Message-ID: <1373972146-12133-1-git-send-email-sonic.adi@gmail.com>
Date:	Tue, 16 Jul 2013 18:55:44 +0800
From:	Sonic Zhang <sonic.adi@...il.com>
To:	Linus Walleij <linus.walleij@...aro.org>,
	Grant Likely <grant.likely@...aro.org>,
	Steven Miao <realmz6@...il.com>
CC:	LKML <linux-kernel@...r.kernel.org>,
	<buildroot-devel@...ckfin.uclinux.org>,
	<adi-buildroot-devel@...ts.sourceforge.net>,
	Sonic Zhang <sonic.zhang@...log.com>
Subject: [PATCH 1/3] pinctrl: ADI PIN control driver for the GPIO controller on bf54x and bf60x.

From: Sonic Zhang <sonic.zhang@...log.com>

The new ADI GPIO2 controller was introduced since the BF548 and BF60x
processors. It differs a lot from the old one on BF5xx processors. So,
create a pinctrl driver under pinctrl framework.

- Define gpio ports and gpio interrupt controllers as individual platform
devices.
- Register a pinctrl driver for the whole GPIO ports and GPIO interrupt
devices.
- Probe pint devices before port devices. Put device instances into
respective gpio and pint lists.
- Define peripheral, irq and gpio reservation bit masks for each gpio
port as runtime resources.
- Save and restore gpio port and pint status MMRs in syscore PM functions.
- Add peripheral device groups and function data into machine portmux.h.
- Handle peripheral and gpio requests in pinctrl operation functions.
- Demux gpio IRQs via the irq_domain created by each GPIO port.

Signed-off-by: Sonic Zhang <sonic.zhang@...log.com>
---
 drivers/pinctrl/Makefile                   |    1 +
 drivers/pinctrl/pinctrl-adi2.c             | 1545 ++++++++++++++++++++++++++++
 include/linux/platform_data/pinctrl-adi2.h |   38 +
 3 files changed, 1584 insertions(+)
 create mode 100644 drivers/pinctrl/pinctrl-adi2.c
 create mode 100644 include/linux/platform_data/pinctrl-adi2.h

diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index d64563bf..c685958 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_PINCTRL_AB8500)	+= pinctrl-ab8500.o
 obj-$(CONFIG_PINCTRL_AB8540)	+= pinctrl-ab8540.o
 obj-$(CONFIG_PINCTRL_AB9540)	+= pinctrl-ab9540.o
 obj-$(CONFIG_PINCTRL_AB8505)	+= pinctrl-ab8505.o
+obj-$(CONFIG_PINCTRL_ADI2)	+= pinctrl-adi2.o
 obj-$(CONFIG_PINCTRL_AT91)	+= pinctrl-at91.o
 obj-$(CONFIG_PINCTRL_BCM2835)	+= pinctrl-bcm2835.o
 obj-$(CONFIG_PINCTRL_BAYTRAIL)	+= pinctrl-baytrail.o
diff --git a/drivers/pinctrl/pinctrl-adi2.c b/drivers/pinctrl/pinctrl-adi2.c
new file mode 100644
index 0000000..222a74c
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-adi2.c
@@ -0,0 +1,1545 @@
+/*
+ * Pinctrl Driver for ADI GPIO2 controller
+ *
+ * Copyright 2007-2013 Analog Devices Inc.
+ *
+ * Licensed under the GPLv2 or later
+ */
+
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/irq.h>
+#include <linux/platform_data/pinctrl-adi2.h>
+#include <linux/irqdomain.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/machine.h>
+#include <linux/syscore_ops.h>
+#include <linux/gpio.h>
+#include <asm/portmux.h>
+#include "core.h"
+
+static LIST_HEAD(adi_pint_list);
+static LIST_HEAD(adi_pinctrl_list);
+
+#define PERIPHERAL_USAGE 1
+#define GPIO_USAGE 0
+
+#define DRIVER_NAME "pinctrl-adi2"
+
+#define RESOURCE_LABEL_SIZE	16
+#define PINT_HI_OFFSET		16
+
+#define RSV_NONE	0
+#define RSV_GPIO	1
+#define RSV_INT		2
+#define RSV_PERI	3
+
+/**
+ * struct gpio_reserve_map - a GPIO map structure containing the
+ * reservation status of each PIN.
+ *
+ * @owner: who request the reservation
+ * @rsv_gpio: if this pin is reserved as GPIO
+ * @rsv_int: if this pin is reserved as interrupt
+ * @rsv_peri: if this pin is reserved as part of a peripheral device
+ */
+struct gpio_reserve_map {
+	unsigned char owner[RESOURCE_LABEL_SIZE];
+	bool rsv_gpio;
+	bool rsv_int;
+	bool rsv_peri;
+};
+
+/**
+ * struct gpio_port_saved - GPIO port registers that should be saved between
+ * power suspend and resume operations.
+ *
+ * @fer: PORTx_FER register
+ * @data: PORTx_DATA register
+ * @dir: PORTx_DIR register
+ * @inen: PORTx_INEN register
+ * @mux: PORTx_MUX register
+ */
+struct gpio_port_saved {
+	u16 fer;
+	u16 data;
+	u16 dir;
+	u16 inen;
+	u32 mux;
+};
+
+/**
+ * struct gpio_pint - GPIO interrupt controller device. Multiple ADI GPIO
+ * banks can be mapped into one GPIO interrupt controller.
+ *
+ * @node: All gpio_pint instances are added to a global list.
+ * @base: GPIO PINT device register base address
+ * @irq: IRQ of the GPIO PINT device, it is the parent IRQ of all
+ *       GPIO IRQs mapping to this device.
+ * @domain: [0] irq domain of the gpio port, whose hardware interrupts are
+ *		mapping to the low 16-bit of the pint registers.
+ *          [1] irq domain of the gpio port, whose hardware interrupts are
+ *		mapping to the high 16-bit of the pint registers.
+ * @regs: address pointer to the GPIO PINT device
+ * @map_count: No more than 2 GPIO banks can be mapped to this PINT device.
+ * @lock: This lock make sure the irq_chip operations to one GPIO PINT device
+ *        for different GPIO interrrupts are atomic.
+ * @pint_map_port: Set up the mapping between one GPIO PINT device and
+ *                 multiple GPIO banks.
+ */
+struct gpio_pint {
+	struct list_head node;
+	void __iomem *base;
+	int irq;
+	struct irq_domain *domain[2];
+	struct gpio_pint_regs *regs;
+	struct adi_pm_pint_save saved_data;
+	int map_count;
+	spinlock_t lock;
+
+	int (*pint_map_port)(struct gpio_pint *pint, u8 assign,
+				u8 map, struct irq_domain *domain);
+};
+
+/**
+ * ADI pin controller
+ *
+ * @node: All adi_pmx instances are added to a global list.
+ * @dev: a pointer back to containing device
+ * @pctl: the pinctrl device
+ * @gpio_list: the list of gpio banks owned by this pin controller.
