drivers/irqchip/irq-renesas-rzg2l.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * Renesas RZ/G2L IRQC Driver
  *
  * Copyright (C) 2022 Renesas Electronics Corporation.
  *
  * Author: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
  */

 #include <linux/bitfield.h>
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/io.h>
 #include <linux/irqchip.h>
 #include <linux/irqdomain.h>
 #include <linux/of_address.h>
 #include <linux/of_platform.h>
 #include <linux/pm_runtime.h>
 #include <linux/reset.h>
 #include <linux/spinlock.h>

 #define IRQC_IRQ_START			1
 #define IRQC_IRQ_COUNT			8
 #define IRQC_TINT_START			(IRQC_IRQ_START + IRQC_IRQ_COUNT)
 #define IRQC_TINT_COUNT			32
 #define IRQC_NUM_IRQ			(IRQC_TINT_START + IRQC_TINT_COUNT)

 #define ISCR				0x10
 #define IITSR				0x14
 #define TSCR				0x20
 #define TITSR0				0x24
 #define TITSR1				0x28
 #define TITSR0_MAX_INT			16
 #define TITSEL_WIDTH			0x2
 #define TSSR(n)				(0x30 + ((n) * 4))
 #define TIEN				BIT(7)
 #define TSSEL_SHIFT(n)			(8 * (n))
 #define TSSEL_MASK			GENMASK(7, 0)
 #define IRQ_MASK			0x3

 #define TSSR_OFFSET(n)			((n) % 4)
 #define TSSR_INDEX(n)			((n) / 4)

 #define TITSR_TITSEL_EDGE_RISING	0
 #define TITSR_TITSEL_EDGE_FALLING	1
 #define TITSR_TITSEL_LEVEL_HIGH		2
 #define TITSR_TITSEL_LEVEL_LOW		3

 #define IITSR_IITSEL(n, sense)		((sense) << ((n) * 2))
 #define IITSR_IITSEL_LEVEL_LOW		0
 #define IITSR_IITSEL_EDGE_FALLING	1
 #define IITSR_IITSEL_EDGE_RISING	2
 #define IITSR_IITSEL_EDGE_BOTH		3
 #define IITSR_IITSEL_MASK(n)		IITSR_IITSEL((n), 3)

 #define TINT_EXTRACT_HWIRQ(x)           FIELD_GET(GENMASK(15, 0), (x))
 #define TINT_EXTRACT_GPIOINT(x)         FIELD_GET(GENMASK(31, 16), (x))

 struct rzg2l_irqc_priv {
 	void __iomem *base;
 	struct irq_fwspec fwspec[IRQC_NUM_IRQ];
 	raw_spinlock_t lock;
 };

 static struct rzg2l_irqc_priv *irq_data_to_priv(struct irq_data *data)
 {
 	return data->domain->host_data;
 }

 static void rzg2l_irq_eoi(struct irq_data *d)
 {
 	unsigned int hw_irq = irqd_to_hwirq(d) - IRQC_IRQ_START;
 	struct rzg2l_irqc_priv *priv = irq_data_to_priv(d);
 	u32 bit = BIT(hw_irq);
 	u32 reg;

 	reg = readl_relaxed(priv->base + ISCR);
 	if (reg & bit)
 		writel_relaxed(reg & ~bit, priv->base + ISCR);
 }

 static void rzg2l_tint_eoi(struct irq_data *d)
 {
 	unsigned int hw_irq = irqd_to_hwirq(d) - IRQC_TINT_START;
 	struct rzg2l_irqc_priv *priv = irq_data_to_priv(d);
 	u32 bit = BIT(hw_irq);
 	u32 reg;

 	reg = readl_relaxed(priv->base + TSCR);
 	if (reg & bit)
 		writel_relaxed(reg & ~bit, priv->base + TSCR);
 }

