LXR linux/arch/arm/mach-rockchip/rockchip.c

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