mxs: add support for 4.1

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu> SVN-Revision: 46525
2015-07-31 12:22:12 +00:00 · 2015-07-31 12:22:12 +00:00 · 202e746726
commit 202e746726
parent 9520383587
6 changed files with 1218 additions and 0 deletions
--- a/target/linux/mxs/config-4.1
+++ b/target/linux/mxs/config-4.1
@ -0,0 +1,297 @@
+CONFIG_ALIGNMENT_TRAP=y
+# CONFIG_AMBA_PL08X is not set
+# CONFIG_APM_EMULATION is not set
+CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE=y
+CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
+CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y
+CONFIG_ARCH_HAS_SG_CHAIN=y
+CONFIG_ARCH_HAVE_CUSTOM_GPIO_H=y
+CONFIG_ARCH_HIBERNATION_POSSIBLE=y
+CONFIG_ARCH_MIGHT_HAVE_PC_PARPORT=y
+CONFIG_ARCH_MULTIPLATFORM=y
+CONFIG_ARCH_MULTI_CPU_AUTO=y
+# CONFIG_ARCH_MULTI_V4 is not set
+# CONFIG_ARCH_MULTI_V4T is not set
+CONFIG_ARCH_MULTI_V4_V5=y
+CONFIG_ARCH_MULTI_V5=y
+CONFIG_ARCH_MXS=y
+CONFIG_ARCH_NR_GPIO=0
+CONFIG_ARCH_REQUIRE_GPIOLIB=y
+# CONFIG_ARCH_SELECT_MEMORY_MODEL is not set
+# CONFIG_ARCH_SPARSEMEM_DEFAULT is not set
+CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y
+CONFIG_ARCH_SUPPORTS_UPROBES=y
+CONFIG_ARCH_SUSPEND_POSSIBLE=y
+CONFIG_ARCH_USE_BUILTIN_BSWAP=y
+CONFIG_ARCH_USE_CMPXCHG_LOCKREF=y
+CONFIG_ARCH_WANT_GENERAL_HUGETLB=y
+CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
+CONFIG_ARCH_WANT_OPTIONAL_GPIOLIB=y
+CONFIG_ARM=y
+CONFIG_ARM_AMBA=y
+CONFIG_ARM_APPENDED_DTB=y
+CONFIG_ARM_ATAG_DTB_COMPAT=y
+# CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND is not set
+CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER=y
+# CONFIG_ARM_CPUIDLE is not set
+CONFIG_ARM_CPU_SUSPEND=y
+CONFIG_ARM_HAS_SG_CHAIN=y
+CONFIG_ARM_L1_CACHE_SHIFT=5
+CONFIG_ARM_PATCH_PHYS_VIRT=y
+# CONFIG_ARM_SP805_WATCHDOG is not set
+CONFIG_ARM_THUMB=y
+CONFIG_ATAGS=y
+CONFIG_AUTO_ZRELADDR=y
+# CONFIG_CACHE_L2X0 is not set
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_CLKDEV_LOOKUP=y
+CONFIG_CLKSRC_MMIO=y
+CONFIG_CLKSRC_OF=y
+CONFIG_CLONE_BACKWARDS=y
+CONFIG_CMDLINE="console=ttyAMA0,115200 root=/dev/mmcblk0p2 rw rootwait"
+CONFIG_CMDLINE_FROM_BOOTLOADER=y
+CONFIG_COMMON_CLK=y
+CONFIG_COREDUMP=y
+CONFIG_CPU_32v5=y
+CONFIG_CPU_ABRT_EV5TJ=y
+CONFIG_CPU_ARM926T=y
+# CONFIG_CPU_CACHE_ROUND_ROBIN is not set
+CONFIG_CPU_CACHE_VIVT=y
+CONFIG_CPU_COPY_V4WB=y
+CONFIG_CPU_CP15=y
+CONFIG_CPU_CP15_MMU=y
+# CONFIG_CPU_DCACHE_WRITETHROUGH is not set
+# CONFIG_CPU_ICACHE_DISABLE is not set
+CONFIG_CPU_IDLE=y
+CONFIG_CPU_IDLE_GOV_LADDER=y
+CONFIG_CPU_IDLE_GOV_MENU=y
+CONFIG_CPU_PABRT_LEGACY=y
+CONFIG_CPU_PM=y
+CONFIG_CPU_TLB_V4WBI=y
+CONFIG_CPU_USE_DOMAINS=y
+CONFIG_CRC16=y
+CONFIG_CROSS_MEMORY_ATTACH=y
+CONFIG_CRYPTO_CRC32C=y
+# CONFIG_CRYPTO_DEV_MXS_DCP is not set
+CONFIG_CRYPTO_HASH=y
+CONFIG_CRYPTO_HASH2=y
+CONFIG_CRYPTO_HW=y
+CONFIG_DEBUG_LL_INCLUDE="mach/debug-macro.S"
+# CONFIG_DEBUG_UART_8250 is not set
+# CONFIG_DEBUG_USER is not set
+CONFIG_DMADEVICES=y
+CONFIG_DMA_ENGINE=y
+CONFIG_DMA_OF=y
+CONFIG_DTC=y
+CONFIG_EXT4_FS=y
+CONFIG_FEC=y
+CONFIG_FRAME_POINTER=y
+# CONFIG_FSL_PQ_MDIO is not set
+CONFIG_FS_MBCACHE=y
+CONFIG_GENERIC_ALLOCATOR=y
+CONFIG_GENERIC_ATOMIC64=y
+CONFIG_GENERIC_BUG=y
+CONFIG_GENERIC_CLOCKEVENTS=y
+CONFIG_GENERIC_IDLE_POLL_SETUP=y
+CONFIG_GENERIC_IO=y
+CONFIG_GENERIC_IRQ_CHIP=y