 static void rzg2l_irqc_eoi(struct irq_data *d)
 {
 	struct rzg2l_irqc_priv *priv = irq_data_to_priv(d);
 	unsigned int hw_irq = irqd_to_hwirq(d);

 	raw_spin_lock(&priv->lock);
 	if (hw_irq >= IRQC_IRQ_START && hw_irq <= IRQC_IRQ_COUNT)
 		rzg2l_irq_eoi(d);
 	else if (hw_irq >= IRQC_TINT_START && hw_irq < IRQC_NUM_IRQ)
 		rzg2l_tint_eoi(d);
 	raw_spin_unlock(&priv->lock);
 	irq_chip_eoi_parent(d);
 }

 static void rzg2l_irqc_irq_disable(struct irq_data *d)
 {
 	unsigned int hw_irq = irqd_to_hwirq(d);

 	if (hw_irq >= IRQC_TINT_START && hw_irq < IRQC_NUM_IRQ) {
 		struct rzg2l_irqc_priv *priv = irq_data_to_priv(d);
 		u32 offset = hw_irq - IRQC_TINT_START;
 		u32 tssr_offset = TSSR_OFFSET(offset);
 		u8 tssr_index = TSSR_INDEX(offset);
 		u32 reg;

 		raw_spin_lock(&priv->lock);
 		reg = readl_relaxed(priv->base + TSSR(tssr_index));
 		reg &= ~(TSSEL_MASK << tssr_offset);
 		writel_relaxed(reg, priv->base + TSSR(tssr_index));
 		raw_spin_unlock(&priv->lock);
 	}
 	irq_chip_disable_parent(d);
 }

 static void rzg2l_irqc_irq_enable(struct irq_data *d)
 {
 	unsigned int hw_irq = irqd_to_hwirq(d);

 	if (hw_irq >= IRQC_TINT_START && hw_irq < IRQC_NUM_IRQ) {
 		struct rzg2l_irqc_priv *priv = irq_data_to_priv(d);
 		unsigned long tint = (uintptr_t)d->chip_data;
 		u32 offset = hw_irq - IRQC_TINT_START;
 		u32 tssr_offset = TSSR_OFFSET(offset);
 		u8 tssr_index = TSSR_INDEX(offset);
 		u32 reg;

 		raw_spin_lock(&priv->lock);
 		reg = readl_relaxed(priv->base + TSSR(tssr_index));
 		reg |= (TIEN | tint) << TSSEL_SHIFT(tssr_offset);
 		writel_relaxed(reg, priv->base + TSSR(tssr_index));
 		raw_spin_unlock(&priv->lock);
 	}
 	irq_chip_enable_parent(d);
 }

 static int rzg2l_irq_set_type(struct irq_data *d, unsigned int type)
 {
 	unsigned int hw_irq = irqd_to_hwirq(d) - IRQC_IRQ_START;
 	struct rzg2l_irqc_priv *priv = irq_data_to_priv(d);
 	u16 sense, tmp;

 	switch (type & IRQ_TYPE_SENSE_MASK) {
 	case IRQ_TYPE_LEVEL_LOW:
 		sense = IITSR_IITSEL_LEVEL_LOW;
 		break;

 	case IRQ_TYPE_EDGE_FALLING:
 		sense = IITSR_IITSEL_EDGE_FALLING;
 		break;

 	case IRQ_TYPE_EDGE_RISING:
 		sense = IITSR_IITSEL_EDGE_RISING;
 		break;

 	case IRQ_TYPE_EDGE_BOTH:
 		sense = IITSR_IITSEL_EDGE_BOTH;
 		break;

 	default:
 		return -EINVAL;
 	}

 	raw_spin_lock(&priv->lock);
 	tmp = readl_relaxed(priv->base + IITSR);
 	tmp &= ~IITSR_IITSEL_MASK(hw_irq);
 	tmp |= IITSR_IITSEL(hw_irq, sense);
 	writel_relaxed(tmp, priv->base + IITSR);
 	raw_spin_unlock(&priv->lock);

