drivers/mtd/nand/onenand/generic.c
Source file repositories/reference/linux-study-clean/drivers/mtd/nand/onenand/generic.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/mtd/nand/onenand/generic.c- Extension
.c- Size
- 2761 bytes
- Lines
- 116
- Domain
- Driver Families
- Bucket
- drivers/mtd
- 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.
- 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.
- Allocates kernel memory; connect allocation flags and lifetime to context constraints.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/module.hlinux/slab.hlinux/platform_device.hlinux/mtd/mtd.hlinux/mtd/onenand.hlinux/mtd/partitions.hlinux/io.h
Detected Declarations
struct onenand_infofunction generic_onenand_probefunction generic_onenand_remove
Annotated Snippet
struct onenand_info {
struct mtd_info mtd;
struct onenand_chip onenand;
};
static int generic_onenand_probe(struct platform_device *pdev)
{
struct onenand_info *info;
struct onenand_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct resource *res = pdev->resource;
unsigned long size = resource_size(res);
int err;
info = kzalloc_obj(struct onenand_info);
if (!info)
return -ENOMEM;
if (!request_mem_region(res->start, size, dev_name(&pdev->dev))) {
err = -EBUSY;
goto out_free_info;
}
info->onenand.base = ioremap(res->start, size);
if (!info->onenand.base) {
err = -ENOMEM;
goto out_release_mem_region;
}
info->onenand.mmcontrol = pdata ? pdata->mmcontrol : NULL;
err = platform_get_irq(pdev, 0);
if (err < 0)
goto out_iounmap;
info->onenand.irq = err;
info->mtd.dev.parent = &pdev->dev;
info->mtd.priv = &info->onenand;
if (onenand_scan(&info->mtd, 1)) {
err = -ENXIO;
goto out_iounmap;
}
err = mtd_device_register(&info->mtd, pdata ? pdata->parts : NULL,
pdata ? pdata->nr_parts : 0);
platform_set_drvdata(pdev, info);
return 0;
out_iounmap:
iounmap(info->onenand.base);
out_release_mem_region:
release_mem_region(res->start, size);
out_free_info:
kfree(info);
return err;
}
static void generic_onenand_remove(struct platform_device *pdev)
{
struct onenand_info *info = platform_get_drvdata(pdev);
struct resource *res = pdev->resource;
unsigned long size = resource_size(res);
if (info) {
onenand_release(&info->mtd);
release_mem_region(res->start, size);
iounmap(info->onenand.base);
kfree(info);
}
}
static struct platform_driver generic_onenand_driver = {
.driver = {
.name = DRIVER_NAME,
},
.probe = generic_onenand_probe,
.remove = generic_onenand_remove,
};
module_platform_driver(generic_onenand_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
MODULE_DESCRIPTION("Glue layer for OneNAND flash on generic boards");
MODULE_ALIAS("platform:" DRIVER_NAME);
Annotation
- Immediate include surface: `linux/module.h`, `linux/slab.h`, `linux/platform_device.h`, `linux/mtd/mtd.h`, `linux/mtd/onenand.h`, `linux/mtd/partitions.h`, `linux/io.h`.
- Detected declarations: `struct onenand_info`, `function generic_onenand_probe`, `function generic_onenand_remove`.
- Atlas domain: Driver Families / drivers/mtd.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.