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This bus driver supports the Loongson SPI hardware controller in the Loongson platforms and supports the use DTS and PCI framework to register SPI device resources. Signed-off-by: Yinbo Zhu <zhuyinbo@loongson.cn> Cc: Andy Shevchenko <andy.shevchenko@gmail.com> Cc: Mark Brown <broonie@kernel.org> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20230613075834.5219-3-zhuyinbo@loongson.cn Signed-off-by: Mark Brown <broonie@kernel.org>
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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// PCI interface driver for Loongson SPI Support
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// Copyright (C) 2023 Loongson Technology Corporation Limited
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#include <linux/mod_devicetable.h>
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#include <linux/pci.h>
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#include "spi-loongson.h"
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static int loongson_spi_pci_register(struct pci_dev *pdev,
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const struct pci_device_id *ent)
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{
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int ret;
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void __iomem *reg_base;
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struct device *dev = &pdev->dev;
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int pci_bar = 0;
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ret = pcim_enable_device(pdev);
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if (ret < 0)
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return dev_err_probe(dev, ret, "cannot enable pci device\n");
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ret = pcim_iomap_regions(pdev, BIT(pci_bar), pci_name(pdev));
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if (ret)
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return dev_err_probe(dev, ret, "failed to request and remap memory\n");
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reg_base = pcim_iomap_table(pdev)[pci_bar];
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ret = loongson_spi_init_controller(dev, reg_base);
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if (ret)
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return dev_err_probe(dev, ret, "failed to initialize controller\n");
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return 0;
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}
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static struct pci_device_id loongson_spi_devices[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_LOONGSON, 0x7a0b) },
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{ PCI_DEVICE(PCI_VENDOR_ID_LOONGSON, 0x7a1b) },
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{ }
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};
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MODULE_DEVICE_TABLE(pci, loongson_spi_devices);
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static struct pci_driver loongson_spi_pci_driver = {
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.name = "loongson-spi-pci",
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.id_table = loongson_spi_devices,
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.probe = loongson_spi_pci_register,
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.driver = {
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.bus = &pci_bus_type,
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.pm = &loongson_spi_dev_pm_ops,
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},
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};
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module_pci_driver(loongson_spi_pci_driver);
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MODULE_DESCRIPTION("Loongson spi pci driver");
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MODULE_LICENSE("GPL");
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MODULE_IMPORT_NS(SPI_LOONGSON_CORE);
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