Merge branch 'tracking-qcomlt-nvmem' into integration-linux-qcomlt

* tracking-qcomlt-nvmem:
  WIP: nvmem: fix kbuild warnings
  nvmem: Add to MAINTAINERS for nvmem framework
  nvmem: sunxi: Move the SID driver to the nvmem framework
  nvmem: qfprom: Add bindings for qfprom
  nvmem: qfprom: Add Qualcomm QFPROM support.
  Documentation: nvmem: add nvmem api level and how-to doc
  nvmem: Add bindings for simple nvmem framework
  nvmem: Add nvmem_device based consumer apis.
  nvmem: Add a simple NVMEM framework for consumers
  nvmem: Add a simple NVMEM framework for nvmem providers
  regmap: Introduce regmap_get_reg_stride.
  regmap: Introduce regmap_get_max_register.

20 files changed, 1891 insertions, 192 deletions

diff --git a/Documentation/ABI/testing/sysfs-driver-sunxi-sid b/Documentation/ABI/testing/sysfs-driver-sunxi-sid
deleted file mode 100644
index ffb9536f6ecc..000000000000
--- a/Documentation/ABI/testing/sysfs-driver-sunxi-sid
+++ /dev/null
@@ -1,22 +0,0 @@
-What:		/sys/devices/*/<our-device>/eeprom
-Date:		August 2013
-Contact:	Oliver Schinagl <oliver@schinagl.nl>
-Description:	read-only access to the SID (Security-ID) on current
-		A-series SoC's from Allwinner. Currently supports A10, A10s, A13
-		and A20 CPU's. The earlier A1x series of SoCs exports 16 bytes,
-		whereas the newer A20 SoC exposes 512 bytes split into sections.
-		Besides the 16 bytes of SID, there's also an SJTAG area,
-		HDMI-HDCP key and some custom keys. Below a quick overview, for
-		details see the user manual:
-		0x000  128 bit root-key (sun[457]i)
-		0x010  128 bit boot-key (sun7i)
-		0x020   64 bit security-jtag-key (sun7i)
-		0x028   16 bit key configuration (sun7i)
-		0x02b   16 bit custom-vendor-key (sun7i)
-		0x02c  320 bit low general key (sun7i)
-		0x040   32 bit read-control access (sun7i)
-		0x064  224 bit low general key (sun7i)
-		0x080 2304 bit HDCP-key (sun7i)
-		0x1a0  768 bit high general key (sun7i)
-Users:		any user space application which wants to read the SID on
-		Allwinner's A-series of CPU's.
diff --git a/Documentation/devicetree/bindings/misc/allwinner,sunxi-sid.txt b/Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt
index fabdf64a5737..d543ed3f5363 100644
--- a/Documentation/devicetree/bindings/misc/allwinner,sunxi-sid.txt
+++ b/Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt
@@ -4,6 +4,10 @@ Required properties:
 - compatible: "allwinner,sun4i-a10-sid" or "allwinner,sun7i-a20-sid"
 - reg: Should contain registers location and length
 
+= Data cells =
+Are child nodes of qfprom, bindings of which as described in
+bindings/nvmem/nvmem.txt
+
 Example for sun4i:
 	sid@01c23800 {
 		compatible = "allwinner,sun4i-a10-sid";
diff --git a/Documentation/devicetree/bindings/nvmem/nvmem.txt b/Documentation/devicetree/bindings/nvmem/nvmem.txt
new file mode 100644
index 000000000000..d1a37e7b1068
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/nvmem.txt
@@ -0,0 +1,85 @@
+= NVMEM(Non Volatile Memory) Data Device Tree Bindings =
+
+This binding is intended to represent the location of hardware
+configuration data stored in NVMEMs like eeprom, efuses and so on.
+
+On a significant proportion of boards, the manufacturer has stored
+some data on NVMEM, for the OS to be able to retrieve these information
+and act upon it. Obviously, the OS has to know about where to retrieve
+these data from, and where they are stored on the storage device.
+
+This document is here to document this.
+
+= Data providers =
+Contains bindings specific to provider drivers and data cells as children
+of this node.
+
+Optional properties:
+ read-only: Mark the provider as read only.
+
+= Data cells =
+These are the child nodes of the provider which contain data cell
+information like offset and size in nvmem provider.
+
+Required properties:
+reg:	specifies the offset in byte within that storage device, start bit
+	in the byte and the length in bits of the data we care about.
+	There could be more than one offset-length pairs in this property.
+
+Optional properties:
+
+bit-offset: specifies the offset in bit within the address range specified
+	by reg property. Can take values from 0-7.
+nbits: specifies number of bits this cell occupies starting from bit-offset.
+
+For example:
+
+	/* Provider */
+	qfprom: qfprom@00700000 {
+		...
+
+		/* Data cells */
+		tsens_calibration: calib@404 {
+			reg = <0x404 0x10>;
+		};
+
+		tsens_calibration_bckp: calib_bckp@504 {
+			reg = <0x504 0x11>;
+			bit-offset = 6;
+			nbits = 128;
+		};
+
+		pvs_version: pvs-version@6 {
+			reg = <0x6 0x2>
+			bit-offset = 7;
+			nbits = 2;
+		};
+
+		speed_bin: speed-bin@c{
+			reg = <0xc 0x1>;
+			bit-offset = 2;
+			nbits	= 3;
+
+		};
+		...
+	};
+
+= Data consumers =
+Are device nodes which consume nvmem data cells/providers.
+
+Required-properties:
+nvmem-cell: list of phandle to the nvmem data cells.
+nvmem-cell-names: names for the each nvmem-cell specified. Required if
+	nvmem-cell is used.
+
+Optional-properties:
+nvmem	: list of phandles to nvmem providers.
+nvmem-names: names for the each nvmem provider. required if nvmem is used.
+
+For example:
+
+	tsens {
+		...
+		nvmem-cell = <&tsens_calibration>;
+		nvmem-cell-names = "calibration";
+	};
diff --git a/Documentation/devicetree/bindings/nvmem/qfprom.txt b/Documentation/devicetree/bindings/nvmem/qfprom.txt
new file mode 100644
index 000000000000..8a8d55fb2b67
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/qfprom.txt
@@ -0,0 +1,35 @@
+= Qualcomm QFPROM device tree bindings =
+
+This binding is intended to represent QFPROM which is found in most QCOM SOCs.
+
+Required properties:
+- compatible: should be "qcom,qfprom"
+- reg: Should contain registers location and length
+
+= Data cells =
+Are child nodes of qfprom, bindings of which as described in
+bindings/nvmem/nvmem.txt
+
+Example:
+
+	qfprom: qfprom@00700000 {
+		compatible 	= "qcom,qfprom";
+		reg		= <0x00700000 0x8000>;
+		...
+		/* Data cells */
+		tsens_calibration: calib@404 {
+			reg = <0x4404 0x10>;
+		};
+	};
+
+
+= Data consumers =
+Are device nodes which consume nvmem data cells.
+
+For example:
+
+	tsens {
+		...
+		nvmem-cell = <&tsens_calibration>;
+		nvmem-cell-names = "calibration";
+	};
diff --git a/Documentation/nvmem/nvmem.txt b/Documentation/nvmem/nvmem.txt
new file mode 100644
index 000000000000..28b357976143
--- /dev/null
+++ b/Documentation/nvmem/nvmem.txt
@@ -0,0 +1,151 @@
+			    NVMEM SUBSYSTEM
+	  Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+
+This document explains the Simple NVMEM Framework along with the APIs provided,
+and how-to-use.
+
+1. Introduction
+===============
+*NVMEM* is the abbreviation for Non Volatile Memory layer. It is used to
+retrieve configuration or SOC or Device specific data from a non volatile memories
+like eeprom, efuses and so on.
+
+Up until now, NVMEM drivers like eeprom were stored in drivers/misc, where they
+all had to duplicate pretty much the same code to register a sysfs file, allow
+in-kernel users to access the content of the devices they were driving, etc.
+
+This was also a problem as far as other in-kernel users were involved, since
+the solutions used were pretty much different from on driver to another, there
+was a rather big abstraction leak.
+
+Introduction of this framework aims at solving this. It also introduces DT
+representation for consumer devices to go get the data they require (MAC
+Addresses, SoC/Revision ID, part numbers, and so on) from the NVMEMs.
+This framework is based on regmap, so that most of the abstraction
+available in regmap can be reused, across multiple types of buses.
+
+NVMEM Providers
++++++++++++++++
+
+NVMEM provider refers to an entity that implements methods to initialize, read
+and write the non-volatile memory.
+
+2. Registering/Unregistering the NVMEM provider
+===============================================
+
+A NVMEM provider can register with NVMEM core by suppling relevant
+nvmem configuration to nvmem_register(), on success core would return a valid
+nvmem_device pointer.
+
+nvmem_unregister(nvmem) is used to unregister the already registered provider.
+
+For example for simple qfprom case:
+
+static struct nvmem_config econfig = {
+	.name = "qfprom",
+	.owner = THIS_MODULE,
+};
+
+static int qfprom_probe(struct platform_device *pdev)
+{
+	...
