Colorly e708q1 and AXP20x support

Colorly e708q1 and AXP20x support

[Horváth Csaba]

Hi,

I'm building a wireless display on a Colorfly e708q1 tablet. This is
an A31s device, supported by Linux-Sunxi.
I have managed to install Arch and get Wifi with an 5.x (stock)
kernel, because with newer kernels compiled according to the guide at
https://linux-sunxi.org/Colorfly_e708q1 i had no display.  Debian also
works, but the device overheats, or freezes because of other cause.

With this kernel, the only problem is that the AXP20x power controller
is not working, therefore the device is very hot. I could not find any
information about how to get the AXP working. Basically i have no BAT
device, or any trace of working power management in the /dev or /sys.

Can someone please guide me how to get this working...?

Thanks in advance :)

Cs.

Re: Colorly e708q1 and AXP20x support

[Horváth Csaba]

Hi,

Thanks!
Strange, as i tried to compile mainline kernel half a year ago, but it
had no support neither to display or the power chip. I don't even know
what needs to be selected in the config in order to get them working.
(Tried to compile numerous displays in it, but did not help.)
Also, the AXP22x is referenced in the dts, and in the guide, there are
some lines to add to the U-Boot config, but nothing to the kernel. And
of course, does not work.

So if anyone has any clue what to do (mostly what to compile in), i'll
be thankful - i have done some kernel compiling before, but not an
expert. Mostly not in devicetree objects. (It would be enough to have
a stock kernel and OS to boot, as the device will be only a character
display.)

Thanks :)

On Wed, Sep 10, 2025 at 6:33 PM Subair Mullappilly <msubair@hotmail.com> wrote:
>
> Hi
>
> A31 has already upstream support,
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/allwinner?h=v6.17-rc5
>
> your tablet device tree is already there, use upstream kernel, and it
> has support for display,
>
> i never used a31 chip, but used r40,a20 etc..
>
> Subair
>
> On 9/10/25 20:24, Horváth Csaba wrote:
> > Hi,
> >
> > I'm building a wireless display on a Colorfly e708q1 tablet. This is
> > an A31s device, supported by Linux-Sunxi.
> > I have managed to install Arch and get Wifi with an 5.x (stock)
> > kernel, because with newer kernels compiled according to the guide at
> > https://linux-sunxi.org/Colorfly_e708q1 i had no display.  Debian also
> > works, but the device overheats, or freezes because of other cause.
> >
> > With this kernel, the only problem is that the AXP20x power controller
> > is not working, therefore the device is very hot. I could not find any
> > information about how to get the AXP working. Basically i have no BAT
> > device, or any trace of working power management in the /dev or /sys.
> >
> > Can someone please guide me how to get this working...?
> >
> > Thanks in advance :)
> >
> > Cs.
> >

Re: Colorly e708q1 and AXP20x support

[Horváth Csaba]

Hi,

Sorry, if anyone answered to my questions, but i got a message from
the mailing list that some mails were not accepted by my address. I
guess those were sent to trash or spam. (Although i haven't seen any
related to this in spam).
So about mainline support, i discovered in the past that someone
changed in the 6.x kernels and the Colorfly is having issues with the
latest. But it's not a problem, i'm fine with an older kernel, or
would be, if it works.

I set up another SD card for the tablet with 4.17 kernel based Arch.
The symptoms are the same. Tablet runs hot, and battery related
devnodes are not existing.

Did some research, but got nothing. So now
- The tablet runs at fixed 1GHz, so i need to lower the frequency
(tablet is too hot now). Cpupower does not work, as soon i set the
frequency or governor, the device freezes. It would be enough for me
if i can set a powersave/ondemand governor or a lower frequency.
(Tried in /etc/default, kernel parameter, echoing to /sys/class...)
On the 5.5 kernel, setting the scaling works, it lowers the frequency
(at least in the /sys/clas... files), but the tablet is still very
hot. (53-59 Celsius)
- I cannot download a kernel source for the old kernels i use, because
Arch Gitlab is not accepting registrations now...  would try to
compile a kernel, if i had the source.
- I have seen that in dts, the battery is disabled. I tried to enable,
but has no effect (simply compiled to dtb and copied to boot - is this
enough...?).
  The dts is containing a lot of settings for the AXP208  (if i'm
right) chip, but device nodes are not created for battery and so on.
Modules can be loaded, but no effect. This is strange.

Can someone please guide me what can i do in order to get a lower
frequency/temperature and maybe get battery properties?

Thanks in advance,

Cs.

Re: Colorly e708q1 and AXP20x support

[Andre Przywara]

On Thu, 11 Sep 2025 21:29:36 +0200
Horváth Csaba <horvathcsabalaszlo@gmail.com> wrote:

> Hi,
> 
> Thanks!
> Strange, as i tried to compile mainline kernel half a year ago, but it
> had no support neither to display or the power chip. I don't even know
> what needs to be selected in the config in order to get them working.

I guess this is your problem: you are trying to compile a custom kernel
with apparently a made-up config, which isn't easy. As you figured, you
might miss many things, so it's best to use a well-known config as a
base, either sunxi_defconfig, multi_v7_defconfig, or probably the best:
the config from a distro kernel. The latter typically have all
drivers compiling as a module, so it would be able to load what it
needs automatically.

But for a first experiment sunxi_defconfig should be alright,
especially for old SoCs, and compiles most things into the kernel, so
you don't need to mess with modules. You might just run into issues
with distros, though, as you might miss some (new) options there.

Regarding cpufreq: that indeed requires a bunch of drivers to all work
(for instance a thermal sensor: CONFIG_MFD_SUN4I_GPADC), so try
sunxi_defconfig. To avoid running too hot quickly, you can lower the
initial frequency in U-Boot (CONFIG_SYS_CLK_FREQ), also you might want
to lower the initial voltage, for more power savings:
CONFIG_AXP_DCDC3_VOLT. Try 720 MHz at 1.1V, or 480 MHz at 1V, to be on
the safe side.

If you get it booted with that, scan dmesg for PMIC messages, or check
/sys/kernel/debug/regulator/regulator_summary. Messages about dummy
supplies in dmesg are normal, when there are no port supplies in the
DT, and are not fatal.

In general, to find a driver for a certain device:
$ git grep x-powers,axp221 drivers/
...
drivers/mfd/axp20x-i2c.c:       { .compatible = "x-powers,axp221", .data = (void *)AXP221_ID },
...
$ git grep axp20x-i2c.o drivers/mfd/Makefile
drivers/mfd/Makefile:obj-$(CONFIG_MFD_AXP20X_I2C)       += axp20x-i2c.o
                           ^^^^^^^^^^^^^^^^^^^^^
Specifically the AXP uses several driver files, make sure you get all
the options. Refer to dmesg and /sys/kernel/debug/devices_deferred to
find missing drivers.

Hope that helps for a first step, please come back with more specific
information and questions, if needed.

Cheers,
Andre

> (Tried to compile numerous displays in it, but did not help.)
> Also, the AXP22x is referenced in the dts, and in the guide, there are
> some lines to add to the U-Boot config, but nothing to the kernel. And
> of course, does not work.
> 
> So if anyone has any clue what to do (mostly what to compile in), i'll
> be thankful - i have done some kernel compiling before, but not an
> expert. Mostly not in devicetree objects. (It would be enough to have
> a stock kernel and OS to boot, as the device will be only a character
> display.)
> 
> Thanks :)
> 
> On Wed, Sep 10, 2025 at 6:33 PM Subair Mullappilly <msubair@hotmail.com> wrote:
> >
> > Hi
> >
> > A31 has already upstream support,
> >
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/allwinner?h=v6.17-rc5
> >
> > your tablet device tree is already there, use upstream kernel, and it
> > has support for display,
> >
> > i never used a31 chip, but used r40,a20 etc..
> >
> > Subair
> >
> > On 9/10/25 20:24, Horváth Csaba wrote:  
> > > Hi,
> > >
> > > I'm building a wireless display on a Colorfly e708q1 tablet. This is
> > > an A31s device, supported by Linux-Sunxi.
> > > I have managed to install Arch and get Wifi with an 5.x (stock)
> > > kernel, because with newer kernels compiled according to the guide at
> > > https://linux-sunxi.org/Colorfly_e708q1 i had no display.  Debian also
> > > works, but the device overheats, or freezes because of other cause.
> > >
> > > With this kernel, the only problem is that the AXP20x power controller
> > > is not working, therefore the device is very hot. I could not find any
> > > information about how to get the AXP working. Basically i have no BAT
> > > device, or any trace of working power management in the /dev or /sys.
> > >
> > > Can someone please guide me how to get this working...?
> > >
> > > Thanks in advance :)
> > >
> > > Cs.
> > >  
> 

Re: Colorly e708q1 and AXP20x support

[Horváth Csaba]

Hi,

Thanks for your answer! :) I'll have a lot of questions, as i rarely
did a successful kernel compilation in the past, but definitely want
to learn.

Now i managed to try the defconfig only option with latest kernel.
Does not even boot i think, but at least  there is no output to LCD or
HDMI at all. (I tried to do some autologin and output dmesg stuff to a
file, but nothing happened.)
I followed this guide, which seems to be partially outdated.
https://linux-sunxi.org/Colorfly_e708q1 A lot of config changed in the
kernel since it was written, and for example i think this is why i
don't get display and PMIC. (So i don't know which displays to select
to compile in, and so on.)

