Re: [PATCH v2 0/3] mtd: rawnand: denali: add new clocks and improve setup_data_interface
From: Masahiro Yamada
Date: Thu Jun 14 2018 - 03:30:56 EST
2018-06-14 16:25 GMT+09:00 Richard Weinberger <richard@xxxxxxxxxxxxx>:
> Am Donnerstag, 14. Juni 2018, 07:11:04 CEST schrieb Masahiro Yamada:
>> The ->setup_data_interface() hook needs to know the clock frequency.
>> In fact, this IP needs three clocks, bus "which clock?" is really
>> confusing. (It is not described in the DT-binding at all.)
>> This series adds more clocks. In the new binding, three clocks
>> are required: core clock, bus interface clock, ECC engine clock.
>> This series also takes care of the backward compatibility by
>> providing hardcoded values in case the new clocks are missing.
>> So, existing DT should work.
>> Changes in v2:
>> - Split patches into sensible chunks
>> Masahiro Yamada (3):
>> mtd: rawnand: denali_dt: use dev as a shorthand of &pdev->dev
>> mtd: rawnand: denali_dt: add more clocks based on IP datasheet
>> mtd: rawnand: denali: optimize timing parameters for data interface
> This still means that we need to feed at least 2/3 and 3/3 into -stable to
> unbreak the driver.
3/3 is not mandatory.
You can only back-port 1/3 and 2/3.
3/3 is an optimization.
It will make the device access a little faster,
but you do not have to take it if you do not want to.
> I'd really prefer a single self-hosting fix that can go into -stable and then
> patches on top of the fix can prettify the driver.
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