diff --git a/arch/arm/include/asm/arch-rockchip/ddr_rk3188.h b/arch/arm/include/asm/arch-rockchip/ddr_rk3188.h
new file mode 100644
index 0000000..3d7929f
--- /dev/null
+++ b/arch/arm/include/asm/arch-rockchip/ddr_rk3188.h
@@ -0,0 +1,25 @@
+/*
+ * (C) Copyright 2015 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+#ifndef _ASM_ARCH_DDR_RK3188_H
+#define _ASM_ARCH_DDR_RK3188_H
+
+#include <asm/arch/ddr_rk3288.h>
+
+/*
+ * RK3188 Memory scheduler register map.
+ */
+struct rk3188_msch {
+	u32 coreid;
+	u32 revisionid;
+	u32 ddrconf;
+	u32 ddrtiming;
+	u32 ddrmode;
+	u32 readlatency;
+};
+check_member(rk3188_msch, readlatency, 0x0014);
+
+#endif
diff --git a/arch/arm/mach-rockchip/rk3188/Makefile b/arch/arm/mach-rockchip/rk3188/Makefile
index 7fa0104..2dc9511 100644
--- a/arch/arm/mach-rockchip/rk3188/Makefile
+++ b/arch/arm/mach-rockchip/rk3188/Makefile
@@ -6,5 +6,6 @@
 
 ifndef CONFIG_TPL_BUILD
 obj-y += clk_rk3188.o
+obj-y += sdram_rk3188.o
 obj-y += syscon_rk3188.o
 endif
diff --git a/arch/arm/mach-rockchip/rk3188/sdram_rk3188.c b/arch/arm/mach-rockchip/rk3188/sdram_rk3188.c
new file mode 100644
index 0000000..461cfcd
--- /dev/null
+++ b/arch/arm/mach-rockchip/rk3188/sdram_rk3188.c
@@ -0,0 +1,995 @@
+/*
+ * (C) Copyright 2015 Google, Inc
+ * Copyright 2014 Rockchip Inc.
+ *
+ * SPDX-License-Identifier:     GPL-2.0
+ *
+ * Adapted from the very similar rk3288 ddr init.
+ */
+
+#include <common.h>
+#include <clk.h>
+#include <dm.h>
+#include <dt-structs.h>
+#include <errno.h>
+#include <ram.h>
+#include <regmap.h>
+#include <syscon.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/cru_rk3188.h>
+#include <asm/arch/ddr_rk3188.h>
+#include <asm/arch/grf_rk3188.h>
+#include <asm/arch/pmu_rk3188.h>
+#include <asm/arch/sdram.h>
+#include <linux/err.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct chan_info {
+	struct rk3288_ddr_pctl *pctl;
+	struct rk3288_ddr_publ *publ;
+	struct rk3188_msch *msch;
+};
+
+struct dram_info {
+	struct chan_info chan[1];
+	struct ram_info info;
+	struct clk ddr_clk;
+	struct rk3188_cru *cru;
+	struct rk3188_grf *grf;
+	struct rk3188_sgrf *sgrf;
+	struct rk3188_pmu *pmu;
+};
+
+struct rk3188_sdram_params {
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+	struct dtd_rockchip_rk3188_dmc of_plat;
+#endif
+	struct rk3288_sdram_channel ch[2];
+	struct rk3288_sdram_pctl_timing pctl_timing;
+	struct rk3288_sdram_phy_timing phy_timing;
+	struct rk3288_base_params base;
+	int num_channels;
+	struct regmap *map;
+};
+
+const int ddrconf_table[] = {
+	/*
+	 * [5:4] row(13+n)
+	 * [1:0] col(9+n), assume bw=2
+	 * row	    col,bw
+	 */
+	0,
+	((2 << DDRCONF_ROW_SHIFT) | 1 << DDRCONF_COL_SHIFT),
+	((1 << DDRCONF_ROW_SHIFT) | 1 << DDRCONF_COL_SHIFT),
+	((0 << DDRCONF_ROW_SHIFT) | 1 << DDRCONF_COL_SHIFT),
+	((2 << DDRCONF_ROW_SHIFT) | 2 << DDRCONF_COL_SHIFT),
+	((1 << DDRCONF_ROW_SHIFT) | 2 << DDRCONF_COL_SHIFT),
+	((0 << DDRCONF_ROW_SHIFT) | 2 << DDRCONF_COL_SHIFT),
+	((1 << DDRCONF_ROW_SHIFT) | 0 << DDRCONF_COL_SHIFT),
+	((0 << DDRCONF_ROW_SHIFT) | 0 << DDRCONF_COL_SHIFT),
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+};
+
+#define TEST_PATTEN	0x5aa5f00f
+#define DQS_GATE_TRAINING_ERROR_RANK0	(1 << 4)
+#define DQS_GATE_TRAINING_ERROR_RANK1	(2 << 4)
+
+#ifdef CONFIG_SPL_BUILD
+static void copy_to_reg(u32 *dest, const u32 *src, u32 n)
+{
+	int i;
+
+	for (i = 0; i < n / sizeof(u32); i++) {
+		writel(*src, dest);
+		src++;
+		dest++;
+	}
+}
+
+static void ddr_reset(struct rk3188_cru *cru, u32 ch, u32 ctl, u32 phy)
+{
+	u32 phy_ctl_srstn_shift = 13;
+	u32 ctl_psrstn_shift = 11;
+	u32 ctl_srstn_shift = 10;
+	u32 phy_psrstn_shift = 9;
+	u32 phy_srstn_shift = 8;
+
+	rk_clrsetreg(&cru->cru_softrst_con[5],
+		     1 << phy_ctl_srstn_shift | 1 << ctl_psrstn_shift |