I have managed to boot the device with an 5.5 stock kernel and Arch
during the summer, get network, and can collect information from that
instance.
I tried to set frequency in U-Boot settings, but seems it did nothing.
But, i did not tried with U-Boot compile options... so i'll give it a
try, thanks.
As a matter of interest, with the 5.5 kernel, there is no
/sys/kernel/debug/regulator/regulator_summary .
I have these  :
[root@alarm alarm]# ls /sys/kernel/debug/regulator/
0-0068-ldo_io0  dldo4                      rtc_ldo     vcc-pg    vdd-cpus
0-0068-ldo_io1  eldo1                      supply_map  vcc-wifi  vdd-gpu
aldo1           eldo2                      usb0-vbus   vcc3v0    vdd-sys-dll
aldo2           eldo3                      vcc-3v0     vcc3v3
avcc            reg-dummy-regulator-dummy  vcc-dram    vcc5v0
dldo3           regulator_summary          vcc-lcd     vdd-cpu

But as soon as i try to set something, it frrezes or does nothing
(echoing freq to file, using cpufreq, etc.)

dmesg contains only this regarding to AXP20x
[root@alarm alarm]# dmesg |grep -i  axp
[    2.120467] axp20x-i2c 0-0068: AXP20x variant AXP221 found
[    2.150559] axp20x-usb-power-supply axp20x-usb-power-supply: DMA mask not set
[    2.163684] axp20x-i2c 0-0068: AXP20X driver loaded
[   10.652559] input: axp20x-pek as
/devices/platform/soc/1f03400.i2c/i2c-0/0-0068/axp221-pek/input/input1
[   10.720847] axp20x-adc axp22x-adc: DMA mask not set

And a lot of dummy regulators. To be more accurate, only dummy regulators :D
[root@alarm alarm]# dmesg |grep dummy
[    0.002712] Console: colour dummy device 80x30
[    2.035323] sun6i-a31-pinctrl 1c20800.pinctrl: 1c20800.pinctrl
supply vcc-pf not found, using dummy regulator
[    2.111902] sun6i-a31-pinctrl 1c20800.pinctrl: 1c20800.pinctrl
supply vcc-pa not found, using dummy regulator
[    2.119381] sun6i-a31-r-pinctrl 1f02c00.pinctrl: 1f02c00.pinctrl
supply vcc-pl not found, using dummy regulator
[    2.129470] dcdc1: supplied by regulator-dummy
[    2.130898] dcdc2: supplied by regulator-dummy
[    2.131746] dcdc3: supplied by regulator-dummy
[    2.132585] dcdc4: supplied by regulator-dummy
[    2.133448] dcdc5: supplied by regulator-dummy
[    2.135439] aldo1: supplied by regulator-dummy
[    2.136268] aldo2: supplied by regulator-dummy
[    2.137123] aldo3: supplied by regulator-dummy
[    2.138508] eldo1: supplied by regulator-dummy
[    2.139374] eldo2: supplied by regulator-dummy
[    2.140217] eldo3: supplied by regulator-dummy
[    2.141077] dldo1: supplied by regulator-dummy
[    2.141907] dldo2: supplied by regulator-dummy
[    2.143906] dldo3: supplied by regulator-dummy
[    2.144762] dldo4: supplied by regulator-dummy
[    2.145619] rtc_ldo: supplied by regulator-dummy
[    2.145905] ldo_io0: supplied by regulator-dummy
[    2.146762] ldo_io1: supplied by regulator-dummy
[    2.166336] sun6i-a31-pinctrl 1c20800.pinctrl: 1c20800.pinctrl
supply vcc-pf not found, using dummy regulator
[    2.167370] sun6i-a31-pinctrl 1c20800.pinctrl: 1c20800.pinctrl
supply vcc-pa not found, using dummy regulator
[    2.230116] usb_phy_generic usb_phy_generic.1.auto:
usb_phy_generic.1.auto supply vcc not found, using dummy regulator

Thanks in advance :)

Cs.

On Sat, Nov 8, 2025 at 1:57 AM Andre Przywara <andre.przywara@arm.com> wrote:
>
> On Thu, 11 Sep 2025 21:29:36 +0200
> Horváth Csaba <horvathcsabalaszlo@gmail.com> wrote:
>
> > Hi,
> >
> > Thanks!
> > Strange, as i tried to compile mainline kernel half a year ago, but it
> > had no support neither to display or the power chip. I don't even know
> > what needs to be selected in the config in order to get them working.
>
> I guess this is your problem: you are trying to compile a custom kernel
> with apparently a made-up config, which isn't easy. As you figured, you
> might miss many things, so it's best to use a well-known config as a
> base, either sunxi_defconfig, multi_v7_defconfig, or probably the best:
> the config from a distro kernel. The latter typically have all
> drivers compiling as a module, so it would be able to load what it
> needs automatically.
>
> But for a first experiment sunxi_defconfig should be alright,
> especially for old SoCs, and compiles most things into the kernel, so
> you don't need to mess with modules. You might just run into issues
> with distros, though, as you might miss some (new) options there.
>
> Regarding cpufreq: that indeed requires a bunch of drivers to all work
> (for instance a thermal sensor: CONFIG_MFD_SUN4I_GPADC), so try
> sunxi_defconfig. To avoid running too hot quickly, you can lower the
> initial frequency in U-Boot (CONFIG_SYS_CLK_FREQ), also you might want
> to lower the initial voltage, for more power savings:
> CONFIG_AXP_DCDC3_VOLT. Try 720 MHz at 1.1V, or 480 MHz at 1V, to be on
> the safe side.
>
> If you get it booted with that, scan dmesg for PMIC messages, or check
> /sys/kernel/debug/regulator/regulator_summary. Messages about dummy
> supplies in dmesg are normal, when there are no port supplies in the
> DT, and are not fatal.
>
> In general, to find a driver for a certain device:
> $ git grep x-powers,axp221 drivers/
> ...
> drivers/mfd/axp20x-i2c.c:       { .compatible = "x-powers,axp221", .data = (void *)AXP221_ID },
> ...
> $ git grep axp20x-i2c.o drivers/mfd/Makefile
> drivers/mfd/Makefile:obj-$(CONFIG_MFD_AXP20X_I2C)       += axp20x-i2c.o
>                            ^^^^^^^^^^^^^^^^^^^^^
> Specifically the AXP uses several driver files, make sure you get all
> the options. Refer to dmesg and /sys/kernel/debug/devices_deferred to
> find missing drivers.
>
> Hope that helps for a first step, please come back with more specific
> information and questions, if needed.
>
> Cheers,
> Andre
>
> > (Tried to compile numerous displays in it, but did not help.)
> > Also, the AXP22x is referenced in the dts, and in the guide, there are
> > some lines to add to the U-Boot config, but nothing to the kernel. And
> > of course, does not work.
> >
> > So if anyone has any clue what to do (mostly what to compile in), i'll
> > be thankful - i have done some kernel compiling before, but not an
> > expert. Mostly not in devicetree objects. (It would be enough to have
> > a stock kernel and OS to boot, as the device will be only a character
> > display.)
> >
> > Thanks :)
> >
> > On Wed, Sep 10, 2025 at 6:33 PM Subair Mullappilly <msubair@hotmail.com> wrote:
> > >
> > > Hi
> > >
> > > A31 has already upstream support,
> > >
> > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/allwinner?h=v6.17-rc5
> > >
> > > your tablet device tree is already there, use upstream kernel, and it
> > > has support for display,
> > >
> > > i never used a31 chip, but used r40,a20 etc..
> > >
> > > Subair
> > >
> > > On 9/10/25 20:24, Horváth Csaba wrote:
> > > > Hi,
> > > >
> > > > I'm building a wireless display on a Colorfly e708q1 tablet. This is
> > > > an A31s device, supported by Linux-Sunxi.
> > > > I have managed to install Arch and get Wifi with an 5.x (stock)
> > > > kernel, because with newer kernels compiled according to the guide at
> > > > https://linux-sunxi.org/Colorfly_e708q1 i had no display.  Debian also
> > > > works, but the device overheats, or freezes because of other cause.
> > > >
> > > > With this kernel, the only problem is that the AXP20x power controller
> > > > is not working, therefore the device is very hot. I could not find any
> > > > information about how to get the AXP working. Basically i have no BAT
> > > > device, or any trace of working power management in the /dev or /sys.
> > > >
> > > > Can someone please guide me how to get this working...?
> > > >
> > > > Thanks in advance :)
> > > >
> > > > Cs.
> > > >
> >
>

Re: Colorly e708q1 and AXP20x support

[Muhammed Subair]

[-- Attachment #1: Type: text/plain, Size: 9880 bytes --]

Hi Horvath

I was checking one of my sunxi sdk 5.10 and 5.14 which was for A527 chip,  and found below
the board is showing A31s chip, and on dtsi it has some cpu tuning.i have attached those dts files.
probably this will help, the SDK is around 15gb , if you need i can provide.


$ ls kernel/linux-5.10/arch/arm/boot/dts/ | grep a31
kirkwood-nsa310a.dts
kirkwood-nsa310.dts
sun6i-a31-app4-evb1.dts
sun6i-a31-colombus.dts
sun6i-a31.dtsi
sun6i-a31-hummingbird.dts
sun6i-a31-i7.dts
sun6i-a31-m9.dts
sun6i-a31-mele-a1000g-quad.dts
sun6i-a31s-colorfly-e708-q1.dts
sun6i-a31s-cs908.dts
sun6i-a31s.dtsi
sun6i-a31s-inet-q972.dts
sun6i-a31s-primo81.dts
sun6i-a31s-sina31s-core.dtsi
sun6i-a31s-sina31s.dts
sun6i-a31s-sinovoip-bpi-m2.dts
sun6i-a31s-yones-toptech-bs1078-v2.dts


$ ls kernel/linux-5.15/arch/arm/boot/dts/ | grep a31
kirkwood-nsa310a.dts
kirkwood-nsa310.dts
sun6i-a31-app4-evb1.dts
sun6i-a31-colombus.dts
sun6i-a31.dtsi
sun6i-a31-hummingbird.dts
sun6i-a31-i7.dts
sun6i-a31-m9.dts
sun6i-a31-mele-a1000g-quad.dts
sun6i-a31s-colorfly-e708-q1.dts
sun6i-a31s-cs908.dts
sun6i-a31s.dtsi
sun6i-a31s-inet-q972.dts
sun6i-a31s-primo81.dts
sun6i-a31s-sina31s-core.dtsi
sun6i-a31s-sina31s.dts
sun6i-a31s-sinovoip-bpi-m2.dts
sun6i-a31s-yones-toptech-bs1078-v2.dts



Subair

On 11/9/25 00:32, Horváth Csaba wrote:

