diff options
| author | Tom Rini <trini@ti.com> | 2014-02-05 10:24:22 -0500 |
|---|---|---|
| committer | Pantelis Antoniou <panto@antoniou-consulting.com> | 2014-02-07 18:17:49 +0200 |
| commit | 5a99b9de1a845bf254292ae4730633e6ca8a29c7 (patch) | |
| tree | 1affc403ef892fb8c5eafac34221d77adfccbbed /drivers/mmc | |
| parent | 792970b0a344d905848fb98564ed469786af11b7 (diff) | |
cmd_mmc.c: Add bootbus mmc sub-command
Add a bootbus sub-command to the mmc command to allow for setting
the boot_bus_width, reset_boot_bus_width and boot_mode fields of
BOOT_BUS_WIDTH (EXT_CSD[177]).
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Tom Rini <trini@ti.com>
Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/mmc.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 907c4185ade..37719d26558 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1507,6 +1507,27 @@ int mmc_boot_part_access(struct mmc *mmc, u8 ack, u8 part_num, u8 access) } /* + * Modify EXT_CSD[177] which is BOOT_BUS_WIDTH + * based on the passed in values for BOOT_BUS_WIDTH, RESET_BOOT_BUS_WIDTH + * and BOOT_MODE. + * + * Returns 0 on success. + */ +int mmc_set_boot_bus_width(struct mmc *mmc, u8 width, u8 reset, u8 mode) +{ + int err; + + err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_BUS_WIDTH, + EXT_CSD_BOOT_BUS_WIDTH_MODE(mode) | + EXT_CSD_BOOT_BUS_WIDTH_RESET(reset) | + EXT_CSD_BOOT_BUS_WIDTH_WIDTH(width)); + + if (err) + return err; + return 0; +} + +/* * Modify EXT_CSD[179] which is PARTITION_CONFIG (formerly BOOT_CONFIG) * based on the passed in values for BOOT_ACK, BOOT_PARTITION_ENABLE and * PARTITION_ACCESS. |