+ * @gpio_base: the base gpio number of this pin controller.
+ */
+struct adi_pmx {
+	struct list_head node;
+	struct device *dev;
+	struct pinctrl_dev *pctl;
+	struct list_head gpio_list;
+	unsigned long gpio_base;
+};
+
+/**
+ * struct gpio_pint - GPIO bank device. Multiple ADI GPIO banks can be mapped
+ * into one GPIO interrupt controller.
+ *
+ * @node: All gpio_pint instances are added to a list.
+ * @base: GPIO bank device register base address
+ * @pin_base: base global GPIO pin index of the GPIO bank device
+ * @irq_base: base IRQ of the GPIO bank device
+ * @width: PIN number of the GPIO bank device
+ * @range: The range space of the GPIO bank handled by the pin controller.
+ * @regs: address pointer to the GPIO bank device
+ * @saved_data: registers that should be saved between PM operations.
+ * @dev: device structure of this GPIO bank
+ * @pmx: the pinctrl device
+ * @pint: GPIO PINT device that this GPIO bank mapped to
+ * @pint_map: GIOP bank mapping code in PINT device
+ * @pint_assign: The 32-bit GPIO PINT registers can be divided into 2 parts. A
+ *               GPIO bank can be mapped into either low 16 bits[0] or high 16
+ *               bits[1] of each PINT register.
+ * @lock: This lock make sure the irq_chip operations to one GPIO PINT device
+ *        for different GPIO interrrupts are atomic.
+ * @chip: abstract a GPIO controller
+ * @domain: The irq domain owned by the GPIO port.
+ * @rsvmap: Reservation map array for each pin in the GPIO bank
+ */
+struct gpio_port {
+	struct list_head node;
+	void __iomem *base;
+	unsigned int pin_base;
+	unsigned int irq_base;
+	unsigned int width;
+	struct pinctrl_gpio_range range;
+	struct gpio_port_t *regs;
+	struct gpio_port_saved saved_data;
+	struct device *dev;
+	struct adi_pmx *pmx;
+
+	struct gpio_pint *pint;
+	u8 pint_map;
+	u8 pint_assign;
+
+	spinlock_t lock;
+	struct gpio_chip chip;
+	struct irq_domain *domain;
+
+	struct gpio_reserve_map rsvmap[];
+};
+
+static inline u8 pin_to_offset(struct pinctrl_gpio_range *range, unsigned pin)
+{
+	return pin - range->pin_base;
+}
+
+static inline unsigned offset_to_gpio(struct gpio_port *port, u8 offset)
+{
+	return offset + port->chip.base;
+}
+
+static inline u8 gpio_to_offset(struct gpio_port *port, unsigned gpio)
+{
+	return gpio - port->chip.base;
+}
+
+static inline unsigned hwirq_to_pintbit(struct gpio_port *port, int hwirq)
+{
+	return (1 << hwirq) << (port->pint_assign * PINT_HI_OFFSET);
+}
+
+static void set_label(struct gpio_port *port, unsigned offset,
+	const char *label)
+{
+	char *pch = port->rsvmap[offset].owner;
+
+	if (label) {
+		strncpy(pch, label, RESOURCE_LABEL_SIZE);
+		pch[RESOURCE_LABEL_SIZE - 1] = 0;
+	}
+}
+
+static char *get_label(struct gpio_port *port, unsigned offset)
+{
+	char *pch = port->rsvmap[offset].owner;
+
+	return *pch ? pch : "UNKNOWN";
+}
+
+static inline unsigned int is_reserved(struct gpio_port *port, char type,
+	unsigned offset)
+{
+	switch (type) {
+	case RSV_GPIO:
+		return port->rsvmap[offset].rsv_gpio == true;
+	case RSV_INT:
+		return port->rsvmap[offset].rsv_int == true;
+	case RSV_PERI:
+		return port->rsvmap[offset].rsv_peri == true;
+	}
+
+	return 0;
+}
+
+static inline void reserve(struct gpio_port *port, char type, unsigned offset)
+{
+	switch (type) {
+	case RSV_GPIO:
+		port->rsvmap[offset].rsv_gpio = true;
+		break;
+	case RSV_INT:
+		port->rsvmap[offset].rsv_int = true;
+		break;
+	case RSV_PERI:
+		port->rsvmap[offset].rsv_peri = true;
+		break;
+	}
+}
+
+static inline void unreserve(struct gpio_port *port, char type, unsigned offset)
+{
+	switch (type) {
+	case RSV_GPIO:
+		port->rsvmap[offset].rsv_gpio = false;
+		break;
+	case RSV_INT:
+		port->rsvmap[offset].rsv_int = false;
+		break;
+	case RSV_PERI:
+		port->rsvmap[offset].rsv_peri = false;
+		break;
+	}
+}
+
+static struct gpio_pint *find_gpio_pint(unsigned id)
+{
+	struct gpio_pint *pint;
+	int i = 0;
+
+	list_for_each_entry(pint, &adi_pint_list, node) {
+		if (id == i)
+			break;
+		i++;
+	}
+
+	if (&pint->node != &adi_pint_list)
+		return pint;
+	else
+		return NULL;
+}
+
+static struct adi_pmx *find_pinctrl(unsigned id)
+{
+	struct adi_pmx *pmx;
+	int i = 0;
+
+	list_for_each_entry(pmx, &adi_pinctrl_list, node) {
+		if (id == i)
+			break;
+		i++;
+	}
+
+	if (&pmx->node != &adi_pinctrl_list)
+		return pmx;
+	else
+		return NULL;
+}
+
+static struct gpio_port *find_gpio_port(unsigned pin,
+	struct list_head *gpio_list)
+{
+	struct gpio_port *port;
+
+	list_for_each_entry(port, gpio_list, node)
+		if (pin >= port->range.pin_base &&
+			pin < port->range.pin_base + port->range.npins)
+			break;
+
+	if (&port->node != gpio_list)
+		return port;
+	else
+		return NULL;
+}
+
+static inline void port_setup(struct gpio_port *port, unsigned offset,
+	unsigned short usage)
+{
+	struct gpio_port_t *regs = port->regs;
+
+	if (usage == GPIO_USAGE)
+		writew(readw(&regs->port_fer) & ~(1 << offset),
+			&regs->port_fer);
+	else
+		writew(readw(&regs->port_fer) | (1 << offset), &regs->port_fer);
+}
+
+static inline void portmux_setup(struct gpio_port *port, unsigned offset,
+	unsigned short function)
+{
+	struct gpio_port_t *regs = port->regs;
+	u32 pmux;
+
+	pmux = readl(&regs->port_mux);
+
+	pmux &= ~(0x3 << (2 * offset));
+	pmux |= (function & 0x3) << (2 * offset);
+
+	writel(pmux, &regs->port_mux);
+}
+
+static inline u16 get_portmux(struct gpio_port *port, unsigned offset)
+{
+	struct gpio_port_t *regs = port->regs;
+	u32 pmux = readl(&regs->port_mux);
+
+	return pmux >> (2 * offset) & 0x3;
+}
+
+
+static void __adi_gpio_irq_prepare(struct gpio_port *port, unsigned offset)
+{
+	struct gpio_port_t *regs = port->regs;
+
+	port_setup(port, offset, GPIO_USAGE);
+
+	writew(1 << offset, &regs->dir_clear);
+	writew(readw(&regs->inen) | (1 << offset), &regs->inen);
+}
+
