Add "pci-epf-bus" driver that helps to create EPF device from
device tree. This is added in order to define an endpoint function
device completely from device tree.
Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx>
---
drivers/pci/endpoint/Makefile | 3 +-
drivers/pci/endpoint/pci-epf-bus.c | 54 ++++++++++++++++++++++++++++++
2 files changed, 56 insertions(+), 1 deletion(-)
create mode 100644 drivers/pci/endpoint/pci-epf-bus.c
diff --git a/drivers/pci/endpoint/Makefile b/drivers/pci/endpoint/Makefile
index 95b2fe47e3b0..36cf33cf975c 100644
--- a/drivers/pci/endpoint/Makefile
+++ b/drivers/pci/endpoint/Makefile
@@ -5,4 +5,5 @@
obj-$(CONFIG_PCI_ENDPOINT_CONFIGFS) += pci-ep-cfs.o
obj-$(CONFIG_PCI_ENDPOINT) += pci-epc-core.o pci-epf-core.o\
- pci-epc-mem.o functions/
+ pci-epc-mem.o pci-epf-bus.o \
+ functions/
diff --git a/drivers/pci/endpoint/pci-epf-bus.c b/drivers/pci/endpoint/pci-epf-bus.c
new file mode 100644
index 000000000000..b6ab1479b79e
--- /dev/null
+++ b/drivers/pci/endpoint/pci-epf-bus.c
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * PCI Endpoint *Function* Bus Driver
+ *
+ * Copyright (C) 2020 Texas Instruments
+ * Author: Kishon Vijay Abraham I <kishon@xxxxxx>
+ */
+
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/pci-epf.h>
+#include <linux/platform_device.h>
+
+static int pci_epf_bus_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *node = of_node_get(dev->of_node);
+ struct device_node *child;
+ struct pci_epf *epf;
+
+ for_each_child_of_node(node, child) {
+ epf = devm_pci_epf_of_create(dev, child);
+ if (IS_ERR(epf)) {
+ dev_err(dev, "Failed to create PCI EPF device %s\n",
+ node->full_name);
+ of_node_put(child);
+ break;
+ }
+ }
+ of_node_put(node);
+
+ return 0;
+}
+
+static const struct of_device_id pci_epf_bus_id_table[] = {
+ { .compatible = "pci-epf-bus" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, pci_epf_bus_id_table);
+
+static struct platform_driver pci_epf_bus_driver = {
+ .probe = pci_epf_bus_probe,
+ .driver = {
+ .name = "pci-epf-bus",
+ .of_match_table = of_match_ptr(pci_epf_bus_id_table),
+ },
+};
+
+module_platform_driver(pci_epf_bus_driver);
+
+MODULE_AUTHOR("Texas Instruments Inc.");
+MODULE_DESCRIPTION("PCI EPF Bus Driver");
+MODULE_LICENSE("GPL v2");
--
2.17.1
