[PATCH] arm: dts: mt7623: enable all four available UARTs on bananapi-r2

[PATCH] arm: dts: mt7623: enable all four available UARTs on bananapi-r2

[sean.wang-NuS5LvNUpcJWk0Htik3J/w]

From: Sean Wang <sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>

On bpi-r2 board, totally there're four uarts which we usually called
uart[0-3] helpful to extend slow I/O devices. Among those ones, uart2 has
dedicated pin slot which is used to conolse log. uart[0-1] appear at the
40-pins connector and uart3 has no pinout, but just has test points (TP47
for TX and TP48 for RX, respectively) nearby uart2. Also, some missing
pinctrl is being complemented for those devices.

Signed-off-by: Sean Wang <sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
---
 arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
index 7bf5aa2..64bf5db 100644
--- a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
+++ b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
@@ -409,6 +409,20 @@
 				 <MT7623_PIN_82_UTXD1_FUNC_UTXD1>;
 		};
 	};
+
+	uart2_pins_a: uart@2 {
+		pins_dat {
+			pinmux = <MT7623_PIN_14_GPIO14_FUNC_URXD2>,
+				 <MT7623_PIN_15_GPIO15_FUNC_UTXD2>;
+		};
+	};
+
+	uart3_pins_a: uart@3 {
+		pins_dat {
+			pinmux = <MT7623_PIN_242_URTS2_FUNC_URTS2>,
+				 <MT7623_PIN_243_UCTS2_FUNC_UTXD3>;
+		};
+	};
 };
 
 &pwm {
@@ -454,16 +468,24 @@
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_pins_a>;
-	status = "disabled";
+	status = "okay";
 };
 
 &uart1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart1_pins_a>;
-	status = "disabled";
+	status = "okay";
 };
 
 &uart2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart2_pins_a>;
+	status = "okay";
+};
+
+&uart3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart3_pins_a>;
 	status = "okay";
 };
 
-- 
2.7.4

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Re: [PATCH] arm: dts: mt7623: enable all four available UARTs on bananapi-r2

[Sean Wang]

On Fri, 2017-12-22 at 14:06 +0800, sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org wrote:
> From: Sean Wang <sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
> 
> On bpi-r2 board, totally there're four uarts which we usually called
> uart[0-3] helpful to extend slow I/O devices. Among those ones, uart2 has
> dedicated pin slot which is used to conolse log. uart[0-1] appear at the

Hi, Matthias

Could you help to fix the misspelling "conolse" with "console" when you
merge the patch ?

	Sean

> 40-pins connector and uart3 has no pinout, but just has test points (TP47
> for TX and TP48 for RX, respectively) nearby uart2. Also, some missing
> pinctrl is being complemented for those devices.
> 
> Signed-off-by: Sean Wang <sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
> ---
>  arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts | 26 ++++++++++++++++++++++++--
>  1 file changed, 24 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> index 7bf5aa2..64bf5db 100644
> --- a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> +++ b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> @@ -409,6 +409,20 @@
>  				 <MT7623_PIN_82_UTXD1_FUNC_UTXD1>;
>  		};
>  	};
> +
> +	uart2_pins_a: uart@2 {
> +		pins_dat {
> +			pinmux = <MT7623_PIN_14_GPIO14_FUNC_URXD2>,
> +				 <MT7623_PIN_15_GPIO15_FUNC_UTXD2>;
> +		};
> +	};
> +
> +	uart3_pins_a: uart@3 {
> +		pins_dat {
> +			pinmux = <MT7623_PIN_242_URTS2_FUNC_URTS2>,
> +				 <MT7623_PIN_243_UCTS2_FUNC_UTXD3>;
> +		};
> +	};
>  };
>  
>  &pwm {
> @@ -454,16 +468,24 @@
>  &uart0 {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&uart0_pins_a>;
> -	status = "disabled";
> +	status = "okay";
>  };
>  
>  &uart1 {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&uart1_pins_a>;
> -	status = "disabled";
> +	status = "okay";
>  };
>  
>  &uart2 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&uart2_pins_a>;
> +	status = "okay";
> +};
> +
> +&uart3 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&uart3_pins_a>;
>  	status = "okay";
>  };
>  


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Re: [PATCH] arm: dts: mt7623: enable all four available UARTs on bananapi-r2

[Matthias Brugger]

