[linux-2.6-block.git] / drivers / irqchip / irq-mbigen.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2015 Hisilicon Limited, All Rights Reserved.
 * Author: Jun Ma <majun258@huawei.com>
 * Author: Yun Wu <wuyun.wu@huawei.com>
 */

#include <linux/acpi.h>
#include <linux/interrupt.h>
#include <linux/irqchip.h>
#include <linux/module.h>
#include <linux/msi.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

/* Interrupt numbers per mbigen node supported */
#define IRQS_PER_MBIGEN_NODE		128

/* 64 irqs (Pin0-pin63) are reserved for each mbigen chip */
#define RESERVED_IRQ_PER_MBIGEN_CHIP	64

/* The maximum IRQ pin number of mbigen chip(start from 0) */
#define MAXIMUM_IRQ_PIN_NUM		1407

/**
 * In mbigen vector register
 * bit[21:12]:	event id value
 * bit[11:0]:	device id
 */
#define IRQ_EVENT_ID_SHIFT		12
#define IRQ_EVENT_ID_MASK		0x3ff

/* register range of each mbigen node */
#define MBIGEN_NODE_OFFSET		0x1000

/* offset of vector register in mbigen node */
#define REG_MBIGEN_VEC_OFFSET		0x200

/**
 * offset of clear register in mbigen node
 * This register is used to clear the status
 * of interrupt
 */
#define REG_MBIGEN_CLEAR_OFFSET		0xa000

/**
 * offset of interrupt type register
 * This register is used to configure interrupt
 * trigger type
 */
#define REG_MBIGEN_TYPE_OFFSET		0x0

/**
 * struct mbigen_device - holds the information of mbigen device.
 *
 * @pdev:		pointer to the platform device structure of mbigen chip.
 * @base:		mapped address of this mbigen chip.
 */
struct mbigen_device {
	struct platform_device	*pdev;
	void __iomem		*base;
};

static inline unsigned int get_mbigen_vec_reg(irq_hw_number_t hwirq)
{
	unsigned int nid, pin;

	hwirq -= RESERVED_IRQ_PER_MBIGEN_CHIP;
	nid = hwirq / IRQS_PER_MBIGEN_NODE + 1;
	pin = hwirq % IRQS_PER_MBIGEN_NODE;

	return pin * 4 + nid * MBIGEN_NODE_OFFSET
			+ REG_MBIGEN_VEC_OFFSET;
}

static inline void get_mbigen_type_reg(irq_hw_number_t hwirq,
					u32 *mask, u32 *addr)
{
	unsigned int nid, irq_ofst, ofst;

	hwirq -= RESERVED_IRQ_PER_MBIGEN_CHIP;
	nid = hwirq / IRQS_PER_MBIGEN_NODE + 1;
	irq_ofst = hwirq % IRQS_PER_MBIGEN_NODE;

	*mask = 1 << (irq_ofst % 32);
	ofst = irq_ofst / 32 * 4;

	*addr = ofst + nid * MBIGEN_NODE_OFFSET
		+ REG_MBIGEN_TYPE_OFFSET;
}

static inline void get_mbigen_clear_reg(irq_hw_number_t hwirq,
					u32 *mask, u32 *addr)
{
	unsigned int ofst = (hwirq / 32) * 4;

	*mask = 1 << (hwirq % 32);
	*addr = ofst + REG_MBIGEN_CLEAR_OFFSET;
}

static void mbigen_eoi_irq(struct irq_data *data)
{
	void __iomem *base = data->chip_data;
	u32 mask, addr;

	get_mbigen_clear_reg(data->hwirq, &mask, &addr);

	writel_relaxed(mask, base + addr);

	irq_chip_eoi_parent(data);
}

static int mbigen_set_type(struct irq_data *data, unsigned int type)
{
	void __iomem *base = data->chip_data;
	u32 mask, addr, val;

	if (type != IRQ_TYPE_LEVEL_HIGH && type != IRQ_TYPE_EDGE_RISING)
		return -EINVAL;