+static int __adi_gpio_irq_request(struct gpio_port *port, unsigned offset,
+	const char *label)
+{
+	if (unlikely(is_reserved(port, RSV_PERI, offset))) {
+		if (system_state == SYSTEM_BOOTING)
+			dump_stack();
+
+		dev_err(port->dev,
+		       "GPIO %d is already reserved as Peripheral by %s !\n",
+			offset_to_gpio(port, offset), get_label(port, offset));
+		return -EBUSY;
+	}
+	if (unlikely(is_reserved(port, RSV_GPIO, offset)))
+		dev_err(port->dev,
+			"GPIO %d is already reserved by %s!\n",
+			offset_to_gpio(port, offset), get_label(port, offset));
+
+	reserve(port, RSV_INT, offset);
+	set_label(port, offset, label);
+	port_setup(port, offset, GPIO_USAGE);
+
+	return 0;
+}
+
+static void __adi_gpio_irq_free(struct gpio_port *port, unsigned offset)
+{
+	if (unlikely(!is_reserved(port, RSV_INT, offset))) {
+		if (system_state == SYSTEM_BOOTING)
+			dump_stack();
+
+		dev_err(port->dev, "GPIO %d wasn't requested!\n",
+			offset_to_gpio(port, offset));
+		return;
+	}
+
+	unreserve(port, RSV_INT, offset);
+	set_label(port, offset, "free");
+}
+
+static void adi_gpio_ack_irq(struct irq_data *d)
+{
+	unsigned long flags;
+	struct gpio_port *port = irq_data_get_irq_chip_data(d);
+	struct gpio_pint_regs *regs = port->pint->regs;
+	unsigned pintbit = hwirq_to_pintbit(port, d->hwirq);
+
+	spin_lock_irqsave(&port->lock, flags);
+	spin_lock_irqsave(&port->pint->lock, flags);
+
+	if (irqd_get_trigger_type(d) == IRQ_TYPE_EDGE_BOTH) {
+		if (readl(&regs->invert_set) & pintbit)
+			writel(pintbit, &regs->invert_clear);
+		else
+			writel(pintbit, &regs->invert_set);
+	}
+
+	writel(pintbit, &regs->request);
+
+	spin_unlock_irqrestore(&port->pint->lock, flags);
+	spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static void adi_gpio_mask_ack_irq(struct irq_data *d)
+{
+	unsigned long flags;
+	struct gpio_port *port = irq_data_get_irq_chip_data(d);
+	struct gpio_pint_regs *regs = port->pint->regs;
+	unsigned pintbit = hwirq_to_pintbit(port, d->hwirq);
+
+	spin_lock_irqsave(&port->lock, flags);
+	spin_lock_irqsave(&port->pint->lock, flags);
+
+	if (irqd_get_trigger_type(d) == IRQ_TYPE_EDGE_BOTH) {
+		if (readl(&regs->invert_set) & pintbit)
+			writel(pintbit, &regs->invert_clear);
+		else
+			writel(pintbit, &regs->invert_set);
+	}
+
+	writel(pintbit, &regs->request);
+	writel(pintbit, &regs->mask_clear);
+
+	spin_unlock_irqrestore(&port->pint->lock, flags);
+	spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static void adi_gpio_mask_irq(struct irq_data *d)
+{
+	unsigned long flags;
+	struct gpio_port *port = irq_data_get_irq_chip_data(d);
+	struct gpio_pint_regs *regs = port->pint->regs;
+
+	spin_lock_irqsave(&port->lock, flags);
+	spin_lock_irqsave(&port->pint->lock, flags);
+
+	writel(hwirq_to_pintbit(port, d->hwirq), &regs->mask_clear);
+
+	spin_unlock_irqrestore(&port->pint->lock, flags);
+	spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static void adi_gpio_unmask_irq(struct irq_data *d)
+{
+	unsigned long flags;
+	struct gpio_port *port = irq_data_get_irq_chip_data(d);
+	struct gpio_pint_regs *regs = port->pint->regs;
+
+	spin_lock_irqsave(&port->lock, flags);
+	spin_lock_irqsave(&port->pint->lock, flags);
+
+	writel(hwirq_to_pintbit(port, d->hwirq), &regs->mask_set);
+
+	spin_unlock_irqrestore(&port->pint->lock, flags);
+	spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static unsigned int adi_gpio_irq_startup(struct irq_data *d)
+{
+	unsigned long flags;
+	struct gpio_port *port = irq_data_get_irq_chip_data(d);
+	struct gpio_pint_regs *regs = port->pint->regs;
+
+	if (!port) {
+		dev_err(port->dev, "GPIO IRQ %d :Not exist\n", d->irq);
+		return -ENODEV;
+	}
+
+	spin_lock_irqsave(&port->lock, flags);
+	spin_lock_irqsave(&port->pint->lock, flags);
+
+	__adi_gpio_irq_prepare(port, d->hwirq);
+	writel(hwirq_to_pintbit(port, d->hwirq), &regs->mask_set);
+
+	spin_unlock_irqrestore(&port->pint->lock, flags);
+	spin_unlock_irqrestore(&port->lock, flags);
+
+	return 0;
+}
+
+static void adi_gpio_irq_shutdown(struct irq_data *d)
+{
+	unsigned long flags;
+	struct gpio_port *port = irq_data_get_irq_chip_data(d);
+	struct gpio_pint_regs *regs = port->pint->regs;
+
+	spin_lock_irqsave(&port->lock, flags);
+	spin_lock_irqsave(&port->pint->lock, flags);
+
+	writel(hwirq_to_pintbit(port, d->hwirq), &regs->mask_clear);
+	__adi_gpio_irq_free(port, d->hwirq);
+
+	spin_unlock_irqrestore(&port->pint->lock, flags);
+	spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static int adi_gpio_irq_type(struct irq_data *d, unsigned int type)
+{
+	unsigned long flags;
+	struct gpio_port *port = irq_data_get_irq_chip_data(d);
+	struct gpio_pint_regs *pint_regs = port->pint->regs;
+	unsigned pintmask;
+	unsigned int irq = d->irq;
+	int ret = 0;
+	char buf[16];
+
+	if (!port) {
+		dev_err(port->dev, "GPIO IRQ %d :Not exist\n", irq);
+		return -ENODEV;
+	}
+
+	pintmask = hwirq_to_pintbit(port, d->hwirq);
+
+	spin_lock_irqsave(&port->lock, flags);
+	spin_lock_irqsave(&port->pint->lock, flags);
+
+	if (type == IRQ_TYPE_PROBE)
+		type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
+
+	if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING |
+		    IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
+		snprintf(buf, 16, "gpio-irq%d", irq);
+		ret = __adi_gpio_irq_request(port, d->hwirq, buf);
+		if (ret)
+			goto out;
+	} else
+		goto out;
+
+	if ((type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW)))
+		/* low or falling edge denoted by one */
+		writel(pintmask, &pint_regs->invert_set);
+	else
+		/* high or rising edge denoted by zero */
+		writel(pintmask, &pint_regs->invert_clear);
+
+	if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) {
+		if (gpio_get_value(offset_to_gpio(port, d->hwirq)))
+			writel(pintmask, &pint_regs->invert_set);
+		else
+			writel(pintmask, &pint_regs->invert_clear);
