drivers/spi/spi-loongson-plat.c

Source file repositories/reference/linux-study-clean/drivers/spi/spi-loongson-plat.c

File Facts

System
Linux kernel
Corpus path
drivers/spi/spi-loongson-plat.c
Extension
.c
Size
1236 bytes
Lines
48
Domain
Driver Families
Bucket
drivers/spi
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0+
// Platform driver for Loongson SPI Support
// Copyright (C) 2023 Loongson Technology Corporation Limited

#include <linux/err.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>

#include "spi-loongson.h"

static int loongson_spi_platform_probe(struct platform_device *pdev)
{
	int ret;
	void __iomem *reg_base;
	struct device *dev = &pdev->dev;

	reg_base = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(reg_base))
		return PTR_ERR(reg_base);

	ret = loongson_spi_init_controller(dev, reg_base);
	if (ret)
		return dev_err_probe(dev, ret, "failed to initialize controller\n");

	return 0;
}

static const struct of_device_id loongson_spi_id_table[] = {
	{ .compatible = "loongson,ls2k1000-spi" },
	{ }
};
MODULE_DEVICE_TABLE(of, loongson_spi_id_table);

static struct platform_driver loongson_spi_plat_driver = {
	.probe = loongson_spi_platform_probe,
	.driver	= {
		.name	= "loongson-spi",
		.bus = &platform_bus_type,
		.pm = &loongson_spi_dev_pm_ops,
		.of_match_table = loongson_spi_id_table,
	},
};
module_platform_driver(loongson_spi_plat_driver);

MODULE_DESCRIPTION("Loongson spi platform driver");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS("SPI_LOONGSON_CORE");

Annotation

Implementation Notes