2c_client
+ */
+ }
+
+ return ret;
}
static int bmc150_accel_remove(struct i2c_client *client)
{
+ struct bmc150_accel_data *data = i2c_get_clientdata(client);
+
+ if (data->driver_priv)
+ i2c_unregister_device(data->driver_priv);
+
return bmc150_accel_core_remove(&client->dev);
}
diff --git a/drivers/iio/accel/bmc150-accel.h b/drivers/iio/accel/bmc150-accel.h
index c38754452883..7f49a09b136f 100644
--- a/drivers/iio/accel/bmc150-accel.h
+++ b/drivers/iio/accel/bmc150-accel.h
@@ -47,6 +47,7 @@ struct bmc150_accel_data {
int ev_enable_state;
int64_t timestamp, old_timestamp; /* Only used in hw fifo mode. */
const struct bmc150_accel_chip_info *chip_info;
+ void *driver_priv;
};
struct regmap;
--
2.14.3
--
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