+CONFIG_GENERIC_IRQ_SHOW=y
+CONFIG_GENERIC_IRQ_SHOW_LEVEL=y
+CONFIG_GENERIC_PCI_IOMAP=y
+CONFIG_GENERIC_SCHED_CLOCK=y
+CONFIG_GENERIC_SMP_IDLE_THREAD=y
+CONFIG_GENERIC_STRNCPY_FROM_USER=y
+CONFIG_GENERIC_STRNLEN_USER=y
+CONFIG_GPIOLIB=y
+CONFIG_GPIO_DEVRES=y
+CONFIG_GPIO_GENERIC=y
+CONFIG_GPIO_GENERIC_PLATFORM=y
+CONFIG_GPIO_MXS=y
+CONFIG_GPIO_SYSFS=y
+CONFIG_HANDLE_DOMAIN_IRQ=y
+CONFIG_HARDIRQS_SW_RESEND=y
+CONFIG_HAS_DMA=y
+CONFIG_HAS_IOMEM=y
+CONFIG_HAS_IOPORT_MAP=y
+# CONFIG_HAVE_64BIT_ALIGNED_ACCESS is not set
+CONFIG_HAVE_ARCH_AUDITSYSCALL=y
+# CONFIG_HAVE_ARCH_BITREVERSE is not set
+CONFIG_HAVE_ARCH_JUMP_LABEL=y
+CONFIG_HAVE_ARCH_KGDB=y
+CONFIG_HAVE_ARCH_PFN_VALID=y
+CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
+CONFIG_HAVE_ARCH_TRACEHOOK=y
+# CONFIG_HAVE_BOOTMEM_INFO_NODE is not set
+CONFIG_HAVE_BPF_JIT=y
+CONFIG_HAVE_CC_STACKPROTECTOR=y
+CONFIG_HAVE_CLK=y
+CONFIG_HAVE_CLK_PREPARE=y
+CONFIG_HAVE_CONTEXT_TRACKING=y
+CONFIG_HAVE_C_RECORDMCOUNT=y
+CONFIG_HAVE_DEBUG_KMEMLEAK=y
+CONFIG_HAVE_DMA_API_DEBUG=y
+CONFIG_HAVE_DMA_ATTRS=y
+CONFIG_HAVE_DMA_CONTIGUOUS=y
+CONFIG_HAVE_DYNAMIC_FTRACE=y
+CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
+CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
+CONFIG_HAVE_FUNCTION_TRACER=y
+CONFIG_HAVE_GENERIC_DMA_COHERENT=y
+CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
+CONFIG_HAVE_KERNEL_GZIP=y
+CONFIG_HAVE_KERNEL_LZ4=y
+CONFIG_HAVE_KERNEL_LZMA=y
+CONFIG_HAVE_KERNEL_LZO=y
+CONFIG_HAVE_KERNEL_XZ=y
+CONFIG_HAVE_LATENCYTOP_SUPPORT=y
+CONFIG_HAVE_MEMBLOCK=y
+CONFIG_HAVE_NET_DSA=y
+CONFIG_HAVE_OPROFILE=y
+CONFIG_HAVE_OPTPROBES=y
+CONFIG_HAVE_PERF_EVENTS=y
+CONFIG_HAVE_PERF_REGS=y
+CONFIG_HAVE_PERF_USER_STACK_DUMP=y
+CONFIG_HAVE_PROC_CPU=y
+CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
+CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
+CONFIG_HAVE_UID16=y
+CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
+CONFIG_HZ_FIXED=0
+CONFIG_HZ_PERIODIC=y
+CONFIG_I2C=y
+CONFIG_I2C_ALGOBIT=y
+CONFIG_I2C_ALGOPCA=y
+CONFIG_I2C_ALGOPCF=y
+CONFIG_I2C_BOARDINFO=y
+CONFIG_I2C_CHARDEV=y
+CONFIG_I2C_COMPAT=y
+CONFIG_I2C_MUX=y
+# CONFIG_I2C_MUX_GPIO is not set
+# CONFIG_I2C_MUX_PCA9541 is not set
+# CONFIG_I2C_MUX_PCA954x is not set
+CONFIG_I2C_MUX_PINCTRL=y
+# CONFIG_I2C_MXS is not set
+CONFIG_IIO=y
+CONFIG_IIO_BUFFER=y
+CONFIG_IIO_KFIFO_BUF=y
+CONFIG_IIO_PERIODIC_RTC_TRIGGER=y
+CONFIG_IIO_SYSFS_TRIGGER=y
+CONFIG_IIO_TRIGGER=y
+CONFIG_INITRAMFS_SOURCE=""
+CONFIG_INPUT=y
+CONFIG_IOMMU_HELPER=y
+CONFIG_IRQCHIP=y
+CONFIG_IRQ_DOMAIN=y
+CONFIG_IRQ_FORCED_THREADING=y
+CONFIG_IRQ_WORK=y
+# CONFIG_ISDN is not set
+CONFIG_JBD2=y
+# CONFIG_LEDS_REGULATOR is not set
+CONFIG_LIBFDT=y
+CONFIG_LZO_COMPRESS=y
+CONFIG_LZO_DECOMPRESS=y
+CONFIG_MDIO_BOARDINFO=y
+CONFIG_MFD_SYSCON=y
+CONFIG_MIGHT_HAVE_PCI=y
+CONFIG_MMC=y
+CONFIG_MMC_BLOCK=y
+CONFIG_MMC_MXS=y
+CONFIG_MODULES_USE_ELF_REL=y
+# CONFIG_MTD_PHYSMAP_OF is not set
+CONFIG_MULTI_IRQ_HANDLER=y
+CONFIG_MXS_DMA=y
+# CONFIG_MXS_LRADC is not set
+CONFIG_MXS_POWER=y
+CONFIG_NEED_DMA_MAP_STATE=y
+CONFIG_NEED_KUSER_HELPERS=y
+CONFIG_NEED_PER_CPU_KM=y
+CONFIG_NET_PTP_CLASSIFY=y
+CONFIG_NLS=y
+CONFIG_NO_BOOTMEM=y
+CONFIG_OF=y
+CONFIG_OF_ADDRESS=y
+CONFIG_OF_EARLY_FLATTREE=y
+CONFIG_OF_FLATTREE=y
+CONFIG_OF_GPIO=y
+CONFIG_OF_IRQ=y
+CONFIG_OF_MDIO=y
