[PATCH v3 0/2] Allwinner XR819 SDIO Wi-Fi DT binding and OPi Zero XR819 IRQ

[PATCH v3 0/2] Allwinner XR819 SDIO Wi-Fi DT binding and OPi Zero XR819 IRQ

[Icenowy Zheng]

The Allwinner XR819 SDIO Wi-Fi chip supports an out-of-band interrupt line,
and the in-band interrupt is also supported.

However the current out-of-tree driver uses the out-of-band interrupt by
default.

This patchset adds the device tree binding for the chip as well as the
out-of-band interrupt, then adds the interrupt to the device tree of
Orange Pi Zero.

Icenowy Zheng (1):
  dt-bindings: add device tree binding for Allwinner XR819 SDIO Wi-Fi

Sergey Matyukevich (1):
  ARM: sun8i: h2+: specify wifi interrupts for Orange Pi Zero

 .../bindings/net/wireless/allwinner,xr819.txt      | 38 ++++++++++++++++++++++
 arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts  |  3 ++
 2 files changed, 41 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/wireless/allwinner,xr819.txt

-- 
2.13.5

[PATCH v3 1/2] dt-bindings: add device tree binding for Allwinner XR819 SDIO Wi-Fi

[Icenowy Zheng]

Allwinner XR819 is a SDIO Wi-Fi chip, which has the functionality to use
an out-of-band interrupt pin instead of SDIO in-band interrupt.

Add the device tree binding of this chip, in order to make it possible
to add this interrupt pin to device trees.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Acked-by: Rob Herring <robh@kernel.org>
---
Changes in v3:
- Renames the node name.
- Adds ACK from Rob.
Changes in v2:
- Removed status property in example.
- Added required property reg.

 .../bindings/net/wireless/allwinner,xr819.txt      | 38 ++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/wireless/allwinner,xr819.txt

diff --git a/Documentation/devicetree/bindings/net/wireless/allwinner,xr819.txt b/Documentation/devicetree/bindings/net/wireless/allwinner,xr819.txt
new file mode 100644
index 000000000000..7ae40441e343
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/wireless/allwinner,xr819.txt
@@ -0,0 +1,38 @@
+Allwinner XRadio wireless SDIO devices
+
+This node provides properties for controlling the XRadio wireless device. The
+node is expected to be specified as a child node to the SDIO controller that
+connects the device to the system.
+
+Required properties:
+
+ - reg : The SDIO function number, see "Use of function subnodes" in
+	../../mmc/mmc.txt.
+ - compatible : Should be "allwinner,xr819".
+
+Optional properties:
+ - interrupt-parent : the phandle for the interrupt controller to which the
+	device interrupts are connected.
+ - interrupts : specifies attributes for the out-of-band interrupt (host-wake).
+	When not specified the device will use in-band SDIO interrupts.
+
+Example:
+
+mmc1: mmc at 01c10000 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc1_pins_a>;
+	vmmc-supply = <&reg_vcc_wifi>;
+	mmc-pwrseq = <&wifi_pwrseq>;
+	bus-width = <4>;
+	non-removable;
+
+	xr819: wifi at 1 {
+		reg = <1>;
+		compatible = "allwinner,xr819";
+		interrupt-parent = <&pio>;
+		interrupts = <6 10 IRQ_TYPE_EDGE_RISING>;
+	};
+};
-- 
2.13.5

[PATCH v3 1/2] dt-bindings: add device tree binding for Allwinner XR819 SDIO Wi-Fi

[Kalle Valo]

Icenowy Zheng <icenowy@aosc.io> writes:

> Allwinner XR819 is a SDIO Wi-Fi chip, which has the functionality to use
> an out-of-band interrupt pin instead of SDIO in-band interrupt.
>
> Add the device tree binding of this chip, in order to make it possible
> to add this interrupt pin to device trees.
>
> Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
> Acked-by: Rob Herring <robh@kernel.org>
> ---
> Changes in v3:
> - Renames the node name.
> - Adds ACK from Rob.
> Changes in v2:
> - Removed status property in example.
> - Added required property reg.
>
>  .../bindings/net/wireless/allwinner,xr819.txt      | 38 ++++++++++++++++++++++
>  1 file changed, 38 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/wireless/allwinner,xr819.txt

Like I asked already last time, AFAICS there is no upstream xr819
wireless driver in drivers/net/wireless directory. Do we still accept
bindings like this for out-of-tree drivers?

