diff --git a/MAINTAINERS b/MAINTAINERS
index f7d568b..04f0be6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2864,6 +2864,14 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/cpufreq/brcm,stb-avs-cpu-freq.txt
 F:	drivers/cpufreq/brcmstb*
 
+BROADCOM STB SOC DPFE DRIVER
+M:	Markus Mayer <mmayer@broadcom.com>
+M:	bcm-kernel-feedback-list@broadcom.com
+L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S:	Maintained
+F:	Documentation/devicetree/bindings/soc/bcm/brcm,dpfe-cpu.txt
+F:	drivers/misc/brcmstb-dpfe.c
+
 BROADCOM SPECIFIC AMBA DRIVER (BCMA)
 M:	Rafał Miłecki <zajec5@gmail.com>
 L:	linux-wireless@vger.kernel.org
diff --git a/drivers/soc/bcm/brcmstb/Makefile b/drivers/soc/bcm/brcmstb/Makefile
index 9120b27..3ec87fe 100644
--- a/drivers/soc/bcm/brcmstb/Makefile
+++ b/drivers/soc/bcm/brcmstb/Makefile
@@ -1 +1 @@
-obj-y				+= common.o biuctrl.o
+obj-y				+= common.o biuctrl.o dpfe.o
diff --git a/drivers/soc/bcm/brcmstb/dpfe.c b/drivers/soc/bcm/brcmstb/dpfe.c
new file mode 100644
index 0000000..c2504ca
--- /dev/null
+++ b/drivers/soc/bcm/brcmstb/dpfe.c
@@ -0,0 +1,689 @@
+/*
+ * DDR PHY Front End (DPFE) driver for Broadcom set top box SoCs
+ *
+ * Copyright (c) 2017 Broadcom
+ *
+ * Released under the GPLv2 only.
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+/*
+ * This driver provides access to the DPFE interface of Broadcom STB SoCs.
+ * The firmware running on the DCPU inside the DDR PHY can provide current
+ * information about the system's RAM, for instance the DRAM refresh rate.
+ * This can be used as an indirect indicator for the DRAM's temperature.
+ * Slower refresh rate means cooler RAM, higher refresh rate means hotter
+ * RAM.
+ *
+ * Throughout the driver, we use readl_relaxed() and writel_relaxed(), which
+ * already contain the appropriate le32_to_cpu()/cpu_to_le32() calls.
+ */
+
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+
+#define DRVNAME			"brcmstb-dpfe"
+#define FIRMWARE_NAME		"dpfe.bin"
+
+/* DCPU register offsets */
+#define REG_DCPU_RESET		0x0
+#define REG_TO_DCPU_MBOX	0x10
+#define REG_TO_HOST_MBOX	0x14
+
+/* Message RAM */
+#define DCPU_MSG_RAM(x)		(0x100 + (x) * sizeof(u32))
+
+/* DRAM Info Offsets & Masks */
+#define DRAM_INFO_INTERVAL	0x0
+#define DRAM_INFO_MR4		0x4
+#define DRAM_INFO_ERROR		0x8
+#define DRAM_INFO_MR4_MASK	0xff
+
+/* DRAM MR4 Offsets & Masks */
+#define DRAM_MR4_REFRESH	0x0	/* Refresh rate */
+#define DRAM_MR4_SR_ABORT	0x3	/* Self Refresh Abort */
+#define DRAM_MR4_PPRE		0x4	/* Post-package repair entry/exit */
+#define DRAM_MR4_TH_OFFS	0x5	/* Thermal Offset; vendor specific */
+#define DRAM_MR4_TUF		0x7	/* Temperature Update Flag */
+
+#define DRAM_MR4_REFRESH_MASK	0x7
+#define DRAM_MR4_SR_ABORT_MASK	0x1
+#define DRAM_MR4_PPRE_MASK	0x1
+#define DRAM_MR4_TH_OFFS_MASK	0x3
+#define DRAM_MR4_TUF_MASK	0x1
+
+/* DRAM Vendor Offsets & Masks */
+#define DRAM_VENDOR_MR5		0x0
+#define DRAM_VENDOR_MR6		0x4
+#define DRAM_VENDOR_MR7		0x8
+#define DRAM_VENDOR_MR8		0xc
+#define DRAM_VENDOR_ERROR	0x10
+#define DRAM_VENDOR_MASK	0xff
+
+/* Reset register bits & masks */
+#define DCPU_RESET_SHIFT	0x0
+#define DCPU_RESET_MASK		0x1
+#define DCPU_CLK_DISABLE_SHIFT	0x2