	get_mbigen_type_reg(data->hwirq, &mask, &addr);

	val = readl_relaxed(base + addr);

	if (type == IRQ_TYPE_LEVEL_HIGH)
		val |= mask;
	else
		val &= ~mask;

	writel_relaxed(val, base + addr);

	return 0;
}

static struct irq_chip mbigen_irq_chip = {
	.name =			"mbigen-v2",
	.irq_mask =		irq_chip_mask_parent,
	.irq_unmask =		irq_chip_unmask_parent,
	.irq_eoi =		mbigen_eoi_irq,
	.irq_set_type =		mbigen_set_type,
	.irq_set_affinity =	irq_chip_set_affinity_parent,
};

static void mbigen_write_msg(struct msi_desc *desc, struct msi_msg *msg)
{
	struct irq_data *d = irq_get_irq_data(desc->irq);
	void __iomem *base = d->chip_data;
	u32 val;

	if (!msg->address_lo && !msg->address_hi)
		return;
 
	base += get_mbigen_vec_reg(d->hwirq);
	val = readl_relaxed(base);

	val &= ~(IRQ_EVENT_ID_MASK << IRQ_EVENT_ID_SHIFT);
	val |= (msg->data << IRQ_EVENT_ID_SHIFT);

	/* The address of doorbell is encoded in mbigen register by default
	 * So,we don't need to program the doorbell address at here
	 */
	writel_relaxed(val, base);
}

static int mbigen_domain_translate(struct irq_domain *d,
				    struct irq_fwspec *fwspec,
				    unsigned long *hwirq,
				    unsigned int *type)
{
	if (is_of_node(fwspec->fwnode) || is_acpi_device_node(fwspec->fwnode)) {
		if (fwspec->param_count != 2)
			return -EINVAL;

		if ((fwspec->param[0] > MAXIMUM_IRQ_PIN_NUM) ||
			(fwspec->param[0] < RESERVED_IRQ_PER_MBIGEN_CHIP))
			return -EINVAL;
		else
			*hwirq = fwspec->param[0];

		/* If there is no valid irq type, just use the default type */
		if ((fwspec->param[1] == IRQ_TYPE_EDGE_RISING) ||
			(fwspec->param[1] == IRQ_TYPE_LEVEL_HIGH))
			*type = fwspec->param[1];
		else
			return -EINVAL;

		return 0;
	}
	return -EINVAL;
}

static int mbigen_irq_domain_alloc(struct irq_domain *domain,
					unsigned int virq,
					unsigned int nr_irqs,
					void *args)
{
	struct irq_fwspec *fwspec = args;
	irq_hw_number_t hwirq;
	unsigned int type;
	struct mbigen_device *mgn_chip;
	int i, err;

	err = mbigen_domain_translate(domain, fwspec, &hwirq, &type);
	if (err)
		return err;

	err = platform_msi_domain_alloc(domain, virq, nr_irqs);
	if (err)
		return err;

	mgn_chip = platform_msi_get_host_data(domain);

	for (i = 0; i < nr_irqs; i++)
		irq_domain_set_hwirq_and_chip(domain, virq + i, hwirq + i,
				      &mbigen_irq_chip, mgn_chip->base);

	return 0;
}

static const struct irq_domain_ops mbigen_domain_ops = {
	.translate	= mbigen_domain_translate,
	.alloc		= mbigen_irq_domain_alloc,
	.free		= irq_domain_free_irqs_common,
};

static int mbigen_of_create_domain(struct platform_device *pdev,
				   struct mbigen_device *mgn_chip)
{
	struct device *parent;
	struct platform_device *child;
	struct irq_domain *domain;
	struct device_node *np;
	u32 num_pins;

	for_each_child_of_node(pdev->dev.of_node, np) {
		if (!of_property_read_bool(np, "interrupt-controller"))
			continue;

		parent = platform_bus_type.dev_root;
		child = of_platform_device_create(np, NULL, parent);
		if (!child)
			return -ENOMEM;

