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

// SPDX-License-Identifier: GPL-2.0
// Copyright 2017 NXP

/*                     INTMUX Block Diagram
 *
 *                               ________________
 * interrupt source #  0  +---->|                |
 *                        |     |                |
 * interrupt source #  1  +++-->|                |
 *            ...         | |   |   channel # 0  |--------->interrupt out # 0
 *            ...         | |   |                |
 *            ...         | |   |                |
 * interrupt source # X-1 +++-->|________________|
 *                        | | |
 *                        | | |
 *                        | | |  ________________
 *                        +---->|                |
 *                        | | | |                |
 *                        | +-->|                |
 *                        | | | |   channel # 1  |--------->interrupt out # 1
 *                        | | +>|                |
 *                        | | | |                |
 *                        | | | |________________|
 *                        | | |
 *                        | | |
 *                        | | |       ...
 *                        | | |       ...
 *                        | | |
 *                        | | |  ________________
 *                        +---->|                |
 *                          | | |                |
 *                          +-->|                |
 *                            | |   channel # N  |--------->interrupt out # N
 *                            +>|                |
 *                              |                |
 *                              |________________|
 *
 *
 * N: Interrupt Channel Instance Number (N=7)
 * X: Interrupt Source Number for each channel (X=32)
 *
 * The INTMUX interrupt multiplexer has 8 channels, each channel receives 32
 * interrupt sources and generates 1 interrupt output.
 *
 */

#include <linux/clk.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
#include <linux/kernel.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/spinlock.h>
#include <linux/pm_runtime.h>

#define CHANIER(n)	(0x10 + (0x40 * n))
#define CHANIPR(n)	(0x20 + (0x40 * n))

#define CHAN_MAX_NUM		0x8

struct intmux_irqchip_data {
	struct irq_chip		chip;
	u32			saved_reg;
	int			chanidx;
	int			irq;
	struct irq_domain	*domain;
};

struct intmux_data {
	raw_spinlock_t			lock;
	void __iomem			*regs;
	struct clk			*ipg_clk;
	int				channum;
	struct intmux_irqchip_data	irqchip_data[];
};

static void imx_intmux_irq_mask(struct irq_data *d)
{
	struct intmux_irqchip_data *irqchip_data = d->chip_data;
	int idx = irqchip_data->chanidx;
	struct intmux_data *data = container_of(irqchip_data, struct intmux_data,
						irqchip_data[idx]);
	unsigned long flags;
	void __iomem *reg;
	u32 val;

	raw_spin_lock_irqsave(&data->lock, flags);
	reg = data->regs + CHANIER(idx);
	val = readl_relaxed(reg);
	/* disable the interrupt source of this channel */
	val &= ~BIT(d->hwirq);
	writel_relaxed(val, reg);
	raw_spin_unlock_irqrestore(&data->lock, flags);
}

static void imx_intmux_irq_unmask(struct irq_data *d)
{
	struct intmux_irqchip_data *irqchip_data = d->chip_data;
	int idx = irqchip_data->chanidx;
	struct intmux_data *data = container_of(irqchip_data, struct intmux_data,
						irqchip_data[idx]);
	unsigned long flags;
	void __iomem *reg;
	u32 val;

	raw_spin_lock_irqsave(&data->lock, flags);
	reg = data->regs + CHANIER(idx);
	val = readl_relaxed(reg);
	/* enable the interrupt source of this channel */
	val |= BIT(d->hwirq);
	writel_relaxed(val, reg);
	raw_spin_unlock_irqrestore(&data->lock, flags);
}

static struct irq_chip imx_intmux_irq_chip = {
	.name		= "intmux",
	.irq_mask	= imx_intmux_irq_mask,
	.irq_unmask	= imx_intmux_irq_unmask,
};

static int imx_intmux_irq_map(struct irq_domain *h, unsigned int irq,
			      irq_hw_number_t hwirq)
{
	struct intmux_irqchip_data *data = h->host_data;

	irq_set_chip_data(irq, data);
	irq_set_chip_and_handler(irq, &data->chip, handle_level_irq);

	return 0;
}

static int imx_intmux_irq_xlate(struct irq_domain *d, struct device_node *node,
				const u32 *intspec, unsigned int intsize,
				unsigned long *out_hwirq, unsigned int *out_type)
{
	struct intmux_irqchip_data *irqchip_data = d->host_data;
	int idx = irqchip_data->chanidx;
	struct intmux_data *data = container_of(irqchip_data, struct intmux_data,
						irqchip_data[idx]);

