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1 | /* |
2 | * Device Tree support for Mediatek SoCs | |
3 | * | |
4 | * Copyright (c) 2014 MundoReader S.L. | |
5 | * Author: Matthias Brugger <matthias.bgg@gmail.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | */ | |
17 | #include <linux/init.h> | |
18 | #include <asm/mach/arch.h> | |
9821e545 MB |
19 | #include <linux/of.h> |
20 | #include <linux/clk-provider.h> | |
21 | #include <linux/clocksource.h> | |
22 | ||
23 | ||
24 | #define GPT6_CON_MT65xx 0x10008060 | |
25 | #define GPT_ENABLE 0x31 | |
26 | ||
27 | static void __init mediatek_timer_init(void) | |
28 | { | |
29 | void __iomem *gpt_base; | |
30 | ||
31 | if (of_machine_is_compatible("mediatek,mt6589") || | |
601bac76 | 32 | of_machine_is_compatible("mediatek,mt7623") || |
9821e545 MB |
33 | of_machine_is_compatible("mediatek,mt8135") || |
34 | of_machine_is_compatible("mediatek,mt8127")) { | |
35 | /* turn on GPT6 which ungates arch timer clocks */ | |
36 | gpt_base = ioremap(GPT6_CON_MT65xx, 0x04); | |
37 | ||
38 | /* enable clock and set to free-run */ | |
39 | writel(GPT_ENABLE, gpt_base); | |
40 | iounmap(gpt_base); | |
41 | } | |
42 | ||
43 | of_clk_init(NULL); | |
56e04649 | 44 | clocksource_probe(); |
9821e545 | 45 | }; |
f682a218 MB |
46 | |
47 | static const char * const mediatek_board_dt_compat[] = { | |
74d25721 | 48 | "mediatek,mt2701", |
f682a218 | 49 | "mediatek,mt6589", |
4542172e | 50 | "mediatek,mt6592", |
31ac0d69 | 51 | "mediatek,mt7623", |
1ccd653c | 52 | "mediatek,mt8127", |
0c3fb203 | 53 | "mediatek,mt8135", |
f682a218 MB |
54 | NULL, |
55 | }; | |
56 | ||
57 | DT_MACHINE_START(MEDIATEK_DT, "Mediatek Cortex-A7 (Device Tree)") | |
58 | .dt_compat = mediatek_board_dt_compat, | |
9821e545 | 59 | .init_time = mediatek_timer_init, |
f682a218 | 60 | MACHINE_END |