From: Ivan T. Ivanov Date: Mon, 6 Jul 2015 12:16:19 +0000 (+0300) Subject: mmc: sdhci: let GPIO based card detection have higher precedence X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=88af56552b121295ba905db2523b1622fb4fc1e4;p=openwrt%2Fstaging%2Fblogic.git mmc: sdhci: let GPIO based card detection have higher precedence Controller could have BROKEN_CARD_DETECTION quirk set, but drivers could use GPIO to detect card present state. Let, when defined, GPIO take precedence, so drivers could properly detect card state and not use polling. Signed-off-by: Ivan T. Ivanov Signed-off-by: Ulf Hansson --- diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 2ae8415e59f8..f85476f86c71 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1604,15 +1604,21 @@ static int sdhci_do_get_cd(struct sdhci_host *host) if (host->flags & SDHCI_DEVICE_DEAD) return 0; - /* If polling/nonremovable, assume that the card is always present. */ - if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) || - (host->mmc->caps & MMC_CAP_NONREMOVABLE)) + /* If nonremovable, assume that the card is always present. */ + if (host->mmc->caps & MMC_CAP_NONREMOVABLE) return 1; - /* Try slot gpio detect */ + /* + * Try slot gpio detect, if defined it take precedence + * over build in controller functionality + */ if (!IS_ERR_VALUE(gpio_cd)) return !!gpio_cd; + /* If polling, assume that the card is always present. */ + if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) + return 1; + /* Host native card detect */ return !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT); }