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[PATCH 0/4] Add DT support for NAND to LCDK

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  [PATCH 0/4] Add DT support for NAND to LCDK Karl Beldan <kbeldan@baylibre.com> - 2016-08-09 19:20 +0200
    [PATCH 2/4] ARM: dts: da850: Add an aemif node Karl Beldan <kbeldan@baylibre.com> - 2016-08-09 19:20 +0200
      Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node Sekhar Nori <nsekhar@ti.com> - 2016-08-10 20:30 +0200
        Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node Karl Beldan <kbeldan@baylibre.com> - 2016-08-10 20:40 +0200
        Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node Karl Beldan <kbeldan@baylibre.com> - 2016-08-10 21:40 +0200
        Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node Karl Beldan <kbeldan@baylibre.com> - 2016-08-10 22:00 +0200
          Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node Sekhar Nori <nsekhar@ti.com> - 2016-08-10 22:40 +0200
      Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node Sekhar Nori <nsekhar@ti.com> - 2016-08-10 20:50 +0200
        Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node Sekhar Nori <nsekhar@ti.com> - 2016-08-10 21:00 +0200
          Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node Karl Beldan <kbeldan@baylibre.com> - 2016-08-10 21:10 +0200
            Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node Karl Beldan <kbeldan@baylibre.com> - 2016-08-10 22:10 +0200
            Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node Sekhar Nori <nsekhar@ti.com> - 2016-08-10 22:20 +0200
        Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node Karl Beldan <kbeldan@baylibre.com> - 2016-08-10 21:20 +0200

#1459005 — [PATCH 0/4] Add DT support for NAND to LCDK

Hi,

This does not use the same way the current da8xx boards do, instead
it is using the more generic and DT friendly memory driver ti-aemif.
I can do the same for the da850-evm and retire the dts nandcs3 instances.

Karl Beldan (4):
  memory: ti-aemif: Get a named clock rather than an unnamed one
  ARM: dts: da850: Add an aemif node
  ARM: dts: da850-lcdk: Add NAND to DT
  ARM: davinci_all_defconfig: Enable AEMIF as a module

 arch/arm/boot/dts/da850-lcdk.dts       | 108 +++++++++++++++++++++++++++++++++
 arch/arm/boot/dts/da850.dtsi           |  10 +++
 arch/arm/configs/davinci_all_defconfig |   2 +
 drivers/memory/ti-aemif.c              |   2 +-
 4 files changed, 121 insertions(+), 1 deletion(-)

-- 
2.9.2

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#1459006 — [PATCH 2/4] ARM: dts: da850: Add an aemif node

Currently the davinci da8xx boards use the mach-davinci aemif code.
Instantiating an aemif node into the DT allows to use the ti-aemif
memory driver and is another step to better DT support.
Also it will allow to properly pass the emif timings via DT.

Signed-off-by: Karl Beldan <kbeldan@baylibre.com>
---
 arch/arm/boot/dts/da850.dtsi | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
index bc10e7e..f62928c 100644
--- a/arch/arm/boot/dts/da850.dtsi
+++ b/arch/arm/boot/dts/da850.dtsi
@@ -411,6 +411,16 @@
 			dma-names = "tx", "rx";
 		};
 	};
+	aemif: aemif@68000000 {
+		compatible = "ti,da850-aemif";
+		#address-cells = <2>;
+		#size-cells = <1>;
+
+		reg = <0x68000000 0x00008000>;
+		ranges = <0 0 0x60000000 0x08000000
+			  1 0 0x68000000 0x00008000>;
+		status = "disabled";
+	};
 	nand_cs3@62000000 {
 		compatible = "ti,davinci-nand";
 		reg = <0x62000000 0x807ff
-- 
2.9.2

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#1459419 — Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node