+	}
+
+	if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
+		writel(pintmask, &pint_regs->edge_set);
+		__irq_set_handler_locked(irq, handle_edge_irq);
+	} else {
+		writel(pintmask, &pint_regs->edge_clear);
+		__irq_set_handler_locked(irq, handle_level_irq);
+	}
+
+out:
+	spin_unlock_irqrestore(&port->pint->lock, flags);
+	spin_unlock_irqrestore(&port->lock, flags);
+
+	return ret;
+}
+
+#ifdef CONFIG_PM
+static int adi_gpio_set_wake(struct irq_data *d, unsigned int state)
+{
+	struct gpio_port *port = irq_data_get_irq_chip_data(d);
+
+	if (!port && !port->pint && port->pint->irq != d->irq)
+		return -EINVAL;
+
+#ifndef SEC_GCTL
+	adi_internal_set_wake(port->pint->irq, state);
+#endif
+
+	return 0;
+}
+
+static int adi_pint_suspend(void)
+{
+	struct gpio_pint *pint;
+
+	list_for_each_entry(pint, &adi_pint_list, node) {
+		writel(0xffffffff, &pint->regs->mask_clear);
+		pint->saved_data.assign = readl(&pint->regs->assign);
+		pint->saved_data.edge_set = readl(&pint->regs->edge_set);
+		pint->saved_data.invert_set = readl(&pint->regs->invert_set);
+	}
+
+	return 0;
+}
+
+static void adi_pint_resume(void)
+{
+	struct gpio_pint *pint;
+
+	list_for_each_entry(pint, &adi_pint_list, node) {
+		writel(pint->saved_data.assign, &pint->regs->assign);
+		writel(pint->saved_data.edge_set, &pint->regs->edge_set);
+		writel(pint->saved_data.invert_set, &pint->regs->invert_set);
+	}
+}
+
+static int adi_gpio_suspend(void)
+{
+	struct adi_pmx *pmx;
+	struct gpio_port *port;
+
+	list_for_each_entry(pmx, &adi_pinctrl_list, node)
+		list_for_each_entry(port, &pmx->gpio_list, node) {
+			port->saved_data.fer = readw(&port->regs->port_fer);
+			port->saved_data.mux = readl(&port->regs->port_mux);
+			port->saved_data.data = readw(&port->regs->data);
+			port->saved_data.inen = readw(&port->regs->inen);
+			port->saved_data.dir = readw(&port->regs->dir_set);
+		}
+
+	return adi_pint_suspend();
+}
+
+static void adi_gpio_resume(void)
+{
+	struct adi_pmx *pmx;
+	struct gpio_port *port;
+
+	adi_pint_resume();
+
+	list_for_each_entry(pmx, &adi_pinctrl_list, node)
+		list_for_each_entry(port, &pmx->gpio_list, node) {
+			writel(port->saved_data.mux, &port->regs->port_mux);
+			writew(port->saved_data.fer, &port->regs->port_fer);
+			writew(port->saved_data.inen, &port->regs->inen);
+			writew(port->saved_data.data & port->saved_data.dir,
+						&port->regs->data_set);
+			writew(port->saved_data.dir, &port->regs->dir_set);
+		}
+
+}
+
+static struct syscore_ops gpio_pm_syscore_ops = {
+	.suspend = adi_gpio_suspend,
+	.resume = adi_gpio_resume,
+};
+#else /* CONFIG_PM */
+#define adi_gpio_set_wake NULL
+#endif /* CONFIG_PM */
+
+#ifdef CONFIG_IRQ_PREFLOW_FASTEOI
+static inline void preflow_handler(struct irq_desc *desc)
+{
+	if (desc->preflow_handler)
+		desc->preflow_handler(&desc->irq_data);
+}
+#else
+static inline void preflow_handler(struct irq_desc *desc) { }
+#endif
+
+static void adi_gpio_handle_pint_irq(unsigned int inta_irq,
+			struct irq_desc *desc)
+{
+	u32 request;
+	u32 level_mask, hwirq;
+	int umask = 0;
+	struct gpio_pint *pint = irq_desc_get_handler_data(desc);
+	struct irq_chip *chip = irq_desc_get_chip(desc);
+	struct gpio_pint_regs *regs = pint->regs;
+	struct irq_domain *domain;
+
+	preflow_handler(desc);
+	chained_irq_enter(chip, desc);
+
+	request = readl(&regs->request);
+	level_mask = readl(&regs->edge_set) & request;
+
+	hwirq = 0;
+	domain = pint->domain[0];
+	while (request) {
+		if (hwirq == PINT_HI_OFFSET)
+			domain = pint->domain[1];
+
+		if (request & 1) {
+			if (level_mask & (1 << hwirq)) {
+				umask = 1;
+				chained_irq_exit(chip, desc);
+			}
+			generic_handle_irq(irq_find_mapping(domain,
+					hwirq % PINT_HI_OFFSET));
+		}
+
+		hwirq++;
+		request >>= 1;
+	}
+
+	if (!umask)
+		chained_irq_exit(chip, desc);
+}
+
+static struct irq_chip adi_gpio_irqchip = {
+	.name = "GPIO",
+	.irq_ack = adi_gpio_ack_irq,
+	.irq_mask = adi_gpio_mask_irq,
+	.irq_mask_ack = adi_gpio_mask_ack_irq,
+	.irq_unmask = adi_gpio_unmask_irq,
+	.irq_disable = adi_gpio_mask_irq,
+	.irq_enable = adi_gpio_unmask_irq,
+	.irq_set_type = adi_gpio_irq_type,
+	.irq_startup = adi_gpio_irq_startup,
+	.irq_shutdown = adi_gpio_irq_shutdown,
+	.irq_set_wake = adi_gpio_set_wake,
+};
+
+
+static int adi_get_groups_count(struct pinctrl_dev *pctldev)
+{
+	return ARRAY_SIZE(adi_pin_groups);
+}
+
+static const char *adi_get_group_name(struct pinctrl_dev *pctldev,
+				       unsigned selector)
+{
+	return adi_pin_groups[selector].name;
+}
+
+static int adi_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector,
+			       const unsigned **pins,
+			       unsigned *num_pins)
+{
+	*pins = adi_pin_groups[selector].pins;
+	*num_pins = adi_pin_groups[selector].num;
+	return 0;
+}
+
+static void adi_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
+		   unsigned offset)
+{
+	seq_puts(s, DRIVER_NAME);
+}
+
+static struct pinctrl_ops adi_pctrl_ops = {
+	.get_groups_count = adi_get_groups_count,
+	.get_group_name = adi_get_group_name,
+	.get_group_pins = adi_get_group_pins,
+	.pin_dbg_show = adi_pin_dbg_show,
+};
+
+static int adi_pinmux_request(struct pinctrl_dev *pctldev, unsigned pin)
+{
+	struct adi_pmx *pmx;
+	struct gpio_port *port;
+	unsigned long flags;
+	struct pin_desc *desc;
+	u8 offset;
+
+	pmx = pinctrl_dev_get_drvdata(pctldev);
+
+	port = find_gpio_port(pin, &pmx->gpio_list);
+	if (port == NULL) {
+		dev_err(pctldev->dev,
+		       "%s: Peripheral PIN %d doesn't exist!\n",
+		       __func__, pin);
+		return -ENODEV;
+	}
+
+	offset = pin_to_offset(&port->range, pin);
+	desc = radix_tree_lookup(&pctldev->pin_desc_tree, pin);
+
+	spin_lock_irqsave(&port->lock, flags);
+
+	/* If a pin can be muxed as either GPIO or peripheral, make
+	 * sure it is not already a GPIO pin when we request it.