+CONFIG_OF_MTD=y
+CONFIG_OF_NET=y
+CONFIG_OF_RESERVED_MEM=y
+CONFIG_OLD_SIGACTION=y
+CONFIG_OLD_SIGSUSPEND3=y
+CONFIG_PAGEFLAGS_EXTENDED=y
+CONFIG_PAGE_OFFSET=0xC0000000
+# CONFIG_PCI is not set
+# CONFIG_PCI_DOMAINS_GENERIC is not set
+# CONFIG_PCI_SYSCALL is not set
+CONFIG_PERF_USE_VMALLOC=y
+CONFIG_PGTABLE_LEVELS=2
+CONFIG_PHYLIB=y
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_IMX23=y
+CONFIG_PINCTRL_IMX28=y
+CONFIG_PINCTRL_MXS=y
+# CONFIG_PINCTRL_SINGLE is not set
+# CONFIG_PL330_DMA is not set
+CONFIG_PM=y
+CONFIG_PM_CLK=y
+# CONFIG_PM_DEBUG is not set
+CONFIG_POWER_SUPPLY=y
+CONFIG_PPS=y
+CONFIG_PTP_1588_CLOCK=y
+# CONFIG_RCU_STALL_COMMON is not set
+CONFIG_REGMAP=y
+CONFIG_REGMAP_I2C=y
+CONFIG_REGMAP_MMIO=y
+CONFIG_REGMAP_SPI=y
+CONFIG_REGULATOR=y
+CONFIG_REGULATOR_DEBUG=y
+CONFIG_REGULATOR_FIXED_VOLTAGE=y
+CONFIG_REGULATOR_GPIO=y
+CONFIG_REGULATOR_MXS=y
+# CONFIG_REGULATOR_USERSPACE_CONSUMER is not set
+CONFIG_RTC_CLASS=y
+# CONFIG_RTC_DRV_STMP is not set
+CONFIG_RWSEM_XCHGADD_ALGORITHM=y
+CONFIG_SCHED_HRTICK=y
+# CONFIG_SCSI_DMA is not set
+CONFIG_SERIAL_AMBA_PL010=y
+CONFIG_SERIAL_AMBA_PL010_CONSOLE=y
+CONFIG_SERIAL_AMBA_PL011=y
+CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
+CONFIG_SERIAL_MCTRL_GPIO=y
+CONFIG_SERIAL_MXS_AUART=y
+CONFIG_SERIAL_MXS_AUART_CONSOLE=y
+CONFIG_SMSC_PHY=y
+CONFIG_SOC_BUS=y
+CONFIG_SOC_IMX23=y
+CONFIG_SOC_IMX28=y
+CONFIG_SPARSE_IRQ=y
+CONFIG_SPI=y
+CONFIG_SPI_MASTER=y
+# CONFIG_SPI_MXS is not set
+CONFIG_SPLIT_PTLOCK_CPUS=999999
+CONFIG_SRCU=y
+CONFIG_STMP_DEVICE=y
+CONFIG_SWIOTLB=y
+CONFIG_SYS_SUPPORTS_APM_EMULATION=y
+CONFIG_TICK_CPU_ACCOUNTING=y
+CONFIG_UID16=y
+CONFIG_UNCOMPRESS_INCLUDE="debug/uncompress.h"
+CONFIG_USB=y
+CONFIG_USB_COMMON=y
+CONFIG_USB_EHCI_HCD=y
+# CONFIG_USB_EHCI_HCD_PLATFORM is not set
+# CONFIG_USB_MXS_PHY is not set
+CONFIG_USB_OTG=y
+CONFIG_USB_SUPPORT=y
+CONFIG_USE_OF=y
+CONFIG_VECTORS_BASE=0xffff0000
+# CONFIG_VFP is not set
+CONFIG_WATCHDOG_CORE=y
+CONFIG_XZ_DEC_ARM=y
+CONFIG_XZ_DEC_BCJ=y
+CONFIG_ZBOOT_ROM_BSS=0
+CONFIG_ZBOOT_ROM_TEXT=0
+CONFIG_ZONE_DMA_FLAG=0
--- a/target/linux/mxs/patches-4.1/100-mxs-select-syscon.patch
+++ b/target/linux/mxs/patches-4.1/100-mxs-select-syscon.patch
@ -0,0 +1,12 @@
+diff --git a/arch/arm/mach-mxs/Kconfig b/arch/arm/mach-mxs/Kconfig
+index 8479413..bf04d38 100644
+--- a/arch/arm/mach-mxs/Kconfig
+++ b/arch/arm/mach-mxs/Kconfig
+@@ -17,6 +17,7 @@ config ARCH_MXS
+ 	depends on ARCH_MULTI_V5
+ 	select ARCH_REQUIRE_GPIOLIB
+ 	select CLKSRC_MMIO
+	select MFD_SYSCON
+ 	select PINCTRL
+ 	select SOC_BUS
+ 	select SOC_IMX23
--- a/target/linux/mxs/patches-4.1/101-mxs-add-mxs_power.patch
+++ b/target/linux/mxs/patches-4.1/101-mxs-add-mxs_power.patch
@ -0,0 +1,173 @@
+diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
+index 4091fb0..0fcc158 100644
+--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
+@@ -43,6 +43,14 @@ config MAX8925_POWER
+ 	  Say Y here to enable support for the battery charger in the Maxim
+ 	  MAX8925 PMIC.
+ 
+config MXS_POWER
+	tristate "Freescale MXS power subsystem support"
+	depends on ARCH_MXS || COMPILE_TEST
+	help
+	  Say Y here to enable support for the Freescale i.MX23/i.MX28
+	  power subsystem. This is a requirement to get access to on-chip
+	  regulators, battery charger and many more.
