mirror of
https://github.com/torvalds/linux.git
synced 2024-11-22 20:22:09 +00:00
6c7a864007
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+
|
|
// 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);
|