drivers/pinctrl/pinctrl-exynos.c - maze/linux - Git at Google

 /*
  * Exynos specific support for Samsung pinctrl/gpiolib driver with eint support.
  *
  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  * Copyright (c) 2012 Linaro Ltd
  *		http://www.linaro.org
  *
  * Author: Thomas Abraham <thomas.ab@samsung.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 file contains the Samsung Exynos specific information required by the
  * the Samsung pinctrl/gpiolib driver. It also includes the implementation of
  * external gpio and wakeup interrupt support.
  */

 #include <linux/module.h>
 #include <linux/device.h>
 #include <linux/interrupt.h>
 #include <linux/irqdomain.h>
 #include <linux/irq.h>
 #include <linux/of_irq.h>
 #include <linux/io.h>
 #include <linux/slab.h>
 #include <linux/err.h>

 #include <asm/mach/irq.h>

 #include "pinctrl-samsung.h"
 #include "pinctrl-exynos.h"

 /* list of external wakeup controllers supported */
 static const struct of_device_id exynos_wkup_irq_ids[] = {
 	{ .compatible = "samsung,exynos4210-wakeup-eint", },
 };

 static void exynos_gpio_irq_unmask(struct irq_data *irqd)
 {
 	struct samsung_pinctrl_drv_data *d = irqd->domain->host_data;
 	struct exynos_geint_data *edata = irq_data_get_irq_handler_data(irqd);
 	unsigned long reg_mask = d->ctrl->geint_mask + edata->eint_offset;
 	unsigned long mask;

 	mask = readl(d->virt_base + reg_mask);
 	mask &= ~(1 << edata->pin);
 	writel(mask, d->virt_base + reg_mask);
 }

 static void exynos_gpio_irq_mask(struct irq_data *irqd)
 {
 	struct samsung_pinctrl_drv_data *d = irqd->domain->host_data;
 	struct exynos_geint_data *edata = irq_data_get_irq_handler_data(irqd);
 	unsigned long reg_mask = d->ctrl->geint_mask + edata->eint_offset;
 	unsigned long mask;

 	mask = readl(d->virt_base + reg_mask);
 	mask |= 1 << edata->pin;
 	writel(mask, d->virt_base + reg_mask);
 }

 static void exynos_gpio_irq_ack(struct irq_data *irqd)
 {
 	struct samsung_pinctrl_drv_data *d = irqd->domain->host_data;
 	struct exynos_geint_data *edata = irq_data_get_irq_handler_data(irqd);
 	unsigned long reg_pend = d->ctrl->geint_pend + edata->eint_offset;

 	writel(1 << edata->pin, d->virt_base + reg_pend);
 }

 static int exynos_gpio_irq_set_type(struct irq_data *irqd, unsigned int type)
 {
 	struct samsung_pinctrl_drv_data *d = irqd->domain->host_data;
 	struct samsung_pin_ctrl *ctrl = d->ctrl;
 	struct exynos_geint_data *edata = irq_data_get_irq_handler_data(irqd);
 	struct samsung_pin_bank *bank = edata->bank;
 	unsigned int shift = EXYNOS_EINT_CON_LEN * edata->pin;
 	unsigned int con, trig_type;
 	unsigned long reg_con = ctrl->geint_con + edata->eint_offset;
 	unsigned int mask;

 	switch (type) {
 	case IRQ_TYPE_EDGE_RISING:
 		trig_type = EXYNOS_EINT_EDGE_RISING;
 		break;
 	case IRQ_TYPE_EDGE_FALLING:
 		trig_type = EXYNOS_EINT_EDGE_FALLING;
 		break;
 	case IRQ_TYPE_EDGE_BOTH:
 		trig_type = EXYNOS_EINT_EDGE_BOTH;
 		break;
 	case IRQ_TYPE_LEVEL_HIGH:
 		trig_type = EXYNOS_EINT_LEVEL_HIGH;
 		break;
 	case IRQ_TYPE_LEVEL_LOW:
 		trig_type = EXYNOS_EINT_LEVEL_LOW;
 		break;
 	default:
 		pr_err("unsupported external interrupt type\n");
 		return -EINVAL;
 	}

 	if (type & IRQ_TYPE_EDGE_BOTH)
 		__irq_set_handler_locked(irqd->irq, handle_edge_irq);
 	else
 		__irq_set_handler_locked(irqd->irq, handle_level_irq);

 	con = readl(d->virt_base + reg_con);
 	con &= ~(EXYNOS_EINT_CON_MASK << shift);
 	con |= trig_type << shift;
 	writel(con, d->virt_base + reg_con);

 	reg_con = bank->pctl_offset;
 	shift = edata->pin * bank->func_width;
 	mask = (1 << bank->func_width) - 1;

 	con = readl(d->virt_base + reg_con);
 	con &= ~(mask << shift);
 	con |= EXYNOS_EINT_FUNC << shift;
 	writel(con, d->virt_base + reg_con);

 	return 0;
 }

 /*
  * irq_chip for gpio interrupts.
  */
 static struct irq_chip exynos_gpio_irq_chip = {
 	.name		= "exynos_gpio_irq_chip",
 	.irq_unmask	= exynos_gpio_irq_unmask,
 	.irq_mask	= exynos_gpio_irq_mask,
 	.irq_ack		= exynos_gpio_irq_ack,
 	.irq_set_type	= exynos_gpio_irq_set_type,
 };

 /*
  * given a controller-local external gpio interrupt number, prepare the handler
  * data for it.
  */
 static struct exynos_geint_data *exynos_get_eint_data(irq_hw_number_t hw,
 				struct samsung_pinctrl_drv_data *d)
 {
 	struct samsung_pin_bank *bank = d->ctrl->pin_banks;
 	struct exynos_geint_data *eint_data;
 	unsigned int nr_banks = d->ctrl->nr_banks, idx;
 	unsigned int irq_base = 0, eint_offset = 0;

 	if (hw >= d->ctrl->nr_gint) {
 		dev_err(d->dev, "unsupported ext-gpio interrupt\n");
 		return NULL;
 	}

 	for (idx = 0; idx < nr_banks; idx++, bank++) {
 		if (bank->eint_type != EINT_TYPE_GPIO)
 			continue;
 		if ((hw >= irq_base) && (hw < (irq_base + bank->nr_pins)))
 			break;
 		irq_base += bank->nr_pins;
 		eint_offset += 4;
 	}

 	if (idx == nr_banks) {
 		dev_err(d->dev, "pin bank not found for ext-gpio interrupt\n");
 		return NULL;
 	}

 	eint_data = devm_kzalloc(d->dev, sizeof(*eint_data), GFP_KERNEL);
 	if (!eint_data) {
 		dev_err(d->dev, "no memory for eint-gpio data\n");
 		return NULL;
 	}

