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