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mmc: sdhci: fix wakeup configuration 

Activating wakeup event is not enough to get a wakeup signal. The
corresponding events have to be enabled in the Interrupt Status Enable
Register too. It follows the specification and is needed at least by
sdhci-of-at91.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Ludovic Desroches 2016-05-13 15:16:02 +02:00 committed by Ulf Hansson
parent e87c85617d
commit 84d6260529
1 changed files with 14 additions and 1 deletions
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15
drivers/mmc/host/sdhci.c
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@ -2605,18 +2605,31 @@ static irqreturn_t sdhci_thread_irq(int irq, void *dev_id)
\*****************************************************************************/
#ifdef CONFIG_PM
/*
* To enable wakeup events, the corresponding events have to be enabled in
* the Interrupt Status Enable register too. See 'Table 1-6: Wakeup Signal
* Table' in the SD Host Controller Standard Specification.
* It is useless to restore SDHCI_INT_ENABLE state in
* sdhci_disable_irq_wakeups() since it will be set by
* sdhci_enable_card_detection() or sdhci_init().
*/
void sdhci_enable_irq_wakeups(struct sdhci_host *host)
{
u8 val;
u8 mask = SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE
| SDHCI_WAKE_ON_INT;
u32 irq_val = SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE |
SDHCI_INT_CARD_INT;
val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL);
val |= mask ;
/* Avoid fake wake up */
if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION)
if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) {
val &= ~(SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE);
irq_val &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
}
sdhci_writeb(host, val, SDHCI_WAKE_UP_CONTROL);
sdhci_writel(host, irq_val, SDHCI_INT_ENABLE);
}
EXPORT_SYMBOL_GPL(sdhci_enable_irq_wakeups);