mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-11 12:28:41 +08:00
31 lines
720 B
C
31 lines
720 B
C
|
// SPDX-License-Identifier: GPL-2.0-only
|
||
|
|
/*
|
||
|
|
* Copyright (C) 2021-2022 Digiteq Automotive
|
||
|
|
* author: Martin Tuma <martin.tuma@digiteqautomotive.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/ioport.h>
|
||
|
|
#include "mgb4_regs.h"
|
||
|
|
|
||
|
|
int mgb4_regs_map(struct resource *res, struct mgb4_regs *regs)
|
||
|
|
{
|
||
|
|
regs->mapbase = res->start;
|
||
|
|
regs->mapsize = res->end - res->start;
|
||
|
|
|
||
|
|
if (!request_mem_region(regs->mapbase, regs->mapsize, res->name))
|
||
|
|
return -EINVAL;
|
||
|
|
regs->membase = ioremap(regs->mapbase, regs->mapsize);
|
||
|
|
if (!regs->membase) {
|
||
|
|
release_mem_region(regs->mapbase, regs->mapsize);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void mgb4_regs_free(struct mgb4_regs *regs)
|
||
|
|
{
|
||
|
|
iounmap(regs->membase);
|
||
|
|
release_mem_region(regs->mapbase, regs->mapsize);
|
||
|
|
}
|