+	 */
+	if (unlikely(is_reserved(port, RSV_GPIO, offset))) {
+		if (system_state == SYSTEM_BOOTING)
+			dump_stack();
+		dev_err(pctldev->dev,
+		       "%s: Peripheral PIN %d is already reserved as GPIO by %s!\n",
+		       __func__, pin, get_label(port, offset));
+		spin_unlock_irqrestore(&port->lock, flags);
+		return -EBUSY;
+	}
+
+	if (unlikely(is_reserved(port, RSV_PERI, offset))) {
+		if (system_state == SYSTEM_BOOTING)
+			dump_stack();
+		dev_err(pctldev->dev,
+			"%s: Peripheral PIN %d is already reserved by %s!\n",
+			__func__, pin, get_label(port, offset));
+		spin_unlock_irqrestore(&port->lock, flags);
+		return -EBUSY;
+	}
+
+	reserve(port, RSV_PERI, offset);
+	set_label(port, offset, desc->mux_owner);
+
+	spin_unlock_irqrestore(&port->lock, flags);
+
+	return 0;
+}
+
+static int adi_pinmux_free(struct pinctrl_dev *pctldev, unsigned pin)
+{
+	struct adi_pmx *pmx;
+	struct gpio_port *port;
+	unsigned long flags;
+	u8 offset;
+
+	pmx = pinctrl_dev_get_drvdata(pctldev);
+	port = find_gpio_port(pin, &pmx->gpio_list);
+	if (port == NULL)
+		return 0;
+
+	offset = pin_to_offset(&port->range, pin);
+
+	spin_lock_irqsave(&port->lock, flags);
+
+	if (unlikely(!is_reserved(port, RSV_PERI, offset))) {
+		spin_unlock_irqrestore(&port->lock, flags);
+		return 0;
+	}
+
+	unreserve(port, RSV_PERI, offset);
+	set_label(port, offset, "free");
+
+	spin_unlock_irqrestore(&port->lock, flags);
+
+	return 0;
+}
+
+static int adi_pinmux_enable(struct pinctrl_dev *pctldev, unsigned selector,
+	unsigned group)
+{
+	struct adi_pmx *pmx;
+	struct gpio_port *port;
+	unsigned long flags;
+	unsigned short *mux = (unsigned short *)adi_pmx_functions[selector].mux;
+	unsigned short gpio;
+
+	pmx = pinctrl_dev_get_drvdata(pctldev);
+
+	while (*mux) {
+		gpio = P_IDENT(*mux);
+
+		port = find_gpio_port(gpio - pmx->gpio_base, &pmx->gpio_list);
+		if (port == NULL) /* should not happen */
+			continue;
+
+		spin_lock_irqsave(&port->lock, flags);
+
+		portmux_setup(port, gpio_to_offset(port, gpio),
+				 P_FUNCT2MUX(*mux));
+		port_setup(port, gpio_to_offset(port, gpio), PERIPHERAL_USAGE);
+		mux++;
+
+		spin_unlock_irqrestore(&port->lock, flags);
+	}
+
+	return 0;
+}
+
+static void adi_pinmux_disable(struct pinctrl_dev *pctldev, unsigned selector,
+	unsigned group)
+{
+	struct adi_pmx *pmx;
+	struct gpio_port *port;
+	unsigned long flags;
+	unsigned short *mux = (unsigned short *)adi_pmx_functions[selector].mux;
+	unsigned short gpio;
+
+	pmx = pinctrl_dev_get_drvdata(pctldev);
+
+	while (*mux) {
+		gpio = P_IDENT(*mux);
+
+		port = find_gpio_port(gpio - pmx->gpio_base, &pmx->gpio_list);
+		if (port == NULL) /* should not happen */
+			continue;
+
+		spin_lock_irqsave(&port->lock, flags);
+
+		port_setup(port, gpio_to_offset(port, gpio), GPIO_USAGE);
+		mux++;
+
+		spin_unlock_irqrestore(&port->lock, flags);
+	}
+}
+
+static int adi_pinmux_get_funcs_count(struct pinctrl_dev *pctldev)
+{
+	return ARRAY_SIZE(adi_pmx_functions);
+}
+
+static const char *adi_pinmux_get_func_name(struct pinctrl_dev *pctldev,
+					  unsigned selector)
+{
+	return adi_pmx_functions[selector].name;
+}
+
+static int adi_pinmux_get_groups(struct pinctrl_dev *pctldev, unsigned selector,
+			       const char * const **groups,
+			       unsigned * const num_groups)
+{
+	*groups = adi_pmx_functions[selector].groups;
+	*num_groups = adi_pmx_functions[selector].num_groups;
+	return 0;
+}
+
+static int adi_pinmux_request_gpio(struct pinctrl_dev *pctldev,
+	struct pinctrl_gpio_range *range, unsigned pin)
+{
+	struct adi_pmx *pmx;
+	struct gpio_port *port;
+	unsigned long flags;
+	u8 offset;
+
+	pmx = pinctrl_dev_get_drvdata(pctldev);
+	port = find_gpio_port(pin, &pmx->gpio_list);
+	if (port == NULL) {
+		dev_err(pctldev->dev,
+		       "%s: GPIO PIN %d doesn't exist!\n",
+		       __func__, pin);
+		return -ENODEV;
+	}
+
+	offset = pin_to_offset(&port->range, pin);
+
+	spin_lock_irqsave(&port->lock, flags);
+
+	if (unlikely(is_reserved(port, RSV_GPIO, offset))) {
+		if (system_state == SYSTEM_BOOTING)
+			dump_stack();
+		dev_err(pctldev->dev,
+			"GPIO %d is already reserved by %s !\n",
+			offset_to_gpio(port, offset), get_label(port, offset));
+		spin_unlock_irqrestore(&port->lock, flags);
+		return -EBUSY;
+	}
+	if (unlikely(is_reserved(port, RSV_PERI, offset))) {
+		if (system_state == SYSTEM_BOOTING)
+			dump_stack();
+		dev_err(pctldev->dev,
+			"GPIO %d is already reserved as peripheral by %s !\n",
+			offset_to_gpio(port, offset), get_label(port, offset));
+		spin_unlock_irqrestore(&port->lock, flags);
+		return -EBUSY;
+	}
+	if (unlikely(is_reserved(port, RSV_INT, offset))) {
+		dev_err(pctldev->dev,
+			"GPIO %d is already reserved as gpio-irq!\n",
+			offset_to_gpio(port, offset));
+	}
+
+	reserve(port, RSV_GPIO, offset);
+	set_label(port, offset, port->chip.label);
+	port_setup(port, offset, GPIO_USAGE);
+
+	spin_unlock_irqrestore(&port->lock, flags);
+
+	return 0;
+}
+
+static void adi_pinmux_free_gpio(struct pinctrl_dev *pctldev,