+		     1 << ctl_srstn_shift | 1 << phy_psrstn_shift |
+		     1 << phy_srstn_shift,
+		     phy << phy_ctl_srstn_shift | ctl << ctl_psrstn_shift |
+		     ctl << ctl_srstn_shift | phy << phy_psrstn_shift |
+		     phy << phy_srstn_shift);
+}
+
+static void ddr_phy_ctl_reset(struct rk3188_cru *cru, u32 ch, u32 n)
+{
+	u32 phy_ctl_srstn_shift = 13;
+
+	rk_clrsetreg(&cru->cru_softrst_con[5],
+		     1 << phy_ctl_srstn_shift, n << phy_ctl_srstn_shift);
+}
+
+static void phy_pctrl_reset(struct rk3188_cru *cru,
+			    struct rk3288_ddr_publ *publ,
+			    int channel)
+{
+	int i;
+
+	ddr_reset(cru, channel, 1, 1);
+	udelay(1);
+	clrbits_le32(&publ->acdllcr, ACDLLCR_DLLSRST);
+	for (i = 0; i < 4; i++)
+		clrbits_le32(&publ->datx8[i].dxdllcr, DXDLLCR_DLLSRST);
+
+	udelay(10);
+	setbits_le32(&publ->acdllcr, ACDLLCR_DLLSRST);
+	for (i = 0; i < 4; i++)
+		setbits_le32(&publ->datx8[i].dxdllcr, DXDLLCR_DLLSRST);
+
+	udelay(10);
+	ddr_reset(cru, channel, 1, 0);
+	udelay(10);
+	ddr_reset(cru, channel, 0, 0);
+	udelay(10);
+}
+
+static void phy_dll_bypass_set(struct rk3288_ddr_publ *publ,
+	u32 freq)
+{
+	int i;
+
+	if (freq <= 250000000) {
+		if (freq <= 150000000)
+			clrbits_le32(&publ->dllgcr, SBIAS_BYPASS);
+		else
+			setbits_le32(&publ->dllgcr, SBIAS_BYPASS);
+		setbits_le32(&publ->acdllcr, ACDLLCR_DLLDIS);
+		for (i = 0; i < 4; i++)
+			setbits_le32(&publ->datx8[i].dxdllcr,
+				     DXDLLCR_DLLDIS);
+
+		setbits_le32(&publ->pir, PIR_DLLBYP);
+	} else {
+		clrbits_le32(&publ->dllgcr, SBIAS_BYPASS);
+		clrbits_le32(&publ->acdllcr, ACDLLCR_DLLDIS);
+		for (i = 0; i < 4; i++) {
+			clrbits_le32(&publ->datx8[i].dxdllcr,
+				     DXDLLCR_DLLDIS);
+		}
+
+		clrbits_le32(&publ->pir, PIR_DLLBYP);
+	}
+}
+
+static void dfi_cfg(struct rk3288_ddr_pctl *pctl, u32 dramtype)
+{
+	writel(DFI_INIT_START, &pctl->dfistcfg0);
+	writel(DFI_DRAM_CLK_SR_EN | DFI_DRAM_CLK_DPD_EN,
+	       &pctl->dfistcfg1);
+	writel(DFI_PARITY_INTR_EN | DFI_PARITY_EN, &pctl->dfistcfg2);
+	writel(7 << TLP_RESP_TIME_SHIFT | LP_SR_EN | LP_PD_EN,
+	       &pctl->dfilpcfg0);
+
+	writel(2 << TCTRL_DELAY_TIME_SHIFT, &pctl->dfitctrldelay);
+	writel(1 << TPHY_WRDATA_TIME_SHIFT, &pctl->dfitphywrdata);
+	writel(0xf << TPHY_RDLAT_TIME_SHIFT, &pctl->dfitphyrdlat);
+	writel(2 << TDRAM_CLK_DIS_TIME_SHIFT, &pctl->dfitdramclkdis);
+	writel(2 << TDRAM_CLK_EN_TIME_SHIFT, &pctl->dfitdramclken);
+	writel(1, &pctl->dfitphyupdtype0);
+
+	/* cs0 and cs1 write odt enable */
+	writel((RANK0_ODT_WRITE_SEL | RANK1_ODT_WRITE_SEL),
+	       &pctl->dfiodtcfg);
+	/* odt write length */
+	writel(7 << ODT_LEN_BL8_W_SHIFT, &pctl->dfiodtcfg1);
+	/* phyupd and ctrlupd disabled */
+	writel(0, &pctl->dfiupdcfg);
+}
+
+static void ddr_set_enable(struct rk3188_grf *grf, uint channel, bool enable)
+{
+	uint val = 0;
+
+	if (enable)
+		val = 1 << DDR_16BIT_EN_SHIFT;
+
+	rk_clrsetreg(&grf->ddrc_con0, 1 << DDR_16BIT_EN_SHIFT, val);
+}
+
+static void ddr_set_ddr3_mode(struct rk3188_grf *grf, uint channel,
+			      bool ddr3_mode)
+{
+	uint mask, val;
+
+	mask = MSCH4_MAINDDR3_MASK << MSCH4_MAINDDR3_SHIFT;
+	val = ddr3_mode << MSCH4_MAINDDR3_SHIFT;
+	rk_clrsetreg(&grf->soc_con2, mask, val);
+}
+
+static void ddr_rank_2_row15en(struct rk3188_grf *grf, bool enable)
+{
+	uint mask, val;
+
+	mask = RANK_TO_ROW15_EN_MASK << RANK_TO_ROW15_EN_SHIFT;
+	val = enable << RANK_TO_ROW15_EN_SHIFT;
+	rk_clrsetreg(&grf->soc_con2, mask, val);
+}
+
+static void pctl_cfg(int channel, struct rk3288_ddr_pctl *pctl,
+		     struct rk3188_sdram_params *sdram_params,
+		     struct rk3188_grf *grf)
+{
+	copy_to_reg(&pctl->togcnt1u, &sdram_params->pctl_timing.togcnt1u,
+		    sizeof(sdram_params->pctl_timing));
+	switch (sdram_params->base.dramtype) {
