linux-kernel - Re: [PATCH V5 2/4] arm64: dts: qcom: sc7180: Add necessary pinctrl and interrupt config for BT UART

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Date:   Fri, 11 Sep 2020 10:15:40 +0000
From:   skakit@...eaurora.org
To:     Matthias Kaehlcke <mka@...omium.org>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        gregkh@...uxfoundation.org, Andy Gross <agross@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, akashast@...eaurora.org,
        rojay@...eaurora.org, msavaliy@....qualcomm.com,
        dianders@...omium.org
Subject: Re: [PATCH V5 2/4] arm64: dts: qcom: sc7180: Add necessary pinctrl
 and interrupt config for BT UART

Hi Matthias,

On 2020-09-10 21:05, Matthias Kaehlcke wrote:
> El Thu, Sep 10, 2020 at 06:23:56PM +0530 satya priya ha dit:
> 
>> Add a suitable sleep configuration for uart3 to support Bluetooth 
>> wakeup.
>> 
>> If QUP function is selected in sleep state, UART RTS/RFR is pulled 
>> high
>> during suspend and BT SoC not able to send wakeup bytes. So, configure
>> GPIO mode in sleep state to keep it low during suspend.
>> 
>> Signed-off-by: satya priya <skakit@...eaurora.org>
>> Reviewed-by: Akash Asthana <akashast@...eaurora.org>
> 
> Was this change really reviewed (privately) by Akash or are you still
> carrying forward this tag from v2? The configuration and the comments
> have change substantially since v2, IMO you should drop the tag unless
> Akash really reviewed the current version or something close to it.
> 

Okay, will drop the tag.

>> ---
>> Changes in V2:
>>  - This patch adds sleep state for BT UART. Newly added in V2.
>> 
>> Changes in V3:
>>  - Remove "output-high" for TX from both sleep and default states
>>    as it is not required. Configure pull-up for TX in sleep state.
>> 
>> Changes in V4:
>>  - As per Matthias's comment, removed drive-strength for sleep state
>>    and fixed nit-pick.
>> 
>> Changes in V5:
>>  - As per Matthias's comments, moved pinmux change for sleep state,
>>    pinctrl and interrupt config to the board specific file.
>> 
>>  arch/arm64/boot/dts/qcom/sc7180-idp.dts | 48 
>> +++++++++++++++++++++++++++++++++
>>  1 file changed, 48 insertions(+)
>> 
>> diff --git a/arch/arm64/boot/dts/qcom/sc7180-idp.dts 
>> b/arch/arm64/boot/dts/qcom/sc7180-idp.dts
>> index 04888df..e529a41 100644
>> --- a/arch/arm64/boot/dts/qcom/sc7180-idp.dts
>> +++ b/arch/arm64/boot/dts/qcom/sc7180-idp.dts
>> @@ -344,6 +344,10 @@
>>  };
>> 
>>  &uart3 {
>> +	pinctrl-names = "default", "sleep";
>> +	pinctrl-1 = <&qup_uart3_sleep>;
>> +	interrupts-extended = <&intc GIC_SPI 604 IRQ_TYPE_LEVEL_HIGH>,
>> +				<&tlmm 41 IRQ_TYPE_EDGE_FALLING>;
> 
> As Doug already said, you need to delete the 'interrupts' property now
> that we have 'interrupts-extended'.

okay.

Thanks,
Satya Priya