4 * Copyright (C) 2012 Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
5 * Copyright (C) 2012 Linaro
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.
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.
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.
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.
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.
37 #include <linux/module.h>
38 #include <linux/platform_device.h>
40 #include <linux/of_platform.h>
41 #include <linux/of_address.h>
42 #include <linux/mfd/anatop.h>
44 u32
anatop_get_bits(struct anatop
*adata
, u32 addr
, int bit_shift
,
52 mask
= (1 << bit_width
) - 1;
54 val
= readl(adata
->ioreg
+ addr
);
55 val
= (val
>> bit_shift
) & mask
;
59 EXPORT_SYMBOL_GPL(anatop_get_bits
);
61 void anatop_set_bits(struct anatop
*adata
, u32 addr
, int bit_shift
,
62 int bit_width
, u32 data
)
69 mask
= (1 << bit_width
) - 1;
71 spin_lock(&adata
->reglock
);
72 val
= readl(adata
->ioreg
+ addr
) & ~(mask
<< bit_shift
);
73 writel((data
<< bit_shift
) | val
, adata
->ioreg
+ addr
);
74 spin_unlock(&adata
->reglock
);
76 EXPORT_SYMBOL_GPL(anatop_set_bits
);
78 static const struct of_device_id of_anatop_match
[] = {
79 { .compatible
= "fsl,imx6q-anatop", },
83 static int __devinit
of_anatop_probe(struct platform_device
*pdev
)
85 struct device
*dev
= &pdev
->dev
;
86 struct device_node
*np
= dev
->of_node
;
88 struct anatop
*drvdata
;
90 ioreg
= of_iomap(np
, 0);
92 return -EADDRNOTAVAIL
;
93 drvdata
= devm_kzalloc(dev
, sizeof(*drvdata
), GFP_KERNEL
);
96 drvdata
->ioreg
= ioreg
;
97 spin_lock_init(&drvdata
->reglock
);
98 platform_set_drvdata(pdev
, drvdata
);
99 of_platform_populate(np
, of_anatop_match
, NULL
, dev
);
104 static int __devexit
of_anatop_remove(struct platform_device
*pdev
)
106 struct anatop
*drvdata
;
107 drvdata
= platform_get_drvdata(pdev
);
108 iounmap(drvdata
->ioreg
);
113 static struct platform_driver anatop_of_driver
= {
115 .name
= "anatop-mfd",
116 .owner
= THIS_MODULE
,
117 .of_match_table
= of_anatop_match
,
119 .probe
= of_anatop_probe
,
120 .remove
= of_anatop_remove
,
123 static int __init
anatop_init(void)
125 return platform_driver_register(&anatop_of_driver
);
127 postcore_initcall(anatop_init
);
129 static void __exit
anatop_exit(void)
131 platform_driver_unregister(&anatop_of_driver
);
133 module_exit(anatop_exit
);
135 MODULE_AUTHOR("Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>");
136 MODULE_DESCRIPTION("ANATOP MFD driver");
137 MODULE_LICENSE("GPL v2");