+	case DDR3:
+		if (sdram_params->phy_timing.mr[1] & DDR3_DLL_DISABLE) {
+			writel(sdram_params->pctl_timing.tcl - 3,
+			       &pctl->dfitrddataen);
+		} else {
+			writel(sdram_params->pctl_timing.tcl - 2,
+			       &pctl->dfitrddataen);
+		}
+		writel(sdram_params->pctl_timing.tcwl - 1,
+		       &pctl->dfitphywrlat);
+		writel(0 << MDDR_LPDDR2_CLK_STOP_IDLE_SHIFT | DDR3_EN |
+		       DDR2_DDR3_BL_8 | (6 - 4) << TFAW_SHIFT | PD_EXIT_SLOW |
+		       1 << PD_TYPE_SHIFT | 0 << PD_IDLE_SHIFT,
+		       &pctl->mcfg);
+		ddr_set_ddr3_mode(grf, channel, true);
+		ddr_set_enable(grf, channel, true);
+		break;
+	}
+
+	setbits_le32(&pctl->scfg, 1);
+}
+
+static void phy_cfg(const struct chan_info *chan, int channel,
+		    struct rk3188_sdram_params *sdram_params)
+{
+	struct rk3288_ddr_publ *publ = chan->publ;
+	struct rk3188_msch *msch = chan->msch;
+	uint ddr_freq_mhz = sdram_params->base.ddr_freq / 1000000;
+	u32 dinit2;
+	int i;
+
+	dinit2 = DIV_ROUND_UP(ddr_freq_mhz * 200000, 1000);
+	/* DDR PHY Timing */
+	copy_to_reg(&publ->dtpr[0], &sdram_params->phy_timing.dtpr0,
+		    sizeof(sdram_params->phy_timing));
+	writel(sdram_params->base.noc_timing, &msch->ddrtiming);
+	writel(0x3f, &msch->readlatency);
+	writel(DIV_ROUND_UP(ddr_freq_mhz * 5120, 1000) << PRT_DLLLOCK_SHIFT |
+	       DIV_ROUND_UP(ddr_freq_mhz * 50, 1000) << PRT_DLLSRST_SHIFT |
+	       8 << PRT_ITMSRST_SHIFT, &publ->ptr[0]);
+	writel(DIV_ROUND_UP(ddr_freq_mhz * 500000, 1000) << PRT_DINIT0_SHIFT |
+	       DIV_ROUND_UP(ddr_freq_mhz * 400, 1000) << PRT_DINIT1_SHIFT,
+	       &publ->ptr[1]);
+	writel(min(dinit2, 0x1ffffU) << PRT_DINIT2_SHIFT |
+	       DIV_ROUND_UP(ddr_freq_mhz * 1000, 1000) << PRT_DINIT3_SHIFT,
+	       &publ->ptr[2]);
+
+	switch (sdram_params->base.dramtype) {
+	case DDR3:
+		clrbits_le32(&publ->pgcr, 0x1f);
+		clrsetbits_le32(&publ->dcr, DDRMD_MASK << DDRMD_SHIFT,
+				DDRMD_DDR3 << DDRMD_SHIFT);
+		break;
+	}
+	if (sdram_params->base.odt) {
+		/*dynamic RTT enable */
+		for (i = 0; i < 4; i++)
+			setbits_le32(&publ->datx8[i].dxgcr, DQSRTT | DQRTT);
+	} else {
+		/*dynamic RTT disable */
+		for (i = 0; i < 4; i++)
+			clrbits_le32(&publ->datx8[i].dxgcr, DQSRTT | DQRTT);
+	}
+}
+
+static void phy_init(struct rk3288_ddr_publ *publ)
+{
+	setbits_le32(&publ->pir, PIR_INIT | PIR_DLLSRST
+		| PIR_DLLLOCK | PIR_ZCAL | PIR_ITMSRST | PIR_CLRSR);
+	udelay(1);
+	while ((readl(&publ->pgsr) &
+		(PGSR_IDONE | PGSR_DLDONE | PGSR_ZCDONE)) !=
+		(PGSR_IDONE | PGSR_DLDONE | PGSR_ZCDONE))
+		;
+}
+
+static void send_command(struct rk3288_ddr_pctl *pctl, u32 rank,
+			 u32 cmd, u32 arg)
+{
+	writel((START_CMD | (rank << 20) | arg | cmd), &pctl->mcmd);
+	udelay(1);
+	while (readl(&pctl->mcmd) & START_CMD)
+		;
+}
+
+static inline void send_command_op(struct rk3288_ddr_pctl *pctl,
+				   u32 rank, u32 cmd, u32 ma, u32 op)
+{
+	send_command(pctl, rank, cmd, (ma & LPDDR2_MA_MASK) << LPDDR2_MA_SHIFT |
+		     (op & LPDDR2_OP_MASK) << LPDDR2_OP_SHIFT);
+}
+
+static void memory_init(struct rk3288_ddr_publ *publ,
+			u32 dramtype)
+{
+	setbits_le32(&publ->pir,
+		     (PIR_INIT | PIR_DRAMINIT | PIR_LOCKBYP
+		      | PIR_ZCALBYP | PIR_CLRSR | PIR_ICPC
+		      | (dramtype == DDR3 ? PIR_DRAMRST : 0)));
+	udelay(1);
+	while ((readl(&publ->pgsr) & (PGSR_IDONE | PGSR_DLDONE))
+		!= (PGSR_IDONE | PGSR_DLDONE))
+		;
+}
+
+static void move_to_config_state(struct rk3288_ddr_publ *publ,
+				 struct rk3288_ddr_pctl *pctl)
+{
+	unsigned int state;
+
+	while (1) {
+		state = readl(&pctl->stat) & PCTL_STAT_MSK;
+
+		switch (state) {
+		case LOW_POWER:
+			writel(WAKEUP_STATE, &pctl->sctl);
+			while ((readl(&pctl->stat) & PCTL_STAT_MSK)
+				!= ACCESS)
+				;
+			/* wait DLL lock */
+			while ((readl(&publ->pgsr) & PGSR_DLDONE)