> Hi,
>
> Thanks for your answer! :) I'll have a lot of questions, as i rarely
> did a successful kernel compilation in the past, but definitely want
> to learn.
>
> Now i managed to try the defconfig only option with latest kernel.
> Does not even boot i think, but at least  there is no output to LCD or
> HDMI at all. (I tried to do some autologin and output dmesg stuff to a
> file, but nothing happened.)
> I followed this guide, which seems to be partially outdated.
> https://linux-sunxi.org/Colorfly_e708q1 A lot of config changed in the
> kernel since it was written, and for example i think this is why i
> don't get display and PMIC. (So i don't know which displays to select
> to compile in, and so on.)
>
> I have managed to boot the device with an 5.5 stock kernel and Arch
> during the summer, get network, and can collect information from that
> instance.
> I tried to set frequency in U-Boot settings, but seems it did nothing.
> But, i did not tried with U-Boot compile options... so i'll give it a
> try, thanks.
> As a matter of interest, with the 5.5 kernel, there is no
> /sys/kernel/debug/regulator/regulator_summary .
> I have these  :
> [root@alarm alarm]# ls /sys/kernel/debug/regulator/
> 0-0068-ldo_io0  dldo4                      rtc_ldo     vcc-pg    vdd-cpus
> 0-0068-ldo_io1  eldo1                      supply_map  vcc-wifi  vdd-gpu
> aldo1           eldo2                      usb0-vbus   vcc3v0    vdd-sys-dll
> aldo2           eldo3                      vcc-3v0     vcc3v3
> avcc            reg-dummy-regulator-dummy  vcc-dram    vcc5v0
> dldo3           regulator_summary          vcc-lcd     vdd-cpu
>
> But as soon as i try to set something, it frrezes or does nothing
> (echoing freq to file, using cpufreq, etc.)
>
> dmesg contains only this regarding to AXP20x
> [root@alarm alarm]# dmesg |grep -i  axp
> [    2.120467] axp20x-i2c 0-0068: AXP20x variant AXP221 found
> [    2.150559] axp20x-usb-power-supply axp20x-usb-power-supply: DMA mask not set
> [    2.163684] axp20x-i2c 0-0068: AXP20X driver loaded
> [   10.652559] input: axp20x-pek as
> /devices/platform/soc/1f03400.i2c/i2c-0/0-0068/axp221-pek/input/input1
> [   10.720847] axp20x-adc axp22x-adc: DMA mask not set
>
> And a lot of dummy regulators. To be more accurate, only dummy regulators :D
> [root@alarm alarm]# dmesg |grep dummy
> [    0.002712] Console: colour dummy device 80x30
> [    2.035323] sun6i-a31-pinctrl 1c20800.pinctrl: 1c20800.pinctrl
> supply vcc-pf not found, using dummy regulator
> [    2.111902] sun6i-a31-pinctrl 1c20800.pinctrl: 1c20800.pinctrl
> supply vcc-pa not found, using dummy regulator
> [    2.119381] sun6i-a31-r-pinctrl 1f02c00.pinctrl: 1f02c00.pinctrl
> supply vcc-pl not found, using dummy regulator
> [    2.129470] dcdc1: supplied by regulator-dummy
> [    2.130898] dcdc2: supplied by regulator-dummy
> [    2.131746] dcdc3: supplied by regulator-dummy
> [    2.132585] dcdc4: supplied by regulator-dummy
> [    2.133448] dcdc5: supplied by regulator-dummy
> [    2.135439] aldo1: supplied by regulator-dummy
> [    2.136268] aldo2: supplied by regulator-dummy
> [    2.137123] aldo3: supplied by regulator-dummy
> [    2.138508] eldo1: supplied by regulator-dummy
> [    2.139374] eldo2: supplied by regulator-dummy
> [    2.140217] eldo3: supplied by regulator-dummy
> [    2.141077] dldo1: supplied by regulator-dummy
> [    2.141907] dldo2: supplied by regulator-dummy
> [    2.143906] dldo3: supplied by regulator-dummy
> [    2.144762] dldo4: supplied by regulator-dummy
> [    2.145619] rtc_ldo: supplied by regulator-dummy
> [    2.145905] ldo_io0: supplied by regulator-dummy
> [    2.146762] ldo_io1: supplied by regulator-dummy
> [    2.166336] sun6i-a31-pinctrl 1c20800.pinctrl: 1c20800.pinctrl
> supply vcc-pf not found, using dummy regulator
> [    2.167370] sun6i-a31-pinctrl 1c20800.pinctrl: 1c20800.pinctrl
> supply vcc-pa not found, using dummy regulator
> [    2.230116] usb_phy_generic usb_phy_generic.1.auto:
> usb_phy_generic.1.auto supply vcc not found, using dummy regulator
>
> Thanks in advance :)
>
> Cs.
>
> On Sat, Nov 8, 2025 at 1:57 AM Andre Przywara <andre.przywara@arm.com> wrote:
>> On Thu, 11 Sep 2025 21:29:36 +0200
>> Horváth Csaba <horvathcsabalaszlo@gmail.com> wrote:
>>
>>> Hi,
>>>
>>> Thanks!
>>> Strange, as i tried to compile mainline kernel half a year ago, but it
>>> had no support neither to display or the power chip. I don't even know
>>> what needs to be selected in the config in order to get them working.
>> I guess this is your problem: you are trying to compile a custom kernel
>> with apparently a made-up config, which isn't easy. As you figured, you
>> might miss many things, so it's best to use a well-known config as a
>> base, either sunxi_defconfig, multi_v7_defconfig, or probably the best:
>> the config from a distro kernel. The latter typically have all
>> drivers compiling as a module, so it would be able to load what it
>> needs automatically.
>>
>> But for a first experiment sunxi_defconfig should be alright,
>> especially for old SoCs, and compiles most things into the kernel, so
>> you don't need to mess with modules. You might just run into issues
>> with distros, though, as you might miss some (new) options there.
>>
>> Regarding cpufreq: that indeed requires a bunch of drivers to all work
>> (for instance a thermal sensor: CONFIG_MFD_SUN4I_GPADC), so try
>> sunxi_defconfig. To avoid running too hot quickly, you can lower the
>> initial frequency in U-Boot (CONFIG_SYS_CLK_FREQ), also you might want
>> to lower the initial voltage, for more power savings:
>> CONFIG_AXP_DCDC3_VOLT. Try 720 MHz at 1.1V, or 480 MHz at 1V, to be on
>> the safe side.
>>
>> If you get it booted with that, scan dmesg for PMIC messages, or check
>> /sys/kernel/debug/regulator/regulator_summary. Messages about dummy
>> supplies in dmesg are normal, when there are no port supplies in the
>> DT, and are not fatal.
>>
>> In general, to find a driver for a certain device:
>> $ git grep x-powers,axp221 drivers/
>> ...
>> drivers/mfd/axp20x-i2c.c:       { .compatible = "x-powers,axp221", .data = (void *)AXP221_ID },
>> ...
>> $ git grep axp20x-i2c.o drivers/mfd/Makefile
>> drivers/mfd/Makefile:obj-$(CONFIG_MFD_AXP20X_I2C)       += axp20x-i2c.o
>>                             ^^^^^^^^^^^^^^^^^^^^^
>> Specifically the AXP uses several driver files, make sure you get all
>> the options. Refer to dmesg and /sys/kernel/debug/devices_deferred to
>> find missing drivers.
>>
>> Hope that helps for a first step, please come back with more specific
>> information and questions, if needed.
>>
>> Cheers,
>> Andre
>>
>>> (Tried to compile numerous displays in it, but did not help.)
>>> Also, the AXP22x is referenced in the dts, and in the guide, there are
>>> some lines to add to the U-Boot config, but nothing to the kernel. And
>>> of course, does not work.
>>>
>>> So if anyone has any clue what to do (mostly what to compile in), i'll
>>> be thankful - i have done some kernel compiling before, but not an
>>> expert. Mostly not in devicetree objects. (It would be enough to have
>>> a stock kernel and OS to boot, as the device will be only a character
>>> display.)
>>>
>>> Thanks :)
>>>
>>> On Wed, Sep 10, 2025 at 6:33 PM Subair Mullappilly <msubair@hotmail.com> wrote:
>>>> Hi
>>>>
>>>> A31 has already upstream support,
>>>>
>>>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/allwinner?h=v6.17-rc5
>>>>
>>>> your tablet device tree is already there, use upstream kernel, and it
>>>> has support for display,
>>>>
>>>> i never used a31 chip, but used r40,a20 etc..
>>>>
>>>> Subair
>>>>
>>>> On 9/10/25 20:24, Horváth Csaba wrote:
>>>>> Hi,
>>>>>
>>>>> I'm building a wireless display on a Colorfly e708q1 tablet. This is
>>>>> an A31s device, supported by Linux-Sunxi.
>>>>> I have managed to install Arch and get Wifi with an 5.x (stock)
>>>>> kernel, because with newer kernels compiled according to the guide at
>>>>> https://linux-sunxi.org/Colorfly_e708q1 i had no display.  Debian also
>>>>> works, but the device overheats, or freezes because of other cause.
>>>>>
>>>>> With this kernel, the only problem is that the AXP20x power controller
>>>>> is not working, therefore the device is very hot. I could not find any
>>>>> information about how to get the AXP working. Basically i have no BAT
>>>>> device, or any trace of working power management in the /dev or /sys.
>>>>>
>>>>> Can someone please guide me how to get this working...?
>>>>>
>>>>> Thanks in advance :)
>>>>>
>>>>> Cs.
>>>>>

[-- Attachment #2: sun6i-reference-design-tablet.dtsi --]
[-- Type: text/plain, Size: 4383 bytes --]

/*
 * Copyright 2016 Hans de Goede <hdegoede@redhat.com>
 *
 * This file is dual-licensed: you can use it either under the terms
 * of the GPL or the X11 license, at your option. Note that this dual
 * licensing only applies to this file, and not this project as a
 * whole.
 *
 *  a) This file is free software; you can redistribute it and/or
 *     modify it under the terms of the GNU General Public License as
 *     published by the Free Software Foundation; either version 2 of the
 *     License, or (at your option) any later version.
 *
 *     This file is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 *
 * Or, alternatively,
 *
 *  b) Permission is hereby granted, free of charge, to any person
 *     obtaining a copy of this software and associated documentation
 *     files (the "Software"), to deal in the Software without
 *     restriction, including without limitation the rights to use,
 *     copy, modify, merge, publish, distribute, sublicense, and/or
 *     sell copies of the Software, and to permit persons to whom the
 *     Software is furnished to do so, subject to the following
 *     conditions:
 *
 *     The above copyright notice and this permission notice shall be
 *     included in all copies or substantial portions of the Software.
 *
 *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 *     OTHER DEALINGS IN THE SOFTWARE.
 */

#include "sunxi-common-regulators.dtsi"

#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/input/input.h>

/ {
	aliases {
		serial0 = &uart0;
	};

	chosen {
		stdout-path = "serial0:115200n8";
	};
};

&cpu0 {
	cpu-supply = <&reg_dcdc3>;
};

&ehci0 {
	/* Wifi is connected here */
	status = "okay";
};

&mmc0 {
	pinctrl-names = "default";
	pinctrl-0 = <&mmc0_pins>;
	vmmc-supply = <&reg_dcdc1>;
	bus-width = <4>;
	cd-gpios = <&pio 0 8 GPIO_ACTIVE_LOW>; /* PA8 */
	status = "okay";
};

&p2wi {
	status = "okay";

	axp22x: pmic@68 {
		compatible = "x-powers,axp221";
		reg = <0x68>;
		interrupt-parent = <&r_intc>;
		interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_LOW>;
		drivevbus-supply = <&reg_vcc5v0>;
		x-powers,drive-vbus-en;
	};
};

#include "axp22x.dtsi"

&reg_aldo3 {
	regulator-always-on;
	regulator-min-microvolt = <2700000>;
	regulator-max-microvolt = <3300000>;
	regulator-name = "avcc";
};

&reg_dc1sw {
	regulator-name = "vcc-lcd";
};

&reg_dc5ldo {
	regulator-always-on;
	regulator-min-microvolt = <700000>;
	regulator-max-microvolt = <1320000>;
	regulator-name = "vdd-cpus"; /* This is an educated guess */
};

