1 /*
2  * Device Tree support for Rockchip SoCs
3  *
4  * Copyright (c) 2013 MundoReader S.L.
5  * Author: Heiko Stuebner <heiko@sntech.de>
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 
18 #include <linux/kernel.h>
19 #include <linux/init.h>
20 #include <linux/io.h>
21 #include <linux/of_platform.h>
22 #include <linux/irqchip.h>
23 #include <linux/clk-provider.h>
24 #include <linux/clocksource.h>
25 #include <linux/mfd/syscon.h>
26 #include <linux/regmap.h>
27 #include <asm/mach/arch.h>
28 #include <asm/mach/map.h>
29 #include <asm/hardware/cache-l2x0.h>
30 #include "core.h"
31 #include "pm.h"
32 
33 #define RK3288_TIMER6_7_PHYS 0xff810000
34 
35 static void __init rockchip_timer_init(void)
36 {
37 	if (of_machine_is_compatible("rockchip,rk3288")) {
38 		void __iomem *reg_base;
39 
40 		/*
41 		 * Most/all uboot versions for rk3288 don't enable timer7
42 		 * which is needed for the architected timer to work.
43 		 * So make sure it is running during early boot.
44 		 */
45 		reg_base = ioremap(RK3288_TIMER6_7_PHYS, SZ_16K);
46 		if (reg_base) {
47 			writel(0, reg_base + 0x30);
48 			writel(0xffffffff, reg_base + 0x20);
49 			writel(0xffffffff, reg_base + 0x24);
50 			writel(1, reg_base + 0x30);
51 			dsb();
52 			iounmap(reg_base);
53 		} else {
54 			pr_err("rockchip: could not map timer7 registers\n");
55 		}
56 	}
57 
58 	of_clk_init(NULL);
59 	timer_probe();
60 }
61 
62 static void __init rockchip_dt_init(void)
63 {
64 	rockchip_suspend_init();
65 }
66 
67 static const char * const rockchip_board_dt_compat[] = {
68 	"rockchip,rk2928",
69 	"rockchip,rk3066a",
70 	"rockchip,rk3066b",
71 	"rockchip,rk3188",
72 	"rockchip,rk3228",
73 	"rockchip,rk3288",
74 	"rockchip,rv1108",
75 	NULL,
76 };
77 
78 DT_MACHINE_START(ROCKCHIP_DT, "Rockchip (Device Tree)")
79 	.l2c_aux_val	= 0,
80 	.l2c_aux_mask	= ~0,
81 	.init_time	= rockchip_timer_init,
82 	.dt_compat	= rockchip_board_dt_compat,
83 	.init_machine	= rockchip_dt_init,
84 MACHINE_END
85