| 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
|---|---|
| 2 | /* |
| 3 | * (c) Copyright 2006 Benjamin Herrenschmidt, IBM Corp. |
| 4 | * <benh@kernel.crashing.org> |
| 5 | */ |
| 6 | |
| 7 | #undef DEBUG |
| 8 | |
| 9 | #include <linux/kernel.h> |
| 10 | #include <linux/export.h> |
| 11 | #include <linux/of_address.h> |
| 12 | #include <asm/dcr.h> |
| 13 | |
| 14 | unsigned int dcr_resource_start(const struct device_node *np, |
| 15 | unsigned int index) |
| 16 | { |
| 17 | unsigned int ds; |
| 18 | const u32 *dr = of_get_property(node: np, name: "dcr-reg", lenp: &ds); |
| 19 | |
| 20 | if (dr == NULL || ds & 1 || index >= (ds / 8)) |
| 21 | return 0; |
| 22 | |
| 23 | return dr[index * 2]; |
| 24 | } |
| 25 | EXPORT_SYMBOL_GPL(dcr_resource_start); |
| 26 | |
| 27 | unsigned int dcr_resource_len(const struct device_node *np, unsigned int index) |
| 28 | { |
| 29 | unsigned int ds; |
| 30 | const u32 *dr = of_get_property(node: np, name: "dcr-reg", lenp: &ds); |
| 31 | |
| 32 | if (dr == NULL || ds & 1 || index >= (ds / 8)) |
| 33 | return 0; |
| 34 | |
| 35 | return dr[index * 2 + 1]; |
| 36 | } |
| 37 | EXPORT_SYMBOL_GPL(dcr_resource_len); |
| 38 | |
| 39 | DEFINE_SPINLOCK(dcr_ind_lock); |
| 40 | EXPORT_SYMBOL_GPL(dcr_ind_lock); |
| 41 |