Re: [PATCH v2 0/4] i2c/clk: spacemit: k1: fix I2C bus configuration and clock handling

[Yao Zi <me@ziyao.cc>]

On Sat, Aug 15, 2026 at 11:40:20AM +0800, Junhui Liu wrote:
> Fix two issues in the SpacemiT K1 I2C driver and clock provider.
> 
> The first issue is that the controller bus mode is selected using the
> functional clock rate instead of the requested I2C bus speed from the
> device tree.
> 
> The second issue is that the TWSI functional clocks incorrectly include
> the bus clock enable bit in their gate masks. As a result the I2C driver
> can operate with only the functional clock enabled, which diverges from
> the device tree description and the Linux driver (both expect separate
> "func" and "bus" clocks).
> 
> To fix the second issue without breaking intermediate states, the
> patches are ordered as follows:
> 
> - First add the missing bus clocks (and their parent chain) to the SPL
>   clock tree.
> - Then update the I2C driver to acquire and enable both the functional
>   and bus clocks by name.
> - Finally remove the bus gate bit from the functional clock definitions
>   (except TWSI8, whose write-only register requires the combined gate).

Personally I think it's okay to break booting in this case as long as
you explicitly point it out. Merging the conceptually related PATCH 2
and PATCH 4 which together fix description of TWSI controller clocks
would make the commit description shorter and clearer. But it depends on
you.

For the whole series,

Reviewed-by: Yao Zi <me@ziyao.cc>

Regards,
Yao Zi