i.MX28: Move SPL to arch/arm/cpu/arm926ejs/mx28

This moves SPL to common location so it can be reused by multiple boards. Also,
this commit adjusts M28 SoM to avoid breakage due to the move.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Detlev Zundel <dzu@denx.de>
Cc: Stefano Babic <sbabic@denx.de>

7 files changed, 6 insertions, 1581 deletions

diff --git a/board/denx/m28evk/Makefile b/board/denx/m28evk/Makefile
index b6f002f..aa16c7d 100644
--- a/board/denx/m28evk/Makefile
+++ b/board/denx/m28evk/Makefile
@@ -27,10 +27,8 @@ LIB	= $(obj)lib$(BOARD).o
 
 ifndef	CONFIG_SPL_BUILD
 COBJS	:= m28evk.o
-endif
-
-ifdef	CONFIG_SPL_BUILD
-COBJS	:= mem_init.o mmc_boot.o power_init.o memsize.o
+else
+COBJS	:= spl_boot.o
 endif
 
 SRCS	:= $(COBJS:.o=.c)
@@ -41,11 +39,6 @@ $(LIB):	$(obj).depend $(OBJS)
 
 all:	$(ALL)
 
-ifdef	CONFIG_SPL_BUILD
-memsize.c:
-	ln -sf $(TOPDIR)/common/memsize.c $@
-endif
-
 #########################################################################
 
 # defines $(obj).depend target
diff --git a/board/denx/m28evk/m28_init.h b/board/denx/m28evk/m28_init.h
deleted file mode 100644
index 98d3631..0000000
--- a/board/denx/m28evk/m28_init.h
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- * Freescale i.MX28 SPL functions
- *
- * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
- * on behalf of DENX Software Engineering GmbH
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#ifndef	__M28_INIT_H__
-#define	__M28_INIT_H__
-
-void early_delay(int delay);
-
-void mx28_power_init(void);
-
-#ifdef	CONFIG_SPL_MX28_PSWITCH_WAIT
-void mx28_power_wait_pswitch(void);
-#else
-static inline void mx28_power_wait_pswitch(void) { }
-#endif
-
-void mx28_mem_init(void);
-
-#endif	/* __M28_INIT_H__ */
diff --git a/board/denx/m28evk/mem_init.c b/board/denx/m28evk/mem_init.c
deleted file mode 100644
index 17d1f9b..0000000
--- a/board/denx/m28evk/mem_init.c
+++ /dev/null
@@ -1,240 +0,0 @@
-/*
- * Freescale i.MX28 RAM init
- *
- * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
- * on behalf of DENX Software Engineering GmbH
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <common.h>
-#include <config.h>
-#include <asm/io.h>
-#include <asm/arch/iomux-mx28.h>
-#include <asm/arch/imx-regs.h>
-
-#include "m28_init.h"
-
-uint32_t dram_vals[] = {
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000100, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00010101, 0x01010101, 0x000f0f01, 0x0f02020a,
-	0x00000000, 0x00010101, 0x00000100, 0x00000100, 0x00000000,
-	0x00000002, 0x01010000, 0x05060302, 0x06005003, 0x0a0000c8,
-	0x02009c40, 0x0000030c, 0x0036a609, 0x031a0612, 0x02030202,
-	0x00c8001c, 0x00000000, 0x00000000, 0x00012100, 0xffff0303,
-	0x00012100, 0xffff0303, 0x00012100, 0xffff0303, 0x00012100,
-	0xffff0303, 0x00000003, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000612, 0x01000F02, 0x06120612, 0x00000200,
-	0x00020007, 0xf5014b27, 0xf5014b27, 0xf5014b27, 0xf5014b27,
-	0x07000300, 0x07000300, 0x07000300, 0x07000300, 0x00000006,
-	0x00000000, 0x00000000, 0x01000000, 0x01020408, 0x08040201,
-	0x000f1133, 0x00000000, 0x00001f04, 0x00001f04, 0x00001f04,
-	0x00001f04, 0x00001f04, 0x00001f04, 0x00001f04, 0x00001f04,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00010000, 0x00020304, 0x00000004,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x01010000, 0x01000000, 0x03030000, 0x00010303,
-	0x01020202, 0x00000000, 0x02040303, 0x21002103, 0x00061200,
-	0x06120612, 0x04320432, 0x04320432, 0x00040004, 0x00040004,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00010001
-};
-
-void init_m28_200mhz_ddr2(void)
-{
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(dram_vals); i++)
-		writel(dram_vals[i], MXS_DRAM_BASE + (4 * i));
-}
-
-void mx28_mem_init_clock(void)
-{
-	struct mx28_clkctrl_regs *clkctrl_regs =
-		(struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE;
-
-	/* Gate EMI clock */
-	writel(CLKCTRL_FRAC0_CLKGATEEMI,
-		&clkctrl_regs->hw_clkctrl_frac0_set);
-
-	/* EMI = 205MHz */
-	writel(CLKCTRL_FRAC0_EMIFRAC_MASK,
-		&clkctrl_regs->hw_clkctrl_frac0_set);
-	writel((0x2a << CLKCTRL_FRAC0_EMIFRAC_OFFSET) &
-		CLKCTRL_FRAC0_EMIFRAC_MASK,
-		&clkctrl_regs->hw_clkctrl_frac0_clr);
-
-	/* Ungate EMI clock */
-	writel(CLKCTRL_FRAC0_CLKGATEEMI,
-		&clkctrl_regs->hw_clkctrl_frac0_clr);
-
-	early_delay(11000);
-
-	writel((2 << CLKCTRL_EMI_DIV_EMI_OFFSET) |
-		(1 << CLKCTRL_EMI_DIV_XTAL_OFFSET),
-		&clkctrl_regs->hw_clkctrl_emi);
-
-	/* Unbypass EMI */
-	writel(CLKCTRL_CLKSEQ_BYPASS_EMI,
-		&clkctrl_regs->hw_clkctrl_clkseq_clr);
-
-	early_delay(10000);
-}
-
-void mx28_mem_setup_cpu_and_hbus(void)
-{
