Re: [PATCH 3/4] ARM: dts: BCM5301X: Add DT for ASUS RT-AC3200

[Krzysztof Kozlowski <krzk@kernel.org>]

On 17/04/2024 10:24, Arınç ÜNAL wrote:
> On 17/04/2024 06:15, Florian Fainelli wrote:
>>
>>
>> On 4/15/2024 2:10 AM, Arınç ÜNAL wrote:
>>> On 15.04.2024 10:57, Krzysztof Kozlowski wrote:
>>>> On 14/04/2024 22:21, Arınç ÜNAL wrote:
>>>>> NVRAM is described as both flash device partition and memory mapped NVMEM.
>>>>> This platform stores NVRAM on flash but makes it also memory accessible.
>>>>>
>>>>> As device partitions are described in board DTS, the nvram node must also
>>>>
>>>> Sorry, but we do not talk about partitions. Partitions are indeed board
>>>> property. But the piece of hardware, so NVMEM, is provided by SoC.
>>>>
>>>>> be defined there as its address and size will be different by board. It has
>>>>> been widely described on at least bcm4709 and bcm47094 SoC board DTS files
>>>>> here.
>>>>
>>>> These not proper arguments. What you are saying here is that SoC does no
>>>> have nvram at address 0x1c08000. Instead you are saying there some sort
>>>> of bus going out of SoC to the board and on the board physically there
>>>> is some NVRAM sort of memory attached to this bus.
>>>
>>> Yes that is the case. NVRAM is stored on a partition on the flash. On the
>>> Broadcom NorthStar platform, the NAND flash base is 0x1c000000, the NOR
>>> flash base is 0x1e000000.
>>>
>>> For the board in this patch, the flash is a NAND flash. The NVRAM partition
>>> starts at address 0x00080000. Therefore, the NVRAM component's address is
>>> 0x1c080000.
>>
>> Because the flash is memory mapped into the CPU's address space, a separate node was defined since it is not part of the "soc" node which describes the bridge that connects all of the peripherals.
>>
>> Whether we should create an additional bus node which describes the bridge being used to access the flash devices using the MMIO windows is debatable. Rafal, what do you think?
> 
> Will this block this patch series? If not, I'd like to submit the next
> version with Krzysztof's comments on earlycon and stdout-path addressed.

Why are you so impatient? The review process takes time and your
reluctance to take responsibility for issues here are no helping.

Best regards,
Krzysztof