 	return 0;
 }

 static int rzg2l_tint_set_edge(struct irq_data *d, unsigned int type)
 {
 	struct rzg2l_irqc_priv *priv = irq_data_to_priv(d);
 	unsigned int hwirq = irqd_to_hwirq(d);
 	u32 titseln = hwirq - IRQC_TINT_START;
 	u32 offset;
 	u8 sense;
 	u32 reg;

 	switch (type & IRQ_TYPE_SENSE_MASK) {
 	case IRQ_TYPE_EDGE_RISING:
 		sense = TITSR_TITSEL_EDGE_RISING;
 		break;

 	case IRQ_TYPE_EDGE_FALLING:
 		sense = TITSR_TITSEL_EDGE_FALLING;
 		break;

 	default:
 		return -EINVAL;
 	}

 	offset = TITSR0;
 	if (titseln >= TITSR0_MAX_INT) {
 		titseln -= TITSR0_MAX_INT;
 		offset = TITSR1;
 	}

 	raw_spin_lock(&priv->lock);
 	reg = readl_relaxed(priv->base + offset);
 	reg &= ~(IRQ_MASK << (titseln * TITSEL_WIDTH));
 	reg |= sense << (titseln * TITSEL_WIDTH);
 	writel_relaxed(reg, priv->base + offset);
 	raw_spin_unlock(&priv->lock);

 	return 0;
 }

 static int rzg2l_irqc_set_type(struct irq_data *d, unsigned int type)
 {
 	unsigned int hw_irq = irqd_to_hwirq(d);
 	int ret = -EINVAL;

 	if (hw_irq >= IRQC_IRQ_START && hw_irq <= IRQC_IRQ_COUNT)
 		ret = rzg2l_irq_set_type(d, type);
 	else if (hw_irq >= IRQC_TINT_START && hw_irq < IRQC_NUM_IRQ)
 		ret = rzg2l_tint_set_edge(d, type);
 	if (ret)
 		return ret;

 	return irq_chip_set_type_parent(d, IRQ_TYPE_LEVEL_HIGH);
 }

 static const struct irq_chip irqc_chip = {
 	.name			= "rzg2l-irqc",
 	.irq_eoi		= rzg2l_irqc_eoi,
 	.irq_mask		= irq_chip_mask_parent,
 	.irq_unmask		= irq_chip_unmask_parent,
 	.irq_disable		= rzg2l_irqc_irq_disable,
 	.irq_enable		= rzg2l_irqc_irq_enable,
 	.irq_get_irqchip_state	= irq_chip_get_parent_state,
 	.irq_set_irqchip_state	= irq_chip_set_parent_state,
 	.irq_retrigger		= irq_chip_retrigger_hierarchy,
 	.irq_set_type		= rzg2l_irqc_set_type,
 	.flags			= IRQCHIP_MASK_ON_SUSPEND |
 				  IRQCHIP_SET_TYPE_MASKED |
 				  IRQCHIP_SKIP_SET_WAKE,
 };

 static int rzg2l_irqc_alloc(struct irq_domain *domain, unsigned int virq,
 			    unsigned int nr_irqs, void *arg)
 {
 	struct rzg2l_irqc_priv *priv = domain->host_data;
 	unsigned long tint = 0;
 	irq_hw_number_t hwirq;
 	unsigned int type;
 	int ret;

 	ret = irq_domain_translate_twocell(domain, arg, &hwirq, &type);
 	if (ret)
 		return ret;