 	eint_data->bank	= bank;
 	eint_data->pin = hw - irq_base;
 	eint_data->eint_offset = eint_offset;
 	return eint_data;
 }

 static int exynos_gpio_irq_map(struct irq_domain *h, unsigned int virq,
 					irq_hw_number_t hw)
 {
 	struct samsung_pinctrl_drv_data *d = h->host_data;
 	struct exynos_geint_data *eint_data;

 	eint_data = exynos_get_eint_data(hw, d);
 	if (!eint_data)
 		return -EINVAL;

 	irq_set_handler_data(virq, eint_data);
 	irq_set_chip_data(virq, h->host_data);
 	irq_set_chip_and_handler(virq, &exynos_gpio_irq_chip,
 					handle_level_irq);
 	set_irq_flags(virq, IRQF_VALID);
 	return 0;
 }

 static void exynos_gpio_irq_unmap(struct irq_domain *h, unsigned int virq)
 {
 	struct samsung_pinctrl_drv_data *d = h->host_data;
 	struct exynos_geint_data *eint_data;

 	eint_data = irq_get_handler_data(virq);
 	devm_kfree(d->dev, eint_data);
 }

 /*
  * irq domain callbacks for external gpio interrupt controller.
  */
 static const struct irq_domain_ops exynos_gpio_irqd_ops = {
 	.map	= exynos_gpio_irq_map,
 	.unmap	= exynos_gpio_irq_unmap,
 	.xlate	= irq_domain_xlate_twocell,
 };

 static irqreturn_t exynos_eint_gpio_irq(int irq, void *data)
 {
 	struct samsung_pinctrl_drv_data *d = data;
 	struct samsung_pin_ctrl *ctrl = d->ctrl;
 	struct samsung_pin_bank *bank = ctrl->pin_banks;
 	unsigned int svc, group, pin, virq;

 	svc = readl(d->virt_base + ctrl->svc);
 	group = EXYNOS_SVC_GROUP(svc);
 	pin = svc & EXYNOS_SVC_NUM_MASK;

 	if (!group)
 		return IRQ_HANDLED;
 	bank += (group - 1);

 	virq = irq_linear_revmap(d->gpio_irqd, bank->irq_base + pin);
 	if (!virq)
 		return IRQ_NONE;
 	generic_handle_irq(virq);
 	return IRQ_HANDLED;
 }

 /*
  * exynos_eint_gpio_init() - setup handling of external gpio interrupts.
  * @d: driver data of samsung pinctrl driver.
  */
 static int exynos_eint_gpio_init(struct samsung_pinctrl_drv_data *d)
 {
 	struct device *dev = d->dev;
 	unsigned int ret;

 	if (!d->irq) {
 		dev_err(dev, "irq number not available\n");
 		return -EINVAL;
 	}

 	ret = devm_request_irq(dev, d->irq, exynos_eint_gpio_irq,
 					0, dev_name(dev), d);
 	if (ret) {
 		dev_err(dev, "irq request failed\n");
 		return -ENXIO;
 	}

 	d->gpio_irqd = irq_domain_add_linear(dev->of_node, d->ctrl->nr_gint,
 				&exynos_gpio_irqd_ops, d);
 	if (!d->gpio_irqd) {
 		dev_err(dev, "gpio irq domain allocation failed\n");
 		return -ENXIO;
 	}

 	return 0;
 }

 static void exynos_wkup_irq_unmask(struct irq_data *irqd)
 {
 	struct samsung_pinctrl_drv_data *d = irq_data_get_irq_chip_data(irqd);
 	unsigned int bank = irqd->hwirq / EXYNOS_EINT_MAX_PER_BANK;
 	unsigned int pin = irqd->hwirq & (EXYNOS_EINT_MAX_PER_BANK - 1);
 	unsigned long reg_mask = d->ctrl->weint_mask + (bank << 2);
 	unsigned long mask;

 	mask = readl(d->virt_base + reg_mask);
 	mask &= ~(1 << pin);
 	writel(mask, d->virt_base + reg_mask);
 }

 static void exynos_wkup_irq_mask(struct irq_data *irqd)
 {
 	struct samsung_pinctrl_drv_data *d = irq_data_get_irq_chip_data(irqd);
 	unsigned int bank = irqd->hwirq / EXYNOS_EINT_MAX_PER_BANK;
 	unsigned int pin = irqd->hwirq & (EXYNOS_EINT_MAX_PER_BANK - 1);
 	unsigned long reg_mask = d->ctrl->weint_mask + (bank << 2);
 	unsigned long mask;

 	mask = readl(d->virt_base + reg_mask);
 	mask |= 1 << pin;
 	writel(mask, d->virt_base + reg_mask);
 }

 static void exynos_wkup_irq_ack(struct irq_data *irqd)
 {
 	struct samsung_pinctrl_drv_data *d = irq_data_get_irq_chip_data(irqd);
 	unsigned int bank = irqd->hwirq / EXYNOS_EINT_MAX_PER_BANK;
 	unsigned int pin = irqd->hwirq & (EXYNOS_EINT_MAX_PER_BANK - 1);
 	unsigned long pend = d->ctrl->weint_pend + (bank << 2);

 	writel(1 << pin, d->virt_base + pend);
 }

 static int exynos_wkup_irq_set_type(struct irq_data *irqd, unsigned int type)
 {
 	struct samsung_pinctrl_drv_data *d = irq_data_get_irq_chip_data(irqd);
 	unsigned int bank = irqd->hwirq / EXYNOS_EINT_MAX_PER_BANK;
 	unsigned int pin = irqd->hwirq & (EXYNOS_EINT_MAX_PER_BANK - 1);
 	unsigned long reg_con = d->ctrl->weint_con + (bank << 2);
 	unsigned long shift = EXYNOS_EINT_CON_LEN * pin;
 	unsigned long con, trig_type;

 	switch (type) {
 	case IRQ_TYPE_EDGE_RISING:
 		trig_type = EXYNOS_EINT_EDGE_RISING;
 		break;
 	case IRQ_TYPE_EDGE_FALLING:
 		trig_type = EXYNOS_EINT_EDGE_FALLING;
 		break;
 	case IRQ_TYPE_EDGE_BOTH:
 		trig_type = EXYNOS_EINT_EDGE_BOTH;
 		break;
 	case IRQ_TYPE_LEVEL_HIGH:
 		trig_type = EXYNOS_EINT_LEVEL_HIGH;
 		break;
 	case IRQ_TYPE_LEVEL_LOW:
 		trig_type = EXYNOS_EINT_LEVEL_LOW;
 		break;
 	default:
 		pr_err("unsupported external interrupt type\n");
 		return -EINVAL;
 	}

 	if (type & IRQ_TYPE_EDGE_BOTH)
 		__irq_set_handler_locked(irqd->irq, handle_edge_irq);
 	else
 		__irq_set_handler_locked(irqd->irq, handle_level_irq);

 	con = readl(d->virt_base + reg_con);
 	con &= ~(EXYNOS_EINT_CON_MASK << shift);
 	con |= trig_type << shift;
 	writel(con, d->virt_base + reg_con);
 	return 0;
 }

