Re: [PATCH v3 5/5] arm64: dts: qcom: sc7180-trogdor: mark bluetooth address as broken

Doug Anderson
2024-03-19T16:11:16Z

Hi,

On Tue, Mar 19, 2024 at 8:29 AM Johan Hovold <johan+linaro@kernel.org> wrote:
>
> Several Qualcomm Bluetooth controllers lack persistent storage for the
> device address and instead one can be provided by the boot firmware
> using the 'local-bd-address' devicetree property.
>
> The Bluetooth bindings clearly states that the address should be
> specified in little-endian order, but due to a long-standing bug in the
> Qualcomm driver which reversed the address some boot firmware has been
> providing the address in big-endian order instead.
>
> The boot firmware in SC7180 Trogdor Chromebooks is known to be affected
> so mark the 'local-bd-address' property as broken to maintain backwards
> compatibility with older firmware when fixing the underlying driver bug.
>
> Note that ChromeOS always updates the kernel and devicetree in lockstep
> so that there is no need to handle backwards compatibility with older
> devicetrees.
>
> Fixes: 7ec3e67307f8 ("arm64: dts: qcom: sc7180-trogdor: add initial trogdor and lazor dt")
> Cc: stable@vger.kernel.org # 5.10
> Cc: Rob Clark <robdclark@chromium.org>
> Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
> ---
> arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi | 2 ++
> 1 file changed, 2 insertions(+)

Assuming DT bindings folks Ack the binding, this looks fine to me.

Reviewed-by: Douglas Anderson <dianders@chromium.org>