&reg_dcdc1 {
	regulator-always-on;
	regulator-min-microvolt = <3000000>;
	regulator-max-microvolt = <3000000>;
	regulator-name = "vcc-3v0";
};

&reg_dcdc2 {
	regulator-min-microvolt = <700000>;
	regulator-max-microvolt = <1320000>;
	regulator-name = "vdd-gpu";
};

&reg_dcdc3 {
	regulator-always-on;
	regulator-min-microvolt = <700000>;
	regulator-max-microvolt = <1320000>;
	regulator-name = "vdd-cpu";
};

&reg_dcdc4 {
	regulator-always-on;
	regulator-min-microvolt = <700000>;
	regulator-max-microvolt = <1320000>;
	regulator-name = "vdd-sys-dll";
};

&reg_dcdc5 {
	regulator-always-on;
	regulator-min-microvolt = <1500000>;
	regulator-max-microvolt = <1500000>;
	regulator-name = "vcc-dram";
};

&reg_dldo1 {
	regulator-min-microvolt = <3300000>;
	regulator-max-microvolt = <3300000>;
	regulator-name = "vcc-wifi";
};

&reg_drivevbus {
	regulator-name = "usb0-vbus";
	status = "okay";
};

&simplefb_lcd {
	vcc-lcd-supply = <&reg_dc1sw>;
};

&usb_otg {
	dr_mode = "otg";
	status = "okay";
};

&usb_power_supply {
	status = "okay";
};

&usbphy {
	usb0_id_det-gpios = <&pio 0 15 (GPIO_ACTIVE_HIGH | GPIO_PULL_UP)>; /* PA15 */
	usb0_vbus_power-supply = <&usb_power_supply>;
	usb0_vbus-supply = <&reg_drivevbus>;
	usb1_vbus-supply = <&reg_dldo1>;
	status = "okay";
};

[-- Attachment #3: sun6i-a31s-colorfly-e708-q1.dts --]
[-- Type: audio/vnd.dts, Size: 2517 bytes --]

[-- Attachment #4: sun6i-a31s.dtsi --]
[-- Type: text/plain, Size: 2366 bytes --]

/*
 * Copyright 2014 Hans de Goede <hdegoede@redhat.com>
 *
 * This file is dual-licensed: you can use it either under the terms
 * of the GPL or the X11 license, at your option. Note that this dual
 * licensing only applies to this file, and not this project as a
 * whole.
 *
 *  a) This library is free software; you can redistribute it and/or
 *     modify it under the terms of the GNU General Public License as
 *     published by the Free Software Foundation; either version 2 of the
 *     License, or (at your option) any later version.
 *
 *     This library is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 *
 * Or, alternatively,
 *
 *  b) Permission is hereby granted, free of charge, to any person
 *     obtaining a copy of this software and associated documentation
 *     files (the "Software"), to deal in the Software without
 *     restriction, including without limitation the rights to use,
 *     copy, modify, merge, publish, distribute, sublicense, and/or
 *     sell copies of the Software, and to permit persons to whom the
 *     Software is furnished to do so, subject to the following
 *     conditions:
 *
 *     The above copyright notice and this permission notice shall be
 *     included in all copies or substantial portions of the Software.
 *
 *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 *     OTHER DEALINGS IN THE SOFTWARE.
 */

/*
 * The A31s is the same die as the A31 in a different package, this is
 * reflected by it having different pinctrl compatible everything else is
 * identical.
 */

#include "sun6i-a31.dtsi"

&de {
	compatible = "allwinner,sun6i-a31s-display-engine";
};

&pio {
	compatible = "allwinner,sun6i-a31s-pinctrl";
};

&tcon0 {
	compatible = "allwinner,sun6i-a31s-tcon";
};

[-- Attachment #5: sun6i-a31.dtsi --]
[-- Type: text/plain, Size: 35762 bytes --]

/*
 * Copyright 2013 Maxime Ripard
 *
 * Maxime Ripard <maxime.ripard@free-electrons.com>
 *
 * This file is dual-licensed: you can use it either under the terms
 * of the GPL or the X11 license, at your option. Note that this dual
 * licensing only applies to this file, and not this project as a
 * whole.
 *
 *  a) This file is free software; you can redistribute it and/or
 *     modify it under the terms of the GNU General Public License as
 *     published by the Free Software Foundation; either version 2 of the
 *     License, or (at your option) any later version.
 *
 *     This file is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 *
 * Or, alternatively,
 *
 *  b) Permission is hereby granted, free of charge, to any person
 *     obtaining a copy of this software and associated documentation
 *     files (the "Software"), to deal in the Software without
 *     restriction, including without limitation the rights to use,
 *     copy, modify, merge, publish, distribute, sublicense, and/or
 *     sell copies of the Software, and to permit persons to whom the
 *     Software is furnished to do so, subject to the following
 *     conditions:
 *
 *     The above copyright notice and this permission notice shall be
 *     included in all copies or substantial portions of the Software.
 *
 *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 *     OTHER DEALINGS IN THE SOFTWARE.
 */

#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/thermal/thermal.h>

#include <dt-bindings/clock/sun6i-a31-ccu.h>
#include <dt-bindings/reset/sun6i-a31-ccu.h>

/ {
	interrupt-parent = <&gic>;
	#address-cells = <1>;
	#size-cells = <1>;

	aliases {
		ethernet0 = &gmac;
	};

	chosen {
		#address-cells = <1>;
		#size-cells = <1>;
		ranges;

		simplefb_hdmi: framebuffer-lcd0-hdmi {
			compatible = "allwinner,simple-framebuffer",
				     "simple-framebuffer";
			allwinner,pipeline = "de_be0-lcd0-hdmi";
			clocks = <&ccu CLK_AHB1_BE0>, <&ccu CLK_AHB1_LCD0>,
				 <&ccu CLK_AHB1_HDMI>, <&ccu CLK_DRAM_BE0>,
				 <&ccu CLK_IEP_DRC0>, <&ccu CLK_BE0>,
				 <&ccu CLK_LCD0_CH1>, <&ccu CLK_HDMI>;
			status = "disabled";
		};

		simplefb_lcd: framebuffer-lcd0 {
			compatible = "allwinner,simple-framebuffer",
				     "simple-framebuffer";
			allwinner,pipeline = "de_be0-lcd0";
			clocks = <&ccu CLK_AHB1_BE0>, <&ccu CLK_AHB1_LCD0>,
				 <&ccu CLK_DRAM_BE0>, <&ccu CLK_IEP_DRC0>,
				 <&ccu CLK_BE0>, <&ccu CLK_LCD0_CH0>;
			status = "disabled";
		};
	};

	timer {
		compatible = "arm,armv7-timer";
		interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
			     <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
			     <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
			     <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
		clock-frequency = <24000000>;
		arm,cpu-registers-not-fw-configured;
	};

	cpus {
		enable-method = "allwinner,sun6i-a31";
		#address-cells = <1>;
		#size-cells = <0>;

		cpu0: cpu@0 {
			compatible = "arm,cortex-a7";
			device_type = "cpu";
			reg = <0>;
			clocks = <&ccu CLK_CPU>;
			clock-latency = <244144>; /* 8 32k periods */
			operating-points = <
				/* kHz	  uV */
				1008000	1200000
				864000	1200000
				720000	1100000
				480000	1000000
				>;
			#cooling-cells = <2>;
		};

		cpu1: cpu@1 {
			compatible = "arm,cortex-a7";
			device_type = "cpu";
			reg = <1>;
			clocks = <&ccu CLK_CPU>;
			clock-latency = <244144>; /* 8 32k periods */
			operating-points = <
				/* kHz	  uV */
				1008000	1200000
				864000	1200000
				720000	1100000
				480000	1000000
				>;
			#cooling-cells = <2>;
		};

		cpu2: cpu@2 {
			compatible = "arm,cortex-a7";
			device_type = "cpu";
			reg = <2>;
			clocks = <&ccu CLK_CPU>;
			clock-latency = <244144>; /* 8 32k periods */
			operating-points = <
				/* kHz	  uV */
				1008000	1200000
				864000	1200000
				720000	1100000
				480000	1000000
				>;
			#cooling-cells = <2>;
		};

		cpu3: cpu@3 {
			compatible = "arm,cortex-a7";
			device_type = "cpu";
			reg = <3>;
			clocks = <&ccu CLK_CPU>;
			clock-latency = <244144>; /* 8 32k periods */
			operating-points = <
				/* kHz	  uV */
				1008000	1200000
				864000	1200000
				720000	1100000
				480000	1000000
				>;
			#cooling-cells = <2>;
		};
	};

	thermal-zones {
		cpu-thermal {
			/* milliseconds */
			polling-delay-passive = <250>;
			polling-delay = <1000>;
			thermal-sensors = <&rtp>;

			cooling-maps {
				map0 {
					trip = <&cpu_alert0>;
					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
							 <&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
							 <&cpu2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
							 <&cpu3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
				};
			};

			trips {
				cpu_alert0: cpu_alert0 {
					/* milliCelsius */
					temperature = <70000>;
					hysteresis = <2000>;
					type = "passive";
				};

				cpu_crit: cpu_crit {
					/* milliCelsius */
					temperature = <100000>;
					hysteresis = <2000>;
					type = "critical";
				};
			};
		};
	};

	pmu {
		compatible = "arm,cortex-a7-pmu";
		interrupts = <GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>,
			     <GIC_SPI 121 IRQ_TYPE_LEVEL_HIGH>,
			     <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>,
			     <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>;
	};

	clocks {
		#address-cells = <1>;
		#size-cells = <1>;
		ranges;

		osc24M: clk-24M {
			#clock-cells = <0>;
			compatible = "fixed-clock";
			clock-frequency = <24000000>;
			clock-accuracy = <50000>;
			clock-output-names = "osc24M";
		};

		osc32k: clk-32k {
			#clock-cells = <0>;
			compatible = "fixed-clock";
			clock-frequency = <32768>;
			clock-accuracy = <50000>;
			clock-output-names = "ext_osc32k";
		};