 /*
  * irq_chip for wakeup interrupts
  */
 static struct irq_chip exynos_wkup_irq_chip = {
 	.name	= "exynos_wkup_irq_chip",
 	.irq_unmask	= exynos_wkup_irq_unmask,
 	.irq_mask	= exynos_wkup_irq_mask,
 	.irq_ack	= exynos_wkup_irq_ack,
 	.irq_set_type	= exynos_wkup_irq_set_type,
 };

 /* interrupt handler for wakeup interrupts 0..15 */
 static void exynos_irq_eint0_15(unsigned int irq, struct irq_desc *desc)
 {
 	struct exynos_weint_data *eintd = irq_get_handler_data(irq);
 	struct irq_chip *chip = irq_get_chip(irq);
 	int eint_irq;

 	chained_irq_enter(chip, desc);
 	chip->irq_mask(&desc->irq_data);

 	if (chip->irq_ack)
 		chip->irq_ack(&desc->irq_data);

 	eint_irq = irq_linear_revmap(eintd->domain, eintd->irq);
 	generic_handle_irq(eint_irq);
 	chip->irq_unmask(&desc->irq_data);
 	chained_irq_exit(chip, desc);
 }

 static inline void exynos_irq_demux_eint(int irq_base, unsigned long pend,
 					struct irq_domain *domain)
 {
 	unsigned int irq;

 	while (pend) {
 		irq = fls(pend) - 1;
 		generic_handle_irq(irq_find_mapping(domain, irq_base + irq));
 		pend &= ~(1 << irq);
 	}
 }

 /* interrupt handler for wakeup interrupt 16 */
 static void exynos_irq_demux_eint16_31(unsigned int irq, struct irq_desc *desc)
 {
 	struct irq_chip *chip = irq_get_chip(irq);
 	struct exynos_weint_data *eintd = irq_get_handler_data(irq);
 	struct samsung_pinctrl_drv_data *d = eintd->domain->host_data;
 	unsigned long pend;
 	unsigned long mask;

 	chained_irq_enter(chip, desc);
 	pend = readl(d->virt_base + d->ctrl->weint_pend + 0x8);
 	mask = readl(d->virt_base + d->ctrl->weint_mask + 0x8);
 	exynos_irq_demux_eint(16, pend & ~mask, eintd->domain);
 	pend = readl(d->virt_base + d->ctrl->weint_pend + 0xC);
 	mask = readl(d->virt_base + d->ctrl->weint_mask + 0xC);
 	exynos_irq_demux_eint(24, pend & ~mask, eintd->domain);
 	chained_irq_exit(chip, desc);
 }

 static int exynos_wkup_irq_map(struct irq_domain *h, unsigned int virq,
 					irq_hw_number_t hw)
 {
 	irq_set_chip_and_handler(virq, &exynos_wkup_irq_chip, handle_level_irq);
 	irq_set_chip_data(virq, h->host_data);
 	set_irq_flags(virq, IRQF_VALID);
 	return 0;
 }

 /*
  * irq domain callbacks for external wakeup interrupt controller.
  */
 static const struct irq_domain_ops exynos_wkup_irqd_ops = {
 	.map	= exynos_wkup_irq_map,
 	.xlate	= irq_domain_xlate_twocell,
 };

 /*
  * exynos_eint_wkup_init() - setup handling of external wakeup interrupts.
  * @d: driver data of samsung pinctrl driver.
  */
 static int exynos_eint_wkup_init(struct samsung_pinctrl_drv_data *d)
 {
 	struct device *dev = d->dev;
 	struct device_node *wkup_np = NULL;
 	struct device_node *np;
 	struct exynos_weint_data *weint_data;
 	int idx, irq;

 	for_each_child_of_node(dev->of_node, np) {
 		if (of_match_node(exynos_wkup_irq_ids, np)) {
 			wkup_np = np;
 			break;
 		}
 	}
 	if (!wkup_np)
 		return -ENODEV;

 	d->wkup_irqd = irq_domain_add_linear(wkup_np, d->ctrl->nr_wint,
 				&exynos_wkup_irqd_ops, d);
 	if (!d->wkup_irqd) {
 		dev_err(dev, "wakeup irq domain allocation failed\n");
 		return -ENXIO;
 	}

 	weint_data = devm_kzalloc(dev, sizeof(*weint_data) * 17, GFP_KERNEL);
 	if (!weint_data) {
 		dev_err(dev, "could not allocate memory for weint_data\n");
 		return -ENOMEM;
 	}

 	irq = irq_of_parse_and_map(wkup_np, 16);
 	if (irq) {
 		weint_data[16].domain = d->wkup_irqd;
 		irq_set_chained_handler(irq, exynos_irq_demux_eint16_31);
 		irq_set_handler_data(irq, &weint_data[16]);
 	} else {
 		dev_err(dev, "irq number for EINT16-32 not found\n");
 	}

 	for (idx = 0; idx < 16; idx++) {
 		weint_data[idx].domain = d->wkup_irqd;
 		weint_data[idx].irq = idx;

 		irq = irq_of_parse_and_map(wkup_np, idx);
 		if (irq) {
 			irq_set_handler_data(irq, &weint_data[idx]);
 			irq_set_chained_handler(irq, exynos_irq_eint0_15);
 		} else {
 			dev_err(dev, "irq number for eint-%x not found\n", idx);
 		}
 	}
 	return 0;
 }