-- 
Kalle Valo

[PATCH v3 1/2] dt-bindings: add device tree binding for Allwinner XR819 SDIO Wi-Fi

[Icenowy Zheng]

? 2017?10?4? GMT+08:00 ??5:02:17, Kalle Valo <kvalo@codeaurora.org> ??:
>Icenowy Zheng <icenowy@aosc.io> writes:
>
>> Allwinner XR819 is a SDIO Wi-Fi chip, which has the functionality to
>use
>> an out-of-band interrupt pin instead of SDIO in-band interrupt.
>>
>> Add the device tree binding of this chip, in order to make it
>possible
>> to add this interrupt pin to device trees.
>>
>> Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
>> Acked-by: Rob Herring <robh@kernel.org>
>> ---
>> Changes in v3:
>> - Renames the node name.
>> - Adds ACK from Rob.
>> Changes in v2:
>> - Removed status property in example.
>> - Added required property reg.
>>
>>  .../bindings/net/wireless/allwinner,xr819.txt      | 38
>++++++++++++++++++++++
>>  1 file changed, 38 insertions(+)
>>  create mode 100644
>Documentation/devicetree/bindings/net/wireless/allwinner,xr819.txt
>
>Like I asked already last time, AFAICS there is no upstream xr819
>wireless driver in drivers/net/wireless directory. Do we still accept
>bindings like this for out-of-tree drivers?

See esp8089.

There's also no in-tree driver for it.

[PATCH v3 1/2] dt-bindings: add device tree binding for Allwinner XR819 SDIO Wi-Fi

[Arend van Spriel]

On 10/4/2017 11:03 AM, Icenowy Zheng wrote:
>
>
> ? 2017?10?4? GMT+08:00 ??5:02:17, Kalle Valo <kvalo@codeaurora.org> ??:
>> Icenowy Zheng <icenowy@aosc.io> writes:
>>
>>> Allwinner XR819 is a SDIO Wi-Fi chip, which has the functionality to
>> use
>>> an out-of-band interrupt pin instead of SDIO in-band interrupt.
>>>
>>> Add the device tree binding of this chip, in order to make it
>> possible
>>> to add this interrupt pin to device trees.
>>>
>>> Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
>>> Acked-by: Rob Herring <robh@kernel.org>
>>> ---
>>> Changes in v3:
>>> - Renames the node name.
>>> - Adds ACK from Rob.
>>> Changes in v2:
>>> - Removed status property in example.
>>> - Added required property reg.
>>>
>>>   .../bindings/net/wireless/allwinner,xr819.txt      | 38
>> ++++++++++++++++++++++
>>>   1 file changed, 38 insertions(+)
>>>   create mode 100644
>> Documentation/devicetree/bindings/net/wireless/allwinner,xr819.txt
>>
>> Like I asked already last time, AFAICS there is no upstream xr819
>> wireless driver in drivers/net/wireless directory. Do we still accept
>> bindings like this for out-of-tree drivers?
>
> See esp8089.
>
> There's also no in-tree driver for it.

The question is whether we should. The above might be a precedent, but 
it may not necessarily be the way to go. The commit message for esp8089 
seems to hint that there is intent to have an in-tree driver:

"""
     Note that at this point there only is an out of tree driver for this
     hardware, there is no clear timeline / path for merging this. Still
     I believe it would be good to specify the binding for this in tree
     now, so that any future migration to an in tree driver will not cause
     compatiblity issues.

     Cc: Icenowy Zheng <icenowy@aosc.xyz>
     Signed-off-by: Hans de Goede <hdegoede@redhat.com>
     Signed-off-by: Rob Herring <robh@kernel.org>
"""

Regardless the bindings are in principle independent of the kernel and 
just describing hardware. I think there have been discussions to move 
the bindings to their own repository, but apparently it was decided 
otherwise.

