[PATCH v5 1/2] ARM: dts: bcm283x: Use stdout-path instead of console bootarg

[PATCH v5 1/2] ARM: dts: bcm283x: Use stdout-path instead of console bootarg

[Loic Poulain]

Add the serial port config to "chosen/stdout-path".
Create serial0/1 aliases referring to uart0 ant uart1 paths.
Remove unneeded earlyprintk.

Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Signed-off-by: Loic Poulain <loic.poulain-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 arch/arm/boot/dts/bcm283x.dtsi | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

 v2: dt-bindings as separate patch
     rebase on upcoming pi3 dts changes
 v3: changes in bcm serdev drivers:
     name refactoring and additional comments
     Add generic host_set_baudrate method
     Use agnostic device_property_read
 v4: changes in doc and dts:
     Add additional params to broadcom bt dt-bindings
     Set the max baudrate to 2000000 instead of 921600
     use chosen/stdout-path instead of console=
     remove useless earlyprintk
     same changes in bcm283x.dtsi
 v5: remove 1/4 dt-bindings and 4/4 hci_bcm serdev support
     1/4 and 4/4 merged in bluetooth-next tree

diff --git a/arch/arm/boot/dts/bcm283x.dtsi b/arch/arm/boot/dts/bcm283x.dtsi
index 431dcfc..013431e 100644
--- a/arch/arm/boot/dts/bcm283x.dtsi
+++ b/arch/arm/boot/dts/bcm283x.dtsi
@@ -20,8 +20,13 @@
 	#address-cells = <1>;
 	#size-cells = <1>;
 
+	aliases {
+		serial0 = &uart0;
+		serial1 = &uart1;
+	};
+
 	chosen {
-		bootargs = "earlyprintk console=ttyAMA0";
+		stdout-path = "serial0:115200n8";
 	};
 
 	thermal-zones {
-- 
1.9.1

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[PATCH v5 2/2] ARM: dts: bcm2837-rpi-3-b: Add bcm43438 serial slave

[Loic Poulain]

Add BCM43438 (bluetooth) as a slave device of uart0 (pl011/ttyAMA0).
This allows to automatically insert the bcm43438 to the bluetooth
subsystem instead of relying on userspace helpers (hciattach).

Overwrite chosen/stdout-path to use 8250 aux uart as console.

Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Signed-off-by: Loic Poulain <loic.poulain-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 arch/arm/boot/dts/bcm2837-rpi-3-b.dts | 10 ++++++++++
 1 file changed, 10 insertions(+)

 v2: dt-bindings as separate patch
     rebase on upcoming pi3 dts changes
 v3: changes in bcm serdev drivers:
     name refactoring and additional comments
     Add generic host_set_baudrate method
     Use agnostic device_property_read
 v4: changes in doc and dts:
     Add additional params to broadcom bt dt-bindings
     Set the max baudrate to 2000000 instead of 921600
     use chosen/stdout-path instead of console=
     remove useless earlyprintk
     same changes in bcm283x.dtsi
 v5: remove 1/4 dt-bindings and 4/4 hci_bcm serdev support
     1/4 and 4/4 merged in bluetooth-next tree

diff --git a/arch/arm/boot/dts/bcm2837-rpi-3-b.dts b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
index 20725ca..e4488cb 100644
--- a/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
+++ b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
@@ -8,6 +8,11 @@
 	compatible = "raspberrypi,3-model-b", "brcm,bcm2837";
 	model = "Raspberry Pi 3 Model B";
 
+	chosen {
+		/* 8250 auxiliar UART instead of pl011 */
+		stdout-path = "serial1:115200n8";
+	};
+
 	memory {
 		reg = <0 0x40000000>;
 	};
@@ -24,6 +29,11 @@
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_gpio32 &gpclk2_gpio43>;
 	status = "okay";
+
+	bluetooth {
+		compatible = "brcm,bcm43438-bt";
+		max-speed = <2000000>;
+	};
 };
 
 /* uart1 is mapped to the pin header */
-- 
1.9.1

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Re: [PATCH v5 2/2] ARM: dts: bcm2837-rpi-3-b: Add bcm43438 serial slave

[Marcel Holtmann]