+
+/* DCPU return codes */
+#define DCPU_RET_ERROR_BIT	BIT(31)
+#define DCPU_RET_SUCCESS	0x1
+#define DCPU_RET_ERR_HEADER	(DCPU_RET_ERROR_BIT | BIT(0))
+#define DCPU_RET_ERR_INVAL	(DCPU_RET_ERROR_BIT | BIT(1))
+#define DCPU_RET_ERR_CHKSUM	(DCPU_RET_ERROR_BIT | BIT(2))
+#define DCPU_RET_ERR_COMMAND	(DCPU_RET_ERROR_BIT | BIT(3))
+/* This error code is not firmware defined and only used in the driver. */
+#define DCPU_RET_ERR_TIMEDOUT	(DCPU_RET_ERROR_BIT | BIT(4))
+
+/* Firmware magic */
+#define DPFE_BE_MAGIC		0xfe1010fe
+#define DPFE_LE_MAGIC		0xfe0101fe
+
+/* Error codes */
+#define ERR_INVALID_MAGIC	-1
+#define ERR_INVALID_SIZE	-2
+#define ERR_INVALID_CHKSUM	-3
+
+/* Message types */
+#define DPFE_MSG_TYPE_COMMAND	1
+#define DPFE_MSG_TYPE_RESPONSE	2
+
+#define DELAY_LOOP_MAX		200000
+
+enum dpfe_msg_fields {
+	MSG_HEADER,
+	MSG_COMMAND,
+	MSG_ARG_COUNT,
+	MSG_ARG0,
+	MSG_CHKSUM,
+	MSG_FIELD_MAX /* Last entry */
+};
+
+enum dpfe_commands {
+	DPFE_CMD_GET_INFO,
+	DPFE_CMD_GET_REFRESH,
+	DPFE_CMD_GET_VENDOR,
+	DPFE_CMD_MAX /* Last entry */
+};
+
+struct dpfe_msg {
+	u32 header;
+	u32 command;
+	u32 arg_count;
+	u32 arg0;
+	u32 chksum; /* This is the sum of all other entries. */
+};
+
+/*
+ * Format of the binary firmware file:
+ *
+ *   entry
+ *      0    header
+ *              value:  0xfe0101fe  <== little endian
+ *                      0xfe1010fe  <== big endian
+ *      1    sequence:
+ *              [31:16] total segments on this build
+ *              [15:0]  this segment sequence.
+ *      2    FW version
+ *      3    IMEM byte size
+ *      4    DMEM byte size
+ *           IMEM
+ *           DMEM
+ *      last checksum ==> sum of everything
+ */
+struct dpfe_firmware_header {
+	u32 magic;
+	u32 sequence;
+	u32 version;
+	u32 imem_size;
+	u32 dmem_size;
+};
+
+/* Things we only need during initialization. */
+struct init_data {
+	unsigned int dmem_len;
+	unsigned int imem_len;
+	unsigned int chksum;
+	bool is_big_endian;
+};
+
+/* Things we need for as long as we are active. */
+struct private_data {
+	void __iomem *regs;
+	void __iomem *dmem;
+	void __iomem *imem;
+	struct device *dev;
+	unsigned int index;
+	struct mutex lock;
+};
+
+static const char *error_text[] = {
+	"Success", "Header code incorrect", "Unknown command or argument",
+	"Incorrect checksum", "Malformed command", "Timed out",
+};
+
+/* List of supported firmware commands */
+static const u32 dpfe_commands[DPFE_CMD_MAX][MSG_FIELD_MAX] = {
+	[DPFE_CMD_GET_INFO] = {
+		[MSG_HEADER] = DPFE_MSG_TYPE_COMMAND,
+		[MSG_COMMAND] = 1,
+		[MSG_ARG_COUNT] = 1,
+		[MSG_ARG0] = 1,
+		[MSG_CHKSUM] = 4,
+	},
+	[DPFE_CMD_GET_REFRESH] = {
+		[MSG_HEADER] = DPFE_MSG_TYPE_COMMAND,
+		[MSG_COMMAND] = 2,
+		[MSG_ARG_COUNT] = 1,
+		[MSG_ARG0] = 1,
+		[MSG_CHKSUM] = 5,
+	},
+	[DPFE_CMD_GET_VENDOR] = {
+		[MSG_HEADER] = DPFE_MSG_TYPE_COMMAND,
+		[MSG_COMMAND] = 2,
+		[MSG_ARG_COUNT] = 1,
+		[MSG_ARG0] = 2,
+		[MSG_CHKSUM] = 6,
+	},
+};
+
+static void __disable_dcpu(void __iomem *regs)
+{
+	u32 val;
+
+	/* Check if DCPU is running */
+	val = readl_relaxed(regs + REG_DCPU_RESET);
+	if (!(val & DCPU_RESET_MASK)) {
+		/* Put DCPU in reset */
