[PATCH] ARM: dts: da850-evm: add clock properties to the nand node

[PATCH] ARM: dts: da850-evm: add clock properties to the nand node

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Make nand work with the common clock framework by specifying which
clock should be used and what name to look up.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 arch/arm/boot/dts/da850-evm.dts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/boot/dts/da850-evm.dts b/arch/arm/boot/dts/da850-evm.dts
index a86a8a1816f2..2602ad8e99ee 100644
--- a/arch/arm/boot/dts/da850-evm.dts
+++ b/arch/arm/boot/dts/da850-evm.dts
@@ -296,6 +296,9 @@
 			reg = <0 0x02000000 0x02000000
 			       1 0x00000000 0x00008000>;
 
+			clocks = <&psc0 3>;
+			clock-names = "aemif";
+
 			ti,davinci-chipselect = <1>;
 			ti,davinci-mask-ale = <0>;
 			ti,davinci-mask-cle = <0>;
-- 
2.16.1

Re: [PATCH] ARM: dts: da850-evm: add clock properties to the nand node

[Sekhar Nori]

On Monday 05 February 2018 09:22 PM, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
> 
> Make nand work with the common clock framework by specifying which
> clock should be used and what name to look up.
> 
> Signed-off-by: Bartosz Golaszewski <bgolaszewski-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
> ---
>  arch/arm/boot/dts/da850-evm.dts | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/da850-evm.dts b/arch/arm/boot/dts/da850-evm.dts
> index a86a8a1816f2..2602ad8e99ee 100644
> --- a/arch/arm/boot/dts/da850-evm.dts
> +++ b/arch/arm/boot/dts/da850-evm.dts
> @@ -296,6 +296,9 @@
>  			reg = <0 0x02000000 0x02000000
>  			       1 0x00000000 0x00008000>;
>  
> +			clocks = <&psc0 3>;
> +			clock-names = "aemif";

Looks like this is being added only to satisfy the devm_clk_get() call
in nand_davinci_probe() which I think is superfluous since we also
enable the same clock in aemif_probe().

Perhaps the better solution is to drip the clk code in
drivers/mtd/nand/davinci_nand.c and shift legacy code to start using
drivers/memory/aemif.c as well? This way we can also drop
arch/arm/mach-davinci/aemif.c

Thanks,
Sekhar
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Re: [PATCH] ARM: dts: da850-evm: add clock properties to the nand node

[Bartosz Golaszewski]

2018-02-06 12:07 GMT+01:00 Sekhar Nori <nsekhar-l0cyMroinI0@public.gmane.org>:
> On Monday 05 February 2018 09:22 PM, Bartosz Golaszewski wrote:
>> From: Bartosz Golaszewski <bgolaszewski-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
>>
>> Make nand work with the common clock framework by specifying which
>> clock should be used and what name to look up.
>>
>> Signed-off-by: Bartosz Golaszewski <bgolaszewski-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
>> ---
>>  arch/arm/boot/dts/da850-evm.dts | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/da850-evm.dts b/arch/arm/boot/dts/da850-evm.dts
>> index a86a8a1816f2..2602ad8e99ee 100644
>> --- a/arch/arm/boot/dts/da850-evm.dts
>> +++ b/arch/arm/boot/dts/da850-evm.dts
>> @@ -296,6 +296,9 @@
>>                       reg = <0 0x02000000 0x02000000
>>                              1 0x00000000 0x00008000>;
>>
>> +                     clocks = <&psc0 3>;
>> +                     clock-names = "aemif";
>
> Looks like this is being added only to satisfy the devm_clk_get() call
> in nand_davinci_probe() which I think is superfluous since we also
> enable the same clock in aemif_probe().
>
> Perhaps the better solution is to drip the clk code in
> drivers/mtd/nand/davinci_nand.c and shift legacy code to start using
> drivers/memory/aemif.c as well? This way we can also drop
> arch/arm/mach-davinci/aemif.c
>
> Thanks,
> Sekhar

Yes, this sounds good, but I think we should leave it for later as an
additional improvement, once everything else is in place. I think
these patches should be applied together with David's series in order
to not break the support on davinci boards and the aemif work would go
in later as a follow-up. How about that?