+
+ config WM831X_BACKUP
+ 	tristate "WM831X backup battery charger support"
+ 	depends on MFD_WM831X
+diff --git a/drivers/power/Makefile b/drivers/power/Makefile
+index b7b0181..8edcad7 100644
+--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
+@@ -10,6 +10,7 @@ obj-$(CONFIG_GENERIC_ADC_BATTERY)	+= generic-adc-battery.o
+ obj-$(CONFIG_PDA_POWER)		+= pda_power.o
+ obj-$(CONFIG_APM_POWER)		+= apm_power.o
+ obj-$(CONFIG_MAX8925_POWER)	+= max8925_power.o
+obj-$(CONFIG_MXS_POWER)		+= mxs_power.o
+ obj-$(CONFIG_WM831X_BACKUP)	+= wm831x_backup.o
+ obj-$(CONFIG_WM831X_POWER)	+= wm831x_power.o
+ obj-$(CONFIG_WM8350_POWER)	+= wm8350_power.o
+diff --git a/drivers/power/mxs_power.c b/drivers/power/mxs_power.c
+new file mode 100644
+index 0000000..669bfb1
+--- /dev/null
+++ b/drivers/power/mxs_power.c
+@@ -0,0 +1,136 @@
+/*
+ * Freescale MXS power subsystem
+ *
+ * Copyright (C) 2014 Stefan Wahren
+ *
+ * Inspired by imx-bootlets
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/stmp_device.h>
+#include <linux/types.h>
+
+#define BM_POWER_CTRL_POLARITY_VBUSVALID	BIT(5)
+#define BM_POWER_CTRL_VBUSVALID_IRQ		BIT(4)
+#define BM_POWER_CTRL_ENIRQ_VBUS_VALID		BIT(3)
+
+#define HW_POWER_5VCTRL_OFFSET	0x10
+
+#define BM_POWER_5VCTRL_VBUSVALID_THRESH	(7 << 8)
+#define BM_POWER_5VCTRL_PWDN_5VBRNOUT		BIT(7)
+#define BM_POWER_5VCTRL_ENABLE_LINREG_ILIMIT	BIT(6)
+#define BM_POWER_5VCTRL_VBUSVALID_5VDETECT	BIT(4)
+
+#define HW_POWER_5VCTRL_VBUSVALID_THRESH_4_40V	(5 << 8)
+
+struct mxs_power_data {
+	void __iomem *base_addr;
+	struct power_supply *ac;
+};
+
+static enum power_supply_property mxs_power_ac_props[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+};
+
+static int mxs_power_ac_get_property(struct power_supply *psy,
+				     enum power_supply_property psp,
+				     union power_supply_propval *val)
+{
+	int ret = 0;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		val->intval = 1;
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static const struct of_device_id of_mxs_power_match[] = {
+	{ .compatible = "fsl,imx23-power" },
+	{ .compatible = "fsl,imx28-power" },
+	{ /* end */ }
+};
+MODULE_DEVICE_TABLE(of, of_mxs_power_match);
+
+static const struct power_supply_desc ac_desc = {
+	.properties	= mxs_power_ac_props,
+	.num_properties	= ARRAY_SIZE(mxs_power_ac_props),
+	.get_property	= mxs_power_ac_get_property,
+	.name		= "ac",
+	.type		= POWER_SUPPLY_TYPE_MAINS,
+};
+
+static int mxs_power_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct resource *res;
+	struct mxs_power_data *data;
+	struct power_supply_config psy_cfg = {};
+	void __iomem *v5ctrl_addr;
+
+	if (!np) {
+		dev_err(dev, "missing device tree\n");
+		return -EINVAL;
+	}
+
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	data->base_addr = devm_ioremap_resource(dev, res);
+	if (IS_ERR(data->base_addr))
+		return PTR_ERR(data->base_addr);
+
+	psy_cfg.drv_data = data;
+
+	data->ac = devm_power_supply_register(dev, &ac_desc, &psy_cfg);
+	if (IS_ERR(data->ac))
+		return PTR_ERR(data->ac);
+
+	platform_set_drvdata(pdev, data);
+
+	v5ctrl_addr = data->base_addr + HW_POWER_5VCTRL_OFFSET;
+
+	/* Make sure the current limit of the linregs are disabled. */
+	writel(BM_POWER_5VCTRL_ENABLE_LINREG_ILIMIT,
+	       v5ctrl_addr + STMP_OFFSET_REG_CLR);
+
+	return of_platform_populate(np, NULL, NULL, dev);
+}
+
+static struct platform_driver mxs_power_driver = {
+	.driver = {
+		.name	= "mxs_power",
+		.of_match_table = of_mxs_power_match,
+	},
+	.probe	= mxs_power_probe,
+};
+
+module_platform_driver(mxs_power_driver);
+
+MODULE_AUTHOR("Stefan Wahren <stefan.wahren@i2se.com>");
+MODULE_DESCRIPTION("Freescale MXS power subsystem");
+MODULE_LICENSE("GPL v2");
--- a/target/linux/mxs/patches-4.1/102-mxs-add-regulator-driver.patch
+++ b/target/linux/mxs/patches-4.1/102-mxs-add-regulator-driver.patch
@ -0,0 +1,577 @@
+diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
+index a6f116a..7b525f5 100644
+--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
+@@ -450,6 +450,14 @@ config REGULATOR_MT6397
+ 	  This driver supports the control of different power rails of device
+ 	  through regulator interface.
+ 
+config REGULATOR_MXS
+	tristate "Freescale MXS on-chip regulators"
+	depends on (MXS_POWER || COMPILE_TEST)
+	help
+	  Say y here to support Freescale MXS on-chip regulators.
+	  It is recommended that this option be enabled on i.MX23,
+	  i.MX28 platform.
+
+ config REGULATOR_PALMAS
+ 	tristate "TI Palmas PMIC Regulators"
+ 	depends on MFD_PALMAS
+diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
+index 2c4da15..a3ebf23 100644
+--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
+@@ -60,6 +60,7 @@ obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o
+ obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o
+ obj-$(CONFIG_REGULATOR_MC13XXX_CORE) +=  mc13xxx-regulator-core.o
+ obj-$(CONFIG_REGULATOR_MT6397)	+= mt6397-regulator.o
+obj-$(CONFIG_REGULATOR_MXS) += mxs-regulator.o
+ obj-$(CONFIG_REGULATOR_QCOM_RPM) += qcom_rpm-regulator.o
+ obj-$(CONFIG_REGULATOR_PALMAS) += palmas-regulator.o
+ obj-$(CONFIG_REGULATOR_PFUZE100) += pfuze100-regulator.o
+diff --git a/drivers/regulator/mxs-regulator.c b/drivers/regulator/mxs-regulator.c
+new file mode 100644
+index 0000000..e53707b
+--- /dev/null
+++ b/drivers/regulator/mxs-regulator.c
+@@ -0,0 +1,540 @@
+/*
+ * Freescale MXS on-chip regulators
+ *
+ * Embedded Alley Solutions, Inc <source@embeddedalley.com>
+ *
+ * Copyright (C) 2014 Stefan Wahren
+ * Copyright (C) 2010 Freescale Semiconductor, Inc.
+ * Copyright (C) 2008 Embedded Alley Solutions, Inc All Rights Reserved.
