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96 lines
2.3 KiB
96 lines
2.3 KiB
// 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.mask_base = base + INTC_IE; |
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irqchip->chip.mask_invert = true; |
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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 <[email protected]>"); |
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MODULE_LICENSE("GPL");
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