Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 55 insertions, 0 deletions

diff --git a/drivers/spi/spi-loongson-pci.c b/drivers/spi/spi-loongson-pci.c
new file mode 100644
index 0000000000..134cda0c13
--- /dev/null
+++ b/drivers/spi/spi-loongson-pci.c
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0+
+// PCI interface driver for Loongson SPI Support
+// Copyright (C) 2023 Loongson Technology Corporation Limited
+
+#include <linux/mod_devicetable.h>
+#include <linux/pci.h>
+
+#include "spi-loongson.h"
+
+static int loongson_spi_pci_register(struct pci_dev *pdev,
+			const struct pci_device_id *ent)
+{
+	int ret;
+	void __iomem *reg_base;
+	struct device *dev = &pdev->dev;
+	int pci_bar = 0;
+
+	ret = pcim_enable_device(pdev);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "cannot enable pci device\n");
+
+	ret = pcim_iomap_regions(pdev, BIT(pci_bar), pci_name(pdev));
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to request and remap memory\n");
+
+	reg_base = pcim_iomap_table(pdev)[pci_bar];
+
+	ret = loongson_spi_init_controller(dev, reg_base);
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to initialize controller\n");
+
+	return 0;
+}
+
+static struct pci_device_id loongson_spi_devices[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_LOONGSON, 0x7a0b) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_LOONGSON, 0x7a1b) },
+	{ }
+};
+MODULE_DEVICE_TABLE(pci, loongson_spi_devices);
+
+static struct pci_driver loongson_spi_pci_driver = {
+	.name       = "loongson-spi-pci",
+	.id_table   = loongson_spi_devices,
+	.probe      = loongson_spi_pci_register,
+	.driver	= {
+		.bus = &pci_bus_type,
+		.pm = &loongson_spi_dev_pm_ops,
+	},
+};
+module_pci_driver(loongson_spi_pci_driver);
+
+MODULE_DESCRIPTION("Loongson spi pci driver");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(SPI_LOONGSON_CORE);