Hi,

> Add BCM43438 (bluetooth) as a slave device of uart0 (pl011/ttyAMA0).
> This allows to automatically insert the bcm43438 to the bluetooth
> subsystem instead of relying on userspace helpers (hciattach).
> 
> Overwrite chosen/stdout-path to use 8250 aux uart as console.
> 
> Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
> Signed-off-by: Loic Poulain <loic.poulain-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> ---
> arch/arm/boot/dts/bcm2837-rpi-3-b.dts | 10 ++++++++++
> 1 file changed, 10 insertions(+)
> 
> v2: dt-bindings as separate patch
>     rebase on upcoming pi3 dts changes
> v3: changes in bcm serdev drivers:
>     name refactoring and additional comments
>     Add generic host_set_baudrate method
>     Use agnostic device_property_read
> v4: changes in doc and dts:
>     Add additional params to broadcom bt dt-bindings
>     Set the max baudrate to 2000000 instead of 921600
>     use chosen/stdout-path instead of console=
>     remove useless earlyprintk
>     same changes in bcm283x.dtsi
> v5: remove 1/4 dt-bindings and 4/4 hci_bcm serdev support
>     1/4 and 4/4 merged in bluetooth-next tree
> 
> diff --git a/arch/arm/boot/dts/bcm2837-rpi-3-b.dts b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
> index 20725ca..e4488cb 100644
> --- a/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
> +++ b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
> @@ -8,6 +8,11 @@
> 	compatible = "raspberrypi,3-model-b", "brcm,bcm2837";
> 	model = "Raspberry Pi 3 Model B";
> 
> +	chosen {
> +		/* 8250 auxiliar UART instead of pl011 */
> +		stdout-path = "serial1:115200n8";
> +	};
> +
> 	memory {
> 		reg = <0 0x40000000>;
> 	};
> @@ -24,6 +29,11 @@
> 	pinctrl-names = "default";
> 	pinctrl-0 = <&uart0_gpio32 &gpclk2_gpio43>;
> 	status = "okay";
> +
> +	bluetooth {
> +		compatible = "brcm,bcm43438-bt";
> +		max-speed = <2000000>;
> +	};
> };
> 

the driver for this is already in Linus’ tree. And I would really prefer that we get the DT changes merged in as well.

Regards

Marcel

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Re: [PATCH v5 2/2] ARM: dts: bcm2837-rpi-3-b: Add bcm43438 serial slave

[Eric Anholt]

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Marcel Holtmann <marcel-kz+m5ild9QBg9hUCZPvPmw@public.gmane.org> writes:

> Hi,
>
>> Add BCM43438 (bluetooth) as a slave device of uart0 (pl011/ttyAMA0).
>> This allows to automatically insert the bcm43438 to the bluetooth
>> subsystem instead of relying on userspace helpers (hciattach).
>> 
>> Overwrite chosen/stdout-path to use 8250 aux uart as console.
>> 
>> Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
>> Signed-off-by: Loic Poulain <loic.poulain-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
>> ---
>> arch/arm/boot/dts/bcm2837-rpi-3-b.dts | 10 ++++++++++
>> 1 file changed, 10 insertions(+)
>> 
>> v2: dt-bindings as separate patch
>>     rebase on upcoming pi3 dts changes
>> v3: changes in bcm serdev drivers:
>>     name refactoring and additional comments
>>     Add generic host_set_baudrate method
>>     Use agnostic device_property_read
>> v4: changes in doc and dts:
>>     Add additional params to broadcom bt dt-bindings
>>     Set the max baudrate to 2000000 instead of 921600
>>     use chosen/stdout-path instead of console=
>>     remove useless earlyprintk
>>     same changes in bcm283x.dtsi
>> v5: remove 1/4 dt-bindings and 4/4 hci_bcm serdev support
>>     1/4 and 4/4 merged in bluetooth-next tree
>> 
>> diff --git a/arch/arm/boot/dts/bcm2837-rpi-3-b.dts b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
>> index 20725ca..e4488cb 100644
>> --- a/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
>> +++ b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
>> @@ -8,6 +8,11 @@
>> 	compatible = "raspberrypi,3-model-b", "brcm,bcm2837";
>> 	model = "Raspberry Pi 3 Model B";
>> 
>> +	chosen {
>> +		/* 8250 auxiliar UART instead of pl011 */
>> +		stdout-path = "serial1:115200n8";
>> +	};
>> +
>> 	memory {
>> 		reg = <0 0x40000000>;
>> 	};
>> @@ -24,6 +29,11 @@
>> 	pinctrl-names = "default";
>> 	pinctrl-0 = <&uart0_gpio32 &gpclk2_gpio43>;
>> 	status = "okay";
>> +
>> +	bluetooth {
>> +		compatible = "brcm,bcm43438-bt";
>> +		max-speed = <2000000>;
>> +	};
>> };
>> 
>
> the driver for this is already in Linus’ tree. And I would really prefer that we get the DT changes merged in as well.

Now that the separated stdout patch is ready to go, I've applied this
for -next (dropping the chosen node) and I'm sending the PR for both.