+	econfig.dev = &pdev->dev;
+	nvmem = nvmem_register(&econfig);
+	...
+}
+
+It is mandatory that the NVMEM provider has a regmap associated with its
+struct device.
+
+NVMEM Consumers
++++++++++++++++
+
+NVMEM consumers are the entities which make use of the NVMEM provider to
+read/write into NVMEM.
+
+3. NVMEM cell based consumer APIs.
+=================================
+
+NVMEM cells are the data entries/fields in the NVMEM.
+The NVMEM framework provides 3 APIs to read/write NVMEM cells.
+
+struct nvmem_cell *nvmem_cell_get(struct device *dev, const char *name);
+struct nvmem_cell *devm_nvmem_cell_get(struct device *dev, const char *name);
+
+void nvmem_cell_put(struct nvmem_cell *cell);
+void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell);
+
+void *nvmem_cell_read(struct nvmem_cell *cell, ssize_t *len);
+int nvmem_cell_write(struct nvmem_cell *cell, void *buf, ssize_t len);
+
+*nvmem_cell_get() apis will get a reference to nvmem cell for a given id,
+and nvmem_cell_read/write() can then directly read or write to the cell.
+Once the usage of the cell is finished the consumer should call *nvmem_cell_put()
+to free all the allocation memory for the cell.
+
+4. Direct NVMEM device based consumer APIs.
+==========================================
+
+In some instances it is necessary to directly read/write the NVMEM.
+To facilitate such consumers NVMEM framework provides below apis.
+
+struct nvmem_device *nvmem_device_get(struct device *dev, const char *name);
+struct nvmem_device *devm_nvmem_device_get(struct device *dev,
+					   const char *name);
+void nvmem_device_put(struct nvmem_device *nvmem);
+int nvmem_device_read(struct nvmem_device *nvmem, unsigned int offset,
+		      size_t bytes, void *buf);
+int nvmem_device_write(struct nvmem_device *nvmem, unsigned int offset,
+		       size_t bytes, void *buf);
+int nvmem_device_cell_read(struct nvmem_device *nvmem,
+			   struct nvmem_cell_info *info, void *buf);
+int nvmem_device_cell_write(struct nvmem_device *nvmem,
+			    struct nvmem_cell_info *info, void *buf);
+
+Before the consumers can read/write NVMEM directly, it should get hold
+of nvmem_controller from one of the *nvmem_device_get() api.
+
+Difference between these apis and cell based apis is that these apis
+always take nvmem_device as parameter.
+
+5. Releasing a reference to the NVMEM
+=====================================
+
+When the consumers no longer needs the NVMEM, it has to release the reference
+to the NVMEM it has obtained using the APIs mentioned in the above section.
+NVMEM framework provides 2 APIs to release a reference to the NVMEM.
+
+void nvmem_cell_put(struct nvmem_cell *cell);
+void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell);
+void nvmem_device_put(struct nvmem_device *nvmem);
+void devm_nvmem_device_put(struct device *dev, struct nvmem_device *nvmem);
+
+Both these APIs are used to release a reference to the NVMEM and
+devm_nvmem_cell_put and devm_nvmem_device_put destroys the devres associated
+with this NVMEM.
+
+Userspace
++++++++++
+
+6. Userspace binary interface.
+==============================
+
+Userspace can read/write the raw NVMEM file located at /sys/class/nvmem/*/nvmem
+
+ex:
+
+hexdump /sys/class/nvmem/qfprom0/nvmem
+
+0000000 0000 0000 0000 0000 0000 0000 0000 0000
+*
+00000a0 db10 2240 0000 e000 0c00 0c00 0000 0c00
+0000000 0000 0000 0000 0000 0000 0000 0000 0000
+...
+*
+0001000
+
+7. DeviceTree Binding
+=====================
+
+The documentation for NVMEM dt binding can be found @
+Documentation/devicetree/bindings/nvmem/nvmem.txt
diff --git a/MAINTAINERS b/MAINTAINERS
index d8afd2953678..ac50c4cee4cc 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7012,6 +7012,15 @@ S:	Supported
 F:	drivers/block/nvme*
 F:	include/linux/nvme.h
 
+NVMEM FRAMEWORK
+M:	Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+M:	Maxime Ripard <maxime.ripard@free-electrons.com>
+S:	Maintained
+F:	drivers/nvmem/
+F:	Documentation/devicetree/bindings/nvmem/
+F:	include/linux/nvmem-provider.h
+F:	include/linux/nvmem-consumer.h
+
 NXP-NCI NFC DRIVER
 M:	Clément Perrochaud <clement.perrochaud@effinnov.com>
 R:	Charles Gorand <charles.gorand@effinnov.com>
diff --git a/drivers/Kconfig b/drivers/Kconfig
index c0cc96bab9e7..69d730501e48 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -182,4 +182,6 @@ source "drivers/thunderbolt/Kconfig"
 
 source "drivers/android/Kconfig"
 
+source "drivers/nvmem/Kconfig"
+
 endmenu
diff --git a/drivers/Makefile b/drivers/Makefile
index 46d2554be404..f86b8976fb78 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -165,3 +165,4 @@ obj-$(CONFIG_RAS)		+= ras/
 obj-$(CONFIG_THUNDERBOLT)	+= thunderbolt/
 obj-$(CONFIG_CORESIGHT)		+= hwtracing/coresight/
 obj-$(CONFIG_ANDROID)		+= android/
+obj-$(CONFIG_NVMEM)		+= nvmem/
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 6273ff072f3e..e5eef6f1408a 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -2613,6 +2613,30 @@ int regmap_get_val_bytes(struct regmap *map)
 }
 EXPORT_SYMBOL_GPL(regmap_get_val_bytes);
 
+/**
+ * regmap_get_max_register(): Report the max register value
+ *
+ * Report the max register value, mainly intended to for use by
+ * generic infrastructure built on top of regmap.
+ */
+int regmap_get_max_register(struct regmap *map)
+{
+	return map->max_register ? map->max_register : -EINVAL;
+}
+EXPORT_SYMBOL_GPL(regmap_get_max_register);
+
+/**
+ * regmap_get_reg_stride(): Report the register address stride
+ *
+ * Report the register address stride, mainly intended to for use by
+ * generic infrastructure built on top of regmap.
+ */
+int regmap_get_reg_stride(struct regmap *map)
+{
+	return map->reg_stride;
+}
+EXPORT_SYMBOL_GPL(regmap_get_reg_stride);
+
 int regmap_parse_val(struct regmap *map, const void *buf,
 			unsigned int *val)
 {
diff --git a/drivers/misc/eeprom/Kconfig b/drivers/misc/eeprom/Kconfig
index 9536852fd4c6..04f2e1fa9dd1 100644
--- a/drivers/misc/eeprom/Kconfig
+++ b/drivers/misc/eeprom/Kconfig
@@ -96,17 +96,4 @@ config EEPROM_DIGSY_MTC_CFG
 
 	  If unsure, say N.
 
-config EEPROM_SUNXI_SID
-	tristate "Allwinner sunxi security ID support"
-	depends on ARCH_SUNXI && SYSFS
-	help
-	  This is a driver for the 'security ID' available on various Allwinner
-	  devices.
-
-	  Due to the potential risks involved with changing e-fuses,
-	  this driver is read-only.
-
-	  This driver can also be built as a module. If so, the module
-	  will be called sunxi_sid.
-
 endmenu
diff --git a/drivers/misc/eeprom/Makefile b/drivers/misc/eeprom/Makefile
index 9507aec95e94..fc1e81d29267 100644
--- a/drivers/misc/eeprom/Makefile
+++ b/drivers/misc/eeprom/Makefile
@@ -4,5 +4,4 @@ obj-$(CONFIG_EEPROM_LEGACY)	+= eeprom.o
 obj-$(CONFIG_EEPROM_MAX6875)	+= max6875.o
 obj-$(CONFIG_EEPROM_93CX6)	+= eeprom_93cx6.o
 obj-$(CONFIG_EEPROM_93XX46)	+= eeprom_93xx46.o
-obj-$(CONFIG_EEPROM_SUNXI_SID)	+= sunxi_sid.o
 obj-$(CONFIG_EEPROM_DIGSY_MTC_CFG) += digsy_mtc_eeprom.o
diff --git a/drivers/misc/eeprom/sunxi_sid.c b/drivers/misc/eeprom/sunxi_sid.c
deleted file mode 100644
index 8385177ff32b..000000000000
--- a/drivers/misc/eeprom/sunxi_sid.c
+++ /dev/null
@@ -1,156 +0,0 @@
-/*
- * Copyright (c) 2013 Oliver Schinagl <oliver@schinagl.nl>
- * http://www.linux-sunxi.org
- *
- * 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.
- *
- * This driver exposes the Allwinner security ID, efuses exported in byte-
- * sized chunks.