On Wednesday 10 August 2016 01:56 PM, Karl Beldan wrote:
> On Wed, Aug 10, 2016 at 01:42:01PM +0530, Sekhar Nori wrote:
>> On Wednesday 10 August 2016 01:37 PM, Karl Beldan wrote:
>>> On Wed, Aug 10, 2016 at 01:32:03PM +0530, Sekhar Nori wrote:
>>>> On Wednesday 10 August 2016 01:18 PM, Sekhar Nori wrote:
>>>>> On Tuesday 09 August 2016 10:45 PM, Karl Beldan wrote:
>>>>>> Currently the davinci da8xx boards use the mach-davinci aemif code.
>>>>>> Instantiating an aemif node into the DT allows to use the ti-aemif
>>>>>> memory driver and is another step to better DT support.
>>>>>> Also it will allow to properly pass the emif timings via DT.
>>>>>>
>>>>>> Signed-off-by: Karl Beldan <kbeldan@baylibre.com>
>>>>>> ---
>>>>>>  arch/arm/boot/dts/da850.dtsi | 10 ++++++++++
>>>>>>  1 file changed, 10 insertions(+)
>>>>>>
>>>>>> diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
>>>>>> index bc10e7e..f62928c 100644
>>>>>> --- a/arch/arm/boot/dts/da850.dtsi
>>>>>> +++ b/arch/arm/boot/dts/da850.dtsi
>>>>>> @@ -411,6 +411,16 @@
>>>>>>  			dma-names = "tx", "rx";
>>>>>>  		};
>>>>>>  	};
>>>>>> +	aemif: aemif@68000000 {
>>>>>> +		compatible = "ti,da850-aemif";
>>>>>> +		#address-cells = <2>;
>>>>>> +		#size-cells = <1>;
>>>>>> +
>>>>>> +		reg = <0x68000000 0x00008000>;
>>>>>> +		ranges = <0 0 0x60000000 0x08000000
>>>>>> +			  1 0 0x68000000 0x00008000>;
>>>>>> +		status = "disabled";
>>>>>> +	};
>>>>>>  	nand_cs3@62000000 {
>>>>>>  		compatible = "ti,davinci-nand";
>>>>>>  		reg = <0x62000000 0x807ff
>>>>>
>>>>> The nand node should be part of aemif node like it is done for keystone
>>>>> boards.
>>>>
>>>> Actually, can you move the nand node out of da850.dtsi completely. Its
>>>> much better to keep da850.dtsi restricted to soc-internal devices and
>>>> keep the board level devices like NAND flash in <board>.dts file.
>>>>
>>>> Similarly, can you move the NAND pinmux definitions too to the
>>>> da850-evm.dts file?
>>>>
>>>> There is advantage in keeping common pinmux definitions in da850.dtsi so
>>>> each board doe not have to repeat them. But AEMIF is an exception as its
>>>> usage can really be varied (NAND, NOR, SRAM, other). Plus, different
>>>> boards are likely to use different chip selects so coming up with some
>>>> pinmux definitions which will be reused widely is really unlikely.
>>>>
>>> This is exactly what I just did for the LCDK.
>>> If everybody is happy with it I will do the same for the evm as I put it
>>> in the cover letter.
>>
>> Yes please. We dont want duplication of data between da850.dtsi and
>> da850-lcdk.dts files.
>>
> Then I'll wait for this series to be applied and then apply my changes
> to the EVM while retiring the nand_cs3 together.

No, I prefer the fixup happens first. In the same series, you can first
fixup existing EVM and then add LCDK support.

Regards,
Sekhar

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#1459489 — Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node

