projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| fbb0efdd SG |
1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* | |
| 3 | * Sandbox driver for interrupts | |
| 4 | * | |
| 5 | * Copyright 2019 Google LLC | |
| 6 | */ | |
| 7 | ||
| 8 | #include <common.h> | |
| 9 | #include <dm.h> | |
| 10 | #include <irq.h> | |
| 02554355 SG |
11 | #include <asm/test.h> |
| 12 | ||
| 13 | /** | |
| 14 | * struct sandbox_irq_priv - private data for this driver | |
| 15 | * | |
| 16 | * @count: Counts the number calls to the read_and_clear() method | |
| 17 | * @pending: true if an interrupt is pending, else false | |
| 18 | */ | |
| 19 | struct sandbox_irq_priv { | |
| 20 | int count; | |
| 21 | bool pending; | |
| 22 | }; | |
| fbb0efdd SG |
23 | |
| 24 | static int sandbox_set_polarity(struct udevice *dev, uint irq, bool active_low) | |
| 25 | { | |
| 26 | if (irq > 10) | |
| 27 | return -EINVAL; | |
| 28 | ||
| 29 | return 0; | |
| 30 | } | |
| 31 | ||
| 32 | static int sandbox_route_pmc_gpio_gpe(struct udevice *dev, uint pmc_gpe_num) | |
| 33 | { | |
| 34 | if (pmc_gpe_num > 10) | |
| 35 | return -ENOENT; | |
| 36 | ||
| 37 | return pmc_gpe_num + 1; | |
| 38 | } | |
| 39 | ||
| 40 | static int sandbox_snapshot_polarities(struct udevice *dev) | |
| 41 | { | |
| 42 | return 0; | |
| 43 | } | |
| 44 | ||
| 45 | static int sandbox_restore_polarities(struct udevice *dev) | |
| 46 | { | |
| 47 | return 0; | |
| 48 | } | |
| 49 | ||
| 02554355 SG |
50 | static int sandbox_irq_read_and_clear(struct irq *irq) |
| 51 | { | |
| 52 | struct sandbox_irq_priv *priv = dev_get_priv(irq->dev); | |
| 53 | ||
| 54 | if (irq->id != SANDBOX_IRQN_PEND) | |
| 55 | return -EINVAL; | |
| 56 | priv->count++; | |
| 57 | if (priv->pending) { | |
| 58 | priv->pending = false; | |
| 59 | return 1; | |
| 60 | } | |
| 61 | ||
| 62 | if (!(priv->count % 3)) | |
| 63 | priv->pending = true; | |
| 64 | ||
| 65 | return 0; | |
| 66 | } | |
| 67 | ||
| 68 | static int sandbox_irq_of_xlate(struct irq *irq, | |
| 69 | struct ofnode_phandle_args *args) | |
| 70 | { | |
| 71 | irq->id = args->args[0]; | |
| 72 | ||
| 73 | return 0; | |
| 74 | } | |
| 75 | ||
| fbb0efdd SG |
76 | static const struct irq_ops sandbox_irq_ops = { |
| 77 | .route_pmc_gpio_gpe = sandbox_route_pmc_gpio_gpe, | |
| 78 | .set_polarity = sandbox_set_polarity, | |
| 79 | .snapshot_polarities = sandbox_snapshot_polarities, | |
| 80 | .restore_polarities = sandbox_restore_polarities, | |
| 02554355 SG |
81 | .read_and_clear = sandbox_irq_read_and_clear, |
| 82 | .of_xlate = sandbox_irq_of_xlate, | |
| fbb0efdd SG |
83 | }; |
| 84 | ||
| 85 | static const struct udevice_id sandbox_irq_ids[] = { | |
| ba876079 | 86 | { .compatible = "sandbox,irq", SANDBOX_IRQT_BASE }, |
| fbb0efdd SG |
87 | { } |
| 88 | }; | |
| 89 | ||
| 90 | U_BOOT_DRIVER(sandbox_irq_drv) = { | |
| 91 | .name = "sandbox_irq", | |
| 92 | .id = UCLASS_IRQ, | |
| 93 | .of_match = sandbox_irq_ids, | |
| 94 | .ops = &sandbox_irq_ops, | |
| 02554355 | 95 | .priv_auto_alloc_size = sizeof(struct sandbox_irq_priv), |
| fbb0efdd | 96 | }; |