Thanks so much for working on this!

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Re: [PATCH v5 1/2] ARM: dts: bcm283x: Use stdout-path instead of console bootarg

[Marcel Holtmann]

Hi,

> Add the serial port config to "chosen/stdout-path".
> Create serial0/1 aliases referring to uart0 ant uart1 paths.
> Remove unneeded earlyprintk.
> 
> Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
> Signed-off-by: Loic Poulain <loic.poulain-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> ---
> arch/arm/boot/dts/bcm283x.dtsi | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
> 
> v2: dt-bindings as separate patch
>     rebase on upcoming pi3 dts changes
> v3: changes in bcm serdev drivers:
>     name refactoring and additional comments
>     Add generic host_set_baudrate method
>     Use agnostic device_property_read
> v4: changes in doc and dts:
>     Add additional params to broadcom bt dt-bindings
>     Set the max baudrate to 2000000 instead of 921600
>     use chosen/stdout-path instead of console=
>     remove useless earlyprintk
>     same changes in bcm283x.dtsi
> v5: remove 1/4 dt-bindings and 4/4 hci_bcm serdev support
>     1/4 and 4/4 merged in bluetooth-next tree
> 
> diff --git a/arch/arm/boot/dts/bcm283x.dtsi b/arch/arm/boot/dts/bcm283x.dtsi
> index 431dcfc..013431e 100644
> --- a/arch/arm/boot/dts/bcm283x.dtsi
> +++ b/arch/arm/boot/dts/bcm283x.dtsi
> @@ -20,8 +20,13 @@
> 	#address-cells = <1>;
> 	#size-cells = <1>;
> 
> +	aliases {
> +		serial0 = &uart0;
> +		serial1 = &uart1;
> +	};
> +
> 	chosen {
> -		bootargs = "earlyprintk console=ttyAMA0";
> +		stdout-path = "serial0:115200n8";
> 	};

is anybody taking care of these two patches. I do not see them in Linus’ tree yet?

Regards

Marcel

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Re: [PATCH v5 1/2] ARM: dts: bcm283x: Use stdout-path instead of console bootarg

[Eric Anholt]

[-- Attachment #1: Type: text/plain, Size: 1869 bytes --]

Marcel Holtmann <marcel-kz+m5ild9QBg9hUCZPvPmw@public.gmane.org> writes:

> Hi,
>
>> Add the serial port config to "chosen/stdout-path".
>> Create serial0/1 aliases referring to uart0 ant uart1 paths.
>> Remove unneeded earlyprintk.
>> 
>> Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
>> Signed-off-by: Loic Poulain <loic.poulain-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
>> ---
>> arch/arm/boot/dts/bcm283x.dtsi | 7 ++++++-
>> 1 file changed, 6 insertions(+), 1 deletion(-)
>> 
>> v2: dt-bindings as separate patch
>>     rebase on upcoming pi3 dts changes
>> v3: changes in bcm serdev drivers:
>>     name refactoring and additional comments
>>     Add generic host_set_baudrate method
>>     Use agnostic device_property_read
>> v4: changes in doc and dts:
>>     Add additional params to broadcom bt dt-bindings
>>     Set the max baudrate to 2000000 instead of 921600
>>     use chosen/stdout-path instead of console=
>>     remove useless earlyprintk
>>     same changes in bcm283x.dtsi
>> v5: remove 1/4 dt-bindings and 4/4 hci_bcm serdev support
>>     1/4 and 4/4 merged in bluetooth-next tree
>> 
>> diff --git a/arch/arm/boot/dts/bcm283x.dtsi b/arch/arm/boot/dts/bcm283x.dtsi
>> index 431dcfc..013431e 100644
>> --- a/arch/arm/boot/dts/bcm283x.dtsi
>> +++ b/arch/arm/boot/dts/bcm283x.dtsi
>> @@ -20,8 +20,13 @@
>> 	#address-cells = <1>;
>> 	#size-cells = <1>;
>> 
>> +	aliases {
>> +		serial0 = &uart0;
>> +		serial1 = &uart1;
>> +	};
>> +
>> 	chosen {
>> -		bootargs = "earlyprintk console=ttyAMA0";
>> +		stdout-path = "serial0:115200n8";
>> 	};
>
> is anybody taking care of these two patches. I do not see them in Linus’ tree yet?

arm-soc process unfortunately doesn't accept PRs between rc5 or 6 and
the next rc1, so they're still in my TODO pile for when we get -rc1
again.