 	/*
 	 * For TINT interrupts ie where pinctrl driver is child of irqc domain
 	 * the hwirq and TINT are encoded in fwspec->param[0].
 	 * hwirq for TINT range from 9-40, hwirq is embedded 0-15 bits and TINT
 	 * from 16-31 bits. TINT from the pinctrl driver needs to be programmed
 	 * in IRQC registers to enable a given gpio pin as interrupt.
 	 */
 	if (hwirq > IRQC_IRQ_COUNT) {
 		tint = TINT_EXTRACT_GPIOINT(hwirq);
 		hwirq = TINT_EXTRACT_HWIRQ(hwirq);

 		if (hwirq < IRQC_TINT_START)
 			return -EINVAL;
 	}

 	if (hwirq > (IRQC_NUM_IRQ - 1))
 		return -EINVAL;

 	ret = irq_domain_set_hwirq_and_chip(domain, virq, hwirq, &irqc_chip,
 					    (void *)(uintptr_t)tint);
 	if (ret)
 		return ret;

 	return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, &priv->fwspec[hwirq]);
 }

 static const struct irq_domain_ops rzg2l_irqc_domain_ops = {
 	.alloc = rzg2l_irqc_alloc,
 	.free = irq_domain_free_irqs_common,
 	.translate = irq_domain_translate_twocell,
 };

 static int rzg2l_irqc_parse_interrupts(struct rzg2l_irqc_priv *priv,
 				       struct device_node *np)
 {
 	struct of_phandle_args map;
 	unsigned int i;
 	int ret;

 	for (i = 0; i < IRQC_NUM_IRQ; i++) {
 		ret = of_irq_parse_one(np, i, &map);
 		if (ret)
 			return ret;
 		of_phandle_args_to_fwspec(np, map.args, map.args_count,
 					  &priv->fwspec[i]);
 	}

 	return 0;
 }

 static int rzg2l_irqc_init(struct device_node *node, struct device_node *parent)
 {
 	struct irq_domain *irq_domain, *parent_domain;
 	struct platform_device *pdev;
 	struct reset_control *resetn;
 	struct rzg2l_irqc_priv *priv;
 	int ret;

 	pdev = of_find_device_by_node(node);
 	if (!pdev)
 		return -ENODEV;

 	parent_domain = irq_find_host(parent);
 	if (!parent_domain) {
 		dev_err(&pdev->dev, "cannot find parent domain\n");
 		return -ENODEV;
 	}

 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;

 	priv->base = devm_of_iomap(&pdev->dev, pdev->dev.of_node, 0, NULL);
 	if (IS_ERR(priv->base))
 		return PTR_ERR(priv->base);

 	ret = rzg2l_irqc_parse_interrupts(priv, node);
 	if (ret) {
 		dev_err(&pdev->dev, "cannot parse interrupts: %d\n", ret);
 		return ret;
 	}

 	resetn = devm_reset_control_get_exclusive(&pdev->dev, NULL);
 	if (IS_ERR(resetn))
 		return PTR_ERR(resetn);

 	ret = reset_control_deassert(resetn);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to deassert resetn pin, %d\n", ret);
 		return ret;
 	}

 	pm_runtime_enable(&pdev->dev);
 	ret = pm_runtime_resume_and_get(&pdev->dev);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "pm_runtime_resume_and_get failed: %d\n", ret);
 		goto pm_disable;
 	}

 	raw_spin_lock_init(&priv->lock);

 	irq_domain = irq_domain_add_hierarchy(parent_domain, 0, IRQC_NUM_IRQ,
 					      node, &rzg2l_irqc_domain_ops,
 					      priv);
 	if (!irq_domain) {
 		dev_err(&pdev->dev, "failed to add irq domain\n");
 		ret = -ENOMEM;
 		goto pm_put;
 	}

 	return 0;

 pm_put:
 	pm_runtime_put(&pdev->dev);
 pm_disable:
 	pm_runtime_disable(&pdev->dev);
 	reset_control_assert(resetn);
 	return ret;
 }

