// 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.unmask_base = base + INTC_IE; 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>");