+ *
+ * Inspired by imx-bootlets
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/slab.h>
+
+/* Powered by linear regulator.  DCDC output is gated off and
+   the linreg output is equal to the target. */
+#define HW_POWER_LINREG_DCDC_OFF		1
+
+/* Powered by linear regulator.  DCDC output is not gated off
+   and is ready for the automatic hardware transistion after a 5V
+   event.  The converters are not enabled when 5V is present. LinReg output
+   is 25mV below target. */
+#define HW_POWER_LINREG_DCDC_READY		2
+
+/* Powered by DCDC converter and the LinReg is on. LinReg output
+   is 25mV below target. */
+#define HW_POWER_DCDC_LINREG_ON			3
+
+/* Powered by DCDC converter and the LinReg is off. LinReg output
+   is 25mV below target. */
+#define HW_POWER_DCDC_LINREG_OFF		4
+
+/* Powered by DCDC converter and the LinReg is ready for the
+   automatic hardware transfer.  The LinReg output is not enabled and
+   depends on the 5V presence to enable the LinRegs.  LinReg offset is 25mV
+   below target. */
+#define HW_POWER_DCDC_LINREG_READY		5
+
+/* Powered by an external source when 5V is present.  This does not
+   necessarily mean the external source is powered by 5V,but the chip needs
+   to be aware that 5V is present. */
+#define HW_POWER_EXTERNAL_SOURCE_5V		6
+
+/* Powered by an external source when 5V is not present.This doesn't
+   necessarily mean the external source is powered by the battery, but the
+   chip needs to be aware that the battery is present */
+#define HW_POWER_EXTERNAL_SOURCE_BATTERY	7
+
+/* Unknown configuration.  This is an error. */
+#define HW_POWER_UNKNOWN_SOURCE			8
+
+/* TODO: Move power register offsets into header file */
+#define HW_POWER_5VCTRL		0x00000010
+#define HW_POWER_VDDDCTRL	0x00000040
+#define HW_POWER_VDDACTRL	0x00000050
+#define HW_POWER_VDDIOCTRL	0x00000060
+#define HW_POWER_MISC		0x00000090
+#define HW_POWER_STS		0x000000c0
+
+#define BM_POWER_STS_VBUSVALID0_STATUS	BIT(15)
+#define BM_POWER_STS_DC_OK		BIT(9)
+
+#define BM_POWER_5VCTRL_ILIMIT_EQ_ZERO	BIT(2)
+#define BM_POWER_5VCTRL_ENABLE_DCDC	BIT(0)
+
+#define BM_POWER_LINREG_OFFSET_DCDC_MODE	BIT(1)
+
+#define SHIFT_FREQSEL			4
+
+#define BM_POWER_MISC_FREQSEL		(7 << SHIFT_FREQSEL)
+
+/* Recommended DC-DC clock source values */
+#define HW_POWER_MISC_FREQSEL_20000_KHZ	1
+#define HW_POWER_MISC_FREQSEL_24000_KHZ	2
+#define HW_POWER_MISC_FREQSEL_19200_KHZ	3
+
+#define HW_POWER_MISC_SEL_PLLCLK	BIT(0)
+
+/* Regulator IDs */
+#define MXS_DCDC	1
+#define MXS_VDDIO	2
+#define MXS_VDDA	3
+#define MXS_VDDD	4
+
+struct mxs_reg_info {
+	/* regulator descriptor */
+	struct regulator_desc desc;
+
+	/* regulator control register */
+	int ctrl_reg;
+
+	/* disable DC-DC output */
+	unsigned int disable_fet_mask;
+
+	/* steps between linreg output and DC-DC target */
+	unsigned int linreg_offset_mask;
+	u8 linreg_offset_shift;
+
+	/* function which determine power source */
+	u8 (*get_power_source)(struct regulator_dev *);
+};
+
+static inline u8 get_linreg_offset(struct mxs_reg_info *ldo, u32 regs)
+{
+	return (regs & ldo->linreg_offset_mask) >> ldo->linreg_offset_shift;
+}
+
+static u8 get_vddio_power_source(struct regulator_dev *reg)
+{
+	struct mxs_reg_info *ldo = rdev_get_drvdata(reg);
+	u32 v5ctrl, status, base;
+	u8 offset;
+
+	if (regmap_read(reg->regmap, HW_POWER_5VCTRL, &v5ctrl))
+		return HW_POWER_UNKNOWN_SOURCE;
+
+	if (regmap_read(reg->regmap, HW_POWER_STS, &status))
+		return HW_POWER_UNKNOWN_SOURCE;
+
+	if (regmap_read(reg->regmap, ldo->ctrl_reg, &base))
+		return HW_POWER_UNKNOWN_SOURCE;
+
+	offset = get_linreg_offset(ldo, base);
+
+	/* If VBUS valid then 5 V power supply present */
+	if (status & BM_POWER_STS_VBUSVALID0_STATUS) {
+		/* Powered by Linreg, DC-DC is off */
+		if ((base & ldo->disable_fet_mask) &&
+		    !(offset & BM_POWER_LINREG_OFFSET_DCDC_MODE)) {
+			return HW_POWER_LINREG_DCDC_OFF;
+		}
+
+		if (v5ctrl & BM_POWER_5VCTRL_ENABLE_DCDC) {
+			/* Powered by DC-DC, Linreg is on */
+			if (offset & BM_POWER_LINREG_OFFSET_DCDC_MODE)
+				return HW_POWER_DCDC_LINREG_ON;
+		} else {
+			/* Powered by Linreg, DC-DC is off */
+			if (!(offset & BM_POWER_LINREG_OFFSET_DCDC_MODE))
+				return HW_POWER_LINREG_DCDC_OFF;
+		}
+	} else {
+		/* Powered by DC-DC, Linreg is on */
+		if (offset & BM_POWER_LINREG_OFFSET_DCDC_MODE)
+			return HW_POWER_DCDC_LINREG_ON;
+	}
+
+	return HW_POWER_UNKNOWN_SOURCE;
+}
+
+static u8 get_vdda_vddd_power_source(struct regulator_dev *reg)
+{
+	struct mxs_reg_info *ldo = rdev_get_drvdata(reg);
+	struct regulator_desc *desc = &ldo->desc;
+	u32 v5ctrl, status, base;
+	u8 offset;
+
