Dmitry Baryshkov | aa613de | 2008-06-27 10:37:19 +0100 | [diff] [blame] | 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, |
| 19 | const struct mfd_cell *cell, |
| 20 | struct resource *mem_base, |
| 21 | int irq_base) |
| 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, |
| 35 | cell, sizeof(struct mfd_cell)); |
| 36 | if (ret) |
| 37 | goto fail_device; |
| 38 | |
Andrew Morton | c82dd53 | 2008-07-25 01:45:22 -0700 | [diff] [blame^] | 39 | memset(res, 0, sizeof(res)); |
Dmitry Baryshkov | aa613de | 2008-06-27 10:37:19 +0100 | [diff] [blame] | 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 | |
| 78 | int mfd_add_devices( |
| 79 | struct platform_device *parent, |
| 80 | const struct mfd_cell *cells, int n_devs, |
| 81 | struct resource *mem_base, |
| 82 | int irq_base) |
| 83 | { |
| 84 | int i; |
| 85 | int ret = 0; |
| 86 | |
| 87 | for (i = 0; i < n_devs; i++) { |
| 88 | ret = mfd_add_device(parent, cells + i, mem_base, irq_base); |
| 89 | if (ret) |
| 90 | break; |
| 91 | } |
| 92 | |
| 93 | if (ret) |
| 94 | mfd_remove_devices(parent); |
| 95 | |
| 96 | return ret; |
| 97 | } |
| 98 | EXPORT_SYMBOL(mfd_add_devices); |
| 99 | |
| 100 | static int mfd_remove_devices_fn(struct device *dev, void *unused) |
| 101 | { |
| 102 | platform_device_unregister( |
| 103 | container_of(dev, struct platform_device, dev)); |
| 104 | return 0; |
| 105 | } |
| 106 | |
| 107 | void mfd_remove_devices(struct platform_device *parent) |
| 108 | { |
| 109 | device_for_each_child(&parent->dev, NULL, mfd_remove_devices_fn); |
| 110 | } |
| 111 | EXPORT_SYMBOL(mfd_remove_devices); |
| 112 | |
| 113 | MODULE_LICENSE("GPL"); |
| 114 | MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov"); |