- */
-
-#include <linux/compiler.h>
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/export.h>
-#include <linux/fs.h>
-#include <linux/io.h>
-#include <linux/kernel.h>
-#include <linux/kobject.h>
-#include <linux/module.h>
-#include <linux/of_device.h>
-#include <linux/platform_device.h>
-#include <linux/random.h>
-#include <linux/slab.h>
-#include <linux/stat.h>
-#include <linux/sysfs.h>
-#include <linux/types.h>
-
-#define DRV_NAME "sunxi-sid"
-
-struct sunxi_sid_data {
-	void __iomem *reg_base;
-	unsigned int keysize;
-};
-
-/* We read the entire key, due to a 32 bit read alignment requirement. Since we
- * want to return the requested byte, this results in somewhat slower code and
- * uses 4 times more reads as needed but keeps code simpler. Since the SID is
- * only very rarely probed, this is not really an issue.
- */
-static u8 sunxi_sid_read_byte(const struct sunxi_sid_data *sid_data,
-			      const unsigned int offset)
-{
-	u32 sid_key;
-
-	if (offset >= sid_data->keysize)
-		return 0;
-
-	sid_key = ioread32be(sid_data->reg_base + round_down(offset, 4));
-	sid_key >>= (offset % 4) * 8;
-
-	return sid_key; /* Only return the last byte */
-}
-
-static ssize_t sid_read(struct file *fd, struct kobject *kobj,
-			struct bin_attribute *attr, char *buf,
-			loff_t pos, size_t size)
-{
-	struct platform_device *pdev;
-	struct sunxi_sid_data *sid_data;
-	int i;
-
-	pdev = to_platform_device(kobj_to_dev(kobj));
-	sid_data = platform_get_drvdata(pdev);
-
-	if (pos < 0 || pos >= sid_data->keysize)
-		return 0;
-	if (size > sid_data->keysize - pos)
-		size = sid_data->keysize - pos;
-
-	for (i = 0; i < size; i++)
-		buf[i] = sunxi_sid_read_byte(sid_data, pos + i);
-
-	return i;
-}
-
-static struct bin_attribute sid_bin_attr = {
-	.attr = { .name = "eeprom", .mode = S_IRUGO, },
-	.read = sid_read,
-};
-
-static int sunxi_sid_remove(struct platform_device *pdev)
-{
-	device_remove_bin_file(&pdev->dev, &sid_bin_attr);
-	dev_dbg(&pdev->dev, "driver unloaded\n");
-
-	return 0;
-}
-
-static const struct of_device_id sunxi_sid_of_match[] = {
-	{ .compatible = "allwinner,sun4i-a10-sid", .data = (void *)16},
-	{ .compatible = "allwinner,sun7i-a20-sid", .data = (void *)512},
-	{/* sentinel */},
-};
-MODULE_DEVICE_TABLE(of, sunxi_sid_of_match);
-
-static int sunxi_sid_probe(struct platform_device *pdev)
-{
-	struct sunxi_sid_data *sid_data;
-	struct resource *res;
-	const struct of_device_id *of_dev_id;
-	u8 *entropy;
-	unsigned int i;
-
-	sid_data = devm_kzalloc(&pdev->dev, sizeof(struct sunxi_sid_data),
-				GFP_KERNEL);
-	if (!sid_data)
-		return -ENOMEM;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	sid_data->reg_base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(sid_data->reg_base))
-		return PTR_ERR(sid_data->reg_base);
-
-	of_dev_id = of_match_device(sunxi_sid_of_match, &pdev->dev);
-	if (!of_dev_id)
-		return -ENODEV;
-	sid_data->keysize = (int)of_dev_id->data;
-
-	platform_set_drvdata(pdev, sid_data);
-
-	sid_bin_attr.size = sid_data->keysize;
-	if (device_create_bin_file(&pdev->dev, &sid_bin_attr))
-		return -ENODEV;
-
-	entropy = kzalloc(sizeof(u8) * sid_data->keysize, GFP_KERNEL);
-	for (i = 0; i < sid_data->keysize; i++)
-		entropy[i] = sunxi_sid_read_byte(sid_data, i);
-	add_device_randomness(entropy, sid_data->keysize);
-	kfree(entropy);
-
-	dev_dbg(&pdev->dev, "loaded\n");
-
-	return 0;
-}
-
-static struct platform_driver sunxi_sid_driver = {
-	.probe = sunxi_sid_probe,
-	.remove = sunxi_sid_remove,
-	.driver = {
-		.name = DRV_NAME,
-		.of_match_table = sunxi_sid_of_match,
-	},
-};
-module_platform_driver(sunxi_sid_driver);
-
-MODULE_AUTHOR("Oliver Schinagl <oliver@schinagl.nl>");
-MODULE_DESCRIPTION("Allwinner sunxi security id driver");
-MODULE_LICENSE("GPL");
diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig
new file mode 100644
index 000000000000..b3a640510fed
--- /dev/null
+++ b/drivers/nvmem/Kconfig
@@ -0,0 +1,36 @@
+menuconfig NVMEM
+	tristate "NVMEM Support"
+	select REGMAP
+	help
+	  Support for NVMEM devices.
+
+	  This framework is designed to provide a generic interface to NVMEM
+	  from both the Linux Kernel and the userspace.
+
+	  If unsure, say no.
+
+if NVMEM
+
+config QCOM_QFPROM
+	tristate "QCOM QFPROM Support"
+	depends on ARCH_QCOM || COMPILE_TEST
+	select REGMAP_MMIO
+	help
+	  Say y here to enable QFPROM support. The QFPROM provides access
+	  functions for QFPROM data to rest of the drivers via nvmem interface.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called nvmem-qfprom.
+
+config NVMEM_SUNXI_SID
+	tristate "Allwinner SoCs SID support"
+	depends on ARCH_SUNXI
+	select REGMAP_MMIO
+	help
+	  This is a driver for the 'security ID' available on various Allwinner
+	  devices.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called eeprom-sunxi-sid.
+
+endif
diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile
new file mode 100644
index 000000000000..7d18489fcee6
--- /dev/null
+++ b/drivers/nvmem/Makefile
@@ -0,0 +1,12 @@
+#
+# Makefile for nvmem drivers.
+#
+
+obj-$(CONFIG_NVMEM)		+= nvmem_core.o
+nvmem_core-y			:= core.o
+
+# Devices
+obj-$(CONFIG_QCOM_QFPROM)	+= nvmem_qfprom.o
+nvmem_qfprom-y			:= qfprom.o
+obj-$(CONFIG_NVMEM_SUNXI_SID)	+= nvmem-sunxi-sid.o
+nvmem-sunxi-sid-y		:= sunxi-sid.o
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
new file mode 100644
index 000000000000..ac152f054fe5
--- /dev/null
+++ b/drivers/nvmem/core.c
@@ -0,0 +1,1069 @@
+/*
+ * nvmem framework core.
+ *
+ * Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+ * Copyright (C) 2013 Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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.
