projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 03ac990e MW |
1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* | |
| 3 | * sl28cpld interrupt controller driver | |
| 4 | * | |
| 5 | * Copyright 2020 Kontron Europe GmbH | |
| 6 | */ | |
| 7 | ||
| 8 | #include <linux/interrupt.h> | |
| 9 | #include <linux/kernel.h> | |
| 10 | #include <linux/mod_devicetable.h> | |
| 11 | #include <linux/module.h> | |
| 12 | #include <linux/platform_device.h> | |
| 13 | #include <linux/property.h> | |
| 14 | #include <linux/regmap.h> | |
| 15 | ||
| 16 | #define INTC_IE 0x00 | |
| 17 | #define INTC_IP 0x01 | |
| 18 | ||
| 19 | static const struct regmap_irq sl28cpld_irqs[] = { | |
| 20 | REGMAP_IRQ_REG_LINE(0, 8), | |
| 21 | REGMAP_IRQ_REG_LINE(1, 8), | |
| 22 | REGMAP_IRQ_REG_LINE(2, 8), | |
| 23 | REGMAP_IRQ_REG_LINE(3, 8), | |
| 24 | REGMAP_IRQ_REG_LINE(4, 8), | |
| 25 | REGMAP_IRQ_REG_LINE(5, 8), | |
| 26 | REGMAP_IRQ_REG_LINE(6, 8), | |
| 27 | REGMAP_IRQ_REG_LINE(7, 8), | |
| 28 | }; | |
| 29 | ||
| 30 | struct sl28cpld_intc { | |
| 31 | struct regmap *regmap; | |
| 32 | struct regmap_irq_chip chip; | |
| 33 | struct regmap_irq_chip_data *irq_data; | |
| 34 | }; | |
| 35 | ||
| 36 | static int sl28cpld_intc_probe(struct platform_device *pdev) | |
| 37 | { | |
| 38 | struct device *dev = &pdev->dev; | |
| 39 | struct sl28cpld_intc *irqchip; | |
| 40 | int irq; | |
| 41 | u32 base; | |
| 42 | int ret; | |
| 43 | ||
| 44 | if (!dev->parent) | |
| 45 | return -ENODEV; | |
| 46 | ||
| 47 | irqchip = devm_kzalloc(dev, sizeof(*irqchip), GFP_KERNEL); | |
| 48 | if (!irqchip) | |
| 49 | return -ENOMEM; | |
| 50 | ||
| 51 | irqchip->regmap = dev_get_regmap(dev->parent, NULL); | |
| 52 | if (!irqchip->regmap) | |
| 53 | return -ENODEV; | |
| 54 | ||
| 55 | irq = platform_get_irq(pdev, 0); | |
| 56 | if (irq < 0) | |
| 57 | return irq; | |
| 58 | ||
| 59 | ret = device_property_read_u32(&pdev->dev, "reg", &base); | |
| 60 | if (ret) | |
| 61 | return -EINVAL; | |
| 62 | ||
| 63 | irqchip->chip.name = "sl28cpld-intc"; | |
| 64 | irqchip->chip.irqs = sl28cpld_irqs; | |
| 65 | irqchip->chip.num_irqs = ARRAY_SIZE(sl28cpld_irqs); | |
| 66 | irqchip->chip.num_regs = 1; | |
| 67 | irqchip->chip.status_base = base + INTC_IP; | |
| 68 | irqchip->chip.mask_base = base + INTC_IE; | |
| e90f55e0 | 69 | irqchip->chip.mask_invert = true; |
| 03ac990e MW |
70 | irqchip->chip.ack_base = base + INTC_IP; |
| 71 | ||
| 72 | return devm_regmap_add_irq_chip_fwnode(dev, dev_fwnode(dev), | |
| 73 | irqchip->regmap, irq, | |
| 74 | IRQF_SHARED | IRQF_ONESHOT, 0, | |
| 75 | &irqchip->chip, | |
| 76 | &irqchip->irq_data); | |
| 77 | } | |
| 78 | ||
| 79 | static const struct of_device_id sl28cpld_intc_of_match[] = { | |
| 80 | { .compatible = "kontron,sl28cpld-intc" }, | |
| 81 | {} | |
| 82 | }; | |
| 83 | MODULE_DEVICE_TABLE(of, sl28cpld_intc_of_match); | |
| 84 | ||
| 85 | static struct platform_driver sl28cpld_intc_driver = { | |
| 86 | .probe = sl28cpld_intc_probe, | |
| 87 | .driver = { | |
| 88 | .name = "sl28cpld-intc", | |
| 89 | .of_match_table = sl28cpld_intc_of_match, | |
| 90 | } | |
| 91 | }; | |
| 92 | module_platform_driver(sl28cpld_intc_driver); | |
| 93 | ||
| 94 | MODULE_DESCRIPTION("sl28cpld Interrupt Controller Driver"); | |
| 95 | MODULE_AUTHOR("Michael Walle <michael@walle.cc>"); | |
| 96 | MODULE_LICENSE("GPL"); |