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