CLK_SOURCE_EMC_2X_CLK_SRC
new_idx = FIELD_GET(CLK_SOURCE_EMC_2X_CLK_SRC, config->value);
config->value &= ~CLK_SOURCE_EMC_2X_CLK_SRC;
config->value |= FIELD_PREP(CLK_SOURCE_EMC_2X_CLK_SRC, index);
src = FIELD_GET(CLK_SOURCE_EMC_2X_CLK_SRC, config->value);
src = FIELD_GET(CLK_SOURCE_EMC_2X_CLK_SRC, value);