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Subject[PATCH 1/1] mmc: sdhci-acpi: enable runtime-pm for device HID INT33C6
Date
sdhci-acpi supports ACPI devices which have compatibility ID
PNP0D40, however it is not possible to know if those devices
will all work correctly with runtime-pm, so that must be configured
per hardware ID.

For INT33C6, several related quirks, capabilities and flags are set:

MMC_CAP_NONREMOVABLE
The SDIO card will never be removable

SDHCI_ACPI_RUNTIME_PM
Enable runtime-pm of the host controller

MMC_CAP_POWER_OFF_CARD
Enable runtime-pm of the SDIO card

MMC_PM_KEEP_POWER
SDIO card has the capability to remain powered up
during system suspend

SDHCI_QUIRK2_HOST_OFF_CARD_ON
Always do a full reset during system resume
because the card may be already initialized having
not been powered off.

Wake-ups from the INT33C6 host controller are not supported, so the
following capability must *not* be set:

MMC_PM_WAKE_SDIO_IRQ
Enable wake on card interrupt

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
drivers/mmc/host/sdhci-acpi.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c
index 6ac3617..12b0a78 100644
--- a/drivers/mmc/host/sdhci-acpi.c
+++ b/drivers/mmc/host/sdhci-acpi.c
@@ -87,7 +87,15 @@ static const struct sdhci_ops sdhci_acpi_ops_dflt = {
.enable_dma = sdhci_acpi_enable_dma,
};

+static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
+ .quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
+ .caps = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD,
+ .flags = SDHCI_ACPI_RUNTIME_PM,
+ .pm_caps = MMC_PM_KEEP_POWER,
+};
+
static const struct acpi_device_id sdhci_acpi_ids[] = {
+ { "INT33C6", (kernel_ulong_t)&sdhci_acpi_slot_int_sdio },
{ "PNP0D40" },
{ },
};
--
1.7.11.7


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