| /* |
| * Keystone2 based boards and SOC related code. |
| * |
| * Copyright 2013 Texas Instruments, Inc. |
| * Cyril Chemparathy <cyril@ti.com> |
| * Santosh Shilimkar <santosh.shillimkar@ti.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| */ |
| #include <linux/io.h> |
| #include <linux/of.h> |
| #include <linux/init.h> |
| #include <linux/of_platform.h> |
| #include <linux/of_address.h> |
| |
| #include <asm/setup.h> |
| #include <asm/mach/map.h> |
| #include <asm/mach/arch.h> |
| #include <asm/mach/time.h> |
| #include <asm/smp_plat.h> |
| |
| #include "keystone.h" |
| |
| #define PLL_RESET_WRITE_KEY_MASK 0xffff0000 |
| #define PLL_RESET_WRITE_KEY 0x5a69 |
| #define PLL_RESET BIT(16) |
| |
| static void __iomem *keystone_rstctrl; |
| |
| static void __init keystone_init(void) |
| { |
| struct device_node *node; |
| |
| node = of_find_compatible_node(NULL, NULL, "ti,keystone-reset"); |
| if (WARN_ON(!node)) |
| pr_warn("ti,keystone-reset node undefined\n"); |
| |
| keystone_rstctrl = of_iomap(node, 0); |
| if (WARN_ON(!keystone_rstctrl)) |
| pr_warn("ti,keystone-reset iomap error\n"); |
| |
| keystone_pm_runtime_init(); |
| of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); |
| } |
| |
| static const char *keystone_match[] __initconst = { |
| "ti,keystone-evm", |
| "ti,k2hk-evm", |
| "ti,k2l-evm", |
| "ti,k2e-evm", |
| NULL, |
| }; |
| |
| void keystone_restart(enum reboot_mode mode, const char *cmd) |
| { |
| u32 val; |
| |
| BUG_ON(!keystone_rstctrl); |
| |
| /* Enable write access to RSTCTRL */ |
| val = readl(keystone_rstctrl); |
| val &= PLL_RESET_WRITE_KEY_MASK; |
| val |= PLL_RESET_WRITE_KEY; |
| writel(val, keystone_rstctrl); |
| |
| /* Reset the SOC */ |
| val = readl(keystone_rstctrl); |
| val &= ~PLL_RESET; |
| writel(val, keystone_rstctrl); |
| } |
| |
| DT_MACHINE_START(KEYSTONE, "Keystone") |
| #if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE) |
| .dma_zone_size = SZ_2G, |
| #endif |
| .smp = smp_ops(keystone_smp_ops), |
| .init_machine = keystone_init, |
| .dt_compat = keystone_match, |
| .restart = keystone_restart, |
| MACHINE_END |