+				!= PGSR_DLDONE)
+				;
+			/*
+			 * if at low power state,need wakeup first,
+			 * and then enter the config, so
+			 * fallthrough
+			 */
+		case ACCESS:
+			/* fallthrough */
+		case INIT_MEM:
+			writel(CFG_STATE, &pctl->sctl);
+			while ((readl(&pctl->stat) & PCTL_STAT_MSK) != CONFIG)
+				;
+			break;
+		case CONFIG:
+			return;
+		default:
+			break;
+		}
+	}
+}
+
+static void set_bandwidth_ratio(const struct chan_info *chan, int channel,
+				u32 n, struct rk3188_grf *grf)
+{
+	struct rk3288_ddr_pctl *pctl = chan->pctl;
+	struct rk3288_ddr_publ *publ = chan->publ;
+	struct rk3188_msch *msch = chan->msch;
+
+	if (n == 1) {
+		setbits_le32(&pctl->ppcfg, 1);
+		ddr_set_enable(grf, channel, 1);
+		setbits_le32(&msch->ddrtiming, 1 << 31);
+		/* Data Byte disable*/
+		clrbits_le32(&publ->datx8[2].dxgcr, 1);
+		clrbits_le32(&publ->datx8[3].dxgcr, 1);
+		/* disable DLL */
+		setbits_le32(&publ->datx8[2].dxdllcr, DXDLLCR_DLLDIS);
+		setbits_le32(&publ->datx8[3].dxdllcr, DXDLLCR_DLLDIS);
+	} else {
+		clrbits_le32(&pctl->ppcfg, 1);
+		ddr_set_enable(grf, channel, 0);
+		clrbits_le32(&msch->ddrtiming, 1 << 31);
+		/* Data Byte enable*/
+		setbits_le32(&publ->datx8[2].dxgcr, 1);
+		setbits_le32(&publ->datx8[3].dxgcr, 1);
+
+		/* enable DLL */
+		clrbits_le32(&publ->datx8[2].dxdllcr, DXDLLCR_DLLDIS);
+		clrbits_le32(&publ->datx8[3].dxdllcr, DXDLLCR_DLLDIS);
+		/* reset DLL */
+		clrbits_le32(&publ->datx8[2].dxdllcr, DXDLLCR_DLLSRST);
+		clrbits_le32(&publ->datx8[3].dxdllcr, DXDLLCR_DLLSRST);
+		udelay(10);
+		setbits_le32(&publ->datx8[2].dxdllcr, DXDLLCR_DLLSRST);
+		setbits_le32(&publ->datx8[3].dxdllcr, DXDLLCR_DLLSRST);
+	}
+	setbits_le32(&pctl->dfistcfg0, 1 << 2);
+}
+
+static int data_training(const struct chan_info *chan, int channel,
+			 struct rk3188_sdram_params *sdram_params)
+{
+	unsigned int j;
+	int ret = 0;
+	u32 rank;
+	int i;
+	u32 step[2] = { PIR_QSTRN, PIR_RVTRN };
+	struct rk3288_ddr_publ *publ = chan->publ;
+	struct rk3288_ddr_pctl *pctl = chan->pctl;
+
+	/* disable auto refresh */
+	writel(0, &pctl->trefi);
+
+	if (sdram_params->base.dramtype != LPDDR3)
+		setbits_le32(&publ->pgcr, 1 << PGCR_DQSCFG_SHIFT);
+	rank = sdram_params->ch[channel].rank | 1;
+	for (j = 0; j < ARRAY_SIZE(step); j++) {
+		/*
+		 * trigger QSTRN and RVTRN
+		 * clear DTDONE status
+		 */
+		setbits_le32(&publ->pir, PIR_CLRSR);
+
+		/* trigger DTT */
+		setbits_le32(&publ->pir,
+			     PIR_INIT | step[j] | PIR_LOCKBYP | PIR_ZCALBYP |
+			     PIR_CLRSR);
+		udelay(1);
+		/* wait echo byte DTDONE */
+		while ((readl(&publ->datx8[0].dxgsr[0]) & rank)
+			!= rank)
+			;
+		while ((readl(&publ->datx8[1].dxgsr[0]) & rank)
+			!= rank)
+			;
+		if (!(readl(&pctl->ppcfg) & 1)) {
+			while ((readl(&publ->datx8[2].dxgsr[0])
+				& rank) != rank)
+				;
+			while ((readl(&publ->datx8[3].dxgsr[0])
+				& rank) != rank)
+				;
+		}
+		if (readl(&publ->pgsr) &
+		    (PGSR_DTERR | PGSR_RVERR | PGSR_RVEIRR)) {
+			ret = -1;
+			break;
+		}
+	}
+	/* send some auto refresh to complement the lost while DTT */
+	for (i = 0; i < (rank > 1 ? 8 : 4); i++)
+		send_command(pctl, rank, REF_CMD, 0);
+
+	if (sdram_params->base.dramtype != LPDDR3)
+		clrbits_le32(&publ->pgcr, 1 << PGCR_DQSCFG_SHIFT);
+
+	/* resume auto refresh */
+	writel(sdram_params->pctl_timing.trefi, &pctl->trefi);
+
+	return ret;
+}
+
+static void move_to_access_state(const struct chan_info *chan)
+{
+	struct rk3288_ddr_publ *publ = chan->publ;
+	struct rk3288_ddr_pctl *pctl = chan->pctl;
+	unsigned int state;
+
+	while (1) {
+		state = readl(&pctl->stat) & PCTL_STAT_MSK;
+
+		switch (state) {
+		case LOW_POWER:
+			if (((readl(&pctl->stat) >> LP_TRIG_SHIFT) &
+					LP_TRIG_MASK) == 1)
+				return;
+
