[U-Boot] [PATCH] mmc: tmio: Reorder TMIO clock handling

[Marek Vasut]

On 11/15/2018 10:23 PM, Marek Vasut wrote:
> Reorder the tmio_sd_set_clk_rate() function such that it handles all
> of the clock requiests correctly. Specifically, before this patch,
> clock request with (mmc->clock == 0 && mmc->clk_disable) could leave
> the clock enabled, as the function would exit on if (!mmc->clock)
> condition on top and will not handle the mmc->clk_disable at all.
> 
> Rather than band-aid fixing just that particular problem, reorder
> the entire function to make it easier to understand and verify that
> all the cases are covered. The function has three sections now:
> 
> First, if mmc->clock != 0, we calculate divider for the SD block.
> Second, if mmc->clock != 0 and SD block clock are enabled and
>            current divider is not equal to the new divider, then
>            stop the clock and update the divider.
> Third, if mmc->clk_disable is set, disable the clock, otherwise
>        enable the clock. This happens independently of divider
>        update now.
> 
> Signed-off-by: Marek Vasut <marek.vasut+renesas at gmail.com>
> Cc: Masahiro Yamada <yamada.masahiro at socionext.com>

Yamada-san , can you check this one please ?

-- 
Best regards,
Marek Vasut