On 12/22/2017 07:06 AM, sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org wrote:
> From: Sean Wang <sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
> 
> On bpi-r2 board, totally there're four uarts which we usually called
> uart[0-3] helpful to extend slow I/O devices. Among those ones, uart2 has
> dedicated pin slot which is used to conolse log. uart[0-1] appear at the
> 40-pins connector and uart3 has no pinout, but just has test points (TP47
> for TX and TP48 for RX, respectively) nearby uart2. Also, some missing
> pinctrl is being complemented for those devices.
> 
> Signed-off-by: Sean Wang <sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
> ---
>  arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts | 26 ++++++++++++++++++++++++--
>  1 file changed, 24 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> index 7bf5aa2..64bf5db 100644
> --- a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> +++ b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> @@ -409,6 +409,20 @@
>  				 <MT7623_PIN_82_UTXD1_FUNC_UTXD1>;
>  		};
>  	};
> +
> +	uart2_pins_a: uart@2 {
> +		pins_dat {
> +			pinmux = <MT7623_PIN_14_GPIO14_FUNC_URXD2>,
> +				 <MT7623_PIN_15_GPIO15_FUNC_UTXD2>;
> +		};
> +	};
> +
> +	uart3_pins_a: uart@3 {
> +		pins_dat {
> +			pinmux = <MT7623_PIN_242_URTS2_FUNC_URTS2>,
> +				 <MT7623_PIN_243_UCTS2_FUNC_UTXD3>;
> +		};
> +	};
>  };
>  
>  &pwm {
> @@ -454,16 +468,24 @@
>  &uart0 {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&uart0_pins_a>;
> -	status = "disabled";
> +	status = "okay";
>  };
>  
>  &uart1 {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&uart1_pins_a>;
> -	status = "disabled";
> +	status = "okay";
>  };
>  
>  &uart2 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&uart2_pins_a>;
> +	status = "okay";
> +};
> +
> +&uart3 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&uart3_pins_a>;
>  	status = "okay";
>  };
>  

Why do we want to enable uart3 when there are only test points?
It is not very useful, or do I oversee something?

Regards,
Matthias
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Re: [PATCH] arm: dts: mt7623: enable all four available UARTs on bananapi-r2

[Sean Wang]

On Sat, 2017-12-23 at 08:52 +0100, Matthias Brugger wrote:
> 
> On 12/22/2017 07:06 AM, sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org wrote:
> > From: Sean Wang <sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
> > 
> > On bpi-r2 board, totally there're four uarts which we usually called
> > uart[0-3] helpful to extend slow I/O devices. Among those ones, uart2 has
> > dedicated pin slot which is used to conolse log. uart[0-1] appear at the
> > 40-pins connector and uart3 has no pinout, but just has test points (TP47
> > for TX and TP48 for RX, respectively) nearby uart2. Also, some missing
> > pinctrl is being complemented for those devices.
> > 
> > Signed-off-by: Sean Wang <sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
> > ---
> >  arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts | 26 ++++++++++++++++++++++++--
> >  1 file changed, 24 insertions(+), 2 deletions(-)
> > 
> > diff --git a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> > index 7bf5aa2..64bf5db 100644
> > --- a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> > +++ b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> > @@ -409,6 +409,20 @@
> >  				 <MT7623_PIN_82_UTXD1_FUNC_UTXD1>;
> >  		};
> >  	};
> > +
> > +	uart2_pins_a: uart@2 {
> > +		pins_dat {
> > +			pinmux = <MT7623_PIN_14_GPIO14_FUNC_URXD2>,
> > +				 <MT7623_PIN_15_GPIO15_FUNC_UTXD2>;
> > +		};
> > +	};
> > +
> > +	uart3_pins_a: uart@3 {
> > +		pins_dat {
> > +			pinmux = <MT7623_PIN_242_URTS2_FUNC_URTS2>,
> > +				 <MT7623_PIN_243_UCTS2_FUNC_UTXD3>;
> > +		};
> > +	};
> >  };
> >  
> >  &pwm {
> > @@ -454,16 +468,24 @@
> >  &uart0 {
> >  	pinctrl-names = "default";
> >  	pinctrl-0 = <&uart0_pins_a>;
> > -	status = "disabled";
> > +	status = "okay";
> >  };
> >  
> >  &uart1 {
> >  	pinctrl-names = "default";
> >  	pinctrl-0 = <&uart1_pins_a>;
> > -	status = "disabled";
> > +	status = "okay";
> >  };
> >  
> >  &uart2 {
> > +	pinctrl-names = "default";
> > +	pinctrl-0 = <&uart2_pins_a>;
> > +	status = "okay";
> > +};
> > +
> > +&uart3 {
> > +	pinctrl-names = "default";
> > +	pinctrl-0 = <&uart3_pins_a>;
> >  	status = "okay";
> >  };
> >  
> 
> Why do we want to enable uart3 when there are only test points?
> It is not very useful, or do I oversee something?
> 

I have been listening to the sound from potential users of bpi-r2 to
understand what assistance I have to provide to them. Something could
be seen through [1] in the forum to know they had been trying hard to
explore all available UARTs from the SoC in the last weeks. The patch
should be really useful for these people and for the extra soldering
it shouldn't become a problem for these makers.