+ */
+
+#include <linux/device.h>
+#include <linux/nvmem-provider.h>
+#include <linux/nvmem-consumer.h>
+#include <linux/export.h>
+#include <linux/fs.h>
+#include <linux/idr.h>
+#include <linux/init.h>
+#include <linux/regmap.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+
+struct nvmem_device {
+	const char		*name;
+	struct regmap		*regmap;
+	struct module		*owner;
+	struct device		dev;
+	int			stride;
+	int			word_size;
+	int			ncells;
+	int			id;
+	int			users;
+	size_t			size;
+	bool			read_only;
+};
+
+struct nvmem_cell {
+	const char *name;
+	int			offset;
+	int			bytes;
+	int			bit_offset;
+	int			nbits;
+	struct nvmem_device	*nvmem;
+	struct list_head	node;
+};
+
+static DEFINE_MUTEX(nvmem_mutex);
+static DEFINE_IDA(nvmem_ida);
+
+static LIST_HEAD(nvmem_cells);
+static DEFINE_MUTEX(nvmem_cells_mutex);
+
+#define to_nvmem_device(d) container_of(d, struct nvmem_device, dev)
+
+static ssize_t bin_attr_nvmem_read(struct file *filp, struct kobject *kobj,
+				    struct bin_attribute *attr,
+				    char *buf, loff_t pos, size_t count)
+{
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct nvmem_device *nvmem = to_nvmem_device(dev);
+	int rc;
+
+	/* Stop the user from reading */
+	if (pos > nvmem->size)
+		return 0;
+
+	if (pos + count > nvmem->size)
+		count = nvmem->size - pos;
+
+	count = count/nvmem->word_size * nvmem->word_size;
+
+	rc = regmap_raw_read(nvmem->regmap, pos, buf, count);
+
+	if (IS_ERR_VALUE(rc))
+		return rc;
+
+	return count;
+}
+
+static ssize_t bin_attr_nvmem_write(struct file *filp, struct kobject *kobj,
+				     struct bin_attribute *attr,
+				     char *buf, loff_t pos, size_t count)
+{
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct nvmem_device *nvmem = to_nvmem_device(dev);
+	int rc;
+
+	/* Stop the user from writing */
+	if (pos > nvmem->size)
+		return 0;
+
+	if (pos + count > nvmem->size)
+		count = nvmem->size - pos;
+
+	count = count/nvmem->word_size * nvmem->word_size;
+
+	rc = regmap_raw_write(nvmem->regmap, pos, buf, count);
+
+	if (IS_ERR_VALUE(rc))
+		return rc;
+
+	return count;
+}
+
+/* default read/write permissions */
+static struct bin_attribute bin_attr_nvmem = {
+	.attr	= {
+		.name	= "nvmem",
+		.mode	= S_IWUSR | S_IRUGO,
+	},
+	.read	= bin_attr_nvmem_read,
+	.write	= bin_attr_nvmem_write,
+};
+
+static struct bin_attribute *nvmem_bin_attributes[] = {
+	&bin_attr_nvmem,
+	NULL,
+};
+
+static const struct attribute_group nvmem_bin_group = {
+	.bin_attrs	= nvmem_bin_attributes,
+};
+
+static const struct attribute_group *nvmem_dev_groups[] = {
+	&nvmem_bin_group,
+	NULL,
+};
+
+/* read only permission */
+static struct bin_attribute bin_attr_ro_nvmem = {
+	.attr	= {
+		.name	= "nvmem",
+		.mode	= S_IRUGO,
+	},
+	.read	= bin_attr_nvmem_read,
+};
+
+static struct bin_attribute *nvmem_bin_ro_attributes[] = {
+	&bin_attr_ro_nvmem,
+	NULL,
+};
+static const struct attribute_group nvmem_bin_ro_group = {
+	.bin_attrs	= nvmem_bin_ro_attributes,
+};
+
+static void nvmem_release(struct device *dev)
+{
+	struct nvmem_device *nvmem = to_nvmem_device(dev);
+
+	ida_simple_remove(&nvmem_ida, nvmem->id);
+	kfree(nvmem);
+}
+
+static struct class nvmem_class = {
+	.name		= "nvmem",
+	.dev_groups	= nvmem_dev_groups,
+	.dev_release	= nvmem_release,
+};
+
+static int of_nvmem_match(struct device *dev, const void *nvmem_np)
+{
+	return dev->of_node == nvmem_np;
+}
+
+static struct nvmem_device *of_nvmem_find(struct device_node *nvmem_np)
+{
+	struct device *d;
+
+	if (!nvmem_np)
+		return NULL;
+
+	d = class_find_device(&nvmem_class, NULL, nvmem_np, of_nvmem_match);
+
+	return d ? to_nvmem_device(d) : NULL;
+}
+
+static struct nvmem_cell *nvmem_find_cell(const char *cell_id)
+{
+	struct nvmem_cell *p;
+
+	list_for_each_entry(p, &nvmem_cells, node)
+		if (p && !strcmp(p->name, cell_id))
+			return p;
+
+	return NULL;
+}
+
+static void nvmem_cell_drop(struct nvmem_cell *cell)
+{
+	mutex_lock(&nvmem_cells_mutex);
+	list_del(&cell->node);
+	mutex_unlock(&nvmem_cells_mutex);
+	kfree(cell);
+}
+
+static void nvmem_device_remove_all_cells(struct nvmem_device *nvmem)
+{
+	struct nvmem_cell *cell;
+	struct list_head *p, *n;
+
+	list_for_each_safe(p, n, &nvmem_cells) {
+		cell = list_entry(p, struct nvmem_cell, node);
+		if (cell->nvmem == nvmem)
+			nvmem_cell_drop(cell);
+	}
+}
+
+static void nvmem_cell_add(struct nvmem_cell *cell)
+{
+	mutex_lock(&nvmem_cells_mutex);
+	list_add_tail(&cell->node, &nvmem_cells);
+	mutex_unlock(&nvmem_cells_mutex);
+}
+
+static int nvmem_cell_info_to_nvmem_cell(struct nvmem_device *nvmem,
+				   struct nvmem_cell_info *info,
+				   struct nvmem_cell *cell)
+{
+	cell->nvmem = nvmem;
+	cell->offset = info->offset;
+	cell->bytes = info->bytes;
+	cell->name = info->name;
+
+	cell->bit_offset = info->bit_offset;
+	cell->nbits = info->nbits;
+
+	if (cell->nbits)
+		cell->bytes = DIV_ROUND_UP(cell->nbits + cell->bit_offset,
+					   BITS_PER_BYTE);
+
+	if (!IS_ALIGNED(cell->offset, nvmem->stride)) {
+		dev_err(&nvmem->dev,
+			"cell %s unaligned to nvmem stride %d\n",
+			cell->name, nvmem->stride);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int nvmem_add_cells(struct nvmem_device *nvmem,
+			   struct nvmem_config *cfg)
+{
+	struct nvmem_cell **cells;
+	struct nvmem_cell_info *info = cfg->cells;
+	int i, rval;
+
+	cells = kzalloc(sizeof(*cells) * cfg->ncells, GFP_KERNEL);
+	if (!cells)
+		return -ENOMEM;
+
+	for (i = 0; i < cfg->ncells; i++) {
+		cells[i] = kzalloc(sizeof(**cells), GFP_KERNEL);
+		if (!cells[i]) {
+			rval = -ENOMEM;
+			goto err;
+		}
+
+		rval = nvmem_cell_info_to_nvmem_cell(nvmem, &info[i], cells[i]);
+		if (IS_ERR_VALUE(rval)) {
+			kfree(cells[i]);
+			goto err;
+		}
+
+		nvmem_cell_add(cells[i]);
+	}
+
+	nvmem->ncells = cfg->ncells;
+	/* remove tmp array */
+	kfree(cells);
+
+	return 0;
+err:
+	while (--i)
+		nvmem_cell_drop(cells[i]);
+
+	return rval;
+}
+
+/**
+ * nvmem_register() - Register a nvmem device for given nvmem_config.
+ * Also creates an binary entry in /sys/class/nvmem/dev-name/nvmem
+ *
+ * @config: nvmem device configuration with which nvmem device is created.
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer
+ * to nvmem_device.
+ */
+
+struct nvmem_device *nvmem_register(struct nvmem_config *config)
+{
+	struct nvmem_device *nvmem;
+	struct regmap *rm;
+	int rval;
+
+	if (!config->dev)
+		return ERR_PTR(-EINVAL);
+
+	rm = dev_get_regmap(config->dev, NULL);
+	if (!rm) {
+		dev_err(config->dev, "Regmap not found\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	nvmem = kzalloc(sizeof(*nvmem), GFP_KERNEL);
+	if (!nvmem)
+		return ERR_PTR(-ENOMEM);
+
+	nvmem->id = ida_simple_get(&nvmem_ida, 0, 0, GFP_KERNEL);
+	if (nvmem->id < 0) {
+		kfree(nvmem);
+		return ERR_PTR(nvmem->id);
+	}
+
+	nvmem->regmap = rm;
+	nvmem->owner = config->owner;
+	nvmem->stride = regmap_get_reg_stride(rm);
+	nvmem->word_size = regmap_get_val_bytes(rm);
+	nvmem->size = regmap_get_max_register(rm) + nvmem->stride;
+	nvmem->dev.class = &nvmem_class;
+	nvmem->dev.parent = config->dev;
+	nvmem->dev.of_node = config->dev->of_node;
+	dev_set_name(&nvmem->dev, "%s%d",
+		     config->name ? : "nvmem", config->id);
+
+	nvmem->read_only = nvmem->dev.of_node ?
+				of_property_read_bool(nvmem->dev.of_node,
+				"read-only") :
+				config->read_only;
+
+	device_initialize(&nvmem->dev);
+
+	dev_dbg(&nvmem->dev, "Registering nvmem device %s\n",
+		dev_name(&nvmem->dev));
+
+	rval = device_add(&nvmem->dev);
+	if (rval) {
+		ida_simple_remove(&nvmem_ida, nvmem->id);
+		kfree(nvmem);
+		return ERR_PTR(rval);
+	}
+
+	/* update sysfs attributes */
+	if (nvmem->read_only)
+		sysfs_update_group(&nvmem->dev.kobj, &nvmem_bin_ro_group);
+
+	if (config->cells)
+		nvmem_add_cells(nvmem, config);
+
+	return nvmem;
+}
+EXPORT_SYMBOL_GPL(nvmem_register);
+
+/**
+ * nvmem_unregister() - Unregister previously registered nvmem device
+ *
+ * @nvmem: Pointer to previously registered nvmem device.
+ *
+ * The return value will be an non zero on error or a zero on success.
