// SPDX-License-Identifier: GPL-2.0-or-later /* * Author: Alexander Shiyan <shc_work@mail.ru>, 2016 */ #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