Re: [U-Boot] OF_PLATDATA questions on rk3399 platfrom

[Simon Glass]

Hi Kever,

On 23 May 2017 at 02:36, Kever Yang  wrote:
> Hi Ziyuan, Simon,
>
>
> On 05/20/2017 10:29 AM, Simon Glass wrote:
>>
>> Hi Ziyuan,
>>
>> On 8 May 2017 at 01:01, Ziyuan  wrote:
>>>
>>> hi simon,
>>>
>>> I need to achieve emmc_phy physical address in driver, so that I can
>>> configure phy in different scenarios (phy register address should be
>>> 0xff77f780). see below:
>>>  sdhci: sdhci@fe33 {
>>>
>>>  phys = <_phy>;
>>>  phy-names = "phy_arasan";
>>>
>>>  };
>>>
>>>  grf: syscon@ff77 {
>>>  reg = <0x0 0xff77 0x0 0x1>;
>>>
>>>  emmc_phy: phy@f780 {
>>>  compatible = "rockchip,rk3399-emmc-phy";
>>>  reg = <0xf780 0x24>;
>>>  #phy-cells = <0>;
>>>  status = "disabled";
>>>  };
>>>  };
>>>
>>>   AKA, I can't use libfdt if OF_PLATDATA is enabled,  so how to get it?
>>>
>> At present this is not supported. I'm not quite sure how to support
>> it, or at least the best way. Do you have ideas on what the C
>> structure should be for this?
>
>
> I don't know how much operation for grf access is needed in SPL,
>
> but I think driver in SPL should be simple, and OF_PLATDATA is also for
>
> reduce memory size requirement in SPL. If operation is not much, can we
>
> just use the GRF base address directly when OF_PLATDATA enabled? just
>
> like other GRF access in SPL on different board files.

I think in another thread you are hoping to use syscon/regmap for
this. Please let me know if this is not the case.

Regards,
Simon
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Re: [U-Boot] OF_PLATDATA questions on rk3399 platfrom

[Kever Yang]

Hi Ziyuan, Simon,


On 05/20/2017 10:29 AM, Simon Glass wrote:

Hi Ziyuan,

On 8 May 2017 at 01:01, Ziyuan  wrote:

hi simon,

I need to achieve emmc_phy physical address in driver, so that I can
configure phy in different scenarios (phy register address should be
0xff77f780). see below:
 sdhci: sdhci@fe33 {

 phys = <_phy>;
 phy-names = "phy_arasan";

 };

 grf: syscon@ff77 {
 reg = <0x0 0xff77 0x0 0x1>;

 emmc_phy: phy@f780 {
 compatible = "rockchip,rk3399-emmc-phy";
 reg = <0xf780 0x24>;
 #phy-cells = <0>;
 status = "disabled";
 };
 };

  AKA, I can't use libfdt if OF_PLATDATA is enabled,  so how to get it?


At present this is not supported. I'm not quite sure how to support
it, or at least the best way. Do you have ideas on what the C
structure should be for this?


I don't know how much operation for grf access is needed in SPL,

but I think driver in SPL should be simple, and OF_PLATDATA is also for

reduce memory size requirement in SPL. If operation is not much, can we

just use the GRF base address directly when OF_PLATDATA enabled? just

like other GRF access in SPL on different board files.


Thanks,
- Kever


Regards,
Simon




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Re: [U-Boot] OF_PLATDATA questions on rk3399 platfrom

[Simon Glass]

Hi Ziyuan,

On 8 May 2017 at 01:01, Ziyuan  wrote:
> hi simon,
>
> I need to achieve emmc_phy physical address in driver, so that I can
> configure phy in different scenarios (phy register address should be
> 0xff77f780). see below:
> sdhci: sdhci@fe33 {
>
> phys = <_phy>;
> phy-names = "phy_arasan";
>
> };
>
> grf: syscon@ff77 {
> reg = <0x0 0xff77 0x0 0x1>;
>
> emmc_phy: phy@f780 {
> compatible = "rockchip,rk3399-emmc-phy";
> reg = <0xf780 0x24>;
> #phy-cells = <0>;
> status = "disabled";
> };
> };
>
>  AKA, I can't use libfdt if OF_PLATDATA is enabled,  so how to get it?
>

At present this is not supported. I'm not quite sure how to support
it, or at least the best way. Do you have ideas on what the C
structure should be for this?

Regards,
Simon
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[U-Boot] OF_PLATDATA questions on rk3399 platfrom

[Ziyuan]

hi simon,

I need to achieve emmc_phy physical address in driver, so that I can 
configure phy in different scenarios (phy register address should be 
0xff77f780). see below:

sdhci: sdhci@fe33 {

phys = <_phy>;
phy-names = "phy_arasan";

};

grf: syscon@ff77 {
reg = <0x0 0xff77 0x0 0x1>;

emmc_phy: phy@f780 {
compatible = "rockchip,rk3399-emmc-phy";
reg = <0xf780 0x24>;
#phy-cells = <0>;
status = "disabled";
};
};

 AKA, I can't use libfdt if OF_PLATDATA is enabled,  so how to get it?


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