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Commit eef77aa0 authored by Ram Prakash Gupta's avatar Ram Prakash Gupta
Browse files

mmc: Add long power off notification support 



At the moment only POWER_OFF_SHORT is sent to the device in case
the host is suspended. This patch adds the support of sending
POWER_OFF_LONG notification in case the device is powered
off.

Reference:
15209ec: mmc: Add long power off notification support
62c8dce: mmc: core: Update PON based on the system state.

Change-Id: Ib842c6fd9569c66348a467f7059e84b9320d2b77
Signed-off-by: default avatarRam Prakash Gupta <rampraka@codeaurora.org>
parent 45961752

drivers/mmc/core/mmc.c

+16 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include <linux/mmc/host.h>

#include <linux/mmc/card.h>

#include <linux/mmc/mmc.h>

#include <linux/reboot.h>



#include "core.h"

#include "card.h"
@@ -1529,6 +1530,17 @@ static int mmc_select_hs200(struct mmc_card *card) 
	return err;

}



static int mmc_reboot_notify(struct notifier_block *notify_block,

		unsigned long event, void *unused)

{

	struct mmc_card *card = container_of(

			notify_block, struct mmc_card, reboot_notify);



	card->pon_type = (event != SYS_RESTART) ? MMC_LONG_PON : MMC_SHRT_PON;



	return NOTIFY_OK;

}



/*

 * Activate High Speed, HS200 or HS400ES mode if supported.

 */
@@ -1899,6 +1911,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, 
		card->rca = 1;

		memcpy(card->raw_cid, cid, sizeof(card->raw_cid));

		host->card = card;

		card->reboot_notify.notifier_call = mmc_reboot_notify;

	}



	/*
@@ -2284,6 +2297,7 @@ int mmc_send_pon(struct mmc_card *card) 
static void mmc_remove(struct mmc_host *host)

{

	mmc_exit_clk_scaling(host);

	unregister_reboot_notifier(&host->card->reboot_notify);

	mmc_remove_card(host->card);

	mmc_claim_host(host);

	host->card = NULL;
@@ -2667,6 +2681,8 @@ int mmc_attach_mmc(struct mmc_host *host) 
		goto remove_card;

	}



	register_reboot_notifier(&host->card->reboot_notify);



	return 0;



remove_card: