2 * The CE4100's I2C device is more or less the same one as found on PXA.
3 * It does not support slave mode, the register slightly moved. This PCI
4 * device provides three bars, every contains a single I2C controller.
6 #include <linux/module.h>
8 #include <linux/platform_device.h>
9 #include <linux/i2c/pxa-i2c.h>
11 #include <linux/of_device.h>
12 #include <linux/of_address.h>
14 #define CE4100_PCI_I2C_DEVS 3
16 struct ce4100_devices {
17 struct platform_device *pdev[CE4100_PCI_I2C_DEVS];
20 static struct platform_device *add_i2c_device(struct pci_dev *dev, int bar)
22 struct platform_device *pdev;
23 struct i2c_pxa_platform_data pdata;
24 struct resource res[2];
25 struct device_node *child;
29 memset(&pdata, 0, sizeof(struct i2c_pxa_platform_data));
30 memset(&res, 0, sizeof(res));
32 res[0].flags = IORESOURCE_MEM;
33 res[0].start = pci_resource_start(dev, bar);
34 res[0].end = pci_resource_end(dev, bar);
36 res[1].flags = IORESOURCE_IRQ;
37 res[1].start = dev->irq;
38 res[1].end = dev->irq;
40 for_each_child_of_node(dev->dev.of_node, child) {
45 ret = of_address_to_resource(child, 0, &r);
48 if (r.start != res[0].start)
50 if (r.end != res[0].end)
52 if (r.flags != res[0].flags)
55 prop = of_get_property(child, "fast-mode", NULL);
63 dev_err(&dev->dev, "failed to match a DT node for bar %d.\n",
69 pdev = platform_device_alloc("ce4100-i2c", devnum);
75 pdev->dev.parent = &dev->dev;
76 pdev->dev.of_node = child;
78 ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
82 ret = platform_device_add_data(pdev, &pdata, sizeof(pdata));
86 ret = platform_device_add(pdev);
92 platform_device_put(pdev);
97 static int __devinit ce4100_i2c_probe(struct pci_dev *dev,
98 const struct pci_device_id *ent)
102 struct ce4100_devices *sds;
104 ret = pci_enable_device_mem(dev);
108 if (!dev->dev.of_node) {
109 dev_err(&dev->dev, "Missing device tree node.\n");
112 sds = kzalloc(sizeof(*sds), GFP_KERNEL);
118 for (i = 0; i < ARRAY_SIZE(sds->pdev); i++) {
119 sds->pdev[i] = add_i2c_device(dev, i);
120 if (IS_ERR(sds->pdev[i])) {
121 ret = PTR_ERR(sds->pdev[i]);
123 platform_device_unregister(sds->pdev[i]);
127 pci_set_drvdata(dev, sds);
131 pci_set_drvdata(dev, NULL);
134 pci_disable_device(dev);
138 static void __devexit ce4100_i2c_remove(struct pci_dev *dev)
140 struct ce4100_devices *sds;
143 sds = pci_get_drvdata(dev);
144 pci_set_drvdata(dev, NULL);
146 for (i = 0; i < ARRAY_SIZE(sds->pdev); i++)
147 platform_device_unregister(sds->pdev[i]);
149 pci_disable_device(dev);
153 static struct pci_device_id ce4100_i2c_devices[] __devinitdata = {
154 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2e68)},
157 MODULE_DEVICE_TABLE(pci, ce4100_i2c_devices);
159 static struct pci_driver ce4100_i2c_driver = {
160 .name = "ce4100_i2c",
161 .id_table = ce4100_i2c_devices,
162 .probe = ce4100_i2c_probe,
163 .remove = __devexit_p(ce4100_i2c_remove),
166 static int __init ce4100_i2c_init(void)
168 return pci_register_driver(&ce4100_i2c_driver);
170 module_init(ce4100_i2c_init);
172 static void __exit ce4100_i2c_exit(void)
174 pci_unregister_driver(&ce4100_i2c_driver);
176 module_exit(ce4100_i2c_exit);
178 MODULE_DESCRIPTION("CE4100 PCI-I2C glue code for PXA's driver");
179 MODULE_LICENSE("GPL v2");
180 MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");