	/*
	 * two cells needed in interrupt specifier:
	 * the 1st cell: hw interrupt number
	 * the 2nd cell: channel index
	 */
	if (WARN_ON(intsize != 2))
		return -EINVAL;

	if (WARN_ON(intspec[1] >= data->channum))
		return -EINVAL;

	*out_hwirq = intspec[0];
	*out_type = IRQ_TYPE_LEVEL_HIGH;

	return 0;
}

static int imx_intmux_irq_select(struct irq_domain *d, struct irq_fwspec *fwspec,
				 enum irq_domain_bus_token bus_token)
{
	struct intmux_irqchip_data *irqchip_data = d->host_data;

	/* Not for us */
	if (fwspec->fwnode != d->fwnode)
		return false;

	return irqchip_data->chanidx == fwspec->param[1];
}

static const struct irq_domain_ops imx_intmux_domain_ops = {
	.map		= imx_intmux_irq_map,
	.xlate		= imx_intmux_irq_xlate,
	.select		= imx_intmux_irq_select,
};

static void imx_intmux_irq_handler(struct irq_desc *desc)
{
	struct intmux_irqchip_data *irqchip_data = irq_desc_get_handler_data(desc);
	int idx = irqchip_data->chanidx;
	struct intmux_data *data = container_of(irqchip_data, struct intmux_data,
						irqchip_data[idx]);
	unsigned long irqstat;
	int pos, virq;

	chained_irq_enter(irq_desc_get_chip(desc), desc);

	/* read the interrupt source pending status of this channel */
	irqstat = readl_relaxed(data->regs + CHANIPR(idx));

	for_each_set_bit(pos, &irqstat, 32) {
		virq = irq_find_mapping(irqchip_data->domain, pos);
		if (virq)
			generic_handle_irq(virq);
	}

	chained_irq_exit(irq_desc_get_chip(desc), desc);
}

static int imx_intmux_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct irq_domain *domain;
	struct intmux_data *data;
	int channum;
	int i, ret;

	channum = platform_irq_count(pdev);
	if (channum == -EPROBE_DEFER) {
		return -EPROBE_DEFER;
	} else if (channum > CHAN_MAX_NUM) {
		dev_err(&pdev->dev, "supports up to %d multiplex channels\n",
			CHAN_MAX_NUM);
		return -EINVAL;
	}

	data = devm_kzalloc(&pdev->dev, struct_size(data, irqchip_data, channum), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->regs = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(data->regs)) {
		dev_err(&pdev->dev, "failed to initialize reg\n");
		return PTR_ERR(data->regs);
	}

	data->ipg_clk = devm_clk_get(&pdev->dev, "ipg");
	if (IS_ERR(data->ipg_clk))
		return dev_err_probe(&pdev->dev, PTR_ERR(data->ipg_clk),
				     "failed to get ipg clk\n");

	data->channum = channum;
	raw_spin_lock_init(&data->lock);

	pm_runtime_get_noresume(&pdev->dev);
	pm_runtime_set_active(&pdev->dev);
	pm_runtime_enable(&pdev->dev);

	ret = clk_prepare_enable(data->ipg_clk);
	if (ret) {
		dev_err(&pdev->dev, "failed to enable ipg clk: %d\n", ret);
		return ret;
	}

	for (i = 0; i < channum; i++) {
		data->irqchip_data[i].chip = imx_intmux_irq_chip;
		data->irqchip_data[i].chip.parent_device = &pdev->dev;
		data->irqchip_data[i].chanidx = i;

		data->irqchip_data[i].irq = irq_of_parse_and_map(np, i);
		if (data->irqchip_data[i].irq <= 0) {
			ret = -EINVAL;
			dev_err(&pdev->dev, "failed to get irq\n");
			goto out;
		}

		domain = irq_domain_add_linear(np, 32, &imx_intmux_domain_ops,
					       &data->irqchip_data[i]);
		if (!domain) {
			ret = -ENOMEM;
			dev_err(&pdev->dev, "failed to create IRQ domain\n");
			goto out;
		}
		data->irqchip_data[i].domain = domain;

		/* disable all interrupt sources of this channel firstly */
		writel_relaxed(0, data->regs + CHANIER(i));

		irq_set_chained_handler_and_data(data->irqchip_data[i].irq,
						 imx_intmux_irq_handler,
						 &data->irqchip_data[i]);
	}

	platform_set_drvdata(pdev, data);

