mirror of https://gitee.com/openkylin/linux.git
125 lines
3.5 KiB
C
125 lines
3.5 KiB
C
/*
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* Anatop MFD driver
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*
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* Copyright (C) 2012 Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
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* Copyright (C) 2012 Linaro
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/of_address.h>
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#include <linux/mfd/anatop.h>
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u32 anatop_read_reg(struct anatop *adata, u32 addr)
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{
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return readl(adata->ioreg + addr);
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}
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EXPORT_SYMBOL_GPL(anatop_read_reg);
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void anatop_write_reg(struct anatop *adata, u32 addr, u32 data, u32 mask)
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{
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u32 val;
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data &= mask;
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spin_lock(&adata->reglock);
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val = readl(adata->ioreg + addr);
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val &= ~mask;
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val |= data;
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writel(val, adata->ioreg + addr);
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spin_unlock(&adata->reglock);
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}
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EXPORT_SYMBOL_GPL(anatop_write_reg);
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static const struct of_device_id of_anatop_match[] = {
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{ .compatible = "fsl,imx6q-anatop", },
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{ },
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};
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static int __devinit of_anatop_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct device_node *np = dev->of_node;
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void *ioreg;
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struct anatop *drvdata;
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ioreg = of_iomap(np, 0);
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if (!ioreg)
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return -EADDRNOTAVAIL;
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drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
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if (!drvdata)
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return -ENOMEM;
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drvdata->ioreg = ioreg;
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spin_lock_init(&drvdata->reglock);
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platform_set_drvdata(pdev, drvdata);
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of_platform_populate(np, of_anatop_match, NULL, dev);
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return 0;
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}
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static int __devexit of_anatop_remove(struct platform_device *pdev)
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{
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struct anatop *drvdata;
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drvdata = platform_get_drvdata(pdev);
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iounmap(drvdata->ioreg);
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return 0;
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}
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static struct platform_driver anatop_of_driver = {
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.driver = {
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.name = "anatop-mfd",
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.owner = THIS_MODULE,
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.of_match_table = of_anatop_match,
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},
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.probe = of_anatop_probe,
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.remove = of_anatop_remove,
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};
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static int __init anatop_init(void)
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{
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return platform_driver_register(&anatop_of_driver);
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}
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postcore_initcall(anatop_init);
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static void __exit anatop_exit(void)
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{
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platform_driver_unregister(&anatop_of_driver);
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}
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module_exit(anatop_exit);
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MODULE_AUTHOR("Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>");
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MODULE_DESCRIPTION("ANATOP MFD driver");
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MODULE_LICENSE("GPL v2");
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