+	struct pinctrl_gpio_range *range, unsigned pin)
+{
+	struct adi_pmx *pmx;
+	struct gpio_port *port;
+	unsigned long flags;
+	u8 offset;
+
+	pmx = pinctrl_dev_get_drvdata(pctldev);
+	port = find_gpio_port(pin, &pmx->gpio_list);
+	if (port == NULL)
+		return;
+
+	offset = pin_to_offset(&port->range, pin);
+
+	spin_lock_irqsave(&port->lock, flags);
+
+	if (unlikely(!is_reserved(port, RSV_GPIO, offset))) {
+		if (system_state == SYSTEM_BOOTING)
+			dump_stack();
+
+		dev_err(pctldev->dev,
+			"GPIO %d wasn't requested!\n",
+			offset_to_gpio(port, offset));
+		spin_unlock_irqrestore(&port->lock, flags);
+		return;
+	}
+
+	unreserve(port, RSV_GPIO, offset);
+	set_label(port, offset, "free");
+
+	spin_unlock_irqrestore(&port->lock, flags);
+
+	return;
+}
+
+static struct pinmux_ops adi_pinmux_ops = {
+	.request = adi_pinmux_request,
+	.free = adi_pinmux_free,
+	.enable = adi_pinmux_enable,
+	.disable = adi_pinmux_disable,
+	.get_functions_count = adi_pinmux_get_funcs_count,
+	.get_function_name = adi_pinmux_get_func_name,
+	.get_function_groups = adi_pinmux_get_groups,
+	.gpio_request_enable = adi_pinmux_request_gpio,
+	.gpio_disable_free = adi_pinmux_free_gpio,
+};
+
+
+static struct pinctrl_desc adi_pinmux_desc = {
+	.name = DRIVER_NAME,
+	.pins = adi_pads,
+	.npins = ARRAY_SIZE(adi_pads),
+	.pctlops = &adi_pctrl_ops,
+	.pmxops = &adi_pinmux_ops,
+	.owner = THIS_MODULE,
+};
+
+static int adi_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+	struct gpio_port *port;
+
+	port = container_of(chip, struct gpio_port, chip);
+
+	return pinctrl_request_gpio(offset_to_gpio(port, offset));
+}
+
+static void adi_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+	struct gpio_port *port;
+
+	port = container_of(chip, struct gpio_port, chip);
+
+	pinctrl_free_gpio(offset_to_gpio(port, offset));
+}
+
+static int adi_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+	struct gpio_port *port;
+	unsigned long flags;
+
+	port = container_of(chip, struct gpio_port, chip);
+
+	spin_lock_irqsave(&port->lock, flags);
+
+	if (unlikely(!is_reserved(port, RSV_GPIO, offset))) {
+		dev_err(port->dev, "GPIO %d wasn't requested!\n",
+			offset_to_gpio(port, offset));
+		spin_unlock_irqrestore(&port->lock, flags);
+		return -EINVAL;
+	}
+
+	writew(1 << offset, &port->regs->dir_clear);
+	writew(readw(&port->regs->inen) | (1 << offset), &port->regs->inen);
+
+	spin_unlock_irqrestore(&port->lock, flags);
+
+	return 0;
+}
+
+static void adi_gpio_set_value(struct gpio_chip *chip, unsigned offset,
+	int value)
+{
+	struct gpio_port *port = container_of(chip, struct gpio_port, chip);
+	struct gpio_port_t *regs = port->regs;
+	unsigned long flags;
+
+	spin_lock_irqsave(&port->lock, flags);
+
+	if (value)
+		writew(1 << offset, &regs->data_set);
+	else
+		writew(1 << offset, &regs->data_clear);
+
+	spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static int adi_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
+	int value)
+{
+	struct gpio_port *port = container_of(chip, struct gpio_port, chip);
+	struct gpio_port_t *regs = port->regs;
+	unsigned long flags;
+
+	spin_lock_irqsave(&port->lock, flags);
+
+	if (unlikely(!is_reserved(port, RSV_GPIO, offset))) {
+		dev_err(port->dev, "GPIO %d wasn't requested!\n",
+			offset_to_gpio(port, offset));
+		spin_unlock_irqrestore(&port->lock, flags);
+		return -EINVAL;
+	}
+
+	writew(readw(&regs->inen) & ~(1 << offset), &regs->inen);
+	adi_gpio_set_value(chip, offset, value);
+	writew(1 << offset, &regs->dir_set);
+
+	spin_unlock_irqrestore(&port->lock, flags);
+
+	return 0;
+}
+
+static int adi_gpio_get_value(struct gpio_chip *chip, unsigned offset)
+{
+	struct gpio_port *port = container_of(chip, struct gpio_port, chip);
+	struct gpio_port_t *regs = port->regs;
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&port->lock, flags);
+
+	ret = 1 & (readw(&regs->data) >> offset);
+
+	spin_unlock_irqrestore(&port->lock, flags);
+
+	return ret;
+}
+
+static int adi_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+	struct gpio_port *port = container_of(chip, struct gpio_port, chip);
+
+	if (port->irq_base >= 0)
+		return irq_find_mapping(port->domain, offset);
+	else
+		return irq_create_mapping(port->domain, offset);
+}
+
+#if defined(CONFIG_PROC_FS)
+static inline unsigned short get_gpio_dir(struct gpio_port *port,
+	unsigned offset)
+{
+	struct gpio_port_t *regs = port->regs;
+
+	return 1 & (readw(&regs->dir_clear) >> offset);
+}
+
+static int gpio_proc_show(struct seq_file *m, void *v)
+{
+	int offset, irq, gpio;
+	struct adi_pmx *pmx;
+	struct gpio_port *port;
+
+	list_for_each_entry(pmx, &adi_pinctrl_list, node)
+	list_for_each_entry(port, &pmx->gpio_list, node)
+		for (offset = 0; offset < port->width; offset++) {
+			irq = is_reserved(port, RSV_INT, offset);
+			gpio = is_reserved(port, RSV_GPIO, offset);
+			if (gpio || irq)
+				seq_printf(m, "GPIO_%d: \t%s%s \t\tGPIO %s\n",
+					offset_to_gpio(port, offset),
+					get_label(port, offset),
+					(gpio && irq) ? " *" : "",
+					get_gpio_dir(port, offset) ?
