mfd: Fix twl-core oops while calling twl_i2c_* for unbound driver
[linux-2.6.git] / drivers / mfd / rdc321x-southbridge.c
1 /*
2  * RDC321x MFD southbrige driver
3  *
4  * Copyright (C) 2007-2010 Florian Fainelli <florian@openwrt.org>
5  * Copyright (C) 2010 Bernhard Loos <bernhardloos@googlemail.com>
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
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20  *
21  */
22 #include <linux/init.h>
23 #include <linux/module.h>
24 #include <linux/kernel.h>
25 #include <linux/platform_device.h>
26 #include <linux/pci.h>
27 #include <linux/mfd/core.h>
28 #include <linux/mfd/rdc321x.h>
29
30 static struct rdc321x_wdt_pdata rdc321x_wdt_pdata;
31
32 static struct resource rdc321x_wdt_resource[] = {
33         {
34                 .name   = "wdt-reg",
35                 .start  = RDC321X_WDT_CTRL,
36                 .end    = RDC321X_WDT_CTRL + 0x3,
37                 .flags  = IORESOURCE_IO,
38         }
39 };
40
41 static struct rdc321x_gpio_pdata rdc321x_gpio_pdata = {
42         .max_gpios      = RDC321X_MAX_GPIO,
43 };
44
45 static struct resource rdc321x_gpio_resources[] = {
46         {
47                 .name   = "gpio-reg1",
48                 .start  = RDC321X_GPIO_CTRL_REG1,
49                 .end    = RDC321X_GPIO_CTRL_REG1 + 0x7,
50                 .flags  = IORESOURCE_IO,
51         }, {
52                 .name   = "gpio-reg2",
53                 .start  = RDC321X_GPIO_CTRL_REG2,
54                 .end    = RDC321X_GPIO_CTRL_REG2 + 0x7,
55                 .flags  = IORESOURCE_IO,
56         }
57 };
58
59 static struct mfd_cell rdc321x_sb_cells[] = {
60         {
61                 .name           = "rdc321x-wdt",
62                 .resources      = rdc321x_wdt_resource,
63                 .num_resources  = ARRAY_SIZE(rdc321x_wdt_resource),
64                 .platform_data  = &rdc321x_wdt_pdata,
65                 .pdata_size     = sizeof(rdc321x_wdt_pdata),
66         }, {
67                 .name           = "rdc321x-gpio",
68                 .resources      = rdc321x_gpio_resources,
69                 .num_resources  = ARRAY_SIZE(rdc321x_gpio_resources),
70                 .platform_data  = &rdc321x_gpio_pdata,
71                 .pdata_size     = sizeof(rdc321x_gpio_pdata),
72         },
73 };
74
75 static int __devinit rdc321x_sb_probe(struct pci_dev *pdev,
76                                         const struct pci_device_id *ent)
77 {
78         int err;
79
80         err = pci_enable_device(pdev);
81         if (err) {
82                 dev_err(&pdev->dev, "failed to enable device\n");
83                 return err;
84         }
85
86         rdc321x_gpio_pdata.sb_pdev = pdev;
87         rdc321x_wdt_pdata.sb_pdev = pdev;
88
89         return mfd_add_devices(&pdev->dev, -1,
90                 rdc321x_sb_cells, ARRAY_SIZE(rdc321x_sb_cells), NULL, 0);
91 }
92
93 static void __devexit rdc321x_sb_remove(struct pci_dev *pdev)
94 {
95         mfd_remove_devices(&pdev->dev);
96 }
97
98 static DEFINE_PCI_DEVICE_TABLE(rdc321x_sb_table) = {
99         { PCI_DEVICE(PCI_VENDOR_ID_RDC, PCI_DEVICE_ID_RDC_R6030) },
100         {}
101 };
102 MODULE_DEVICE_TABLE(pci, rdc321x_sb_table);
103
104 static struct pci_driver rdc321x_sb_driver = {
105         .name           = "RDC321x Southbridge",
106         .id_table       = rdc321x_sb_table,
107         .probe          = rdc321x_sb_probe,
108         .remove         = __devexit_p(rdc321x_sb_remove),
109 };
110
111 static int __init rdc321x_sb_init(void)
112 {
113         return pci_register_driver(&rdc321x_sb_driver);
114 }
115
116 static void __exit rdc321x_sb_exit(void)
117 {
118         pci_unregister_driver(&rdc321x_sb_driver);
119 }
120
121 module_init(rdc321x_sb_init);
122 module_exit(rdc321x_sb_exit);
123
124 MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
125 MODULE_LICENSE("GPL");
126 MODULE_DESCRIPTION("RDC R-321x MFD southbridge driver");