+ */
+int nvmem_unregister(struct nvmem_device *nvmem)
+{
+	mutex_lock(&nvmem_mutex);
+	if (nvmem->users) {
+		mutex_unlock(&nvmem_mutex);
+		return -EBUSY;
+	}
+	mutex_unlock(&nvmem_mutex);
+
+	nvmem_device_remove_all_cells(nvmem);
+	device_del(&nvmem->dev);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(nvmem_unregister);
+
+static struct nvmem_device *__nvmem_device_get(struct device_node *np,
+					       struct nvmem_cell **cellp,
+					       const char *cell_id)
+{
+	struct nvmem_device *nvmem = NULL;
+
+	mutex_lock(&nvmem_mutex);
+
+	if (np) {
+		nvmem = of_nvmem_find(np);
+		if (!nvmem) {
+			mutex_unlock(&nvmem_mutex);
+			return ERR_PTR(-EPROBE_DEFER);
+		}
+	} else {
+		struct nvmem_cell *cell = nvmem_find_cell(cell_id);
+
+		if (cell) {
+			nvmem = cell->nvmem;
+			*cellp = cell;
+		}
+
+		if (!nvmem) {
+			mutex_unlock(&nvmem_mutex);
+			return ERR_PTR(-ENOENT);
+		}
+	}
+
+	nvmem->users++;
+	mutex_unlock(&nvmem_mutex);
+
+	if (!try_module_get(nvmem->owner)) {
+		dev_err(&nvmem->dev,
+			"could not increase module refcount for cell %s\n",
+			nvmem->name);
+
+		mutex_lock(&nvmem_mutex);
+		nvmem->users--;
+		mutex_unlock(&nvmem_mutex);
+
+		return ERR_PTR(-EINVAL);
+	}
+
+	return nvmem;
+}
+
+static void __nvmem_device_put(struct nvmem_device *nvmem)
+{
+	module_put(nvmem->owner);
+	mutex_lock(&nvmem_mutex);
+	nvmem->users--;
+	mutex_unlock(&nvmem_mutex);
+}
+
+static int nvmem_match(struct device *dev, const void *data)
+{
+	return !strcmp(dev_name(dev), data);
+}
+
+static struct nvmem_device *nvmem_find(const char *name)
+{
+	struct device *d;
+
+	d = class_find_device(&nvmem_class, NULL, name, nvmem_match);
+
+	return d ? to_nvmem_device(d) : NULL;
+}
+
+/**
+ * of_nvmem_device_get() - Get nvmem device from a given id
+ *
+ * @dev node: Device tree node that uses the nvmem device
+ * @id: nvmem name from nvmem-names property.
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer
+ * to a struct nvmem_device.
+ */
+struct nvmem_device *of_nvmem_device_get(struct device_node *np, const char *id)
+{
+
+	struct device_node *nvmem_np;
+	int index;
+
+	index = of_property_match_string(np, "nvmem-names", id);
+
+	nvmem_np = of_parse_phandle(np, "nvmem", index);
+	if (!nvmem_np)
+		return ERR_PTR(-EINVAL);
+
+	return __nvmem_device_get(nvmem_np, NULL, NULL);
+
+}
+EXPORT_SYMBOL_GPL(of_nvmem_device_get);
+
+
+/**
+ * nvmem_device_get() - Get nvmem device from a given id
+ *
+ * @dev : Device that uses the nvmem device
+ * @id: nvmem name from nvmem-names property.
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer
+ * to a struct nvmem_device.
+ */
+struct nvmem_device *nvmem_device_get(struct device *dev, const char *dev_name)
+{
+	if (dev->of_node) { /* try dt first */
+		struct nvmem_device *nvmem;
+
+		nvmem = of_nvmem_device_get(dev->of_node, dev_name);
+
+		if (!IS_ERR(nvmem) || PTR_ERR(nvmem) == -EPROBE_DEFER)
+			return nvmem;
+
+	}
+
+	return nvmem_find(dev_name);
+
+}
+EXPORT_SYMBOL_GPL(nvmem_device_get);
+
+static int devm_nvmem_device_match(struct device *dev, void *res, void *data)
+{
+	struct nvmem_device **nvmem = res;
+	if (!nvmem || !*nvmem) {
+		WARN_ON(!nvmem || !*nvmem);
+		return 0;
+	}
+	return *nvmem == data;
+}
+
+static void devm_nvmem_device_release(struct device *dev, void *res)
+{
+	nvmem_device_put(*(struct nvmem_device **)res);
+}
+
+/**
+ * devm_nvmem_device_put() - put alredy got nvmem device
+ *
+ * @nvmem: pointer to nvmem device allocated by devm_nvmem_cell_get(),
+ * that needs to be released.
+ */
+void devm_nvmem_device_put(struct device *dev, struct nvmem_device *nvmem)
+{
+	int ret;
+
+	ret = devres_release(dev, devm_nvmem_device_release,
+			     devm_nvmem_device_match, nvmem);
+
+	WARN_ON(ret);
+
+}
+EXPORT_SYMBOL_GPL(devm_nvmem_device_put);
+
+/**
+ * nvmem_device_put() - put alredy got nvmem device
+ *
+ * @nvmem: pointer to nvmem device that needs to be released.
+ */
+void nvmem_device_put(struct nvmem_device *nvmem)
+{
+	__nvmem_device_put(nvmem);
+}
+EXPORT_SYMBOL_GPL(nvmem_device_put);
+
+/**
+ * devm_nvmem_device_get() - Get nvmem cell of device form a given id
+ *
+ * @dev node: Device tree node that uses the nvmem cell
+ * @id: nvmem name in nvmems property.
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer
+ * to a struct nvmem_cell.  The nvmem_cell will be freed by the
+ * automatically once the device is freed.
+ */
+struct nvmem_device *devm_nvmem_device_get(struct device *dev, const char *id)
+{
+	struct nvmem_device **ptr, *nvmem;
+
+	ptr = devres_alloc(devm_nvmem_device_release, sizeof(*ptr), GFP_KERNEL);
+	if (!ptr)
+		return ERR_PTR(-ENOMEM);
+
+	nvmem = nvmem_device_get(dev, id);
+	if (!IS_ERR(nvmem)) {
+		*ptr = nvmem;
+		devres_add(dev, ptr);
+	} else {
+		devres_free(ptr);
+	}
+
+	return nvmem;
+}
+EXPORT_SYMBOL_GPL(devm_nvmem_device_get);
+
+static struct nvmem_cell *nvmem_cell_get_from_list(const char *cell_id)
+{
+	struct nvmem_cell *cell = NULL;
+	struct nvmem_device *nvmem;
+
+	nvmem = __nvmem_device_get(NULL, &cell, cell_id);
+	if (IS_ERR(nvmem))
+		return ERR_CAST(nvmem);
+
+
+	return cell;
+
+}
+/**
+ * of_nvmem_cell_get() - Get a nvmem cell from given device node and cell id
+ *
+ * @dev node: Device tree node that uses the nvmem cell
+ * @id: nvmem cell name from nvmem-cell-names property.
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer
+ * to a struct nvmem_cell.  The nvmem_cell will be freed by the
+ * nvmem_cell_put().
+ */
+struct nvmem_cell *of_nvmem_cell_get(struct device_node *np,
+					    const char *name)
+{
+	struct device_node *cell_np, *nvmem_np;
+	struct nvmem_cell *cell;
+	struct nvmem_device *nvmem;
+	const __be32 *addr;
+	int rval, len, index;
+
+	index = of_property_match_string(np, "nvmem-cell-names", name);
+
+	cell_np = of_parse_phandle(np, "nvmem-cell", index);
+	if (!cell_np)
+		return ERR_PTR(-EINVAL);
+
+	nvmem_np = of_get_parent(cell_np);
+	if (!nvmem_np)
+		return ERR_PTR(-EINVAL);
+
+	nvmem = __nvmem_device_get(nvmem_np, NULL, NULL);
+	if (IS_ERR(nvmem))
+		return ERR_CAST(nvmem);
+
+	addr = of_get_property(cell_np, "reg", &len);
+	if (!addr || (len < 2 * sizeof(int))) {
+		dev_err(&nvmem->dev, "nvmem: invalid reg on %s\n",
+			cell_np->full_name);
+		rval  = -EINVAL;
+		goto err_mem;
+	}
+
+	cell = kzalloc(sizeof(*cell), GFP_KERNEL);
+	if (!cell) {
+		rval = -ENOMEM;
+		goto err_mem;
+	}
+
+	cell->nvmem = nvmem;
+	cell->offset = be32_to_cpup(addr++);
+	cell->bytes = be32_to_cpup(addr);
+	cell->name = cell_np->name;
+
+	of_property_read_u32(cell_np, "bit-offset", &cell->bit_offset);
+	of_property_read_u32(cell_np, "nbits", &cell->nbits);
+
+	if (cell->nbits)
+		cell->bytes = DIV_ROUND_UP(cell->nbits + cell->bit_offset,
+					   BITS_PER_BYTE);
+
+	if (!IS_ALIGNED(cell->offset, nvmem->stride)) {
+			dev_err(&nvmem->dev,
+				"cell %s unaligned to nvmem stride %d\n",
+				cell->name, nvmem->stride);
+		rval  = -EINVAL;
+		goto err_sanity;
+	}
+
+	nvmem_cell_add(cell);
+
+	return cell;
+
+err_sanity:
+	kfree(cell);
+
+err_mem:
+	__nvmem_device_put(nvmem);
+
+	return ERR_PTR(rval);
+
+}
+EXPORT_SYMBOL_GPL(of_nvmem_cell_get);
+
+/**
+ * nvmem_cell_get() - Get nvmem cell of device form a given cell name
+ *
+ * @dev node: Device tree node that uses the nvmem cell
+ * @id: nvmem cell name to get.
