// 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 <linux/errno.h> #include "mgb4_regs.h" int mgb4_regs_map(struct resource *res, struct mgb4_regs *regs) { regs->mapbase = res->start; regs->mapsize = resource_size(res); 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); }