		if (of_property_read_u32(child->dev.of_node, "num-pins",
					 &num_pins) < 0) {
			dev_err(&pdev->dev, "No num-pins property\n");
			return -EINVAL;
		}

		domain = platform_msi_create_device_domain(&child->dev, num_pins,
							   mbigen_write_msg,
							   &mbigen_domain_ops,
							   mgn_chip);
		if (!domain)
			return -ENOMEM;
	}

	return 0;
}

#ifdef CONFIG_ACPI
static int mbigen_acpi_create_domain(struct platform_device *pdev,
				     struct mbigen_device *mgn_chip)
{
	struct irq_domain *domain;
	u32 num_pins = 0;
	int ret;

	/*
	 * "num-pins" is the total number of interrupt pins implemented in
	 * this mbigen instance, and mbigen is an interrupt controller
	 * connected to ITS  converting wired interrupts into MSI, so we
	 * use "num-pins" to alloc MSI vectors which are needed by client
	 * devices connected to it.
	 *
	 * Here is the DSDT device node used for mbigen in firmware:
	 *	Device(MBI0) {
	 *		Name(_HID, "HISI0152")
	 *		Name(_UID, Zero)
	 *		Name(_CRS, ResourceTemplate() {
	 *			Memory32Fixed(ReadWrite, 0xa0080000, 0x10000)
	 *		})
	 *
	 *		Name(_DSD, Package () {
	 *			ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
	 *			Package () {
	 *				Package () {"num-pins", 378}
	 *			}
	 *		})
	 *	}
	 */
	ret = device_property_read_u32(&pdev->dev, "num-pins", &num_pins);
	if (ret || num_pins == 0)
		return -EINVAL;

	domain = platform_msi_create_device_domain(&pdev->dev, num_pins,
						   mbigen_write_msg,
						   &mbigen_domain_ops,
						   mgn_chip);
	if (!domain)
		return -ENOMEM;

	return 0;
}
#else
static inline int mbigen_acpi_create_domain(struct platform_device *pdev,
					    struct mbigen_device *mgn_chip)
{
	return -ENODEV;
}
#endif

static int mbigen_device_probe(struct platform_device *pdev)
{
	struct mbigen_device *mgn_chip;
	struct resource *res;
	int err;

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

	mgn_chip->pdev = pdev;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res)
		return -EINVAL;

	mgn_chip->base = devm_ioremap(&pdev->dev, res->start,
				      resource_size(res));
	if (!mgn_chip->base) {
		dev_err(&pdev->dev, "failed to ioremap %pR\n", res);
		return -ENOMEM;
	}

	if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node)
		err = mbigen_of_create_domain(pdev, mgn_chip);
	else if (ACPI_COMPANION(&pdev->dev))
		err = mbigen_acpi_create_domain(pdev, mgn_chip);
	else
		err = -EINVAL;

	if (err) {
		dev_err(&pdev->dev, "Failed to create mbi-gen irqdomain\n");
		return err;
	}

	platform_set_drvdata(pdev, mgn_chip);
	return 0;
}

static const struct of_device_id mbigen_of_match[] = {
	{ .compatible = "hisilicon,mbigen-v2" },
	{ /* END */ }
};
MODULE_DEVICE_TABLE(of, mbigen_of_match);

static const struct acpi_device_id mbigen_acpi_match[] = {
	{ "HISI0152", 0 },
	{}
};
MODULE_DEVICE_TABLE(acpi, mbigen_acpi_match);

static struct platform_driver mbigen_platform_driver = {
	.driver = {
		.name		= "Hisilicon MBIGEN-V2",
		.of_match_table	= mbigen_of_match,
		.acpi_match_table = ACPI_PTR(mbigen_acpi_match),
	},
	.probe			= mbigen_device_probe,
};

module_platform_driver(mbigen_platform_driver);