 IRQCHIP_PLATFORM_DRIVER_BEGIN(rzg2l_irqc)
 IRQCHIP_MATCH("renesas,rzg2l-irqc", rzg2l_irqc_init)
 IRQCHIP_PLATFORM_DRIVER_END(rzg2l_irqc)
 MODULE_AUTHOR("Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>");
 MODULE_DESCRIPTION("Renesas RZ/G2L IRQC Driver");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0
	/*
	* Renesas RZ/G2L IRQC Driver
	*
	* Copyright (C) 2022 Renesas Electronics Corporation.
	*
	* Author: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
	*/

	#include <linux/bitfield.h>
	#include <linux/clk.h>
	#include <linux/err.h>
	#include <linux/io.h>
	#include <linux/irqchip.h>
	#include <linux/irqdomain.h>
	#include <linux/of_address.h>
	#include <linux/of_platform.h>
	#include <linux/pm_runtime.h>
	#include <linux/reset.h>
	#include <linux/spinlock.h>

	#define IRQC_IRQ_START 1
	#define IRQC_IRQ_COUNT 8
	#define IRQC_TINT_START (IRQC_IRQ_START + IRQC_IRQ_COUNT)
	#define IRQC_TINT_COUNT 32
	#define IRQC_NUM_IRQ (IRQC_TINT_START + IRQC_TINT_COUNT)

	#define ISCR 0x10
	#define IITSR 0x14
	#define TSCR 0x20
	#define TITSR0 0x24
	#define TITSR1 0x28
	#define TITSR0_MAX_INT 16
	#define TITSEL_WIDTH 0x2
	#define TSSR(n) (0x30 + ((n) * 4))
	#define TIEN BIT(7)
	#define TSSEL_SHIFT(n) (8 * (n))
	#define TSSEL_MASK GENMASK(7, 0)
	#define IRQ_MASK 0x3

	#define TSSR_OFFSET(n) ((n) % 4)
	#define TSSR_INDEX(n) ((n) / 4)

	#define TITSR_TITSEL_EDGE_RISING 0
	#define TITSR_TITSEL_EDGE_FALLING 1
	#define TITSR_TITSEL_LEVEL_HIGH 2
	#define TITSR_TITSEL_LEVEL_LOW 3

	#define IITSR_IITSEL(n, sense) ((sense) << ((n) * 2))
	#define IITSR_IITSEL_LEVEL_LOW 0
	#define IITSR_IITSEL_EDGE_FALLING 1
	#define IITSR_IITSEL_EDGE_RISING 2
	#define IITSR_IITSEL_EDGE_BOTH 3
	#define IITSR_IITSEL_MASK(n) IITSR_IITSEL((n), 3)

	#define TINT_EXTRACT_HWIRQ(x) FIELD_GET(GENMASK(15, 0), (x))
	#define TINT_EXTRACT_GPIOINT(x) FIELD_GET(GENMASK(31, 16), (x))

	struct rzg2l_irqc_priv {
	void __iomem *base;
	struct irq_fwspec fwspec[IRQC_NUM_IRQ];
	raw_spinlock_t lock;
	};

	static struct rzg2l_irqc_priv irq_data_to_priv(struct irq_data data)
	{
	return data->domain->host_data;
	}

	static void rzg2l_irq_eoi(struct irq_data *d)
	{
	unsigned int hw_irq = irqd_to_hwirq(d) - IRQC_IRQ_START;
	struct rzg2l_irqc_priv *priv = irq_data_to_priv(d);
	u32 bit = BIT(hw_irq);
	u32 reg;

	reg = readl_relaxed(priv->base + ISCR);
	if (reg & bit)
	writel_relaxed(reg & ~bit, priv->base + ISCR);
	}

	static void rzg2l_tint_eoi(struct irq_data *d)
	{
	unsigned int hw_irq = irqd_to_hwirq(d) - IRQC_TINT_START;
	struct rzg2l_irqc_priv *priv = irq_data_to_priv(d);
	u32 bit = BIT(hw_irq);
	u32 reg;