On Wed, Aug 10, 2016 at 09:28:48AM +0000, Karl Beldan wrote:
> On Wed, Aug 10, 2016 at 02:04:48PM +0530, Sekhar Nori wrote:
> > On Wednesday 10 August 2016 02:04 PM, Karl Beldan wrote:
> > > On Wed, Aug 10, 2016 at 01:59:26PM +0530, Sekhar Nori wrote:
> > >> On Wednesday 10 August 2016 01:56 PM, Karl Beldan wrote:
> > >>> On Wed, Aug 10, 2016 at 01:42:01PM +0530, Sekhar Nori wrote:
> > >>>> On Wednesday 10 August 2016 01:37 PM, Karl Beldan wrote:
> > >>>>> On Wed, Aug 10, 2016 at 01:32:03PM +0530, Sekhar Nori wrote:
> > >>>>>> On Wednesday 10 August 2016 01:18 PM, Sekhar Nori wrote:
> > >>>>>>> On Tuesday 09 August 2016 10:45 PM, Karl Beldan wrote:
> > >>>>>>>> Currently the davinci da8xx boards use the mach-davinci aemif code.
> > >>>>>>>> Instantiating an aemif node into the DT allows to use the ti-aemif
> > >>>>>>>> memory driver and is another step to better DT support.
> > >>>>>>>> Also it will allow to properly pass the emif timings via DT.
> > >>>>>>>>
> > >>>>>>>> Signed-off-by: Karl Beldan <kbeldan@baylibre.com>
> > >>>>>>>> ---
> > >>>>>>>>  arch/arm/boot/dts/da850.dtsi | 10 ++++++++++
> > >>>>>>>>  1 file changed, 10 insertions(+)
> > >>>>>>>>
> > >>>>>>>> diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
> > >>>>>>>> index bc10e7e..f62928c 100644
> > >>>>>>>> --- a/arch/arm/boot/dts/da850.dtsi
> > >>>>>>>> +++ b/arch/arm/boot/dts/da850.dtsi
> > >>>>>>>> @@ -411,6 +411,16 @@
> > >>>>>>>>  			dma-names = "tx", "rx";
> > >>>>>>>>  		};
> > >>>>>>>>  	};
> > >>>>>>>> +	aemif: aemif@68000000 {
> > >>>>>>>> +		compatible = "ti,da850-aemif";
> > >>>>>>>> +		#address-cells = <2>;
> > >>>>>>>> +		#size-cells = <1>;
> > >>>>>>>> +
> > >>>>>>>> +		reg = <0x68000000 0x00008000>;
> > >>>>>>>> +		ranges = <0 0 0x60000000 0x08000000
> > >>>>>>>> +			  1 0 0x68000000 0x00008000>;
> > >>>>>>>> +		status = "disabled";
> > >>>>>>>> +	};
> > >>>>>>>>  	nand_cs3@62000000 {
> > >>>>>>>>  		compatible = "ti,davinci-nand";
> > >>>>>>>>  		reg = <0x62000000 0x807ff
> > >>>>>>>
> > >>>>>>> The nand node should be part of aemif node like it is done for keystone
> > >>>>>>> boards.
> > >>>>>>
> > >>>>>> Actually, can you move the nand node out of da850.dtsi completely. Its
> > >>>>>> much better to keep da850.dtsi restricted to soc-internal devices and
> > >>>>>> keep the board level devices like NAND flash in <board>.dts file.
> > >>>>>>
> > >>>>>> Similarly, can you move the NAND pinmux definitions too to the
> > >>>>>> da850-evm.dts file?
> > >>>>>>
> > >>>>>> There is advantage in keeping common pinmux definitions in da850.dtsi so
> > >>>>>> each board doe not have to repeat them. But AEMIF is an exception as its
> > >>>>>> usage can really be varied (NAND, NOR, SRAM, other). Plus, different
> > >>>>>> boards are likely to use different chip selects so coming up with some
> > >>>>>> pinmux definitions which will be reused widely is really unlikely.
> > >>>>>>
> > >>>>> This is exactly what I just did for the LCDK.
> > >>>>> If everybody is happy with it I will do the same for the evm as I put it
> > >>>>> in the cover letter.
> > >>>>
> > >>>> Yes please. We dont want duplication of data between da850.dtsi and
> > >>>> da850-lcdk.dts files.
> > >>>>
> > >>> Then I'll wait for this series to be applied and then apply my changes
> > >>> to the EVM while retiring the nand_cs3 together.
> > >>
> > >> No, I prefer the fixup happens first. In the same series, you can first
> > >> fixup existing EVM and then add LCDK support.
> > >>
> > > 
> > > Well in that case you'll have to do the testing since I only have an
> > > LCDK. I should be able to send the series within the hour.
> > 
> > Sure. I can test it.
> > 
> The aemif/davinci_nand drivers don't configure AWCCR, yet davinci_nand
> relies on EM_WAIT for RDY/nBUSY, so for the moment I keep the default
> settings, but I configure the EM_WAIT pins in the pinctrl. I did it for
> the LCDK, and it is not done for the EVM. Since the EVM schematics are
> not public can you tell which EM_WAIT pins are connected ?
>  
Also the device name is nand_cs3 but the pin muxing also enables CS4
both in Linux and U-Boot, can you tell whether it is needed ?
Or maybe you can share the schematics and I'll check it myself ?
 
Karl

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#1459681 — Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node