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Re: [PATCH v5 1/2] ARM: dts: bcm283x: Use stdout-path instead of console bootarg

[Marcel Holtmann]

Hi Eric,

>>> Add the serial port config to "chosen/stdout-path".
>>> Create serial0/1 aliases referring to uart0 ant uart1 paths.
>>> Remove unneeded earlyprintk.
>>> 
>>> Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
>>> Signed-off-by: Loic Poulain <loic.poulain-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
>>> ---
>>> arch/arm/boot/dts/bcm283x.dtsi | 7 ++++++-
>>> 1 file changed, 6 insertions(+), 1 deletion(-)
>>> 
>>> v2: dt-bindings as separate patch
>>>    rebase on upcoming pi3 dts changes
>>> v3: changes in bcm serdev drivers:
>>>    name refactoring and additional comments
>>>    Add generic host_set_baudrate method
>>>    Use agnostic device_property_read
>>> v4: changes in doc and dts:
>>>    Add additional params to broadcom bt dt-bindings
>>>    Set the max baudrate to 2000000 instead of 921600
>>>    use chosen/stdout-path instead of console=
>>>    remove useless earlyprintk
>>>    same changes in bcm283x.dtsi
>>> v5: remove 1/4 dt-bindings and 4/4 hci_bcm serdev support
>>>    1/4 and 4/4 merged in bluetooth-next tree
>>> 
>>> diff --git a/arch/arm/boot/dts/bcm283x.dtsi b/arch/arm/boot/dts/bcm283x.dtsi
>>> index 431dcfc..013431e 100644
>>> --- a/arch/arm/boot/dts/bcm283x.dtsi
>>> +++ b/arch/arm/boot/dts/bcm283x.dtsi
>>> @@ -20,8 +20,13 @@
>>> 	#address-cells = <1>;
>>> 	#size-cells = <1>;
>>> 
>>> +	aliases {
>>> +		serial0 = &uart0;
>>> +		serial1 = &uart1;
>>> +	};
>>> +
>>> 	chosen {
>>> -		bootargs = "earlyprintk console=ttyAMA0";
>>> +		stdout-path = "serial0:115200n8";
>>> 	};
>> 
>> is anybody taking care of these two patches. I do not see them in Linus’ tree yet?
> 
> arm-soc process unfortunately doesn't accept PRs between rc5 or 6 and
> the next rc1, so they're still in my TODO pile for when we get -rc1
> again.

the aliases change is actually fixing a real issue. The RPI 3 has the Bluetooth controller where the older models had the console. Leave the bluetooth { } section out of it, but at least fix the bootargs bug and use stdout-path with the correct aliases. Postponing real fixes like this until next -rc1 is a stupid process.

Regards

Marcel

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Re: [PATCH v5 1/2] ARM: dts: bcm283x: Use stdout-path instead of console bootarg

[Florian Fainelli]

On 09/08/2017 11:04 AM, Marcel Holtmann wrote:
> Hi Eric,
> 
>>>> Add the serial port config to "chosen/stdout-path".
>>>> Create serial0/1 aliases referring to uart0 ant uart1 paths.
>>>> Remove unneeded earlyprintk.
>>>>
>>>> Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
>>>> Signed-off-by: Loic Poulain <loic.poulain-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
>>>> ---
>>>> arch/arm/boot/dts/bcm283x.dtsi | 7 ++++++-
>>>> 1 file changed, 6 insertions(+), 1 deletion(-)
>>>>
>>>> v2: dt-bindings as separate patch
>>>>    rebase on upcoming pi3 dts changes
>>>> v3: changes in bcm serdev drivers:
>>>>    name refactoring and additional comments
>>>>    Add generic host_set_baudrate method
>>>>    Use agnostic device_property_read
>>>> v4: changes in doc and dts:
>>>>    Add additional params to broadcom bt dt-bindings
>>>>    Set the max baudrate to 2000000 instead of 921600
>>>>    use chosen/stdout-path instead of console=
>>>>    remove useless earlyprintk
>>>>    same changes in bcm283x.dtsi
>>>> v5: remove 1/4 dt-bindings and 4/4 hci_bcm serdev support
>>>>    1/4 and 4/4 merged in bluetooth-next tree
>>>>
>>>> diff --git a/arch/arm/boot/dts/bcm283x.dtsi b/arch/arm/boot/dts/bcm283x.dtsi
>>>> index 431dcfc..013431e 100644
>>>> --- a/arch/arm/boot/dts/bcm283x.dtsi
>>>> +++ b/arch/arm/boot/dts/bcm283x.dtsi
>>>> @@ -20,8 +20,13 @@
>>>> 	#address-cells = <1>;
>>>> 	#size-cells = <1>;
>>>>
>>>> +	aliases {
>>>> +		serial0 = &uart0;
>>>> +		serial1 = &uart1;
>>>> +	};
>>>> +
>>>> 	chosen {
>>>> -		bootargs = "earlyprintk console=ttyAMA0";
>>>> +		stdout-path = "serial0:115200n8";
>>>> 	};
>>>
>>> is anybody taking care of these two patches. I do not see them in Linus’ tree yet?
>>
>> arm-soc process unfortunately doesn't accept PRs between rc5 or 6 and
>> the next rc1, so they're still in my TODO pile for when we get -rc1
>> again.
> 
> the aliases change is actually fixing a real issue. The RPI 3 has the Bluetooth controller where the older models had the console. Leave the bluetooth { } section out of it, but at least fix the bootargs bug and use stdout-path with the correct aliases. Postponing real fixes like this until next -rc1 is a stupid process.

