mmc: sdio: bind acpi with sdio function device
ACPI spec 5 defined the _ADR encoding for sdio bus as:
High word - slot number (0 based)
Low word - function number
This patch adds support for binding sdio function device with acpi node,
and if successful, involve acpi into its power management.
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index 5e57048..8d6bb182 100644
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -16,6 +16,7 @@
#include <linux/export.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>
+#include <linux/acpi.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
@@ -299,6 +300,19 @@
return func;
}
+#ifdef CONFIG_ACPI
+static void sdio_acpi_set_handle(struct sdio_func *func)
+{
+ struct mmc_host *host = func->card->host;
+ u64 addr = (host->slotno << 16) | func->num;
+
+ ACPI_HANDLE_SET(&func->dev,
+ acpi_get_child(ACPI_HANDLE(host->parent), addr));
+}
+#else
+static inline void sdio_acpi_set_handle(struct sdio_func *func) {}
+#endif
+
/*
* Register a new SDIO function with the driver model.
*/
@@ -308,9 +322,12 @@
dev_set_name(&func->dev, "%s:%d", mmc_card_id(func->card), func->num);
+ sdio_acpi_set_handle(func);
ret = device_add(&func->dev);
- if (ret == 0)
+ if (ret == 0) {
sdio_func_set_present(func);
+ acpi_dev_pm_attach(&func->dev, false);
+ }
return ret;
}
@@ -326,6 +343,7 @@
if (!sdio_func_present(func))
return;
+ acpi_dev_pm_detach(&func->dev, false);
device_del(&func->dev);
put_device(&func->dev);
}
diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index c7ccf30..3dee22d 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -1279,6 +1279,7 @@
}
host->mmc->pm_caps = MMC_PM_KEEP_POWER | MMC_PM_WAKE_SDIO_IRQ;
+ host->mmc->slotno = slotno;
ret = sdhci_add_host(host);
if (ret)