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Commit 8af465db authored by Roger Tseng's avatar Roger Tseng Committed by Ulf Hansson
Browse files

mmc: core: Add new power_mode MMC_POWER_UNDEFINED 



Add MMC_POWER_UNDEFINED for power_mode in struct mmc_ios and use it as
the initial value of host->ios.power_mode.

For hosts with MMC_CAP2_NO_PRESCAN_POWERUP, this makes the later
mmc_power_off() do real power-off things instead of NOP, and further
prevents state messed up in cards that was already initialized (eg. by
BIOS of UEFI driver).

Signed-off-by: default avatarRoger Tseng <rogerable@realtek.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 7756a96d

drivers/mmc/core/core.c

+1 −0
Original line number Original line Diff line number Diff line
@@ -2482,6 +2482,7 @@ void mmc_start_host(struct mmc_host *host) 
{

{

	host->f_init = max(freqs[0], host->f_min);

	host->f_init = max(freqs[0], host->f_min);

	host->rescan_disable = 0;

	host->rescan_disable = 0;

	host->ios.power_mode = MMC_POWER_UNDEFINED;

	if (host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP)

	if (host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP)

		mmc_power_off(host);

		mmc_power_off(host);

	else

	else

include/linux/mmc/host.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -42,6 +42,7 @@ struct mmc_ios { 
#define MMC_POWER_OFF		0

#define MMC_POWER_OFF		0

#define MMC_POWER_UP		1

#define MMC_POWER_UP		1

#define MMC_POWER_ON		2

#define MMC_POWER_ON		2

#define MMC_POWER_UNDEFINED	3





	unsigned char	bus_width;		/* data bus width */

	unsigned char	bus_width;		/* data bus width */