Regards,
Arend

[PATCH v3 1/2] dt-bindings: add device tree binding for Allwinner XR819 SDIO Wi-Fi

[Maxime Ripard]

On Wed, Oct 04, 2017 at 10:02:48AM +0000, Arend van Spriel wrote:
> On 10/4/2017 11:03 AM, Icenowy Zheng wrote:
> > 
> > 
> > ? 2017?10?4? GMT+08:00 ??5:02:17, Kalle Valo <kvalo@codeaurora.org> ??:
> > > Icenowy Zheng <icenowy@aosc.io> writes:
> > > 
> > > > Allwinner XR819 is a SDIO Wi-Fi chip, which has the functionality to
> > > use
> > > > an out-of-band interrupt pin instead of SDIO in-band interrupt.
> > > > 
> > > > Add the device tree binding of this chip, in order to make it
> > > possible
> > > > to add this interrupt pin to device trees.
> > > > 
> > > > Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
> > > > Acked-by: Rob Herring <robh@kernel.org>
> > > > ---
> > > > Changes in v3:
> > > > - Renames the node name.
> > > > - Adds ACK from Rob.
> > > > Changes in v2:
> > > > - Removed status property in example.
> > > > - Added required property reg.
> > > > 
> > > >   .../bindings/net/wireless/allwinner,xr819.txt      | 38
> > > ++++++++++++++++++++++
> > > >   1 file changed, 38 insertions(+)
> > > >   create mode 100644
> > > Documentation/devicetree/bindings/net/wireless/allwinner,xr819.txt
> > > 
> > > Like I asked already last time, AFAICS there is no upstream xr819
> > > wireless driver in drivers/net/wireless directory. Do we still accept
> > > bindings like this for out-of-tree drivers?
> > 
> > See esp8089.
> > 
> > There's also no in-tree driver for it.
> 
> The question is whether we should. The above might be a precedent, but it
> may not necessarily be the way to go. The commit message for esp8089 seems
> to hint that there is intent to have an in-tree driver:
> 
> """
>     Note that at this point there only is an out of tree driver for this
>     hardware, there is no clear timeline / path for merging this. Still
>     I believe it would be good to specify the binding for this in tree
>     now, so that any future migration to an in tree driver will not cause
>     compatiblity issues.
> 
>     Cc: Icenowy Zheng <icenowy@aosc.xyz>
>     Signed-off-by: Hans de Goede <hdegoede@redhat.com>
>     Signed-off-by: Rob Herring <robh@kernel.org>
> """
> 
> Regardless the bindings are in principle independent of the kernel and just
> describing hardware. I think there have been discussions to move the
> bindings to their own repository, but apparently it was decided otherwise.

Yeah, I guess especially how it could be merged with the cw1200 driver
would be very relevant to that commit log.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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[PATCH v3 1/2] dt-bindings: add device tree binding for Allwinner XR819 SDIO Wi-Fi

[Icenowy Zheng]

? 2017?10?4? GMT+08:00 ??6:11:45, Maxime Ripard <maxime.ripard@free-electrons.com> ??:
>On Wed, Oct 04, 2017 at 10:02:48AM +0000, Arend van Spriel wrote:
>> On 10/4/2017 11:03 AM, Icenowy Zheng wrote:
>> > 
>> > 
>> > ? 2017?10?4? GMT+08:00 ??5:02:17, Kalle Valo <kvalo@codeaurora.org>
>??:
>> > > Icenowy Zheng <icenowy@aosc.io> writes:
>> > > 
>> > > > Allwinner XR819 is a SDIO Wi-Fi chip, which has the
>functionality to
>> > > use
>> > > > an out-of-band interrupt pin instead of SDIO in-band interrupt.
>> > > > 
>> > > > Add the device tree binding of this chip, in order to make it
>> > > possible
>> > > > to add this interrupt pin to device trees.
>> > > > 
>> > > > Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
>> > > > Acked-by: Rob Herring <robh@kernel.org>
>> > > > ---
>> > > > Changes in v3:
>> > > > - Renames the node name.
>> > > > - Adds ACK from Rob.
>> > > > Changes in v2:
>> > > > - Removed status property in example.
>> > > > - Added required property reg.
>> > > > 
>> > > >   .../bindings/net/wireless/allwinner,xr819.txt      | 38
>> > > ++++++++++++++++++++++
>> > > >   1 file changed, 38 insertions(+)
>> > > >   create mode 100644
>> > >
>Documentation/devicetree/bindings/net/wireless/allwinner,xr819.txt
>> > > 
>> > > Like I asked already last time, AFAICS there is no upstream xr819
>> > > wireless driver in drivers/net/wireless directory. Do we still
>accept
>> > > bindings like this for out-of-tree drivers?
>> > 
>> > See esp8089.
>> > 
>> > There's also no in-tree driver for it.
>> 
>> The question is whether we should. The above might be a precedent,
>but it
>> may not necessarily be the way to go. The commit message for esp8089
>seems
>> to hint that there is intent to have an in-tree driver:
>> 
>> """
>>     Note that at this point there only is an out of tree driver for
>this
>>     hardware, there is no clear timeline / path for merging this.
>Still
>>     I believe it would be good to specify the binding for this in
>tree
>>     now, so that any future migration to an in tree driver will not
>cause
>>     compatiblity issues.
>> 
>>     Cc: Icenowy Zheng <icenowy@aosc.xyz>
>>     Signed-off-by: Hans de Goede <hdegoede@redhat.com>
>>     Signed-off-by: Rob Herring <robh@kernel.org>
>> """
>> 
>> Regardless the bindings are in principle independent of the kernel
>and just
>> describing hardware. I think there have been discussions to move the
>> bindings to their own repository, but apparently it was decided
>otherwise.
>
>Yeah, I guess especially how it could be merged with the cw1200 driver
>would be very relevant to that commit log.