+	if (regmap_read(reg->regmap, HW_POWER_5VCTRL, &v5ctrl))
+		return HW_POWER_UNKNOWN_SOURCE;
+
+	if (regmap_read(reg->regmap, HW_POWER_STS, &status))
+		return HW_POWER_UNKNOWN_SOURCE;
+
+	if (regmap_read(reg->regmap, ldo->ctrl_reg, &base))
+		return HW_POWER_UNKNOWN_SOURCE;
+
+	offset = get_linreg_offset(ldo, base);
+
+	/* DC-DC output is disabled */
+	if (base & ldo->disable_fet_mask) {
+		/* Powered by 5 V supply */
+		if (status & BM_POWER_STS_VBUSVALID0_STATUS)
+			return HW_POWER_EXTERNAL_SOURCE_5V;
+
+		/* Powered by Linreg, DC-DC is off */
+		if (!(offset & BM_POWER_LINREG_OFFSET_DCDC_MODE))
+			return HW_POWER_LINREG_DCDC_OFF;
+	}
+
+	/* If VBUS valid then 5 V power supply present */
+	if (status & BM_POWER_STS_VBUSVALID0_STATUS) {
+		/* Powered by DC-DC, Linreg is on */
+		if (v5ctrl & BM_POWER_5VCTRL_ENABLE_DCDC)
+			return HW_POWER_DCDC_LINREG_ON;
+
+		/* Powered by Linreg, DC-DC is off */
+		return HW_POWER_LINREG_DCDC_OFF;
+	}
+
+	/* DC-DC is on */
+	if (offset & BM_POWER_LINREG_OFFSET_DCDC_MODE) {
+		/* Powered by DC-DC, Linreg is on */
+		if (base & desc->enable_mask)
+			return HW_POWER_DCDC_LINREG_ON;
+
+		/* Powered by DC-DC, Linreg is off */
+		return HW_POWER_DCDC_LINREG_OFF;
+	}
+
+	return HW_POWER_UNKNOWN_SOURCE;
+}
+
+static int mxs_set_dcdc_freq(struct regulator_dev *reg, u32 hz)
+{
+	struct mxs_reg_info *dcdc = rdev_get_drvdata(reg);
+	u32 val;
+	int ret;
+
+	if (dcdc->desc.id != MXS_DCDC) {
+		dev_warn(&reg->dev, "Setting switching freq is not supported\n");
+		return -EINVAL;
+	}
+
+	ret = regmap_read(reg->regmap, HW_POWER_MISC, &val);
+	if (ret)
+		return ret;
+
+	val &= ~BM_POWER_MISC_FREQSEL;
+	val &= ~HW_POWER_MISC_SEL_PLLCLK;
+
+	/*
+	 * Select the PLL/PFD based frequency that the DC-DC converter uses.
+	 * The actual switching frequency driving the power inductor is
+	 * DCDC_CLK/16. Accept only values recommend by Freescale.
+	 */
+	switch (hz) {
+	case 1200000:
+		val |= HW_POWER_MISC_FREQSEL_19200_KHZ << SHIFT_FREQSEL;
+		break;
+	case 1250000:
+		val |= HW_POWER_MISC_FREQSEL_20000_KHZ << SHIFT_FREQSEL;
+		break;
+	case 1500000:
+		val |= HW_POWER_MISC_FREQSEL_24000_KHZ << SHIFT_FREQSEL;
+		break;
+	default:
+		dev_warn(&reg->dev, "Switching freq: %u Hz not supported\n",
+			 hz);
+		return -EINVAL;
+	}
+
+	/* First program FREQSEL */
+	ret = regmap_write(reg->regmap, HW_POWER_MISC, val);
+	if (ret)
+		return ret;
+
+	/* then set PLL as clock for DC-DC converter */
+	val |= HW_POWER_MISC_SEL_PLLCLK;
+
+	return regmap_write(reg->regmap, HW_POWER_MISC, val);
+}
+
+static int mxs_ldo_set_voltage_sel(struct regulator_dev *reg, unsigned sel)
+{
+	struct mxs_reg_info *ldo = rdev_get_drvdata(reg);
+	struct regulator_desc *desc = &ldo->desc;
+	u32 status = 0;
+	int timeout;
+	int ret;
+
+	ret = regmap_update_bits(reg->regmap, desc->vsel_reg, desc->vsel_mask,
+				 sel);
+	if (ret)
+		return ret;
+
+	if (ldo->get_power_source) {
+		switch (ldo->get_power_source(reg)) {
+		case HW_POWER_LINREG_DCDC_OFF:
+		case HW_POWER_LINREG_DCDC_READY:
+		case HW_POWER_EXTERNAL_SOURCE_5V:
+			/*
+			 * Since the DC-DC converter is off we can't
+			 * trigger on DC_OK. So wait at least 1 ms
+			 * for stabilization.
+			 */
+			usleep_range(1000, 2000);
+			return 0;
+		}
+	}
+
+	/* Make sure DC_OK has changed */
+	usleep_range(15, 20);
+
+	for (timeout = 0; timeout < 20; timeout++) {
+		ret = regmap_read(reg->regmap, HW_POWER_STS, &status);
+
+		if (ret)
+			break;
+
+		/* DC-DC converter control loop has stabilized */
+		if (status & BM_POWER_STS_DC_OK)
+			return 0;
+
+		udelay(1);
+	}
+
+	if (!ret)
+		dev_warn_ratelimited(&reg->dev, "%s: timeout status=0x%08x\n",
+				     __func__, status);
+
+	msleep(20);
+
+	return -ETIMEDOUT;
+}
+
+static int mxs_ldo_is_enabled(struct regulator_dev *reg)
+{
+	struct mxs_reg_info *ldo = rdev_get_drvdata(reg);
+
+	if (ldo->get_power_source) {
+		switch (ldo->get_power_source(reg)) {
+		case HW_POWER_LINREG_DCDC_OFF:
+		case HW_POWER_LINREG_DCDC_READY:
+		case HW_POWER_DCDC_LINREG_ON:
+			return 1;
+		}
+	}
+
+	return 0;
+}
+
+static struct regulator_ops mxs_dcdc_ops = {
+	.is_enabled		= regulator_is_enabled_regmap,
+};
+
+static struct regulator_ops mxs_ldo_ops = {
+	.list_voltage		= regulator_list_voltage_linear,
+	.map_voltage		= regulator_map_voltage_linear,
+	.set_voltage_sel	= mxs_ldo_set_voltage_sel,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.is_enabled		= mxs_ldo_is_enabled,
+};
+
+static const struct mxs_reg_info mxs_info_dcdc = {
+	.desc = {
+		.name = "dcdc",
+		.id = MXS_DCDC,
+		.type = REGULATOR_VOLTAGE,
+		.owner = THIS_MODULE,
+		.ops = &mxs_dcdc_ops,