+			writel(WAKEUP_STATE, &pctl->sctl);
+			while ((readl(&pctl->stat) & PCTL_STAT_MSK) != ACCESS)
+				;
+			/* wait DLL lock */
+			while ((readl(&publ->pgsr) & PGSR_DLDONE)
+				!= PGSR_DLDONE)
+				;
+			break;
+		case INIT_MEM:
+			writel(CFG_STATE, &pctl->sctl);
+			while ((readl(&pctl->stat) & PCTL_STAT_MSK) != CONFIG)
+				;
+			/* fallthrough */
+		case CONFIG:
+			writel(GO_STATE, &pctl->sctl);
+			while ((readl(&pctl->stat) & PCTL_STAT_MSK) == CONFIG)
+				;
+			break;
+		case ACCESS:
+			return;
+		default:
+			break;
+		}
+	}
+}
+
+static void dram_cfg_rbc(const struct chan_info *chan, u32 chnum,
+			 struct rk3188_sdram_params *sdram_params)
+{
+	struct rk3288_ddr_publ *publ = chan->publ;
+
+	if (sdram_params->ch[chnum].bk == 3)
+		clrsetbits_le32(&publ->dcr, PDQ_MASK << PDQ_SHIFT,
+				1 << PDQ_SHIFT);
+	else
+		clrbits_le32(&publ->dcr, PDQ_MASK << PDQ_SHIFT);
+
+	writel(sdram_params->base.ddrconfig, &chan->msch->ddrconf);
+}
+
+static void dram_all_config(const struct dram_info *dram,
+			    struct rk3188_sdram_params *sdram_params)
+{
+	unsigned int chan;
+	u32 sys_reg = 0;
+
+	sys_reg |= sdram_params->base.dramtype << SYS_REG_DDRTYPE_SHIFT;
+	sys_reg |= (sdram_params->num_channels - 1) << SYS_REG_NUM_CH_SHIFT;
+	for (chan = 0; chan < sdram_params->num_channels; chan++) {
+		const struct rk3288_sdram_channel *info =
+			&sdram_params->ch[chan];
+
+		sys_reg |= info->row_3_4 << SYS_REG_ROW_3_4_SHIFT(chan);
+		sys_reg |= 1 << SYS_REG_CHINFO_SHIFT(chan);
+		sys_reg |= (info->rank - 1) << SYS_REG_RANK_SHIFT(chan);
+		sys_reg |= (info->col - 9) << SYS_REG_COL_SHIFT(chan);
+		sys_reg |= info->bk == 3 ? 0 : 1 << SYS_REG_BK_SHIFT(chan);
+		sys_reg |= (info->cs0_row - 13) << SYS_REG_CS0_ROW_SHIFT(chan);
+		sys_reg |= (info->cs1_row - 13) << SYS_REG_CS1_ROW_SHIFT(chan);
+		sys_reg |= (2 >> info->bw) << SYS_REG_BW_SHIFT(chan);
+		sys_reg |= (2 >> info->dbw) << SYS_REG_DBW_SHIFT(chan);
+
+		dram_cfg_rbc(&dram->chan[chan], chan, sdram_params);
+	}
+	if (sdram_params->ch[0].rank == 2)
+		ddr_rank_2_row15en(dram->grf, 0);
+	else
+		ddr_rank_2_row15en(dram->grf, 1);
+
+	writel(sys_reg, &dram->pmu->sys_reg[2]);
+}
+
+static int sdram_rank_bw_detect(struct dram_info *dram, int channel,
+		struct rk3188_sdram_params *sdram_params)
+{
+	int reg;
+	int need_trainig = 0;
+	const struct chan_info *chan = &dram->chan[channel];
+	struct rk3288_ddr_publ *publ = chan->publ;
+
+	ddr_rank_2_row15en(dram->grf, 0);
+
+	if (data_training(chan, channel, sdram_params) < 0) {
+		printf("first data training fail!\n");
+		reg = readl(&publ->datx8[0].dxgsr[0]);
+		/* Check the result for rank 0 */
+		if ((channel == 0) && (reg & DQS_GATE_TRAINING_ERROR_RANK0)) {
+			printf("data training fail!\n");
+			return -EIO;
+		}
+
+		/* Check the result for rank 1 */
+		if (reg & DQS_GATE_TRAINING_ERROR_RANK1) {
+			sdram_params->ch[channel].rank = 1;
+			clrsetbits_le32(&publ->pgcr, 0xF << 18,
+					sdram_params->ch[channel].rank << 18);
+			need_trainig = 1;
+		}
+		reg = readl(&publ->datx8[2].dxgsr[0]);
+		if (reg & (1 << 4)) {
+			sdram_params->ch[channel].bw = 1;
+			set_bandwidth_ratio(chan, channel,
+					    sdram_params->ch[channel].bw,
+					    dram->grf);
+			need_trainig = 1;
+		}
+	}
+	/* Assume the Die bit width are the same with the chip bit width */
+	sdram_params->ch[channel].dbw = sdram_params->ch[channel].bw;
+
+	if (need_trainig &&
+	    (data_training(chan, channel, sdram_params) < 0)) {
+		if (sdram_params->base.dramtype == LPDDR3) {
+			ddr_phy_ctl_reset(dram->cru, channel, 1);
+			udelay(10);
+			ddr_phy_ctl_reset(dram->cru, channel, 0);
+			udelay(10);
+		}
+		printf("2nd data training failed!");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+/*
+ * Detect ram columns and rows.