The cw1200 driver seems to still have some legacy platform
data. Maybe they should also be convert to DT.
(Or maybe compatible = "allwinner,xr819" is enough, as
xr819 is a specified variant of cw1200 family)

>
>Maxime

[PATCH v3 1/2] dt-bindings: add device tree binding for Allwinner XR819 SDIO Wi-Fi

[Kalle Valo]

Icenowy Zheng <icenowy@aosc.io> writes:

> ? 2017?10?4? GMT+08:00 ??6:11:45, Maxime Ripard
> <maxime.ripard@free-electrons.com> ??:
>>On Wed, Oct 04, 2017 at 10:02:48AM +0000, Arend van Spriel wrote:
>>> On 10/4/2017 11:03 AM, Icenowy Zheng wrote:
>>> > 
>>> > 
>>> > ? 2017?10?4? GMT+08:00 ??5:02:17, Kalle Valo <kvalo@codeaurora.org>
>>??:
>>> > > Icenowy Zheng <icenowy@aosc.io> writes:
>>> > > 
>>> > > > Allwinner XR819 is a SDIO Wi-Fi chip, which has the
>>functionality to
>>> > > use
>>> > > > an out-of-band interrupt pin instead of SDIO in-band interrupt.
>>> > > > 
>>> > > > Add the device tree binding of this chip, in order to make it
>>> > > possible
>>> > > > to add this interrupt pin to device trees.
>>> > > > 
>>> > > > Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
>>> > > > Acked-by: Rob Herring <robh@kernel.org>
>>> > > > ---
>>> > > > Changes in v3:
>>> > > > - Renames the node name.
>>> > > > - Adds ACK from Rob.
>>> > > > Changes in v2:
>>> > > > - Removed status property in example.
>>> > > > - Added required property reg.
>>> > > > 
>>> > > >   .../bindings/net/wireless/allwinner,xr819.txt      | 38
>>> > > ++++++++++++++++++++++
>>> > > >   1 file changed, 38 insertions(+)
>>> > > >   create mode 100644
>>> > >
>>Documentation/devicetree/bindings/net/wireless/allwinner,xr819.txt
>>> > > 
>>> > > Like I asked already last time, AFAICS there is no upstream xr819
>>> > > wireless driver in drivers/net/wireless directory. Do we still
>>accept
>>> > > bindings like this for out-of-tree drivers?
>>> > 
>>> > See esp8089.
>>> > 
>>> > There's also no in-tree driver for it.
>>> 
>>> The question is whether we should. The above might be a precedent,
>>but it
>>> may not necessarily be the way to go. The commit message for esp8089
>>seems
>>> to hint that there is intent to have an in-tree driver:
>>> 
>>> """
>>>     Note that at this point there only is an out of tree driver for
>>this
>>>     hardware, there is no clear timeline / path for merging this.
>>Still
>>>     I believe it would be good to specify the binding for this in
>>tree
>>>     now, so that any future migration to an in tree driver will not
>>cause
>>>     compatiblity issues.
>>> 
>>>     Cc: Icenowy Zheng <icenowy@aosc.xyz>
>>>     Signed-off-by: Hans de Goede <hdegoede@redhat.com>
>>>     Signed-off-by: Rob Herring <robh@kernel.org>
>>> """
>>> 
>>> Regardless the bindings are in principle independent of the kernel
>>and just
>>> describing hardware. I think there have been discussions to move the
>>> bindings to their own repository, but apparently it was decided
>>otherwise.
>>
>>Yeah, I guess especially how it could be merged with the cw1200 driver
>>would be very relevant to that commit log.
>
> The cw1200 driver seems to still have some legacy platform
> data. Maybe they should also be convert to DT.
> (Or maybe compatible = "allwinner,xr819" is enough, as
> xr819 is a specified variant of cw1200 family)

Ah, so the upstream cw1200 driver supports xr819? Has anyone tested
that? Or does cw1200 more changes than just adding the DT support?