	/*
	 * Let pm_runtime_put() disable clock.
	 * If CONFIG_PM is not enabled, the clock will stay powered.
	 */
	pm_runtime_put(&pdev->dev);

	return 0;
out:
	clk_disable_unprepare(data->ipg_clk);
	return ret;
}

static int imx_intmux_remove(struct platform_device *pdev)
{
	struct intmux_data *data = platform_get_drvdata(pdev);
	int i;

	for (i = 0; i < data->channum; i++) {
		/* disable all interrupt sources of this channel */
		writel_relaxed(0, data->regs + CHANIER(i));

		irq_set_chained_handler_and_data(data->irqchip_data[i].irq,
						 NULL, NULL);

		irq_domain_remove(data->irqchip_data[i].domain);
	}

	pm_runtime_disable(&pdev->dev);

	return 0;
}

#ifdef CONFIG_PM
static int imx_intmux_runtime_suspend(struct device *dev)
{
	struct intmux_data *data = dev_get_drvdata(dev);
	struct intmux_irqchip_data *irqchip_data;
	int i;

	for (i = 0; i < data->channum; i++) {
		irqchip_data = &data->irqchip_data[i];
		irqchip_data->saved_reg = readl_relaxed(data->regs + CHANIER(i));
	}

	clk_disable_unprepare(data->ipg_clk);

	return 0;
}

static int imx_intmux_runtime_resume(struct device *dev)
{
	struct intmux_data *data = dev_get_drvdata(dev);
	struct intmux_irqchip_data *irqchip_data;
	int ret, i;

	ret = clk_prepare_enable(data->ipg_clk);
	if (ret) {
		dev_err(dev, "failed to enable ipg clk: %d\n", ret);
		return ret;
	}

	for (i = 0; i < data->channum; i++) {
		irqchip_data = &data->irqchip_data[i];
		writel_relaxed(irqchip_data->saved_reg, data->regs + CHANIER(i));
	}

	return 0;
}
#endif

static const struct dev_pm_ops imx_intmux_pm_ops = {
	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
				      pm_runtime_force_resume)
	SET_RUNTIME_PM_OPS(imx_intmux_runtime_suspend,
			   imx_intmux_runtime_resume, NULL)
};

static const struct of_device_id imx_intmux_id[] = {
	{ .compatible = "fsl,imx-intmux", },
	{ /* sentinel */ },
};

