| /* |
| * Author: Alexander Shiyan <shc_work@mail.ru>, 2016 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| */ |
| |
| #include <linux/io.h> |
| #include <linux/of_fdt.h> |
| #include <linux/platform_device.h> |
| #include <linux/random.h> |
| #include <linux/sizes.h> |
| |
| #include <linux/mfd/syscon/clps711x.h> |
| |
| #include <asm/system_info.h> |
| #include <asm/system_misc.h> |
| #include <asm/mach/arch.h> |
| #include <asm/mach/map.h> |
| |
| #define CLPS711X_VIRT_BASE IOMEM(0xfeff4000) |
| #define CLPS711X_PHYS_BASE (0x80000000) |
| # define SYSFLG1 (0x0140) |
| # define HALT (0x0800) |
| # define UNIQID (0x2440) |
| # define RANDID0 (0x2700) |
| # define RANDID1 (0x2704) |
| # define RANDID2 (0x2708) |
| # define RANDID3 (0x270c) |
| |
| static struct map_desc clps711x_io_desc __initdata = { |
| .virtual = (unsigned long)CLPS711X_VIRT_BASE, |
| .pfn = __phys_to_pfn(CLPS711X_PHYS_BASE), |
| .length = 48 * SZ_1K, |
| .type = MT_DEVICE, |
| }; |
| |
| static void __init clps711x_map_io(void) |
| { |
| iotable_init(&clps711x_io_desc, 1); |
| } |
| |
| static const struct resource clps711x_cpuidle_res = |
| DEFINE_RES_MEM(CLPS711X_PHYS_BASE + HALT, SZ_128); |
| |
| static void __init clps711x_init(void) |
| { |
| u32 id[5]; |
| |
| id[0] = readl(CLPS711X_VIRT_BASE + UNIQID); |
| id[1] = readl(CLPS711X_VIRT_BASE + RANDID0); |
| id[2] = readl(CLPS711X_VIRT_BASE + RANDID1); |
| id[3] = readl(CLPS711X_VIRT_BASE + RANDID2); |
| id[4] = readl(CLPS711X_VIRT_BASE + RANDID3); |
| system_rev = SYSFLG1_VERID(readl(CLPS711X_VIRT_BASE + SYSFLG1)); |
| |
| add_device_randomness(id, sizeof(id)); |
| |
| system_serial_low = id[0]; |
| |
| platform_device_register_simple("clps711x-cpuidle", PLATFORM_DEVID_NONE, |
| &clps711x_cpuidle_res, 1); |
| } |
| |
| static void clps711x_restart(enum reboot_mode mode, const char *cmd) |
| { |
| soft_restart(0); |
| } |
| |
| static const char *const clps711x_compat[] __initconst = { |
| "cirrus,ep7209", |
| NULL |
| }; |
| |
| DT_MACHINE_START(CLPS711X_DT, "Cirrus Logic CLPS711X (Device Tree Support)") |
| .dt_compat = clps711x_compat, |
| .map_io = clps711x_map_io, |
| .init_late = clps711x_init, |
| .restart = clps711x_restart, |
| MACHINE_END |
