projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| d3b8bdd5 SW |
1 | /* |
| 2 | * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved. | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or modify it | |
| 5 | * under the terms and conditions of the GNU General Public License, | |
| 6 | * version 2, as published by the Free Software Foundation. | |
| 7 | * | |
| 8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
| 11 | * more details. | |
| 12 | * | |
| 13 | * You should have received a copy of the GNU General Public License | |
| 14 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 15 | * | |
| 16 | */ | |
| 17 | ||
| 18 | #include <linux/kernel.h> | |
| 19 | #include <linux/io.h> | |
| 20 | #include <linux/of.h> | |
| 21 | ||
| 2be39c07 | 22 | #include "iomap.h" |
| d3b8bdd5 SW |
23 | |
| 24 | #define PMC_CTRL 0x0 | |
| 25 | #define PMC_CTRL_INTR_LOW (1 << 17) | |
| 26 | ||
| 27 | static inline u32 tegra_pmc_readl(u32 reg) | |
| 28 | { | |
| 29 | return readl(IO_ADDRESS(TEGRA_PMC_BASE + reg)); | |
| 30 | } | |
| 31 | ||
| 32 | static inline void tegra_pmc_writel(u32 val, u32 reg) | |
| 33 | { | |
| 34 | writel(val, IO_ADDRESS(TEGRA_PMC_BASE + reg)); | |
| 35 | } | |
| 36 | ||
| 37 | #ifdef CONFIG_OF | |
| 38 | static const struct of_device_id matches[] __initconst = { | |
| 39 | { .compatible = "nvidia,tegra20-pmc" }, | |
| 40 | { } | |
| 41 | }; | |
| 42 | #endif | |
| 43 | ||
| 44 | void __init tegra_pmc_init(void) | |
| 45 | { | |
| 46 | /* | |
| 47 | * For now, Harmony is the only board that uses the PMC, and it wants | |
| 48 | * the signal inverted. Seaboard would too if it used the PMC. | |
| 49 | * Hopefully by the time other boards want to use the PMC, everything | |
| 50 | * will be device-tree, or they also want it inverted. | |
| 51 | */ | |
| 52 | bool invert_interrupt = true; | |
| 53 | u32 val; | |
| 54 | ||
| 55 | #ifdef CONFIG_OF | |
| 56 | if (of_have_populated_dt()) { | |
| 57 | struct device_node *np; | |
| 58 | ||
| 59 | invert_interrupt = false; | |
| 60 | ||
| 61 | np = of_find_matching_node(NULL, matches); | |
| 62 | if (np) { | |
| 63 | if (of_find_property(np, "nvidia,invert-interrupt", | |
| 64 | NULL)) | |
| 65 | invert_interrupt = true; | |
| 66 | } | |
| 67 | } | |
| 68 | #endif | |
| 69 | ||
| 70 | val = tegra_pmc_readl(PMC_CTRL); | |
| 71 | if (invert_interrupt) | |
| 72 | val |= PMC_CTRL_INTR_LOW; | |
| 73 | else | |
| 74 | val &= ~PMC_CTRL_INTR_LOW; | |
| 75 | tegra_pmc_writel(val, PMC_CTRL); | |
| 76 | } |