		/*
		 * The following two are dummy clocks, placeholders
		 * used in the gmac_tx clock. The gmac driver will
		 * choose one parent depending on the PHY interface
		 * mode, using clk_set_rate auto-reparenting.
		 *
		 * The actual TX clock rate is not controlled by the
		 * gmac_tx clock.
		 */
		mii_phy_tx_clk: clk-mii-phy-tx {
			#clock-cells = <0>;
			compatible = "fixed-clock";
			clock-frequency = <25000000>;
			clock-output-names = "mii_phy_tx";
		};

		gmac_int_tx_clk: clk-gmac-int-tx {
			#clock-cells = <0>;
			compatible = "fixed-clock";
			clock-frequency = <125000000>;
			clock-output-names = "gmac_int_tx";
		};

		gmac_tx_clk: clk@1c200d0 {
			#clock-cells = <0>;
			compatible = "allwinner,sun7i-a20-gmac-clk";
			reg = <0x01c200d0 0x4>;
			clocks = <&mii_phy_tx_clk>, <&gmac_int_tx_clk>;
			clock-output-names = "gmac_tx";
		};
	};

	de: display-engine {
		compatible = "allwinner,sun6i-a31-display-engine";
		allwinner,pipelines = <&fe0>, <&fe1>;
		status = "disabled";
	};

	soc {
		compatible = "simple-bus";
		#address-cells = <1>;
		#size-cells = <1>;
		ranges;

		dma: dma-controller@1c02000 {
			compatible = "allwinner,sun6i-a31-dma";
			reg = <0x01c02000 0x1000>;
			interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_AHB1_DMA>;
			resets = <&ccu RST_AHB1_DMA>;
			#dma-cells = <1>;
		};

		tcon0: lcd-controller@1c0c000 {
			compatible = "allwinner,sun6i-a31-tcon";
			reg = <0x01c0c000 0x1000>;
			interrupts = <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>;
			dmas = <&dma 11>;
			resets = <&ccu RST_AHB1_LCD0>,
				 <&ccu RST_AHB1_LVDS>;
			reset-names = "lcd",
				      "lvds";
			clocks = <&ccu CLK_AHB1_LCD0>,
				 <&ccu CLK_LCD0_CH0>,
				 <&ccu CLK_LCD0_CH1>,
				 <&ccu 15>;
			clock-names = "ahb",
				      "tcon-ch0",
				      "tcon-ch1",
				      "lvds-alt";
			clock-output-names = "tcon0-pixel-clock";
			#clock-cells = <0>;

			ports {
				#address-cells = <1>;
				#size-cells = <0>;

				tcon0_in: port@0 {
					#address-cells = <1>;
					#size-cells = <0>;
					reg = <0>;

					tcon0_in_drc0: endpoint@0 {
						reg = <0>;
						remote-endpoint = <&drc0_out_tcon0>;
					};

					tcon0_in_drc1: endpoint@1 {
						reg = <1>;
						remote-endpoint = <&drc1_out_tcon0>;
					};
				};

				tcon0_out: port@1 {
					#address-cells = <1>;
					#size-cells = <0>;
					reg = <1>;

					tcon0_out_hdmi: endpoint@1 {
						reg = <1>;
						remote-endpoint = <&hdmi_in_tcon0>;
						allwinner,tcon-channel = <1>;
					};
				};
			};
		};

		tcon1: lcd-controller@1c0d000 {
			compatible = "allwinner,sun6i-a31-tcon";
			reg = <0x01c0d000 0x1000>;
			interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
			dmas = <&dma 12>;
			resets = <&ccu RST_AHB1_LCD1>,
				 <&ccu RST_AHB1_LVDS>;
			reset-names = "lcd", "lvds";
			clocks = <&ccu CLK_AHB1_LCD1>,
				 <&ccu CLK_LCD1_CH0>,
				 <&ccu CLK_LCD1_CH1>,
				 <&ccu 15>;
			clock-names = "ahb",
				      "tcon-ch0",
				      "tcon-ch1",
				      "lvds-alt";
			clock-output-names = "tcon1-pixel-clock";
			#clock-cells = <0>;

			ports {
				#address-cells = <1>;
				#size-cells = <0>;

				tcon1_in: port@0 {
					#address-cells = <1>;
					#size-cells = <0>;
					reg = <0>;

					tcon1_in_drc0: endpoint@0 {
						reg = <0>;
						remote-endpoint = <&drc0_out_tcon1>;
					};

					tcon1_in_drc1: endpoint@1 {
						reg = <1>;
						remote-endpoint = <&drc1_out_tcon1>;
					};
				};

				tcon1_out: port@1 {
					#address-cells = <1>;
					#size-cells = <0>;
					reg = <1>;

					tcon1_out_hdmi: endpoint@1 {
						reg = <1>;
						remote-endpoint = <&hdmi_in_tcon1>;
						allwinner,tcon-channel = <1>;
					};
				};
			};
		};

		mmc0: mmc@1c0f000 {
			compatible = "allwinner,sun7i-a20-mmc";
			reg = <0x01c0f000 0x1000>;
			clocks = <&ccu CLK_AHB1_MMC0>,
				 <&ccu CLK_MMC0>,
				 <&ccu CLK_MMC0_OUTPUT>,
				 <&ccu CLK_MMC0_SAMPLE>;
			clock-names = "ahb",
				      "mmc",
				      "output",
				      "sample";
			resets = <&ccu RST_AHB1_MMC0>;
			reset-names = "ahb";
			interrupts = <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>;
			pinctrl-names = "default";
			pinctrl-0 = <&mmc0_pins>;
			status = "disabled";
			#address-cells = <1>;
			#size-cells = <0>;
		};

		mmc1: mmc@1c10000 {
			compatible = "allwinner,sun7i-a20-mmc";
			reg = <0x01c10000 0x1000>;
			clocks = <&ccu CLK_AHB1_MMC1>,
				 <&ccu CLK_MMC1>,
				 <&ccu CLK_MMC1_OUTPUT>,
				 <&ccu CLK_MMC1_SAMPLE>;
			clock-names = "ahb",
				      "mmc",
				      "output",
				      "sample";
			resets = <&ccu RST_AHB1_MMC1>;
			reset-names = "ahb";
			interrupts = <GIC_SPI 61 IRQ_TYPE_LEVEL_HIGH>;
			pinctrl-names = "default";
			pinctrl-0 = <&mmc1_pins>;
			status = "disabled";
			#address-cells = <1>;
			#size-cells = <0>;
		};

		mmc2: mmc@1c11000 {
			compatible = "allwinner,sun7i-a20-mmc";
			reg = <0x01c11000 0x1000>;
			clocks = <&ccu CLK_AHB1_MMC2>,
				 <&ccu CLK_MMC2>,
				 <&ccu CLK_MMC2_OUTPUT>,
				 <&ccu CLK_MMC2_SAMPLE>;
			clock-names = "ahb",
				      "mmc",
				      "output",
				      "sample";
			resets = <&ccu RST_AHB1_MMC2>;
			reset-names = "ahb";
			interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
			status = "disabled";
			#address-cells = <1>;
			#size-cells = <0>;
		};

		mmc3: mmc@1c12000 {
			compatible = "allwinner,sun7i-a20-mmc";
			reg = <0x01c12000 0x1000>;
			clocks = <&ccu CLK_AHB1_MMC3>,
				 <&ccu CLK_MMC3>,
				 <&ccu CLK_MMC3_OUTPUT>,
				 <&ccu CLK_MMC3_SAMPLE>;
			clock-names = "ahb",
				      "mmc",
				      "output",
				      "sample";
			resets = <&ccu RST_AHB1_MMC3>;
			reset-names = "ahb";
			interrupts = <GIC_SPI 63 IRQ_TYPE_LEVEL_HIGH>;
			status = "disabled";
			#address-cells = <1>;
			#size-cells = <0>;
		};

		hdmi: hdmi@1c16000 {
			compatible = "allwinner,sun6i-a31-hdmi";
			reg = <0x01c16000 0x1000>;
			interrupts = <GIC_SPI 88 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_AHB1_HDMI>, <&ccu CLK_HDMI>,
				 <&ccu CLK_HDMI_DDC>,
				 <&ccu CLK_PLL_VIDEO0_2X>,
				 <&ccu CLK_PLL_VIDEO1_2X>;
			clock-names = "ahb", "mod", "ddc", "pll-0", "pll-1";
			resets = <&ccu RST_AHB1_HDMI>;
			dma-names = "ddc-tx", "ddc-rx", "audio-tx";
			dmas = <&dma 13>, <&dma 13>, <&dma 14>;
			status = "disabled";

			ports {
				#address-cells = <1>;
				#size-cells = <0>;

				hdmi_in: port@0 {
					#address-cells = <1>;
					#size-cells = <0>;
					reg = <0>;

					hdmi_in_tcon0: endpoint@0 {
						reg = <0>;
						remote-endpoint = <&tcon0_out_hdmi>;
					};

					hdmi_in_tcon1: endpoint@1 {
						reg = <1>;
						remote-endpoint = <&tcon1_out_hdmi>;
					};
				};

				hdmi_out: port@1 {
					reg = <1>;
				};
			};
		};

		usb_otg: usb@1c19000 {
			compatible = "allwinner,sun6i-a31-musb";
			reg = <0x01c19000 0x0400>;
			clocks = <&ccu CLK_AHB1_OTG>;
			resets = <&ccu RST_AHB1_OTG>;
			interrupts = <GIC_SPI 71 IRQ_TYPE_LEVEL_HIGH>;
			interrupt-names = "mc";
			phys = <&usbphy 0>;
			phy-names = "usb";
			extcon = <&usbphy 0>;
			dr_mode = "otg";
			status = "disabled";
		};

		usbphy: phy@1c19400 {
			compatible = "allwinner,sun6i-a31-usb-phy";
			reg = <0x01c19400 0x10>,
			      <0x01c1a800 0x4>,
			      <0x01c1b800 0x4>;
			reg-names = "phy_ctrl",
				    "pmu1",
				    "pmu2";
			clocks = <&ccu CLK_USB_PHY0>,
				 <&ccu CLK_USB_PHY1>,
				 <&ccu CLK_USB_PHY2>;
			clock-names = "usb0_phy",
				      "usb1_phy",
				      "usb2_phy";
			resets = <&ccu RST_USB_PHY0>,
				 <&ccu RST_USB_PHY1>,
				 <&ccu RST_USB_PHY2>;
			reset-names = "usb0_reset",
				      "usb1_reset",
				      "usb2_reset";
			status = "disabled";
			#phy-cells = <1>;
		};

		ehci0: usb@1c1a000 {
			compatible = "allwinner,sun6i-a31-ehci", "generic-ehci";
			reg = <0x01c1a000 0x100>;
			interrupts = <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_AHB1_EHCI0>;
			resets = <&ccu RST_AHB1_EHCI0>;
			phys = <&usbphy 1>;
			phy-names = "usb";
			status = "disabled";
		};

		ohci0: usb@1c1a400 {
			compatible = "allwinner,sun6i-a31-ohci", "generic-ohci";
			reg = <0x01c1a400 0x100>;
			interrupts = <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_AHB1_OHCI0>, <&ccu CLK_USB_OHCI0>;
			resets = <&ccu RST_AHB1_OHCI0>;
			phys = <&usbphy 1>;
			phy-names = "usb";
			status = "disabled";
		};

		ehci1: usb@1c1b000 {
			compatible = "allwinner,sun6i-a31-ehci", "generic-ehci";
			reg = <0x01c1b000 0x100>;
			interrupts = <GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_AHB1_EHCI1>;
			resets = <&ccu RST_AHB1_EHCI1>;
			phys = <&usbphy 2>;
			phy-names = "usb";
			status = "disabled";
		};

