From fe007c02f9659f5c0ae6f3ceaf45076df92cc88e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Heiko=20St=C3=BCbner?= <heiko@sntech.de>
Date: Sun, 18 Nov 2012 19:50:05 +0100
Subject: [PATCH] mmc: sdhci-s3c: fix missing clock for gpio card-detect
2abeb5c5ded2 ("Add clk_(enable/disable) in runtime suspend/resume")
added the capability to stop the clocks when the device is runtime
suspended, but forgot to handle the case of the card-detect using
an external gpio.
Therefore in the case that runtime-pm is enabled, start the io-clock
when a card is inserted and stop it again once it is removed.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
drivers/mmc/host/sdhci-s3c.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c
index a54dd5d7a5f9..c9ec725884e5 100644
--- a/drivers/mmc/host/sdhci-s3c.c
+++ b/drivers/mmc/host/sdhci-s3c.c
@@ -373,18 +373,25 @@ static struct sdhci_ops sdhci_s3c_ops = {
static void sdhci_s3c_notify_change(struct platform_device *dev, int state)
{
struct sdhci_host *host = platform_get_drvdata(dev);
+ struct sdhci_s3c *sc = sdhci_priv(host);
unsigned long flags;
if (host) {
spin_lock_irqsave(&host->lock, flags);
if (state) {
dev_dbg(&dev->dev, "card inserted.\n");
+#ifdef CONFIG_PM_RUNTIME
+ clk_prepare_enable(sc->clk_io);
+#endif
host->flags &= ~SDHCI_DEVICE_DEAD;
host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;
} else {
dev_dbg(&dev->dev, "card removed.\n");
host->flags |= SDHCI_DEVICE_DEAD;
host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
+#ifdef CONFIG_PM_RUNTIME
+ clk_disable_unprepare(sc->clk_io);
+#endif
}
tasklet_schedule(&host->card_tasklet);
spin_unlock_irqrestore(&host->lock, flags);
--
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