[mirror_ubuntu-artful-kernel.git] / drivers / mfd / anatop-mfd.c

/*
 * Anatop MFD driver
 *
 * Copyright (C) 2012 Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
 * Copyright (C) 2012 Linaro
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 */

#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/of_address.h>
#include <linux/mfd/anatop.h>

u32 anatop_read_reg(struct anatop *adata, u32 addr)
{
	return readl(adata->ioreg + addr);
}
EXPORT_SYMBOL_GPL(anatop_read_reg);

void anatop_write_reg(struct anatop *adata, u32 addr, u32 data, u32 mask)
{
	u32 val;

	data &= mask;

	spin_lock(&adata->reglock);
	val = readl(adata->ioreg + addr);
	val &= ~mask;
	val |= data;
	writel(val, adata->ioreg + addr);
	spin_unlock(&adata->reglock);
}
EXPORT_SYMBOL_GPL(anatop_write_reg);

static const struct of_device_id of_anatop_match[] = {
	{ .compatible = "fsl,imx6q-anatop", },
	{ },
};

static int __devinit of_anatop_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct device_node *np = dev->of_node;
	void *ioreg;
	struct anatop *drvdata;

	ioreg = of_iomap(np, 0);
	if (!ioreg)
		return -EADDRNOTAVAIL;
	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
	if (!drvdata)
		return -ENOMEM;
	drvdata->ioreg = ioreg;
	spin_lock_init(&drvdata->reglock);
	platform_set_drvdata(pdev, drvdata);
	of_platform_populate(np, of_anatop_match, NULL, dev);

	return 0;
}

static int __devexit of_anatop_remove(struct platform_device *pdev)
{
	struct anatop *drvdata;
	drvdata = platform_get_drvdata(pdev);
	iounmap(drvdata->ioreg);

	return 0;
}

static struct platform_driver anatop_of_driver = {
	.driver = {
		.name = "anatop-mfd",
		.owner = THIS_MODULE,
		.of_match_table = of_anatop_match,
	},
	.probe		= of_anatop_probe,
	.remove		= of_anatop_remove,
};

static int __init anatop_init(void)
{
	return platform_driver_register(&anatop_of_driver);
}
postcore_initcall(anatop_init);

static void __exit anatop_exit(void)
{
	platform_driver_unregister(&anatop_of_driver);
}
module_exit(anatop_exit);

MODULE_AUTHOR("Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>");
MODULE_DESCRIPTION("ANATOP MFD driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
75060a1d YCLP	1	/*
	2	* Anatop MFD driver
	3	*
	4	* Copyright (C) 2012 Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
	5	* Copyright (C) 2012 Linaro
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License along
	18	* with this program; if not, write to the Free Software Foundation, Inc.,
	19	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	20	* This program is free software; you can redistribute it and/or modify
	21	* it under the terms of the GNU General Public License as published by
	22	* the Free Software Foundation; either version 2 of the License, or
	23	* (at your option) any later version.
	24	*
	25	* This program is distributed in the hope that it will be useful,
	26	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	27	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	28	* GNU General Public License for more details.
	29	*
	30	* You should have received a copy of the GNU General Public License along
	31	* with this program; if not, write to the Free Software Foundation, Inc.,
	32	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	33	*
	34	*/
	35
	36	#include <linux/io.h>
	37	#include <linux/module.h>
	38	#include <linux/platform_device.h>
	39	#include <linux/of.h>
	40	#include <linux/of_platform.h>
	41	#include <linux/of_address.h>
	42	#include <linux/mfd/anatop.h>
	43
b09530ef	44	u32 anatop_read_reg(struct anatop *adata, u32 addr)
75060a1d	45	{
b09530ef	46	return readl(adata->ioreg + addr);
75060a1d	47	}
b09530ef	48	EXPORT_SYMBOL_GPL(anatop_read_reg);
75060a1d	49
b09530ef	50	void anatop_write_reg(struct anatop *adata, u32 addr, u32 data, u32 mask)
75060a1d	51	{
b09530ef	52	u32 val;
75060a1d	53
b09530ef	54	data &= mask;
75060a1d YCLP	55
75060a1d YCLP	56	spin_lock(&adata->reglock);
b09530ef RZ	57	val = readl(adata->ioreg + addr);
	58	val &= ~mask;
	59	val \|= data;
	60	writel(val, adata->ioreg + addr);
75060a1d YCLP	61	spin_unlock(&adata->reglock);
75060a1d YCLP	62	}
b09530ef	63	EXPORT_SYMBOL_GPL(anatop_write_reg);
75060a1d YCLP	64
	65	static const struct of_device_id of_anatop_match[] = {
	66	{ .compatible = "fsl,imx6q-anatop", },
	67	{ },
	68	};
	69
	70	static int __devinit of_anatop_probe(struct platform_device *pdev)
	71	{
	72	struct device *dev = &pdev->dev;
	73	struct device_node *np = dev->of_node;
	74	void *ioreg;
	75	struct anatop *drvdata;
	76
	77	ioreg = of_iomap(np, 0);
	78	if (!ioreg)
	79	return -EADDRNOTAVAIL;
	80	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
	81	if (!drvdata)
	82	return -ENOMEM;
	83	drvdata->ioreg = ioreg;
	84	spin_lock_init(&drvdata->reglock);
	85	platform_set_drvdata(pdev, drvdata);
	86	of_platform_populate(np, of_anatop_match, NULL, dev);
	87
	88	return 0;
	89	}
	90
	91	static int __devexit of_anatop_remove(struct platform_device *pdev)
	92	{
	93	struct anatop *drvdata;
	94	drvdata = platform_get_drvdata(pdev);
	95	iounmap(drvdata->ioreg);
	96
	97	return 0;
	98	}
	99
	100	static struct platform_driver anatop_of_driver = {
	101	.driver = {
	102	.name = "anatop-mfd",
	103	.owner = THIS_MODULE,
	104	.of_match_table = of_anatop_match,
	105	},
	106	.probe = of_anatop_probe,
	107	.remove = of_anatop_remove,
	108	};
	109
	110	static int __init anatop_init(void)
	111	{
	112	return platform_driver_register(&anatop_of_driver);
	113	}
	114	postcore_initcall(anatop_init);
	115
	116	static void __exit anatop_exit(void)
	117	{
	118	platform_driver_unregister(&anatop_of_driver);
	119	}
	120	module_exit(anatop_exit);
	121
	122	MODULE_AUTHOR("Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>");
	123	MODULE_DESCRIPTION("ANATOP MFD driver");
	124	MODULE_LICENSE("GPL v2");