diff options
Diffstat (limited to 'arch/arm/mach-hisi/hisilicon.c')
| -rw-r--r-- | arch/arm/mach-hisi/hisilicon.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/arch/arm/mach-hisi/hisilicon.c b/arch/arm/mach-hisi/hisilicon.c new file mode 100644 index 000000000000..741faf3e7100 --- /dev/null +++ b/arch/arm/mach-hisi/hisilicon.c @@ -0,0 +1,90 @@ +/* + * (Hisilicon's SoC based) flattened device tree enabled machine + * + * Copyright (c) 2012-2013 Hisilicon Ltd. + * Copyright (c) 2012-2013 Linaro Ltd. + * + * Author: Haojian Zhuang <haojian.zhuang@linaro.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include <linux/clk-provider.h> +#include <linux/clocksource.h> +#include <linux/irqchip.h> +#include <linux/of_address.h> +#include <linux/of_platform.h> + +#include <asm/proc-fns.h> + +#include <asm/mach/arch.h> +#include <asm/mach/map.h> + +#include "core.h" + +#define HI3620_SYSCTRL_PHYS_BASE 0xfc802000 +#define HI3620_SYSCTRL_VIRT_BASE 0xfe802000 + +/* + * This table is only for optimization. Since ioremap() could always share + * the same mapping if it's defined as static IO mapping. + * + * Without this table, system could also work. The cost is some virtual address + * spaces wasted since ioremap() may be called multi times for the same + * IO space. + */ +static struct map_desc hi3620_io_desc[] __initdata = { + { + /* sysctrl */ + .pfn = __phys_to_pfn(HI3620_SYSCTRL_PHYS_BASE), + .virtual = HI3620_SYSCTRL_VIRT_BASE, + .length = 0x1000, + .type = MT_DEVICE, + }, +}; + +static void __init hi3620_map_io(void) +{ + debug_ll_io_init(); + iotable_init(hi3620_io_desc, ARRAY_SIZE(hi3620_io_desc)); +} + +static void hi3xxx_restart(enum reboot_mode mode, const char *cmd) +{ + struct device_node *np; + void __iomem *base; + int offset; + + np = of_find_compatible_node(NULL, NULL, "hisilicon,sysctrl"); + if (!np) { + pr_err("failed to find hisilicon,sysctrl node\n"); + return; + } + base = of_iomap(np, 0); + if (!base) { + pr_err("failed to map address in hisilicon,sysctrl node\n"); + return; + } + if (of_property_read_u32(np, "reboot-offset", &offset) < 0) { + pr_err("failed to find reboot-offset property\n"); + return; + } + writel_relaxed(0xdeadbeef, base + offset); + + while (1) + cpu_do_idle(); +} + +static const char *hi3xxx_compat[] __initconst = { + "hisilicon,hi3620-hi4511", + NULL, +}; + +DT_MACHINE_START(HI3620, "Hisilicon Hi3620 (Flattened Device Tree)") + .map_io = hi3620_map_io, + .dt_compat = hi3xxx_compat, + .smp = smp_ops(hi3xxx_smp_ops), + .restart = hi3xxx_restart, +MACHINE_END |