diff options
| author | Aaron Lu <aaron.lu@intel.com> | 2013-03-05 03:24:52 (GMT) |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2013-03-22 16:26:54 (GMT) |
| commit | eed222aca8d077af3600b651176f6fd04d95cce1 (patch) | |
| tree | 741ebe379dda6cf1eaf9632812b2e9febc6fccb7 /drivers/mmc/core | |
| parent | 94144a465dd0b34b3249f988a09472d0f57ad2b7 (diff) | |
| download | linux-fsl-qoriq-eed222aca8d077af3600b651176f6fd04d95cce1.tar.xz | |
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.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c index 5e57048..8d6bb18 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); } |