This patch adds the ACPI match table for ASUS ROG ALLY to load the bmi323
driver with an ACPI match of "BOSC0200", and a comment about duplicate
ACPI identifiers between devices using the bmc150 and bmi323 chips.
With the remarks below,
Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Signed-off-by: Jonathan LoBue <jlobue10@xxxxxxxxx>
Co-developed-by: Luke D. Jones <luke@xxxxxxxxxx>
Signed-off-by: Luke D. Jones <luke@xxxxxxxxxx>
Co-developed-by: Denis Benato <benato.denis96@xxxxxxxxx>
Signed-off-by: Denis Benato <benato.denis96@xxxxxxxxx>
Co-developed-by: Antheas Kapenekakis <lkml@xxxxxxxxxxx>
Signed-off-by: Antheas Kapenekakis <lkml@xxxxxxxxxxx>
---
drivers/iio/imu/bmi323/bmi323_i2c.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/iio/imu/bmi323/bmi323_i2c.c b/drivers/iio/imu/bmi323/bmi323_i2c.c
index 20a8001b9956..f7550503e47e 100644
--- a/drivers/iio/imu/bmi323/bmi323_i2c.c
+++ b/drivers/iio/imu/bmi323/bmi323_i2c.c
@@ -93,6 +93,25 @@ static int bmi323_i2c_probe(struct i2c_client *i2c)
return bmi323_core_probe(dev);
}
+static const struct acpi_device_id bmi323_acpi_match[] = {
+ /*
+ * The "BOSC0200" identifier used here is not unique to bmi323 devices.
+ * The same "BOSC0200" identifier is found in the ACPI tables of devices
+ * using the bmc150 chip. This creates a conflict with duplicate ACPI
+ * identifiers which multiple drivers want to use. If a non-bmi323 device
+ * starts to load with this "BOSC0200" ACPI match here, then the chip
+ * ID check portion should fail because the chip IDs received (via i2c) are
+ * unique between bmc150 and bmi323 and the driver should relinquish the
+ * device. If and when a different driver (such as bmc150) starts to load
+ * with the "BOSC0200" ACPI match, a short reset should ensure that the
+ * device is not in a bad state during that driver initialization. This
+ * device reset does occur in both the bmi323 and bmc150 init sequences.
+ */
+ { "BOSC0200" },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, bmi323_acpi_match);
+
static const struct i2c_device_id bmi323_i2c_ids[] = {
{ "bmi323" },
{ }
@@ -109,6 +128,7 @@ static struct i2c_driver bmi323_i2c_driver = {
.driver = {
.name = "bmi323",
.of_match_table = bmi323_of_i2c_match,
+ .acpi_match_table = bmi323_acpi_match,
},
.probe = bmi323_i2c_probe,
.id_table = bmi323_i2c_ids,
--
2.43.0