MODULE_AUTHOR("Jun Ma <majun258@huawei.com>");
MODULE_AUTHOR("Yun Wu <wuyun.wu@huawei.com>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Hisilicon MBI Generator driver");
Commit	Line	Data
caab277b	1	// SPDX-License-Identifier: GPL-2.0-only
717c3dbc MJ	2	/*
	3	* Copyright (C) 2015 Hisilicon Limited, All Rights Reserved.
	4	* Author: Jun Ma <majun258@huawei.com>
	5	* Author: Yun Wu <wuyun.wu@huawei.com>
717c3dbc MJ	6	*/
717c3dbc MJ	7
f907c515	8	#include <linux/acpi.h>
9650c60e MJ	9	#include <linux/interrupt.h>
9650c60e MJ	10	#include <linux/irqchip.h>
717c3dbc	11	#include <linux/module.h>
9650c60e	12	#include <linux/msi.h>
717c3dbc MJ	13	#include <linux/of_address.h>
	14	#include <linux/of_irq.h>
	15	#include <linux/of_platform.h>
	16	#include <linux/platform_device.h>
	17	#include <linux/slab.h>
	18
9650c60e MJ	19	/* Interrupt numbers per mbigen node supported */
	20	#define IRQS_PER_MBIGEN_NODE 128
	21
	22	/* 64 irqs (Pin0-pin63) are reserved for each mbigen chip */
	23	#define RESERVED_IRQ_PER_MBIGEN_CHIP 64
	24
	25	/* The maximum IRQ pin number of mbigen chip(start from 0) */
	26	#define MAXIMUM_IRQ_PIN_NUM 1407
	27
	28	/**
	29	* In mbigen vector register
	30	* bit[21:12]: event id value
	31	* bit[11:0]: device id
	32	*/
	33	#define IRQ_EVENT_ID_SHIFT 12
	34	#define IRQ_EVENT_ID_MASK 0x3ff
	35
	36	/* register range of each mbigen node */
	37	#define MBIGEN_NODE_OFFSET 0x1000
	38
	39	/* offset of vector register in mbigen node */
	40	#define REG_MBIGEN_VEC_OFFSET 0x200
	41
a6c2f87b MJ	42	/**
	43	* offset of clear register in mbigen node
	44	* This register is used to clear the status
	45	* of interrupt
	46	*/
	47	#define REG_MBIGEN_CLEAR_OFFSET 0xa000
	48
	49	/**
	50	* offset of interrupt type register
	51	* This register is used to configure interrupt
	52	* trigger type
	53	*/
	54	#define REG_MBIGEN_TYPE_OFFSET 0x0
	55
717c3dbc MJ	56	/**
	57	* struct mbigen_device - holds the information of mbigen device.
	58	*
	59	* @pdev: pointer to the platform device structure of mbigen chip.
	60	* @base: mapped address of this mbigen chip.
	61	*/
	62	struct mbigen_device {
	63	struct platform_device *pdev;
	64	void __iomem *base;
	65	};
	66
9650c60e MJ	67	static inline unsigned int get_mbigen_vec_reg(irq_hw_number_t hwirq)
	68	{
	69	unsigned int nid, pin;
	70
	71	hwirq -= RESERVED_IRQ_PER_MBIGEN_CHIP;
	72	nid = hwirq / IRQS_PER_MBIGEN_NODE + 1;
	73	pin = hwirq % IRQS_PER_MBIGEN_NODE;
	74
	75	return pin * 4 + nid * MBIGEN_NODE_OFFSET
	76	+ REG_MBIGEN_VEC_OFFSET;
	77	}
	78
a6c2f87b MJ	79	static inline void get_mbigen_type_reg(irq_hw_number_t hwirq,
	80	u32 mask, u32 addr)
	81	{
	82	unsigned int nid, irq_ofst, ofst;
	83
	84	hwirq -= RESERVED_IRQ_PER_MBIGEN_CHIP;
	85	nid = hwirq / IRQS_PER_MBIGEN_NODE + 1;
	86	irq_ofst = hwirq % IRQS_PER_MBIGEN_NODE;
	87
	88	*mask = 1 << (irq_ofst % 32);
