[mirror_ubuntu-artful-kernel.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/mfd/core.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[cell->num_resources];
	struct platform_device *pdev;
	int ret = -ENOMEM;
	int r;

	pdev = platform_device_alloc(cell->name, id);
	if (!pdev)
		goto fail_alloc;

	pdev->dev.parent = parent;

	ret = platform_device_add_data(pdev,
			cell->platform_data, cell->data_size);
	if (ret)
		goto fail_device;

	memset(res, 0, sizeof(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;
		}
	}

	platform_device_add_resources(pdev, res, cell->num_resources);

	ret = platform_device_add(pdev);
	if (ret)
		goto fail_device;

	return 0;

/*	platform_device_del(pdev); */
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>
	16	#include <linux/mfd/core.h>
	17
424f525a	18	static int mfd_add_device(struct device *parent, int id,
7f71ac93 BD	19	const struct mfd_cell *cell,
	20	struct resource *mem_base,
	21	int irq_base)
aa613de6 DES	22	{
	23	struct resource res[cell->num_resources];
	24	struct platform_device *pdev;
	25	int ret = -ENOMEM;
	26	int r;
	27
424f525a	28	pdev = platform_device_alloc(cell->name, id);
aa613de6 DES	29	if (!pdev)
	30	goto fail_alloc;
	31
424f525a	32	pdev->dev.parent = parent;
aa613de6 DES	33
aa613de6 DES	34	ret = platform_device_add_data(pdev,
56edb58b	35	cell->platform_data, cell->data_size);
aa613de6 DES	36	if (ret)
	37	goto fail_device;
	38
c82dd532	39	memset(res, 0, sizeof(res));
aa613de6 DES	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
424f525a	78	int mfd_add_devices(struct device *parent, int id,
7f71ac93 BD	79	const struct mfd_cell *cells, int n_devs,
	80	struct resource *mem_base,
	81	int irq_base)
aa613de6 DES	82	{
	83	int i;
	84	int ret = 0;
	85
	86	for (i = 0; i < n_devs; i++) {
424f525a	87	ret = mfd_add_device(parent, id, cells + i, mem_base, irq_base);
aa613de6 DES	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 DES	102	return 0;
	103	}
	104
424f525a	105	void mfd_remove_devices(struct device *parent)
aa613de6	106	{
424f525a	107	device_for_each_child(parent, NULL, mfd_remove_devices_fn);
aa613de6 DES	108	}
	109	EXPORT_SYMBOL(mfd_remove_devices);
	110
	111	MODULE_LICENSE("GPL");
	112	MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov");