2011/1/26 Linus Walleij <[email protected]>:
> 2011/1/25 Tardy, Pierre <[email protected]>:
>> @@ -1231,6 +1233,27 @@ static void sdhci_set_ios(struct mmc_host *mmc,
>> struct mmc_ios *ios)
>> goto out;
>>
>> /*
>> + * get/put runtime_pm usage counter at ios->clock transitions
>> + * We need to do it before any other chip access, as sdhci could
>> + * be power gated
>> + */
>> + lastclock = host->iosclock;
>> + host->iosclock = ios->clock;
>> + if (lastclock == 0 && ios->clock != 0) {
>> + spin_unlock_irqrestore(&host->lock, flags);
>> + pm_runtime_get_sync(host->mmc->parent);
>> + spin_lock_irqsave(&host->lock, flags);
>> + } else if (lastclock != 0 && ios->clock == 0) {
>> + spin_unlock_irqrestore(&host->lock, flags);
>> + pm_runtime_mark_last_busy(host->mmc->parent);
>> + pm_runtime_put_autosuspend(host->mmc->parent);
>> + spin_lock_irqsave(&host->lock, flags);
>> + }
>> + /* no need to configure the rest.. */
>> + if (host->iosclock == 0)
>> + goto out;
>> +
>> + /*
>> * Reset the chip on each power off.
>> * Should clear out any weird states.
>> */
>
> Aha I get it. So it uses the freq shift from the existing clock gate
> code to hint rpm, that's actually how I envisioned that this would
> work for this case.
>
> Now I really started liking this patch.
> Acked-by: Linus Walleij <[email protected]>
Which shall be interpreted as for the patch with the above code, not
the one which is subject for this post I believe.
Pierre, I can't locate your patches for some reason, care to repost
them?
Yours,
Linus Walleij
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