+ * @dram: dram info struct
+ * @channel: channel number to handle
+ * @sdram_params: sdram parameters, function will fill in col and row values
+ *
+ * Returns 0 or negative on error.
+ */
+static int sdram_col_row_detect(struct dram_info *dram, int channel,
+		struct rk3188_sdram_params *sdram_params)
+{
+	int row, col;
+	unsigned int addr;
+	const struct chan_info *chan = &dram->chan[channel];
+	struct rk3288_ddr_pctl *pctl = chan->pctl;
+	struct rk3288_ddr_publ *publ = chan->publ;
+	int ret = 0;
+
+	/* Detect col */
+	for (col = 11; col >= 9; col--) {
+		writel(0, CONFIG_SYS_SDRAM_BASE);
+		addr = CONFIG_SYS_SDRAM_BASE +
+			(1 << (col + sdram_params->ch[channel].bw - 1));
+		writel(TEST_PATTEN, addr);
+		if ((readl(addr) == TEST_PATTEN) &&
+		    (readl(CONFIG_SYS_SDRAM_BASE) == 0))
+			break;
+	}
+	if (col == 8) {
+		printf("Col detect error\n");
+		ret = -EINVAL;
+		goto out;
+	} else {
+		sdram_params->ch[channel].col = col;
+	}
+
+	ddr_rank_2_row15en(dram->grf, 1);
+	move_to_config_state(publ, pctl);
+	writel(1, &chan->msch->ddrconf);
+	move_to_access_state(chan);
+	/* Detect row, max 15,min13 in rk3188*/
+	for (row = 16; row >= 13; row--) {
+		writel(0, CONFIG_SYS_SDRAM_BASE);
+		addr = CONFIG_SYS_SDRAM_BASE + (1 << (row + 15 - 1));
+		writel(TEST_PATTEN, addr);
+		if ((readl(addr) == TEST_PATTEN) &&
+		    (readl(CONFIG_SYS_SDRAM_BASE) == 0))
+			break;
+	}
+	if (row == 12) {
+		printf("Row detect error\n");
+		ret = -EINVAL;
+	} else {
+		sdram_params->ch[channel].cs1_row = row;
+		sdram_params->ch[channel].row_3_4 = 0;
+		debug("chn %d col %d, row %d\n", channel, col, row);
+		sdram_params->ch[channel].cs0_row = row;
+	}
+
+out:
+	return ret;
+}
+
+static int sdram_get_niu_config(struct rk3188_sdram_params *sdram_params)
+{
+	int i, tmp, size, ret = 0;
+
+	tmp = sdram_params->ch[0].col - 9;
+	tmp -= (sdram_params->ch[0].bw == 2) ? 0 : 1;
+	tmp |= ((sdram_params->ch[0].cs0_row - 13) << 4);
+	size = sizeof(ddrconf_table)/sizeof(ddrconf_table[0]);
+	for (i = 0; i < size; i++)
+		if (tmp == ddrconf_table[i])
+			break;
+	if (i >= size) {
+		printf("niu config not found\n");
+		ret = -EINVAL;
+	} else {
+		debug("niu config %d\n", i);
+		sdram_params->base.ddrconfig = i;
+	}
+
+	return ret;
+}
+
+static int sdram_init(struct dram_info *dram,
+		      struct rk3188_sdram_params *sdram_params)
+{
+	int channel;
+	int zqcr;
+	int ret;
+
+	if ((sdram_params->base.dramtype == DDR3 &&
+	     sdram_params->base.ddr_freq > 800000000)) {
+		printf("SDRAM frequency is too high!");
+		return -E2BIG;
+	}
+
+	ret = clk_set_rate(&dram->ddr_clk, sdram_params->base.ddr_freq);
+	if (ret) {
+		printf("Could not set DDR clock\n");
+		return ret;
+	}
+
+	for (channel = 0; channel < 1; channel++) {
+		const struct chan_info *chan = &dram->chan[channel];
+		struct rk3288_ddr_pctl *pctl = chan->pctl;
+		struct rk3288_ddr_publ *publ = chan->publ;
+
+		phy_pctrl_reset(dram->cru, publ, channel);
+		phy_dll_bypass_set(publ, sdram_params->base.ddr_freq);
+
+		dfi_cfg(pctl, sdram_params->base.dramtype);
+
+		pctl_cfg(channel, pctl, sdram_params, dram->grf);
+
+		phy_cfg(chan, channel, sdram_params);
+
+		phy_init(publ);
+
+		writel(POWER_UP_START, &pctl->powctl);
+		while (!(readl(&pctl->powstat) & POWER_UP_DONE))
+			;
+
+		memory_init(publ, sdram_params->base.dramtype);
+		move_to_config_state(publ, pctl);
+
+		/* Using 32bit bus width for detect */
+		sdram_params->ch[channel].bw = 2;
