fd774e36fe
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> Signed-off-by: Dave Jiang <dave.jiang@intel.com>
110 lines
2.6 KiB
C
110 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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#define pr_fmt(fmt) "of_pmem: " fmt
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#include <linux/of.h>
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#include <linux/libnvdimm.h>
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#include <linux/module.h>
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#include <linux/ioport.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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struct of_pmem_private {
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struct nvdimm_bus_descriptor bus_desc;
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struct nvdimm_bus *bus;
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};
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static int of_pmem_region_probe(struct platform_device *pdev)
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{
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struct of_pmem_private *priv;
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struct device_node *np;
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struct nvdimm_bus *bus;
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bool is_volatile;
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int i;
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np = dev_of_node(&pdev->dev);
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if (!np)
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return -ENXIO;
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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priv->bus_desc.provider_name = kstrdup(pdev->name, GFP_KERNEL);
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priv->bus_desc.module = THIS_MODULE;
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priv->bus_desc.of_node = np;
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priv->bus = bus = nvdimm_bus_register(&pdev->dev, &priv->bus_desc);
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if (!bus) {
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kfree(priv);
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return -ENODEV;
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}
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platform_set_drvdata(pdev, priv);
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is_volatile = !!of_find_property(np, "volatile", NULL);
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dev_dbg(&pdev->dev, "Registering %s regions from %pOF\n",
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is_volatile ? "volatile" : "non-volatile", np);
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for (i = 0; i < pdev->num_resources; i++) {
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struct nd_region_desc ndr_desc;
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struct nd_region *region;
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/*
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* NB: libnvdimm copies the data from ndr_desc into it's own
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* structures so passing a stack pointer is fine.
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*/
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memset(&ndr_desc, 0, sizeof(ndr_desc));
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ndr_desc.numa_node = dev_to_node(&pdev->dev);
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ndr_desc.target_node = ndr_desc.numa_node;
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ndr_desc.res = &pdev->resource[i];
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ndr_desc.of_node = np;
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set_bit(ND_REGION_PAGEMAP, &ndr_desc.flags);
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if (is_volatile)
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region = nvdimm_volatile_region_create(bus, &ndr_desc);
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else {
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set_bit(ND_REGION_PERSIST_MEMCTRL, &ndr_desc.flags);
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region = nvdimm_pmem_region_create(bus, &ndr_desc);
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}
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if (!region)
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dev_warn(&pdev->dev, "Unable to register region %pR from %pOF\n",
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ndr_desc.res, np);
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else
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dev_dbg(&pdev->dev, "Registered region %pR from %pOF\n",
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ndr_desc.res, np);
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}
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return 0;
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}
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static int of_pmem_region_remove(struct platform_device *pdev)
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{
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struct of_pmem_private *priv = platform_get_drvdata(pdev);
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nvdimm_bus_unregister(priv->bus);
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kfree(priv);
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return 0;
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}
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static const struct of_device_id of_pmem_region_match[] = {
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{ .compatible = "pmem-region" },
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{ .compatible = "pmem-region-v2" },
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{ },
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};
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static struct platform_driver of_pmem_region_driver = {
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.probe = of_pmem_region_probe,
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.remove = of_pmem_region_remove,
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.driver = {
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.name = "of_pmem",
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.of_match_table = of_pmem_region_match,
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},
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};
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module_platform_driver(of_pmem_region_driver);
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MODULE_DEVICE_TABLE(of, of_pmem_region_match);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("IBM Corporation");
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