+		val |= (1 << DCPU_RESET_SHIFT);
+		writel_relaxed(val, regs + REG_DCPU_RESET);
+	}
+}
+
+static void __enable_dcpu(void __iomem *regs)
+{
+	u32 val;
+
+	/* Clear mailbox registers. */
+	writel_relaxed(0, regs + REG_TO_DCPU_MBOX);
+	writel_relaxed(0, regs + REG_TO_HOST_MBOX);
+
+	/* Disable DCPU clock gating */
+	val = readl_relaxed(regs + REG_DCPU_RESET);
+	val &= ~(1 << DCPU_CLK_DISABLE_SHIFT);
+	writel_relaxed(val, regs + REG_DCPU_RESET);
+
+	/* Take DCPU out of reset */
+	val = readl_relaxed(regs + REG_DCPU_RESET);
+	val &= ~(1 << DCPU_RESET_SHIFT);
+	writel_relaxed(val, regs + REG_DCPU_RESET);
+}
+
+static unsigned int get_msg_chksum(const u32 msg[])
+{
+	unsigned int sum = 0;
+	unsigned int i;
+
+	/* Don't include the last field in the checksum. */
+	for (i = 0; i < MSG_FIELD_MAX - 1; i++)
+		sum += msg[i];
+
+	return sum;
+}
+
+static int __send_command(struct private_data *priv, unsigned int cmd,
+			  u32 result[])
+{
+	const u32 *msg = dpfe_commands[cmd];
+	void __iomem *regs = priv->regs;
+	unsigned int i, chksum;
+	int ret = 0;
+	u32 resp;
+
+	if (cmd >= DPFE_CMD_MAX)
+		return -1;
+
+	mutex_lock(&priv->lock);
+
+	/* Write command and arguments to message area */
+	for (i = 0; i < MSG_FIELD_MAX; i++)
+		writel_relaxed(msg[i], regs + DCPU_MSG_RAM(i));
+
+	/* Tell DCPU there is a command waiting */
+	writel_relaxed(1, regs + REG_TO_DCPU_MBOX);
+
+	/* Wait for DCPU to process the command */
+	for (i = 0; i < DELAY_LOOP_MAX; i++) {
+		/* Read response code */
+		resp = readl_relaxed(regs + REG_TO_HOST_MBOX);
+		if (resp > 0)
+			break;
+		udelay(5);
+	}
+
+	if (i == DELAY_LOOP_MAX) {
+		resp = (DCPU_RET_ERR_TIMEDOUT & ~DCPU_RET_ERROR_BIT);
+		ret = -ffs(resp);
+	} else {
+		/* Read response data */
+		for (i = 0; i < MSG_FIELD_MAX; i++)
+			result[i] = readl_relaxed(regs + DCPU_MSG_RAM(i));
+	}
+
+	/* Tell DCPU we are done */
+	writel_relaxed(0, regs + REG_TO_HOST_MBOX);
+
+	mutex_unlock(&priv->lock);
+
+	if (ret)
+		return ret;
+
+	/* Verify response */
+	chksum = get_msg_chksum(result);
+	if (chksum != result[MSG_CHKSUM])
+		resp = DCPU_RET_ERR_CHKSUM;
+
+	if (resp != DCPU_RET_SUCCESS) {
+		resp &= ~DCPU_RET_ERROR_BIT;
+		ret = -ffs(resp);
+	}
+
+	return ret;
+}
+
+/* Ensure that the firmware file loaded meets all the requirements. */
+static int __verify_firmware(struct init_data *init,
+			     const struct firmware *fw)
+{
+	const struct dpfe_firmware_header *header = (void *)fw->data;
+	unsigned int dmem_size, imem_size, total_size;
+	bool is_big_endian = false;
+	const u32 *chksum_ptr;
+
+	if (header->magic == DPFE_BE_MAGIC)
+		is_big_endian = true;
+	else if (header->magic != DPFE_LE_MAGIC)
+		return ERR_INVALID_MAGIC;
+
+	if (is_big_endian) {
+		dmem_size = be32_to_cpu(header->dmem_size);
+		imem_size = be32_to_cpu(header->imem_size);
+	} else {
+		dmem_size = header->dmem_size;
+		imem_size = header->imem_size;
+	}
+
+	/* Data and instruction sections are 32 bit words. */
+	if ((dmem_size % sizeof(u32)) != 0 || (imem_size % sizeof(u32)) != 0)
+		return ERR_INVALID_SIZE;
+
+	/*
+	 * The header + the data section + the instruction section + the
+	 * checksum must be equal to the total firmware size.