On Wed, Aug 10, 2016 at 02:04:48PM +0530, Sekhar Nori wrote:
> On Wednesday 10 August 2016 02:04 PM, Karl Beldan wrote:
> > On Wed, Aug 10, 2016 at 01:59:26PM +0530, Sekhar Nori wrote:
> >> On Wednesday 10 August 2016 01:56 PM, Karl Beldan wrote:
> >>> On Wed, Aug 10, 2016 at 01:42:01PM +0530, Sekhar Nori wrote:
> >>>> On Wednesday 10 August 2016 01:37 PM, Karl Beldan wrote:
> >>>>> On Wed, Aug 10, 2016 at 01:32:03PM +0530, Sekhar Nori wrote:
> >>>>>> On Wednesday 10 August 2016 01:18 PM, Sekhar Nori wrote:
> >>>>>>> On Tuesday 09 August 2016 10:45 PM, Karl Beldan wrote:
> >>>>>>>> Currently the davinci da8xx boards use the mach-davinci aemif code.
> >>>>>>>> Instantiating an aemif node into the DT allows to use the ti-aemif
> >>>>>>>> memory driver and is another step to better DT support.
> >>>>>>>> Also it will allow to properly pass the emif timings via DT.
> >>>>>>>>
> >>>>>>>> Signed-off-by: Karl Beldan <kbeldan@baylibre.com>
> >>>>>>>> ---
> >>>>>>>>  arch/arm/boot/dts/da850.dtsi | 10 ++++++++++
> >>>>>>>>  1 file changed, 10 insertions(+)
> >>>>>>>>
> >>>>>>>> diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
> >>>>>>>> index bc10e7e..f62928c 100644
> >>>>>>>> --- a/arch/arm/boot/dts/da850.dtsi
> >>>>>>>> +++ b/arch/arm/boot/dts/da850.dtsi
> >>>>>>>> @@ -411,6 +411,16 @@
> >>>>>>>>  			dma-names = "tx", "rx";
> >>>>>>>>  		};
> >>>>>>>>  	};
> >>>>>>>> +	aemif: aemif@68000000 {
> >>>>>>>> +		compatible = "ti,da850-aemif";
> >>>>>>>> +		#address-cells = <2>;
> >>>>>>>> +		#size-cells = <1>;
> >>>>>>>> +
> >>>>>>>> +		reg = <0x68000000 0x00008000>;
> >>>>>>>> +		ranges = <0 0 0x60000000 0x08000000
> >>>>>>>> +			  1 0 0x68000000 0x00008000>;
> >>>>>>>> +		status = "disabled";
> >>>>>>>> +	};
> >>>>>>>>  	nand_cs3@62000000 {
> >>>>>>>>  		compatible = "ti,davinci-nand";
> >>>>>>>>  		reg = <0x62000000 0x807ff
> >>>>>>>
> >>>>>>> The nand node should be part of aemif node like it is done for keystone
> >>>>>>> boards.
> >>>>>>
> >>>>>> Actually, can you move the nand node out of da850.dtsi completely. Its
> >>>>>> much better to keep da850.dtsi restricted to soc-internal devices and
> >>>>>> keep the board level devices like NAND flash in <board>.dts file.
> >>>>>>
> >>>>>> Similarly, can you move the NAND pinmux definitions too to the
> >>>>>> da850-evm.dts file?
> >>>>>>
> >>>>>> There is advantage in keeping common pinmux definitions in da850.dtsi so
> >>>>>> each board doe not have to repeat them. But AEMIF is an exception as its
> >>>>>> usage can really be varied (NAND, NOR, SRAM, other). Plus, different
> >>>>>> boards are likely to use different chip selects so coming up with some
> >>>>>> pinmux definitions which will be reused widely is really unlikely.
> >>>>>>
> >>>>> This is exactly what I just did for the LCDK.
> >>>>> If everybody is happy with it I will do the same for the evm as I put it
> >>>>> in the cover letter.
> >>>>
> >>>> Yes please. We dont want duplication of data between da850.dtsi and
> >>>> da850-lcdk.dts files.
> >>>>
> >>> Then I'll wait for this series to be applied and then apply my changes
> >>> to the EVM while retiring the nand_cs3 together.
> >>
> >> No, I prefer the fixup happens first. In the same series, you can first
> >> fixup existing EVM and then add LCDK support.
> >>
> > 
> > Well in that case you'll have to do the testing since I only have an
> > LCDK. I should be able to send the series within the hour.
> 
> Sure. I can test it.
> 
The aemif/davinci_nand drivers don't configure AWCCR, yet davinci_nand
relies on EM_WAIT for RDY/nBUSY, so for the moment I keep the default
settings, but I configure the EM_WAIT pins in the pinctrl. I did it for
the LCDK, and it is not done for the EVM. Since the EVM schematics are
not public can you tell which EM_WAIT pins are connected ?
 
Karl

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#1459745 — Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node

On Wed, Aug 10, 2016 at 01:59:26PM +0530, Sekhar Nori wrote:
> On Wednesday 10 August 2016 01:56 PM, Karl Beldan wrote:
> > On Wed, Aug 10, 2016 at 01:42:01PM +0530, Sekhar Nori wrote:
> >> On Wednesday 10 August 2016 01:37 PM, Karl Beldan wrote:
> >>> On Wed, Aug 10, 2016 at 01:32:03PM +0530, Sekhar Nori wrote:
> >>>> On Wednesday 10 August 2016 01:18 PM, Sekhar Nori wrote:
> >>>>> On Tuesday 09 August 2016 10:45 PM, Karl Beldan wrote:
> >>>>>> Currently the davinci da8xx boards use the mach-davinci aemif code.
> >>>>>> Instantiating an aemif node into the DT allows to use the ti-aemif
> >>>>>> memory driver and is another step to better DT support.
> >>>>>> Also it will allow to properly pass the emif timings via DT.
> >>>>>>
> >>>>>> Signed-off-by: Karl Beldan <kbeldan@baylibre.com>
> >>>>>> ---
> >>>>>>  arch/arm/boot/dts/da850.dtsi | 10 ++++++++++
> >>>>>>  1 file changed, 10 insertions(+)
> >>>>>>
> >>>>>> diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
> >>>>>> index bc10e7e..f62928c 100644
> >>>>>> --- a/arch/arm/boot/dts/da850.dtsi
> >>>>>> +++ b/arch/arm/boot/dts/da850.dtsi
> >>>>>> @@ -411,6 +411,16 @@
> >>>>>>  			dma-names = "tx", "rx";
> >>>>>>  		};
> >>>>>>  	};
> >>>>>> +	aemif: aemif@68000000 {
> >>>>>> +		compatible = "ti,da850-aemif";
> >>>>>> +		#address-cells = <2>;
> >>>>>> +		#size-cells = <1>;
> >>>>>> +
> >>>>>> +		reg = <0x68000000 0x00008000>;
> >>>>>> +		ranges = <0 0 0x60000000 0x08000000
> >>>>>> +			  1 0 0x68000000 0x00008000>;
> >>>>>> +		status = "disabled";
> >>>>>> +	};
> >>>>>>  	nand_cs3@62000000 {
> >>>>>>  		compatible = "ti,davinci-nand";
> >>>>>>  		reg = <0x62000000 0x807ff
> >>>>>
> >>>>> The nand node should be part of aemif node like it is done for keystone
> >>>>> boards.
> >>>>
> >>>> Actually, can you move the nand node out of da850.dtsi completely. Its
> >>>> much better to keep da850.dtsi restricted to soc-internal devices and
> >>>> keep the board level devices like NAND flash in <board>.dts file.
> >>>>
> >>>> Similarly, can you move the NAND pinmux definitions too to the
> >>>> da850-evm.dts file?
> >>>>
> >>>> There is advantage in keeping common pinmux definitions in da850.dtsi so
> >>>> each board doe not have to repeat them. But AEMIF is an exception as its
> >>>> usage can really be varied (NAND, NOR, SRAM, other). Plus, different
> >>>> boards are likely to use different chip selects so coming up with some
> >>>> pinmux definitions which will be reused widely is really unlikely.
> >>>>
> >>> This is exactly what I just did for the LCDK.
> >>> If everybody is happy with it I will do the same for the evm as I put it
> >>> in the cover letter.
> >>
> >> Yes please. We dont want duplication of data between da850.dtsi and
> >> da850-lcdk.dts files.
> >>
> > Then I'll wait for this series to be applied and then apply my changes
> > to the EVM while retiring the nand_cs3 together.
> 
> No, I prefer the fixup happens first. In the same series, you can first
> fixup existing EVM and then add LCDK support.
> 

