1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Device Tree support for Rockchip SoCs |
4 | * |
5 | * Copyright (c) 2013 MundoReader S.L. |
6 | * Author: Heiko Stuebner <heiko@sntech.de> |
7 | */ |
8 | |
9 | #include <linux/kernel.h> |
10 | #include <linux/init.h> |
11 | #include <linux/io.h> |
12 | #include <linux/of.h> |
13 | #include <linux/of_clk.h> |
14 | #include <linux/clocksource.h> |
15 | #include <asm/mach/arch.h> |
16 | #include <asm/mach/map.h> |
17 | #include "core.h" |
18 | #include "pm.h" |
19 | |
20 | #define RK3288_TIMER6_7_PHYS 0xff810000 |
21 | |
22 | static void __init rockchip_timer_init(void) |
23 | { |
24 | if (of_machine_is_compatible(compat: "rockchip,rk3288" )) { |
25 | void __iomem *reg_base; |
26 | |
27 | /* |
28 | * Most/all uboot versions for rk3288 don't enable timer7 |
29 | * which is needed for the architected timer to work. |
30 | * So make sure it is running during early boot. |
31 | */ |
32 | reg_base = ioremap(RK3288_TIMER6_7_PHYS, size: SZ_16K); |
33 | if (reg_base) { |
34 | writel(val: 0, addr: reg_base + 0x30); |
35 | writel(val: 0xffffffff, addr: reg_base + 0x20); |
36 | writel(val: 0xffffffff, addr: reg_base + 0x24); |
37 | writel(val: 1, addr: reg_base + 0x30); |
38 | dsb(); |
39 | iounmap(addr: reg_base); |
40 | } else { |
41 | pr_err("rockchip: could not map timer7 registers\n" ); |
42 | } |
43 | } |
44 | |
45 | of_clk_init(NULL); |
46 | timer_probe(); |
47 | } |
48 | |
49 | static void __init rockchip_dt_init(void) |
50 | { |
51 | rockchip_suspend_init(); |
52 | } |
53 | |
54 | static const char * const rockchip_board_dt_compat[] = { |
55 | "rockchip,rk2928" , |
56 | "rockchip,rk3066a" , |
57 | "rockchip,rk3066b" , |
58 | "rockchip,rk3188" , |
59 | "rockchip,rk3228" , |
60 | "rockchip,rk3288" , |
61 | "rockchip,rv1108" , |
62 | NULL, |
63 | }; |
64 | |
65 | DT_MACHINE_START(ROCKCHIP_DT, "Rockchip (Device Tree)" ) |
66 | .l2c_aux_val = 0, |
67 | .l2c_aux_mask = ~0, |
68 | .init_time = rockchip_timer_init, |
69 | .dt_compat = rockchip_board_dt_compat, |
70 | .init_machine = rockchip_dt_init, |
71 | MACHINE_END |
72 | |