+	 */
+	total_size = dmem_size + imem_size + sizeof(*header) +
+		sizeof(*chksum_ptr);
+	if (total_size != fw->size)
+		return ERR_INVALID_SIZE;
+
+	/* The checksum comes at the very end. */
+	chksum_ptr = (void *)fw->data + sizeof(*header) + dmem_size + imem_size;
+
+	init->is_big_endian = is_big_endian;
+	init->dmem_len = dmem_size;
+	init->imem_len = imem_size;
+	init->chksum = (is_big_endian) ? be32_to_cpu(*chksum_ptr) : *chksum_ptr;
+
+	return 0;
+}
+
+/* Verify checksum by reading back the firmware from co-processor RAM. */
+static int __verify_fw_checksum(struct init_data *init,
+				struct private_data *priv,
+				const struct dpfe_firmware_header *header,
+				u32 checksum)
+{
+	u32 magic, sequence, version, sum;
+	u32 __iomem *dmem = priv->dmem;
+	u32 __iomem *imem = priv->imem;
+	unsigned int i;
+
+	if (init->is_big_endian) {
+		magic = be32_to_cpu(header->magic);
+		sequence = be32_to_cpu(header->sequence);
+		version = be32_to_cpu(header->version);
+	} else {
+		magic = header->magic;
+		sequence = header->sequence;
+		version = header->version;
+	}
+
+	sum = magic + sequence + version + init->dmem_len + init->imem_len;
+
+	for (i = 0; i < init->dmem_len / sizeof(u32); i++)
+		sum += readl_relaxed(dmem + i);
+
+	for (i = 0; i < init->imem_len / sizeof(u32); i++)
+		sum += readl_relaxed(imem + i);
+
+	return (sum == checksum) ? 0 : -1;
+}
+
+static int __write_firmware(u32 __iomem *mem, const u32 *fw,
+			    unsigned int size, bool is_big_endian)
+{
+	unsigned int i;
+
+	/* Convert size to 32-bit words. */
+	size /= sizeof(u32);
+
+	/* It is recommended to clear the firmware area first. */
+	for (i = 0; i < size; i++)
+		writel_relaxed(0, mem + i);
+
+	/* Now copy it. */
+	if (is_big_endian) {
+		for (i = 0; i < size; i++)
+			writel_relaxed(be32_to_cpu(fw[i]), mem + i);
+	} else {
+		for (i = 0; i < size; i++)
+			writel_relaxed(fw[i], mem + i);
+	}
+
+	return 0;
+}
+
+static int brcmstb_dpfe_download_firmware(struct platform_device *pdev,
+					  struct init_data *init)
+{
+	const struct dpfe_firmware_header *header;
+	unsigned int dmem_size, imem_size;
+	struct device *dev = &pdev->dev;
+	bool is_big_endian = false;
+	struct private_data *priv;
+	const struct firmware *fw;
+	const u32 *dmem, *imem;
+	const void *fw_blob;
+	int ret;
+
+	ret = request_firmware(&fw, FIRMWARE_NAME, dev);
+	/* request_firmware() prints its own error messages. */
+	if (ret)
+		return ret;
+
+	priv = platform_get_drvdata(pdev);
+
+	ret = __verify_firmware(init, fw);
+	if (ret)
+		return -EFAULT;
+
+	__disable_dcpu(priv->regs);
+
+	is_big_endian = init->is_big_endian;
+	dmem_size = init->dmem_len;
+	imem_size = init->imem_len;
+
+	/* At the beginning of the firmware blob is a header. */
+	header = (struct dpfe_firmware_header *)fw->data;
+	/* Void pointer to the beginning of the actual firmware. */
+	fw_blob = fw->data + sizeof(*header);
+	/* IMEM comes right after the header. */
+	imem = fw_blob;
+	/* DMEM follows after IMEM. */
+	dmem = fw_blob + imem_size;
+
+	ret = __write_firmware(priv->dmem, dmem, dmem_size, is_big_endian);
+	if (ret)
+		return ret;
+	ret = __write_firmware(priv->imem, imem, imem_size, is_big_endian);
