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// SPDX-License-Identifier: GPL-2.0-only
/*
* sl28cpld interrupt controller driver
*
* Copyright 2020 Kontron Europe GmbH
*/
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/regmap.h>
#define INTC_IE 0x00
#define INTC_IP 0x01
static const struct regmap_irq sl28cpld_irqs[] = {
REGMAP_IRQ_REG_LINE(0, 8),
REGMAP_IRQ_REG_LINE(1, 8),
REGMAP_IRQ_REG_LINE(2, 8),
REGMAP_IRQ_REG_LINE(3, 8),
REGMAP_IRQ_REG_LINE(4, 8),
REGMAP_IRQ_REG_LINE(5, 8),
REGMAP_IRQ_REG_LINE(6, 8),
REGMAP_IRQ_REG_LINE(7, 8),
};
struct sl28cpld_intc {
struct regmap *regmap;
struct regmap_irq_chip chip;
struct regmap_irq_chip_data *irq_data;
};
static int sl28cpld_intc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct sl28cpld_intc *irqchip;
int irq;
u32 base;
int ret;
if (!dev->parent)
return -ENODEV;
irqchip = devm_kzalloc(dev, sizeof(*irqchip), GFP_KERNEL);
if (!irqchip)
return -ENOMEM;
irqchip->regmap = dev_get_regmap(dev->parent, NULL);
if (!irqchip->regmap)
return -ENODEV;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
ret = device_property_read_u32(&pdev->dev, "reg", &base);
if (ret)
return -EINVAL;
irqchip->chip.name = "sl28cpld-intc";
irqchip->chip.irqs = sl28cpld_irqs;
irqchip->chip.num_irqs = ARRAY_SIZE(sl28cpld_irqs);
irqchip->chip.num_regs = 1;
irqchip->chip.status_base = base + INTC_IP;
irqchip->chip.mask_base = base + INTC_IE;
irqchip->chip.mask_invert = true;
irqchip->chip.ack_base = base + INTC_IP;
return devm_regmap_add_irq_chip_fwnode(dev, dev_fwnode(dev),
irqchip->regmap, irq,
IRQF_SHARED | IRQF_ONESHOT, 0,
&irqchip->chip,
&irqchip->irq_data);
}
static const struct of_device_id sl28cpld_intc_of_match[] = {
{ .compatible = "kontron,sl28cpld-intc" },
{}
};
MODULE_DEVICE_TABLE(of, sl28cpld_intc_of_match);
static struct platform_driver sl28cpld_intc_driver = {
.probe = sl28cpld_intc_probe,
.driver = {
.name = "sl28cpld-intc",
.of_match_table = sl28cpld_intc_of_match,
}
};
module_platform_driver(sl28cpld_intc_driver);
MODULE_DESCRIPTION("sl28cpld Interrupt Controller Driver");
MODULE_AUTHOR("Michael Walle <michael@walle.cc>");
MODULE_LICENSE("GPL");
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