-	struct mx28_clkctrl_regs *clkctrl_regs =
-		(struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE;
-
-	/* CPU = 454MHz and ungate CPU clock */
-	clrsetbits_le32(&clkctrl_regs->hw_clkctrl_frac0,
-		CLKCTRL_FRAC0_CPUFRAC_MASK | CLKCTRL_FRAC0_CLKGATECPU,
-		19 << CLKCTRL_FRAC0_CPUFRAC_OFFSET);
-
-	/* Set CPU bypass */
-	writel(CLKCTRL_CLKSEQ_BYPASS_CPU,
-		&clkctrl_regs->hw_clkctrl_clkseq_set);
-
-	/* HBUS = 151MHz */
-	writel(CLKCTRL_HBUS_DIV_MASK, &clkctrl_regs->hw_clkctrl_hbus_set);
-	writel(((~3) << CLKCTRL_HBUS_DIV_OFFSET) & CLKCTRL_HBUS_DIV_MASK,
-		&clkctrl_regs->hw_clkctrl_hbus_clr);
-
-	early_delay(10000);
-
-	/* CPU clock divider = 1 */
-	clrsetbits_le32(&clkctrl_regs->hw_clkctrl_cpu,
-			CLKCTRL_CPU_DIV_CPU_MASK, 1);
-
-	/* Disable CPU bypass */
-	writel(CLKCTRL_CLKSEQ_BYPASS_CPU,
-		&clkctrl_regs->hw_clkctrl_clkseq_clr);
-}
-
-void mx28_mem_setup_vdda(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-
-	writel((0xc << POWER_VDDACTRL_TRG_OFFSET) |
-		(0x7 << POWER_VDDACTRL_BO_OFFSET_OFFSET) |
-		POWER_VDDACTRL_LINREG_OFFSET_1STEPS_BELOW,
-		&power_regs->hw_power_vddactrl);
-}
-
-void mx28_mem_setup_vddd(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-
-	writel((0x1c << POWER_VDDDCTRL_TRG_OFFSET) |
-		(0x7 << POWER_VDDDCTRL_BO_OFFSET_OFFSET) |
-		POWER_VDDDCTRL_LINREG_OFFSET_1STEPS_BELOW,
-		&power_regs->hw_power_vdddctrl);
-}
-
-#define	HW_DIGCTRL_SCRATCH0	0x8001c280
-#define	HW_DIGCTRL_SCRATCH1	0x8001c290
-void data_abort_memdetect_handler(void) __attribute__((naked));
-void data_abort_memdetect_handler(void)
-{
-	asm volatile("subs pc, r14, #4");
-}
-
-void mx28_mem_get_size(void)
-{
-	uint32_t sz, da;
-	uint32_t *vt = (uint32_t *)0x20;
-
-	/* Replace the DABT handler. */
-	da = vt[4];
-	vt[4] = (uint32_t)&data_abort_memdetect_handler;
-
-	sz = get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE);
-	writel(sz, HW_DIGCTRL_SCRATCH0);
-	writel(sz, HW_DIGCTRL_SCRATCH1);
-
-	/* Restore the old DABT handler. */
-	vt[4] = da;
-}
-
-void mx28_mem_init(void)
-{
-	struct mx28_clkctrl_regs *clkctrl_regs =
-		(struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE;
-	struct mx28_pinctrl_regs *pinctrl_regs =
-		(struct mx28_pinctrl_regs *)MXS_PINCTRL_BASE;
-
-	/* Set DDR2 mode */
-	writel(PINCTRL_EMI_DS_CTRL_DDR_MODE_DDR2,
-		&pinctrl_regs->hw_pinctrl_emi_ds_ctrl_set);
-
-	/* Power up PLL0 */
-	writel(CLKCTRL_PLL0CTRL0_POWER,
-		&clkctrl_regs->hw_clkctrl_pll0ctrl0_set);
-
-	early_delay(11000);
-
-	mx28_mem_init_clock();
-
-	mx28_mem_setup_vdda();
-
-	/*
-	 * Configure the DRAM registers
-	 */
-
-	/* Clear START bit from DRAM_CTL16 */
-	clrbits_le32(MXS_DRAM_BASE + 0x40, 1);
-
-	init_m28_200mhz_ddr2();
-
-	/* Clear SREFRESH bit from DRAM_CTL17 */
-	clrbits_le32(MXS_DRAM_BASE + 0x44, 1);
-
-	/* Set START bit in DRAM_CTL16 */
-	setbits_le32(MXS_DRAM_BASE + 0x40, 1);
-
-	/* Wait for bit 20 (DRAM init complete) in DRAM_CTL58 */
-	while (!(readl(MXS_DRAM_BASE + 0xe8) & (1 << 20)))
-		;
-
-	mx28_mem_setup_vddd();
-
-	early_delay(10000);
-
-	mx28_mem_setup_cpu_and_hbus();
-
-	mx28_mem_get_size();
-}
diff --git a/board/denx/m28evk/power_init.c b/board/denx/m28evk/power_init.c
deleted file mode 100644
index 27322b4..0000000
--- a/board/denx/m28evk/power_init.c
+++ /dev/null
@@ -1,913 +0,0 @@
-/*
- * Freescale i.MX28 Boot PMIC init
- *
- * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
- * on behalf of DENX Software Engineering GmbH
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <common.h>
-#include <config.h>
-#include <asm/io.h>
-#include <asm/arch/imx-regs.h>
-
-#include "m28_init.h"
-
-void mx28_power_clock2xtal(void)
-{
-	struct mx28_clkctrl_regs *clkctrl_regs =
-		(struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE;
-
-	/* Set XTAL as CPU reference clock */
-	writel(CLKCTRL_CLKSEQ_BYPASS_CPU,
-		&clkctrl_regs->hw_clkctrl_clkseq_set);
-}
-
-void mx28_power_clock2pll(void)
-{
-	struct mx28_clkctrl_regs *clkctrl_regs =
-		(struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE;
-
-	writel(CLKCTRL_PLL0CTRL0_POWER,
-		&clkctrl_regs->hw_clkctrl_pll0ctrl0_set);
-	early_delay(100);
-	writel(CLKCTRL_CLKSEQ_BYPASS_CPU,
-		&clkctrl_regs->hw_clkctrl_clkseq_clr);
-}
-
-void mx28_power_clear_auto_restart(void)
-{
-	struct mx28_rtc_regs *rtc_regs =
-		(struct mx28_rtc_regs *)MXS_RTC_BASE;
-
-	writel(RTC_CTRL_SFTRST, &rtc_regs->hw_rtc_ctrl_clr);
-	while (readl(&rtc_regs->hw_rtc_ctrl) & RTC_CTRL_SFTRST)
-		;
-
-	writel(RTC_CTRL_CLKGATE, &rtc_regs->hw_rtc_ctrl_clr);
-	while (readl(&rtc_regs->hw_rtc_ctrl) & RTC_CTRL_CLKGATE)
-		;
-
-	/*
-	 * Due to the hardware design bug of mx28 EVK-A
-	 * we need to set the AUTO_RESTART bit.