 /* pin banks of exynos4210 pin-controller 0 */
 static struct samsung_pin_bank exynos4210_pin_banks0[] = {
 	EXYNOS_PIN_BANK_EINTG(0x000, EXYNOS4210_GPIO_A0, "gpa0"),
 	EXYNOS_PIN_BANK_EINTG(0x020, EXYNOS4210_GPIO_A1, "gpa1"),
 	EXYNOS_PIN_BANK_EINTG(0x040, EXYNOS4210_GPIO_B, "gpb"),
 	EXYNOS_PIN_BANK_EINTG(0x060, EXYNOS4210_GPIO_C0, "gpc0"),
 	EXYNOS_PIN_BANK_EINTG(0x080, EXYNOS4210_GPIO_C1, "gpc1"),
 	EXYNOS_PIN_BANK_EINTG(0x0A0, EXYNOS4210_GPIO_D0, "gpd0"),
 	EXYNOS_PIN_BANK_EINTG(0x0C0, EXYNOS4210_GPIO_D1, "gpd1"),
 	EXYNOS_PIN_BANK_EINTG(0x0E0, EXYNOS4210_GPIO_E0, "gpe0"),
 	EXYNOS_PIN_BANK_EINTG(0x100, EXYNOS4210_GPIO_E1, "gpe1"),
 	EXYNOS_PIN_BANK_EINTG(0x120, EXYNOS4210_GPIO_E2, "gpe2"),
 	EXYNOS_PIN_BANK_EINTG(0x140, EXYNOS4210_GPIO_E3, "gpe3"),
 	EXYNOS_PIN_BANK_EINTG(0x160, EXYNOS4210_GPIO_E4, "gpe4"),
 	EXYNOS_PIN_BANK_EINTG(0x180, EXYNOS4210_GPIO_F0, "gpf0"),
 	EXYNOS_PIN_BANK_EINTG(0x1A0, EXYNOS4210_GPIO_F1, "gpf1"),
 	EXYNOS_PIN_BANK_EINTG(0x1C0, EXYNOS4210_GPIO_F2, "gpf2"),
 	EXYNOS_PIN_BANK_EINTG(0x1E0, EXYNOS4210_GPIO_F3, "gpf3"),
 };

 /* pin banks of exynos4210 pin-controller 1 */
 static struct samsung_pin_bank exynos4210_pin_banks1[] = {
 	EXYNOS_PIN_BANK_EINTG(0x000, EXYNOS4210_GPIO_J0, "gpj0"),
 	EXYNOS_PIN_BANK_EINTG(0x020, EXYNOS4210_GPIO_J1, "gpj1"),
 	EXYNOS_PIN_BANK_EINTG(0x040, EXYNOS4210_GPIO_K0, "gpk0"),
 	EXYNOS_PIN_BANK_EINTG(0x060, EXYNOS4210_GPIO_K1, "gpk1"),
 	EXYNOS_PIN_BANK_EINTG(0x080, EXYNOS4210_GPIO_K2, "gpk2"),
 	EXYNOS_PIN_BANK_EINTG(0x0A0, EXYNOS4210_GPIO_K3, "gpk3"),
 	EXYNOS_PIN_BANK_EINTG(0x0C0, EXYNOS4210_GPIO_L0, "gpl0"),
 	EXYNOS_PIN_BANK_EINTG(0x0E0, EXYNOS4210_GPIO_L1, "gpl1"),
 	EXYNOS_PIN_BANK_EINTG(0x100, EXYNOS4210_GPIO_L2, "gpl2"),
 	EXYNOS_PIN_BANK_EINTN(0x120, EXYNOS4210_GPIO_Y0, "gpy0"),
 	EXYNOS_PIN_BANK_EINTN(0x140, EXYNOS4210_GPIO_Y1, "gpy1"),
 	EXYNOS_PIN_BANK_EINTN(0x160, EXYNOS4210_GPIO_Y2, "gpy2"),
 	EXYNOS_PIN_BANK_EINTN(0x180, EXYNOS4210_GPIO_Y3, "gpy3"),
 	EXYNOS_PIN_BANK_EINTN(0x1A0, EXYNOS4210_GPIO_Y4, "gpy4"),
 	EXYNOS_PIN_BANK_EINTN(0x1C0, EXYNOS4210_GPIO_Y5, "gpy5"),
 	EXYNOS_PIN_BANK_EINTN(0x1E0, EXYNOS4210_GPIO_Y6, "gpy6"),
 	EXYNOS_PIN_BANK_EINTN(0xC00, EXYNOS4210_GPIO_X0, "gpx0"),
 	EXYNOS_PIN_BANK_EINTN(0xC20, EXYNOS4210_GPIO_X1, "gpx1"),
 	EXYNOS_PIN_BANK_EINTN(0xC40, EXYNOS4210_GPIO_X2, "gpx2"),
 	EXYNOS_PIN_BANK_EINTN(0xC60, EXYNOS4210_GPIO_X3, "gpx3"),
 };

 /* pin banks of exynos4210 pin-controller 2 */
 static struct samsung_pin_bank exynos4210_pin_banks2[] = {
 	EXYNOS_PIN_BANK_EINTN(0x000, EXYNOS4210_GPIO_Z, "gpz"),
 };

 /*
  * Samsung pinctrl driver data for Exynos4210 SoC. Exynos4210 SoC includes
  * three gpio/pin-mux/pinconfig controllers.
  */
 struct samsung_pin_ctrl exynos4210_pin_ctrl[] = {
 	{
 		/* pin-controller instance 0 data */
 		.pin_banks	= exynos4210_pin_banks0,
 		.nr_banks	= ARRAY_SIZE(exynos4210_pin_banks0),
 		.base		= EXYNOS4210_GPIO_A0_START,
 		.nr_pins	= EXYNOS4210_GPIOA_NR_PINS,
 		.nr_gint	= EXYNOS4210_GPIOA_NR_GINT,
 		.geint_con	= EXYNOS_GPIO_ECON_OFFSET,
 		.geint_mask	= EXYNOS_GPIO_EMASK_OFFSET,
 		.geint_pend	= EXYNOS_GPIO_EPEND_OFFSET,
 		.svc		= EXYNOS_SVC_OFFSET,
 		.eint_gpio_init = exynos_eint_gpio_init,
 		.label		= "exynos4210-gpio-ctrl0",
 	}, {
 		/* pin-controller instance 1 data */
 		.pin_banks	= exynos4210_pin_banks1,
 		.nr_banks	= ARRAY_SIZE(exynos4210_pin_banks1),
 		.base		= EXYNOS4210_GPIOA_NR_PINS,
 		.nr_pins	= EXYNOS4210_GPIOB_NR_PINS,
 		.nr_gint	= EXYNOS4210_GPIOB_NR_GINT,
 		.nr_wint	= 32,
 		.geint_con	= EXYNOS_GPIO_ECON_OFFSET,
 		.geint_mask	= EXYNOS_GPIO_EMASK_OFFSET,
 		.geint_pend	= EXYNOS_GPIO_EPEND_OFFSET,
 		.weint_con	= EXYNOS_WKUP_ECON_OFFSET,
 		.weint_mask	= EXYNOS_WKUP_EMASK_OFFSET,
 		.weint_pend	= EXYNOS_WKUP_EPEND_OFFSET,
 		.svc		= EXYNOS_SVC_OFFSET,
 		.eint_gpio_init = exynos_eint_gpio_init,
 		.eint_wkup_init = exynos_eint_wkup_init,
 		.label		= "exynos4210-gpio-ctrl1",
 	}, {
 		/* pin-controller instance 2 data */
 		.pin_banks	= exynos4210_pin_banks2,
 		.nr_banks	= ARRAY_SIZE(exynos4210_pin_banks2),
 		.base		= EXYNOS4210_GPIOA_NR_PINS +
 					EXYNOS4210_GPIOB_NR_PINS,
 		.nr_pins	= EXYNOS4210_GPIOC_NR_PINS,
 		.label		= "exynos4210-gpio-ctrl2",
 	},
 };
	/*
	* Exynos specific support for Samsung pinctrl/gpiolib driver with eint support.
	*
	* Copyright (c) 2012 Samsung Electronics Co., Ltd.
	* http://www.samsung.com
	* Copyright (c) 2012 Linaro Ltd
	* http://www.linaro.org
	*
	* Author: Thomas Abraham <thomas.ab@samsung.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 file contains the Samsung Exynos specific information required by the
	* the Samsung pinctrl/gpiolib driver. It also includes the implementation of
	* external gpio and wakeup interrupt support.
	*/

