On Monday 11 June 2018 11:39 AM, Tony Lindgren wrote:
> * Faiz Abbas <faiz_abbas@xxxxxx> [180611 06:09]:
>> Hi Tony,
>>
>> On Friday 08 June 2018 11:51 AM, Tony Lindgren wrote:
>>> * Faiz Abbas <faiz_abbas@xxxxxx> [180607 10:24]:
>>>> Hi,
>>>>
>>>> On Thursday 07 June 2018 01:05 PM, Tony Lindgren wrote:
>>>>> * Faiz Abbas <faiz_abbas@xxxxxx> [180606 06:14]:
>>>>>> +static int sysc_reset(struct sysc *ddata)
>>>>>> +{
>>>>>> + int offset = ddata->offsets[SYSC_SYSCONFIG];
>>>>>> + int val = sysc_read(ddata, offset);
>>>>>> +
>>>>>> + val |= (0x1 << ddata->cap->regbits->srst_shift);
>>>>>> + sysc_write(ddata, offset, val);
>>>>>> +
>>>>>> + /* Poll on reset status */
>>>>>> + if (ddata->cfg.quirks & SYSC_QUIRK_RESET_STATUS) {
>>>>>> + offset = ddata->offsets[SYSC_SYSSTATUS];
>>>>>> +
>>>>>> + return readl_poll_timeout(ddata->module_va + offset, val,
>>>>>> + (val & ddata->cfg.syss_mask) == 0x0,
>>>>>> + 100, MAX_MODULE_SOFTRESET_WAIT);
>>>>>> + }
>>>>>> +
>>>>>> + return 0;
>>>>>> +}
>>>>>
>>>>> I wonder if we should also add SYSS_QUIRK_RESET_STATUS in
>>>>> addition to SYSC_QUIRK_RESET status to make it easy to
>>>>> read the right register?
>>>>
>>>> I assumed SYSC_QUIRK is the prefix to indicate the ti-sysc driver not
>>>> the register. Are there layouts in which the reset status bit is in the
>>>> sysconfig register rather than the sysstatus register?
>>>
>>> Yes we can have reset status bit in either syss or syssconfig register.
>>
>> You mean sysstatus and sysconfig right?
>
> Yup.
>
>>> We detect that in sysc_init_syss_mask() but we should also set something
>>> at that point to make it clear which reset to use. But as we don't need
>>> the quirk flag, it's probably set a function pointer after the detection.
>>> So how about let's have two functions sysc_reset() and sysc_syss_reset()
>>> and then we can implement sysc_syss_reset() in a separate patch after
>>> testing it when we have a non-platform data using example for
>>> sysc_syss_reset().
>>>
>>
>> Shouldn't the function I add be called sysc_syss_reset()? The reset
>> status bit is in the sysstatus.
>
> Yes
>
Great. I thought I completely misunderstood you. But I don't see what
adding another function will accomplish. A QUIRK flag used in the same
function would work well enough.
Regards,
Faiz
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