-	 */
-	if (readl(&rtc_regs->hw_rtc_persistent0) & RTC_PERSISTENT0_AUTO_RESTART)
-		return;
-
-	while (readl(&rtc_regs->hw_rtc_stat) & RTC_STAT_NEW_REGS_MASK)
-		;
-
-	setbits_le32(&rtc_regs->hw_rtc_persistent0,
-			RTC_PERSISTENT0_AUTO_RESTART);
-	writel(RTC_CTRL_FORCE_UPDATE, &rtc_regs->hw_rtc_ctrl_set);
-	writel(RTC_CTRL_FORCE_UPDATE, &rtc_regs->hw_rtc_ctrl_clr);
-	while (readl(&rtc_regs->hw_rtc_stat) & RTC_STAT_NEW_REGS_MASK)
-		;
-	while (readl(&rtc_regs->hw_rtc_stat) & RTC_STAT_STALE_REGS_MASK)
-		;
-}
-
-void mx28_power_set_linreg(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-
-	/* Set linear regulator 25mV below switching converter */
-	clrsetbits_le32(&power_regs->hw_power_vdddctrl,
-			POWER_VDDDCTRL_LINREG_OFFSET_MASK,
-			POWER_VDDDCTRL_LINREG_OFFSET_1STEPS_BELOW);
-
-	clrsetbits_le32(&power_regs->hw_power_vddactrl,
-			POWER_VDDACTRL_LINREG_OFFSET_MASK,
-			POWER_VDDACTRL_LINREG_OFFSET_1STEPS_BELOW);
-
-	clrsetbits_le32(&power_regs->hw_power_vddioctrl,
-			POWER_VDDIOCTRL_LINREG_OFFSET_MASK,
-			POWER_VDDIOCTRL_LINREG_OFFSET_1STEPS_BELOW);
-}
-
-void mx28_power_setup_5v_detect(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-
-	/* Start 5V detection */
-	clrsetbits_le32(&power_regs->hw_power_5vctrl,
-			POWER_5VCTRL_VBUSVALID_TRSH_MASK,
-			POWER_5VCTRL_VBUSVALID_TRSH_4V4 |
-			POWER_5VCTRL_PWRUP_VBUS_CMPS);
-}
-
-void mx28_src_power_init(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-
-	/* Improve efficieny and reduce transient ripple */
-	writel(POWER_LOOPCTRL_TOGGLE_DIF | POWER_LOOPCTRL_EN_CM_HYST |
-		POWER_LOOPCTRL_EN_DF_HYST, &power_regs->hw_power_loopctrl_set);
-
-	clrsetbits_le32(&power_regs->hw_power_dclimits,
-			POWER_DCLIMITS_POSLIMIT_BUCK_MASK,
-			0x30 << POWER_DCLIMITS_POSLIMIT_BUCK_OFFSET);
-
-	setbits_le32(&power_regs->hw_power_battmonitor,
-			POWER_BATTMONITOR_EN_BATADJ);
-
-	/* Increase the RCSCALE level for quick DCDC response to dynamic load */
-	clrsetbits_le32(&power_regs->hw_power_loopctrl,
-			POWER_LOOPCTRL_EN_RCSCALE_MASK,
-			POWER_LOOPCTRL_RCSCALE_THRESH |
-			POWER_LOOPCTRL_EN_RCSCALE_8X);
-
-	clrsetbits_le32(&power_regs->hw_power_minpwr,
-			POWER_MINPWR_HALFFETS, POWER_MINPWR_DOUBLE_FETS);
-
-	/* 5V to battery handoff ... FIXME */
-	setbits_le32(&power_regs->hw_power_5vctrl, POWER_5VCTRL_DCDC_XFER);
-	early_delay(30);
-	clrbits_le32(&power_regs->hw_power_5vctrl, POWER_5VCTRL_DCDC_XFER);
-}
-
-void mx28_power_init_4p2_params(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-
-	/* Setup 4P2 parameters */
-	clrsetbits_le32(&power_regs->hw_power_dcdc4p2,
-		POWER_DCDC4P2_CMPTRIP_MASK | POWER_DCDC4P2_TRG_MASK,
-		POWER_DCDC4P2_TRG_4V2 | (31 << POWER_DCDC4P2_CMPTRIP_OFFSET));
-
-	clrsetbits_le32(&power_regs->hw_power_5vctrl,
-		POWER_5VCTRL_HEADROOM_ADJ_MASK,
-		0x4 << POWER_5VCTRL_HEADROOM_ADJ_OFFSET);
-
-	clrsetbits_le32(&power_regs->hw_power_dcdc4p2,
-		POWER_DCDC4P2_DROPOUT_CTRL_MASK,
-		POWER_DCDC4P2_DROPOUT_CTRL_100MV |
-		POWER_DCDC4P2_DROPOUT_CTRL_SRC_SEL);
-
-	clrsetbits_le32(&power_regs->hw_power_5vctrl,
-		POWER_5VCTRL_CHARGE_4P2_ILIMIT_MASK,
-		0x3f << POWER_5VCTRL_CHARGE_4P2_ILIMIT_OFFSET);
-}
-
-void mx28_enable_4p2_dcdc_input(int xfer)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-	uint32_t tmp, vbus_thresh, vbus_5vdetect, pwd_bo;
-	uint32_t prev_5v_brnout, prev_5v_droop;
-
-	prev_5v_brnout = readl(&power_regs->hw_power_5vctrl) &
-				POWER_5VCTRL_PWDN_5VBRNOUT;
-	prev_5v_droop = readl(&power_regs->hw_power_ctrl) &
-				POWER_CTRL_ENIRQ_VDD5V_DROOP;
-
-	clrbits_le32(&power_regs->hw_power_5vctrl, POWER_5VCTRL_PWDN_5VBRNOUT);
-	writel(POWER_RESET_UNLOCK_KEY | POWER_RESET_PWD_OFF,
-		&power_regs->hw_power_reset);
-
-	clrbits_le32(&power_regs->hw_power_ctrl, POWER_CTRL_ENIRQ_VDD5V_DROOP);
-
-	if (xfer && (readl(&power_regs->hw_power_5vctrl) &
-			POWER_5VCTRL_ENABLE_DCDC)) {
-		return;
-	}
-
-	/*
-	 * Recording orignal values that will be modified temporarlily
-	 * to handle a chip bug. See chip errata for CQ ENGR00115837
-	 */
-	tmp = readl(&power_regs->hw_power_5vctrl);
-	vbus_thresh = tmp & POWER_5VCTRL_VBUSVALID_TRSH_MASK;
-	vbus_5vdetect = tmp & POWER_5VCTRL_VBUSVALID_5VDETECT;
-
-	pwd_bo = readl(&power_regs->hw_power_minpwr) & POWER_MINPWR_PWD_BO;
-
-	/*
-	 * Disable mechanisms that get erroneously tripped by when setting
-	 * the DCDC4P2 EN_DCDC
-	 */
-	clrbits_le32(&power_regs->hw_power_5vctrl,
-		POWER_5VCTRL_VBUSVALID_5VDETECT |
-		POWER_5VCTRL_VBUSVALID_TRSH_MASK);
-
-	writel(POWER_MINPWR_PWD_BO, &power_regs->hw_power_minpwr_set);
-
-	if (xfer) {
-		setbits_le32(&power_regs->hw_power_5vctrl,
-				POWER_5VCTRL_DCDC_XFER);
-		early_delay(20);
-		clrbits_le32(&power_regs->hw_power_5vctrl,
-				POWER_5VCTRL_DCDC_XFER);
-
-		setbits_le32(&power_regs->hw_power_5vctrl,
-				POWER_5VCTRL_ENABLE_DCDC);
-	} else {
-		setbits_le32(&power_regs->hw_power_dcdc4p2,
-				POWER_DCDC4P2_ENABLE_DCDC);
-	}
-
-	early_delay(25);
-
-	clrsetbits_le32(&power_regs->hw_power_5vctrl,
-			POWER_5VCTRL_VBUSVALID_TRSH_MASK, vbus_thresh);
-
-	if (vbus_5vdetect)
-		writel(vbus_5vdetect, &power_regs->hw_power_5vctrl_set);
-
-	if (!pwd_bo)
-		clrbits_le32(&power_regs->hw_power_minpwr, POWER_MINPWR_PWD_BO);
-
-	while (readl(&power_regs->hw_power_ctrl) & POWER_CTRL_VBUS_VALID_IRQ)
-		clrbits_le32(&power_regs->hw_power_ctrl,
-				POWER_CTRL_VBUS_VALID_IRQ);
-
-	if (prev_5v_brnout) {
-		writel(POWER_5VCTRL_PWDN_5VBRNOUT,
-			&power_regs->hw_power_5vctrl_set);
-		writel(POWER_RESET_UNLOCK_KEY,
-			&power_regs->hw_power_reset);
-	} else {
-		writel(POWER_5VCTRL_PWDN_5VBRNOUT,
-			&power_regs->hw_power_5vctrl_clr);
-		writel(POWER_RESET_UNLOCK_KEY | POWER_RESET_PWD_OFF,
-			&power_regs->hw_power_reset);
-	}
-
-	while (readl(&power_regs->hw_power_ctrl) & POWER_CTRL_VDD5V_DROOP_IRQ)
-		clrbits_le32(&power_regs->hw_power_ctrl,
-				POWER_CTRL_VDD5V_DROOP_IRQ);
-
-	if (prev_5v_droop)
-		clrbits_le32(&power_regs->hw_power_ctrl,
-				POWER_CTRL_ENIRQ_VDD5V_DROOP);
-	else
-		setbits_le32(&power_regs->hw_power_ctrl,
-				POWER_CTRL_ENIRQ_VDD5V_DROOP);
-}
-
-void mx28_power_init_4p2_regulator(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-	uint32_t tmp, tmp2;
-
-	setbits_le32(&power_regs->hw_power_dcdc4p2, POWER_DCDC4P2_ENABLE_4P2);
-
-	writel(POWER_CHARGE_ENABLE_LOAD, &power_regs->hw_power_charge_set);
-
-	writel(POWER_5VCTRL_CHARGE_4P2_ILIMIT_MASK,
-		&power_regs->hw_power_5vctrl_clr);
-	clrbits_le32(&power_regs->hw_power_dcdc4p2, POWER_DCDC4P2_TRG_MASK);
-
-	/* Power up the 4p2 rail and logic/control */
-	writel(POWER_5VCTRL_PWD_CHARGE_4P2_MASK,
-		&power_regs->hw_power_5vctrl_clr);
-
-	/*
-	 * Start charging up the 4p2 capacitor. We ramp of this charge
-	 * gradually to avoid large inrush current from the 5V cable which can
-	 * cause transients/problems
-	 */
-	mx28_enable_4p2_dcdc_input(0);
-
-	if (readl(&power_regs->hw_power_ctrl) & POWER_CTRL_VBUS_VALID_IRQ) {
-		/*
-		 * If we arrived here, we were unable to recover from mx23 chip
-		 * errata 5837. 4P2 is disabled and sufficient battery power is
-		 * not present. Exiting to not enable DCDC power during 5V
-		 * connected state.