Also: I don't have any keystone board to test whether such changes
don't break the nand support there. Would you be able to test this?

Thanks,
Bartosz
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Re: [PATCH] ARM: dts: da850-evm: add clock properties to the nand node

[Sekhar Nori]

On Tuesday 06 February 2018 06:38 PM, Bartosz Golaszewski wrote:
> 2018-02-06 12:07 GMT+01:00 Sekhar Nori <nsekhar@ti.com>:
>> On Monday 05 February 2018 09:22 PM, Bartosz Golaszewski wrote:
>>> From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>>>
>>> Make nand work with the common clock framework by specifying which
>>> clock should be used and what name to look up.
>>>
>>> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>>> ---
>>>  arch/arm/boot/dts/da850-evm.dts | 3 +++
>>>  1 file changed, 3 insertions(+)
>>>
>>> diff --git a/arch/arm/boot/dts/da850-evm.dts b/arch/arm/boot/dts/da850-evm.dts
>>> index a86a8a1816f2..2602ad8e99ee 100644
>>> --- a/arch/arm/boot/dts/da850-evm.dts
>>> +++ b/arch/arm/boot/dts/da850-evm.dts
>>> @@ -296,6 +296,9 @@
>>>                       reg = <0 0x02000000 0x02000000
>>>                              1 0x00000000 0x00008000>;
>>>
>>> +                     clocks = <&psc0 3>;
>>> +                     clock-names = "aemif";
>>
>> Looks like this is being added only to satisfy the devm_clk_get() call
>> in nand_davinci_probe() which I think is superfluous since we also
>> enable the same clock in aemif_probe().
>>
>> Perhaps the better solution is to drip the clk code in
>> drivers/mtd/nand/davinci_nand.c and shift legacy code to start using
>> drivers/memory/aemif.c as well? This way we can also drop
>> arch/arm/mach-davinci/aemif.c
>>
>> Thanks,
>> Sekhar
> 
> Yes, this sounds good, but I think we should leave it for later as an
> additional improvement, once everything else is in place. I think
> these patches should be applied together with David's series in order
> to not break the support on davinci boards and the aemif work would go
> in later as a follow-up. How about that?

No, I dont think we should add temporary hacks to DT to work around
driver issues (I do think its a hack since the clock belongs to aemif
module not NAND flash).

An easier driver hack might be to not treat devm_clk_get() failure in
davinci_nand.c as catastrophic. It will safely fail in DT case and we
should get the clock in legacy boot case.

I think we are looking at a driver update dependency anyway.

> 
> Also: I don't have any keystone board to test whether such changes
> don't break the nand support there. Would you be able to test this?

Yes, I have access to those boards.

Thanks,
Sekhar

Re: [PATCH] ARM: dts: da850-evm: add clock properties to the nand node

[David Lechner]