Well in that case you'll have to do the testing since I only have an
LCDK. I should be able to send the series within the hour.
 
Karl

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#1459860 — Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node

On Wednesday 10 August 2016 02:04 PM, Karl Beldan wrote:
> On Wed, Aug 10, 2016 at 01:59:26PM +0530, Sekhar Nori wrote:
>> On Wednesday 10 August 2016 01:56 PM, Karl Beldan wrote:
>>> On Wed, Aug 10, 2016 at 01:42:01PM +0530, Sekhar Nori wrote:
>>>> On Wednesday 10 August 2016 01:37 PM, Karl Beldan wrote:
>>>>> On Wed, Aug 10, 2016 at 01:32:03PM +0530, Sekhar Nori wrote:
>>>>>> On Wednesday 10 August 2016 01:18 PM, Sekhar Nori wrote:
>>>>>>> On Tuesday 09 August 2016 10:45 PM, Karl Beldan wrote:
>>>>>>>> Currently the davinci da8xx boards use the mach-davinci aemif code.
>>>>>>>> Instantiating an aemif node into the DT allows to use the ti-aemif
>>>>>>>> memory driver and is another step to better DT support.
>>>>>>>> Also it will allow to properly pass the emif timings via DT.
>>>>>>>>
>>>>>>>> Signed-off-by: Karl Beldan <kbeldan@baylibre.com>
>>>>>>>> ---
>>>>>>>>  arch/arm/boot/dts/da850.dtsi | 10 ++++++++++
>>>>>>>>  1 file changed, 10 insertions(+)
>>>>>>>>
>>>>>>>> diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
>>>>>>>> index bc10e7e..f62928c 100644
>>>>>>>> --- a/arch/arm/boot/dts/da850.dtsi
>>>>>>>> +++ b/arch/arm/boot/dts/da850.dtsi
>>>>>>>> @@ -411,6 +411,16 @@
>>>>>>>>  			dma-names = "tx", "rx";
>>>>>>>>  		};
>>>>>>>>  	};
>>>>>>>> +	aemif: aemif@68000000 {
>>>>>>>> +		compatible = "ti,da850-aemif";
>>>>>>>> +		#address-cells = <2>;
>>>>>>>> +		#size-cells = <1>;
>>>>>>>> +
>>>>>>>> +		reg = <0x68000000 0x00008000>;
>>>>>>>> +		ranges = <0 0 0x60000000 0x08000000
>>>>>>>> +			  1 0 0x68000000 0x00008000>;
>>>>>>>> +		status = "disabled";
>>>>>>>> +	};
>>>>>>>>  	nand_cs3@62000000 {
>>>>>>>>  		compatible = "ti,davinci-nand";
>>>>>>>>  		reg = <0x62000000 0x807ff
>>>>>>>
>>>>>>> The nand node should be part of aemif node like it is done for keystone
>>>>>>> boards.
>>>>>>
>>>>>> Actually, can you move the nand node out of da850.dtsi completely. Its
>>>>>> much better to keep da850.dtsi restricted to soc-internal devices and
>>>>>> keep the board level devices like NAND flash in <board>.dts file.
>>>>>>
>>>>>> Similarly, can you move the NAND pinmux definitions too to the
>>>>>> da850-evm.dts file?
>>>>>>
>>>>>> There is advantage in keeping common pinmux definitions in da850.dtsi so
>>>>>> each board doe not have to repeat them. But AEMIF is an exception as its
>>>>>> usage can really be varied (NAND, NOR, SRAM, other). Plus, different
>>>>>> boards are likely to use different chip selects so coming up with some
>>>>>> pinmux definitions which will be reused widely is really unlikely.
>>>>>>
>>>>> This is exactly what I just did for the LCDK.
>>>>> If everybody is happy with it I will do the same for the evm as I put it
>>>>> in the cover letter.
>>>>
>>>> Yes please. We dont want duplication of data between da850.dtsi and
>>>> da850-lcdk.dts files.
>>>>
>>> Then I'll wait for this series to be applied and then apply my changes
>>> to the EVM while retiring the nand_cs3 together.
>>
>> No, I prefer the fixup happens first. In the same series, you can first
>> fixup existing EVM and then add LCDK support.
>>
> 
> Well in that case you'll have to do the testing since I only have an
> LCDK. I should be able to send the series within the hour.

