Re: [PATCH 08/12] dt-bindings: i2c: renesas,riic: Document the R9A08G045 support

claudiu beznea
2024-06-21T13:06:10Z

On 21.06.2024 15:56, Biju Das wrote:
>
> Hi claudiu,
>
>> -----Original Message-----
>> From: claudiu beznea <claudiu.beznea@tuxon.dev>
>> Sent: Friday, June 21, 2024 1:55 PM
>> Subject: Re: [PATCH 08/12] dt-bindings: i2c: renesas,riic: Document the R9A08G045 support
>>
>>
>>
>> On 21.06.2024 15:34, Biju Das wrote:
>>> Hi Claudiu,
>>>
>>>> -----Original Message-----
>>>> From: Claudiu <claudiu.beznea@tuxon.dev>
>>>> Sent: Friday, June 21, 2024 12:23 PM
>>>> Subject: [PATCH 08/12] dt-bindings: i2c: renesas,riic: Document the
>>>> R9A08G045 support
>>>>
>>>> From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
>>>>
>>>> Document the Renesas RZ/G3S (R9A08G045) RIIC IP. This is compatible
>>>> with the version available on Renesas RZ/V2H (R9A09G075). Most of the
>>>> IP variants that the RIIC driver is working with supports fast mode plus.
>>>> However, it happens that on the same SoC to have IP instatiations
>>>> that support fast mode plus as well as IP instantiation that doesn't
>>>> support it. For this, introduced the renesas,riic-no-fast- mode-plus property.
>>>>
>>>> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
>>>> ---
>>>> Documentation/devicetree/bindings/i2c/renesas,riic.yaml | 8 ++++++++
>>>> 1 file changed, 8 insertions(+)
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/i2c/renesas,riic.yaml
>>>> b/Documentation/devicetree/bindings/i2c/renesas,riic.yaml
>>>> index 91ecf17b7a81..c0964edbca69 100644
>>>> --- a/Documentation/devicetree/bindings/i2c/renesas,riic.yaml
>>>> +++ b/Documentation/devicetree/bindings/i2c/renesas,riic.yaml
>>>> @@ -25,6 +25,10 @@ properties:
>>>> - renesas,riic-r9a07g054 # RZ/V2L
>>>> - const: renesas,riic-rz # RZ/A or RZ/G2L
>>>>
>>>> + - items:
>>>> + - const: renesas,riic-r9a08g045 # RZ/G3S
>>>> + - const: renesas,riic-r9a09g057
>>>> +
>>>> - const: renesas,riic-r9a09g057 # RZ/V2H(P)
>>>>
>>>> reg:
>>>> @@ -66,6 +70,10 @@ properties:
>>>> resets:
>>>> maxItems: 1
>>>>
>>>> + renesas,riic-no-fast-mode-plus:
>>>> + description: specifies if fast mode plus is not supported
>>>> + type: Boolean
>>>
>>> Can't this info, as part of device data?? Based on frequency and
>>> device data is enough to derive this info??
>>
>> We can't rely completely on device data because on RZ/G3S we have 2 RIIC channels that support fast
>> mode plus and 2 that doesn't support it.
>
> Can't array of bits for this channels won't help??

Can you give an example? I'm not sure I understand how you would prefer me
to use the array of bits.

Thank you,
Claudiu Beznea

> Based on the bit info, you have that details and check against frequency defined in DT.
>
> Cheers,
> Biju