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SubjectRe: [PATCH v2 1/2] soc: mediatek: pwrap: add pwrap driver for MT8186 SoC
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On 18/01/2022 10:25, Johnson Wang wrote:
> Hi Matthias,
>
> On Fri, 2022-01-14 at 16:46 +0100, Matthias Brugger wrote:
>>
>> On 07/01/2022 11:46, Johnson Wang wrote:
>>> MT8186 are highly integrated SoC and use PMIC_MT6366 for
>>> power management. This patch adds pwrap master driver to
>>> access PMIC_MT6366.
>>>
>>
>> It seems this new arbiter is significantly different from the version
>> 1. Please
>> explain that in the commit message.
>>
>>> Signed-off-by: Johnson Wang <johnson.wang@mediatek.com>
>>> ---
>>> drivers/soc/mediatek/mtk-pmic-wrap.c | 72
>>> ++++++++++++++++++++++++++++
>>> 1 file changed, 72 insertions(+)
>>>
>>> diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c
>>> b/drivers/soc/mediatek/mtk-pmic-wrap.c
>>> index 952bc554f443..78866ebf7f04 100644
>>> --- a/drivers/soc/mediatek/mtk-pmic-wrap.c
>>> +++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
>>> @@ -30,6 +30,7 @@
>>> #define PWRAP_GET_WACS_REQ(x) (((x) >> 19) &
>>> 0x00000001)
>>> #define PWRAP_STATE_SYNC_IDLE0 BIT(20)
>>> #define PWRAP_STATE_INIT_DONE0 BIT(21)
>>> +#define PWRAP_STATE_INIT_DONE0_V2 BIT(22)
>>
>> That's a strange name, does it come from the datasheet description?
>
> Thanks for your review.
>
> No, there is only PWRAP_STATE_INIT_DONE0 in MT8186 datasheet.
> However, it's the 22nd bit in MT8186 and the 21st bit in other SoCs.
> So we changed its name to avoid redefinition of PWRAP_STATE_INIT_DONE0.
>
> Could you give us some suggestion on proper definition naming?
> Do you think PWRAP_STATE_INIT_DONE0_MT8186 will be a better choice?
>

Is this a difference that only will show up on the PMIC-wrapper of MT8186 or
will other SoCs include the same IP? If not, then PWRAP_STATE_INIT_DONE0_MT8186
should be fine. Otherwise we would need a better name.

>>
>>> #define PWRAP_STATE_INIT_DONE1 BIT(15)
>>>
>>> /* macro for WACS FSM */
>>> @@ -77,6 +78,8 @@
>>> #define PWRAP_CAP_INT1_EN BIT(3)
>>> #define PWRAP_CAP_WDT_SRC1 BIT(4)
>>> #define PWRAP_CAP_ARB BIT(5)
>>> +#define PWRAP_CAP_MONITOR_V2 BIT(6)
>>
>> Not used capability, please delete.
>>
>>
>> Regards,
>> Matthias
>
> PWRAP_CAP_MONITOR_V2 is not used right now.
> We can remove it in next version.
> But this capability will be added when we need it.
>

That's OK, we should add capability definitions once they are added to the
driver, not before that.

Thanks,
Matthias

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