[1] http://forum.banana-pi.org/t/gpio-uart-not-the-debug-port/3748

	Sean 


> Regards,
> Matthias
> 


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Re: [PATCH] arm: dts: mt7623: enable all four available UARTs on bananapi-r2

[Sean Wang]

On Sat, 2017-12-23 at 23:35 +0800, Sean Wang wrote:
> On Sat, 2017-12-23 at 08:52 +0100, Matthias Brugger wrote:
> > 
> > On 12/22/2017 07:06 AM, sean.wang@mediatek.com wrote:
> > > From: Sean Wang <sean.wang@mediatek.com>
> > > 
> > > On bpi-r2 board, totally there're four uarts which we usually called
> > > uart[0-3] helpful to extend slow I/O devices. Among those ones, uart2 has
> > > dedicated pin slot which is used to conolse log. uart[0-1] appear at the
> > > 40-pins connector and uart3 has no pinout, but just has test points (TP47
> > > for TX and TP48 for RX, respectively) nearby uart2. Also, some missing
> > > pinctrl is being complemented for those devices.
> > > 
> > > Signed-off-by: Sean Wang <sean.wang@mediatek.com>
> > > ---
> > >  arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts | 26 ++++++++++++++++++++++++--
> > >  1 file changed, 24 insertions(+), 2 deletions(-)
> > > 
> > > diff --git a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> > > index 7bf5aa2..64bf5db 100644
> > > --- a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> > > +++ b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> > > @@ -409,6 +409,20 @@
> > >  				 <MT7623_PIN_82_UTXD1_FUNC_UTXD1>;
> > >  		};do you like it or quite want me to remove the uart3 node?
> > >  	};
> > > +
> > > +	uart2_pins_a: uart@2 {
> > > +		pins_dat {
> > > +			pinmux = <MT7623_PIN_14_GPIO14_FUNC_URXD2>,
> > > +				 <MT7623_PIN_15_GPIO15_FUNC_UTXD2>;
> > > +		};
> > > +	};
> > > +
> > > +	uart3_pins_a: uart@3 {
> > > +		pins_dat {
> > > +			pinmux = <MT7623_PIN_242_URTS2_FUNC_URTS2>,
> > > +				 <MT7623_PIN_243_UCTS2_FUNC_UTXD3>;
> > > +		};
> > > +	};
> > >  };
> > >  
> > >  &pwm {
> > > @@ -454,16 +468,24 @@
> > >  &uart0 {
> > >  	pinctrl-names = "default";
> > >  	pinctrl-0 = <&uart0_pins_a>;
> > > -	status = "disabled";
> > > +	status = "okay";
> > >  };
> > >  
> > >  &uart1 {
> > >  	pinctrl-names = "default";
> > >  	pinctrl-0 = <&uart1_pins_a>;
> > > -	status = "disabled";
> > > +	status = "okay";
> > >  };
> > >  
> > >  &uart2 {
> > > +	pinctrl-names = "default";
> > > +	pinctrl-0 = <&uart2_pins_a>;
> > > +	status = "okay";
> > > +};
> > > +
> > > +&uart3 {
> > > +	pinctrl-names = "default";
> > > +	pinctrl-0 = <&uart3_pins_a>;
> > >  	status = "okay";
> > >  };
> > >  
> > 
> > Why do we want to enable uart3 when there are only test points?
> > It is not very useful, or do I oversee something?
> > 

> I have been listening to the sound from potential users of bpi-r2 to
> understand what assistance I have to provide to them. Something could
> be seen through [1] in the forum to know they had been trying hard to
> explore all available UARTs from the SoC in the last weeks. The patch
> should be really useful for these people and for the extra soldering
> it shouldn't become a problem for these makers.
> 
> [1] http://forum.banana-pi.org/t/gpio-uart-not-the-debug-port/3748
> 
> 	Sean 
> 

Hi, Matthias

do you like it or quite want me to remove the uart3 node?

I can take it into account along with other pending dts changes in my
queue.