+	if (ret)
+		return ret;
+
+	ret = __verify_fw_checksum(init, priv, header, init->chksum);
+	if (ret)
+		return ret;
+
+	__enable_dcpu(priv->regs);
+
+	return 0;
+}
+
+static ssize_t generic_show(unsigned int command, u32 response[],
+			    struct device *dev, char *buf)
+{
+	struct private_data *priv;
+	int ret;
+
+	priv = dev_get_drvdata(dev);
+	if (!priv)
+		return sprintf(buf, "ERROR: driver private data not set\n");
+
+	ret = __send_command(priv, command, response);
+	if (ret < 0)
+		return sprintf(buf, "ERROR: %s\n", error_text[-ret]);
+
+	return 0;
+}
+
+static ssize_t show_info(struct device *dev, struct device_attribute *devattr,
+			 char *buf)
+{
+	u32 response[MSG_FIELD_MAX];
+	unsigned int info;
+	int ret;
+
+	ret = generic_show(DPFE_CMD_GET_INFO, response, dev, buf);
+	if (ret)
+		return ret;
+
+	info = response[MSG_ARG0];
+
+	return sprintf(buf, "%u.%u.%u.%u\n",
+		       (info >> 24) & 0xff,
+		       (info >> 16) & 0xff,
+		       (info >> 8) & 0xff,
+		       info & 0xff);
+}
+
+static ssize_t show_refresh(struct device *dev,
+			    struct device_attribute *devattr, char *buf)
+{
+	u32 response[MSG_FIELD_MAX];
+	void __iomem *info;
+	struct private_data *priv;
+	unsigned int offset;
+	u8 refresh, sr_abort, ppre, thermal_offs, tuf;
+	u32 mr4;
+	int ret;
+
+	ret = generic_show(DPFE_CMD_GET_REFRESH, response, dev, buf);
+	if (ret)
+		return ret;
+
+	priv = dev_get_drvdata(dev);
+	offset = response[MSG_ARG0];
+	info = priv->dmem + offset;
+
+	mr4 = readl_relaxed(info + DRAM_INFO_MR4) & DRAM_INFO_MR4_MASK;
+
+	refresh = (mr4 >> DRAM_MR4_REFRESH) & DRAM_MR4_REFRESH_MASK;
+	sr_abort = (mr4 >> DRAM_MR4_SR_ABORT) & DRAM_MR4_SR_ABORT_MASK;
+	ppre = (mr4 >> DRAM_MR4_PPRE) & DRAM_MR4_PPRE_MASK;
+	thermal_offs = (mr4 >> DRAM_MR4_TH_OFFS) & DRAM_MR4_TH_OFFS_MASK;
+	tuf = (mr4 >> DRAM_MR4_TUF) & DRAM_MR4_TUF_MASK;
+
+	return sprintf(buf, "%#x %#x %#x %#x %#x %#x %#x\n",
+		       readl_relaxed(info + DRAM_INFO_INTERVAL),
+		       refresh, sr_abort, ppre, thermal_offs, tuf,
+		       readl_relaxed(info + DRAM_INFO_ERROR));
+}
+
+static ssize_t store_refresh(struct device *dev, struct device_attribute *attr,
+			  const char *buf, size_t count)
+{
+	u32 response[MSG_FIELD_MAX];
+	struct private_data *priv;
+	void __iomem *info;
+	unsigned int offset;
+	unsigned long val;
+	int ret;
+
+	if (kstrtoul(buf, 0, &val) < 0)
+		return -EINVAL;
+
+	priv = dev_get_drvdata(dev);
+
+	ret = __send_command(priv, DPFE_CMD_GET_REFRESH, response);
+	if (ret)
+		return ret;
+
+	offset = response[MSG_ARG0];
+	info = priv->dmem + offset;
+	writel_relaxed(val, info + DRAM_INFO_INTERVAL);
+
+	return count;
+}
+
+static ssize_t show_vendor(struct device *dev, struct device_attribute *devattr,
+			 char *buf)
+{
+	u32 response[MSG_FIELD_MAX];
+	struct private_data *priv;
+	void __iomem *info;
+	unsigned int offset;
+	int ret;
+
+	ret = generic_show(DPFE_CMD_GET_VENDOR, response, dev, buf);
+	if (ret)
+		return ret;
+
+	offset = response[MSG_ARG0];
+	priv = dev_get_drvdata(dev);
+	info = priv->dmem + offset;
+
+	return sprintf(buf, "%#x %#x %#x %#x %#x\n",