-- 
Kalle Valo

[PATCH v3 1/2] dt-bindings: add device tree binding for Allwinner XR819 SDIO Wi-Fi

[Icenowy Zheng]

? 2017?10?5? GMT+08:00 ??2:58:01, Kalle Valo <kvalo@codeaurora.org> ??:
>Icenowy Zheng <icenowy@aosc.io> writes:
>
>> ? 2017?10?4? GMT+08:00 ??6:11:45, Maxime Ripard
>> <maxime.ripard@free-electrons.com> ??:
>>>On Wed, Oct 04, 2017 at 10:02:48AM +0000, Arend van Spriel wrote:
>>>> On 10/4/2017 11:03 AM, Icenowy Zheng wrote:
>>>> > 
>>>> > 
>>>> > ? 2017?10?4? GMT+08:00 ??5:02:17, Kalle Valo
><kvalo@codeaurora.org>
>>>??:
>>>> > > Icenowy Zheng <icenowy@aosc.io> writes:
>>>> > > 
>>>> > > > Allwinner XR819 is a SDIO Wi-Fi chip, which has the
>>>functionality to
>>>> > > use
>>>> > > > an out-of-band interrupt pin instead of SDIO in-band
>interrupt.
>>>> > > > 
>>>> > > > Add the device tree binding of this chip, in order to make it
>>>> > > possible
>>>> > > > to add this interrupt pin to device trees.
>>>> > > > 
>>>> > > > Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
>>>> > > > Acked-by: Rob Herring <robh@kernel.org>
>>>> > > > ---
>>>> > > > Changes in v3:
>>>> > > > - Renames the node name.
>>>> > > > - Adds ACK from Rob.
>>>> > > > Changes in v2:
>>>> > > > - Removed status property in example.
>>>> > > > - Added required property reg.
>>>> > > > 
>>>> > > >   .../bindings/net/wireless/allwinner,xr819.txt      | 38
>>>> > > ++++++++++++++++++++++
>>>> > > >   1 file changed, 38 insertions(+)
>>>> > > >   create mode 100644
>>>> > >
>>>Documentation/devicetree/bindings/net/wireless/allwinner,xr819.txt
>>>> > > 
>>>> > > Like I asked already last time, AFAICS there is no upstream
>xr819
>>>> > > wireless driver in drivers/net/wireless directory. Do we still
>>>accept
>>>> > > bindings like this for out-of-tree drivers?
>>>> > 
>>>> > See esp8089.
>>>> > 
>>>> > There's also no in-tree driver for it.
>>>> 
>>>> The question is whether we should. The above might be a precedent,
>>>but it
>>>> may not necessarily be the way to go. The commit message for
>esp8089
>>>seems
>>>> to hint that there is intent to have an in-tree driver:
>>>> 
>>>> """
>>>>     Note that at this point there only is an out of tree driver for
>>>this
>>>>     hardware, there is no clear timeline / path for merging this.
>>>Still
>>>>     I believe it would be good to specify the binding for this in
>>>tree
>>>>     now, so that any future migration to an in tree driver will not
>>>cause
>>>>     compatiblity issues.
>>>> 
>>>>     Cc: Icenowy Zheng <icenowy@aosc.xyz>
>>>>     Signed-off-by: Hans de Goede <hdegoede@redhat.com>
>>>>     Signed-off-by: Rob Herring <robh@kernel.org>
>>>> """
>>>> 
>>>> Regardless the bindings are in principle independent of the kernel
>>>and just
>>>> describing hardware. I think there have been discussions to move
>the
>>>> bindings to their own repository, but apparently it was decided
>>>otherwise.
>>>
>>>Yeah, I guess especially how it could be merged with the cw1200
>driver
>>>would be very relevant to that commit log.
>>
>> The cw1200 driver seems to still have some legacy platform
>> data. Maybe they should also be convert to DT.
>> (Or maybe compatible = "allwinner,xr819" is enough, as
>> xr819 is a specified variant of cw1200 family)
>
>Ah, so the upstream cw1200 driver supports xr819? Has anyone tested
>that? Or does cw1200 more changes than just adding the DT support?