	89	ofst = irq_ofst / 32 * 4;
	90
	91	addr = ofst + nid MBIGEN_NODE_OFFSET
	92	+ REG_MBIGEN_TYPE_OFFSET;
	93	}
	94
	95	static inline void get_mbigen_clear_reg(irq_hw_number_t hwirq,
	96	u32 mask, u32 addr)
	97	{
9459a04b	98	unsigned int ofst = (hwirq / 32) * 4;
a6c2f87b MJ	99
	100	*mask = 1 << (hwirq % 32);
	101	*addr = ofst + REG_MBIGEN_CLEAR_OFFSET;
	102	}
	103
	104	static void mbigen_eoi_irq(struct irq_data *data)
	105	{
	106	void __iomem *base = data->chip_data;
	107	u32 mask, addr;
	108
	109	get_mbigen_clear_reg(data->hwirq, &mask, &addr);
	110
	111	writel_relaxed(mask, base + addr);
	112
	113	irq_chip_eoi_parent(data);
	114	}
	115
	116	static int mbigen_set_type(struct irq_data *data, unsigned int type)
	117	{
	118	void __iomem *base = data->chip_data;
	119	u32 mask, addr, val;
	120
	121	if (type != IRQ_TYPE_LEVEL_HIGH && type != IRQ_TYPE_EDGE_RISING)
	122	return -EINVAL;
	123
	124	get_mbigen_type_reg(data->hwirq, &mask, &addr);
	125
	126	val = readl_relaxed(base + addr);
	127
	128	if (type == IRQ_TYPE_LEVEL_HIGH)
	129	val \|= mask;
	130	else
	131	val &= ~mask;
	132
	133	writel_relaxed(val, base + addr);
	134
	135	return 0;
	136	}
	137
9650c60e MJ	138	static struct irq_chip mbigen_irq_chip = {
9650c60e MJ	139	.name = "mbigen-v2",
a6c2f87b MJ	140	.irq_mask = irq_chip_mask_parent,
	141	.irq_unmask = irq_chip_unmask_parent,
	142	.irq_eoi = mbigen_eoi_irq,
	143	.irq_set_type = mbigen_set_type,
	144	.irq_set_affinity = irq_chip_set_affinity_parent,
9650c60e MJ	145	};
	146
	147	static void mbigen_write_msg(struct msi_desc desc, struct msi_msg msg)
	148	{
	149	struct irq_data *d = irq_get_irq_data(desc->irq);
	150	void __iomem *base = d->chip_data;
	151	u32 val;
	152
fca269f2 JC	153	if (!msg->address_lo && !msg->address_hi)
	154	return;
	155
9650c60e MJ	156	base += get_mbigen_vec_reg(d->hwirq);
	157	val = readl_relaxed(base);
	158
	159	val &= ~(IRQ_EVENT_ID_MASK << IRQ_EVENT_ID_SHIFT);
	160	val \|= (msg->data << IRQ_EVENT_ID_SHIFT);
	161
	162	/* The address of doorbell is encoded in mbigen register by default
	163	* So,we don't need to program the doorbell address at here
	164	*/
	165	writel_relaxed(val, base);
	166	}
	167
	168	static int mbigen_domain_translate(struct irq_domain *d,
	169	struct irq_fwspec *fwspec,
	170	unsigned long *hwirq,
	171	unsigned int *type)
	172	{
f907c515	173	if (is_of_node(fwspec->fwnode) \|\| is_acpi_device_node(fwspec->fwnode)) {
9650c60e MJ	174	if (fwspec->param_count != 2)
	175	return -EINVAL;
	176
	177	if ((fwspec->param[0] > MAXIMUM_IRQ_PIN_NUM) \|\|
	178	(fwspec->param[0] < RESERVED_IRQ_PER_MBIGEN_CHIP))
	179	return -EINVAL;
	180	else
	181	*hwirq = fwspec->param[0];
	182
	183	/* If there is no valid irq type, just use the default type */
	184	if ((fwspec->param[1] == IRQ_TYPE_EDGE_RISING) \|\|
	185	(fwspec->param[1] == IRQ_TYPE_LEVEL_HIGH))
	186	*type = fwspec->param[1];
