From 88af56552b121295ba905db2523b1622fb4fc1e4 Mon Sep 17 00:00:00 2001 From: "Ivan T. Ivanov" <ivan.ivanov@linaro.org> Date: Mon, 6 Jul 2015 15:16:19 +0300 Subject: [PATCH] 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 <ivan.ivanov@linaro.org> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> --- drivers/mmc/host/sdhci.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 2ae8415e59f85..f85476f86c717 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); } -- 2.30.2