On Tue, Oct 16, 2012 at 09:01:40PM -0700, Yong Ding wrote:
> Shawn,
> Thanks for your comment. And sorry for my so late due to illness:-)
> SDHCI_QUIRK_BROKEN_CARD_DETECTION is used for notifying we don't use the host internal card detection method so that we don't need enable/disable those relevant interrupt bits of host(sdhci_set_card_detection in sdhci.c).
> And as I double-checked the latest kernel code, actually sdhci-esdhc-imx sets this flag by default, and then will clear it only when the detection type is ESDHC_CD_CONTROLLER. So this aligns with my understanding.
What I was saying is the bit will be cleared when the detection type is
ESDHC_CD_CONTROLLE or ESDHC_CD_GPIO. You may have missed the fact that
there is no "break" in case ESDHC_CD_GPIO but a "fall through" comment.
switch (boarddata->cd_type) {
case ESDHC_CD_GPIO:
err = gpio_request_one(boarddata->cd_gpio, GPIOF_IN, "ESDHC_CD");
if (err) {
dev_err(mmc_dev(host->mmc),
"no card-detect pin available!\n");
goto no_card_detect_pin;
}
err = request_irq(gpio_to_irq(boarddata->cd_gpio), cd_irq,
IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
mmc_hostname(host->mmc), host);
if (err) {
dev_err(mmc_dev(host->mmc), "request irq error\n");
goto no_card_detect_irq;
}
/* fall through */
case ESDHC_CD_CONTROLLER:
/* we have a working card_detect back */
host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
break;
case ESDHC_CD_PERMANENT:
host->mmc->caps = MMC_CAP_NONREMOVABLE;
break;
case ESDHC_CD_NONE:
break;
}
Shawn
> What I want to do is that 1st we shall set MMC_CAP_NEEDS_POLL by our host driver itself and 2nd remove the improper logic in sdhci_add_host() . How do u think? Thanks.
>
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