+					"OUTPUT" : "INPUT");
+			else if (is_reserved(port, RSV_PERI, offset))
+				seq_printf(m, "GPIO_%d: \t%s \t\tPeripheral\n",
+					offset_to_gpio(port, offset),
+					get_label(port, offset));
+			else
+				continue;
+		}
+
+	return 0;
+}
+
+static int gpio_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, gpio_proc_show, NULL);
+}
+
+static const struct file_operations gpio_proc_ops = {
+	.open		= gpio_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static __init int gpio_register_proc(void)
+{
+	struct proc_dir_entry *proc_gpio;
+
+	proc_gpio = proc_create("gpio", 0, NULL, &gpio_proc_ops);
+	return proc_gpio == NULL;
+}
+device_initcall(gpio_register_proc);
+#endif
+
+static int adi_pint_map_port(struct gpio_pint *pint, u8 assign, u8 map,
+	struct irq_domain *domain)
+{
+	struct gpio_pint_regs *regs = pint->regs;
+
+	if (pint->map_count > 1)
+		return -EINVAL;
+
+	if (assign > 1)
+		return -EINVAL;
+
+	pint->map_count++;
+
+	writel((readl(&regs->assign) & (0xFFFF << !assign * PINT_HI_OFFSET)) |
+		(((map << 8) | map) << assign * PINT_HI_OFFSET), &regs->assign);
+
+	pint->domain[assign] = domain;
+
+	return 0;
+}
+
+static int adi_gpio_pint_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	struct gpio_pint *pint;
+
+	pint = devm_kzalloc(dev, sizeof(struct gpio_pint), GFP_KERNEL);
+	if (!pint) {
+		dev_err(dev, "Memory alloc failed\n");
+		return -ENOMEM;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (unlikely(!res)) {
+		dev_err(dev, "Invalid mem resource\n");
+		return -ENODEV;
+	}
+
+	if (!devm_request_mem_region(dev, res->start, resource_size(res),
+				     pdev->name)) {
+		dev_err(dev, "Region already claimed\n");
+		return -EBUSY;
+	}
+
+	pint->base = devm_ioremap(dev, res->start, resource_size(res));
+	if (!pint->base) {
+		dev_err(dev, "Could not ioremap\n");
+		return -ENOMEM;
+	}
+
+	pint->regs = (struct gpio_pint_regs *)pint->base;
+
+	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (unlikely(!res)) {
+		dev_err(dev, "Invalid IRQ resource\n");
+		return -ENODEV;
+	}
+
+	spin_lock_init(&pint->lock);
+
+	pint->irq = res->start;
+	pint->pint_map_port = adi_pint_map_port;
+	platform_set_drvdata(pdev, pint);
+
+	irq_set_chained_handler(pint->irq, adi_gpio_handle_pint_irq);
+	irq_set_handler_data(pint->irq, pint);
+
+	list_add_tail(&pint->node, &adi_pint_list);
+
+	return 0;
+}
+
+static int adi_gpio_pint_remove(struct platform_device *pdev)
+{
+	struct gpio_pint *pint = platform_get_drvdata(pdev);
+
+	list_del(&pint->node);
+	irq_set_handler(pint->irq, handle_simple_irq);
+	platform_set_drvdata(pdev, NULL);
+
+	return 0;
+}
+
+static int adi_gpio_irq_map(struct irq_domain *d, unsigned int irq,
+				irq_hw_number_t hwirq)
+{
+	struct gpio_port *port = d->host_data;
+
+	if (!port)
+		return -EINVAL;
+
+	irq_set_chip_data(irq, port);
+	irq_set_chip_and_handler(irq, &adi_gpio_irqchip,
+				handle_level_irq);
+
+	return 0;
+}
+
+const struct irq_domain_ops adi_gpio_irq_domain_ops = {
+	.map = adi_gpio_irq_map,
+	.xlate = irq_domain_xlate_onecell,
+};
+
+static int adi_gpio_init_int(struct gpio_port *port)
+{
+	struct device_node *node = port->dev->of_node;
+	struct gpio_pint *pint = port->pint;
+	int ret;
+
+	port->domain = irq_domain_add_linear(node, port->width,
+				&adi_gpio_irq_domain_ops, port);
+	if (!port->domain) {
+		dev_err(port->dev, "Failed to create irqdomain\n");
+		return -ENOSYS;
+	}
+
+	ret = pint->pint_map_port(port->pint, port->pint_assign,
+			port->pint_map,	port->domain);
+	if (ret)
+		return ret;
+
+	if (port->irq_base >= 0) {
+		ret = irq_create_strict_mappings(port->domain, port->irq_base,
+					0, port->width);
+		if (ret) {
+			dev_err(port->dev, "Couldn't associate to domain\n");
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int adi_gpio_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	const struct adi_pinctrl_gpio_platform_data *pdata;
+	struct resource *res;
+	struct gpio_port *port;
+	static int gpio;
+	int ret = 0;
+
+	pdata = dev->platform_data;
+	if (!pdata)
+		return -EINVAL;
+
+	port = devm_kzalloc(dev, sizeof(struct gpio_port) +
+		sizeof(struct gpio_reserve_map) * pdata->port_width,
+		GFP_KERNEL);
+	if (!port) {
+		dev_err(dev, "Memory alloc failed\n");
+		return -ENOMEM;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (unlikely(!res)) {
+		dev_err(dev, "Invalid mem resource\n");
+		return -ENODEV;
+	}
+
+	if (!devm_request_mem_region(dev, res->start, resource_size(res),
+				     pdev->name)) {
+		dev_err(dev, "Region already claimed\n");
+		return -EBUSY;
+	}
+
+	port->base = devm_ioremap(dev, res->start, resource_size(res));
+	if (!port->base) {
+		dev_err(dev, "Could not ioremap\n");
+		return -ENOMEM;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (unlikely(!res))
+		port->irq_base = -1;
+	else
+		port->irq_base = res->start;
+
+	port->width = pdata->port_width;
+	port->dev = dev;
+	port->regs = (struct gpio_port_t *)port->base;
+	port->pint_assign = !!pdata->pint_assign;
+	port->pint_map = pdata->pint_map;
+
+	port->pint = find_gpio_pint(pdata->pint_id);
+	if (port->pint) {
+		ret = adi_gpio_init_int(port);
+		if (ret)
+			return ret;
+	}
+
+	port->pmx = find_pinctrl(pdata->pinctrl_id);
