projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| aaf9128a | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 9daa0c25 PM |
2 | /* |
| 3 | * arch/sh/boards/renesas/r7780rp/psw.c | |
| 4 | * | |
| 5 | * push switch support for RDBRP-1/RDBREVRP-1 debug boards. | |
| 6 | * | |
| 7 | * Copyright (C) 2006 Paul Mundt | |
| 9daa0c25 PM |
8 | */ |
| 9 | #include <linux/io.h> | |
| 0bbad249 | 10 | #include <linux/module.h> |
| 9daa0c25 PM |
11 | #include <linux/interrupt.h> |
| 12 | #include <linux/platform_device.h> | |
| 7639a454 | 13 | #include <mach/highlander.h> |
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14 | #include <asm/push-switch.h> |
| 15 | ||
| 16 | static irqreturn_t psw_irq_handler(int irq, void *arg) | |
| 17 | { | |
| 18 | struct platform_device *pdev = arg; | |
| 19 | struct push_switch *psw = platform_get_drvdata(pdev); | |
| 20 | struct push_switch_platform_info *psw_info = pdev->dev.platform_data; | |
| 21 | unsigned int l, mask; | |
| 22 | int ret = 0; | |
| 23 | ||
| 9d56dd3b | 24 | l = __raw_readw(PA_DBSW); |
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25 | |
| 26 | /* Nothing to do if there's no state change */ | |
| 27 | if (psw->state) { | |
| 28 | ret = 1; | |
| 29 | goto out; | |
| 30 | } | |
| 31 | ||
| 32 | mask = l & 0x70; | |
| 33 | /* Figure out who raised it */ | |
| 34 | if (mask & (1 << psw_info->bit)) { | |
| 35 | psw->state = !!(mask & (1 << psw_info->bit)); | |
| 36 | if (psw->state) /* debounce */ | |
| 37 | mod_timer(&psw->debounce, jiffies + 50); | |
| 38 | ||
| 39 | ret = 1; | |
| 40 | } | |
| 41 | ||
| 42 | out: | |
| 43 | /* Clear the switch IRQs */ | |
| 44 | l |= (0x7 << 12); | |
| 9d56dd3b | 45 | __raw_writew(l, PA_DBSW); |
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46 | |
| 47 | return IRQ_RETVAL(ret); | |
| 48 | } | |
| 49 | ||
| 50 | static struct resource psw_resources[] = { | |
| 51 | [0] = { | |
| 52 | .start = IRQ_PSW, | |
| 53 | .flags = IORESOURCE_IRQ, | |
| 54 | }, | |
| 55 | }; | |
| 56 | ||
| 57 | static struct push_switch_platform_info s2_platform_data = { | |
| 58 | .name = "s2", | |
| 59 | .bit = 6, | |
| 60 | .irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | | |
| 61 | IRQF_SHARED, | |
| 62 | .irq_handler = psw_irq_handler, | |
| 63 | }; | |
| 64 | ||
| 65 | static struct platform_device s2_switch_device = { | |
| 66 | .name = "push-switch", | |
| 67 | .id = 0, | |
| 68 | .num_resources = ARRAY_SIZE(psw_resources), | |
| 69 | .resource = psw_resources, | |
| 70 | .dev = { | |
| 71 | .platform_data = &s2_platform_data, | |
| 72 | }, | |
| 73 | }; | |
| 74 | ||
| 75 | static struct push_switch_platform_info s3_platform_data = { | |
| 76 | .name = "s3", | |
| 77 | .bit = 5, | |
| 78 | .irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | | |
| 79 | IRQF_SHARED, | |
| 80 | .irq_handler = psw_irq_handler, | |
| 81 | }; | |
| 82 | ||
| 83 | static struct platform_device s3_switch_device = { | |
| 84 | .name = "push-switch", | |
| 85 | .id = 1, | |
| 86 | .num_resources = ARRAY_SIZE(psw_resources), | |
| 87 | .resource = psw_resources, | |
| 88 | .dev = { | |
| 89 | .platform_data = &s3_platform_data, | |
| 90 | }, | |
| 91 | }; | |
| 92 | ||
| 93 | static struct push_switch_platform_info s4_platform_data = { | |
| 94 | .name = "s4", | |
| 95 | .bit = 4, | |
| 96 | .irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | | |
| 97 | IRQF_SHARED, | |
| 98 | .irq_handler = psw_irq_handler, | |
| 99 | }; | |
| 100 | ||
| 101 | static struct platform_device s4_switch_device = { | |
| 102 | .name = "push-switch", | |
| 103 | .id = 2, | |
| 104 | .num_resources = ARRAY_SIZE(psw_resources), | |
| 105 | .resource = psw_resources, | |
| 106 | .dev = { | |
| 107 | .platform_data = &s4_platform_data, | |
| 108 | }, | |
| 109 | }; | |
| 110 | ||
| 111 | static struct platform_device *psw_devices[] = { | |
| 112 | &s2_switch_device, &s3_switch_device, &s4_switch_device, | |
| 113 | }; | |
| 114 | ||
| 115 | static int __init psw_init(void) | |
| 116 | { | |
| 117 | return platform_add_devices(psw_devices, ARRAY_SIZE(psw_devices)); | |
| 118 | } | |
| 119 | module_init(psw_init); |