I think the cw1200 driver currently lacks maintain, and
the product is already discontinued by ST-E.

>
>-- 
>Kalle Valo
>
>_______________________________________________
>linux-arm-kernel mailing list
>linux-arm-kernel at lists.infradead.org
>http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v3 1/2] dt-bindings: add device tree binding for Allwinner XR819 SDIO Wi-Fi

[icenowy at aosc.io]

? 2017-10-05 14:58?Kalle Valo ???
> Icenowy Zheng <icenowy@aosc.io> writes:
> 
>> ? 2017?10?4? GMT+08:00 ??6:11:45, Maxime Ripard
>> <maxime.ripard@free-electrons.com> ??:
>>> On Wed, Oct 04, 2017 at 10:02:48AM +0000, Arend van Spriel wrote:
>>>> On 10/4/2017 11:03 AM, Icenowy Zheng wrote:
>>>> >
>>>> >
>>>> > ? 2017?10?4? GMT+08:00 ??5:02:17, Kalle Valo <kvalo@codeaurora.org>
>>> ??:
>>>> > > Icenowy Zheng <icenowy@aosc.io> writes:
>>>> > >
>>>> > > > Allwinner XR819 is a SDIO Wi-Fi chip, which has the
>>> functionality to
>>>> > > use
>>>> > > > an out-of-band interrupt pin instead of SDIO in-band interrupt.
>>>> > > >
>>>> > > > Add the device tree binding of this chip, in order to make it
>>>> > > possible
>>>> > > > to add this interrupt pin to device trees.
>>>> > > >
>>>> > > > Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
>>>> > > > Acked-by: Rob Herring <robh@kernel.org>
>>>> > > > ---
>>>> > > > Changes in v3:
>>>> > > > - Renames the node name.
>>>> > > > - Adds ACK from Rob.
>>>> > > > Changes in v2:
>>>> > > > - Removed status property in example.
>>>> > > > - Added required property reg.
>>>> > > >
>>>> > > >   .../bindings/net/wireless/allwinner,xr819.txt      | 38
>>>> > > ++++++++++++++++++++++
>>>> > > >   1 file changed, 38 insertions(+)
>>>> > > >   create mode 100644
>>>> > >
>>> Documentation/devicetree/bindings/net/wireless/allwinner,xr819.txt
>>>> > >
>>>> > > Like I asked already last time, AFAICS there is no upstream xr819
>>>> > > wireless driver in drivers/net/wireless directory. Do we still
>>> accept
>>>> > > bindings like this for out-of-tree drivers?
>>>> >
>>>> > See esp8089.
>>>> >
>>>> > There's also no in-tree driver for it.
>>>> 
>>>> The question is whether we should. The above might be a precedent,
>>> but it
>>>> may not necessarily be the way to go. The commit message for esp8089
>>> seems
>>>> to hint that there is intent to have an in-tree driver:
>>>> 
>>>> """
>>>>     Note that at this point there only is an out of tree driver for
>>> this
>>>>     hardware, there is no clear timeline / path for merging this.
>>> Still
>>>>     I believe it would be good to specify the binding for this in
>>> tree
>>>>     now, so that any future migration to an in tree driver will not
>>> cause
>>>>     compatiblity issues.
>>>> 
>>>>     Cc: Icenowy Zheng <icenowy@aosc.xyz>
>>>>     Signed-off-by: Hans de Goede <hdegoede@redhat.com>
>>>>     Signed-off-by: Rob Herring <robh@kernel.org>
>>>> """
>>>> 
>>>> Regardless the bindings are in principle independent of the kernel
>>> and just
>>>> describing hardware. I think there have been discussions to move the
>>>> bindings to their own repository, but apparently it was decided
>>> otherwise.
>>> 
>>> Yeah, I guess especially how it could be merged with the cw1200 
>>> driver
>>> would be very relevant to that commit log.
>> 
>> The cw1200 driver seems to still have some legacy platform
>> data. Maybe they should also be convert to DT.
>> (Or maybe compatible = "allwinner,xr819" is enough, as
>> xr819 is a specified variant of cw1200 family)
> 
> Ah, so the upstream cw1200 driver supports xr819? Has anyone tested
> that? Or does cw1200 more changes than just adding the DT support?

