diff options
| author | Girish K S <girish.shivananjappa@linaro.org> | 2011-10-13 12:04:16 +0530 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2011-10-26 16:32:23 -0400 |
| commit | bec8726abc72bf30d2743a722aa37cd69e7a0580 (patch) | |
| tree | eed4a3c441ff64f5719b021fce419de0fc5196d9 /include/linux/mmc/mmc.h | |
| parent | 326adda53a50ece492c3edaa60afc26fba5e3232 (diff) | |
mmc: core: Add Power Off Notify Feature eMMC 4.5
This patch adds support for the power off notify feature, available in
eMMC 4.5 devices. If the host has support for this feature, then the
mmc core will notify the device by setting the POWER_OFF_NOTIFICATION
byte in the extended csd register with a value of 1 (POWER_ON).
For suspend mode short timeout is used, whereas for the normal poweroff
long timeout is used.
Signed-off-by: Girish K S <girish.shivananjappa@linaro.org>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'include/linux/mmc/mmc.h')
| -rw-r--r-- | include/linux/mmc/mmc.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h index cd63c2dc95c..02e9e3de960 100644 --- a/include/linux/mmc/mmc.h +++ b/include/linux/mmc/mmc.h @@ -270,6 +270,7 @@ struct _mmc_csd { * EXT_CSD fields */ +#define EXT_CSD_POWER_OFF_NOTIFICATION 34 /* R/W */ #define EXT_CSD_GP_SIZE_MULT 143 /* R/W */ #define EXT_CSD_PARTITION_ATTRIBUTE 156 /* R/W */ #define EXT_CSD_PARTITION_SUPPORT 160 /* RO */ @@ -346,6 +347,11 @@ struct _mmc_csd { #define EXT_CSD_RST_N_EN_MASK 0x3 #define EXT_CSD_RST_N_ENABLED 1 /* RST_n is enabled on card */ +#define EXT_CSD_NO_POWER_NOTIFICATION 0 +#define EXT_CSD_POWER_ON 1 +#define EXT_CSD_POWER_OFF_SHORT 2 +#define EXT_CSD_POWER_OFF_LONG 3 + #define EXT_CSD_PWR_CL_8BIT_MASK 0xF0 /* 8 bit PWR CLS */ #define EXT_CSD_PWR_CL_4BIT_MASK 0x0F /* 8 bit PWR CLS */ #define EXT_CSD_PWR_CL_8BIT_SHIFT 4 |