mmc: sdhci: allow sdio interrupts while sdhci runtime suspended
Allow SDIO interrupts to be received while the SDHCI host is runtime
suspended. We do this by leaving the AHB clock enabled while the
host is runtime suspended so we can access the SDHCI registers, and
so read and raise the SDIO card interrupt.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-by: Markus Pargmann <mpa@pengutronix.de>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <chris@printf.net>
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 8def391..0ecbcc4 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1711,8 +1711,7 @@
static void sdhci_enable_sdio_irq_nolock(struct sdhci_host *host, int enable)
{
- /* SDIO IRQ will be enabled as appropriate in runtime resume */
- if (!(host->flags & SDHCI_DEVICE_DEAD) || host->runtime_suspended) {
+ if (!(host->flags & SDHCI_DEVICE_DEAD)) {
if (enable)
sdhci_unmask_irqs(host, SDHCI_INT_CARD_INT);
else
@@ -2426,7 +2425,7 @@
spin_lock(&host->lock);
- if (host->runtime_suspended) {
+ if (host->runtime_suspended && !sdhci_sdio_irq_enabled(host)) {
spin_unlock(&host->lock);
return IRQ_NONE;
}
@@ -2692,7 +2691,7 @@
}
spin_lock_irqsave(&host->lock, flags);
- sdhci_mask_irqs(host, SDHCI_INT_ALL_MASK);
+ sdhci_mask_irqs(host, SDHCI_INT_ALL_MASK & ~SDHCI_INT_CARD_INT);
spin_unlock_irqrestore(&host->lock, flags);
synchronize_hardirq(host->irq);