Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 176 insertions, 0 deletions

diff --git a/drivers/i2c/busses/i2c-pxa-pci.c b/drivers/i2c/busses/i2c-pxa-pci.c
new file mode 100644
index 000000000000..6659d269b841
--- /dev/null
+++ b/drivers/i2c/busses/i2c-pxa-pci.c
@@ -0,0 +1,176 @@
+/*
+ * The CE4100's I2C device is more or less the same one as found on PXA.
+ * It does not support slave mode, the register slightly moved. This PCI
+ * device provides three bars, every contains a single I2C controller.
+ */
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/i2c/pxa-i2c.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+
+#define CE4100_PCI_I2C_DEVS     3
+
+struct ce4100_devices {
+        struct platform_device *pdev[CE4100_PCI_I2C_DEVS];
+};
+
+static struct platform_device *add_i2c_device(struct pci_dev *dev, int bar)
+{
+        struct platform_device *pdev;
+        struct i2c_pxa_platform_data pdata;
+        struct resource res[2];
+        struct device_node *child;
+        static int devnum;
+        int ret;
+
+        memset(&pdata, 0, sizeof(struct i2c_pxa_platform_data));
+        memset(&res, 0, sizeof(res));
+
+        res[0].flags = IORESOURCE_MEM;
+        res[0].start = pci_resource_start(dev, bar);
+        res[0].end = pci_resource_end(dev, bar);
+
+        res[1].flags = IORESOURCE_IRQ;
+        res[1].start = dev->irq;
+        res[1].end = dev->irq;
+
+        for_each_child_of_node(dev->dev.of_node, child) {
+                const void *prop;
+                struct resource r;
+                int ret;
+
+                ret = of_address_to_resource(child, 0, &r);
+                if (ret < 0)
+                        continue;
+                if (r.start != res[0].start)
+                        continue;
+                if (r.end != res[0].end)
+                        continue;
+                if (r.flags != res[0].flags)
+                        continue;
+
+                prop = of_get_property(child, "fast-mode", NULL);
+                if (prop)
+                        pdata.fast_mode = 1;
+
+                break;
+        }
+
+        if (!child) {
+                dev_err(&dev->dev, "failed to match a DT node for bar %d.\n",
+                                bar);
+                ret = -EINVAL;
+                goto out;
+        }
+
+        pdev = platform_device_alloc("ce4100-i2c", devnum);
+        if (!pdev) {
+                of_node_put(child);
+                ret = -ENOMEM;
+                goto out;
+        }
+        pdev->dev.parent = &dev->dev;
+        pdev->dev.of_node = child;
+
+        ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
+        if (ret)
+                goto err;
+
+        ret = platform_device_add_data(pdev, &pdata, sizeof(pdata));
+        if (ret)
+                goto err;
+
+        ret = platform_device_add(pdev);
+        if (ret)
+                goto err;
+        devnum++;
+        return pdev;
+err:
+        platform_device_put(pdev);
+out:
+        return ERR_PTR(ret);
+}
+
+static int __devinit ce4100_i2c_probe(struct pci_dev *dev,
+                const struct pci_device_id *ent)
+{
+        int ret;
+        int i;
+        struct ce4100_devices *sds;
+
+        ret = pci_enable_device_mem(dev);
+        if (ret)
+                return ret;
+
+        if (!dev->dev.of_node) {
+                dev_err(&dev->dev, "Missing device tree node.\n");
+                return -EINVAL;
+        }
+        sds = kzalloc(sizeof(*sds), GFP_KERNEL);
+        if (!sds)
+                goto err_mem;
+
+        for (i = 0; i < ARRAY_SIZE(sds->pdev); i++) {
+                sds->pdev[i] = add_i2c_device(dev, i);
+                if (IS_ERR(sds->pdev[i])) {
+                        while (--i >= 0)
+                                platform_device_unregister(sds->pdev[i]);
+                        goto err_dev_add;
+                }
+        }
+        pci_set_drvdata(dev, sds);
+        return 0;
+
+err_dev_add:
+        pci_set_drvdata(dev, NULL);
+        kfree(sds);
+err_mem:
+        pci_disable_device(dev);
+        return ret;
+}
+
+static void __devexit ce4100_i2c_remove(struct pci_dev *dev)
+{
+        struct ce4100_devices *sds;
+        unsigned int i;
+
+        sds = pci_get_drvdata(dev);
+        pci_set_drvdata(dev, NULL);
+
+        for (i = 0; i < ARRAY_SIZE(sds->pdev); i++)
+                platform_device_unregister(sds->pdev[i]);
+
+        pci_disable_device(dev);
+        kfree(sds);
+}
+
+static struct pci_device_id ce4100_i2c_devices[] __devinitdata = {
+        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2e68)},
+        { },
+};
+MODULE_DEVICE_TABLE(pci, ce4100_i2c_devices);
+
+static struct pci_driver ce4100_i2c_driver = {
+        .name           = "ce4100_i2c",
+        .id_table       = ce4100_i2c_devices,
+        .probe          = ce4100_i2c_probe,
+        .remove         = __devexit_p(ce4100_i2c_remove),
+};
+
+static int __init ce4100_i2c_init(void)
+{
+        return pci_register_driver(&ce4100_i2c_driver);
+}
+module_init(ce4100_i2c_init);
+
+static void __exit ce4100_i2c_exit(void)
+{
+        pci_unregister_driver(&ce4100_i2c_driver);
+}
+module_exit(ce4100_i2c_exit);
+
+MODULE_DESCRIPTION("CE4100 PCI-I2C glue code for PXA's driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");