97 строки
2.3 KiB
C
97 строки
2.3 KiB
C
|
// 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");
|