from arm_tpiu_swo.c:338
static const struct jim_nvp nvp_arm_tpiu_swo_protocol_opts[] = {
{ .name = "sync", .value = TPIU_SPPR_PROTOCOL_SYNC },
{ .name = "uart", .value = TPIU_SPPR_PROTOCOL_UART },
{ .name = "manchester", .value = TPIU_SPPR_PROTOCOL_MANCHESTER },
{ .name = NULL, .value = -1 },
};