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer
+ * to a struct nvmem_cell.  The nvmem_cell will be freed by the
+ * nvmem_cell_put().
+ */
+struct nvmem_cell *nvmem_cell_get(struct device *dev, const char *cell_id)
+{
+	struct nvmem_cell *cell;
+
+	if (dev->of_node) { /* try dt first */
+		cell = of_nvmem_cell_get(dev->of_node, cell_id);
+		if (!IS_ERR(cell) || PTR_ERR(cell) == -EPROBE_DEFER)
+			return cell;
+	}
+
+	return nvmem_cell_get_from_list(cell_id);
+
+}
+EXPORT_SYMBOL_GPL(nvmem_cell_get);
+
+static void devm_nvmem_cell_release(struct device *dev, void *res)
+{
+	nvmem_cell_put(*(struct nvmem_cell **)res);
+}
+
+/**
+ * devm_nvmem_cell_get() - Get nvmem cell of device form a given id
+ *
+ * @dev node: Device tree node that uses the nvmem cell
+ * @id: nvmem id in nvmem-names property.
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer
+ * to a struct nvmem_cell.  The nvmem_cell will be freed by the
+ * automatically once the device is freed.
+ */
+struct nvmem_cell *devm_nvmem_cell_get(struct device *dev, const char *id)
+{
+	struct nvmem_cell **ptr, *cell;
+
+	ptr = devres_alloc(devm_nvmem_cell_release, sizeof(*ptr), GFP_KERNEL);
+	if (!ptr)
+		return ERR_PTR(-ENOMEM);
+
+	cell = nvmem_cell_get(dev, id);
+	if (!IS_ERR(cell)) {
+		*ptr = cell;
+		devres_add(dev, ptr);
+	} else {
+		devres_free(ptr);
+	}
+
+	return cell;
+}
+EXPORT_SYMBOL_GPL(devm_nvmem_cell_get);
+
+static int devm_nvmem_cell_match(struct device *dev, void *res, void *data)
+{
+	struct nvmem_cell **c = res;
+
+	if (!c || !*c) {
+		WARN_ON(!c || !*c);
+		return 0;
+	}
+	return *c == data;
+}
+
+/**
+ * devm_nvmem_cell_put() - Release previously allocated nvmem cell
+ * from devm_nvmem_cell_get.
+ *
+ * @cell: Previously allocated nvmem cell by devm_nvmem_cell_get()
+ */
+void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell)
+{
+	int ret;
+
+	ret = devres_release(dev, devm_nvmem_cell_release, devm_nvmem_cell_match, cell);
+
+	WARN_ON(ret);
+}
+EXPORT_SYMBOL(devm_nvmem_cell_put);
+
+/**
+ * nvmem_cell_put() - Release previously allocated nvmem cell.
+ *
+ * @cell: Previously allocated nvmem cell by nvmem_cell_get()
+ */
+void nvmem_cell_put(struct nvmem_cell *cell)
+{
+	struct nvmem_device *nvmem = cell->nvmem;
+
+	__nvmem_device_put(nvmem);
+	nvmem_cell_drop(cell);
+}
+EXPORT_SYMBOL_GPL(nvmem_cell_put);
+
+static inline void nvmem_shift_read_buffer_in_place(struct nvmem_cell *cell,
+						    void *buf)
+{
+	u8 *p, *b;
+	int i, bit_offset = cell->bit_offset;
+
+	p = b = buf;
+	if (bit_offset) {
+		/* First shift */
+		*b++ >>= bit_offset;
+
+		/* setup rest of the bytes if any */
+		for (i = 1; i < cell->bytes; i++) {
+			/* Get bits from next byte and shift them towards msb */
+			*p |= *b << (BITS_PER_BYTE - bit_offset);
+
+			p = b;
+			*b++ >>= bit_offset;
+		}
+
+		/* result fits in less bytes */
+		if (cell->bytes != DIV_ROUND_UP(cell->nbits, BITS_PER_BYTE))
+			*p-- = 0;
+	}
+	/* clear msb bits if any leftover in the last byte */
+	*p &= GENMASK((cell->nbits%BITS_PER_BYTE) - 1, 0);
+}
+
+static int __nvmem_cell_read(struct nvmem_device *nvmem,
+		      struct nvmem_cell *cell,
+		      void *buf, ssize_t *len)
+{
+	int rc;
+
+	rc = regmap_raw_read(nvmem->regmap, cell->offset, buf, cell->bytes);
+
+	if (IS_ERR_VALUE(rc))
+		return rc;
+
+	/* shift bits in-place */
+	if (cell->bit_offset || cell->bit_offset)
+		nvmem_shift_read_buffer_in_place(cell, buf);
+
+	*len = cell->bytes;
+
+	return cell->bytes;
+}
+/**
+ * nvmem_cell_read() - Read a given nvmem cell
+ *
+ * @cell: nvmem cell to be read.
+ * @len: pointer to length of cell which will be populated on successful read.
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer
+ * to a char * bufffer.  The buffer should be freed by the consumer with a
+ * kfree().
+ */
+void *nvmem_cell_read(struct nvmem_cell *cell, ssize_t *len)
+{
+	struct nvmem_device *nvmem = cell->nvmem;
+	u8 *buf;
+	int rc;
+
+	if (!nvmem || !nvmem->regmap)
+		return ERR_PTR(-EINVAL);
+
+	buf = kzalloc(cell->bytes, GFP_KERNEL);
+	if (!buf)
+		return ERR_PTR(-ENOMEM);
+
+	rc = __nvmem_cell_read(nvmem, cell, buf, len);
+	if (IS_ERR_VALUE(rc)) {
+		kfree(buf);
+		return ERR_PTR(rc);
+	}
+
+	return buf;
+}
+EXPORT_SYMBOL_GPL(nvmem_cell_read);
+
+static inline void *nvmem_cell_prepare_write_buffer(struct nvmem_cell *cell,
+						    u8 *_buf, int len)
+{
+	struct nvmem_device *nvmem = cell->nvmem;
+	int i, rc, nbits, bit_offset = cell->bit_offset;
+	u8 v, *p, *buf, *b, pbyte, pbits;
+
+	nbits = cell->nbits;
+	buf = kzalloc(cell->bytes, GFP_KERNEL);
+	if (!buf)
+		return ERR_PTR(-ENOMEM);
+
+	memcpy(buf, _buf, len);
+	p = b = buf;
+
+	if (bit_offset) {
+		pbyte = *b;
+		*b <<= bit_offset;
+
+		/* setup the first byte with lsb bits from nvmem */
+		rc = regmap_raw_read(nvmem->regmap, cell->offset, &v, 1);
+		*b++ |= GENMASK(bit_offset - 1, 0) & v;
+
+		/* setup rest of the byte if any */
+		for (i = 1; i < cell->bytes; i++) {
+			/* Get last byte bits and shift them towards lsb */
+			pbits = pbyte >> (BITS_PER_BYTE - 1 - bit_offset);
+			pbyte = *b;
+			p = b;
+			*b <<= bit_offset;
+			*b++ |= pbits;
+		}
+	}
+
+	/* if it's not end on byte boundary */
+	if ((nbits + bit_offset) % BITS_PER_BYTE) {
+		/* setup the last byte with msb bits from nvmem */
+		rc = regmap_raw_read(nvmem->regmap,
+				    cell->offset + cell->bytes - 1, &v, 1);
+		*p |= GENMASK(7, (nbits + bit_offset) % BITS_PER_BYTE) & v;
+
+	}
+
+	return buf;
+}
+
+/**
+ * nvmem_cell_write() - Write to a given nvmem cell
+ *
+ * @cell: nvmem cell to be written.
+ * @buf: Buffer to be written.
+ * @len: length of buffer to be written to nvmem cell.
+ *
+ * The return value will be an length of bytes written or non zero on failure.
+ */
+int nvmem_cell_write(struct nvmem_cell *cell, void *buf, ssize_t len)
+{
+	struct nvmem_device *nvmem = cell->nvmem;
+	int rc;
+	void *wbuf = buf;
+
+	if (!nvmem || !nvmem->regmap || nvmem->read_only ||
+	    (cell->bit_offset == 0 && len != cell->bytes))
+		return -EINVAL;
+
+	if (cell->bit_offset || cell->nbits) {
+		wbuf = nvmem_cell_prepare_write_buffer(cell, buf, len);
+		if (IS_ERR(wbuf))
+			return PTR_ERR(wbuf);
+	}
+
+	rc = regmap_raw_write(nvmem->regmap, cell->offset, wbuf, cell->bytes);
+
+	/* free the tmp buffer */
+	if (cell->bit_offset)
+		kfree(wbuf);
+
+	if (IS_ERR_VALUE(rc))
+		return rc;
+
+	return len;
+}
+EXPORT_SYMBOL_GPL(nvmem_cell_write);
+
+/**
+ * nvmem_device_cell_read() - Read a given nvmem device and cell
+ *
+ * @nvmem: nvmem device to read from.