On 02/06/2018 07:51 AM, Sekhar Nori wrote:
> On Tuesday 06 February 2018 06:38 PM, Bartosz Golaszewski wrote:
>> 2018-02-06 12:07 GMT+01:00 Sekhar Nori <nsekhar-l0cyMroinI0@public.gmane.org>:
>>> On Monday 05 February 2018 09:22 PM, Bartosz Golaszewski wrote:
>>>> From: Bartosz Golaszewski <bgolaszewski-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
>>>>
>>>> Make nand work with the common clock framework by specifying which
>>>> clock should be used and what name to look up.
>>>>
>>>> Signed-off-by: Bartosz Golaszewski <bgolaszewski-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
>>>> ---
>>>>   arch/arm/boot/dts/da850-evm.dts | 3 +++
>>>>   1 file changed, 3 insertions(+)
>>>>
>>>> diff --git a/arch/arm/boot/dts/da850-evm.dts b/arch/arm/boot/dts/da850-evm.dts
>>>> index a86a8a1816f2..2602ad8e99ee 100644
>>>> --- a/arch/arm/boot/dts/da850-evm.dts
>>>> +++ b/arch/arm/boot/dts/da850-evm.dts
>>>> @@ -296,6 +296,9 @@
>>>>                        reg = <0 0x02000000 0x02000000
>>>>                               1 0x00000000 0x00008000>;
>>>>
>>>> +                     clocks = <&psc0 3>;
>>>> +                     clock-names = "aemif";
>>>
>>> Looks like this is being added only to satisfy the devm_clk_get() call
>>> in nand_davinci_probe() which I think is superfluous since we also
>>> enable the same clock in aemif_probe().
>>>
>>> Perhaps the better solution is to drip the clk code in
>>> drivers/mtd/nand/davinci_nand.c and shift legacy code to start using
>>> drivers/memory/aemif.c as well? This way we can also drop
>>> arch/arm/mach-davinci/aemif.c
>>>
>>> Thanks,
>>> Sekhar
>>
>> Yes, this sounds good, but I think we should leave it for later as an
>> additional improvement, once everything else is in place. I think
>> these patches should be applied together with David's series in order
>> to not break the support on davinci boards and the aemif work would go
>> in later as a follow-up. How about that?
> 
> No, I dont think we should add temporary hacks to DT to work around
> driver issues (I do think its a hack since the clock belongs to aemif
> module not NAND flash).
> 
> An easier driver hack might be to not treat devm_clk_get() failure in
> davinci_nand.c as catastrophic. It will safely fail in DT case and we
> should get the clock in legacy boot case.
> 
> I think we are looking at a driver update dependency anyway.

It looks like keystone.dtsi is using the clock-ranges property in the
aemif node to pass the clock to child nodes. Could we not do the same
in da850.dtsi?

> 
>>
>> Also: I don't have any keystone board to test whether such changes
>> don't break the nand support there. Would you be able to test this?
> 
> Yes, I have access to those boards.
> 
> Thanks,
> Sekhar
> 