	187	else
	188	return -EINVAL;
	189
	190	return 0;
	191	}
	192	return -EINVAL;
	193	}
	194
	195	static int mbigen_irq_domain_alloc(struct irq_domain *domain,
	196	unsigned int virq,
	197	unsigned int nr_irqs,
	198	void *args)
	199	{
	200	struct irq_fwspec *fwspec = args;
	201	irq_hw_number_t hwirq;
	202	unsigned int type;
	203	struct mbigen_device *mgn_chip;
	204	int i, err;
	205
	206	err = mbigen_domain_translate(domain, fwspec, &hwirq, &type);
	207	if (err)
	208	return err;
	209
	210	err = platform_msi_domain_alloc(domain, virq, nr_irqs);
	211	if (err)
	212	return err;
	213
	214	mgn_chip = platform_msi_get_host_data(domain);
	215
	216	for (i = 0; i < nr_irqs; i++)
	217	irq_domain_set_hwirq_and_chip(domain, virq + i, hwirq + i,
	218	&mbigen_irq_chip, mgn_chip->base);
	219
	220	return 0;
	221	}
	222
e183c2a3	223	static const struct irq_domain_ops mbigen_domain_ops = {
9650c60e MJ	224	.translate = mbigen_domain_translate,
	225	.alloc = mbigen_irq_domain_alloc,
	226	.free = irq_domain_free_irqs_common,
	227	};
	228
76e1f77f KW	229	static int mbigen_of_create_domain(struct platform_device *pdev,
76e1f77f KW	230	struct mbigen_device *mgn_chip)
717c3dbc	231	{
76e1f77f	232	struct device *parent;
ed2a1002	233	struct platform_device *child;
9650c60e	234	struct irq_domain *domain;
ed2a1002	235	struct device_node *np;
9650c60e	236	u32 num_pins;
717c3dbc	237
ed2a1002 M	238	for_each_child_of_node(pdev->dev.of_node, np) {
	239	if (!of_property_read_bool(np, "interrupt-controller"))
	240	continue;
9650c60e	241
ed2a1002 M	242	parent = platform_bus_type.dev_root;
ed2a1002 M	243	child = of_platform_device_create(np, NULL, parent);
086eec2d DC	244	if (!child)
086eec2d DC	245	return -ENOMEM;
9650c60e	246
ed2a1002 M	247	if (of_property_read_u32(child->dev.of_node, "num-pins",
	248	&num_pins) < 0) {
	249	dev_err(&pdev->dev, "No num-pins property\n");
	250	return -EINVAL;
	251	}
	252
	253	domain = platform_msi_create_device_domain(&child->dev, num_pins,
	254	mbigen_write_msg,
	255	&mbigen_domain_ops,
	256	mgn_chip);
	257	if (!domain)
	258	return -ENOMEM;
	259	}
9650c60e	260
76e1f77f KW	261	return 0;
	262	}
	263
f907c515 HG	264	#ifdef CONFIG_ACPI
	265	static int mbigen_acpi_create_domain(struct platform_device *pdev,
	266	struct mbigen_device *mgn_chip)
	267	{
	268	struct irq_domain *domain;
	269	u32 num_pins = 0;
	270	int ret;
	271
	272	/*
	273	* "num-pins" is the total number of interrupt pins implemented in
	274	* this mbigen instance, and mbigen is an interrupt controller
	275	* connected to ITS converting wired interrupts into MSI, so we
	276	* use "num-pins" to alloc MSI vectors which are needed by client
	277	* devices connected to it.
	278	*
	279	* Here is the DSDT device node used for mbigen in firmware:
	280	* Device(MBI0) {
	281	* Name(_HID, "HISI0152")
	282	* Name(_UID, Zero)