+ * @info: nvmem cell info to be read.
+ * @buf: buffer pointer which will be populated on successful read.
+ *
+ * The return value would be length of successful bytes read on success
+ * and error code in error cases.
+ */
+int nvmem_device_cell_read(struct nvmem_device *nvmem,
+			   struct nvmem_cell_info *info, void *buf)
+{
+	struct nvmem_cell cell;
+	int rc, len;
+
+	if (!nvmem || !nvmem->regmap)
+		return -EINVAL;
+
+	rc = nvmem_cell_info_to_nvmem_cell(nvmem, info, &cell);
+	if (IS_ERR_VALUE(rc))
+		return rc;
+
+	rc = __nvmem_cell_read(nvmem, &cell, buf, &len);
+	if (IS_ERR_VALUE(rc))
+		return rc;
+
+	return len;
+}
+EXPORT_SYMBOL_GPL(nvmem_device_cell_read);
+
+/**
+ * nvmem_device_cell_write() - Write cell to a given nvmem device
+ *
+ * @nvmem: nvmem device to be written to.
+ * @info: nvmem cell info to be written
+ * @buf: buffer to be written to cell.
+ *
+ * The return value will be an length of bytes written or non zero on failure.
+ * */
+int nvmem_device_cell_write(struct nvmem_device *nvmem,
+			    struct nvmem_cell_info *info, void *buf)
+{
+	struct nvmem_cell cell;
+	int rc;
+
+	if (!nvmem || !nvmem->regmap)
+		return -EINVAL;
+
+	rc = nvmem_cell_info_to_nvmem_cell(nvmem, info, &cell);
+	if (IS_ERR_VALUE(rc))
+		return rc;
+
+	return nvmem_cell_write(&cell, buf, cell.bytes);
+}
+EXPORT_SYMBOL_GPL(nvmem_device_cell_write);
+
+/**
+ * nvmem_device_read() - Read from a given nvmem device
+ *
+ * @nvmem: nvmem device to read from.
+ * @offset: offset in nvmem device.
+ * @bytes: number of bytes to read.
+ * @buf: buffer pointer which will be populated on successful read.
+ *
+ * The return value would be length of successful bytes read on success
+ * and error code in error cases.
+ */
+int nvmem_device_read(struct nvmem_device *nvmem,
+		      unsigned int offset,
+		      size_t bytes, void *buf)
+{
+	int rc;
+
+	if (!nvmem || !nvmem->regmap)
+		return -EINVAL;
+
+	rc = regmap_raw_read(nvmem->regmap, offset, buf, bytes);
+
+	if (IS_ERR_VALUE(rc))
+		return rc;
+
+	return bytes;
+}
+EXPORT_SYMBOL_GPL(nvmem_device_read);
+
+/**
+ * nvmem_device_write() - Write cell to a given nvmem device
+ *
+ * @nvmem: nvmem device to be written to.
+ * @offset: offset in nvmem device.
+ * @bytes: number of bytes to write.
+ * @buf: buffer to be written.
+ *
+ * The return value will be an length of bytes written or non zero on failure.
+ * */
+int nvmem_device_write(struct nvmem_device *nvmem,
+		       unsigned int offset,
+		       size_t bytes, void *buf)
+{
+	int rc;
+
+	if (!nvmem || !nvmem->regmap)
+		return -EINVAL;
+
+	rc = regmap_raw_write(nvmem->regmap, offset, buf, bytes);
+
+	if (IS_ERR_VALUE(rc))
+		return rc;
+
+
+	return bytes;
+}
+EXPORT_SYMBOL_GPL(nvmem_device_write);
+
+static int __init nvmem_init(void)
+{
+	return class_register(&nvmem_class);
+}
+
+static void __exit nvmem_exit(void)
+{
+	class_unregister(&nvmem_class);
+}
+
+subsys_initcall(nvmem_init);
+module_exit(nvmem_exit);
+
+MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
+MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com");
+MODULE_DESCRIPTION("nvmem Driver Core");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/nvmem/qfprom.c b/drivers/nvmem/qfprom.c
new file mode 100644
index 000000000000..7f7a82fc0951
--- /dev/null
+++ b/drivers/nvmem/qfprom.c
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/nvmem-provider.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/of.h>
+
+static struct regmap_config qfprom_regmap_config = {
+	.reg_bits = 32,
+	.val_bits = 8,
+	.reg_stride = 1,
+};
+
+static struct nvmem_config econfig = {
+	.name = "qfprom",
+	.owner = THIS_MODULE,
+};
+
+static int qfprom_remove(struct platform_device *pdev)
+{
+	struct nvmem_device *nvmem = platform_get_drvdata(pdev);
+
+	return nvmem_unregister(nvmem);
+}
+
+static int qfprom_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	struct nvmem_device *nvmem;
+	struct regmap *regmap;
+	void __iomem *base;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	qfprom_regmap_config.max_register = resource_size(res) - 1;
+
+	regmap = devm_regmap_init_mmio(dev, base, &qfprom_regmap_config);
+	if (IS_ERR(regmap)) {
+		dev_err(dev, "regmap init failed\n");
+		return PTR_ERR(regmap);
+	}
+	econfig.dev = dev;
+	nvmem = nvmem_register(&econfig);
+	if (IS_ERR(nvmem))
+		return PTR_ERR(nvmem);
+
+	platform_set_drvdata(pdev, nvmem);
+
+	return 0;
+}
+
+static const struct of_device_id qfprom_of_match[] = {
+	{ .compatible = "qcom,qfprom",},
+	{/* sentinel */},
+};
+MODULE_DEVICE_TABLE(of, qfprom_of_match);
+
+static struct platform_driver qfprom_driver = {
+	.probe = qfprom_probe,
+	.remove = qfprom_remove,
+	.driver = {
+		.name = "qcom,qfprom",
+		.of_match_table = qfprom_of_match,
+	},
+};
+module_platform_driver(qfprom_driver);
+MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org>");
+MODULE_DESCRIPTION("Qualcomm QFPROM driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/nvmem/sunxi-sid.c b/drivers/nvmem/sunxi-sid.c
new file mode 100644
index 000000000000..4b39716516df
--- /dev/null
+++ b/drivers/nvmem/sunxi-sid.c
@@ -0,0 +1,160 @@
+/*
+ * Allwinner sunXi SoCs Security ID support.
+ *
+ * Copyright (c) 2013 Oliver Schinagl <oliver@schinagl.nl>
+ * Copyright (C) 2014 Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * 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.
+ *
+ */
+
+
+#include <linux/platform_device.h>
+#include <linux/nvmem-provider.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/of.h>
+
+
+static struct nvmem_config econfig = {
+	.name = "sunxi-sid",
+	.read_only = true,
+	.owner = THIS_MODULE,
+};
+
+struct sunxi_sid {
+	void __iomem		*base;
+};
+
+/* We read the entire key, due to a 32 bit read alignment requirement. Since we
+ * want to return the requested byte, this results in somewhat slower code and
+ * uses 4 times more reads as needed but keeps code simpler. Since the SID is
+ * only very rarely probed, this is not really an issue.