Since this is a real fix, what's the proper Fixes: tag for that so it
can also be backported to -stable trees?

Fixes can be submitted pretty much at any time, and having a Fixes: tag
helps everyone maintaining -stable trees to get that backported where
appropriate.

Thanks
-- 
Florian
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Re: [PATCH v5 1/2] ARM: dts: bcm283x: Use stdout-path instead of console bootarg

[Marcel Holtmann]

Hi Florian,

>>>>> Add the serial port config to "chosen/stdout-path".
>>>>> Create serial0/1 aliases referring to uart0 ant uart1 paths.
>>>>> Remove unneeded earlyprintk.
>>>>> 
>>>>> Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
>>>>> Signed-off-by: Loic Poulain <loic.poulain-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
>>>>> ---
>>>>> arch/arm/boot/dts/bcm283x.dtsi | 7 ++++++-
>>>>> 1 file changed, 6 insertions(+), 1 deletion(-)
>>>>> 
>>>>> v2: dt-bindings as separate patch
>>>>>   rebase on upcoming pi3 dts changes
>>>>> v3: changes in bcm serdev drivers:
>>>>>   name refactoring and additional comments
>>>>>   Add generic host_set_baudrate method
>>>>>   Use agnostic device_property_read
>>>>> v4: changes in doc and dts:
>>>>>   Add additional params to broadcom bt dt-bindings
>>>>>   Set the max baudrate to 2000000 instead of 921600
>>>>>   use chosen/stdout-path instead of console=
>>>>>   remove useless earlyprintk
>>>>>   same changes in bcm283x.dtsi
>>>>> v5: remove 1/4 dt-bindings and 4/4 hci_bcm serdev support
>>>>>   1/4 and 4/4 merged in bluetooth-next tree
>>>>> 
>>>>> diff --git a/arch/arm/boot/dts/bcm283x.dtsi b/arch/arm/boot/dts/bcm283x.dtsi
>>>>> index 431dcfc..013431e 100644
>>>>> --- a/arch/arm/boot/dts/bcm283x.dtsi
>>>>> +++ b/arch/arm/boot/dts/bcm283x.dtsi
>>>>> @@ -20,8 +20,13 @@
>>>>> 	#address-cells = <1>;
>>>>> 	#size-cells = <1>;
>>>>> 
>>>>> +	aliases {
>>>>> +		serial0 = &uart0;
>>>>> +		serial1 = &uart1;
>>>>> +	};
>>>>> +
>>>>> 	chosen {
>>>>> -		bootargs = "earlyprintk console=ttyAMA0";
>>>>> +		stdout-path = "serial0:115200n8";
>>>>> 	};
>>>> 
>>>> is anybody taking care of these two patches. I do not see them in Linus’ tree yet?
>>> 
>>> arm-soc process unfortunately doesn't accept PRs between rc5 or 6 and
>>> the next rc1, so they're still in my TODO pile for when we get -rc1
>>> again.
>> 
>> the aliases change is actually fixing a real issue. The RPI 3 has the Bluetooth controller where the older models had the console. Leave the bluetooth { } section out of it, but at least fix the bootargs bug and use stdout-path with the correct aliases. Postponing real fixes like this until next -rc1 is a stupid process.
> 
> Since this is a real fix, what's the proper Fixes: tag for that so it
> can also be backported to -stable trees?
> 
> Fixes can be submitted pretty much at any time, and having a Fixes: tag
> helps everyone maintaining -stable trees to get that backported where
> appropriate.

backporting will be hard since these patches depend on changes that will only be available in 4.14-rc1. I don’t really know how invasive the patch that introduces uart0 for RPI 3 is.

However I am pretty sure that Loic can combine these two patches (and leaving the bluetooth { } section out) and send it with a proper annotation as fix.

Regards

Marcel

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