-		 */
-		clrbits_le32(&power_regs->hw_power_dcdc4p2,
-			POWER_DCDC4P2_ENABLE_DCDC);
-		writel(POWER_5VCTRL_PWD_CHARGE_4P2_MASK,
-			&power_regs->hw_power_5vctrl_set);
-		hang();
-	}
-
-	/*
-	 * Here we set the 4p2 brownout level to something very close to 4.2V.
-	 * We then check the brownout status. If the brownout status is false,
-	 * the voltage is already close to the target voltage of 4.2V so we
-	 * can go ahead and set the 4P2 current limit to our max target limit.
-	 * If the brownout status is true, we need to ramp us the current limit
-	 * so that we don't cause large inrush current issues. We step up the
-	 * current limit until the brownout status is false or until we've
-	 * reached our maximum defined 4p2 current limit.
-	 */
-	clrsetbits_le32(&power_regs->hw_power_dcdc4p2,
-			POWER_DCDC4P2_BO_MASK,
-			22 << POWER_DCDC4P2_BO_OFFSET);	/* 4.15V */
-
-	if (!(readl(&power_regs->hw_power_sts) & POWER_STS_DCDC_4P2_BO)) {
-		setbits_le32(&power_regs->hw_power_5vctrl,
-			0x3f << POWER_5VCTRL_CHARGE_4P2_ILIMIT_OFFSET);
-	} else {
-		tmp = (readl(&power_regs->hw_power_5vctrl) &
-			POWER_5VCTRL_CHARGE_4P2_ILIMIT_MASK) >>
-			POWER_5VCTRL_CHARGE_4P2_ILIMIT_OFFSET;
-		while (tmp < 0x3f) {
-			if (!(readl(&power_regs->hw_power_sts) &
-					POWER_STS_DCDC_4P2_BO)) {
-				tmp = readl(&power_regs->hw_power_5vctrl);
-				tmp |= POWER_5VCTRL_CHARGE_4P2_ILIMIT_MASK;
-				early_delay(100);
-				writel(tmp, &power_regs->hw_power_5vctrl);
-				break;
-			} else {
-				tmp++;
-				tmp2 = readl(&power_regs->hw_power_5vctrl);
-				tmp2 &= ~POWER_5VCTRL_CHARGE_4P2_ILIMIT_MASK;
-				tmp2 |= tmp <<
-					POWER_5VCTRL_CHARGE_4P2_ILIMIT_OFFSET;
-				writel(tmp2, &power_regs->hw_power_5vctrl);
-				early_delay(100);
-			}
-		}
-	}
-
-	clrbits_le32(&power_regs->hw_power_dcdc4p2, POWER_DCDC4P2_BO_MASK);
-	writel(POWER_CTRL_DCDC4P2_BO_IRQ, &power_regs->hw_power_ctrl_clr);
-}
-
-void mx28_power_init_dcdc_4p2_source(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-
-	if (!(readl(&power_regs->hw_power_dcdc4p2) &
-		POWER_DCDC4P2_ENABLE_DCDC)) {
-		hang();
-	}
-
-	mx28_enable_4p2_dcdc_input(1);
-
-	if (readl(&power_regs->hw_power_ctrl) & POWER_CTRL_VBUS_VALID_IRQ) {
-		clrbits_le32(&power_regs->hw_power_dcdc4p2,
-			POWER_DCDC4P2_ENABLE_DCDC);
-		writel(POWER_5VCTRL_ENABLE_DCDC,
-			&power_regs->hw_power_5vctrl_clr);
-		writel(POWER_5VCTRL_PWD_CHARGE_4P2_MASK,
-			&power_regs->hw_power_5vctrl_set);
-	}
-}
-
-void mx28_power_enable_4p2(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-	uint32_t vdddctrl, vddactrl, vddioctrl;
-	uint32_t tmp;
-
-	vdddctrl = readl(&power_regs->hw_power_vdddctrl);
-	vddactrl = readl(&power_regs->hw_power_vddactrl);
-	vddioctrl = readl(&power_regs->hw_power_vddioctrl);
-
-	setbits_le32(&power_regs->hw_power_vdddctrl,
-		POWER_VDDDCTRL_DISABLE_FET | POWER_VDDDCTRL_ENABLE_LINREG |
-		POWER_VDDDCTRL_PWDN_BRNOUT);
-
-	setbits_le32(&power_regs->hw_power_vddactrl,
-		POWER_VDDACTRL_DISABLE_FET | POWER_VDDACTRL_ENABLE_LINREG |
-		POWER_VDDACTRL_PWDN_BRNOUT);
-
-	setbits_le32(&power_regs->hw_power_vddioctrl,
-		POWER_VDDIOCTRL_DISABLE_FET | POWER_VDDIOCTRL_PWDN_BRNOUT);
-
-	mx28_power_init_4p2_params();
-	mx28_power_init_4p2_regulator();
-
-	/* Shutdown battery (none present) */
-	clrbits_le32(&power_regs->hw_power_dcdc4p2, POWER_DCDC4P2_BO_MASK);
-	writel(POWER_CTRL_DCDC4P2_BO_IRQ, &power_regs->hw_power_ctrl_clr);
-	writel(POWER_CTRL_ENIRQ_DCDC4P2_BO, &power_regs->hw_power_ctrl_clr);
-
-	mx28_power_init_dcdc_4p2_source();
-
-	writel(vdddctrl, &power_regs->hw_power_vdddctrl);
-	early_delay(20);
-	writel(vddactrl, &power_regs->hw_power_vddactrl);
-	early_delay(20);
-	writel(vddioctrl, &power_regs->hw_power_vddioctrl);
-
-	/*
-	 * Check if FET is enabled on either powerout and if so,
-	 * disable load.