	#include <linux/module.h>
	#include <linux/device.h>
	#include <linux/interrupt.h>
	#include <linux/irqdomain.h>
	#include <linux/irq.h>
	#include <linux/of_irq.h>
	#include <linux/io.h>
	#include <linux/slab.h>
	#include <linux/err.h>

	#include <asm/mach/irq.h>

	#include "pinctrl-samsung.h"
	#include "pinctrl-exynos.h"

	/* list of external wakeup controllers supported */
	static const struct of_device_id exynos_wkup_irq_ids[] = {
	{ .compatible = "samsung,exynos4210-wakeup-eint", },
	};

	static void exynos_gpio_irq_unmask(struct irq_data *irqd)
	{
	struct samsung_pinctrl_drv_data *d = irqd->domain->host_data;
	struct exynos_geint_data *edata = irq_data_get_irq_handler_data(irqd);
	unsigned long reg_mask = d->ctrl->geint_mask + edata->eint_offset;
	unsigned long mask;

	mask = readl(d->virt_base + reg_mask);
	mask &= ~(1 << edata->pin);
	writel(mask, d->virt_base + reg_mask);
	}

	static void exynos_gpio_irq_mask(struct irq_data *irqd)
	{
	struct samsung_pinctrl_drv_data *d = irqd->domain->host_data;
	struct exynos_geint_data *edata = irq_data_get_irq_handler_data(irqd);
	unsigned long reg_mask = d->ctrl->geint_mask + edata->eint_offset;
	unsigned long mask;

	mask = readl(d->virt_base + reg_mask);
	mask \|= 1 << edata->pin;
	writel(mask, d->virt_base + reg_mask);
	}

	static void exynos_gpio_irq_ack(struct irq_data *irqd)
	{
	struct samsung_pinctrl_drv_data *d = irqd->domain->host_data;
	struct exynos_geint_data *edata = irq_data_get_irq_handler_data(irqd);
	unsigned long reg_pend = d->ctrl->geint_pend + edata->eint_offset;

	writel(1 << edata->pin, d->virt_base + reg_pend);
	}

	static int exynos_gpio_irq_set_type(struct irq_data *irqd, unsigned int type)
	{
	struct samsung_pinctrl_drv_data *d = irqd->domain->host_data;
	struct samsung_pin_ctrl *ctrl = d->ctrl;
	struct exynos_geint_data *edata = irq_data_get_irq_handler_data(irqd);
	struct samsung_pin_bank *bank = edata->bank;
	unsigned int shift = EXYNOS_EINT_CON_LEN * edata->pin;
	unsigned int con, trig_type;
	unsigned long reg_con = ctrl->geint_con + edata->eint_offset;
	unsigned int mask;

	switch (type) {
	case IRQ_TYPE_EDGE_RISING:
	trig_type = EXYNOS_EINT_EDGE_RISING;
	break;
	case IRQ_TYPE_EDGE_FALLING:
	trig_type = EXYNOS_EINT_EDGE_FALLING;
	break;
	case IRQ_TYPE_EDGE_BOTH:
	trig_type = EXYNOS_EINT_EDGE_BOTH;
	break;
	case IRQ_TYPE_LEVEL_HIGH:
	trig_type = EXYNOS_EINT_LEVEL_HIGH;
	break;
	case IRQ_TYPE_LEVEL_LOW:
	trig_type = EXYNOS_EINT_LEVEL_LOW;
	break;
	default:
	pr_err("unsupported external interrupt type\n");
	return -EINVAL;
	}

	if (type & IRQ_TYPE_EDGE_BOTH)
	__irq_set_handler_locked(irqd->irq, handle_edge_irq);
	else
	__irq_set_handler_locked(irqd->irq, handle_level_irq);

	con = readl(d->virt_base + reg_con);
	con &= ~(EXYNOS_EINT_CON_MASK << shift);
	con \|= trig_type << shift;
	writel(con, d->virt_base + reg_con);

	reg_con = bank->pctl_offset;
	shift = edata->pin * bank->func_width;
	mask = (1 << bank->func_width) - 1;

	con = readl(d->virt_base + reg_con);
	con &= ~(mask << shift);
	con \|= EXYNOS_EINT_FUNC << shift;
	writel(con, d->virt_base + reg_con);

	return 0;
	}

	/*
	* irq_chip for gpio interrupts.
	*/
	static struct irq_chip exynos_gpio_irq_chip = {
	.name = "exynos_gpio_irq_chip",
	.irq_unmask = exynos_gpio_irq_unmask,
	.irq_mask = exynos_gpio_irq_mask,
	.irq_ack = exynos_gpio_irq_ack,
	.irq_set_type = exynos_gpio_irq_set_type,
	};