+	if (port->pmx == NULL) {
+		dev_err(dev, "Could not find pinctrl device\n");
+		return -ENODEV;
+	}
+	if (gpio == 0)
+		gpio = port->pmx->gpio_base;
+
+	spin_lock_init(&port->lock);
+
+	platform_set_drvdata(pdev, port);
+
+	port->chip.label		= "adi-gpio";
+	port->chip.direction_input	= adi_gpio_direction_input;
+	port->chip.get			= adi_gpio_get_value;
+	port->chip.direction_output	= adi_gpio_direction_output;
+	port->chip.set			= adi_gpio_set_value;
+	port->chip.request		= adi_gpio_request;
+	port->chip.free			= adi_gpio_free;
+	port->chip.to_irq		= adi_gpio_to_irq;
+	if (pdata->port_pin_base > 0)
+		port->chip.base		= pdata->port_pin_base +
+						port->pmx->gpio_base;
+	else
+		port->chip.base		= gpio;
+	port->chip.ngpio		= port->width;
+	gpio = port->chip.base + port->width;
+
+	ret = gpiochip_add(&port->chip);
+	if (ret)
+		return ret;
+
+	/* Set gpio range to pinctrl driver */
+	port->range.name = port->chip.label;
+	port->range.id = pdev->id;
+	port->range.base = port->chip.base;
+	port->range.pin_base = port->chip.base - port->pmx->gpio_base;
+	port->range.npins = port->width;
+	port->range.gc = &port->chip;
+	pinctrl_add_gpio_range(port->pmx->pctl, &port->range);
+
+	list_add_tail(&port->node, &port->pmx->gpio_list);
+
+	return 0;
+}
+
+static int adi_gpio_remove(struct platform_device *pdev)
+{
+	struct gpio_port *port = platform_get_drvdata(pdev);
+	int ret;
+	u8 offset;
+
+	for (offset = 0; offset < port->width; offset++)
+		irq_dispose_mapping(irq_find_mapping(port->domain, offset));
+
+	irq_domain_remove(port->domain);
+	pinctrl_remove_gpio_range(port->pmx->pctl, &port->range);
+	list_del(&port->node);
+	ret = gpiochip_remove(&port->chip);
+	platform_set_drvdata(pdev, NULL);
+
+	return ret;
+}
+
+static int adi_pinctrl_probe(struct platform_device *pdev)
+{
+	struct adi_pmx *pmx;
+	struct resource *res;
+
+	pmx = devm_kzalloc(&pdev->dev, sizeof(*pmx), GFP_KERNEL);
+	if (!pmx)
+		return -ENOMEM;
+
+	pmx->dev = &pdev->dev;
+
+	/* Now register the pin controller and all pins it handles */
+	pmx->pctl = pinctrl_register(&adi_pinmux_desc, &pdev->dev, pmx);
+	if (!pmx->pctl) {
+		dev_err(&pdev->dev, "could not register pinctrl ADI2 driver\n");
+		return -EINVAL;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+	if (res)
+		pmx->gpio_base = res->start;
+
+	INIT_LIST_HEAD(&pmx->gpio_list);
+
+	list_add_tail(&pmx->node, &adi_pinctrl_list);
+
+	return 0;
+}
+
+static int adi_pinctrl_remove(struct platform_device *pdev)
+{
+	struct adi_pmx *pmx = platform_get_drvdata(pdev);
+
+	list_del(&pmx->node);
+	pinctrl_unregister(pmx->pctl);
+	platform_set_drvdata(pdev, NULL);
+
+	return 0;
+}
+
+static struct platform_driver adi_pinctrl_driver = {
+	.probe		= adi_pinctrl_probe,
+	.remove		= adi_pinctrl_remove,
+	.driver		= {
+		.name	= DRIVER_NAME,
+	},
+};
+
+static struct platform_driver adi_gpio_pint_driver = {
+	.probe		= adi_gpio_pint_probe,
+	.remove		= adi_gpio_pint_remove,
+	.driver		= {
+		.name	= "adi-gpio-pint",
+	},
+};
+
+static struct platform_driver adi_gpio_driver = {
+	.probe		= adi_gpio_probe,
+	.remove		= adi_gpio_remove,
+	.driver		= {
+		.name	= "adi-gpio",
+	},
+};
+
+static int __init adi_pinctrl_setup(void)
+{
+	int ret;
+
+	ret = platform_driver_register(&adi_pinctrl_driver);
+	if (ret)
+		return ret;
+
+	ret = platform_driver_register(&adi_gpio_pint_driver);
+	if (ret)
+		goto pint_error;
+
+	ret = platform_driver_register(&adi_gpio_driver);
+	if (ret)
+		goto gpio_error;
+
+#ifdef CONFIG_PM
+	register_syscore_ops(&gpio_pm_syscore_ops);
+#endif
+	return ret;
+gpio_error:
+	platform_driver_unregister(&adi_gpio_pint_driver);
+pint_error:
+	platform_driver_unregister(&adi_pinctrl_driver);
+
+	return ret;
+}
+postcore_initcall(adi_pinctrl_setup);
+
+MODULE_AUTHOR("Sonic Zhang <sonic.zhang@...log.com>");
+MODULE_DESCRIPTION("ADI gpio2 pin control driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/platform_data/pinctrl-adi2.h b/include/linux/platform_data/pinctrl-adi2.h
new file mode 100644
index 0000000..465578e
--- /dev/null
+++ b/include/linux/platform_data/pinctrl-adi2.h
@@ -0,0 +1,38 @@
+/*
+ * Pinctrl Driver for ADI GPIO2 controller
+ *
+ * Copyright 2007-2013 Analog Devices Inc.
+ *
+ * Licensed under the GPLv2 or later
+ */
+
+
+#ifndef PINCTRL_ADI2_H
+#define PINCTRL_ADI2_H
+
+#include <linux/io.h>
+#include <linux/platform_device.h>
+
+/**
+ * struct adi_pinctrl_gpio_platform_data - Pinctrl gpio platform data
+ * for ADI GPIO2 device.
+ *
+ * @port_pin_base: Optional global GPIO index of the GPIO bank.
+ *                 0 means driver decides.
+ * @port_width: PIN number of the GPIO bank device
+ * @pint_id: GPIO PINT device id that this GPIO bank should map to.
+ * @pint_assign: The 32-bit GPIO PINT registers can be divided into 2 parts. A
+ *               GPIO bank can be mapped into either low 16 bits[0] or high 16
+ *               bits[1] of each PINT register.
+ * @pint_map: GIOP bank mapping code in PINT device
+ */
+struct adi_pinctrl_gpio_platform_data {
+	unsigned int port_pin_base;
+	unsigned int port_width;
+	u8 pinctrl_id;
+	u8 pint_id;
+	u8 pint_assign;
+	u8 pint_map;
+};
+
+#endif
-- 
1.8.2.3


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