static struct platform_driver imx_intmux_driver = {
	.driver = {
		.name = "imx-intmux",
		.of_match_table = imx_intmux_id,
		.pm = &imx_intmux_pm_ops,
	},
	.probe = imx_intmux_probe,
	.remove = imx_intmux_remove,
};
builtin_platform_driver(imx_intmux_driver);
Commit	Line	Data
2fbb1396 JZ	1	// SPDX-License-Identifier: GPL-2.0
	2	// Copyright 2017 NXP
	3
	4	/* INTMUX Block Diagram
	5	*
	6	* ________________
	7	* interrupt source # 0 +---->\| \|
	8	* \| \| \|
	9	* interrupt source # 1 +++-->\| \|
	10	* ... \| \| \| channel # 0 \|--------->interrupt out # 0
	11	* ... \| \| \| \|
	12	* ... \| \| \| \|
	13	* interrupt source # X-1 +++-->\|________________\|
	14	* \| \| \|
	15	* \| \| \|
	16	* \| \| \| ________________
	17	* +---->\| \|
	18	* \| \| \| \| \|
	19	* \| +-->\| \|
	20	* \| \| \| \| channel # 1 \|--------->interrupt out # 1
	21	* \| \| +>\| \|
	22	* \| \| \| \| \|
	23	* \| \| \| \|________________\|
	24	* \| \| \|
	25	* \| \| \|
	26	* \| \| \| ...
	27	* \| \| \| ...
	28	* \| \| \|
	29	* \| \| \| ________________
	30	* +---->\| \|
	31	* \| \| \| \|
	32	* +-->\| \|
	33	* \| \| channel # N \|--------->interrupt out # N
	34	* +>\| \|
	35	* \| \|
	36	* \|________________\|
	37	*
	38	*
	39	* N: Interrupt Channel Instance Number (N=7)
	40	* X: Interrupt Source Number for each channel (X=32)
	41	*
	42	* The INTMUX interrupt multiplexer has 8 channels, each channel receives 32
	43	* interrupt sources and generates 1 interrupt output.
	44	*
	45	*/
	46
	47	#include <linux/clk.h>
	48	#include <linux/interrupt.h>
	49	#include <linux/irq.h>
	50	#include <linux/irqchip/chained_irq.h>
	51	#include <linux/irqdomain.h>
	52	#include <linux/kernel.h>
	53	#include <linux/of_irq.h>
	54	#include <linux/of_platform.h>
	55	#include <linux/spinlock.h>
bb403111	56	#include <linux/pm_runtime.h>
2fbb1396 JZ	57
	58	#define CHANIER(n) (0x10 + (0x40 * n))
	59	#define CHANIPR(n) (0x20 + (0x40 * n))
	60
	61	#define CHAN_MAX_NUM 0x8
	62
	63	struct intmux_irqchip_data {
bb403111 JZ	64	struct irq_chip chip;
bb403111 JZ	65	u32 saved_reg;
2fbb1396 JZ	66	int chanidx;
	67	int irq;
	68	struct irq_domain *domain;
	69	};
	70
	71	struct intmux_data {
	72	raw_spinlock_t lock;
	73	void __iomem *regs;
	74	struct clk *ipg_clk;
	75	int channum;
	76	struct intmux_irqchip_data irqchip_data[];
	77	};
	78
	79	static void imx_intmux_irq_mask(struct irq_data *d)
	80	{
	81	struct intmux_irqchip_data *irqchip_data = d->chip_data;
	82	int idx = irqchip_data->chanidx;
	83	struct intmux_data *data = container_of(irqchip_data, struct intmux_data,
	84	irqchip_data[idx]);
	85	unsigned long flags;
	86	void __iomem *reg;
	87	u32 val;
	88
	89	raw_spin_lock_irqsave(&data->lock, flags);
	90	reg = data->regs + CHANIER(idx);
	91	val = readl_relaxed(reg);
	92	/* disable the interrupt source of this channel */
	93	val &= ~BIT(d->hwirq);
	94	writel_relaxed(val, reg);
	95	raw_spin_unlock_irqrestore(&data->lock, flags);
	96	}
	97
	98	static void imx_intmux_irq_unmask(struct irq_data *d)
	99	{
	100	struct intmux_irqchip_data *irqchip_data = d->chip_data;
	101	int idx = irqchip_data->chanidx;
	102	struct intmux_data *data = container_of(irqchip_data, struct intmux_data,
	103	irqchip_data[idx]);
	104	unsigned long flags;
	105	void __iomem *reg;
	106	u32 val;
	107
	108	raw_spin_lock_irqsave(&data->lock, flags);
	109	reg = data->regs + CHANIER(idx);
	110	val = readl_relaxed(reg);
	111	/* enable the interrupt source of this channel */
	112	val \|= BIT(d->hwirq);
	113	writel_relaxed(val, reg);
	114	raw_spin_unlock_irqrestore(&data->lock, flags);
	115	}
	116
	117	static struct irq_chip imx_intmux_irq_chip = {
	118	.name = "intmux",
	119	.irq_mask = imx_intmux_irq_mask,
	120	.irq_unmask = imx_intmux_irq_unmask,
	121	};
	122
