Some devices (e.g. CYW5557x) require autobaud mode to enable FW loading.
Autobaud mode can also be required on some boards where the controller
device is using a non-standard baud rate when first powered on.
Only a limited subset of HCI commands are supported in autobaud mode.
These patches add a DT property, "brcm,uses-autobaud-mode", to control
autobaud mode selection.
Changes v1 -> v2:
- Modify description in binding document
Hakan Jansson (2):
dt-bindings: net: broadcom-bluetooth: Add property for autobaud mode
Bluetooth: hci_bcm: Add support for FW loading in autobaud mode
.../bindings/net/broadcom-bluetooth.yaml | 9 ++++++
drivers/bluetooth/btbcm.c | 31 ++++++++++++++-----
drivers/bluetooth/btbcm.h | 8 ++---
drivers/bluetooth/hci_bcm.c | 15 +++++++--
4 files changed, 48 insertions(+), 15 deletions(-)
base-commit: 48b57999e38745b707abe233019786cc097df3c9
--
2.25.1
Some devices (e.g. CYW5557x) require autobaud mode to enable FW loading.
Autobaud mode can also be required on some boards where the controller
device is using a non-standard baud rate when first powered on.
This patch adds a property, "brcm,uses-autobaud-mode", to enable autobaud
mode selection.
Signed-off-by: Hakan Jansson <[email protected]>
---
V1 -> V2: Modify property description
.../devicetree/bindings/net/broadcom-bluetooth.yaml | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/Documentation/devicetree/bindings/net/broadcom-bluetooth.yaml b/Documentation/devicetree/bindings/net/broadcom-bluetooth.yaml
index 5aac094fd217..a29f059c21cc 100644
--- a/Documentation/devicetree/bindings/net/broadcom-bluetooth.yaml
+++ b/Documentation/devicetree/bindings/net/broadcom-bluetooth.yaml
@@ -92,6 +92,15 @@ properties:
pcm-sync-mode: slave, master
pcm-clock-mode: slave, master
+ brcm,uses-autobaud-mode:
+ type: boolean
+ description: >
+ Setting this property will make the host (driver) assert the controller
+ chip's BT_UART_CTS_N prior to asserting BT_REG_ON. This will make the
+ controller start up in autobaud mode. The controller will then detect the
+ baud rate of the first incoming (HCI Reset) command from the host and
+ subsequently use that baud rate.
+
interrupts:
items:
- description: Handle to the line HOST_WAKE used to wake
--
2.25.1