-	 */
-	tmp = 0;
-	tmp |= !(readl(&power_regs->hw_power_vdddctrl) &
-			POWER_VDDDCTRL_DISABLE_FET);
-	tmp |= !(readl(&power_regs->hw_power_vddactrl) &
-			POWER_VDDACTRL_DISABLE_FET);
-	tmp |= !(readl(&power_regs->hw_power_vddioctrl) &
-			POWER_VDDIOCTRL_DISABLE_FET);
-	if (tmp)
-		writel(POWER_CHARGE_ENABLE_LOAD,
-			&power_regs->hw_power_charge_clr);
-}
-
-void mx28_boot_valid_5v(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-
-	/*
-	 * Use VBUSVALID level instead of VDD5V_GT_VDDIO level to trigger a 5V
-	 * disconnect event. FIXME
-	 */
-	writel(POWER_5VCTRL_VBUSVALID_5VDETECT,
-		&power_regs->hw_power_5vctrl_set);
-
-	/* Configure polarity to check for 5V disconnection. */
-	writel(POWER_CTRL_POLARITY_VBUSVALID |
-		POWER_CTRL_POLARITY_VDD5V_GT_VDDIO,
-		&power_regs->hw_power_ctrl_clr);
-
-	writel(POWER_CTRL_VBUS_VALID_IRQ | POWER_CTRL_VDD5V_GT_VDDIO_IRQ,
-		&power_regs->hw_power_ctrl_clr);
-
-	mx28_power_enable_4p2();
-}
-
-void mx28_powerdown(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-	writel(POWER_RESET_UNLOCK_KEY, &power_regs->hw_power_reset);
-	writel(POWER_RESET_UNLOCK_KEY | POWER_RESET_PWD_OFF,
-		&power_regs->hw_power_reset);
-}
-
-void mx28_handle_5v_conflict(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-	uint32_t tmp;
-
-	setbits_le32(&power_regs->hw_power_vddioctrl,
-			POWER_VDDIOCTRL_BO_OFFSET_MASK);
-
-	for (;;) {
-		tmp = readl(&power_regs->hw_power_sts);
-
-		if (tmp & POWER_STS_VDDIO_BO) {
-			mx28_powerdown();
-			break;
-		}
-
-		if (tmp & POWER_STS_VDD5V_GT_VDDIO) {
-			mx28_boot_valid_5v();
-			break;
-		} else {
-			mx28_powerdown();
-			break;
-		}
-	}
-}
-
-int mx28_get_batt_volt(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-	uint32_t volt = readl(&power_regs->hw_power_battmonitor);
-	volt &= POWER_BATTMONITOR_BATT_VAL_MASK;
-	volt >>= POWER_BATTMONITOR_BATT_VAL_OFFSET;
-	volt *= 8;
-	return volt;
-}
-
-int mx28_is_batt_ready(void)
-{
-	return (mx28_get_batt_volt() >= 3600);
-}
-
-void mx28_5v_boot(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-
-	/*
-	 * NOTE: In original IMX-Bootlets, this also checks for VBUSVALID,
-	 * but their implementation always returns 1 so we omit it here.
-	 */
-	if (readl(&power_regs->hw_power_sts) & POWER_STS_VDD5V_GT_VDDIO) {
-		mx28_boot_valid_5v();
-		return;
-	}
-
-	early_delay(1000);
-	if (readl(&power_regs->hw_power_sts) & POWER_STS_VDD5V_GT_VDDIO) {
-		mx28_boot_valid_5v();
-		return;
-	}
-
-	mx28_handle_5v_conflict();
-}
-
-void mx28_init_batt_bo(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-
-	/* Brownout at 3V */
-	clrsetbits_le32(&power_regs->hw_power_battmonitor,
-		POWER_BATTMONITOR_BRWNOUT_LVL_MASK,
-		15 << POWER_BATTMONITOR_BRWNOUT_LVL_OFFSET);
-
-	writel(POWER_CTRL_BATT_BO_IRQ, &power_regs->hw_power_ctrl_clr);
-	writel(POWER_CTRL_ENIRQ_BATT_BO, &power_regs->hw_power_ctrl_clr);
-}
-
-void mx28_switch_vddd_to_dcdc_source(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-
-	clrsetbits_le32(&power_regs->hw_power_vdddctrl,
-		POWER_VDDDCTRL_LINREG_OFFSET_MASK,
-		POWER_VDDDCTRL_LINREG_OFFSET_1STEPS_BELOW);
-
-	clrbits_le32(&power_regs->hw_power_vdddctrl,
-		POWER_VDDDCTRL_DISABLE_FET | POWER_VDDDCTRL_ENABLE_LINREG |
-		POWER_VDDDCTRL_DISABLE_STEPPING);
-}
-
-int mx28_is_batt_good(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-	uint32_t volt;
-
-	volt = readl(&power_regs->hw_power_battmonitor);
-	volt &= POWER_BATTMONITOR_BATT_VAL_MASK;
-	volt >>= POWER_BATTMONITOR_BATT_VAL_OFFSET;
-	volt *= 8;
-
-	if ((volt >= 2400) && (volt <= 4300))
-		return 1;
-
-	clrsetbits_le32(&power_regs->hw_power_5vctrl,
-		POWER_5VCTRL_CHARGE_4P2_ILIMIT_MASK,
-		0x3 << POWER_5VCTRL_CHARGE_4P2_ILIMIT_OFFSET);
-	writel(POWER_5VCTRL_PWD_CHARGE_4P2_MASK,
-		&power_regs->hw_power_5vctrl_clr);
-
-	clrsetbits_le32(&power_regs->hw_power_charge,
-		POWER_CHARGE_STOP_ILIMIT_MASK | POWER_CHARGE_BATTCHRG_I_MASK,
-		POWER_CHARGE_STOP_ILIMIT_10MA | 0x3);
-
-	writel(POWER_CHARGE_PWD_BATTCHRG, &power_regs->hw_power_charge_clr);
-	writel(POWER_5VCTRL_PWD_CHARGE_4P2_MASK,
-		&power_regs->hw_power_5vctrl_clr);
-
-	early_delay(500000);
-
-	volt = readl(&power_regs->hw_power_battmonitor);
-	volt &= POWER_BATTMONITOR_BATT_VAL_MASK;
-	volt >>= POWER_BATTMONITOR_BATT_VAL_OFFSET;
-	volt *= 8;
-
-	if (volt >= 3500)
-		return 0;
-
-	if (volt >= 2400)
-		return 1;
-
-	writel(POWER_CHARGE_STOP_ILIMIT_MASK | POWER_CHARGE_BATTCHRG_I_MASK,
-		&power_regs->hw_power_charge_clr);
-	writel(POWER_CHARGE_PWD_BATTCHRG, &power_regs->hw_power_charge_set);
-
-	return 0;
-}
-
-void mx28_power_configure_power_source(void)
-{
-	mx28_src_power_init();
-
-	mx28_5v_boot();
-	mx28_power_clock2pll();
-
-	mx28_init_batt_bo();
-	mx28_switch_vddd_to_dcdc_source();
-}
-
-void mx28_enable_output_rail_protection(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-
-	writel(POWER_CTRL_VDDD_BO_IRQ | POWER_CTRL_VDDA_BO_IRQ |
-		POWER_CTRL_VDDIO_BO_IRQ, &power_regs->hw_power_ctrl_clr);
-
-	setbits_le32(&power_regs->hw_power_vdddctrl,
-			POWER_VDDDCTRL_PWDN_BRNOUT);
-
-	setbits_le32(&power_regs->hw_power_vddactrl,
-			POWER_VDDACTRL_PWDN_BRNOUT);
-
-	setbits_le32(&power_regs->hw_power_vddioctrl,
-			POWER_VDDIOCTRL_PWDN_BRNOUT);
-}
-
-int mx28_get_vddio_power_source_off(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-	uint32_t tmp;
-
-	if (readl(&power_regs->hw_power_sts) & POWER_STS_VDD5V_GT_VDDIO) {