+ */
+static u8 sunxi_sid_read_byte(const struct sunxi_sid *sid,
+			      const unsigned int offset)
+{
+	u32 sid_key;
+
+	sid_key = ioread32be(sid->base + round_down(offset, 4));
+	sid_key >>= (offset % 4) * 8;
+
+	return sid_key; /* Only return the last byte */
+}
+
+static int sunxi_sid_read(void *context,
+			    const void *reg, size_t reg_size,
+			    void *val, size_t val_size)
+{
+	struct sunxi_sid *sid = context;
+	unsigned int offset = *(u32 *)reg;
+	u8 *buf = val;
+
+	while (val_size) {
+		*buf++ = sunxi_sid_read_byte(sid, offset);
+		val_size--;
+		offset++;
+	}
+
+	return 0;
+}
+
+static int sunxi_sid_write(void *context, const void *data, size_t count)
+{
+	/* Unimplemented */
+	return 0;
+}
+
+static struct regmap_bus sunxi_sid_bus = {
+	.read = sunxi_sid_read,
+	.write = sunxi_sid_write,
+	.reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
+	.val_format_endian_default = REGMAP_ENDIAN_NATIVE,
+};
+
+static bool sunxi_sid_writeable_reg(struct device *dev, unsigned int reg)
+{
+	return false;
+}
+
+static struct regmap_config sunxi_sid_regmap_config = {
+	.reg_bits = 32,
+	.val_bits = 8,
+	.reg_stride = 1,
+	.writeable_reg = sunxi_sid_writeable_reg,
+};
+
+static int sunxi_sid_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	struct nvmem_device *nvmem;
+	struct regmap *regmap;
+	struct sunxi_sid *sid;
+
+	sid = devm_kzalloc(dev, sizeof(*sid), GFP_KERNEL);
+	if (!sid)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	sid->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(sid->base))
+		return PTR_ERR(sid->base);
+
+	sunxi_sid_regmap_config.max_register = resource_size(res) - 1;
+
+	regmap = devm_regmap_init(dev, &sunxi_sid_bus, sid,
+				  &sunxi_sid_regmap_config);
+	if (IS_ERR(regmap)) {
+		dev_err(dev, "regmap init failed\n");
+		return PTR_ERR(regmap);
+	}
+	econfig.dev = dev;
+	nvmem = nvmem_register(&econfig);
+	if (IS_ERR(nvmem))
+		return PTR_ERR(nvmem);
+
+	platform_set_drvdata(pdev, nvmem);
+
+	return 0;
+}
+
+static int sunxi_sid_remove(struct platform_device *pdev)
+{
+	struct nvmem_device *nvmem = platform_get_drvdata(pdev);
+
+	return nvmem_unregister(nvmem);
+}
+
+static const struct of_device_id sunxi_sid_of_match[] = {
+	{ .compatible = "allwinner,sun4i-a10-sid" },
+	{ .compatible = "allwinner,sun7i-a20-sid" },
+	{/* sentinel */},
+};
+MODULE_DEVICE_TABLE(of, sunxi_sid_of_match);
+
+static struct platform_driver sunxi_sid_driver = {
+	.probe = sunxi_sid_probe,
+	.remove = sunxi_sid_remove,
+	.driver = {
+		.name = "eeprom-sunxi-sid",
+		.of_match_table = sunxi_sid_of_match,
+	},
+};
+module_platform_driver(sunxi_sid_driver);
+
+MODULE_AUTHOR("Oliver Schinagl <oliver@schinagl.nl>");
+MODULE_DESCRIPTION("Allwinner sunxi security id driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h
new file mode 100644
index 000000000000..7e1631439939
--- /dev/null
+++ b/include/linux/nvmem-consumer.h
@@ -0,0 +1,152 @@
+/*
+ * nvmem framework consumer.
+ *
+ * Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+ * Copyright (C) 2013 Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef _LINUX_NVMEM_CONSUMER_H
+#define _LINUX_NVMEM_CONSUMER_H
+
+struct device;
+/* consumer cookie */
+struct nvmem_cell;
+struct nvmem_device;
+
+struct nvmem_cell_info {
+	const char		*name;
+	int			offset;
+	int			bytes;
+	int			bit_offset;
+	int			nbits;
+};
+
+#if IS_ENABLED(CONFIG_NVMEM)
+
+/* Cell based interface */
+struct nvmem_cell *nvmem_cell_get(struct device *dev, const char *name);
+struct nvmem_cell *devm_nvmem_cell_get(struct device *dev, const char *name);
+struct nvmem_cell *of_nvmem_cell_get(struct device_node *np,
+				     const char *name);
+void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell);
+void *nvmem_cell_read(struct nvmem_cell *cell, ssize_t *len);
+int nvmem_cell_write(struct nvmem_cell *cell, void *buf, ssize_t len);
+
+/* direct nvmem device read/write interface */
+struct nvmem_device *nvmem_device_get(struct device *dev, const char *name);
+struct nvmem_device *devm_nvmem_device_get(struct device *dev,
+					   const char *name);
+struct nvmem_device *of_nvmem_device_get(struct device_node *np,
+					 const char *name);
+void nvmem_cell_put(struct nvmem_cell *cell);
+void nvmem_device_put(struct nvmem_device *nvmem);
+void devm_nvmem_device_put(struct device *dev, struct nvmem_device *nvmem);
+int nvmem_device_read(struct nvmem_device *nvmem, unsigned int offset,
+		      size_t bytes, void *buf);
+int nvmem_device_write(struct nvmem_device *nvmem, unsigned int offset,
+		       size_t bytes, void *buf);
+int nvmem_device_cell_read(struct nvmem_device *nvmem,
+			   struct nvmem_cell_info *info, void *buf);
+int nvmem_device_cell_write(struct nvmem_device *nvmem,
+			    struct nvmem_cell_info *info, void *buf);
+
+#else
+
+static inline struct nvmem_cell *nvmem_cell_get(struct device *dev,
+						const char *name)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+static inline struct nvmem_cell *devm_nvmem_cell_get(struct device *dev,
+				       const char *name)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+static inline void devm_nvmem_cell_put(struct device *dev,
+				       struct nvmem_cell *cell)
+{
+
+}
+static inline void nvmem_cell_put(struct nvmem_cell *cell)
+{
+}
+
+static inline char *nvmem_cell_read(struct nvmem_cell *cell, ssize_t *len)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+static inline int nvmem_cell_write(struct nvmem_cell *cell,
+				    const char *buf, ssize_t len)
+{
+	return -ENOSYS;
+}
+
+static inline struct nvmem_device *nvmem_device_get(struct device *dev,
+						    const char *name)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+static inline struct nvmem_device *devm_nvmem_device_get(struct device *dev,
+							 const char *name)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+static inline void nvmem_device_put(struct nvmem_device *nvmem)
+{
+}
+
+static inline void devm_nvmem_device_put(struct device *dev,
+					 struct nvmem_device *nvmem)
+{
+}
+
+static inline int nvmem_device_cell_read(struct nvmem_device *nvmem,
+					 struct nvmem_cell_info *info,
+					 void *buf)
+{
+	return -ENOSYS;
+}
+
+static inline int nvmem_device_cell_write(struct nvmem_device *nvmem,
+					  struct nvmem_cell_info *info,
+					  void *buf)
+{
+	return -ENOSYS;
+}
+
+static inline int nvmem_device_read(struct nvmem_device *nvmem,
+				    unsigned int offset, size_t bytes, void *buf)
+{
+	return -ENOSYS;
+}
+
+static inline int nvmem_device_write(struct nvmem_device *nvmem,
+				     unsigned int offset, size_t bytes, void *buf)
+{
+	return -ENOSYS;
+}
+
+static inline struct nvmem_cell *of_nvmem_cell_get(struct device_node *np,
+				     const char *name)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+static inline struct nvmem_device *of_nvmem_device_get(struct device_node *np,
+						       const char *name)
+{
+	return ERR_PTR(-ENOSYS);
+}
+#endif /* CONFIG_NVMEM */
+
+
+#endif  /* ifndef _LINUX_NVMEM_CONSUMER_H */
diff --git a/include/linux/nvmem-provider.h b/include/linux/nvmem-provider.h
new file mode 100644
index 000000000000..74eed425f884
--- /dev/null
+++ b/include/linux/nvmem-provider.h
@@ -0,0 +1,48 @@
+/*
+ * nvmem framework provider.
+ *
+ * Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+ * Copyright (C) 2013 Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef _LINUX_NVMEM_PROVIDER_H
+#define _LINUX_NVMEM_PROVIDER_H
+
+#include <linux/nvmem-consumer.h>
+
+struct nvmem_device;
+
+struct nvmem_config {
+	struct device		*dev;
+	const char		*name;
+	int			id;
+	struct module		*owner;
+	struct nvmem_cell_info	*cells;
+	int			ncells;
+	bool			read_only;
+};
+
+#if IS_ENABLED(CONFIG_NVMEM)
+
+struct nvmem_device *nvmem_register(struct nvmem_config *cfg);
+int nvmem_unregister(struct nvmem_device *nvmem);
+
+#else
+
+static inline struct nvmem_device *nvmem_register(struct nvmem_config *cfg)
+{
+	return ERR_PTR(-ENOSYS);
+}
+
+static inline int nvmem_unregister(struct nvmem_device *nvmem)
+{
+	return -ENOSYS;
+}
+
+#endif /* CONFIG_NVMEM */
+
+#endif  /* ifndef _LINUX_NVMEM_PROVIDER_H */
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 116655d92269..59c55ea0f0b5 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -433,6 +433,8 @@ int regmap_update_bits_check_async(struct regmap *map, unsigned int reg,
 				   unsigned int mask, unsigned int val,
 				   bool *change);
 int regmap_get_val_bytes(struct regmap *map);
+int regmap_get_max_register(struct regmap *map);
+int regmap_get_reg_stride(struct regmap *map);
 int regmap_async_complete(struct regmap *map);
 bool regmap_can_raw_write(struct regmap *map);
 
@@ -676,6 +678,18 @@ static inline int regmap_get_val_bytes(struct regmap *map)
 	return -EINVAL;
 }
 
+static inline int regmap_get_max_register(struct regmap *map)
+{
+	WARN_ONCE(1, "regmap API is disabled");
+	return -EINVAL;
+}
+
+static inline int regmap_get_reg_stride(struct regmap *map)
+{
+	WARN_ONCE(1, "regmap API is disabled");
+	return -EINVAL;
+}
+
 static inline int regcache_sync(struct regmap *map)
 {
 	WARN_ONCE(1, "regmap API is disabled");