	123	static int imx_intmux_irq_map(struct irq_domain *h, unsigned int irq,
	124	irq_hw_number_t hwirq)
	125	{
bb403111 JZ	126	struct intmux_irqchip_data *data = h->host_data;
	127
	128	irq_set_chip_data(irq, data);
	129	irq_set_chip_and_handler(irq, &data->chip, handle_level_irq);
2fbb1396 JZ	130
	131	return 0;
	132	}
	133
	134	static int imx_intmux_irq_xlate(struct irq_domain d, struct device_node node,
	135	const u32 *intspec, unsigned int intsize,
	136	unsigned long out_hwirq, unsigned int out_type)
	137	{
	138	struct intmux_irqchip_data *irqchip_data = d->host_data;
	139	int idx = irqchip_data->chanidx;
	140	struct intmux_data *data = container_of(irqchip_data, struct intmux_data,
	141	irqchip_data[idx]);
	142
	143	/*
	144	* two cells needed in interrupt specifier:
	145	* the 1st cell: hw interrupt number
	146	* the 2nd cell: channel index
	147	*/
	148	if (WARN_ON(intsize != 2))
	149	return -EINVAL;
	150
	151	if (WARN_ON(intspec[1] >= data->channum))
	152	return -EINVAL;
	153
	154	*out_hwirq = intspec[0];
	155	*out_type = IRQ_TYPE_LEVEL_HIGH;
	156
	157	return 0;
	158	}
	159
	160	static int imx_intmux_irq_select(struct irq_domain d, struct irq_fwspec fwspec,
	161	enum irq_domain_bus_token bus_token)
	162	{
	163	struct intmux_irqchip_data *irqchip_data = d->host_data;
	164
	165	/* Not for us */
	166	if (fwspec->fwnode != d->fwnode)
	167	return false;
	168
	169	return irqchip_data->chanidx == fwspec->param[1];
	170	}
	171
	172	static const struct irq_domain_ops imx_intmux_domain_ops = {
	173	.map = imx_intmux_irq_map,
	174	.xlate = imx_intmux_irq_xlate,
	175	.select = imx_intmux_irq_select,
	176	};
	177
	178	static void imx_intmux_irq_handler(struct irq_desc *desc)
	179	{
	180	struct intmux_irqchip_data *irqchip_data = irq_desc_get_handler_data(desc);
	181	int idx = irqchip_data->chanidx;
	182	struct intmux_data *data = container_of(irqchip_data, struct intmux_data,
	183	irqchip_data[idx]);
	184	unsigned long irqstat;
	185	int pos, virq;
	186
	187	chained_irq_enter(irq_desc_get_chip(desc), desc);
	188
	189	/* read the interrupt source pending status of this channel */
	190	irqstat = readl_relaxed(data->regs + CHANIPR(idx));
	191
	192	for_each_set_bit(pos, &irqstat, 32) {
	193	virq = irq_find_mapping(irqchip_data->domain, pos);
194	if (virq)
195	generic_handle_irq(virq);
196	}
197
198	chained_irq_exit(irq_desc_get_chip(desc), desc);
199	}
200
201	static int imx_intmux_probe(struct platform_device *pdev)
202	{
203	struct device_node *np = pdev->dev.of_node;
204	struct irq_domain *domain;
205	struct intmux_data *data;
206	int channum;
207	int i, ret;
208
209	channum = platform_irq_count(pdev);
210	if (channum == -EPROBE_DEFER) {
211	return -EPROBE_DEFER;
212	} else if (channum > CHAN_MAX_NUM) {
213	dev_err(&pdev->dev, "supports up to %d multiplex channels\n",
214	CHAN_MAX_NUM);
215	return -EINVAL;
216	}
217
2f7a9bda	218	data = devm_kzalloc(&pdev->dev, struct_size(data, irqchip_data, channum), GFP_KERNEL);
2fbb1396 JZ	219	if (!data)
	220	return -ENOMEM;
	221
	222	data->regs = devm_platform_ioremap_resource(pdev, 0);
	223	if (IS_ERR(data->regs)) {
	224	dev_err(&pdev->dev, "failed to initialize reg\n");
	225	return PTR_ERR(data->regs);
	226	}
	227
	228	data->ipg_clk = devm_clk_get(&pdev->dev, "ipg");
c201f432 AH	229	if (IS_ERR(data->ipg_clk))
	230	return dev_err_probe(&pdev->dev, PTR_ERR(data->ipg_clk),
	231	"failed to get ipg clk\n");
2fbb1396 JZ	232
	233	data->channum = channum;
	234	raw_spin_lock_init(&data->lock);
	235
bb403111 JZ	236	pm_runtime_get_noresume(&pdev->dev);
	237	pm_runtime_set_active(&pdev->dev);
	238	pm_runtime_enable(&pdev->dev);
	239
2fbb1396 JZ	240	ret = clk_prepare_enable(data->ipg_clk);
	241	if (ret) {
	242	dev_err(&pdev->dev, "failed to enable ipg clk: %d\n", ret);
