Hi Kever,
On 4 February 2017 at 16:30, Kever Yang kever.yang@rock-chips.com wrote:
Hi Simon,
For rk3399, the data for sdram driver in dts is big, I don't want to dothe copy for it,
Are you referring to the call to fdtdec_get_int_array()? Don't you have heaps of SRAM though? So why does it matter? If you are really worried about it you could loop through the data word by word instead. But why?
so I think use of-platdata is a good method, and for image size, its smaller, then it's sooner to load.
Yes it reduces the image size, but only by a small amount. I have not checked it on ARM64 but it should be around 5KB. I don't think it is very important.
Regards, Simon
Thanks,
- Kever
On 01/26/2017 10:22 PM, Simon Glass wrote:
Hi Kever,
On 17 January 2017 at 23:37, Kever Yang kever.yang@rock-chips.com wrote:
Hi Simon,
For my rk3399(64bit) dts, the address is described as below:#address-cells = <2>; reg = <0x0 0xfe320000 0x0 0x4000>;
not like 32-bit soc which reg address describe like: reg = <0xfe320000 0x4000>;
There should have some update for this dts decode, right?like: map_sysmem() regmap_init_mem_platdata()
Do you have a idea to update all these kind of function call?It will be very great if you can send a patch for it.
Thanks,
- Kever
Yes I think so.
But first I'd like to understand why we need to use of-platdata on this very modern SoC. Can you tell me the maximum SPL size you can support on this SoC? I thought you had removed the 30KB limit?
Using of-platdata only saves 3-4KB.
Regards, Simon