+		set_bandwidth_ratio(chan, channel,
+				    sdram_params->ch[channel].bw, dram->grf);
+		/*
+		 * set cs, using n=3 for detect
+		 * CS0, n=1
+		 * CS1, n=2
+		 * CS0 & CS1, n = 3
+		 */
+		sdram_params->ch[channel].rank = 2,
+		clrsetbits_le32(&publ->pgcr, 0xF << 18,
+				(sdram_params->ch[channel].rank | 1) << 18);
+
+		/* DS=40ohm,ODT=155ohm */
+		zqcr = 1 << ZDEN_SHIFT | 2 << PU_ONDIE_SHIFT |
+			2 << PD_ONDIE_SHIFT | 0x19 << PU_OUTPUT_SHIFT |
+			0x19 << PD_OUTPUT_SHIFT;
+		writel(zqcr, &publ->zq1cr[0]);
+		writel(zqcr, &publ->zq0cr[0]);
+
+		/* Detect the rank and bit-width with data-training */
+		writel(1, &chan->msch->ddrconf);
+		sdram_rank_bw_detect(dram, channel, sdram_params);
+
+		if (sdram_params->base.dramtype == LPDDR3) {
+			u32 i;
+			writel(0, &pctl->mrrcfg0);
+			for (i = 0; i < 17; i++)
+				send_command_op(pctl, 1, MRR_CMD, i, 0);
+		}
+		writel(4, &chan->msch->ddrconf);
+		move_to_access_state(chan);
+		/* DDR3 and LPDDR3 are always 8 bank, no need detect */
+		sdram_params->ch[channel].bk = 3;
+		/* Detect Col and Row number*/
+		ret = sdram_col_row_detect(dram, channel, sdram_params);
+		if (ret)
+			goto error;
+	}
+	/* Find NIU DDR configuration */
+	ret = sdram_get_niu_config(sdram_params);
+	if (ret)
+		goto error;
+
+	dram_all_config(dram, sdram_params);
+	debug("%s done\n", __func__);
+
+	return 0;
+error:
+	printf("DRAM init failed!\n");
+	hang();
+}
+#endif /* CONFIG_SPL_BUILD */
+
+size_t sdram_size_mb(struct rk3188_pmu *pmu)
+{
+	u32 rank, col, bk, cs0_row, cs1_row, bw, row_3_4;
+	size_t chipsize_mb = 0;
+	size_t size_mb = 0;
+	u32 ch;
+	u32 sys_reg = readl(&pmu->sys_reg[2]);
+	u32 chans;
+
+	chans = 1 + ((sys_reg >> SYS_REG_NUM_CH_SHIFT) & SYS_REG_NUM_CH_MASK);
+
+	for (ch = 0; ch < chans; ch++) {
+		rank = 1 + (sys_reg >> SYS_REG_RANK_SHIFT(ch) &
+			SYS_REG_RANK_MASK);
+		col = 9 + (sys_reg >> SYS_REG_COL_SHIFT(ch) & SYS_REG_COL_MASK);
+		bk = 3 - ((sys_reg >> SYS_REG_BK_SHIFT(ch)) & SYS_REG_BK_MASK);
+		cs0_row = 13 + (sys_reg >> SYS_REG_CS0_ROW_SHIFT(ch) &
+				SYS_REG_CS0_ROW_MASK);
+		cs1_row = 13 + (sys_reg >> SYS_REG_CS1_ROW_SHIFT(ch) &
+				SYS_REG_CS1_ROW_MASK);
+		bw = (2 >> ((sys_reg >> SYS_REG_BW_SHIFT(ch)) &
+			SYS_REG_BW_MASK));
+		row_3_4 = sys_reg >> SYS_REG_ROW_3_4_SHIFT(ch) &
+			SYS_REG_ROW_3_4_MASK;
+		chipsize_mb = (1 << (cs0_row + col + bk + bw - 20));
+
+		if (rank > 1)
+			chipsize_mb += chipsize_mb >>
+				(cs0_row - cs1_row);
+		if (row_3_4)
+			chipsize_mb = chipsize_mb * 3 / 4;
+		size_mb += chipsize_mb;
+	}
+
+	/* there can be no more than 2gb of memory */
+	size_mb = min(size_mb, 0x80000000 >> 20);
+
+	return size_mb;
+}
+
+#ifdef CONFIG_SPL_BUILD
+static int setup_sdram(struct udevice *dev)
+{
+	struct dram_info *priv = dev_get_priv(dev);
+	struct rk3188_sdram_params *params = dev_get_platdata(dev);
+
+	return sdram_init(priv, params);
+}
+
+static int rk3188_dmc_ofdata_to_platdata(struct udevice *dev)
+{
+#if !CONFIG_IS_ENABLED(OF_PLATDATA)
+	struct rk3188_sdram_params *params = dev_get_platdata(dev);
+	const void *blob = gd->fdt_blob;
+	int node = dev->of_offset;
+	int ret;
+
+	/* rk3188 supports only one-channel */
+	params->num_channels = 1;
+	ret = fdtdec_get_int_array(blob, node, "rockchip,pctl-timing",
+				   (u32 *)&params->pctl_timing,
+				   sizeof(params->pctl_timing) / sizeof(u32));
+	if (ret) {
+		printf("%s: Cannot read rockchip,pctl-timing\n", __func__);