	/*
	* given a controller-local external gpio interrupt number, prepare the handler
	* data for it.
	*/
	static struct exynos_geint_data *exynos_get_eint_data(irq_hw_number_t hw,
	struct samsung_pinctrl_drv_data *d)
	{
	struct samsung_pin_bank *bank = d->ctrl->pin_banks;
	struct exynos_geint_data *eint_data;
	unsigned int nr_banks = d->ctrl->nr_banks, idx;
	unsigned int irq_base = 0, eint_offset = 0;

	if (hw >= d->ctrl->nr_gint) {
	dev_err(d->dev, "unsupported ext-gpio interrupt\n");
	return NULL;
	}

	for (idx = 0; idx < nr_banks; idx++, bank++) {
	if (bank->eint_type != EINT_TYPE_GPIO)
	continue;
	if ((hw >= irq_base) && (hw < (irq_base + bank->nr_pins)))
	break;
	irq_base += bank->nr_pins;
	eint_offset += 4;
	}

	if (idx == nr_banks) {
	dev_err(d->dev, "pin bank not found for ext-gpio interrupt\n");
	return NULL;
	}

	eint_data = devm_kzalloc(d->dev, sizeof(*eint_data), GFP_KERNEL);
	if (!eint_data) {
	dev_err(d->dev, "no memory for eint-gpio data\n");
	return NULL;
	}

	eint_data->bank = bank;
	eint_data->pin = hw - irq_base;
	eint_data->eint_offset = eint_offset;
	return eint_data;
	}

	static int exynos_gpio_irq_map(struct irq_domain *h, unsigned int virq,
	irq_hw_number_t hw)
	{
	struct samsung_pinctrl_drv_data *d = h->host_data;
	struct exynos_geint_data *eint_data;

	eint_data = exynos_get_eint_data(hw, d);
	if (!eint_data)
	return -EINVAL;

	irq_set_handler_data(virq, eint_data);
	irq_set_chip_data(virq, h->host_data);
	irq_set_chip_and_handler(virq, &exynos_gpio_irq_chip,
	handle_level_irq);
	set_irq_flags(virq, IRQF_VALID);
	return 0;
	}

	static void exynos_gpio_irq_unmap(struct irq_domain *h, unsigned int virq)
	{
	struct samsung_pinctrl_drv_data *d = h->host_data;
	struct exynos_geint_data *eint_data;

	eint_data = irq_get_handler_data(virq);
	devm_kfree(d->dev, eint_data);
	}

	/*
	* irq domain callbacks for external gpio interrupt controller.
	*/
	static const struct irq_domain_ops exynos_gpio_irqd_ops = {
	.map = exynos_gpio_irq_map,
	.unmap = exynos_gpio_irq_unmap,
	.xlate = irq_domain_xlate_twocell,
	};

	static irqreturn_t exynos_eint_gpio_irq(int irq, void *data)
	{
	struct samsung_pinctrl_drv_data *d = data;
	struct samsung_pin_ctrl *ctrl = d->ctrl;
	struct samsung_pin_bank *bank = ctrl->pin_banks;
	unsigned int svc, group, pin, virq;

	svc = readl(d->virt_base + ctrl->svc);
	group = EXYNOS_SVC_GROUP(svc);
	pin = svc & EXYNOS_SVC_NUM_MASK;

	if (!group)
	return IRQ_HANDLED;
	bank += (group - 1);

	virq = irq_linear_revmap(d->gpio_irqd, bank->irq_base + pin);
	if (!virq)
	return IRQ_NONE;
	generic_handle_irq(virq);
	return IRQ_HANDLED;
	}

	/*
	* exynos_eint_gpio_init() - setup handling of external gpio interrupts.
	* @d: driver data of samsung pinctrl driver.
	*/
	static int exynos_eint_gpio_init(struct samsung_pinctrl_drv_data *d)
	{
	struct device *dev = d->dev;
	unsigned int ret;

	if (!d->irq) {
	dev_err(dev, "irq number not available\n");
	return -EINVAL;
	}

	ret = devm_request_irq(dev, d->irq, exynos_eint_gpio_irq,
	0, dev_name(dev), d);
	if (ret) {
	dev_err(dev, "irq request failed\n");
	return -ENXIO;
	}

	d->gpio_irqd = irq_domain_add_linear(dev->of_node, d->ctrl->nr_gint,
	&exynos_gpio_irqd_ops, d);
	if (!d->gpio_irqd) {
	dev_err(dev, "gpio irq domain allocation failed\n");
	return -ENXIO;
	}

	return 0;
	}

	static void exynos_wkup_irq_unmask(struct irq_data *irqd)
	{
	struct samsung_pinctrl_drv_data *d = irq_data_get_irq_chip_data(irqd);
	unsigned int bank = irqd->hwirq / EXYNOS_EINT_MAX_PER_BANK;
	unsigned int pin = irqd->hwirq & (EXYNOS_EINT_MAX_PER_BANK - 1);
	unsigned long reg_mask = d->ctrl->weint_mask + (bank << 2);
	unsigned long mask;

	mask = readl(d->virt_base + reg_mask);
	mask &= ~(1 << pin);
	writel(mask, d->virt_base + reg_mask);
	}

	static void exynos_wkup_irq_mask(struct irq_data *irqd)
	{
	struct samsung_pinctrl_drv_data *d = irq_data_get_irq_chip_data(irqd);
	unsigned int bank = irqd->hwirq / EXYNOS_EINT_MAX_PER_BANK;
	unsigned int pin = irqd->hwirq & (EXYNOS_EINT_MAX_PER_BANK - 1);
	unsigned long reg_mask = d->ctrl->weint_mask + (bank << 2);
	unsigned long mask;

	mask = readl(d->virt_base + reg_mask);
	mask \|= 1 << pin;
	writel(mask, d->virt_base + reg_mask);
	}

	static void exynos_wkup_irq_ack(struct irq_data *irqd)
	{
	struct samsung_pinctrl_drv_data *d = irq_data_get_irq_chip_data(irqd);
	unsigned int bank = irqd->hwirq / EXYNOS_EINT_MAX_PER_BANK;
	unsigned int pin = irqd->hwirq & (EXYNOS_EINT_MAX_PER_BANK - 1);
	unsigned long pend = d->ctrl->weint_pend + (bank << 2);

	writel(1 << pin, d->virt_base + pend);
	}

	static int exynos_wkup_irq_set_type(struct irq_data *irqd, unsigned int type)
	{
	struct samsung_pinctrl_drv_data *d = irq_data_get_irq_chip_data(irqd);
	unsigned int bank = irqd->hwirq / EXYNOS_EINT_MAX_PER_BANK;
	unsigned int pin = irqd->hwirq & (EXYNOS_EINT_MAX_PER_BANK - 1);
	unsigned long reg_con = d->ctrl->weint_con + (bank << 2);
	unsigned long shift = EXYNOS_EINT_CON_LEN * pin;
	unsigned long con, trig_type;

	switch (type) {
	case IRQ_TYPE_EDGE_RISING:
	trig_type = EXYNOS_EINT_EDGE_RISING;
	break;
	case IRQ_TYPE_EDGE_FALLING:
	trig_type = EXYNOS_EINT_EDGE_FALLING;
	break;
	case IRQ_TYPE_EDGE_BOTH:
	trig_type = EXYNOS_EINT_EDGE_BOTH;
	break;
	case IRQ_TYPE_LEVEL_HIGH:
	trig_type = EXYNOS_EINT_LEVEL_HIGH;
	break;
	case IRQ_TYPE_LEVEL_LOW:
	trig_type = EXYNOS_EINT_LEVEL_LOW;
	break;
	default:
	pr_err("unsupported external interrupt type\n");
	return -EINVAL;
	}

	if (type & IRQ_TYPE_EDGE_BOTH)
	__irq_set_handler_locked(irqd->irq, handle_edge_irq);
	else
	__irq_set_handler_locked(irqd->irq, handle_level_irq);

	con = readl(d->virt_base + reg_con);
	con &= ~(EXYNOS_EINT_CON_MASK << shift);
	con \|= trig_type << shift;
	writel(con, d->virt_base + reg_con);
	return 0;
	}