	reg = readl_relaxed(priv->base + TSCR);
	if (reg & bit)
	writel_relaxed(reg & ~bit, priv->base + TSCR);
	}

	static void rzg2l_irqc_eoi(struct irq_data *d)
	{
	struct rzg2l_irqc_priv *priv = irq_data_to_priv(d);
	unsigned int hw_irq = irqd_to_hwirq(d);

	raw_spin_lock(&priv->lock);
	if (hw_irq >= IRQC_IRQ_START && hw_irq <= IRQC_IRQ_COUNT)
	rzg2l_irq_eoi(d);
	else if (hw_irq >= IRQC_TINT_START && hw_irq < IRQC_NUM_IRQ)
	rzg2l_tint_eoi(d);
	raw_spin_unlock(&priv->lock);
	irq_chip_eoi_parent(d);
	}

	static void rzg2l_irqc_irq_disable(struct irq_data *d)
	{
	unsigned int hw_irq = irqd_to_hwirq(d);

	if (hw_irq >= IRQC_TINT_START && hw_irq < IRQC_NUM_IRQ) {
	struct rzg2l_irqc_priv *priv = irq_data_to_priv(d);
	u32 offset = hw_irq - IRQC_TINT_START;
	u32 tssr_offset = TSSR_OFFSET(offset);
	u8 tssr_index = TSSR_INDEX(offset);
	u32 reg;

	raw_spin_lock(&priv->lock);
	reg = readl_relaxed(priv->base + TSSR(tssr_index));
	reg &= ~(TSSEL_MASK << tssr_offset);
	writel_relaxed(reg, priv->base + TSSR(tssr_index));
	raw_spin_unlock(&priv->lock);
	}
	irq_chip_disable_parent(d);
	}

	static void rzg2l_irqc_irq_enable(struct irq_data *d)
	{
	unsigned int hw_irq = irqd_to_hwirq(d);

	if (hw_irq >= IRQC_TINT_START && hw_irq < IRQC_NUM_IRQ) {
	struct rzg2l_irqc_priv *priv = irq_data_to_priv(d);
	unsigned long tint = (uintptr_t)d->chip_data;
	u32 offset = hw_irq - IRQC_TINT_START;
	u32 tssr_offset = TSSR_OFFSET(offset);
	u8 tssr_index = TSSR_INDEX(offset);
	u32 reg;

	raw_spin_lock(&priv->lock);
	reg = readl_relaxed(priv->base + TSSR(tssr_index));
	reg \|= (TIEN \| tint) << TSSEL_SHIFT(tssr_offset);
	writel_relaxed(reg, priv->base + TSSR(tssr_index));
	raw_spin_unlock(&priv->lock);
	}
	irq_chip_enable_parent(d);
	}

	static int rzg2l_irq_set_type(struct irq_data *d, unsigned int type)
	{
	unsigned int hw_irq = irqd_to_hwirq(d) - IRQC_IRQ_START;
	struct rzg2l_irqc_priv *priv = irq_data_to_priv(d);
	u16 sense, tmp;

	switch (type & IRQ_TYPE_SENSE_MASK) {
	case IRQ_TYPE_LEVEL_LOW:
	sense = IITSR_IITSEL_LEVEL_LOW;
	break;

	case IRQ_TYPE_EDGE_FALLING:
	sense = IITSR_IITSEL_EDGE_FALLING;
	break;

	case IRQ_TYPE_EDGE_RISING:
	sense = IITSR_IITSEL_EDGE_RISING;
	break;

	case IRQ_TYPE_EDGE_BOTH:
	sense = IITSR_IITSEL_EDGE_BOTH;
	break;

	default:
	return -EINVAL;
	}

	raw_spin_lock(&priv->lock);
	tmp = readl_relaxed(priv->base + IITSR);
	tmp &= ~IITSR_IITSEL_MASK(hw_irq);
	tmp \|= IITSR_IITSEL(hw_irq, sense);
	writel_relaxed(tmp, priv->base + IITSR);
	raw_spin_unlock(&priv->lock);

