Re: [PATCH 1/7] mmc: sdhci: fix base clock usage in preset value

[Michał Mirosław]

On Wed, Apr 15, 2020 at 03:25:52PM +0300, Adrian Hunter wrote:
> On 2/04/20 2:54 pm, Michał Mirosław wrote:
> > Fixed commit added an unnecessary read of CLOCK_CONTROL. The value read
> > is overwritten for programmable clock preset, but is carried over for
> > divided clock preset. This can confuse sdhci_enable_clk() if the register
> > has enable bits set for some reason at time time of clock calculation.
> > value to be ORed with enable flags. Remove the read.
> 
> The read is not needed, but drivers usually manage the enable bits,
> especially disabling the clock before changing the frequency.  What driver
> is it?

Hopefully no driver requires this. It's just removing a trap.

Best Regards,
Michał Mirosław