	Sean
> 
> > Regards,
> > Matthias
> > 
> 

Re: [PATCH] arm: dts: mt7623: enable all four available UARTs on bananapi-r2

[Matthias Brugger]

On 01/23/2018 09:51 AM, Sean Wang wrote:
> On Sat, 2017-12-23 at 23:35 +0800, Sean Wang wrote:
>> On Sat, 2017-12-23 at 08:52 +0100, Matthias Brugger wrote:
>>>
>>> On 12/22/2017 07:06 AM, sean.wang@mediatek.com wrote:
>>>> From: Sean Wang <sean.wang@mediatek.com>
>>>>
>>>> On bpi-r2 board, totally there're four uarts which we usually called
>>>> uart[0-3] helpful to extend slow I/O devices. Among those ones, uart2 has
>>>> dedicated pin slot which is used to conolse log. uart[0-1] appear at the
>>>> 40-pins connector and uart3 has no pinout, but just has test points (TP47
>>>> for TX and TP48 for RX, respectively) nearby uart2. Also, some missing
>>>> pinctrl is being complemented for those devices.
>>>>
>>>> Signed-off-by: Sean Wang <sean.wang@mediatek.com>
>>>> ---
>>>>  arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts | 26 ++++++++++++++++++++++++--
>>>>  1 file changed, 24 insertions(+), 2 deletions(-)
>>>>
>>>> diff --git a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
>>>> index 7bf5aa2..64bf5db 100644
>>>> --- a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
>>>> +++ b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
>>>> @@ -409,6 +409,20 @@
>>>>  				 <MT7623_PIN_82_UTXD1_FUNC_UTXD1>;
>>>>  		};do you like it or quite want me to remove the uart3 node?
>>>>  	};
>>>> +
>>>> +	uart2_pins_a: uart@2 {
>>>> +		pins_dat {
>>>> +			pinmux = <MT7623_PIN_14_GPIO14_FUNC_URXD2>,
>>>> +				 <MT7623_PIN_15_GPIO15_FUNC_UTXD2>;
>>>> +		};
>>>> +	};
>>>> +
>>>> +	uart3_pins_a: uart@3 {
>>>> +		pins_dat {
>>>> +			pinmux = <MT7623_PIN_242_URTS2_FUNC_URTS2>,
>>>> +				 <MT7623_PIN_243_UCTS2_FUNC_UTXD3>;
>>>> +		};
>>>> +	};
>>>>  };
>>>>  
>>>>  &pwm {
>>>> @@ -454,16 +468,24 @@
>>>>  &uart0 {
>>>>  	pinctrl-names = "default";
>>>>  	pinctrl-0 = <&uart0_pins_a>;
>>>> -	status = "disabled";
>>>> +	status = "okay";
>>>>  };
>>>>  
>>>>  &uart1 {
>>>>  	pinctrl-names = "default";
>>>>  	pinctrl-0 = <&uart1_pins_a>;
>>>> -	status = "disabled";
>>>> +	status = "okay";
>>>>  };
>>>>  
>>>>  &uart2 {
>>>> +	pinctrl-names = "default";
>>>> +	pinctrl-0 = <&uart2_pins_a>;
>>>> +	status = "okay";
>>>> +};
>>>> +
>>>> +&uart3 {
>>>> +	pinctrl-names = "default";
>>>> +	pinctrl-0 = <&uart3_pins_a>;
>>>>  	status = "okay";
>>>>  };
>>>>  
>>>
>>> Why do we want to enable uart3 when there are only test points?
>>> It is not very useful, or do I oversee something?
>>>
> 
>> I have been listening to the sound from potential users of bpi-r2 to
>> understand what assistance I have to provide to them. Something could
>> be seen through [1] in the forum to know they had been trying hard to
>> explore all available UARTs from the SoC in the last weeks. The patch
>> should be really useful for these people and for the extra soldering
>> it shouldn't become a problem for these makers.
>>
>> [1] http://forum.banana-pi.org/t/gpio-uart-not-the-debug-port/3748
>>
>> 	Sean 
>>
> 
> Hi, Matthias
> 
> do you like it or quite want me to remove the uart3 node?
> 
> I can take it into account along with other pending dts changes in my
> queue.
> 

Sorry for the late answer.
Do I understand correctly that uart3 is routed to TP47 and TP48, and these test
points are accessible through the SATA connector? Doesn't they break SATA then?

I think as they are only available through a non-documented test point, we
shouldn't enable it.

