diff --git a/arch/arm/include/asm/arch-sunxi/prcm_sun50i.h b/arch/arm/include/asm/arch-sunxi/prcm_sun50i.h
index 5f636e8384..fd63d3aad8 100644
--- a/arch/arm/include/asm/arch-sunxi/prcm_sun50i.h
+++ b/arch/arm/include/asm/arch-sunxi/prcm_sun50i.h
@@ -37,8 +37,18 @@ struct sunxi_prcm_reg {
 	u32 w1_gate_reset;	/* 0x1ec */
 	u8 res10[0x1c];		/* 0x1f0 */
 	u32 rtc_gate_reset;	/* 0x20c */
+	u8 res11[0x34];		/* 0x210 */
+	u32 pll_ldo_cfg;	/* 0x244 */
+	u8 res12[0x8];		/* 0x248 */
+	u32 sys_pwroff_gating;	/* 0x250 */
+	u8 res13[0xbc];		/* 0x254 */
+	u32 res_cal_ctrl;	/* 0x310 */
+	u32 ohms200;		/* 0x314 */
+	u32 ohms240;		/* 0x318 */
+	u32 res_cal_status;	/* 0x31c */
 };
 check_member(sunxi_prcm_reg, rtc_gate_reset, 0x20c);
+check_member(sunxi_prcm_reg, res_cal_status, 0x31c);
 
 #define PRCM_TWI_GATE		(1 << 0)
 #define PRCM_TWI_RESET		(1 << 16)
diff --git a/arch/arm/mach-sunxi/clock_sun50i_h6.c b/arch/arm/mach-sunxi/clock_sun50i_h6.c
index a947463e0a..e5846e6381 100644
--- a/arch/arm/mach-sunxi/clock_sun50i_h6.c
+++ b/arch/arm/mach-sunxi/clock_sun50i_h6.c
@@ -9,10 +9,12 @@ void clock_init_safe(void)
 {
 	struct sunxi_ccm_reg *const ccm =
 		(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
+	struct sunxi_prcm_reg *const prcm =
+		(struct sunxi_prcm_reg *)SUNXI_PRCM_BASE;
 
 	/* this seems to enable PLLs on H616 */
 	if (IS_ENABLED(CONFIG_MACH_SUN50I_H616))
-		setbits_le32(SUNXI_PRCM_BASE + 0x250, 0x10);
+		setbits_le32(&prcm->sys_pwroff_gating, 0x10);
 
 	clock_set_pll1(408000000);
 
diff --git a/arch/arm/mach-sunxi/dram_sun50i_h6.c b/arch/arm/mach-sunxi/dram_sun50i_h6.c
index d05375c902..b332f3a3e4 100644
--- a/arch/arm/mach-sunxi/dram_sun50i_h6.c
+++ b/arch/arm/mach-sunxi/dram_sun50i_h6.c
@@ -12,6 +12,7 @@
 #include <asm/arch/clock.h>
 #include <asm/arch/dram.h>
 #include <asm/arch/cpu.h>
+#include <asm/arch/prcm.h>
 #include <linux/bitops.h>
 #include <linux/delay.h>
 #include <linux/kconfig.h>
@@ -665,6 +666,8 @@ unsigned long sunxi_dram_init(void)
 {
 	struct sunxi_mctl_com_reg * const mctl_com =
 			(struct sunxi_mctl_com_reg *)SUNXI_DRAM_COM_BASE;
+	struct sunxi_prcm_reg *const prcm =
+		(struct sunxi_prcm_reg *)SUNXI_PRCM_BASE;
 	struct dram_para para = {
 		.clk = CONFIG_DRAM_CLK,
 #ifdef CONFIG_SUNXI_DRAM_H6_LPDDR3
@@ -680,9 +683,8 @@ unsigned long sunxi_dram_init(void)
 
 	unsigned long size;
 
-	/* RES_CAL_CTRL_REG in BSP U-boot*/
-	setbits_le32(0x7010310, BIT(8));
-	clrbits_le32(0x7010318, 0x3f);
+	setbits_le32(&prcm->res_cal_ctrl, BIT(8));
+	clrbits_le32(&prcm->ohms240, 0x3f);
 
 	mctl_auto_detect_rank_width(&para);
 	mctl_auto_detect_dram_size(&para);
diff --git a/arch/arm/mach-sunxi/dram_sun50i_h616.c b/arch/arm/mach-sunxi/dram_sun50i_h616.c
index 83e8abc2f8..454c845a00 100644
--- a/arch/arm/mach-sunxi/dram_sun50i_h616.c
+++ b/arch/arm/mach-sunxi/dram_sun50i_h616.c
@@ -19,6 +19,7 @@
 #include <asm/arch/clock.h>
 #include <asm/arch/dram.h>
 #include <asm/arch/cpu.h>
+#include <asm/arch/prcm.h>
 #include <linux/bitops.h>
 #include <linux/delay.h>
 #include <linux/kconfig.h>
@@ -1001,14 +1002,16 @@ static unsigned long mctl_calc_size(struct dram_para *para)
 
 unsigned long sunxi_dram_init(void)
 {
+	struct sunxi_prcm_reg *const prcm =
+		(struct sunxi_prcm_reg *)SUNXI_PRCM_BASE;
 	struct dram_para para = {
 		.clk = CONFIG_DRAM_CLK,
 		.type = SUNXI_DRAM_TYPE_DDR3,
 	};
 	unsigned long size;
 
-	setbits_le32(0x7010310, BIT(8));
-	clrbits_le32(0x7010318, 0x3f);
+	setbits_le32(&prcm->res_cal_ctrl, BIT(8));
+	clrbits_le32(&prcm->ohms240, 0x3f);
 
 	mctl_auto_detect_rank_width(&para);
 	mctl_auto_detect_dram_size(&para);