CCU_AHB1_CLK_SRC_SEL
switch (reg & CCU_AHB1_CLK_SRC_SEL) {
switch (reg & CCU_AHB1_CLK_SRC_SEL) {
switch (reg & CCU_AHB1_CLK_SRC_SEL) {
switch (reg & CCU_AHB1_CLK_SRC_SEL) {
switch (reg & CCU_AHB1_CLK_SRC_SEL) {