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Commit eed222ac authored by Aaron Lu's avatar Aaron Lu Committed by Chris Ball
Browse files

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: default avatarAaron Lu <aaron.lu@intel.com>
Reviewed-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent 94144a46

drivers/mmc/core/sdio_bus.c

+19 −1
Original line number Diff line number Diff line
@@ -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);

}

drivers/mmc/host/sdhci-pci.c

+1 −0
Original line number Diff line number Diff line
@@ -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)

include/linux/mmc/host.h

+2 −0
Original line number Diff line number Diff line
@@ -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;

};