	return 0;
	}

	static int rzg2l_tint_set_edge(struct irq_data *d, unsigned int type)
	{
	struct rzg2l_irqc_priv *priv = irq_data_to_priv(d);
	unsigned int hwirq = irqd_to_hwirq(d);
	u32 titseln = hwirq - IRQC_TINT_START;
	u32 offset;
	u8 sense;
	u32 reg;

	switch (type & IRQ_TYPE_SENSE_MASK) {
	case IRQ_TYPE_EDGE_RISING:
	sense = TITSR_TITSEL_EDGE_RISING;
	break;

	case IRQ_TYPE_EDGE_FALLING:
	sense = TITSR_TITSEL_EDGE_FALLING;
	break;

	default:
	return -EINVAL;
	}

	offset = TITSR0;
	if (titseln >= TITSR0_MAX_INT) {
	titseln -= TITSR0_MAX_INT;
	offset = TITSR1;
	}

	raw_spin_lock(&priv->lock);
	reg = readl_relaxed(priv->base + offset);
	reg &= ~(IRQ_MASK << (titseln * TITSEL_WIDTH));
	reg \|= sense << (titseln * TITSEL_WIDTH);
	writel_relaxed(reg, priv->base + offset);
	raw_spin_unlock(&priv->lock);

	return 0;
	}

	static int rzg2l_irqc_set_type(struct irq_data *d, unsigned int type)
	{
	unsigned int hw_irq = irqd_to_hwirq(d);
	int ret = -EINVAL;

	if (hw_irq >= IRQC_IRQ_START && hw_irq <= IRQC_IRQ_COUNT)
	ret = rzg2l_irq_set_type(d, type);
	else if (hw_irq >= IRQC_TINT_START && hw_irq < IRQC_NUM_IRQ)
	ret = rzg2l_tint_set_edge(d, type);
	if (ret)
	return ret;

	return irq_chip_set_type_parent(d, IRQ_TYPE_LEVEL_HIGH);
	}

	static const struct irq_chip irqc_chip = {
	.name = "rzg2l-irqc",
	.irq_eoi = rzg2l_irqc_eoi,
	.irq_mask = irq_chip_mask_parent,
	.irq_unmask = irq_chip_unmask_parent,
	.irq_disable = rzg2l_irqc_irq_disable,
	.irq_enable = rzg2l_irqc_irq_enable,
	.irq_get_irqchip_state = irq_chip_get_parent_state,
	.irq_set_irqchip_state = irq_chip_set_parent_state,
	.irq_retrigger = irq_chip_retrigger_hierarchy,
	.irq_set_type = rzg2l_irqc_set_type,
	.flags = IRQCHIP_MASK_ON_SUSPEND \|
	IRQCHIP_SET_TYPE_MASKED \|
	IRQCHIP_SKIP_SET_WAKE,
	};

	static int rzg2l_irqc_alloc(struct irq_domain *domain, unsigned int virq,
	unsigned int nr_irqs, void *arg)
	{
	struct rzg2l_irqc_priv *priv = domain->host_data;
	unsigned long tint = 0;
	irq_hw_number_t hwirq;
	unsigned int type;
	int ret;

	ret = irq_domain_translate_twocell(domain, arg, &hwirq, &type);
	if (ret)
	return ret;