		ohci1: usb@1c1b400 {
			compatible = "allwinner,sun6i-a31-ohci", "generic-ohci";
			reg = <0x01c1b400 0x100>;
			interrupts = <GIC_SPI 75 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_AHB1_OHCI1>, <&ccu CLK_USB_OHCI1>;
			resets = <&ccu RST_AHB1_OHCI1>;
			phys = <&usbphy 2>;
			phy-names = "usb";
			status = "disabled";
		};

		ohci2: usb@1c1c400 {
			compatible = "allwinner,sun6i-a31-ohci", "generic-ohci";
			reg = <0x01c1c400 0x100>;
			interrupts = <GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_AHB1_OHCI2>, <&ccu CLK_USB_OHCI2>;
			resets = <&ccu RST_AHB1_OHCI2>;
			status = "disabled";
		};

		ccu: clock@1c20000 {
			compatible = "allwinner,sun6i-a31-ccu";
			reg = <0x01c20000 0x400>;
			clocks = <&osc24M>, <&rtc 0>;
			clock-names = "hosc", "losc";
			#clock-cells = <1>;
			#reset-cells = <1>;
		};

		pio: pinctrl@1c20800 {
			compatible = "allwinner,sun6i-a31-pinctrl";
			reg = <0x01c20800 0x400>;
			interrupt-parent = <&r_intc>;
			interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 15 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 17 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_APB1_PIO>, <&osc24M>, <&rtc 0>;
			clock-names = "apb", "hosc", "losc";
			gpio-controller;
			interrupt-controller;
			#interrupt-cells = <3>;
			#gpio-cells = <3>;

			gmac_gmii_pins: gmac-gmii-pins {
				pins = "PA0", "PA1", "PA2", "PA3",
						"PA4", "PA5", "PA6", "PA7",
						"PA8", "PA9", "PA10", "PA11",
						"PA12", "PA13", "PA14",	"PA15",
						"PA16", "PA17", "PA18", "PA19",
						"PA20", "PA21", "PA22", "PA23",
						"PA24", "PA25", "PA26", "PA27";
				function = "gmac";
				/*
				 * data lines in GMII mode run at 125MHz and
				 * might need a higher signal drive strength
				 */
				drive-strength = <30>;
			};

			gmac_mii_pins: gmac-mii-pins {
				pins = "PA0", "PA1", "PA2", "PA3",
						"PA8", "PA9", "PA11",
						"PA12", "PA13", "PA14", "PA19",
						"PA20", "PA21", "PA22", "PA23",
						"PA24", "PA26", "PA27";
				function = "gmac";
			};

			gmac_rgmii_pins: gmac-rgmii-pins {
				pins = "PA0", "PA1", "PA2", "PA3",
						"PA9", "PA10", "PA11",
						"PA12", "PA13", "PA14", "PA19",
						"PA20", "PA25", "PA26", "PA27";
				function = "gmac";
				/*
				 * data lines in RGMII mode use DDR mode
				 * and need a higher signal drive strength
				 */
				drive-strength = <40>;
			};

			i2c0_pins: i2c0-pins {
				pins = "PH14", "PH15";
				function = "i2c0";
			};

			i2c1_pins: i2c1-pins {
				pins = "PH16", "PH17";
				function = "i2c1";
			};

			i2c2_pins: i2c2-pins {
				pins = "PH18", "PH19";
				function = "i2c2";
			};

			lcd0_rgb888_pins: lcd0-rgb888-pins {
				pins = "PD0", "PD1", "PD2", "PD3",
						 "PD4", "PD5", "PD6", "PD7",
						 "PD8", "PD9", "PD10", "PD11",
						 "PD12", "PD13", "PD14", "PD15",
						 "PD16", "PD17", "PD18", "PD19",
						 "PD20", "PD21", "PD22", "PD23",
						 "PD24", "PD25", "PD26", "PD27";
				function = "lcd0";
			};

			mmc0_pins: mmc0-pins {
				pins = "PF0", "PF1", "PF2",
						 "PF3", "PF4", "PF5";
				function = "mmc0";
				drive-strength = <30>;
				bias-pull-up;
			};

			mmc1_pins: mmc1-pins {
				pins = "PG0", "PG1", "PG2", "PG3",
						 "PG4", "PG5";
				function = "mmc1";
				drive-strength = <30>;
				bias-pull-up;
			};

			mmc2_4bit_pins: mmc2-4bit-pins {
				pins = "PC6", "PC7", "PC8", "PC9",
						 "PC10", "PC11";
				function = "mmc2";
				drive-strength = <30>;
				bias-pull-up;
			};

			mmc2_8bit_emmc_pins: mmc2-8bit-emmc-pins {
				pins = "PC6", "PC7", "PC8", "PC9",
						 "PC10", "PC11", "PC12",
						 "PC13", "PC14", "PC15",
						 "PC24";
				function = "mmc2";
				drive-strength = <30>;
				bias-pull-up;
			};

			mmc3_8bit_emmc_pins: mmc3-8bit-emmc-pins {
				pins = "PC6", "PC7", "PC8", "PC9",
						 "PC10", "PC11", "PC12",
						 "PC13", "PC14", "PC15",
						 "PC24";
				function = "mmc3";
				drive-strength = <40>;
				bias-pull-up;
			};

			spdif_tx_pin: spdif-tx-pin {
				pins = "PH28";
				function = "spdif";
			};

			uart0_ph_pins: uart0-ph-pins {
				pins = "PH20", "PH21";
				function = "uart0";
			};
		};

		timer@1c20c00 {
			compatible = "allwinner,sun4i-a10-timer";
			reg = <0x01c20c00 0xa0>;
			interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 22 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&osc24M>;
		};

		wdt1: watchdog@1c20ca0 {
			compatible = "allwinner,sun6i-a31-wdt";
			reg = <0x01c20ca0 0x20>;
			interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&osc24M>;
		};

		spdif: spdif@1c21000 {
			#sound-dai-cells = <0>;
			compatible = "allwinner,sun6i-a31-spdif";
			reg = <0x01c21000 0x400>;
			interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_APB1_SPDIF>, <&ccu CLK_SPDIF>;
			resets = <&ccu RST_APB1_SPDIF>;
			clock-names = "apb", "spdif";
			dmas = <&dma 2>, <&dma 2>;
			dma-names = "rx", "tx";
			status = "disabled";
		};

		i2s0: i2s@1c22000 {
			#sound-dai-cells = <0>;
			compatible = "allwinner,sun6i-a31-i2s";
			reg = <0x01c22000 0x400>;
			interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_APB1_DAUDIO0>, <&ccu CLK_DAUDIO0>;
			resets = <&ccu RST_APB1_DAUDIO0>;
			clock-names = "apb", "mod";
			dmas = <&dma 3>, <&dma 3>;
			dma-names = "rx", "tx";
			status = "disabled";
		};

		i2s1: i2s@1c22400 {
			#sound-dai-cells = <0>;
			compatible = "allwinner,sun6i-a31-i2s";
			reg = <0x01c22400 0x400>;
			interrupts = <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_APB1_DAUDIO1>, <&ccu CLK_DAUDIO1>;
			resets = <&ccu RST_APB1_DAUDIO1>;
			clock-names = "apb", "mod";
			dmas = <&dma 4>, <&dma 4>;
			dma-names = "rx", "tx";
			status = "disabled";
		};

		lradc: lradc@1c22800 {
			compatible = "allwinner,sun4i-a10-lradc-keys";
			reg = <0x01c22800 0x100>;
			interrupt-parent = <&r_intc>;
			interrupts = <GIC_SPI 30 IRQ_TYPE_LEVEL_HIGH>;
			status = "disabled";
		};

		rtp: rtp@1c25000 {
			compatible = "allwinner,sun6i-a31-ts";
			reg = <0x01c25000 0x100>;
			interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>;
			#thermal-sensor-cells = <0>;
		};

		uart0: serial@1c28000 {
			compatible = "snps,dw-apb-uart";
			reg = <0x01c28000 0x400>;
			interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>;
			reg-shift = <2>;
			reg-io-width = <4>;
			clocks = <&ccu CLK_APB2_UART0>;
			resets = <&ccu RST_APB2_UART0>;
			dmas = <&dma 6>, <&dma 6>;
			dma-names = "rx", "tx";
			status = "disabled";
		};

		uart1: serial@1c28400 {
			compatible = "snps,dw-apb-uart";
			reg = <0x01c28400 0x400>;
			interrupts = <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>;
			reg-shift = <2>;
			reg-io-width = <4>;
			clocks = <&ccu CLK_APB2_UART1>;
			resets = <&ccu RST_APB2_UART1>;
			dmas = <&dma 7>, <&dma 7>;
			dma-names = "rx", "tx";
			status = "disabled";
		};

		uart2: serial@1c28800 {
			compatible = "snps,dw-apb-uart";
			reg = <0x01c28800 0x400>;
			interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>;
			reg-shift = <2>;
			reg-io-width = <4>;
			clocks = <&ccu CLK_APB2_UART2>;
			resets = <&ccu RST_APB2_UART2>;
			dmas = <&dma 8>, <&dma 8>;
			dma-names = "rx", "tx";
			status = "disabled";
		};

		uart3: serial@1c28c00 {
			compatible = "snps,dw-apb-uart";
			reg = <0x01c28c00 0x400>;
			interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>;
			reg-shift = <2>;
			reg-io-width = <4>;
			clocks = <&ccu CLK_APB2_UART3>;
			resets = <&ccu RST_APB2_UART3>;
			dmas = <&dma 9>, <&dma 9>;
			dma-names = "rx", "tx";
			status = "disabled";
		};

		uart4: serial@1c29000 {
			compatible = "snps,dw-apb-uart";
			reg = <0x01c29000 0x400>;
			interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
			reg-shift = <2>;
			reg-io-width = <4>;
			clocks = <&ccu CLK_APB2_UART4>;
			resets = <&ccu RST_APB2_UART4>;
			dmas = <&dma 10>, <&dma 10>;
			dma-names = "rx", "tx";
			status = "disabled";
		};

		uart5: serial@1c29400 {
			compatible = "snps,dw-apb-uart";
			reg = <0x01c29400 0x400>;
			interrupts = <GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>;
			reg-shift = <2>;
			reg-io-width = <4>;
			clocks = <&ccu CLK_APB2_UART5>;
			resets = <&ccu RST_APB2_UART5>;
			dmas = <&dma 22>, <&dma 22>;
			dma-names = "rx", "tx";
			status = "disabled";
		};