+		return -EINVAL;
+	}
+	ret = fdtdec_get_int_array(blob, node, "rockchip,phy-timing",
+				   (u32 *)&params->phy_timing,
+				   sizeof(params->phy_timing) / sizeof(u32));
+	if (ret) {
+		printf("%s: Cannot read rockchip,phy-timing\n", __func__);
+		return -EINVAL;
+	}
+	ret = fdtdec_get_int_array(blob, node, "rockchip,sdram-params",
+				   (u32 *)&params->base,
+				   sizeof(params->base) / sizeof(u32));
+	if (ret) {
+		printf("%s: Cannot read rockchip,sdram-params\n", __func__);
+		return -EINVAL;
+	}
+	ret = regmap_init_mem(dev, &params->map);
+	if (ret)
+		return ret;
+#endif
+
+	return 0;
+}
+#endif /* CONFIG_SPL_BUILD */
+
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+static int conv_of_platdata(struct udevice *dev)
+{
+	struct rk3188_sdram_params *plat = dev_get_platdata(dev);
+	struct dtd_rockchip_rk3188_dmc *of_plat = &plat->of_plat;
+	int ret;
+
+	memcpy(&plat->pctl_timing, of_plat->rockchip_pctl_timing,
+	       sizeof(plat->pctl_timing));
+	memcpy(&plat->phy_timing, of_plat->rockchip_phy_timing,
+	       sizeof(plat->phy_timing));
+	memcpy(&plat->base, of_plat->rockchip_sdram_params, sizeof(plat->base));
+	/* rk3188 supports dual-channel, set default channel num to 2 */
+	plat->num_channels = 1;
+	ret = regmap_init_mem_platdata(dev, of_plat->reg,
+				       ARRAY_SIZE(of_plat->reg) / 2,
+				       &plat->map);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+#endif
+
+static int rk3188_dmc_probe(struct udevice *dev)
+{
+#ifdef CONFIG_SPL_BUILD
+	struct rk3188_sdram_params *plat = dev_get_platdata(dev);
+#endif
+	struct dram_info *priv = dev_get_priv(dev);
+	struct regmap *map;
+	int ret;
+	struct udevice *dev_clk;
+
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+	ret = conv_of_platdata(dev);
+	if (ret)
+		return ret;
+#endif
+	map = syscon_get_regmap_by_driver_data(ROCKCHIP_SYSCON_NOC);
+	if (IS_ERR(map))
+		return PTR_ERR(map);
+	priv->chan[0].msch = regmap_get_range(map, 0);
+
+	priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
+	priv->pmu = syscon_get_first_range(ROCKCHIP_SYSCON_PMU);
+
+#ifdef CONFIG_SPL_BUILD
+	priv->chan[0].pctl = regmap_get_range(plat->map, 0);
+	priv->chan[0].publ = regmap_get_range(plat->map, 1);
+#endif
+
+	ret = rockchip_get_clk(&dev_clk);
+	if (ret)
+		return ret;
+	priv->ddr_clk.id = CLK_DDR;
+	ret = clk_request(dev_clk, &priv->ddr_clk);
+	if (ret)
+		return ret;
+
+	priv->cru = rockchip_get_cru();
+	if (IS_ERR(priv->cru))
+		return PTR_ERR(priv->cru);
+#ifdef CONFIG_SPL_BUILD
+	ret = setup_sdram(dev);
+	if (ret)
+		return ret;
+#endif
+	priv->info.base = 0;
+	priv->info.size = sdram_size_mb(priv->pmu) << 20;
+
+	return 0;
+}
+
+static int rk3188_dmc_get_info(struct udevice *dev, struct ram_info *info)
+{
+	struct dram_info *priv = dev_get_priv(dev);
+
+	*info = priv->info;
+
+	return 0;
+}
+
+static struct ram_ops rk3188_dmc_ops = {
+	.get_info = rk3188_dmc_get_info,
+};
+
+static const struct udevice_id rk3188_dmc_ids[] = {
+	{ .compatible = "rockchip,rk3188-dmc" },
+	{ }
+};
+
+U_BOOT_DRIVER(dmc_rk3188) = {
+	.name = "rockchip_rk3188_dmc",
+	.id = UCLASS_RAM,
+	.of_match = rk3188_dmc_ids,
+	.ops = &rk3188_dmc_ops,
+#ifdef CONFIG_SPL_BUILD
+	.ofdata_to_platdata = rk3188_dmc_ofdata_to_platdata,
+#endif
+	.probe = rk3188_dmc_probe,
+	.priv_auto_alloc_size = sizeof(struct dram_info),
+#ifdef CONFIG_SPL_BUILD
+	.platdata_auto_alloc_size = sizeof(struct rk3188_sdram_params),
+#endif
+};