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Re: [PATCH] ARM: dts: da850-evm: add clock properties to the nand node

[David Lechner]

On 02/06/2018 12:16 PM, David Lechner wrote:
> On 02/06/2018 07:51 AM, Sekhar Nori wrote:
>> On Tuesday 06 February 2018 06:38 PM, Bartosz Golaszewski wrote:
>>> 2018-02-06 12:07 GMT+01:00 Sekhar Nori <nsekhar-l0cyMroinI0@public.gmane.org>:
>>>> On Monday 05 February 2018 09:22 PM, Bartosz Golaszewski wrote:
>>>>> From: Bartosz Golaszewski <bgolaszewski-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
>>>>>
>>>>> Make nand work with the common clock framework by specifying which
>>>>> clock should be used and what name to look up.
>>>>>
>>>>> Signed-off-by: Bartosz Golaszewski <bgolaszewski-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
>>>>> ---
>>>>>   arch/arm/boot/dts/da850-evm.dts | 3 +++
>>>>>   1 file changed, 3 insertions(+)
>>>>>
>>>>> diff --git a/arch/arm/boot/dts/da850-evm.dts b/arch/arm/boot/dts/da850-evm.dts
>>>>> index a86a8a1816f2..2602ad8e99ee 100644
>>>>> --- a/arch/arm/boot/dts/da850-evm.dts
>>>>> +++ b/arch/arm/boot/dts/da850-evm.dts
>>>>> @@ -296,6 +296,9 @@
>>>>>                        reg = <0 0x02000000 0x02000000
>>>>>                               1 0x00000000 0x00008000>;
>>>>>
>>>>> +                     clocks = <&psc0 3>;
>>>>> +                     clock-names = "aemif";
>>>>
>>>> Looks like this is being added only to satisfy the devm_clk_get() call
>>>> in nand_davinci_probe() which I think is superfluous since we also
>>>> enable the same clock in aemif_probe().
>>>>
>>>> Perhaps the better solution is to drip the clk code in
>>>> drivers/mtd/nand/davinci_nand.c and shift legacy code to start using
>>>> drivers/memory/aemif.c as well? This way we can also drop
>>>> arch/arm/mach-davinci/aemif.c
>>>>
>>>> Thanks,
>>>> Sekhar
>>>
>>> Yes, this sounds good, but I think we should leave it for later as an
>>> additional improvement, once everything else is in place. I think
>>> these patches should be applied together with David's series in order
>>> to not break the support on davinci boards and the aemif work would go
>>> in later as a follow-up. How about that?
>>
>> No, I dont think we should add temporary hacks to DT to work around
>> driver issues (I do think its a hack since the clock belongs to aemif
>> module not NAND flash).
>>
>> An easier driver hack might be to not treat devm_clk_get() failure in
>> davinci_nand.c as catastrophic. It will safely fail in DT case and we
>> should get the clock in legacy boot case.
>>
>> I think we are looking at a driver update dependency anyway.
> 
> It looks like keystone.dtsi is using the clock-ranges property in the
> aemif node to pass the clock to child nodes. Could we not do the same
> in da850.dtsi?

