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authorAaron Lu <aaron.lu@intel.com>2013-03-05 11:24:52 +0800
committerChris Ball <cjb@laptop.org>2013-03-22 12:26:54 -0400
commiteed222aca8d077af3600b651176f6fd04d95cce1 (patch)
tree741ebe379dda6cf1eaf9632812b2e9febc6fccb7 /drivers/mmc/core
parent94144a465dd0b34b3249f988a09472d0f57ad2b7 (diff)
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>
Diffstat (limited to 'drivers/mmc/core')
-rw-r--r--drivers/mmc/core/sdio_bus.c20
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index 5e57048e2c1d..8d6bb1821834 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 @@ struct sdio_func *sdio_alloc_func(struct mmc_card *card)
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 @@ int sdio_add_func(struct sdio_func *func)
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 @@ void sdio_remove_func(struct sdio_func *func)
if (!sdio_func_present(func))
return;
+ acpi_dev_pm_detach(&func->dev, false);
device_del(&func->dev);
put_device(&func->dev);
}