[PATCH v2] mmc: sdhci-of-arasan: Properly set corecfg_clockmultiplier on rk3399

Adrian Hunter adrian.hunter at intel.com
Thu Sep 1 05:50:13 PDT 2016

On 26/08/16 11:51, Shawn Lin wrote:
> corecfg_clockmultiplier indicates clock multiplier value of
> programmable clock generator which should be the same value
> of SDHCI_CAPABILITIES_1. The default value of the register,
> corecfg_clockmultiplier, is 0x10. But actually it is a mistake
> by designer as our intention was to set it to be zero which
> means we don't support programmable clock generator. So we have
> to make it to be zero on bootloader which seems work fine until
> now. But now we find an issue that when deploying genpd support
> for it, the remove callback will trigger the genpd to poweroff the
> power domain for sdhci-of-arasan which manage the controller, phy
> and corecfg_* stuff.
> So when we do bind/unbind the driver, we have already reinit
> the controller and phy, but without doing that for corecfg_*.
> Regarding to only the corecfg_clockmultipler is wrong, let's
> fix it by explicitly marking it to be zero when probing. With
> this change, we could do bind/unbind successfully.
> Reported-by: Ziyuan Xu <xzy.xu at rock-chips.com>
> Cc: Douglas Anderson <dianders at chromium.org>
> Signed-off-by: Shawn Lin <shawn.lin at rock-chips.com>

Acked-by: Adrian Hunter <adrian.hunter at intel.com>

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