+		.enable_reg = HW_POWER_STS,
+		.enable_mask = (1 << 0),
+	},
+};
+
+static const struct mxs_reg_info imx23_info_vddio = {
+	.desc = {
+		.name = "vddio",
+		.id = MXS_VDDIO,
+		.type = REGULATOR_VOLTAGE,
+		.owner = THIS_MODULE,
+		.n_voltages = 0x20,
+		.uV_step = 25000,
+		.linear_min_sel = 0,
+		.min_uV = 2800000,
+		.vsel_reg = HW_POWER_VDDIOCTRL,
+		.vsel_mask = 0x1f,
+		.ops = &mxs_ldo_ops,
+	},
+	.ctrl_reg = HW_POWER_VDDIOCTRL,
+	.disable_fet_mask = 1 << 16,
+	.linreg_offset_mask = 3 << 12,
+	.linreg_offset_shift = 12,
+	.get_power_source = get_vddio_power_source,
+};
+
+static const struct mxs_reg_info imx28_info_vddio = {
+	.desc = {
+		.name = "vddio",
+		.id = MXS_VDDIO,
+		.type = REGULATOR_VOLTAGE,
+		.owner = THIS_MODULE,
+		.n_voltages = 0x11,
+		.uV_step = 50000,
+		.linear_min_sel = 0,
+		.min_uV = 2800000,
+		.vsel_reg = HW_POWER_VDDIOCTRL,
+		.vsel_mask = 0x1f,
+		.ops = &mxs_ldo_ops,
+	},
+	.ctrl_reg = HW_POWER_VDDIOCTRL,
+	.disable_fet_mask = 1 << 16,
+	.linreg_offset_mask = 3 << 12,
+	.linreg_offset_shift = 12,
+	.get_power_source = get_vddio_power_source,
+};
+
+static const struct mxs_reg_info mxs_info_vdda = {
+	.desc = {
+		.name = "vdda",
+		.id = MXS_VDDA,
+		.type = REGULATOR_VOLTAGE,
+		.owner = THIS_MODULE,
+		.n_voltages = 0x20,
+		.uV_step = 25000,
+		.linear_min_sel = 0,
+		.min_uV = 1500000,
+		.vsel_reg = HW_POWER_VDDACTRL,
+		.vsel_mask = 0x1f,
+		.ops = &mxs_ldo_ops,
+		.enable_mask = (1 << 17),
+	},
+	.ctrl_reg = HW_POWER_VDDACTRL,
+	.disable_fet_mask = 1 << 16,
+	.linreg_offset_mask = 3 << 12,
+	.linreg_offset_shift = 12,
+	.get_power_source = get_vdda_vddd_power_source,
+};
+
+static const struct mxs_reg_info mxs_info_vddd = {
+	.desc = {
+		.name = "vddd",
+		.id = MXS_VDDD,
+		.type = REGULATOR_VOLTAGE,
+		.owner = THIS_MODULE,
+		.n_voltages = 0x20,
+		.uV_step = 25000,
+		.linear_min_sel = 0,
+		.min_uV = 800000,
+		.vsel_reg = HW_POWER_VDDDCTRL,
+		.vsel_mask = 0x1f,
+		.ops = &mxs_ldo_ops,
+		.enable_mask = (1 << 21),
+	},
+	.ctrl_reg = HW_POWER_VDDDCTRL,
+	.disable_fet_mask = 1 << 20,
+	.linreg_offset_mask = 3 << 16,
+	.linreg_offset_shift = 16,
+	.get_power_source = get_vdda_vddd_power_source,
+};
+
+static const struct of_device_id of_mxs_regulator_match[] = {
+	{ .compatible = "fsl,imx23-dcdc",  .data = &mxs_info_dcdc },
+	{ .compatible = "fsl,imx28-dcdc",  .data = &mxs_info_dcdc },
+	{ .compatible = "fsl,imx23-vddio", .data = &imx23_info_vddio },
+	{ .compatible = "fsl,imx23-vdda",  .data = &mxs_info_vdda },
+	{ .compatible = "fsl,imx23-vddd",  .data = &mxs_info_vddd },
+	{ .compatible = "fsl,imx28-vddio", .data = &imx28_info_vddio },
+	{ .compatible = "fsl,imx28-vdda",  .data = &mxs_info_vdda },
+	{ .compatible = "fsl,imx28-vddd",  .data = &mxs_info_vddd },
+	{ /* end */ }
+};
+MODULE_DEVICE_TABLE(of, of_mxs_regulator_match);
+
+static int mxs_regulator_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	const struct of_device_id *match;
+	struct device_node *parent_np;
+	struct regulator_dev *rdev = NULL;
+	struct mxs_reg_info *info;
+	struct regulator_init_data *initdata;
+	struct regulator_config config = { };
+	u32 switch_freq;
+
+	match = of_match_device(of_mxs_regulator_match, dev);
+	if (!match) {
+		/* We do not expect this to happen */
+		dev_err(dev, "%s: Unable to match device\n", __func__);
+		return -ENODEV;
+	}
+
+	info = devm_kmemdup(dev, match->data, sizeof(struct mxs_reg_info),
+			    GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	initdata = of_get_regulator_init_data(dev, dev->of_node, &info->desc);
+	if (!initdata) {
+		dev_err(dev, "missing regulator init data\n");
+		return -EINVAL;
+	}
+
+	parent_np = of_get_parent(dev->of_node);
+	if (!parent_np)
+		return -ENODEV;
+	config.regmap = syscon_node_to_regmap(parent_np);
+	of_node_put(parent_np);
+	if (IS_ERR(config.regmap))
+		return PTR_ERR(config.regmap);
+
+	config.dev = dev;
+	config.init_data = initdata;
+	config.driver_data = info;
+	config.of_node = dev->of_node;
+
+	rdev = devm_regulator_register(dev, &info->desc, &config);
+	if (IS_ERR(rdev)) {
+		int ret = PTR_ERR(rdev);
+
+		dev_err(dev, "%s: failed to register regulator(%d)\n",
+			__func__, ret);
+		return ret;
+	}
+
+	if (!of_property_read_u32(dev->of_node, "switching-frequency",
+				  &switch_freq))
+		mxs_set_dcdc_freq(rdev, switch_freq);
+
+	platform_set_drvdata(pdev, rdev);
+
+	return 0;
+}
+
+static struct platform_driver mxs_regulator_driver = {
+	.driver = {
+		.name	= "mxs_regulator",
+		.of_match_table = of_mxs_regulator_match,
+	},
+	.probe	= mxs_regulator_probe,
+};
+
+module_platform_driver(mxs_regulator_driver);
