diff options
Diffstat (limited to 'common')
| -rw-r--r-- | common/cmd_mmc.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c index bd1edc8..c1916c9 100644 --- a/common/cmd_mmc.c +++ b/common/cmd_mmc.c @@ -330,6 +330,40 @@ static int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) printf("EMMC boot partition Size change Failed.\n"); return 1; } + } else if (strcmp(argv[1], "rst-function") == 0) { + /* + * Set the RST_n_ENABLE bit of RST_n_FUNCTION + * The only valid values are 0x0, 0x1 and 0x2 and writing + * a value of 0x1 or 0x2 sets the value permanently. + */ + int dev; + struct mmc *mmc; + u8 enable; + + if (argc == 4) { + dev = simple_strtoul(argv[2], NULL, 10); + enable = simple_strtoul(argv[3], NULL, 10); + } else { + return CMD_RET_USAGE; + } + + if (enable > 2 || enable < 0) { + puts("Invalid RST_n_ENABLE value\n"); + return CMD_RET_USAGE; + } + + mmc = find_mmc_device(dev); + if (!mmc) { + printf("no mmc device at slot %x\n", dev); + return 1; + } + + if (IS_SD(mmc)) { + puts("RST_n_FUNCTION only exists on eMMC\n"); + return 1; + } + + return mmc_set_rst_n_function(mmc, enable); #endif /* CONFIG_SUPPORT_EMMC_BOOT */ } @@ -436,6 +470,9 @@ U_BOOT_CMD( " - Change sizes of boot and RPMB partitions of specified device\n" "mmc partconf dev boot_ack boot_partition partition_access\n" " - Change the bits of the PARTITION_CONFIG field of the specified device\n" + "mmc rst-function dev value\n" + " - Change the RST_n_FUNCTION field of the specified device\n" + " WARNING: This is a write-once field and 0 / 1 / 2 are the only valid values.\n" #endif "mmc setdsr - set DSR register value\n" ); |