+		       readl_relaxed(info + DRAM_VENDOR_MR5) & DRAM_VENDOR_MASK,
+		       readl_relaxed(info + DRAM_VENDOR_MR6) & DRAM_VENDOR_MASK,
+		       readl_relaxed(info + DRAM_VENDOR_MR7) & DRAM_VENDOR_MASK,
+		       readl_relaxed(info + DRAM_VENDOR_MR8) & DRAM_VENDOR_MASK,
+		       readl_relaxed(info + DRAM_VENDOR_ERROR));
+}
+
+static int brcmstb_dpfe_resume(struct platform_device *pdev)
+{
+	struct init_data init;
+
+	return brcmstb_dpfe_download_firmware(pdev, &init);
+}
+
+static DEVICE_ATTR(dpfe_info, 0444, show_info, NULL);
+static DEVICE_ATTR(dpfe_refresh, 0644, show_refresh, store_refresh);
+static DEVICE_ATTR(dpfe_vendor, 0444, show_vendor, NULL);
+static struct attribute *dpfe_attrs[] = {
+	&dev_attr_dpfe_info.attr,
+	&dev_attr_dpfe_refresh.attr,
+	&dev_attr_dpfe_vendor.attr,
+	NULL
+};
+ATTRIBUTE_GROUPS(dpfe);
+
+static int brcmstb_dpfe_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct private_data *priv;
+	struct device *dpfe_dev;
+	struct init_data init;
+	struct resource *res;
+	u32 index;
+	int ret;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	mutex_init(&priv->lock);
+	platform_set_drvdata(pdev, priv);
+
+	/* Cell index is optional; default to 0 if not present. */
+	ret = of_property_read_u32(dev->of_node, "cell-index", &index);
+	if (ret)
+		index = 0;
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dpfe-cpu");
+	priv->regs = devm_ioremap_resource(dev, res);
+	if (IS_ERR(priv->regs)) {
+		dev_err(dev, "couldn't map DCPU registers\n");
+		return -ENODEV;
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dpfe-dmem");
+	priv->dmem = devm_ioremap_resource(dev, res);
+	if (IS_ERR(priv->dmem)) {
+		dev_err(dev, "Couldn't map DCPU data memory\n");
+		return -ENOENT;
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dpfe-imem");
+	priv->imem = devm_ioremap_resource(dev, res);
+	if (IS_ERR(priv->imem)) {
+		dev_err(dev, "Couldn't map DCPU instruction memory\n");
+		return -ENOENT;
+	}
+
+	ret = brcmstb_dpfe_download_firmware(pdev, &init);
+	if (ret)
+		goto err;
+
+	dpfe_dev = devm_kzalloc(dev, sizeof(*dpfe_dev), GFP_KERNEL);
+	if (!dpfe_dev) {
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	priv->dev = dpfe_dev;
+	priv->index = index;
+
+	dpfe_dev->parent = dev;
+	dpfe_dev->groups = dpfe_groups;
+	dpfe_dev->of_node = dev->of_node;
+	dev_set_drvdata(dpfe_dev, priv);
+	dev_set_name(dpfe_dev, "dpfe%u", index);
+
+	ret = device_register(dpfe_dev);
+	if (ret)
+		goto err;
+
+	dev_info(dev, "registered.\n");
+
+	return 0;
+
+err:
+	dev_err(dev, "failed to initialize -- error %d\n", ret);
+
+	return ret;
+}
+
+static const struct of_device_id brcmstb_dpfe_of_match[] = {
+	{ .compatible = "brcm,dpfe-cpu", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, brcmstb_dpfe_of_match);
+
+static struct platform_driver brcmstb_dpfe_driver = {
+	.driver	= {
+		.name = DRVNAME,
+		.of_match_table = brcmstb_dpfe_of_match,
+	},
+	.probe = brcmstb_dpfe_probe,
+	.resume = brcmstb_dpfe_resume,
+};
+
+module_platform_driver(brcmstb_dpfe_driver);
+
+MODULE_AUTHOR("Markus Mayer <mmayer@broadcom.com>");
+MODULE_DESCRIPTION("BRCMSTB DDR PHY Front End Driver");
+MODULE_LICENSE("GPL");
