2013/2/27 Chris Ball <cjb@xxxxxxxxxx>:
> Hi,
>
> On Wed, Feb 27 2013, Kevin Liu wrote:
>> Thanks for quick answer!
>> Then if broken-cd/SDHCI_QUIRK_BROKEN_CARD_DETECTION is selected, can I
>> use host controller Present State Register[18] (offset 0x24) to know
>> card status (present or not)?
>
> sdhci.c:
>
> present = mmc_gpio_get_cd(host->mmc);
> if (present < 0) {
> /* If polling, assume that the card is always present. */
> if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION)
> present = 1;
> else
> present = sdhci_readl(host, SDHCI_PRESENT_STATE) &
> SDHCI_CARD_PRESENT;
> }
>
I just want to confirm this code:)
Then when SDHCI_QUIRK_BROKEN_CARD_DETECTION is selected, read register
SDHCI_PRESENT_STATE is _not_ reliable.
I'm clear now.
Thanks
Kevin
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