[net-next-2.6.git] / drivers / mfd / mfd-core.c

/*
 * 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) && mem_base) {
			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;
	}

	ret = platform_device_add_resources(pdev, res, cell->num_resources);
	if (ret)
		goto fail_res;

	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");
Commit	Line	Data
aa613de6 DES	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>
91fedede	16	#include <linux/acpi.h>
aa613de6	17	#include <linux/mfd/core.h>
5a0e3ad6	18	#include <linux/slab.h>
aa613de6	19
424f525a	20	static int mfd_add_device(struct device *parent, int id,
7f71ac93 BD	21	const struct mfd_cell *cell,
	22	struct resource *mem_base,
	23	int irq_base)
aa613de6	24	{
a87903f3	25	struct resource *res;
aa613de6 DES	26	struct platform_device *pdev;
	27	int ret = -ENOMEM;
	28	int r;
	29
3bed6e41	30	pdev = platform_device_alloc(cell->name, id + cell->id);
aa613de6 DES	31	if (!pdev)
	32	goto fail_alloc;
	33
a87903f3 IM	34	res = kzalloc(sizeof(res) cell->num_resources, GFP_KERNEL);
	35	if (!res)
	36	goto fail_device;
	37
424f525a	38	pdev->dev.parent = parent;
44faac31	39	platform_set_drvdata(pdev, cell->driver_data);
aa613de6 DES	40
aa613de6 DES	41	ret = platform_device_add_data(pdev,
56edb58b	42	cell->platform_data, cell->data_size);
aa613de6	43	if (ret)
a87903f3	44	goto fail_res;
aa613de6	45
aa613de6 DES	46	for (r = 0; r < cell->num_resources; r++) {
	47	res[r].name = cell->resources[r].name;
	48	res[r].flags = cell->resources[r].flags;
	49
	50	/* Find out base to use */
f03cfcbc	51	if ((cell->resources[r].flags & IORESOURCE_MEM) && mem_base) {
aa613de6 DES	52	res[r].parent = mem_base;
	53	res[r].start = mem_base->start +
	54	cell->resources[r].start;
	55	res[r].end = mem_base->start +
	56	cell->resources[r].end;
	57	} else if (cell->resources[r].flags & IORESOURCE_IRQ) {
	58	res[r].start = irq_base +
	59	cell->resources[r].start;
	60	res[r].end = irq_base +
	61	cell->resources[r].end;
	62	} else {
	63	res[r].parent = cell->resources[r].parent;
	64	res[r].start = cell->resources[r].start;
	65	res[r].end = cell->resources[r].end;
	66	}
91fedede SO	67
	68	ret = acpi_check_resource_conflict(res);
	69	if (ret)
	70	goto fail_res;
aa613de6 DES	71	}
aa613de6 DES	72
8af5fe3b AL	73	ret = platform_device_add_resources(pdev, res, cell->num_resources);
	74	if (ret)
	75	goto fail_res;
aa613de6 DES	76
	77	ret = platform_device_add(pdev);
	78	if (ret)
a87903f3 IM	79	goto fail_res;
	80
	81	kfree(res);
aa613de6 DES	82
	83	return 0;
	84
	85	/* platform_device_del(pdev); */
a87903f3 IM	86	fail_res:
a87903f3 IM	87	kfree(res);
aa613de6 DES	88	fail_device:
	89	platform_device_put(pdev);
	90	fail_alloc:
	91	return ret;
	92	}
	93
424f525a	94	int mfd_add_devices(struct device *parent, int id,
7f71ac93 BD	95	const struct mfd_cell *cells, int n_devs,
	96	struct resource *mem_base,
	97	int irq_base)
aa613de6 DES	98	{
	99	int i;
	100	int ret = 0;
	101
	102	for (i = 0; i < n_devs; i++) {
424f525a	103	ret = mfd_add_device(parent, id, cells + i, mem_base, irq_base);
aa613de6 DES	104	if (ret)
	105	break;
	106	}
	107
	108	if (ret)
	109	mfd_remove_devices(parent);
	110
	111	return ret;
	112	}
	113	EXPORT_SYMBOL(mfd_add_devices);
	114
	115	static int mfd_remove_devices_fn(struct device dev, void unused)
	116	{
96ee4199	117	platform_device_unregister(to_platform_device(dev));
aa613de6 DES	118	return 0;
	119	}
	120
424f525a	121	void mfd_remove_devices(struct device *parent)
aa613de6	122	{
424f525a	123	device_for_each_child(parent, NULL, mfd_remove_devices_fn);
aa613de6 DES	124	}
	125	EXPORT_SYMBOL(mfd_remove_devices);
	126
	127	MODULE_LICENSE("GPL");
	128	MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov");