projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| aa613de6 DB |
1 | /* |
| 2 | * drivers/mfd/mfd-core.c | |
| 3 | * | |
| 4 | * core MFD support | |
| 5 | * Copyright (c) 2006 Ian Molton | |
| 6 | * Copyright (c) 2007,2008 Dmitry Baryshkov | |
| 7 | * | |
| 8 | * This program is free software; you can redistribute it and/or modify | |
| 9 | * it under the terms of the GNU General Public License version 2 as | |
| 10 | * published by the Free Software Foundation. | |
| 11 | * | |
| 12 | */ | |
| 13 | ||
| 14 | #include <linux/kernel.h> | |
| 15 | #include <linux/platform_device.h> | |
| 16 | #include <linux/mfd/core.h> | |
| 17 | ||
| 18 | static int mfd_add_device(struct platform_device *parent, | |
| 7f71ac93 BD |
19 | const struct mfd_cell *cell, |
| 20 | struct resource *mem_base, | |
| 21 | int irq_base) | |
| aa613de6 DB |
22 | { |
| 23 | struct resource res[cell->num_resources]; | |
| 24 | struct platform_device *pdev; | |
| 25 | int ret = -ENOMEM; | |
| 26 | int r; | |
| 27 | ||
| 28 | pdev = platform_device_alloc(cell->name, parent->id); | |
| 29 | if (!pdev) | |
| 30 | goto fail_alloc; | |
| 31 | ||
| 32 | pdev->dev.parent = &parent->dev; | |
| 33 | ||
| 34 | ret = platform_device_add_data(pdev, | |
| 56edb58b | 35 | cell->platform_data, cell->data_size); |
| aa613de6 DB |
36 | if (ret) |
| 37 | goto fail_device; | |
| 38 | ||
| c82dd532 | 39 | memset(res, 0, sizeof(res)); |
| aa613de6 DB |
40 | for (r = 0; r < cell->num_resources; r++) { |
| 41 | res[r].name = cell->resources[r].name; | |
| 42 | res[r].flags = cell->resources[r].flags; | |
| 43 | ||
| 44 | /* Find out base to use */ | |
| 45 | if (cell->resources[r].flags & IORESOURCE_MEM) { | |
| 46 | res[r].parent = mem_base; | |
| 47 | res[r].start = mem_base->start + | |
| 48 | cell->resources[r].start; | |
| 49 | res[r].end = mem_base->start + | |
| 50 | cell->resources[r].end; | |
| 51 | } else if (cell->resources[r].flags & IORESOURCE_IRQ) { | |
| 52 | res[r].start = irq_base + | |
| 53 | cell->resources[r].start; | |
| 54 | res[r].end = irq_base + | |
| 55 | cell->resources[r].end; | |
| 56 | } else { | |
| 57 | res[r].parent = cell->resources[r].parent; | |
| 58 | res[r].start = cell->resources[r].start; | |
| 59 | res[r].end = cell->resources[r].end; | |
| 60 | } | |
| 61 | } | |
| 62 | ||
| 63 | platform_device_add_resources(pdev, res, cell->num_resources); | |
| 64 | ||
| 65 | ret = platform_device_add(pdev); | |
| 66 | if (ret) | |
| 67 | goto fail_device; | |
| 68 | ||
| 69 | return 0; | |
| 70 | ||
| 71 | /* platform_device_del(pdev); */ | |
| 72 | fail_device: | |
| 73 | platform_device_put(pdev); | |
| 74 | fail_alloc: | |
| 75 | return ret; | |
| 76 | } | |
| 77 | ||
| 7f71ac93 BD |
78 | int mfd_add_devices(struct platform_device *parent, |
| 79 | const struct mfd_cell *cells, int n_devs, | |
| 80 | struct resource *mem_base, | |
| 81 | int irq_base) | |
| aa613de6 DB |
82 | { |
| 83 | int i; | |
| 84 | int ret = 0; | |
| 85 | ||
| 86 | for (i = 0; i < n_devs; i++) { | |
| 87 | ret = mfd_add_device(parent, cells + i, mem_base, irq_base); | |
| 88 | if (ret) | |
| 89 | break; | |
| 90 | } | |
| 91 | ||
| 92 | if (ret) | |
| 93 | mfd_remove_devices(parent); | |
| 94 | ||
| 95 | return ret; | |
| 96 | } | |
| 97 | EXPORT_SYMBOL(mfd_add_devices); | |
| 98 | ||
| 99 | static int mfd_remove_devices_fn(struct device *dev, void *unused) | |
| 100 | { | |
| 96ee4199 | 101 | platform_device_unregister(to_platform_device(dev)); |
| aa613de6 DB |
102 | return 0; |
| 103 | } | |
| 104 | ||
| 105 | void mfd_remove_devices(struct platform_device *parent) | |
| 106 | { | |
| 107 | device_for_each_child(&parent->dev, NULL, mfd_remove_devices_fn); | |
| 108 | } | |
| 109 | EXPORT_SYMBOL(mfd_remove_devices); | |
| 110 | ||
| 111 | MODULE_LICENSE("GPL"); | |
| 112 | MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov"); |