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59738ab266
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Signed-off-by: Rob Herring <robh@kernel.org> Reviewed-by: Andi Shyti <andi.shyti@kernel.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>
149 lines
3.2 KiB
C
149 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* CE4100 PCI-I2C glue code for PXA's driver
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* Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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*
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* The CE4100's I2C device is more or less the same one as found on PXA.
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* It does not support slave mode, the register slightly moved. This PCI
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* device provides three bars, every contains a single I2C controller.
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*/
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/platform_device.h>
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#include <linux/platform_data/i2c-pxa.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#define CE4100_PCI_I2C_DEVS 3
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struct ce4100_devices {
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struct platform_device *pdev[CE4100_PCI_I2C_DEVS];
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};
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static struct platform_device *add_i2c_device(struct pci_dev *dev, int bar)
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{
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struct platform_device *pdev;
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struct i2c_pxa_platform_data pdata;
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struct resource res[2];
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struct device_node *child;
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static int devnum;
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int ret;
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memset(&pdata, 0, sizeof(struct i2c_pxa_platform_data));
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memset(&res, 0, sizeof(res));
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res[0].flags = IORESOURCE_MEM;
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res[0].start = pci_resource_start(dev, bar);
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res[0].end = pci_resource_end(dev, bar);
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res[1].flags = IORESOURCE_IRQ;
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res[1].start = dev->irq;
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res[1].end = dev->irq;
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for_each_child_of_node(dev->dev.of_node, child) {
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const void *prop;
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struct resource r;
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int ret;
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ret = of_address_to_resource(child, 0, &r);
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if (ret < 0)
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continue;
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if (r.start != res[0].start)
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continue;
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if (r.end != res[0].end)
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continue;
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if (r.flags != res[0].flags)
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continue;
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prop = of_get_property(child, "fast-mode", NULL);
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if (prop)
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pdata.fast_mode = 1;
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break;
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}
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if (!child) {
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dev_err(&dev->dev, "failed to match a DT node for bar %d.\n",
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bar);
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ret = -EINVAL;
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goto out;
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}
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pdev = platform_device_alloc("ce4100-i2c", devnum);
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if (!pdev) {
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of_node_put(child);
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ret = -ENOMEM;
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goto out;
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}
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pdev->dev.parent = &dev->dev;
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pdev->dev.of_node = child;
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ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
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if (ret)
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goto err;
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ret = platform_device_add_data(pdev, &pdata, sizeof(pdata));
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if (ret)
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goto err;
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ret = platform_device_add(pdev);
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if (ret)
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goto err;
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devnum++;
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return pdev;
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err:
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platform_device_put(pdev);
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out:
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return ERR_PTR(ret);
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}
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static int ce4100_i2c_probe(struct pci_dev *dev,
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const struct pci_device_id *ent)
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{
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int ret;
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int i;
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struct ce4100_devices *sds;
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ret = pcim_enable_device(dev);
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if (ret)
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return ret;
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if (!dev->dev.of_node) {
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dev_err(&dev->dev, "Missing device tree node.\n");
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return -EINVAL;
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}
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sds = kzalloc(sizeof(*sds), GFP_KERNEL);
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if (!sds)
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return -ENOMEM;
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for (i = 0; i < ARRAY_SIZE(sds->pdev); i++) {
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sds->pdev[i] = add_i2c_device(dev, i);
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if (IS_ERR(sds->pdev[i])) {
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ret = PTR_ERR(sds->pdev[i]);
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while (--i >= 0)
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platform_device_unregister(sds->pdev[i]);
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goto err_dev_add;
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}
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}
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pci_set_drvdata(dev, sds);
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return 0;
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err_dev_add:
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kfree(sds);
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return ret;
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}
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static const struct pci_device_id ce4100_i2c_devices[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2e68)},
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{ },
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};
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static struct pci_driver ce4100_i2c_driver = {
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.driver = {
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.suppress_bind_attrs = true,
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},
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.name = "ce4100_i2c",
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.id_table = ce4100_i2c_devices,
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.probe = ce4100_i2c_probe,
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};
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builtin_pci_driver(ce4100_i2c_driver);
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