-		tmp = readl(&power_regs->hw_power_vddioctrl);
-		if (tmp & POWER_VDDIOCTRL_DISABLE_FET) {
-			if ((tmp & POWER_VDDIOCTRL_LINREG_OFFSET_MASK) ==
-				POWER_VDDDCTRL_LINREG_OFFSET_0STEPS) {
-				return 1;
-			}
-		}
-
-		if (!(readl(&power_regs->hw_power_5vctrl) &
-			POWER_5VCTRL_ENABLE_DCDC)) {
-			if ((tmp & POWER_VDDIOCTRL_LINREG_OFFSET_MASK) ==
-				POWER_VDDDCTRL_LINREG_OFFSET_0STEPS) {
-				return 1;
-			}
-		}
-	}
-
-	return 0;
-
-}
-
-int mx28_get_vddd_power_source_off(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-	uint32_t tmp;
-
-	tmp = readl(&power_regs->hw_power_vdddctrl);
-	if (tmp & POWER_VDDDCTRL_DISABLE_FET) {
-		if ((tmp & POWER_VDDDCTRL_LINREG_OFFSET_MASK) ==
-			POWER_VDDDCTRL_LINREG_OFFSET_0STEPS) {
-			return 1;
-		}
-	}
-
-	if (readl(&power_regs->hw_power_sts) & POWER_STS_VDD5V_GT_VDDIO) {
-		if (!(readl(&power_regs->hw_power_5vctrl) &
-			POWER_5VCTRL_ENABLE_DCDC)) {
-			return 1;
-		}
-	}
-
-	if (!(tmp & POWER_VDDDCTRL_ENABLE_LINREG)) {
-		if ((tmp & POWER_VDDDCTRL_LINREG_OFFSET_MASK) ==
-			POWER_VDDDCTRL_LINREG_OFFSET_1STEPS_BELOW) {
-			return 1;
-		}
-	}
-
-	return 0;
-}
-
-void mx28_power_set_vddio(uint32_t new_target, uint32_t new_brownout)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-	uint32_t cur_target, diff, bo_int = 0;
-	uint32_t powered_by_linreg = 0;
-
-	new_brownout = new_target - new_brownout;
-
-	cur_target = readl(&power_regs->hw_power_vddioctrl);
-	cur_target &= POWER_VDDIOCTRL_TRG_MASK;
-	cur_target *= 50;	/* 50 mV step*/
-	cur_target += 2800;	/* 2800 mV lowest */
-
-	powered_by_linreg = mx28_get_vddio_power_source_off();
-	if (new_target > cur_target) {
-
-		if (powered_by_linreg) {
-			bo_int = readl(&power_regs->hw_power_vddioctrl);
-			clrbits_le32(&power_regs->hw_power_vddioctrl,
-					POWER_CTRL_ENIRQ_VDDIO_BO);
-		}
-
-		setbits_le32(&power_regs->hw_power_vddioctrl,
-				POWER_VDDIOCTRL_BO_OFFSET_MASK);
-		do {
-			if (new_target - cur_target > 100)
-				diff = cur_target + 100;
-			else
-				diff = new_target;
-
-			diff -= 2800;
-			diff /= 50;
-
-			clrsetbits_le32(&power_regs->hw_power_vddioctrl,
-				POWER_VDDIOCTRL_TRG_MASK, diff);
-
-			if (powered_by_linreg)
-				early_delay(1500);
-			else {
-				while (!(readl(&power_regs->hw_power_sts) &
-					POWER_STS_DC_OK))
-					;
-
-			}
-
-			cur_target = readl(&power_regs->hw_power_vddioctrl);
-			cur_target &= POWER_VDDIOCTRL_TRG_MASK;
-			cur_target *= 50;	/* 50 mV step*/
-			cur_target += 2800;	/* 2800 mV lowest */
-		} while (new_target > cur_target);
-
-		if (powered_by_linreg) {
-			writel(POWER_CTRL_VDDIO_BO_IRQ,
-				&power_regs->hw_power_ctrl_clr);
-			if (bo_int & POWER_CTRL_ENIRQ_VDDIO_BO)
-				setbits_le32(&power_regs->hw_power_vddioctrl,
-						POWER_CTRL_ENIRQ_VDDIO_BO);
-		}
-	} else {
-		do {
-			if (cur_target - new_target > 100)
-				diff = cur_target - 100;
-			else
-				diff = new_target;
-
-			diff -= 2800;
-			diff /= 50;
-
-			clrsetbits_le32(&power_regs->hw_power_vddioctrl,
-				POWER_VDDIOCTRL_TRG_MASK, diff);
-
-			if (powered_by_linreg)
-				early_delay(1500);
-			else {
-				while (!(readl(&power_regs->hw_power_sts) &
-					POWER_STS_DC_OK))
-					;
-
-			}
-
-			cur_target = readl(&power_regs->hw_power_vddioctrl);
-			cur_target &= POWER_VDDIOCTRL_TRG_MASK;
-			cur_target *= 50;	/* 50 mV step*/
-			cur_target += 2800;	/* 2800 mV lowest */
-		} while (new_target < cur_target);
-	}
-
-	clrsetbits_le32(&power_regs->hw_power_vddioctrl,
-			POWER_VDDDCTRL_BO_OFFSET_MASK,
-			new_brownout << POWER_VDDDCTRL_BO_OFFSET_OFFSET);
-}
-
-void mx28_power_set_vddd(uint32_t new_target, uint32_t new_brownout)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-	uint32_t cur_target, diff, bo_int = 0;
-	uint32_t powered_by_linreg = 0;
-
-	new_brownout = new_target - new_brownout;
-
-	cur_target = readl(&power_regs->hw_power_vdddctrl);
-	cur_target &= POWER_VDDDCTRL_TRG_MASK;
-	cur_target *= 25;	/* 25 mV step*/
-	cur_target += 800;	/* 800 mV lowest */
-
-	powered_by_linreg = mx28_get_vddd_power_source_off();
-	if (new_target > cur_target) {
-		if (powered_by_linreg) {
-			bo_int = readl(&power_regs->hw_power_vdddctrl);
-			clrbits_le32(&power_regs->hw_power_vdddctrl,
-					POWER_CTRL_ENIRQ_VDDD_BO);
-		}
-
-		setbits_le32(&power_regs->hw_power_vdddctrl,
-				POWER_VDDDCTRL_BO_OFFSET_MASK);
-
-		do {
-			if (new_target - cur_target > 100)
-				diff = cur_target + 100;
-			else
-				diff = new_target;
-
-			diff -= 800;
-			diff /= 25;
-
-			clrsetbits_le32(&power_regs->hw_power_vdddctrl,
-				POWER_VDDDCTRL_TRG_MASK, diff);
-
-			if (powered_by_linreg)
-				early_delay(1500);
-			else {
-				while (!(readl(&power_regs->hw_power_sts) &
-					POWER_STS_DC_OK))
-					;
-
-			}
-
-			cur_target = readl(&power_regs->hw_power_vdddctrl);
-			cur_target &= POWER_VDDDCTRL_TRG_MASK;
-			cur_target *= 25;	/* 25 mV step*/
-			cur_target += 800;	/* 800 mV lowest */
-		} while (new_target > cur_target);
-
-		if (powered_by_linreg) {
-			writel(POWER_CTRL_VDDD_BO_IRQ,
-				&power_regs->hw_power_ctrl_clr);
-			if (bo_int & POWER_CTRL_ENIRQ_VDDD_BO)
-				setbits_le32(&power_regs->hw_power_vdddctrl,
-						POWER_CTRL_ENIRQ_VDDD_BO);
-		}
-	} else {
-		do {
-			if (cur_target - new_target > 100)
-				diff = cur_target - 100;
-			else
-				diff = new_target;
-
-			diff -= 800;
-			diff /= 25;
-
-			clrsetbits_le32(&power_regs->hw_power_vdddctrl,
