drivers/mfd/rsmu_core.c
Source file repositories/reference/linux-study-clean/drivers/mfd/rsmu_core.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/mfd/rsmu_core.c- Extension
.c- Size
- 1710 bytes
- Lines
- 91
- Domain
- Driver Families
- Bucket
- drivers/mfd
- Inferred role
- Driver Families: exported/initcall integration point
- Status
- integration 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.
- Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/init.hlinux/kernel.hlinux/mfd/core.hlinux/mfd/rsmu.hlinux/module.hlinux/of.hlinux/regmap.hlinux/slab.hrsmu.h
Detected Declarations
function rsmu_core_initfunction rsmu_core_exitexport rsmu_core_initexport rsmu_core_exit
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0+
/*
* Core driver for Renesas Synchronization Management Unit (SMU) devices.
*
* Copyright (C) 2021 Integrated Device Technology, Inc., a Renesas Company.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mfd/core.h>
#include <linux/mfd/rsmu.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include "rsmu.h"
enum {
RSMU_PHC = 0,
RSMU_CDEV = 1,
RSMU_N_DEVS = 2,
};
static struct mfd_cell rsmu_cm_devs[] = {
[RSMU_PHC] = {
.name = "8a3400x-phc",
},
[RSMU_CDEV] = {
.name = "8a3400x-cdev",
},
};
static struct mfd_cell rsmu_sabre_devs[] = {
[RSMU_PHC] = {
.name = "82p33x1x-phc",
},
[RSMU_CDEV] = {
.name = "82p33x1x-cdev",
},
};
static struct mfd_cell rsmu_sl_devs[] = {
[RSMU_PHC] = {
.name = "8v19n85x-phc",
},
[RSMU_CDEV] = {
.name = "8v19n85x-cdev",
},
};
int rsmu_core_init(struct rsmu_ddata *rsmu)
{
struct mfd_cell *cells;
int ret;
switch (rsmu->type) {
case RSMU_CM:
cells = rsmu_cm_devs;
break;
case RSMU_SABRE:
cells = rsmu_sabre_devs;
break;
case RSMU_SL:
cells = rsmu_sl_devs;
break;
default:
dev_err(rsmu->dev, "Unsupported RSMU device type: %d\n", rsmu->type);
return -ENODEV;
}
mutex_init(&rsmu->lock);
ret = devm_mfd_add_devices(rsmu->dev, PLATFORM_DEVID_AUTO, cells,
RSMU_N_DEVS, NULL, 0, NULL);
if (ret < 0)
dev_err(rsmu->dev, "Failed to register sub-devices: %d\n", ret);
return ret;
}
EXPORT_SYMBOL_GPL(rsmu_core_init);
void rsmu_core_exit(struct rsmu_ddata *rsmu)
{
mutex_destroy(&rsmu->lock);
}
EXPORT_SYMBOL_GPL(rsmu_core_exit);
MODULE_DESCRIPTION("Renesas SMU core driver");
MODULE_LICENSE("GPL");
Annotation
- Immediate include surface: `linux/init.h`, `linux/kernel.h`, `linux/mfd/core.h`, `linux/mfd/rsmu.h`, `linux/module.h`, `linux/of.h`, `linux/regmap.h`, `linux/slab.h`.
- Detected declarations: `function rsmu_core_init`, `function rsmu_core_exit`, `export rsmu_core_init`, `export rsmu_core_exit`.
- Atlas domain: Driver Families / drivers/mfd.
- Implementation status: integration 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.