diff --git a/src/mainboard/google/nyan/mainboard.c b/src/mainboard/google/nyan/mainboard.c
index 56a34031f7..6fa8a95bba 100644
--- a/src/mainboard/google/nyan/mainboard.c
+++ b/src/mainboard/google/nyan/mainboard.c
@@ -243,14 +243,17 @@ static void mainboard_init(device_t dev)
 	 * conntected to AHUB (AUDIO, APBIF, I2S, DAM, AMX, ADX, SPDIF, AFC) out
 	 * of reset and clock-enabled, otherwise reading AHUB devices (In our
 	 * case, I2S/APBIF/AUDIO<XBAR>) will hang.
+	 *
+	 * Note that CLK_H_MEM (MC) and CLK_H_EMC should be already either
+	 * initialized by BootROM, or in romstage SDRAM initialization.
 	 */
 	clock_enable_clear_reset(CLK_L_GPIO | CLK_L_I2C1 | CLK_L_SDMMC4 |
 				 CLK_L_I2S0 | CLK_L_I2S1 | CLK_L_I2S2 |
 				 CLK_L_SPDIF | CLK_L_USBD | CLK_L_DISP1 |
 				 CLK_L_HOST1X,
 
-				 CLK_H_EMC | CLK_H_I2C2 | CLK_H_SBC1 |
-				 CLK_H_PMC | CLK_H_MEM | CLK_H_USB3,
+				 CLK_H_I2C2 | CLK_H_SBC1 | CLK_H_PMC |
+				 CLK_H_USB3,
 
 				 CLK_U_I2C3 | CLK_U_CSITE | CLK_U_SDMMC3,