PCI/pwrctl: Create platform devices for child OF nodes of the port node
In preparation for introducing PCI device power control - a set of library functions that will allow powering-up of PCI devices before they're detected on the PCI bus - we need to populate the devices defined on the device-tree. We are reusing the platform bus as it provides us with all the infrastructure we need to match the pwrctl drivers against the compatibles from OF nodes. These platform devices will be probed by the driver core and bound to the PCI pwrctl drivers we'll introduce later. Tested-by: Amit Pundir <amit.pundir@linaro.org> Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD, SM8650-QRD & SM8650-HDK Tested-by: Caleb Connolly <caleb.connolly@linaro.org> # OnePlus 8T Acked-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://lore.kernel.org/r/20240612082019.19161-4-brgl@bgdev.pl Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
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@ -12,6 +12,7 @@
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/proc_fs.h>
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#include <linux/slab.h>
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@ -354,6 +355,14 @@ void pci_bus_add_device(struct pci_dev *dev)
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pci_warn(dev, "device attach failed (%d)\n", retval);
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pci_dev_assign_added(dev, true);
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if (pci_is_bridge(dev)) {
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retval = of_platform_populate(dev->dev.of_node, NULL, NULL,
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&dev->dev);
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if (retval)
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pci_err(dev, "failed to populate child OF nodes (%d)\n",
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retval);
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}
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}
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EXPORT_SYMBOL_GPL(pci_bus_add_device);
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@ -1,6 +1,7 @@
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/pci.h>
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include "pci.h"
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static void pci_free_resources(struct pci_dev *dev)
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@ -18,7 +19,7 @@ static void pci_stop_dev(struct pci_dev *dev)
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pci_pme_active(dev, false);
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if (pci_dev_is_added(dev)) {
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of_platform_depopulate(&dev->dev);
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device_release_driver(&dev->dev);
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pci_proc_detach_device(dev);
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pci_remove_sysfs_dev_files(dev);
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