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("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, SZ_16K); 33 if (reg_base) { 34 writel(0, reg_base + 0x30); 35 writel(0xffffffff, reg_base + 0x20); 36 writel(0xffffffff, reg_base + 0x24); 37 writel(1, reg_base + 0x30); 38 dsb(); 39 iounmap(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