+
+MODULE_AUTHOR("Stefan Wahren <stefan.wahren@i2se.com>");
+MODULE_DESCRIPTION("Freescale MXS regulators");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:mxs_regulator");
--- a/target/linux/mxs/patches-4.1/103-dt-enable-regulator.patch
+++ b/target/linux/mxs/patches-4.1/103-dt-enable-regulator.patch
@ -0,0 +1,104 @@
+diff --git a/arch/arm/boot/dts/imx23.dtsi b/arch/arm/boot/dts/imx23.dtsi
+index bbcfb5a..efdd702 100644
+--- a/arch/arm/boot/dts/imx23.dtsi
+++ b/arch/arm/boot/dts/imx23.dtsi
+@@ -404,8 +404,46 @@
+ 			};
+ 
+ 			power@80044000 {
+				compatible = "fsl,imx23-power", "syscon";
+ 				reg = <0x80044000 0x2000>;
+-				status = "disabled";
+				interrupts = <3>;
+
+				dcdc: regulator@1 {
+					compatible = "fsl,imx23-dcdc";
+					regulator-name = "dcdc";
+					regulator-boot-on;
+					regulator-always-on;
+				};
+
+				reg_vddd: regulator@2 {
+					compatible = "fsl,imx23-vddd";
+					regulator-name = "vddd";
+					regulator-min-microvolt = <1350000>;
+					regulator-max-microvolt = <1550000>;
+					vddd-supply = <&reg_vdda>;
+					regulator-boot-on;
+					regulator-always-on;
+				};
+
+				reg_vdda: regulator@3 {
+					compatible = "fsl,imx23-vdda";
+					regulator-name = "vdda";
+					regulator-min-microvolt = <1725000>;
+					regulator-max-microvolt = <1950000>;
+					vdda-supply = <&reg_vddio>;
+					regulator-boot-on;
+					regulator-always-on;
+				};
+
+				reg_vddio: regulator@4 {
+					compatible = "fsl,imx23-vddio";
+					regulator-name = "vddio";
+					regulator-min-microvolt = <3000000>;
+					regulator-max-microvolt = <3575000>;
+					regulator-microvolt-offset = <80000>;
+					regulator-boot-on;
+					regulator-always-on;
+				};
+ 			};
+ 
+ 			saif1: saif@80046000 {
+diff --git a/arch/arm/boot/dts/imx28.dtsi b/arch/arm/boot/dts/imx28.dtsi
+index 25e25f8..378b1f2 100644
+--- a/arch/arm/boot/dts/imx28.dtsi
+++ b/arch/arm/boot/dts/imx28.dtsi
+@@ -1035,8 +1035,46 @@
+ 			};
+ 
+ 			power: power@80044000 {
+				compatible = "fsl,imx28-power", "syscon";
+ 				reg = <0x80044000 0x2000>;
+-				status = "disabled";
+				interrupts = <6>;
+
+				dcdc: regulator@1 {
+					compatible = "fsl,imx28-dcdc";
+					regulator-name = "dcdc";
+					regulator-boot-on;
+					regulator-always-on;
+				};
+
+				reg_vddd: regulator@2 {
+					compatible = "fsl,imx28-vddd";
+					regulator-name = "vddd";
+					regulator-min-microvolt = <1350000>;
+					regulator-max-microvolt = <1550000>;
+					vddd-supply = <&reg_vdda>;
+					regulator-boot-on;
+					regulator-always-on;
+				};
+
+				reg_vdda: regulator@3 {
+					compatible = "fsl,imx28-vdda";
+					regulator-name = "vdda";
+					regulator-min-microvolt = <1725000>;
+					regulator-max-microvolt = <1950000>;
+					vdda-supply = <&reg_vddio>;
+					regulator-boot-on;
+					regulator-always-on;
+				};
+
+				reg_vddio: regulator@4 {
+					compatible = "fsl,imx28-vddio";
+					regulator-name = "vddio";
+					regulator-min-microvolt = <3000000>;
+					regulator-max-microvolt = <3550000>;
+					regulator-microvolt-offset = <80000>;
+					regulator-boot-on;
+					regulator-always-on;
+				};
+ 			};
+ 
+ 			saif1: saif@80046000 {
--- a/target/linux/mxs/patches-4.1/120-dt-add-i2c.patch
+++ b/target/linux/mxs/patches-4.1/120-dt-add-i2c.patch
@ -0,0 +1,55 @@
+--- a/arch/arm/boot/dts/imx23.dtsi
+++ b/arch/arm/boot/dts/imx23.dtsi
+@@ -146,6 +146,39 @@
+ 					fsl,pull-up = <MXS_PULL_DISABLE>;
+ 				};
+ 
+				i2c0_pins_a: i2c0@0 {
+					reg = <0>;
+					fsl,pinmux-ids = <
+						0x01e0 /* MX23_PAD_I2C_SCL__I2C_SCL */
+						0x01f0 /* MX23_PAD_I2C_SDA__I2C_SDA */
+					>;
+					fsl,drive-strength = <1>;
+					fsl,voltage = <1>;
+					fsl,pull-up = <1>;
+				};
+
+				i2c1_pins_a: i2c1@0 {
+					reg = <0>;
+					fsl,pinmux-ids = <
+						0x1171 /* MX23_PAD_LCD_ENABLE__I2C_SCL */
+						0x1181 /* MX23_PAD_LCD_HSYNC__I2C_SDA  */
+					>;
+					fsl,drive-strength = <1>;
+					fsl,voltage = <1>;
+					fsl,pull-up = <1>;
+				};
+
+				i2c2_pins_a: i2c2@0 {
+					reg = <0>;
+					fsl,pinmux-ids = <
+						0x2031 /* MX23_PAD_SSP1_DATA1__I2C_SCL  */
+						0x2041 /* MX23_PAD_SSP1_DATA2__I2C_SDA  */
+					>;
+					fsl,drive-strength = <1>;
+					fsl,voltage = <1>;
+					fsl,pull-up = <1>;
+				};
+
+ 				auart0_pins_a: auart0@0 {
+ 					reg = <0>;
+ 					fsl,pinmux-ids = <
+@@ -444,7 +477,12 @@
+ 			};
+ 
+ 			i2c@80058000 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				compatible = "fsl,imx23-i2c";
+ 				reg = <0x80058000 0x2000>;
+				interrupts = <27>;
+				clock-frequency = <100000>;
+ 				dmas = <&dma_apbx 3>;
+ 				dma-names = "rx-tx";
+ 				status = "disabled";