Bartosz, please try this instead of your patch.

FYI, this is just following the existing memory-controllers/ti-aemif.txt
device tree bindings, so not a "hack".

---
diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
index 3a1f2ce..ff9d807 100644
--- a/arch/arm/boot/dts/da850.dtsi
+++ b/arch/arm/boot/dts/da850.dtsi
@@ -796,6 +796,8 @@
  		ranges = <0 0 0x60000000 0x08000000
  			  1 0 0x68000000 0x00008000>;
  		clocks = <&psc0 3>;
+		clock-names = "aemif";
+		clock-ranges;
  		status = "disabled";
  	};
  	memctrl: memory-controller@b0000000 {
---
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Re: [PATCH] ARM: dts: da850-evm: add clock properties to the nand node

[Bartosz Golaszewski]

2018-02-06 19:25 GMT+01:00 David Lechner <david-nq/r/kbU++upp/zk7JDF2g@public.gmane.org>:
> On 02/06/2018 12:16 PM, David Lechner wrote:
>>
>> On 02/06/2018 07:51 AM, Sekhar Nori wrote:
>>>
>>> On Tuesday 06 February 2018 06:38 PM, Bartosz Golaszewski wrote:
>>>>
>>>> 2018-02-06 12:07 GMT+01:00 Sekhar Nori <nsekhar-l0cyMroinI0@public.gmane.org>:
>>>>>
>>>>> On Monday 05 February 2018 09:22 PM, Bartosz Golaszewski wrote:
>>>>>>
>>>>>> From: Bartosz Golaszewski <bgolaszewski-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
>>>>>>
>>>>>> Make nand work with the common clock framework by specifying which
>>>>>> clock should be used and what name to look up.
>>>>>>
>>>>>> Signed-off-by: Bartosz Golaszewski <bgolaszewski-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
>>>>>> ---
>>>>>>   arch/arm/boot/dts/da850-evm.dts | 3 +++
>>>>>>   1 file changed, 3 insertions(+)
>>>>>>
>>>>>> diff --git a/arch/arm/boot/dts/da850-evm.dts
>>>>>> b/arch/arm/boot/dts/da850-evm.dts
>>>>>> index a86a8a1816f2..2602ad8e99ee 100644
>>>>>> --- a/arch/arm/boot/dts/da850-evm.dts
>>>>>> +++ b/arch/arm/boot/dts/da850-evm.dts
>>>>>> @@ -296,6 +296,9 @@
>>>>>>                        reg = <0 0x02000000 0x02000000
>>>>>>                               1 0x00000000 0x00008000>;
>>>>>>
>>>>>> +                     clocks = <&psc0 3>;
>>>>>> +                     clock-names = "aemif";
>>>>>
>>>>>
>>>>> Looks like this is being added only to satisfy the devm_clk_get() call
>>>>> in nand_davinci_probe() which I think is superfluous since we also
>>>>> enable the same clock in aemif_probe().
>>>>>
>>>>> Perhaps the better solution is to drip the clk code in
>>>>> drivers/mtd/nand/davinci_nand.c and shift legacy code to start using
>>>>> drivers/memory/aemif.c as well? This way we can also drop
>>>>> arch/arm/mach-davinci/aemif.c
>>>>>
>>>>> Thanks,
>>>>> Sekhar
>>>>
>>>>
>>>> Yes, this sounds good, but I think we should leave it for later as an
>>>> additional improvement, once everything else is in place. I think
>>>> these patches should be applied together with David's series in order
>>>> to not break the support on davinci boards and the aemif work would go
>>>> in later as a follow-up. How about that?
>>>
>>>
>>> No, I dont think we should add temporary hacks to DT to work around
>>> driver issues (I do think its a hack since the clock belongs to aemif
>>> module not NAND flash).
>>>
>>> An easier driver hack might be to not treat devm_clk_get() failure in
>>> davinci_nand.c as catastrophic. It will safely fail in DT case and we
>>> should get the clock in legacy boot case.
>>>
>>> I think we are looking at a driver update dependency anyway.
>>
>>
>> It looks like keystone.dtsi is using the clock-ranges property in the
>> aemif node to pass the clock to child nodes. Could we not do the same
>> in da850.dtsi?
>
>
> Bartosz, please try this instead of your patch.
>
> FYI, this is just following the existing memory-controllers/ti-aemif.txt
> device tree bindings, so not a "hack".
>
> ---
> diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
> index 3a1f2ce..ff9d807 100644
> --- a/arch/arm/boot/dts/da850.dtsi
> +++ b/arch/arm/boot/dts/da850.dtsi
> @@ -796,6 +796,8 @@
>                 ranges = <0 0 0x60000000 0x08000000
>                           1 0 0x68000000 0x00008000>;
>                 clocks = <&psc0 3>;
> +               clock-names = "aemif";
> +               clock-ranges;
>                 status = "disabled";
>         };
>         memctrl: memory-controller@b0000000 {
> ---

Yes, this works. Sekhar: can we include it in David's series, while
still keeping the plan to move legacy boards to using the aemif
driver?

Best regards,
Bartosz
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Re: [PATCH] ARM: dts: da850-evm: add clock properties to the nand node

[Sekhar Nori]