	283	* Name(_CRS, ResourceTemplate() {
	284	* Memory32Fixed(ReadWrite, 0xa0080000, 0x10000)
	285	* })
	286	*
	287	* Name(_DSD, Package () {
	288	* ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
	289	* Package () {
	290	* Package () {"num-pins", 378}
	291	* }
	292	* })
	293	* }
	294	*/
	295	ret = device_property_read_u32(&pdev->dev, "num-pins", &num_pins);
	296	if (ret \|\| num_pins == 0)
	297	return -EINVAL;
	298
	299	domain = platform_msi_create_device_domain(&pdev->dev, num_pins,
	300	mbigen_write_msg,
	301	&mbigen_domain_ops,
	302	mgn_chip);
	303	if (!domain)
	304	return -ENOMEM;
	305
	306	return 0;
	307	}
	308	#else
	309	static inline int mbigen_acpi_create_domain(struct platform_device *pdev,
	310	struct mbigen_device *mgn_chip)
	311	{
	312	return -ENODEV;
	313	}
	314	#endif
	315
76e1f77f KW	316	static int mbigen_device_probe(struct platform_device *pdev)
	317	{
	318	struct mbigen_device *mgn_chip;
	319	struct resource *res;
	320	int err;
	321
	322	mgn_chip = devm_kzalloc(&pdev->dev, sizeof(*mgn_chip), GFP_KERNEL);
	323	if (!mgn_chip)
	324	return -ENOMEM;
	325
	326	mgn_chip->pdev = pdev;
	327
	328	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ad7cc3c0 HG	329	if (!res)
	330	return -EINVAL;
	331
5ba9b0a1 HG	332	mgn_chip->base = devm_ioremap(&pdev->dev, res->start,
	333	resource_size(res));
	334	if (!mgn_chip->base) {
	335	dev_err(&pdev->dev, "failed to ioremap %pR\n", res);
	336	return -ENOMEM;
	337	}
76e1f77f	338
f907c515 HG	339	if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node)
	340	err = mbigen_of_create_domain(pdev, mgn_chip);
	341	else if (ACPI_COMPANION(&pdev->dev))
	342	err = mbigen_acpi_create_domain(pdev, mgn_chip);
	343	else
	344	err = -EINVAL;
	345
	346	if (err) {
0bdd0047	347	dev_err(&pdev->dev, "Failed to create mbi-gen irqdomain\n");
76e1f77f	348	return err;
f907c515	349	}
76e1f77f	350
717c3dbc	351	platform_set_drvdata(pdev, mgn_chip);
717c3dbc MJ	352	return 0;
	353	}
	354
	355	static const struct of_device_id mbigen_of_match[] = {
	356	{ .compatible = "hisilicon,mbigen-v2" },
	357	{ /* END */ }
	358	};
	359	MODULE_DEVICE_TABLE(of, mbigen_of_match);
	360
f907c515 HG	361	static const struct acpi_device_id mbigen_acpi_match[] = {
	362	{ "HISI0152", 0 },
	363	{}
	364	};
	365	MODULE_DEVICE_TABLE(acpi, mbigen_acpi_match);
	366
717c3dbc MJ	367	static struct platform_driver mbigen_platform_driver = {
	368	.driver = {
	369	.name = "Hisilicon MBIGEN-V2",
717c3dbc	370	.of_match_table = mbigen_of_match,
f907c515	371	.acpi_match_table = ACPI_PTR(mbigen_acpi_match),
717c3dbc MJ	372	},
	373	.probe = mbigen_device_probe,
	374	};
	375
	376	module_platform_driver(mbigen_platform_driver);
	377
	378	MODULE_AUTHOR("Jun Ma <majun258@huawei.com>");
	379	MODULE_AUTHOR("Yun Wu <wuyun.wu@huawei.com>");
	380	MODULE_LICENSE("GPL");
	381	MODULE_DESCRIPTION("Hisilicon MBI Generator driver");