[U-Boot] [PATCH 6/7] mx35: Fix eSDHC clocks

[Benoît Thébaudeau]

Hi Stefano,

> > Even if the two controllers can have different clocks, this is not
> > supported by the driver. In fact, in drivers/mmc/fsl_esdhc.c:
> > 
> > int sdhc_clk = gd->sdhc_clk;
> > 
> > The driver uses always the same clock, stored in the global
> > structure.
> > Before extending the code as in this patch, the driver should be
> > modified to handle separate clocks. Currently the driver supports
> > multiple controller, but they share the same clock or at least the
> > same
> > frequency.
> 
> Indeed, I had seen that. I didn't know what to decide as to the
> driver clocks,
> so I made this change to select the correct clock if a single clock
> or frequency
> is used.
> 
> If several clock frequencies are to be supported at once, what kind
> of API would
> you like? gd->sdhc_clk could be changed to an array, then the
> corresponding
> index could be passed to the init function through the fsl_esdhc_cfg
> struct.

But there is also the issue of fsl_esdhc_mmc_init() that would need a new config
just to pass this index. I don't like that. Any suggestion?

Best regards,
Benoît