diff --git a/board/chell/board.c b/board/chell/board.c
index b0e4ec2ac5..b05926bb50 100644
--- a/board/chell/board.c
+++ b/board/chell/board.c
@@ -226,12 +226,24 @@ static void board_pmic_init(void)
 	if (system_jumped_to_this_image())
 		return;
 
+	/* Set CSDECAYEN / VCCIO decays to 0V at assertion of SLP_S0# */
+	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992, 0x30, 0x4a);
+
+	/*
+	 * Set V100ACNT / V1.00A Control Register:
+	 * Nominal output = 1.0V.
+	 */
+	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992, 0x37, 0x1a);
+
 	/*
 	 * Set V085ACNT / V0.85A Control Register:
 	 * Lower power mode = 0.7V.
 	 * Nominal output = 1.0V.
 	 */
 	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992, 0x38, 0x7a);
+
+	/* VRMODECTRL - enable low-power mode for VCCIO and V0.85A */
+	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992, 0x3b, 0x18);
 }
 DECLARE_HOOK(HOOK_INIT, board_pmic_init, HOOK_PRIO_DEFAULT);
 
diff --git a/board/glados/board.c b/board/glados/board.c
index eb39af9f4e..8bfd12a485 100644
--- a/board/glados/board.c
+++ b/board/glados/board.c
@@ -230,12 +230,24 @@ static void board_pmic_init(void)
 	if (system_jumped_to_this_image())
 		return;
 
+	/* Set CSDECAYEN / VCCIO decays to 0V at assertion of SLP_S0# */
+	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992, 0x30, 0x4a);
+
+	/*
+	 * Set V100ACNT / V1.00A Control Register:
+	 * Nominal output = 1.0V.
+	 */
+	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992, 0x37, 0x1a);
+
 	/*
 	 * Set V085ACNT / V0.85A Control Register:
 	 * Lower power mode = 0.7V.
 	 * Nominal output = 1.0V.
 	 */
 	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992, 0x38, 0x7a);
+
+	/* VRMODECTRL - enable low-power mode for VCCIO and V0.85A */
+	i2c_write8(I2C_PORT_PMIC, I2C_ADDR_BD99992, 0x3b, 0x18);
 }
 DECLARE_HOOK(HOOK_INIT, board_pmic_init, HOOK_PRIO_DEFAULT);