Sure. I can test it.

Regards,
Sekhar

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#1459491 — Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node

On Tuesday 09 August 2016 10:45 PM, Karl Beldan wrote:
> Currently the davinci da8xx boards use the mach-davinci aemif code.
> Instantiating an aemif node into the DT allows to use the ti-aemif
> memory driver and is another step to better DT support.
> Also it will allow to properly pass the emif timings via DT.
> 
> Signed-off-by: Karl Beldan <kbeldan@baylibre.com>
> ---
>  arch/arm/boot/dts/da850.dtsi | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
> index bc10e7e..f62928c 100644
> --- a/arch/arm/boot/dts/da850.dtsi
> +++ b/arch/arm/boot/dts/da850.dtsi
> @@ -411,6 +411,16 @@
>  			dma-names = "tx", "rx";
>  		};
>  	};
> +	aemif: aemif@68000000 {
> +		compatible = "ti,da850-aemif";
> +		#address-cells = <2>;
> +		#size-cells = <1>;
> +
> +		reg = <0x68000000 0x00008000>;
> +		ranges = <0 0 0x60000000 0x08000000
> +			  1 0 0x68000000 0x00008000>;
> +		status = "disabled";
> +	};
>  	nand_cs3@62000000 {
>  		compatible = "ti,davinci-nand";
>  		reg = <0x62000000 0x807ff

The nand node should be part of aemif node like it is done for keystone
boards.

Regards,
Sekhar

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#1459557 — Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node

On Wednesday 10 August 2016 01:18 PM, Sekhar Nori wrote:
> On Tuesday 09 August 2016 10:45 PM, Karl Beldan wrote:
>> Currently the davinci da8xx boards use the mach-davinci aemif code.
>> Instantiating an aemif node into the DT allows to use the ti-aemif
>> memory driver and is another step to better DT support.
>> Also it will allow to properly pass the emif timings via DT.
>>
>> Signed-off-by: Karl Beldan <kbeldan@baylibre.com>
>> ---
>>  arch/arm/boot/dts/da850.dtsi | 10 ++++++++++
>>  1 file changed, 10 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
>> index bc10e7e..f62928c 100644
>> --- a/arch/arm/boot/dts/da850.dtsi
>> +++ b/arch/arm/boot/dts/da850.dtsi
>> @@ -411,6 +411,16 @@
>>  			dma-names = "tx", "rx";
>>  		};
>>  	};
>> +	aemif: aemif@68000000 {
>> +		compatible = "ti,da850-aemif";
>> +		#address-cells = <2>;
>> +		#size-cells = <1>;
>> +
>> +		reg = <0x68000000 0x00008000>;
>> +		ranges = <0 0 0x60000000 0x08000000
>> +			  1 0 0x68000000 0x00008000>;
>> +		status = "disabled";
>> +	};
>>  	nand_cs3@62000000 {
>>  		compatible = "ti,davinci-nand";
>>  		reg = <0x62000000 0x807ff
> 
> The nand node should be part of aemif node like it is done for keystone
> boards.

Actually, can you move the nand node out of da850.dtsi completely. Its
much better to keep da850.dtsi restricted to soc-internal devices and
keep the board level devices like NAND flash in <board>.dts file.

Similarly, can you move the NAND pinmux definitions too to the
da850-evm.dts file?

There is advantage in keeping common pinmux definitions in da850.dtsi so
each board doe not have to repeat them. But AEMIF is an exception as its
usage can really be varied (NAND, NOR, SRAM, other). Plus, different
boards are likely to use different chip selects so coming up with some
pinmux definitions which will be reused widely is really unlikely.