By doing some tests, XR819 is in the the CW1x60 family, which is not
yet well supported by cw1200 driver.

More work should be needed for support xr819 in cw1200 driver.

[PATCH v3 1/2] dt-bindings: add device tree binding for Allwinner XR819 SDIO Wi-Fi

[icenowy at aosc.io]

? 2017-10-05 14:58?Kalle Valo ???
> Icenowy Zheng <icenowy@aosc.io> writes:
> 
>> ? 2017?10?4? GMT+08:00 ??6:11:45, Maxime Ripard
>> <maxime.ripard@free-electrons.com> ??:
>>> On Wed, Oct 04, 2017 at 10:02:48AM +0000, Arend van Spriel wrote:
>>>> On 10/4/2017 11:03 AM, Icenowy Zheng wrote:
>>>> >
>>>> >
>>>> > ? 2017?10?4? GMT+08:00 ??5:02:17, Kalle Valo <kvalo@codeaurora.org>
>>> ??:
>>>> > > Icenowy Zheng <icenowy@aosc.io> writes:
>>>> > >
>>>> > > > Allwinner XR819 is a SDIO Wi-Fi chip, which has the
>>> functionality to
>>>> > > use
>>>> > > > an out-of-band interrupt pin instead of SDIO in-band interrupt.
>>>> > > >
>>>> > > > Add the device tree binding of this chip, in order to make it
>>>> > > possible
>>>> > > > to add this interrupt pin to device trees.
>>>> > > >
>>>> > > > Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
>>>> > > > Acked-by: Rob Herring <robh@kernel.org>
>>>> > > > ---
>>>> > > > Changes in v3:
>>>> > > > - Renames the node name.
>>>> > > > - Adds ACK from Rob.
>>>> > > > Changes in v2:
>>>> > > > - Removed status property in example.
>>>> > > > - Added required property reg.
>>>> > > >
>>>> > > >   .../bindings/net/wireless/allwinner,xr819.txt      | 38
>>>> > > ++++++++++++++++++++++
>>>> > > >   1 file changed, 38 insertions(+)
>>>> > > >   create mode 100644
>>>> > >
>>> Documentation/devicetree/bindings/net/wireless/allwinner,xr819.txt
>>>> > >
>>>> > > Like I asked already last time, AFAICS there is no upstream xr819
>>>> > > wireless driver in drivers/net/wireless directory. Do we still
>>> accept
>>>> > > bindings like this for out-of-tree drivers?
>>>> >
>>>> > See esp8089.
>>>> >
>>>> > There's also no in-tree driver for it.
>>>> 
>>>> The question is whether we should. The above might be a precedent,
>>> but it
>>>> may not necessarily be the way to go. The commit message for esp8089
>>> seems
>>>> to hint that there is intent to have an in-tree driver:
>>>> 
>>>> """
>>>>     Note that at this point there only is an out of tree driver for
>>> this
>>>>     hardware, there is no clear timeline / path for merging this.
>>> Still
>>>>     I believe it would be good to specify the binding for this in
>>> tree
>>>>     now, so that any future migration to an in tree driver will not
>>> cause
>>>>     compatiblity issues.
>>>> 
>>>>     Cc: Icenowy Zheng <icenowy@aosc.xyz>
>>>>     Signed-off-by: Hans de Goede <hdegoede@redhat.com>
>>>>     Signed-off-by: Rob Herring <robh@kernel.org>
>>>> """
>>>> 
>>>> Regardless the bindings are in principle independent of the kernel
>>> and just
>>>> describing hardware. I think there have been discussions to move the
>>>> bindings to their own repository, but apparently it was decided
>>> otherwise.
>>> 
>>> Yeah, I guess especially how it could be merged with the cw1200 
>>> driver
>>> would be very relevant to that commit log.
>> 
>> The cw1200 driver seems to still have some legacy platform
>> data. Maybe they should also be convert to DT.
>> (Or maybe compatible = "allwinner,xr819" is enough, as
>> xr819 is a specified variant of cw1200 family)
> 
> Ah, so the upstream cw1200 driver supports xr819? Has anyone tested
> that? Or does cw1200 more changes than just adding the DT support?