	/*
	* irq_chip for wakeup interrupts
	*/
	static struct irq_chip exynos_wkup_irq_chip = {
	.name = "exynos_wkup_irq_chip",
	.irq_unmask = exynos_wkup_irq_unmask,
	.irq_mask = exynos_wkup_irq_mask,
	.irq_ack = exynos_wkup_irq_ack,
	.irq_set_type = exynos_wkup_irq_set_type,
	};

	/* interrupt handler for wakeup interrupts 0..15 */
	static void exynos_irq_eint0_15(unsigned int irq, struct irq_desc *desc)
	{
	struct exynos_weint_data *eintd = irq_get_handler_data(irq);
	struct irq_chip *chip = irq_get_chip(irq);
	int eint_irq;

	chained_irq_enter(chip, desc);
	chip->irq_mask(&desc->irq_data);

	if (chip->irq_ack)
	chip->irq_ack(&desc->irq_data);

	eint_irq = irq_linear_revmap(eintd->domain, eintd->irq);
	generic_handle_irq(eint_irq);
	chip->irq_unmask(&desc->irq_data);
	chained_irq_exit(chip, desc);
	}

	static inline void exynos_irq_demux_eint(int irq_base, unsigned long pend,
	struct irq_domain *domain)
	{
	unsigned int irq;

	while (pend) {
	irq = fls(pend) - 1;
	generic_handle_irq(irq_find_mapping(domain, irq_base + irq));
	pend &= ~(1 << irq);
	}
	}

	/* interrupt handler for wakeup interrupt 16 */
	static void exynos_irq_demux_eint16_31(unsigned int irq, struct irq_desc *desc)
	{
	struct irq_chip *chip = irq_get_chip(irq);
	struct exynos_weint_data *eintd = irq_get_handler_data(irq);
	struct samsung_pinctrl_drv_data *d = eintd->domain->host_data;
	unsigned long pend;
	unsigned long mask;

	chained_irq_enter(chip, desc);
	pend = readl(d->virt_base + d->ctrl->weint_pend + 0x8);
	mask = readl(d->virt_base + d->ctrl->weint_mask + 0x8);
	exynos_irq_demux_eint(16, pend & ~mask, eintd->domain);
	pend = readl(d->virt_base + d->ctrl->weint_pend + 0xC);
	mask = readl(d->virt_base + d->ctrl->weint_mask + 0xC);
	exynos_irq_demux_eint(24, pend & ~mask, eintd->domain);
	chained_irq_exit(chip, desc);
	}

	static int exynos_wkup_irq_map(struct irq_domain *h, unsigned int virq,
	irq_hw_number_t hw)
	{
	irq_set_chip_and_handler(virq, &exynos_wkup_irq_chip, handle_level_irq);
	irq_set_chip_data(virq, h->host_data);
	set_irq_flags(virq, IRQF_VALID);
	return 0;
	}

	/*
	* irq domain callbacks for external wakeup interrupt controller.
	*/
	static const struct irq_domain_ops exynos_wkup_irqd_ops = {
	.map = exynos_wkup_irq_map,
	.xlate = irq_domain_xlate_twocell,
	};

	/*
	* exynos_eint_wkup_init() - setup handling of external wakeup interrupts.
	* @d: driver data of samsung pinctrl driver.
	*/
	static int exynos_eint_wkup_init(struct samsung_pinctrl_drv_data *d)
	{
	struct device *dev = d->dev;
	struct device_node *wkup_np = NULL;
	struct device_node *np;
	struct exynos_weint_data *weint_data;
	int idx, irq;

	for_each_child_of_node(dev->of_node, np) {
	if (of_match_node(exynos_wkup_irq_ids, np)) {
	wkup_np = np;
	break;
	}
	}
	if (!wkup_np)
	return -ENODEV;

	d->wkup_irqd = irq_domain_add_linear(wkup_np, d->ctrl->nr_wint,
	&exynos_wkup_irqd_ops, d);
	if (!d->wkup_irqd) {
	dev_err(dev, "wakeup irq domain allocation failed\n");
	return -ENXIO;
	}

	weint_data = devm_kzalloc(dev, sizeof(weint_data) 17, GFP_KERNEL);
	if (!weint_data) {
	dev_err(dev, "could not allocate memory for weint_data\n");
	return -ENOMEM;
	}

	irq = irq_of_parse_and_map(wkup_np, 16);
	if (irq) {
	weint_data[16].domain = d->wkup_irqd;
	irq_set_chained_handler(irq, exynos_irq_demux_eint16_31);
	irq_set_handler_data(irq, &weint_data[16]);
	} else {
	dev_err(dev, "irq number for EINT16-32 not found\n");
	}

	for (idx = 0; idx < 16; idx++) {
	weint_data[idx].domain = d->wkup_irqd;
	weint_data[idx].irq = idx;

	irq = irq_of_parse_and_map(wkup_np, idx);
	if (irq) {
	irq_set_handler_data(irq, &weint_data[idx]);
	irq_set_chained_handler(irq, exynos_irq_eint0_15);
	} else {
	dev_err(dev, "irq number for eint-%x not found\n", idx);
	}
	}
	return 0;
	}

	/* pin banks of exynos4210 pin-controller 0 */
	static struct samsung_pin_bank exynos4210_pin_banks0[] = {
	EXYNOS_PIN_BANK_EINTG(0x000, EXYNOS4210_GPIO_A0, "gpa0"),
	EXYNOS_PIN_BANK_EINTG(0x020, EXYNOS4210_GPIO_A1, "gpa1"),
	EXYNOS_PIN_BANK_EINTG(0x040, EXYNOS4210_GPIO_B, "gpb"),
	EXYNOS_PIN_BANK_EINTG(0x060, EXYNOS4210_GPIO_C0, "gpc0"),
	EXYNOS_PIN_BANK_EINTG(0x080, EXYNOS4210_GPIO_C1, "gpc1"),
	EXYNOS_PIN_BANK_EINTG(0x0A0, EXYNOS4210_GPIO_D0, "gpd0"),
	EXYNOS_PIN_BANK_EINTG(0x0C0, EXYNOS4210_GPIO_D1, "gpd1"),
	EXYNOS_PIN_BANK_EINTG(0x0E0, EXYNOS4210_GPIO_E0, "gpe0"),
	EXYNOS_PIN_BANK_EINTG(0x100, EXYNOS4210_GPIO_E1, "gpe1"),
	EXYNOS_PIN_BANK_EINTG(0x120, EXYNOS4210_GPIO_E2, "gpe2"),
	EXYNOS_PIN_BANK_EINTG(0x140, EXYNOS4210_GPIO_E3, "gpe3"),
	EXYNOS_PIN_BANK_EINTG(0x160, EXYNOS4210_GPIO_E4, "gpe4"),
	EXYNOS_PIN_BANK_EINTG(0x180, EXYNOS4210_GPIO_F0, "gpf0"),
	EXYNOS_PIN_BANK_EINTG(0x1A0, EXYNOS4210_GPIO_F1, "gpf1"),
	EXYNOS_PIN_BANK_EINTG(0x1C0, EXYNOS4210_GPIO_F2, "gpf2"),
	EXYNOS_PIN_BANK_EINTG(0x1E0, EXYNOS4210_GPIO_F3, "gpf3"),
	};