		i2c0: i2c@1c2ac00 {
			compatible = "allwinner,sun6i-a31-i2c";
			reg = <0x01c2ac00 0x400>;
			interrupts = <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_APB2_I2C0>;
			resets = <&ccu RST_APB2_I2C0>;
			pinctrl-names = "default";
			pinctrl-0 = <&i2c0_pins>;
			status = "disabled";
			#address-cells = <1>;
			#size-cells = <0>;
		};

		i2c1: i2c@1c2b000 {
			compatible = "allwinner,sun6i-a31-i2c";
			reg = <0x01c2b000 0x400>;
			interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_APB2_I2C1>;
			resets = <&ccu RST_APB2_I2C1>;
			pinctrl-names = "default";
			pinctrl-0 = <&i2c1_pins>;
			status = "disabled";
			#address-cells = <1>;
			#size-cells = <0>;
		};

		i2c2: i2c@1c2b400 {
			compatible = "allwinner,sun6i-a31-i2c";
			reg = <0x01c2b400 0x400>;
			interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_APB2_I2C2>;
			resets = <&ccu RST_APB2_I2C2>;
			pinctrl-names = "default";
			pinctrl-0 = <&i2c2_pins>;
			status = "disabled";
			#address-cells = <1>;
			#size-cells = <0>;
		};

		i2c3: i2c@1c2b800 {
			compatible = "allwinner,sun6i-a31-i2c";
			reg = <0x01c2b800 0x400>;
			interrupts = <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_APB2_I2C3>;
			resets = <&ccu RST_APB2_I2C3>;
			status = "disabled";
			#address-cells = <1>;
			#size-cells = <0>;
		};

		gmac: ethernet@1c30000 {
			compatible = "allwinner,sun7i-a20-gmac";
			reg = <0x01c30000 0x1054>;
			interrupts = <GIC_SPI 82 IRQ_TYPE_LEVEL_HIGH>;
			interrupt-names = "macirq";
			clocks = <&ccu CLK_AHB1_EMAC>, <&gmac_tx_clk>;
			clock-names = "stmmaceth", "allwinner_gmac_tx";
			resets = <&ccu RST_AHB1_EMAC>;
			reset-names = "stmmaceth";
			snps,pbl = <2>;
			snps,fixed-burst;
			snps,force_sf_dma_mode;
			status = "disabled";

			mdio: mdio {
				compatible = "snps,dwmac-mdio";
				#address-cells = <1>;
				#size-cells = <0>;
			};
		};

		crypto: crypto-engine@1c15000 {
			compatible = "allwinner,sun6i-a31-crypto",
				     "allwinner,sun4i-a10-crypto";
			reg = <0x01c15000 0x1000>;
			interrupts = <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_AHB1_SS>, <&ccu CLK_SS>;
			clock-names = "ahb", "mod";
			resets = <&ccu RST_AHB1_SS>;
			reset-names = "ahb";
		};

		codec: codec@1c22c00 {
			#sound-dai-cells = <0>;
			compatible = "allwinner,sun6i-a31-codec";
			reg = <0x01c22c00 0x400>;
			interrupts = <GIC_SPI 29 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_APB1_CODEC>, <&ccu CLK_CODEC>;
			clock-names = "apb", "codec";
			resets = <&ccu RST_APB1_CODEC>;
			dmas = <&dma 15>, <&dma 15>;
			dma-names = "rx", "tx";
			status = "disabled";
		};

		timer@1c60000 {
			compatible = "allwinner,sun6i-a31-hstimer",
				     "allwinner,sun7i-a20-hstimer";
			reg = <0x01c60000 0x1000>;
			interrupts = <GIC_SPI 51 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 52 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 53 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 54 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_AHB1_HSTIMER>;
			resets = <&ccu RST_AHB1_HSTIMER>;
		};

		spi0: spi@1c68000 {
			compatible = "allwinner,sun6i-a31-spi";
			reg = <0x01c68000 0x1000>;
			interrupts = <GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_AHB1_SPI0>, <&ccu CLK_SPI0>;
			clock-names = "ahb", "mod";
			dmas = <&dma 23>, <&dma 23>;
			dma-names = "rx", "tx";
			resets = <&ccu RST_AHB1_SPI0>;
			status = "disabled";
			#address-cells = <1>;
			#size-cells = <0>;
		};

		spi1: spi@1c69000 {
			compatible = "allwinner,sun6i-a31-spi";
			reg = <0x01c69000 0x1000>;
			interrupts = <GIC_SPI 66 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_AHB1_SPI1>, <&ccu CLK_SPI1>;
			clock-names = "ahb", "mod";
			dmas = <&dma 24>, <&dma 24>;
			dma-names = "rx", "tx";
			resets = <&ccu RST_AHB1_SPI1>;
			status = "disabled";
			#address-cells = <1>;
			#size-cells = <0>;
		};

		spi2: spi@1c6a000 {
			compatible = "allwinner,sun6i-a31-spi";
			reg = <0x01c6a000 0x1000>;
			interrupts = <GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_AHB1_SPI2>, <&ccu CLK_SPI2>;
			clock-names = "ahb", "mod";
			dmas = <&dma 25>, <&dma 25>;
			dma-names = "rx", "tx";
			resets = <&ccu RST_AHB1_SPI2>;
			status = "disabled";
			#address-cells = <1>;
			#size-cells = <0>;
		};

		spi3: spi@1c6b000 {
			compatible = "allwinner,sun6i-a31-spi";
			reg = <0x01c6b000 0x1000>;
			interrupts = <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_AHB1_SPI3>, <&ccu CLK_SPI3>;
			clock-names = "ahb", "mod";
			dmas = <&dma 26>, <&dma 26>;
			dma-names = "rx", "tx";
			resets = <&ccu RST_AHB1_SPI3>;
			status = "disabled";
			#address-cells = <1>;
			#size-cells = <0>;
		};

		gic: interrupt-controller@1c81000 {
			compatible = "arm,gic-400";
			reg = <0x01c81000 0x1000>,
			      <0x01c82000 0x2000>,
			      <0x01c84000 0x2000>,
			      <0x01c86000 0x2000>;
			interrupt-controller;
			#interrupt-cells = <3>;
			interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
		};

		fe0: display-frontend@1e00000 {
			compatible = "allwinner,sun6i-a31-display-frontend";
			reg = <0x01e00000 0x20000>;
			interrupts = <GIC_SPI 93 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_AHB1_FE0>, <&ccu CLK_FE0>,
				 <&ccu CLK_DRAM_FE0>;
			clock-names = "ahb", "mod",
				      "ram";
			resets = <&ccu RST_AHB1_FE0>;

			ports {
				#address-cells = <1>;
				#size-cells = <0>;

				fe0_out: port@1 {
					#address-cells = <1>;
					#size-cells = <0>;
					reg = <1>;

					fe0_out_be0: endpoint@0 {
						reg = <0>;
						remote-endpoint = <&be0_in_fe0>;
					};

					fe0_out_be1: endpoint@1 {
						reg = <1>;
						remote-endpoint = <&be1_in_fe0>;
					};
				};
			};
		};

		fe1: display-frontend@1e20000 {
			compatible = "allwinner,sun6i-a31-display-frontend";
			reg = <0x01e20000 0x20000>;
			interrupts = <GIC_SPI 94 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_AHB1_FE1>, <&ccu CLK_FE1>,
				 <&ccu CLK_DRAM_FE1>;
			clock-names = "ahb", "mod",
				      "ram";
			resets = <&ccu RST_AHB1_FE1>;

			ports {
				#address-cells = <1>;
				#size-cells = <0>;

				fe1_out: port@1 {
					#address-cells = <1>;
					#size-cells = <0>;
					reg = <1>;

					fe1_out_be0: endpoint@0 {
						reg = <0>;
						remote-endpoint = <&be0_in_fe1>;
					};

					fe1_out_be1: endpoint@1 {
						reg = <1>;
						remote-endpoint = <&be1_in_fe1>;
					};
				};
			};
		};

		be1: display-backend@1e40000 {
			compatible = "allwinner,sun6i-a31-display-backend";
			reg = <0x01e40000 0x10000>;
			interrupts = <GIC_SPI 96 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_AHB1_BE1>, <&ccu CLK_BE1>,
				 <&ccu CLK_DRAM_BE1>;
			clock-names = "ahb", "mod",
				      "ram";
			resets = <&ccu RST_AHB1_BE1>;

			ports {
				#address-cells = <1>;
				#size-cells = <0>;

				be1_in: port@0 {
					#address-cells = <1>;
					#size-cells = <0>;
					reg = <0>;

					be1_in_fe0: endpoint@0 {
						reg = <0>;
						remote-endpoint = <&fe0_out_be1>;
					};

					be1_in_fe1: endpoint@1 {
						reg = <1>;
						remote-endpoint = <&fe1_out_be1>;
					};
				};

				be1_out: port@1 {
					#address-cells = <1>;
					#size-cells = <0>;
					reg = <1>;

					be1_out_drc1: endpoint@1 {
						reg = <1>;
						remote-endpoint = <&drc1_in_be1>;
					};
				};
			};
		};

		drc1: drc@1e50000 {
			compatible = "allwinner,sun6i-a31-drc";
			reg = <0x01e50000 0x10000>;
			interrupts = <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_AHB1_DRC1>, <&ccu CLK_IEP_DRC1>,
				 <&ccu CLK_DRAM_DRC1>;
			clock-names = "ahb", "mod",
				      "ram";
			resets = <&ccu RST_AHB1_DRC1>;

			ports {
				#address-cells = <1>;
				#size-cells = <0>;

				drc1_in: port@0 {
					#address-cells = <1>;
					#size-cells = <0>;
					reg = <0>;

					drc1_in_be1: endpoint@1 {
						reg = <1>;
						remote-endpoint = <&be1_out_drc1>;
					};
				};

				drc1_out: port@1 {
					#address-cells = <1>;
					#size-cells = <0>;
					reg = <1>;

					drc1_out_tcon0: endpoint@0 {
						reg = <0>;
						remote-endpoint = <&tcon0_in_drc1>;
					};

					drc1_out_tcon1: endpoint@1 {
						reg = <1>;
						remote-endpoint = <&tcon1_in_drc1>;
					};
				};
			};
		};

		be0: display-backend@1e60000 {
			compatible = "allwinner,sun6i-a31-display-backend";
			reg = <0x01e60000 0x10000>;
			interrupts = <GIC_SPI 95 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_AHB1_BE0>, <&ccu CLK_BE0>,
				 <&ccu CLK_DRAM_BE0>;
			clock-names = "ahb", "mod",
				      "ram";
			resets = <&ccu RST_AHB1_BE0>;

			ports {
				#address-cells = <1>;
				#size-cells = <0>;

				be0_in: port@0 {
					#address-cells = <1>;
					#size-cells = <0>;
					reg = <0>;

