| Simon Glass | ff418d9 | 2019-12-06 21:41:58 -0700 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* |
| 3 | * IRQ is a type of interrupt controller used on recent Intel SoC. |
| 4 | * |
| 5 | * Copyright 2019 Google LLC |
| 6 | */ |
| 7 | |
| 8 | #ifndef __irq_H |
| 9 | #define __irq_H |
| 10 | |
| 11 | /** |
| 12 | * struct irq_ops - Operations for the IRQ |
| 13 | */ |
| 14 | struct irq_ops { |
| 15 | /** |
| 16 | * route_pmc_gpio_gpe() - Get the GPIO for an event |
| 17 | * |
| 18 | * @dev: IRQ device |
| 19 | * @pmc_gpe_num: Event number to check |
| 20 | * @returns GPIO for the event, or -ENOENT if none |
| 21 | */ |
| 22 | int (*route_pmc_gpio_gpe)(struct udevice *dev, uint pmc_gpe_num); |
| 23 | |
| 24 | /** |
| 25 | * set_polarity() - Set the IRQ polarity |
| 26 | * |
| 27 | * @dev: IRQ device |
| 28 | * @irq: Interrupt number to set |
| 29 | * @active_low: true if active low, false for active high |
| 30 | * @return 0 if OK, -EINVAL if @irq is invalid |
| 31 | */ |
| 32 | int (*set_polarity)(struct udevice *dev, uint irq, bool active_low); |
| 33 | |
| 34 | /** |
| 35 | * snapshot_polarities() - record IRQ polarities for later restore |
| 36 | * |
| 37 | * @dev: IRQ device |
| 38 | * @return 0 |
| 39 | */ |
| 40 | int (*snapshot_polarities)(struct udevice *dev); |
| 41 | |
| 42 | /** |
| 43 | * restore_polarities() - restore IRQ polarities |
| 44 | * |
| 45 | * @dev: IRQ device |
| 46 | * @return 0 |
| 47 | */ |
| 48 | int (*restore_polarities)(struct udevice *dev); |
| 49 | }; |
| 50 | |
| 51 | #define irq_get_ops(dev) ((struct irq_ops *)(dev)->driver->ops) |
| 52 | |
| 53 | /** |
| 54 | * irq_route_pmc_gpio_gpe() - Get the GPIO for an event |
| 55 | * |
| 56 | * @dev: IRQ device |
| 57 | * @pmc_gpe_num: Event number to check |
| 58 | * @returns GPIO for the event, or -ENOENT if none |
| 59 | */ |
| 60 | int irq_route_pmc_gpio_gpe(struct udevice *dev, uint pmc_gpe_num); |
| 61 | |
| 62 | /** |
| 63 | * irq_set_polarity() - Set the IRQ polarity |
| 64 | * |
| 65 | * @dev: IRQ device |
| 66 | * @irq: Interrupt number to set |
| 67 | * @active_low: true if active low, false for active high |
| 68 | * @return 0 if OK, -EINVAL if @irq is invalid |
| 69 | */ |
| 70 | int irq_set_polarity(struct udevice *dev, uint irq, bool active_low); |
| 71 | |
| 72 | /** |
| 73 | * irq_snapshot_polarities() - record IRQ polarities for later restore |
| 74 | * |
| 75 | * @dev: IRQ device |
| 76 | * @return 0 |
| 77 | */ |
| 78 | int irq_snapshot_polarities(struct udevice *dev); |
| 79 | |
| 80 | /** |
| 81 | * irq_restore_polarities() - restore IRQ polarities |
| 82 | * |
| 83 | * @dev: IRQ device |
| 84 | * @return 0 |
| 85 | */ |
| 86 | int irq_restore_polarities(struct udevice *dev); |
| 87 | |
| 88 | #endif |