	/* pin banks of exynos4210 pin-controller 1 */
	static struct samsung_pin_bank exynos4210_pin_banks1[] = {
	EXYNOS_PIN_BANK_EINTG(0x000, EXYNOS4210_GPIO_J0, "gpj0"),
	EXYNOS_PIN_BANK_EINTG(0x020, EXYNOS4210_GPIO_J1, "gpj1"),
	EXYNOS_PIN_BANK_EINTG(0x040, EXYNOS4210_GPIO_K0, "gpk0"),
	EXYNOS_PIN_BANK_EINTG(0x060, EXYNOS4210_GPIO_K1, "gpk1"),
	EXYNOS_PIN_BANK_EINTG(0x080, EXYNOS4210_GPIO_K2, "gpk2"),
	EXYNOS_PIN_BANK_EINTG(0x0A0, EXYNOS4210_GPIO_K3, "gpk3"),
	EXYNOS_PIN_BANK_EINTG(0x0C0, EXYNOS4210_GPIO_L0, "gpl0"),
	EXYNOS_PIN_BANK_EINTG(0x0E0, EXYNOS4210_GPIO_L1, "gpl1"),
	EXYNOS_PIN_BANK_EINTG(0x100, EXYNOS4210_GPIO_L2, "gpl2"),
	EXYNOS_PIN_BANK_EINTN(0x120, EXYNOS4210_GPIO_Y0, "gpy0"),
	EXYNOS_PIN_BANK_EINTN(0x140, EXYNOS4210_GPIO_Y1, "gpy1"),
	EXYNOS_PIN_BANK_EINTN(0x160, EXYNOS4210_GPIO_Y2, "gpy2"),
	EXYNOS_PIN_BANK_EINTN(0x180, EXYNOS4210_GPIO_Y3, "gpy3"),
	EXYNOS_PIN_BANK_EINTN(0x1A0, EXYNOS4210_GPIO_Y4, "gpy4"),
	EXYNOS_PIN_BANK_EINTN(0x1C0, EXYNOS4210_GPIO_Y5, "gpy5"),
	EXYNOS_PIN_BANK_EINTN(0x1E0, EXYNOS4210_GPIO_Y6, "gpy6"),
	EXYNOS_PIN_BANK_EINTN(0xC00, EXYNOS4210_GPIO_X0, "gpx0"),
	EXYNOS_PIN_BANK_EINTN(0xC20, EXYNOS4210_GPIO_X1, "gpx1"),
	EXYNOS_PIN_BANK_EINTN(0xC40, EXYNOS4210_GPIO_X2, "gpx2"),
	EXYNOS_PIN_BANK_EINTN(0xC60, EXYNOS4210_GPIO_X3, "gpx3"),
	};

	/* pin banks of exynos4210 pin-controller 2 */
	static struct samsung_pin_bank exynos4210_pin_banks2[] = {
	EXYNOS_PIN_BANK_EINTN(0x000, EXYNOS4210_GPIO_Z, "gpz"),
	};

	/*
	* Samsung pinctrl driver data for Exynos4210 SoC. Exynos4210 SoC includes
	* three gpio/pin-mux/pinconfig controllers.
	*/
	struct samsung_pin_ctrl exynos4210_pin_ctrl[] = {
	{
	/* pin-controller instance 0 data */
	.pin_banks = exynos4210_pin_banks0,
	.nr_banks = ARRAY_SIZE(exynos4210_pin_banks0),
	.base = EXYNOS4210_GPIO_A0_START,
	.nr_pins = EXYNOS4210_GPIOA_NR_PINS,
	.nr_gint = EXYNOS4210_GPIOA_NR_GINT,
	.geint_con = EXYNOS_GPIO_ECON_OFFSET,
	.geint_mask = EXYNOS_GPIO_EMASK_OFFSET,
	.geint_pend = EXYNOS_GPIO_EPEND_OFFSET,
	.svc = EXYNOS_SVC_OFFSET,
	.eint_gpio_init = exynos_eint_gpio_init,
	.label = "exynos4210-gpio-ctrl0",
	}, {
	/* pin-controller instance 1 data */
	.pin_banks = exynos4210_pin_banks1,
	.nr_banks = ARRAY_SIZE(exynos4210_pin_banks1),
	.base = EXYNOS4210_GPIOA_NR_PINS,
	.nr_pins = EXYNOS4210_GPIOB_NR_PINS,
	.nr_gint = EXYNOS4210_GPIOB_NR_GINT,
	.nr_wint = 32,
	.geint_con = EXYNOS_GPIO_ECON_OFFSET,
	.geint_mask = EXYNOS_GPIO_EMASK_OFFSET,
	.geint_pend = EXYNOS_GPIO_EPEND_OFFSET,
	.weint_con = EXYNOS_WKUP_ECON_OFFSET,
	.weint_mask = EXYNOS_WKUP_EMASK_OFFSET,
	.weint_pend = EXYNOS_WKUP_EPEND_OFFSET,
	.svc = EXYNOS_SVC_OFFSET,
	.eint_gpio_init = exynos_eint_gpio_init,
	.eint_wkup_init = exynos_eint_wkup_init,
	.label = "exynos4210-gpio-ctrl1",
	}, {
	/* pin-controller instance 2 data */
	.pin_banks = exynos4210_pin_banks2,
	.nr_banks = ARRAY_SIZE(exynos4210_pin_banks2),
	.base = EXYNOS4210_GPIOA_NR_PINS +
	EXYNOS4210_GPIOB_NR_PINS,
	.nr_pins = EXYNOS4210_GPIOC_NR_PINS,
	.label = "exynos4210-gpio-ctrl2",
	},
	};