					be0_in_fe0: endpoint@0 {
						reg = <0>;
						remote-endpoint = <&fe0_out_be0>;
					};

					be0_in_fe1: endpoint@1 {
						reg = <1>;
						remote-endpoint = <&fe1_out_be0>;
					};
				};

				be0_out: port@1 {
					reg = <1>;

					be0_out_drc0: endpoint {
						remote-endpoint = <&drc0_in_be0>;
					};
				};
			};
		};

		drc0: drc@1e70000 {
			compatible = "allwinner,sun6i-a31-drc";
			reg = <0x01e70000 0x10000>;
			interrupts = <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&ccu CLK_AHB1_DRC0>, <&ccu CLK_IEP_DRC0>,
				 <&ccu CLK_DRAM_DRC0>;
			clock-names = "ahb", "mod",
				      "ram";
			resets = <&ccu RST_AHB1_DRC0>;

			ports {
				#address-cells = <1>;
				#size-cells = <0>;

				drc0_in: port@0 {
					reg = <0>;

					drc0_in_be0: endpoint {
						remote-endpoint = <&be0_out_drc0>;
					};
				};

				drc0_out: port@1 {
					#address-cells = <1>;
					#size-cells = <0>;
					reg = <1>;

					drc0_out_tcon0: endpoint@0 {
						reg = <0>;
						remote-endpoint = <&tcon0_in_drc0>;
					};

					drc0_out_tcon1: endpoint@1 {
						reg = <1>;
						remote-endpoint = <&tcon1_in_drc0>;
					};
				};
			};
		};

		rtc: rtc@1f00000 {
			#clock-cells = <1>;
			compatible = "allwinner,sun6i-a31-rtc";
			reg = <0x01f00000 0x54>;
			interrupt-parent = <&r_intc>;
			interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&osc32k>;
			clock-output-names = "osc32k";
		};

		r_intc: interrupt-controller@1f00c00 {
			compatible = "allwinner,sun6i-a31-r-intc";
			interrupt-controller;
			#interrupt-cells = <3>;
			reg = <0x01f00c00 0x400>;
			interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
		};

		prcm@1f01400 {
			compatible = "allwinner,sun6i-a31-prcm";
			reg = <0x01f01400 0x200>;

			ar100: ar100_clk {
				compatible = "allwinner,sun6i-a31-ar100-clk";
				#clock-cells = <0>;
				clocks = <&rtc 0>, <&osc24M>,
					 <&ccu CLK_PLL_PERIPH>,
					 <&ccu CLK_PLL_PERIPH>;
				clock-output-names = "ar100";
			};

			ahb0: ahb0_clk {
				compatible = "fixed-factor-clock";
				#clock-cells = <0>;
				clock-div = <1>;
				clock-mult = <1>;
				clocks = <&ar100>;
				clock-output-names = "ahb0";
			};

			apb0: apb0_clk {
				compatible = "allwinner,sun6i-a31-apb0-clk";
				#clock-cells = <0>;
				clocks = <&ahb0>;
				clock-output-names = "apb0";
			};

			apb0_gates: apb0_gates_clk {
				compatible = "allwinner,sun6i-a31-apb0-gates-clk";
				#clock-cells = <1>;
				clocks = <&apb0>;
				clock-output-names = "apb0_pio", "apb0_ir",
						"apb0_timer", "apb0_p2wi",
						"apb0_uart", "apb0_1wire",
						"apb0_i2c";
			};

			ir_clk: ir_clk {
				#clock-cells = <0>;
				compatible = "allwinner,sun4i-a10-mod0-clk";
				clocks = <&rtc 0>, <&osc24M>;
				clock-output-names = "ir";
			};

			apb0_rst: apb0_rst {
				compatible = "allwinner,sun6i-a31-clock-reset";
				#reset-cells = <1>;
			};
		};

		cpucfg@1f01c00 {
			compatible = "allwinner,sun6i-a31-cpuconfig";
			reg = <0x01f01c00 0x300>;
		};

		ir: ir@1f02000 {
			compatible = "allwinner,sun6i-a31-ir";
			clocks = <&apb0_gates 1>, <&ir_clk>;
			clock-names = "apb", "ir";
			resets = <&apb0_rst 1>;
			interrupts = <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>;
			reg = <0x01f02000 0x40>;
			status = "disabled";
		};

		r_pio: pinctrl@1f02c00 {
			compatible = "allwinner,sun6i-a31-r-pinctrl";
			reg = <0x01f02c00 0x400>;
			interrupt-parent = <&r_intc>;
			interrupts = <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>,
				     <GIC_SPI 46 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&apb0_gates 0>, <&osc24M>, <&rtc 0>;
			clock-names = "apb", "hosc", "losc";
			resets = <&apb0_rst 0>;
			gpio-controller;
			interrupt-controller;
			#interrupt-cells = <3>;
			#gpio-cells = <3>;

			s_ir_rx_pin: s-ir-rx-pin {
				pins = "PL4";
				function = "s_ir";
			};

			s_p2wi_pins: s-p2wi-pins {
				pins = "PL0", "PL1";
				function = "s_p2wi";
			};
		};

		p2wi: i2c@1f03400 {
			compatible = "allwinner,sun6i-a31-p2wi";
			reg = <0x01f03400 0x400>;
			interrupts = <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>;
			clocks = <&apb0_gates 3>;
			clock-frequency = <100000>;
			resets = <&apb0_rst 3>;
			pinctrl-names = "default";
			pinctrl-0 = <&s_p2wi_pins>;
			status = "disabled";
			#address-cells = <1>;
			#size-cells = <0>;
		};
	};
};

Re: Colorly e708q1 and AXP20x support

[Horváth Csaba]

Hi,

Sorry, i was down with flu for a week.

Now i had time to play around, and tried the U-Boot method. While
successfully compiled it with the modified frequency and voltage, it
had no effect. I think no effect for the U-Boot itself (this latest
U-Boot doesn't have an option for cpu list command to display CPU info
at boot). Neither the booted OS.

"I guess this is your problem: you are trying to compile a custom kernel
with apparently a made-up config, which isn't easy."
I have used the Colorfly manual, so it's made-up, but also it's the
config what should work.

I tried with the sunxi-defconfig, but it does not boot (OK, in fact
is, but no display at all)

Will try the options you mentioned with mainline kernel soon :)

Thanks!

Cs.

On Sat, Nov 8, 2025 at 1:57 AM Andre Przywara <andre.przywara@arm.com> wrote:
>
> On Thu, 11 Sep 2025 21:29:36 +0200
> Horváth Csaba <horvathcsabalaszlo@gmail.com> wrote:
>
> > Hi,
> >
> > Thanks!
> > Strange, as i tried to compile mainline kernel half a year ago, but it
> > had no support neither to display or the power chip. I don't even know
> > what needs to be selected in the config in order to get them working.
>
> I guess this is your problem: you are trying to compile a custom kernel
> with apparently a made-up config, which isn't easy. As you figured, you
> might miss many things, so it's best to use a well-known config as a
> base, either sunxi_defconfig, multi_v7_defconfig, or probably the best:
> the config from a distro kernel. The latter typically have all
> drivers compiling as a module, so it would be able to load what it
> needs automatically.
>
> But for a first experiment sunxi_defconfig should be alright,
> especially for old SoCs, and compiles most things into the kernel, so
> you don't need to mess with modules. You might just run into issues
> with distros, though, as you might miss some (new) options there.
>
> Regarding cpufreq: that indeed requires a bunch of drivers to all work
> (for instance a thermal sensor: CONFIG_MFD_SUN4I_GPADC), so try
> sunxi_defconfig. To avoid running too hot quickly, you can lower the
> initial frequency in U-Boot (CONFIG_SYS_CLK_FREQ), also you might want
> to lower the initial voltage, for more power savings:
> CONFIG_AXP_DCDC3_VOLT. Try 720 MHz at 1.1V, or 480 MHz at 1V, to be on
> the safe side.
>
> If you get it booted with that, scan dmesg for PMIC messages, or check
> /sys/kernel/debug/regulator/regulator_summary. Messages about dummy
> supplies in dmesg are normal, when there are no port supplies in the
> DT, and are not fatal.
>
> In general, to find a driver for a certain device:
> $ git grep x-powers,axp221 drivers/
> ...
> drivers/mfd/axp20x-i2c.c:       { .compatible = "x-powers,axp221", .data = (void *)AXP221_ID },
> ...
> $ git grep axp20x-i2c.o drivers/mfd/Makefile
> drivers/mfd/Makefile:obj-$(CONFIG_MFD_AXP20X_I2C)       += axp20x-i2c.o
>                            ^^^^^^^^^^^^^^^^^^^^^
> Specifically the AXP uses several driver files, make sure you get all
> the options. Refer to dmesg and /sys/kernel/debug/devices_deferred to
> find missing drivers.
>
> Hope that helps for a first step, please come back with more specific
> information and questions, if needed.
>
> Cheers,
> Andre
>
> > (Tried to compile numerous displays in it, but did not help.)
> > Also, the AXP22x is referenced in the dts, and in the guide, there are
> > some lines to add to the U-Boot config, but nothing to the kernel. And
> > of course, does not work.
> >
> > So if anyone has any clue what to do (mostly what to compile in), i'll
> > be thankful - i have done some kernel compiling before, but not an
> > expert. Mostly not in devicetree objects. (It would be enough to have
> > a stock kernel and OS to boot, as the device will be only a character
> > display.)
> >
> > Thanks :)
> >
> > On Wed, Sep 10, 2025 at 6:33 PM Subair Mullappilly <msubair@hotmail.com> wrote:
> > >
> > > Hi
> > >
> > > A31 has already upstream support,
> > >
> > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/allwinner?h=v6.17-rc5
> > >
> > > your tablet device tree is already there, use upstream kernel, and it
> > > has support for display,
> > >
> > > i never used a31 chip, but used r40,a20 etc..
> > >
> > > Subair
> > >
> > > On 9/10/25 20:24, Horváth Csaba wrote:
> > > > Hi,
> > > >
> > > > I'm building a wireless display on a Colorfly e708q1 tablet. This is
> > > > an A31s device, supported by Linux-Sunxi.
> > > > I have managed to install Arch and get Wifi with an 5.x (stock)
> > > > kernel, because with newer kernels compiled according to the guide at
> > > > https://linux-sunxi.org/Colorfly_e708q1 i had no display.  Debian also
> > > > works, but the device overheats, or freezes because of other cause.
> > > >
> > > > With this kernel, the only problem is that the AXP20x power controller
> > > > is not working, therefore the device is very hot. I could not find any
> > > > information about how to get the AXP working. Basically i have no BAT
> > > > device, or any trace of working power management in the /dev or /sys.
> > > >
> > > > Can someone please guide me how to get this working...?
> > > >
> > > > Thanks in advance :)
> > > >
> > > > Cs.
> > > >
> >
>