Hi Kishon,
On 2019-07-19 12:04, Kishon Vijay Abraham I wrote:
> Hi Marek,
>
> On 19/07/19 3:22 PM, Marek Szyprowski wrote:
>> Commit 36914111e682 ("drivers: phy: add calibrate method") added support
>> for generic phy_calibrate() method, but it didn't explain in detail when
>> such method is supposed to be called. Add some more documentation directly
>> to the phy.h to make it clean that it is intended to be called after every
>> host controller reset.
>>
>> Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
>> ---
>> include/linux/phy/phy.h | 12 ++++++++++++
>> 1 file changed, 12 insertions(+)
>>
>> diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
>> index 15032f145063..46775e8b0ed9 100644
>> --- a/include/linux/phy/phy.h
>> +++ b/include/linux/phy/phy.h
>> @@ -101,6 +101,18 @@ struct phy_ops {
>> int (*validate)(struct phy *phy, enum phy_mode mode, int submode,
>> union phy_configure_opts *opts);
>> int (*reset)(struct phy *phy);
>> +
>> + /**
>> + * @calibrate:
>> + *
>> + * Optional.
>> + *
>> + * Used to calibrate phy, typically by adjusting some parameters
>> + * in runtime, which are otherwise lost after host controller
>> + * reset and cannot be set in phy_init() and phy_power_on().
>> + *
>> + * Returns: 0 if successful, an negative error code otherwise
>> + */
>> int (*calibrate)(struct phy *phy);
> This should be added in drivers/phy/phy-core.c before phy_calibrate()?
Okay. Do you want to keep it also in phy.h (like for validate and
configure)?
> We could
> add a separate section in Documentation/phy.txt to document these phy_ops.
Best regards
--
Marek Szyprowski, PhD
Samsung R&D Institute Poland