	/*
	* For TINT interrupts ie where pinctrl driver is child of irqc domain
	* the hwirq and TINT are encoded in fwspec->param[0].
	* hwirq for TINT range from 9-40, hwirq is embedded 0-15 bits and TINT
	* from 16-31 bits. TINT from the pinctrl driver needs to be programmed
	* in IRQC registers to enable a given gpio pin as interrupt.
	*/
	if (hwirq > IRQC_IRQ_COUNT) {
	tint = TINT_EXTRACT_GPIOINT(hwirq);
	hwirq = TINT_EXTRACT_HWIRQ(hwirq);

	if (hwirq < IRQC_TINT_START)
	return -EINVAL;
	}

	if (hwirq > (IRQC_NUM_IRQ - 1))
	return -EINVAL;

	ret = irq_domain_set_hwirq_and_chip(domain, virq, hwirq, &irqc_chip,
	(void *)(uintptr_t)tint);
	if (ret)
	return ret;

	return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, &priv->fwspec[hwirq]);
	}

	static const struct irq_domain_ops rzg2l_irqc_domain_ops = {
	.alloc = rzg2l_irqc_alloc,
	.free = irq_domain_free_irqs_common,
	.translate = irq_domain_translate_twocell,
	};

	static int rzg2l_irqc_parse_interrupts(struct rzg2l_irqc_priv *priv,
	struct device_node *np)
	{
	struct of_phandle_args map;
	unsigned int i;
	int ret;

	for (i = 0; i < IRQC_NUM_IRQ; i++) {
	ret = of_irq_parse_one(np, i, &map);
	if (ret)
	return ret;
	of_phandle_args_to_fwspec(np, map.args, map.args_count,
	&priv->fwspec[i]);
	}

	return 0;
	}

	static int rzg2l_irqc_init(struct device_node node, struct device_node parent)
	{
	struct irq_domain irq_domain, parent_domain;
	struct platform_device *pdev;
	struct reset_control *resetn;
	struct rzg2l_irqc_priv *priv;
	int ret;

	pdev = of_find_device_by_node(node);
	if (!pdev)
	return -ENODEV;

	parent_domain = irq_find_host(parent);
	if (!parent_domain) {
	dev_err(&pdev->dev, "cannot find parent domain\n");
	return -ENODEV;
	}

	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
	return -ENOMEM;

	priv->base = devm_of_iomap(&pdev->dev, pdev->dev.of_node, 0, NULL);
	if (IS_ERR(priv->base))
	return PTR_ERR(priv->base);

	ret = rzg2l_irqc_parse_interrupts(priv, node);
	if (ret) {
	dev_err(&pdev->dev, "cannot parse interrupts: %d\n", ret);
	return ret;
	}

	resetn = devm_reset_control_get_exclusive(&pdev->dev, NULL);
	if (IS_ERR(resetn))
	return PTR_ERR(resetn);

	ret = reset_control_deassert(resetn);
	if (ret) {
	dev_err(&pdev->dev, "failed to deassert resetn pin, %d\n", ret);
	return ret;
	}

	pm_runtime_enable(&pdev->dev);
	ret = pm_runtime_resume_and_get(&pdev->dev);
	if (ret < 0) {
	dev_err(&pdev->dev, "pm_runtime_resume_and_get failed: %d\n", ret);
	goto pm_disable;
	}

	raw_spin_lock_init(&priv->lock);

	irq_domain = irq_domain_add_hierarchy(parent_domain, 0, IRQC_NUM_IRQ,
	node, &rzg2l_irqc_domain_ops,
	priv);
	if (!irq_domain) {
	dev_err(&pdev->dev, "failed to add irq domain\n");
	ret = -ENOMEM;
	goto pm_put;
	}

	return 0;

	pm_put:
	pm_runtime_put(&pdev->dev);
	pm_disable:
	pm_runtime_disable(&pdev->dev);
	reset_control_assert(resetn);
	return ret;
	}

	IRQCHIP_PLATFORM_DRIVER_BEGIN(rzg2l_irqc)
	IRQCHIP_MATCH("renesas,rzg2l-irqc", rzg2l_irqc_init)
	IRQCHIP_PLATFORM_DRIVER_END(rzg2l_irqc)
	MODULE_AUTHOR("Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>");
	MODULE_DESCRIPTION("Renesas RZ/G2L IRQC Driver");
	MODULE_LICENSE("GPL");