-					POWER_VDDDCTRL_TRG_MASK, diff);
-
-			if (powered_by_linreg)
-				early_delay(1500);
-			else {
-				while (!(readl(&power_regs->hw_power_sts) &
-					POWER_STS_DC_OK))
-					;
-
-			}
-
-			cur_target = readl(&power_regs->hw_power_vdddctrl);
-			cur_target &= POWER_VDDDCTRL_TRG_MASK;
-			cur_target *= 25;	/* 25 mV step*/
-			cur_target += 800;	/* 800 mV lowest */
-		} while (new_target < cur_target);
-	}
-
-	clrsetbits_le32(&power_regs->hw_power_vdddctrl,
-			POWER_VDDDCTRL_BO_OFFSET_MASK,
-			new_brownout << POWER_VDDDCTRL_BO_OFFSET_OFFSET);
-}
-
-void mx28_power_init(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-
-	mx28_power_clock2xtal();
-	mx28_power_clear_auto_restart();
-	mx28_power_set_linreg();
-	mx28_power_setup_5v_detect();
-	mx28_power_configure_power_source();
-	mx28_enable_output_rail_protection();
-
-	mx28_power_set_vddio(3300, 3150);
-
-	mx28_power_set_vddd(1350, 1200);
-
-	writel(POWER_CTRL_VDDD_BO_IRQ | POWER_CTRL_VDDA_BO_IRQ |
-		POWER_CTRL_VDDIO_BO_IRQ | POWER_CTRL_VDD5V_DROOP_IRQ |
-		POWER_CTRL_VBUS_VALID_IRQ | POWER_CTRL_BATT_BO_IRQ |
-		POWER_CTRL_DCDC4P2_BO_IRQ, &power_regs->hw_power_ctrl_clr);
-
-	writel(POWER_5VCTRL_PWDN_5VBRNOUT, &power_regs->hw_power_5vctrl_set);
-
-	early_delay(1000);
-}
-
-#ifdef	CONFIG_SPL_MX28_PSWITCH_WAIT
-void mx28_power_wait_pswitch(void)
-{
-	struct mx28_power_regs *power_regs =
-		(struct mx28_power_regs *)MXS_POWER_BASE;
-
-	while (!(readl(&power_regs->hw_power_sts) & POWER_STS_PSWITCH_MASK))
-		;
-}
-#endif
diff --git a/board/denx/m28evk/mmc_boot.c b/board/denx/m28evk/spl_boot.c
index 86d3ab5..86d7d87 100644
--- a/board/denx/m28evk/mmc_boot.c
+++ b/board/denx/m28evk/spl_boot.c
@@ -1,5 +1,5 @@
 /*
- * Freescale i.MX28 Boot setup
+ * DENX M28 Boot setup
  *
  * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
  * on behalf of DENX Software Engineering GmbH
@@ -27,23 +27,8 @@
 #include <config.h>
 #include <asm/io.h>
 #include <asm/arch/iomux-mx28.h>
-
-#include "m28_init.h"
-
-/*
- * This delay function is intended to be used only in early stage of boot, where
- * clock are not set up yet. The timer used here is reset on every boot and
- * takes a few seconds to roll. The boot doesn't take that long, so to keep the
- * code simple, it doesn't take rolling into consideration.
- */
-#define	HW_DIGCTRL_MICROSECONDS	0x8001c0c0
-void early_delay(int delay)
-{
-	uint32_t st = readl(HW_DIGCTRL_MICROSECONDS);
-	st += delay;
-	while (st > readl(HW_DIGCTRL_MICROSECONDS))
-		;
-}
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/sys_proto.h>
 
 #define	MUX_CONFIG_LED	(MXS_PAD_3V3 | MXS_PAD_4MA | MXS_PAD_NOPULL)
 #define	MUX_CONFIG_LCD	(MXS_PAD_3V3 | MXS_PAD_4MA)
@@ -109,10 +94,6 @@ const iomux_cfg_t iomux_setup[] = {
 	MX28_PAD_GPMI_RDY2__CAN0_TX,
 	MX28_PAD_GPMI_RDY3__CAN0_RX,
 
-	/* I2C */
-	MX28_PAD_I2C0_SCL__I2C0_SCL,
-	MX28_PAD_I2C0_SDA__I2C0_SDA,
-
 	/* TSC2007 */
 	MX28_PAD_SAIF0_MCLK__GPIO_3_20 | MUX_CONFIG_TSC,
 
@@ -235,39 +216,5 @@ const iomux_cfg_t iomux_setup[] = {
 
 void board_init_ll(void)
 {
-	mxs_iomux_setup_multiple_pads(iomux_setup, ARRAY_SIZE(iomux_setup));
-	mx28_power_init();
-	mx28_mem_init();
-	mx28_power_wait_pswitch();
-}
-
-/* Support aparatus */
-inline void board_init_f(unsigned long bootflag)
-{
-	for (;;)
-		;
-}
-
-inline void board_init_r(gd_t *id, ulong dest_addr)
-{
-	for (;;)
-		;
-}
-
-inline int printf(const char *fmt, ...)
-{
-	return 0;
-}
-
-inline void __coloured_LED_init(void) {}
-inline void __red_LED_on(void) {}
-void coloured_LED_init(void)
-	__attribute__((weak, alias("__coloured_LED_init")));
-void red_LED_on(void)
-	__attribute__((weak, alias("__red_LED_on")));
-void hang(void) __attribute__ ((noreturn));
-void hang(void)
-{
-	for (;;)
-		;
+	mx28_common_spl_init(iomux_setup, ARRAY_SIZE(iomux_setup));
 }
diff --git a/board/denx/m28evk/start.S b/board/denx/m28evk/start.S
deleted file mode 100644
index 94696d6..0000000
--- a/board/denx/m28evk/start.S
+++ /dev/null
@@ -1,234 +0,0 @@
-/*
- *  armboot - Startup Code for ARM926EJS CPU-core
- *
- *  Copyright (c) 2003  Texas Instruments
- *
- *  ----- Adapted for OMAP1610 OMAP730 from ARM925t code ------
- *
- *  Copyright (c) 2001	Marius Groger <mag@sysgo.de>
- *  Copyright (c) 2002	Alex Zupke <azu@sysgo.de>
- *  Copyright (c) 2002	Gary Jennejohn <garyj@denx.de>
- *  Copyright (c) 2003	Richard Woodruff <r-woodruff2@ti.com>
- *  Copyright (c) 2003	Kshitij <kshitij@ti.com>
- *  Copyright (c) 2010	Albert Aribaud <albert.u.boot@aribaud.net>
- *
- * Change to support call back into iMX28 bootrom
- * Copyright (c) 2011 Marek Vasut <marek.vasut@gmail.com>
- * on behalf of DENX Software Engineering GmbH
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <asm-offsets.h>
-#include <config.h>
-#include <common.h>
-#include <version.h>
-
-#if defined(CONFIG_OMAP1610)
-#include <./configs/omap1510.h>
-#elif defined(CONFIG_OMAP730)
-#include <./configs/omap730.h>
-#endif
-
-/*
- *************************************************************************
- *
- * Jump vector table as in table 3.1 in [1]
- *
- *************************************************************************
- */
-
-
-.globl _start
-_start:
-	b	reset
-	b	undefined_instruction
-	b	software_interrupt
-	b	prefetch_abort
-	b	data_abort
-	b	not_used
-	b	irq
-	b	fiq
-
-/*
- * Vector table, located at address 0x20.