On Wednesday 07 February 2018 12:15 AM, Bartosz Golaszewski wrote:
> 2018-02-06 19:25 GMT+01:00 David Lechner <david@lechnology.com>:
>> On 02/06/2018 12:16 PM, David Lechner wrote:
>>>
>>> On 02/06/2018 07:51 AM, Sekhar Nori wrote:
>>>>
>>>> On Tuesday 06 February 2018 06:38 PM, Bartosz Golaszewski wrote:
>>>>>
>>>>> 2018-02-06 12:07 GMT+01:00 Sekhar Nori <nsekhar@ti.com>:
>>>>>>
>>>>>> On Monday 05 February 2018 09:22 PM, Bartosz Golaszewski wrote:
>>>>>>>
>>>>>>> From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>>>>>>>
>>>>>>> Make nand work with the common clock framework by specifying which
>>>>>>> clock should be used and what name to look up.
>>>>>>>
>>>>>>> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>>>>>>> ---
>>>>>>>   arch/arm/boot/dts/da850-evm.dts | 3 +++
>>>>>>>   1 file changed, 3 insertions(+)
>>>>>>>
>>>>>>> diff --git a/arch/arm/boot/dts/da850-evm.dts
>>>>>>> b/arch/arm/boot/dts/da850-evm.dts
>>>>>>> index a86a8a1816f2..2602ad8e99ee 100644
>>>>>>> --- a/arch/arm/boot/dts/da850-evm.dts
>>>>>>> +++ b/arch/arm/boot/dts/da850-evm.dts
>>>>>>> @@ -296,6 +296,9 @@
>>>>>>>                        reg = <0 0x02000000 0x02000000
>>>>>>>                               1 0x00000000 0x00008000>;
>>>>>>>
>>>>>>> +                     clocks = <&psc0 3>;
>>>>>>> +                     clock-names = "aemif";
>>>>>>
>>>>>>
>>>>>> Looks like this is being added only to satisfy the devm_clk_get() call
>>>>>> in nand_davinci_probe() which I think is superfluous since we also
>>>>>> enable the same clock in aemif_probe().
>>>>>>
>>>>>> Perhaps the better solution is to drip the clk code in
>>>>>> drivers/mtd/nand/davinci_nand.c and shift legacy code to start using
>>>>>> drivers/memory/aemif.c as well? This way we can also drop
>>>>>> arch/arm/mach-davinci/aemif.c
>>>>>>
>>>>>> Thanks,
>>>>>> Sekhar
>>>>>
>>>>>
>>>>> Yes, this sounds good, but I think we should leave it for later as an
>>>>> additional improvement, once everything else is in place. I think
>>>>> these patches should be applied together with David's series in order
>>>>> to not break the support on davinci boards and the aemif work would go
>>>>> in later as a follow-up. How about that?
>>>>
>>>>
>>>> No, I dont think we should add temporary hacks to DT to work around
>>>> driver issues (I do think its a hack since the clock belongs to aemif
>>>> module not NAND flash).
>>>>
>>>> An easier driver hack might be to not treat devm_clk_get() failure in
>>>> davinci_nand.c as catastrophic. It will safely fail in DT case and we
>>>> should get the clock in legacy boot case.
>>>>
>>>> I think we are looking at a driver update dependency anyway.
>>>
>>>
>>> It looks like keystone.dtsi is using the clock-ranges property in the
>>> aemif node to pass the clock to child nodes. Could we not do the same
>>> in da850.dtsi?
>>
>>
>> Bartosz, please try this instead of your patch.
>>
>> FYI, this is just following the existing memory-controllers/ti-aemif.txt
>> device tree bindings, so not a "hack".
>>
>> ---
>> diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
>> index 3a1f2ce..ff9d807 100644
>> --- a/arch/arm/boot/dts/da850.dtsi
>> +++ b/arch/arm/boot/dts/da850.dtsi
>> @@ -796,6 +796,8 @@
>>                 ranges = <0 0 0x60000000 0x08000000
>>                           1 0 0x68000000 0x00008000>;
>>                 clocks = <&psc0 3>;
>> +               clock-names = "aemif";
>> +               clock-ranges;
>>                 status = "disabled";
>>         };
>>         memctrl: memory-controller@b0000000 {
>> ---
> 
> Yes, this works. Sekhar: can we include it in David's series, while
> still keeping the plan to move legacy boards to using the aemif
> driver?

Okay. Fine with me. Actually the chipselect node already has
clock-ranges defined, but that doesn't have any meaning unless its also
included in aemif node.

Thanks,
Sekhar

Re: [PATCH] ARM: dts: da850-evm: add clock properties to the nand node

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 1078 bytes --]

Hi Bartosz,

I love your patch! Yet something to improve:

[auto build test ERROR on robh/for-next]
[also build test ERROR on v4.15 next-20180209]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Bartosz-Golaszewski/ARM-dts-da850-evm-add-clock-properties-to-the-nand-node/20180208-105626
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: arm-sunxi_defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm 

All errors (new ones prefixed by >>):

>> ERROR: Input tree has errors, aborting (use -f to force output)

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0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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