On 17/12/2024 10:31, Ivaylo Ivanov wrote:
> On 12/17/24 11:26, Krzysztof Kozlowski wrote:
>> On 17/12/2024 10:08, Ivaylo Ivanov wrote:
>>>>>>> - items:
>>>>>>> - enum:
>>>>>>> @@ -94,9 +95,28 @@ allOf:
>>>>>>> - clock-names
>>>>>>>
>>>>>>> else:
>>>>>>> - properties:
>>>>>>> - clocks:
>>>>>>> - maxItems: 1
>>>>>>> + if:
>>>>>>> + properties:
>>>>>>> + compatible:
>>>>>>> + contains:
>>>>>>> + enum:
>>>>>>> + - samsung,exynos8895-hsi2c
>>>>>>> +
>>>>>>> + then:
>>>>>>> + properties:
>>>>>>> + clocks:
>>>>>> Missing minItems
>>>>>>
>>>>>>> + maxItems: 2
>>>>>>> +
>>>>>>> + clock-names:
>>>>>> Ditto
>>>>>>
>>>>>>> + maxItems: 2
>>>>>>> +
>>>>>>> + required:
>>>>>>> + - clock-names
>>>>>> I don't understand why do you need second, same branch in if, basically
>>>>> Because, as I stated in the commit message, we have HSI2C controllers
>>>>> both implemented in USIv1 blocks and outside. These that are a part of
>>>> On Exynos8895? Where? With the same compatible?
>>> hsi2c_0 which has a clock from BUSC and hsi2c_1 to hsi2c_4 which use clocks
>>> from PERIC1 (CLK_GOUT_PERIC1_HSI2C_CAM{0,1,2,3}_IPCLK). Why would
>>> they need a different compatible though? It's functionally the same i2c design
>>> as the one implemented in USIv1 blocks.
>> If one block is part of USI and other not, they might not be the same
>> I2C blocks, even if interface is similar. If they were the same or even
>> functionally the same, they would have the same clock inputs. However
>
> I see, so in such case I should make samsung,exynos8895-hsi2c-nonusi or
> something like that?
>
>> user manual also suggests that there is only one clock, not two (for
>> both cases), so they could be functionally equivalent but then number of
>> clocks looks incorrect.
>
> That'd be weird. Both according to downstream and upstream clk driver,
> for the USI-implemented i2cs we have a pclk and an sclk_usi.
Something is not precise here, as usually with Samsung clock topology.
First, the non-USI instances have the IPCLK as well, e.g. things like
PERIC1_UID_HSI2C_CAM1_IPCLKPORT_iPCLK
USI have BLK_PERIC0_UID_USI03_IPCLKPORT_i_SCLK_USI, but that's USI
clock, not HSI2C in USI. Datasheet mentions this is UART and SPI special
clock, but not I2C. The PCLK is used for HSI2C iPCLK.
Best regards,
Krzysztof