The support of XR819 in CW1200 driver is far more difficult than I
imagined -- the codedrop used in the mainlined CW1200 driver seems to
be so old that it's before XR819 (which seems to be based on CW1160),
and there's a large number of problems to adapt it to a modern CW1200
variant.

P.S. could you apply this device tree binding patch now?

[PATCH v3 1/2] dt-bindings: add device tree binding for Allwinner XR819 SDIO Wi-Fi

[Kalle Valo]

icenowy at aosc.io writes:

>>>>> > > Like I asked already last time, AFAICS there is no upstream xr819
>>>>> > > wireless driver in drivers/net/wireless directory. Do we still
>>>> accept
>>>>> > > bindings like this for out-of-tree drivers?
>>>>> >
>>>>> > See esp8089.
>>>>> >
>>>>> > There's also no in-tree driver for it.
>>>>>
>>>>> The question is whether we should. The above might be a precedent,
>>>> but it
>>>>> may not necessarily be the way to go. The commit message for esp8089
>>>> seems
>>>>> to hint that there is intent to have an in-tree driver:
>>>>>
>>>>> """
>>>>>     Note that at this point there only is an out of tree driver for
>>>> this
>>>>>     hardware, there is no clear timeline / path for merging this.
>>>> Still
>>>>>     I believe it would be good to specify the binding for this in
>>>> tree
>>>>>     now, so that any future migration to an in tree driver will not
>>>> cause
>>>>>     compatiblity issues.
>>>>>
>>>>>     Cc: Icenowy Zheng <icenowy@aosc.xyz>
>>>>>     Signed-off-by: Hans de Goede <hdegoede@redhat.com>
>>>>>     Signed-off-by: Rob Herring <robh@kernel.org>
>>>>> """
>>>>>
>>>>> Regardless the bindings are in principle independent of the kernel
>>>> and just
>>>>> describing hardware. I think there have been discussions to move the
>>>>> bindings to their own repository, but apparently it was decided
>>>> otherwise.
>>>>
>>>> Yeah, I guess especially how it could be merged with the cw1200
>>>> driver
>>>> would be very relevant to that commit log.
>>>
>>> The cw1200 driver seems to still have some legacy platform
>>> data. Maybe they should also be convert to DT.
>>> (Or maybe compatible = "allwinner,xr819" is enough, as
>>> xr819 is a specified variant of cw1200 family)
>>
>> Ah, so the upstream cw1200 driver supports xr819? Has anyone tested
>> that? Or does cw1200 more changes than just adding the DT support?
>
> The support of XR819 in CW1200 driver is far more difficult than I
> imagined -- the codedrop used in the mainlined CW1200 driver seems to
> be so old that it's before XR819 (which seems to be based on CW1160),
> and there's a large number of problems to adapt it to a modern CW1200
> variant.
>
> P.S. could you apply this device tree binding patch now?

As I haven't seen any consensus that applying bindings document for
out-of-tree drivers is ok so at least I'm not taking this. Though not
sure what DT maintainers are planning to do.

-- 
Kalle Valo

[PATCH v3 2/2] ARM: sun8i: h2+: specify wifi interrupts for Orange Pi Zero

[Icenowy Zheng]

From: Sergey Matyukevich <geomatsi@gmail.com>

The Orange Pi Zero board has Allwinner XR819 SDIO wifi chip. The board
dts file provides a node enabling mmc1 controller, and a out-of-band
interrupt line of the chip is also connected, although the chip also
supports in-band interrupt.

The current out-of-tree driver is hardcoded to use out-of-band interrupt
as default, and it needs to be modified to use the in-band interrupt.

This commit adds the out-of-band interrupt line into the device tree.

Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
[Icenowy: Changed vendor prefix to allwinner and modify commit message]
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
---
Changes in v3 by Icenowy:
- Change the compatible string vendor prefix to "allwinner".
- Modify the commit message.
Changes in v2 by Sergey:
- Adds the compatible string.

 arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts b/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts
index b1502df7b509..6595617204b3 100644
--- a/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts
+++ b/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts
@@ -127,6 +127,9 @@
 	 */
 	xr819: sdio_wifi at 1 {
 		reg = <1>;
+		compatible = "allwinner,xr819";
+		interrupt-parent = <&pio>;
+		interrupts = <6 10 IRQ_TYPE_EDGE_RISING>;
 	};
 };
 
-- 
2.13.5