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/*
* 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_get_bits(struct anatop *adata, u32 addr, int bit_shift,
int bit_width)
{
u32 val, mask;
if (bit_width == 32)
mask = ~0;
else
mask = (1 << bit_width) - 1;
val = readl(adata->ioreg + addr);
val = (val >> bit_shift) & mask;
return val;
}
EXPORT_SYMBOL_GPL(anatop_get_bits);
void anatop_set_bits(struct anatop *adata, u32 addr, int bit_shift,
int bit_width, u32 data)
{
u32 val, mask;
if (bit_width == 32)
mask = ~0;
else
mask = (1 << bit_width) - 1;
spin_lock(&adata->reglock);
val = readl(adata->ioreg + addr) & ~(mask << bit_shift);
writel((data << bit_shift) | val, adata->ioreg + addr);
spin_unlock(&adata->reglock);
}
EXPORT_SYMBOL_GPL(anatop_set_bits);
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");
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