Regards,
Matthias

Re: [PATCH] arm: dts: mt7623: enable all four available UARTs on bananapi-r2

[Sean Wang]

On Wed, 2018-02-07 at 17:01 +0100, Matthias Brugger wrote:
> 
> On 01/23/2018 09:51 AM, Sean Wang wrote:
> > On Sat, 2017-12-23 at 23:35 +0800, Sean Wang wrote:
> >> On Sat, 2017-12-23 at 08:52 +0100, Matthias Brugger wrote:
> >>>
> >>> On 12/22/2017 07:06 AM, sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org wrote:
> >>>> From: Sean Wang <sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
> >>>>
> >>>> On bpi-r2 board, totally there're four uarts which we usually called
> >>>> uart[0-3] helpful to extend slow I/O devices. Among those ones, uart2 has
> >>>> dedicated pin slot which is used to conolse log. uart[0-1] appear at the
> >>>> 40-pins connector and uart3 has no pinout, but just has test points (TP47
> >>>> for TX and TP48 for RX, respectively) nearby uart2. Also, some missing
> >>>> pinctrl is being complemented for those devices.
> >>>>
> >>>> Signed-off-by: Sean Wang <sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
> >>>> ---
> >>>>  arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts | 26 ++++++++++++++++++++++++--
> >>>>  1 file changed, 24 insertions(+), 2 deletions(-)
> >>>>
> >>>> diff --git a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> >>>> index 7bf5aa2..64bf5db 100644
> >>>> --- a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> >>>> +++ b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> >>>> @@ -409,6 +409,20 @@
> >>>>  				 <MT7623_PIN_82_UTXD1_FUNC_UTXD1>;
> >>>>  		};do you like it or quite want me to remove the uart3 node?
> >>>>  	};
> >>>> +
> >>>> +	uart2_pins_a: uart@2 {
> >>>> +		pins_dat {
> >>>> +			pinmux = <MT7623_PIN_14_GPIO14_FUNC_URXD2>,
> >>>> +				 <MT7623_PIN_15_GPIO15_FUNC_UTXD2>;
> >>>> +		};
> >>>> +	};
> >>>> +
> >>>> +	uart3_pins_a: uart@3 {
> >>>> +		pins_dat {
> >>>> +			pinmux = <MT7623_PIN_242_URTS2_FUNC_URTS2>,
> >>>> +				 <MT7623_PIN_243_UCTS2_FUNC_UTXD3>;
> >>>> +		};
> >>>> +	};
> >>>>  };
> >>>>  
> >>>>  &pwm {
> >>>> @@ -454,16 +468,24 @@
> >>>>  &uart0 {
> >>>>  	pinctrl-names = "default";
> >>>>  	pinctrl-0 = <&uart0_pins_a>;
> >>>> -	status = "disabled";
> >>>> +	status = "okay";
> >>>>  };
> >>>>  
> >>>>  &uart1 {
> >>>>  	pinctrl-names = "default";
> >>>>  	pinctrl-0 = <&uart1_pins_a>;
> >>>> -	status = "disabled";
> >>>> +	status = "okay";
> >>>>  };
> >>>>  
> >>>>  &uart2 {
> >>>> +	pinctrl-names = "default";
> >>>> +	pinctrl-0 = <&uart2_pins_a>;
> >>>> +	status = "okay";
> >>>> +};
> >>>> +
> >>>> +&uart3 {
> >>>> +	pinctrl-names = "default";
> >>>> +	pinctrl-0 = <&uart3_pins_a>;
> >>>>  	status = "okay";
> >>>>  };
> >>>>  
> >>>
> >>> Why do we want to enable uart3 when there are only test points?
> >>> It is not very useful, or do I oversee something?
> >>>
> > 
> >> I have been listening to the sound from potential users of bpi-r2 to
> >> understand what assistance I have to provide to them. Something could
> >> be seen through [1] in the forum to know they had been trying hard to
> >> explore all available UARTs from the SoC in the last weeks. The patch
> >> should be really useful for these people and for the extra soldering
> >> it shouldn't become a problem for these makers.
> >>
> >> [1] http://forum.banana-pi.org/t/gpio-uart-not-the-debug-port/3748
> >>
> >> 	Sean 
> >>
> > 
> > Hi, Matthias
> > 
> > do you like it or quite want me to remove the uart3 node?
> > 
> > I can take it into account along with other pending dts changes in my
> > queue.
> > 
> 
> Sorry for the late answer.
> Do I understand correctly that uart3 is routed to TP47 and TP48, and these test
> points are accessible through the SATA connector? Doesn't they break SATA then?
> 

TP47 and TP48 are directly pins out from SoC, not through the SATA
connector.

> I think as they are only available through a non-documented test point, we
> shouldn't enable it.
> 

Okay, let's drop uart 3 setting here.

> Regards,
> Matthias


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