support of rockchip nanopiM4 2GB board

[Deepak Das]

Hi Kever,

On 24/04/20 3:45 pm, Kever Yang wrote:
> Hi Deepak, Jagan,
>
> On 2020/4/23 下午7:29, Jagan Teki wrote:
>> On Thu, Apr 23, 2020 at 4:37 PM Deepak Das <deepakdas.linux at gmail.com> wrote:
>>> Hi Jagan,
>>>
>>> upstream uboot has the support for nanopi M4 board with 4GB LPDDR3 RAM.
>>> I have a nanopi M4 board with 2GB DDR3 RAM and able to boot this board
>>> by using ddr3 configuration.
>>>
>>> +// SPDX-License-Identifier: GPL-2.0+
>>> +/*
>>> + * Copyright (C) 2019 Jagan Teki <jagan at amarulasolutions.com>
>>> + */
>>> +
>>> +#include "rk3399-nanopi4-u-boot.dtsi"
>>> +#include "rk3399-sdram-ddr3-1866.dtsi"
>>> +
>>> +/* #include "rk3399-sdram-lpddr3-samsung-4GB-1866.dtsi" */
>>>
>>> how to handle this situation? do we need to treat this as a new board
>>> support?
>> Possible approach is to check the chip type and vendor during probe
>> and source the respective .dtsi
>>
>> YouMin and Kever, any  ideas?
>
>
> We can auto detect the different capacity for the same DRAM type, but if the dram type
>
> is not the same, it usually treat as different boards.

I don't see any other difference in these two board versions apart from DRAM type.
I will drop a patch to add support of this board after some basic testing.

>
> And this is the first time for a board use two different type DRAM, does both type of nanopi M4
>
> with DDR3 and LPDDR3 are available on the market, or maybe one of them is internal version?
>
yes, both are available at amazon.

https://www.amazon.com/FriendlyARM-Rockchip-Dual-Band-Support-Learning/dp/B07GXNK8M1

https://www.amazon.com/FriendlyARM-Rockchip-Dual-Band-Support-Learning/dp/B07H9S92X6

regards,

Deepak

>
> Thanks,
>
> - Kever
>
>
>>
>> Jagan.
>>
>>
>
>