From: Hsin-chen Chuang <chharry@xxxxxxxxxxxx>
The functionality was completed in commit 5e5c3898ef49 ("Bluetooth: Fix
possible race with userspace of sysfs isoc_alt")
Fixes: 5e5c3898ef49 ("Bluetooth: Fix possible race with userspace of sysfs isoc_alt")
Signed-off-by: Hsin-chen Chuang <chharry@xxxxxxxxxxxx>
---
(no changes since v1)
Documentation/ABI/stable/sysfs-class-bluetooth | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/Documentation/ABI/stable/sysfs-class-bluetooth b/Documentation/ABI/stable/sysfs-class-bluetooth
index 36be02471174..8cc5f3cfe133 100644
--- a/Documentation/ABI/stable/sysfs-class-bluetooth
+++ b/Documentation/ABI/stable/sysfs-class-bluetooth
@@ -7,3 +7,17 @@ Description: This write-only attribute allows users to trigger the vendor reset
The reset may or may not be done through the device transport
(e.g., UART/USB), and can also be done through an out-of-band
approach such as GPIO.
+
+What: /sys/class/bluetooth/hci<index>/isoc_alt
+Date: 22-Jan-2025
+KernelVersion: 6.13
+Contact: linux-bluetooth@xxxxxxxxxxxxxxx
+Description: This attribute allows users to configure the USB Alternate setting
+ for the specific HCI device. Reading this attribute returns the
+ current setting, and writing any supported numbers would change
+ the setting. See the USB Alternate setting definition in Bluetooth
+ core spec 5, vol 4, part B, table 2.1.
+ If the HCI device doesn't support USB Alternate setting
+ configuration, the read/write fails with -ENODEV.
+ If the data is not a valid number, the write fails with -EINVAL.
+ The other failures are vendor specific.
--
2.48.1.262.g85cc9f2d1e-goog