- * This table allows the code running AFTER SPL, the U-Boot, to install it's
- * interrupt handlers here. The problem is that the U-Boot is loaded into RAM,
- * including it's interrupt vectoring table and the table at 0x0 is still the
- * SPLs. So if interrupt happens in U-Boot, the SPLs interrupt vectoring table
- * is still used.
- */
-_vt_reset:
-	.word	_reset
-_vt_undefined_instruction:
-	.word	_hang
-_vt_software_interrupt:
-	.word	_hang
-_vt_prefetch_abort:
-	.word	_hang
-_vt_data_abort:
-	.word	_hang
-_vt_not_used:
-	.word	_reset
-_vt_irq:
-	.word	_hang
-_vt_fiq:
-	.word	_hang
-
-reset:
-	ldr	pc, _vt_reset
-undefined_instruction:
-	ldr	pc, _vt_undefined_instruction
-software_interrupt:
-	ldr	pc, _vt_software_interrupt
-prefetch_abort:
-	ldr	pc, _vt_prefetch_abort
-data_abort:
-	ldr	pc, _vt_data_abort
-not_used:
-	ldr	pc, _vt_not_used
-irq:
-	ldr	pc, _vt_irq
-fiq:
-	ldr	pc, _vt_fiq
-
-	.balignl 16,0xdeadbeef
-
-/*
- *************************************************************************
- *
- * Startup Code (reset vector)
- *
- * do important init only if we don't start from memory!
- * setup Memory and board specific bits prior to relocation.
- * relocate armboot to ram
- * setup stack
- *
- *************************************************************************
- */
-
-.globl _TEXT_BASE
-_TEXT_BASE:
-	.word	CONFIG_SYS_TEXT_BASE
-
-/*
- * These are defined in the board-specific linker script.
- * Subtracting _start from them lets the linker put their
- * relative position in the executable instead of leaving
- * them null.
- */
-.globl _bss_start_ofs
-_bss_start_ofs:
-	.word __bss_start - _start
-
-.globl _bss_end_ofs
-_bss_end_ofs:
-	.word __bss_end__ - _start
-
-.globl _end_ofs
-_end_ofs:
-	.word _end - _start
-
-#ifdef CONFIG_USE_IRQ
-/* IRQ stack memory (calculated at run-time) */
-.globl IRQ_STACK_START
-IRQ_STACK_START:
-	.word	0x0badc0de
-
-/* IRQ stack memory (calculated at run-time) */
-.globl FIQ_STACK_START
-FIQ_STACK_START:
-	.word 0x0badc0de
-#endif
-
-/* IRQ stack memory (calculated at run-time) + 8 bytes */
-.globl IRQ_STACK_START_IN
-IRQ_STACK_START_IN:
-	.word	0x0badc0de
-
-/*
- * the actual reset code
- */
-
-_reset:
-	/*
-	 * Store all registers on old stack pointer, this will allow us later to
-	 * return to the BootROM and let the BootROM load U-Boot into RAM.
-	 */
-	push	{r0-r12,r14}
-
-	/*
-	 * set the cpu to SVC32 mode
-	 */
-	mrs	r0,cpsr
-	bic	r0,r0,#0x1f
-	orr	r0,r0,#0xd3
-	msr	cpsr,r0
-
-	/*
-	 * we do sys-critical inits only at reboot,
-	 * not when booting from ram!
-	 */
-#ifndef CONFIG_SKIP_LOWLEVEL_INIT
-	bl	cpu_init_crit
-#endif
-
-	bl	board_init_ll
-
-	pop	{r0-r12,r14}
-	bx	lr
-
-/*
- *************************************************************************
- *
- * CPU_init_critical registers
- *
- * setup important registers
- * setup memory timing
- *
- *************************************************************************
- */
-#ifndef CONFIG_SKIP_LOWLEVEL_INIT
-cpu_init_crit:
-	/*
-	 * flush v4 I/D caches
-	 */
-	mov	r0, #0
-	mcr	p15, 0, r0, c7, c7, 0	/* flush v3/v4 cache */
-	mcr	p15, 0, r0, c8, c7, 0	/* flush v4 TLB */
-
-	/*
-	 * disable MMU stuff and caches
-	 */
-	mrc	p15, 0, r0, c1, c0, 0
-	bic	r0, r0, #0x00002300	/* clear bits 13, 9:8 (--V- --RS) */
-	bic	r0, r0, #0x00000087	/* clear bits 7, 2:0 (B--- -CAM) */
-	orr	r0, r0, #0x00000002	/* set bit 2 (A) Align */
-	orr	r0, r0, #0x00001000	/* set bit 12 (I) I-Cache */
-	mcr	p15, 0, r0, c1, c0, 0
-
-	mov	pc, lr		/* back to my caller */
-
-	.align	5
-#endif /* CONFIG_SKIP_LOWLEVEL_INIT */
-
-_hang:
-	ldr	sp, _TEXT_BASE			/* switch to abort stack */
-1:
-	bl	1b				/* hang and never return */
diff --git a/board/denx/m28evk/u-boot-spl.lds b/board/denx/m28evk/u-boot-spl.lds
deleted file mode 100644
index e296a92..0000000
--- a/board/denx/m28evk/u-boot-spl.lds
+++ /dev/null
@@ -1,87 +0,0 @@
-/*
- * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
- * on behalf of DENX Software Engineering GmbH
- *
- * January 2004 - Changed to support H4 device
- * Copyright (c) 2004-2008 Texas Instruments
- *
- * (C) Copyright 2002
- * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
-OUTPUT_ARCH(arm)
-ENTRY(_start)
-SECTIONS
-{
-	. = 0x00000000;
-
-	. = ALIGN(4);
-	.text	:
-	{
-		board/denx/m28evk/start.o	(.text)
-		*(.text)
-	}
-
-	. = ALIGN(4);
-	.rodata : { *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) }
-
-	. = ALIGN(4);
-	.data : {
-		*(.data)
-	}
-
-	. = ALIGN(4);
-	__u_boot_cmd_start = .;
-	.u_boot_cmd : { *(.u_boot_cmd) }
-	__u_boot_cmd_end = .;
-
-	. = ALIGN(4);
-
-	.rel.dyn : {
-		__rel_dyn_start = .;
-		*(.rel*)
-		__rel_dyn_end = .;
-	}
-
-	.dynsym : {
-		__dynsym_start = .;
-		*(.dynsym)
-	}
-
-	_end = .;
-
-	.bss __rel_dyn_start (OVERLAY) : {
-		__bss_start = .;
-		*(.bss)
-		 . = ALIGN(4);
-		__bss_end__ = .;
-	}
-
-	/DISCARD/ : { *(.bss*) }
-	/DISCARD/ : { *(.dynstr*) }
-	/DISCARD/ : { *(.dynsym*) }
-	/DISCARD/ : { *(.dynamic*) }
-	/DISCARD/ : { *(.hash*) }
-	/DISCARD/ : { *(.plt*) }
-	/DISCARD/ : { *(.interp*) }
-	/DISCARD/ : { *(.gnu*) }
-}