	243	return ret;
	244	}
	245
	246	for (i = 0; i < channum; i++) {
bb403111 JZ	247	data->irqchip_data[i].chip = imx_intmux_irq_chip;
bb403111 JZ	248	data->irqchip_data[i].chip.parent_device = &pdev->dev;
2fbb1396 JZ	249	data->irqchip_data[i].chanidx = i;
	250
	251	data->irqchip_data[i].irq = irq_of_parse_and_map(np, i);
	252	if (data->irqchip_data[i].irq <= 0) {
	253	ret = -EINVAL;
	254	dev_err(&pdev->dev, "failed to get irq\n");
	255	goto out;
	256	}
	257
	258	domain = irq_domain_add_linear(np, 32, &imx_intmux_domain_ops,
	259	&data->irqchip_data[i]);
	260	if (!domain) {
	261	ret = -ENOMEM;
	262	dev_err(&pdev->dev, "failed to create IRQ domain\n");
	263	goto out;
	264	}
	265	data->irqchip_data[i].domain = domain;
	266
	267	/* disable all interrupt sources of this channel firstly */
	268	writel_relaxed(0, data->regs + CHANIER(i));
	269
	270	irq_set_chained_handler_and_data(data->irqchip_data[i].irq,
	271	imx_intmux_irq_handler,
	272	&data->irqchip_data[i]);
	273	}
	274
	275	platform_set_drvdata(pdev, data);
	276
bb403111 JZ	277	/*
	278	* Let pm_runtime_put() disable clock.
	279	* If CONFIG_PM is not enabled, the clock will stay powered.
	280	*/
	281	pm_runtime_put(&pdev->dev);
	282
2fbb1396 JZ	283	return 0;
	284	out:
	285	clk_disable_unprepare(data->ipg_clk);
	286	return ret;
	287	}
	288
	289	static int imx_intmux_remove(struct platform_device *pdev)
	290	{
	291	struct intmux_data *data = platform_get_drvdata(pdev);
	292	int i;
	293
	294	for (i = 0; i < data->channum; i++) {
	295	/* disable all interrupt sources of this channel */
	296	writel_relaxed(0, data->regs + CHANIER(i));
	297
	298	irq_set_chained_handler_and_data(data->irqchip_data[i].irq,
	299	NULL, NULL);
	300
	301	irq_domain_remove(data->irqchip_data[i].domain);
	302	}
	303
bb403111 JZ	304	pm_runtime_disable(&pdev->dev);
	305
	306	return 0;
	307	}
	308
	309	#ifdef CONFIG_PM
	310	static int imx_intmux_runtime_suspend(struct device *dev)
	311	{
	312	struct intmux_data *data = dev_get_drvdata(dev);
5b6570bb	313	struct intmux_irqchip_data *irqchip_data;
bb403111 JZ	314	int i;
	315
	316	for (i = 0; i < data->channum; i++) {
5b6570bb WY	317	irqchip_data = &data->irqchip_data[i];
5b6570bb WY	318	irqchip_data->saved_reg = readl_relaxed(data->regs + CHANIER(i));
bb403111 JZ	319	}
bb403111 JZ	320
2fbb1396 JZ	321	clk_disable_unprepare(data->ipg_clk);
	322
	323	return 0;
	324	}
	325
bb403111 JZ	326	static int imx_intmux_runtime_resume(struct device *dev)
	327	{
	328	struct intmux_data *data = dev_get_drvdata(dev);
5b6570bb	329	struct intmux_irqchip_data *irqchip_data;
bb403111 JZ	330	int ret, i;
	331
	332	ret = clk_prepare_enable(data->ipg_clk);
	333	if (ret) {
	334	dev_err(dev, "failed to enable ipg clk: %d\n", ret);
	335	return ret;
	336	}
	337
	338	for (i = 0; i < data->channum; i++) {
5b6570bb WY	339	irqchip_data = &data->irqchip_data[i];
5b6570bb WY	340	writel_relaxed(irqchip_data->saved_reg, data->regs + CHANIER(i));
bb403111 JZ	341	}
	342
	343	return 0;
	344	}
	345	#endif
	346
	347	static const struct dev_pm_ops imx_intmux_pm_ops = {
	348	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
	349	pm_runtime_force_resume)
	350	SET_RUNTIME_PM_OPS(imx_intmux_runtime_suspend,
	351	imx_intmux_runtime_resume, NULL)
	352	};
	353
2fbb1396 JZ	354	static const struct of_device_id imx_intmux_id[] = {
	355	{ .compatible = "fsl,imx-intmux", },
	356	{ /* sentinel */ },
	357	};
	358
	359	static struct platform_driver imx_intmux_driver = {
	360	.driver = {
	361	.name = "imx-intmux",
	362	.of_match_table = imx_intmux_id,
bb403111	363	.pm = &imx_intmux_pm_ops,
2fbb1396 JZ	364	},
	365	.probe = imx_intmux_probe,
	366	.remove = imx_intmux_remove,
	367	};
	368	builtin_platform_driver(imx_intmux_driver);