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mmc: core: Invent MMC_CAP2_FULL_PWR_CYCLE

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MMC_CAP2_FULL_PWR_CYCLE shall be set by host drivers which are able to
do a complete power cycle of the card. In the eMMC case that includes
both vcc and vccq.

This CAP is providing the protocol layer with important information,
needed to take optimized decisions during card initialization and in
the suspend/resume sequence.

MMC_CAP2_POWEROFF_NOTIFY is replaced by MMC_CAP2_FULL_PWR_CYCLE, since
it makes sense to use a wider scope for it.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Git-commit: 211f8b40b27a83c8513bcade87188ab168aece90
Git-repo: https://android.googlesource.com/kernel/common.git
Signed-off-by: Kaushal Kumar <kaushalk@codeaurora.org>
This commit is contained in:
Ulf Hansson 2013-06-10 17:03:46 +02:00 committed by Kaushal Kumar
parent 3a594af2bf
commit 97c8310d50
2 changed files with 2 additions and 2 deletions
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2
drivers/mmc/core/mmc.c
View file

@ -1932,7 +1932,7 @@ static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
goto out;
if (mmc_can_poweroff_notify(host->card) &&
((host->caps2 & MMC_CAP2_POWEROFF_NOTIFY) || !is_suspend))
((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
err = mmc_poweroff_notify(host->card, notify_type);
else if (mmc_card_can_sleep(host))
err = mmc_card_sleep(host);

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

@ -361,7 +361,7 @@ struct mmc_host {
#define MMC_CAP2_BOOTPART_NOACC (1 << 0) /* Boot partition no access */
#define MMC_CAP2_CACHE_CTRL (1 << 1) /* Allow cache control */
#define MMC_CAP2_POWEROFF_NOTIFY (1 << 2) /* Notify poweroff supported */
#define MMC_CAP2_FULL_PWR_CYCLE (1 << 2) /* Can do full power cycle */
#define MMC_CAP2_NO_MULTI_READ (1 << 3) /* Multiblock reads don't work */
#define MMC_CAP2_NO_SLEEP_CMD (1 << 4) /* Don't allow sleep command */
#define MMC_CAP2_HS200_1_8V_SDR (1 << 5) /* can support */