Thanks,
Sekhar

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#1459578 — Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node

On Wed, Aug 10, 2016 at 01:32:03PM +0530, Sekhar Nori wrote:
> On Wednesday 10 August 2016 01:18 PM, Sekhar Nori wrote:
> > On Tuesday 09 August 2016 10:45 PM, Karl Beldan wrote:
> >> Currently the davinci da8xx boards use the mach-davinci aemif code.
> >> Instantiating an aemif node into the DT allows to use the ti-aemif
> >> memory driver and is another step to better DT support.
> >> Also it will allow to properly pass the emif timings via DT.
> >>
> >> Signed-off-by: Karl Beldan <kbeldan@baylibre.com>
> >> ---
> >>  arch/arm/boot/dts/da850.dtsi | 10 ++++++++++
> >>  1 file changed, 10 insertions(+)
> >>
> >> diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
> >> index bc10e7e..f62928c 100644
> >> --- a/arch/arm/boot/dts/da850.dtsi
> >> +++ b/arch/arm/boot/dts/da850.dtsi
> >> @@ -411,6 +411,16 @@
> >>  			dma-names = "tx", "rx";
> >>  		};
> >>  	};
> >> +	aemif: aemif@68000000 {
> >> +		compatible = "ti,da850-aemif";
> >> +		#address-cells = <2>;
> >> +		#size-cells = <1>;
> >> +
> >> +		reg = <0x68000000 0x00008000>;
> >> +		ranges = <0 0 0x60000000 0x08000000
> >> +			  1 0 0x68000000 0x00008000>;
> >> +		status = "disabled";
> >> +	};
> >>  	nand_cs3@62000000 {
> >>  		compatible = "ti,davinci-nand";
> >>  		reg = <0x62000000 0x807ff
> > 
> > The nand node should be part of aemif node like it is done for keystone
> > boards.
> 
> Actually, can you move the nand node out of da850.dtsi completely. Its
> much better to keep da850.dtsi restricted to soc-internal devices and
> keep the board level devices like NAND flash in <board>.dts file.
> 
> Similarly, can you move the NAND pinmux definitions too to the
> da850-evm.dts file?
> 
> There is advantage in keeping common pinmux definitions in da850.dtsi so
> each board doe not have to repeat them. But AEMIF is an exception as its
> usage can really be varied (NAND, NOR, SRAM, other). Plus, different
> boards are likely to use different chip selects so coming up with some
> pinmux definitions which will be reused widely is really unlikely.
> 
This is exactly what I just did for the LCDK.
If everybody is happy with it I will do the same for the evm as I put it
in the cover letter.
 
Karl

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#1459777 — Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node

On Wed, Aug 10, 2016 at 01:42:01PM +0530, Sekhar Nori wrote:
> On Wednesday 10 August 2016 01:37 PM, Karl Beldan wrote:
> > On Wed, Aug 10, 2016 at 01:32:03PM +0530, Sekhar Nori wrote:
> >> On Wednesday 10 August 2016 01:18 PM, Sekhar Nori wrote:
> >>> On Tuesday 09 August 2016 10:45 PM, Karl Beldan wrote:
> >>>> Currently the davinci da8xx boards use the mach-davinci aemif code.
> >>>> Instantiating an aemif node into the DT allows to use the ti-aemif
> >>>> memory driver and is another step to better DT support.
> >>>> Also it will allow to properly pass the emif timings via DT.
> >>>>
> >>>> Signed-off-by: Karl Beldan <kbeldan@baylibre.com>
> >>>> ---
> >>>>  arch/arm/boot/dts/da850.dtsi | 10 ++++++++++
> >>>>  1 file changed, 10 insertions(+)
> >>>>
> >>>> diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
> >>>> index bc10e7e..f62928c 100644
> >>>> --- a/arch/arm/boot/dts/da850.dtsi
> >>>> +++ b/arch/arm/boot/dts/da850.dtsi
> >>>> @@ -411,6 +411,16 @@
> >>>>  			dma-names = "tx", "rx";
> >>>>  		};
> >>>>  	};
> >>>> +	aemif: aemif@68000000 {
> >>>> +		compatible = "ti,da850-aemif";
> >>>> +		#address-cells = <2>;
> >>>> +		#size-cells = <1>;
> >>>> +
> >>>> +		reg = <0x68000000 0x00008000>;
> >>>> +		ranges = <0 0 0x60000000 0x08000000
> >>>> +			  1 0 0x68000000 0x00008000>;
> >>>> +		status = "disabled";
> >>>> +	};
> >>>>  	nand_cs3@62000000 {
> >>>>  		compatible = "ti,davinci-nand";
> >>>>  		reg = <0x62000000 0x807ff
> >>>
> >>> The nand node should be part of aemif node like it is done for keystone
> >>> boards.
> >>
> >> Actually, can you move the nand node out of da850.dtsi completely. Its
> >> much better to keep da850.dtsi restricted to soc-internal devices and
> >> keep the board level devices like NAND flash in <board>.dts file.
> >>
> >> Similarly, can you move the NAND pinmux definitions too to the
> >> da850-evm.dts file?
> >>
> >> There is advantage in keeping common pinmux definitions in da850.dtsi so
> >> each board doe not have to repeat them. But AEMIF is an exception as its
> >> usage can really be varied (NAND, NOR, SRAM, other). Plus, different
> >> boards are likely to use different chip selects so coming up with some
> >> pinmux definitions which will be reused widely is really unlikely.
> >>
> > This is exactly what I just did for the LCDK.
> > If everybody is happy with it I will do the same for the evm as I put it
> > in the cover letter.
> 
> Yes please. We dont want duplication of data between da850.dtsi and
> da850-lcdk.dts files.
> 
Then I'll wait for this series to be applied and then apply my changes
to the EVM while retiring the nand_cs3 together.
 
