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/*
* drivers/mfd/mfd-core.c
*
* core MFD support
* Copyright (c) 2006 Ian Molton
* Copyright (c) 2007,2008 Dmitry Baryshkov
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/acpi.h>
#include <linux/mfd/core.h>
#include <linux/slab.h>
static int mfd_add_device(struct device *parent, int id,
const struct mfd_cell *cell,
struct resource *mem_base,
int irq_base)
{
struct resource *res;
struct platform_device *pdev;
int ret = -ENOMEM;
int r;
pdev = platform_device_alloc(cell->name, id + cell->id);
if (!pdev)
goto fail_alloc;
res = kzalloc(sizeof(*res) * cell->num_resources, GFP_KERNEL);
if (!res)
goto fail_device;
pdev->dev.parent = parent;
platform_set_drvdata(pdev, cell->driver_data);
ret = platform_device_add_data(pdev,
cell->platform_data, cell->data_size);
if (ret)
goto fail_res;
for (r = 0; r < cell->num_resources; r++) {
res[r].name = cell->resources[r].name;
res[r].flags = cell->resources[r].flags;
/* Find out base to use */
if (cell->resources[r].flags & IORESOURCE_MEM) {
res[r].parent = mem_base;
res[r].start = mem_base->start +
cell->resources[r].start;
res[r].end = mem_base->start +
cell->resources[r].end;
} else if (cell->resources[r].flags & IORESOURCE_IRQ) {
res[r].start = irq_base +
cell->resources[r].start;
res[r].end = irq_base +
cell->resources[r].end;
} else {
res[r].parent = cell->resources[r].parent;
res[r].start = cell->resources[r].start;
res[r].end = cell->resources[r].end;
}
ret = acpi_check_resource_conflict(res);
if (ret)
goto fail_res;
}
platform_device_add_resources(pdev, res, cell->num_resources);
ret = platform_device_add(pdev);
if (ret)
goto fail_res;
kfree(res);
return 0;
/* platform_device_del(pdev); */
fail_res:
kfree(res);
fail_device:
platform_device_put(pdev);
fail_alloc:
return ret;
}
int mfd_add_devices(struct device *parent, int id,
const struct mfd_cell *cells, int n_devs,
struct resource *mem_base,
int irq_base)
{
int i;
int ret = 0;
for (i = 0; i < n_devs; i++) {
ret = mfd_add_device(parent, id, cells + i, mem_base, irq_base);
if (ret)
break;
}
if (ret)
mfd_remove_devices(parent);
return ret;
}
EXPORT_SYMBOL(mfd_add_devices);
static int mfd_remove_devices_fn(struct device *dev, void *unused)
{
platform_device_unregister(to_platform_device(dev));
return 0;
}
void mfd_remove_devices(struct device *parent)
{
device_for_each_child(parent, NULL, mfd_remove_devices_fn);
}
EXPORT_SYMBOL(mfd_remove_devices);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov");
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