Re: [PATCH] arm64: dts: qcom: lemans-evk: Enable Bluetooth support

[Wei Deng <wei.deng@oss.qualcomm.com>]

Hi Dmitry,
Thanks for your comments.

On 11/10/2025 8:39 PM, Dmitry Baryshkov wrote:
> On Mon, Nov 10, 2025 at 11:27:09AM +0530, Wei Deng wrote:
>> There's a WCN6855 WiFi/Bluetooth module on an M.2 card. To make
>> Bluetooth work, we need to define the necessary device tree nodes,
>> including UART configuration and power supplies.
>>
>> Since there is no standard M.2 binding in the device tree at present,
>> the PMU is described using dedicated PMU nodes to represent the
>> internal regulators required by the module.
>>
>> The 3.3V supply for the module is assumed to come directly from the
> 
> Why do you need to assume anything?

The M.2 interface provides a 3.3V supply, which originates from the main board’s 12V rail. To represent this power hierarchy in the device tree, add a fixed 12V regulator node as the DC-IN source and link it to the 3.3V regulator node.
Will update commit message in the next patch.

> 
>> main board supply, which is 12V. To model this in the device tree, we
>> add a fixed 12V regulator node as the DC-IN source and connect it to
>> the 3.3V regulator node.
>>
>> Signed-off-by: Wei Deng <wei.deng@oss.qualcomm.com>
>> ---
>>  arch/arm64/boot/dts/qcom/lemans-evk.dts | 115 ++++++++++++++++++++++++
>>  1 file changed, 115 insertions(+)
> 
> Why do you cc stable for this patch?

I will remove the Cc: stable in the next patch.

> 

-- 
Best Regards,
Wei Deng