Karl

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#1459805 — Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node

On Wednesday 10 August 2016 01:37 PM, Karl Beldan wrote:
> On Wed, Aug 10, 2016 at 01:32:03PM +0530, Sekhar Nori wrote:
>> On Wednesday 10 August 2016 01:18 PM, Sekhar Nori wrote:
>>> On Tuesday 09 August 2016 10:45 PM, Karl Beldan wrote:
>>>> Currently the davinci da8xx boards use the mach-davinci aemif code.
>>>> Instantiating an aemif node into the DT allows to use the ti-aemif
>>>> memory driver and is another step to better DT support.
>>>> Also it will allow to properly pass the emif timings via DT.
>>>>
>>>> Signed-off-by: Karl Beldan <kbeldan@baylibre.com>
>>>> ---
>>>>  arch/arm/boot/dts/da850.dtsi | 10 ++++++++++
>>>>  1 file changed, 10 insertions(+)
>>>>
>>>> diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
>>>> index bc10e7e..f62928c 100644
>>>> --- a/arch/arm/boot/dts/da850.dtsi
>>>> +++ b/arch/arm/boot/dts/da850.dtsi
>>>> @@ -411,6 +411,16 @@
>>>>  			dma-names = "tx", "rx";
>>>>  		};
>>>>  	};
>>>> +	aemif: aemif@68000000 {
>>>> +		compatible = "ti,da850-aemif";
>>>> +		#address-cells = <2>;
>>>> +		#size-cells = <1>;
>>>> +
>>>> +		reg = <0x68000000 0x00008000>;
>>>> +		ranges = <0 0 0x60000000 0x08000000
>>>> +			  1 0 0x68000000 0x00008000>;
>>>> +		status = "disabled";
>>>> +	};
>>>>  	nand_cs3@62000000 {
>>>>  		compatible = "ti,davinci-nand";
>>>>  		reg = <0x62000000 0x807ff
>>>
>>> The nand node should be part of aemif node like it is done for keystone
>>> boards.
>>
>> Actually, can you move the nand node out of da850.dtsi completely. Its
>> much better to keep da850.dtsi restricted to soc-internal devices and
>> keep the board level devices like NAND flash in <board>.dts file.
>>
>> Similarly, can you move the NAND pinmux definitions too to the
>> da850-evm.dts file?
>>
>> There is advantage in keeping common pinmux definitions in da850.dtsi so
>> each board doe not have to repeat them. But AEMIF is an exception as its
>> usage can really be varied (NAND, NOR, SRAM, other). Plus, different
>> boards are likely to use different chip selects so coming up with some
>> pinmux definitions which will be reused widely is really unlikely.
>>
> This is exactly what I just did for the LCDK.
> If everybody is happy with it I will do the same for the evm as I put it
> in the cover letter.

Yes please. We dont want duplication of data between da850.dtsi and
da850-lcdk.dts files.

Thanks,
Sekhar

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#1459630 — Re: [PATCH 2/4] ARM: dts: da850: Add an aemif node

On Wed, Aug 10, 2016 at 01:18:51PM +0530, Sekhar Nori wrote:
> On Tuesday 09 August 2016 10:45 PM, Karl Beldan wrote:
> > Currently the davinci da8xx boards use the mach-davinci aemif code.
> > Instantiating an aemif node into the DT allows to use the ti-aemif
> > memory driver and is another step to better DT support.
> > Also it will allow to properly pass the emif timings via DT.
> > 
> > Signed-off-by: Karl Beldan <kbeldan@baylibre.com>
> > ---
> >  arch/arm/boot/dts/da850.dtsi | 10 ++++++++++
> >  1 file changed, 10 insertions(+)
> > 
> > diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
> > index bc10e7e..f62928c 100644
> > --- a/arch/arm/boot/dts/da850.dtsi
> > +++ b/arch/arm/boot/dts/da850.dtsi
> > @@ -411,6 +411,16 @@
> >  			dma-names = "tx", "rx";
> >  		};
> >  	};
> > +	aemif: aemif@68000000 {
> > +		compatible = "ti,da850-aemif";
> > +		#address-cells = <2>;
> > +		#size-cells = <1>;
> > +
> > +		reg = <0x68000000 0x00008000>;
> > +		ranges = <0 0 0x60000000 0x08000000
> > +			  1 0 0x68000000 0x00008000>;
> > +		status = "disabled";
> > +	};
> >  	nand_cs3@62000000 {
> >  		compatible = "ti,davinci-nand";
> >  		reg = <0x62000000 0x807ff
> 
> The nand node should be part of aemif node like it is done for keystone
> boards.
> 
Hmm, this is exactly what I have done.
 
Karl

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