1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * sl28cpld interrupt controller driver
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright 2020 Kontron Europe GmbH
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/interrupt.h>
9*4882a593Smuzhiyun #include <linux/kernel.h>
10*4882a593Smuzhiyun #include <linux/mod_devicetable.h>
11*4882a593Smuzhiyun #include <linux/module.h>
12*4882a593Smuzhiyun #include <linux/platform_device.h>
13*4882a593Smuzhiyun #include <linux/property.h>
14*4882a593Smuzhiyun #include <linux/regmap.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #define INTC_IE 0x00
17*4882a593Smuzhiyun #define INTC_IP 0x01
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun static const struct regmap_irq sl28cpld_irqs[] = {
20*4882a593Smuzhiyun REGMAP_IRQ_REG_LINE(0, 8),
21*4882a593Smuzhiyun REGMAP_IRQ_REG_LINE(1, 8),
22*4882a593Smuzhiyun REGMAP_IRQ_REG_LINE(2, 8),
23*4882a593Smuzhiyun REGMAP_IRQ_REG_LINE(3, 8),
24*4882a593Smuzhiyun REGMAP_IRQ_REG_LINE(4, 8),
25*4882a593Smuzhiyun REGMAP_IRQ_REG_LINE(5, 8),
26*4882a593Smuzhiyun REGMAP_IRQ_REG_LINE(6, 8),
27*4882a593Smuzhiyun REGMAP_IRQ_REG_LINE(7, 8),
28*4882a593Smuzhiyun };
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun struct sl28cpld_intc {
31*4882a593Smuzhiyun struct regmap *regmap;
32*4882a593Smuzhiyun struct regmap_irq_chip chip;
33*4882a593Smuzhiyun struct regmap_irq_chip_data *irq_data;
34*4882a593Smuzhiyun };
35*4882a593Smuzhiyun
sl28cpld_intc_probe(struct platform_device * pdev)36*4882a593Smuzhiyun static int sl28cpld_intc_probe(struct platform_device *pdev)
37*4882a593Smuzhiyun {
38*4882a593Smuzhiyun struct device *dev = &pdev->dev;
39*4882a593Smuzhiyun struct sl28cpld_intc *irqchip;
40*4882a593Smuzhiyun int irq;
41*4882a593Smuzhiyun u32 base;
42*4882a593Smuzhiyun int ret;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun if (!dev->parent)
45*4882a593Smuzhiyun return -ENODEV;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun irqchip = devm_kzalloc(dev, sizeof(*irqchip), GFP_KERNEL);
48*4882a593Smuzhiyun if (!irqchip)
49*4882a593Smuzhiyun return -ENOMEM;
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun irqchip->regmap = dev_get_regmap(dev->parent, NULL);
52*4882a593Smuzhiyun if (!irqchip->regmap)
53*4882a593Smuzhiyun return -ENODEV;
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun irq = platform_get_irq(pdev, 0);
56*4882a593Smuzhiyun if (irq < 0)
57*4882a593Smuzhiyun return irq;
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun ret = device_property_read_u32(&pdev->dev, "reg", &base);
60*4882a593Smuzhiyun if (ret)
61*4882a593Smuzhiyun return -EINVAL;
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun irqchip->chip.name = "sl28cpld-intc";
64*4882a593Smuzhiyun irqchip->chip.irqs = sl28cpld_irqs;
65*4882a593Smuzhiyun irqchip->chip.num_irqs = ARRAY_SIZE(sl28cpld_irqs);
66*4882a593Smuzhiyun irqchip->chip.num_regs = 1;
67*4882a593Smuzhiyun irqchip->chip.status_base = base + INTC_IP;
68*4882a593Smuzhiyun irqchip->chip.mask_base = base + INTC_IE;
69*4882a593Smuzhiyun irqchip->chip.mask_invert = true,
70*4882a593Smuzhiyun irqchip->chip.ack_base = base + INTC_IP;
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun return devm_regmap_add_irq_chip_fwnode(dev, dev_fwnode(dev),
73*4882a593Smuzhiyun irqchip->regmap, irq,
74*4882a593Smuzhiyun IRQF_SHARED | IRQF_ONESHOT, 0,
75*4882a593Smuzhiyun &irqchip->chip,
76*4882a593Smuzhiyun &irqchip->irq_data);
77*4882a593Smuzhiyun }
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun static const struct of_device_id sl28cpld_intc_of_match[] = {
80*4882a593Smuzhiyun { .compatible = "kontron,sl28cpld-intc" },
81*4882a593Smuzhiyun {}
82*4882a593Smuzhiyun };
83*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, sl28cpld_intc_of_match);
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun static struct platform_driver sl28cpld_intc_driver = {
86*4882a593Smuzhiyun .probe = sl28cpld_intc_probe,
87*4882a593Smuzhiyun .driver = {
88*4882a593Smuzhiyun .name = "sl28cpld-intc",
89*4882a593Smuzhiyun .of_match_table = sl28cpld_intc_of_match,
90*4882a593Smuzhiyun }
91*4882a593Smuzhiyun };
92*4882a593Smuzhiyun module_platform_driver(sl28cpld_intc_driver);
93*4882a593Smuzhiyun
94*4882a593Smuzhiyun MODULE_DESCRIPTION("sl28cpld Interrupt Controller Driver");
95*4882a593Smuzhiyun MODULE_AUTHOR("Michael Walle <michael@walle.cc>");
96*4882a593Smuzhiyun MODULE_LICENSE("GPL");
97