[PATCH v4 0/4] Bluetooth: hci_bcm: Additional changes for BCM4354 support

While adding support for the BCM4354, I discovered a few more things
that weren't working as they should have.

First, we disallow serdev from setting the baudrate on BCM4354. Serdev
sets the oper_speed first before calling hu->setup() in
hci_uart_setup(). On the BCM4354, this results in bcm_setup() failing
when the hci reset times out.

Next, we add support for setting the PCM parameters, which consists of
a pair of vendor specific opcodes to set the pcm parameters. The
documentation for these params are available in the brcm_patchram_plus
package (i.e. https://github.com/balena-os/brcm_patchram_plus). This is
necessary for PCM to work properly.

All changes were tested with rk3288-veyron-minnie.dts.


Changes in v4:
- Fix incorrect function name in hci_bcm

Changes in v3:
- Change disallow baudrate setting to return -EBUSY if called before
  ready. bcm_proto is no longer modified and is back to being const.
- Changed btbcm_set_pcm_params to btbcm_set_pcm_int_params
- Changed brcm,sco-routing to brcm,bt-sco-routing

Changes in v2:
- Use match data to disallow baudrate setting
- Parse pcm parameters by name instead of as a byte string
- Fix prefix for dt-bindings commit

Abhishek Pandit-Subedi (4):
  Bluetooth: hci_bcm: Disallow set_baudrate for BCM4354
  Bluetooth: btbcm: Support pcm configuration
  Bluetooth: hci_bcm: Support pcm params in dts
  dt-bindings: net: broadcom-bluetooth: Add pcm config

 .../bindings/net/broadcom-bluetooth.txt       | 11 +++
 drivers/bluetooth/btbcm.c                     | 18 +++++
 drivers/bluetooth/btbcm.h                     |  8 +++
 drivers/bluetooth/hci_bcm.c                   | 69 ++++++++++++++++++-
 4 files changed, 105 insertions(+), 1 deletion(-)

-- 
2.24.0.rc1.363.gb1bccd3e3d-goog