Commit 8af465db authored Sep 24, 2014 by Roger Tseng Committed by Ulf Hansson Sep 24, 2014

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: Roger Tseng <rogerable@realtek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

parent 7756a96d

drivers/mmc/core/core.c

+1 −0

Original line number	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->rescan_disable = 0;
		host->ios.power_mode = MMC_POWER_UNDEFINED;
		if (host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP)
		mmc_power_off(host);
		else

include/linux/mmc/host.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -42,6 +42,7 @@ struct mmc_ios {
		#define MMC_POWER_OFF 0
		#define MMC_POWER_UP 1
		#define MMC_POWER_ON 2
		#define MMC_POWER_UNDEFINED 3

		unsigned char bus_width; /* data bus width */

Admin message