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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>
This commit is contained in:
Aaron Lu 2013-03-05 11:24:52 +08:00 committed by Chris Ball
parent 94144a465d
commit eed222aca8
3 changed files with 22 additions and 1 deletions
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20
drivers/mmc/core/sdio_bus.c
View File

@ -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);
}

1
drivers/mmc/host/sdhci-pci.c
View File

@ -1279,6 +1279,7 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot(
}
host->mmc->pm_caps = MMC_PM_KEEP_POWER | MMC_PM_WAKE_SDIO_IRQ;
host->mmc->slotno = slotno;
ret = sdhci_add_host(host);
if (ret)

2
include/linux/mmc/host.h
View File

@ -361,6 +361,8 @@ struct mmc_host {
unsigned int actual_clock; /* Actual HC clock rate */
unsigned int slotno; /* used for sdio acpi binding */
unsigned long private[0] ____cacheline_aligned;
};