forked from Minki/linux
a362897562
Currently there is no user of DMC and CMU SFR offsets so we can safely remove mapping of their SFR address space and cleanup related offset macros from mach-exynos. Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
245 lines
6.2 KiB
C
245 lines
6.2 KiB
C
/*
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* SAMSUNG EXYNOS Flattened Device Tree enabled machine
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*
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* Copyright (c) 2010-2014 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_fdt.h>
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#include <linux/platform_device.h>
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#include <linux/irqchip.h>
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#include <linux/soc/samsung/exynos-regs-pmu.h>
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#include <asm/cacheflush.h>
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#include <asm/hardware/cache-l2x0.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <mach/map.h>
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#include <plat/cpu.h>
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#include "common.h"
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static struct map_desc exynos4_iodesc[] __initdata = {
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{
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.virtual = (unsigned long)S5P_VA_COREPERI_BASE,
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.pfn = __phys_to_pfn(EXYNOS4_PA_COREPERI),
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.length = SZ_8K,
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.type = MT_DEVICE,
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},
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};
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static struct platform_device exynos_cpuidle = {
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.name = "exynos_cpuidle",
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#ifdef CONFIG_ARM_EXYNOS_CPUIDLE
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.dev.platform_data = exynos_enter_aftr,
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#endif
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.id = -1,
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};
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void __iomem *sysram_base_addr;
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void __iomem *sysram_ns_base_addr;
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void __init exynos_sysram_init(void)
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{
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struct device_node *node;
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for_each_compatible_node(node, NULL, "samsung,exynos4210-sysram") {
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if (!of_device_is_available(node))
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continue;
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sysram_base_addr = of_iomap(node, 0);
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break;
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}
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for_each_compatible_node(node, NULL, "samsung,exynos4210-sysram-ns") {
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if (!of_device_is_available(node))
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continue;
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sysram_ns_base_addr = of_iomap(node, 0);
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break;
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}
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}
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static void __init exynos_init_late(void)
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{
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if (of_machine_is_compatible("samsung,exynos5440"))
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/* to be supported later */
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return;
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exynos_pm_init();
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}
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static int __init exynos_fdt_map_chipid(unsigned long node, const char *uname,
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int depth, void *data)
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{
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struct map_desc iodesc;
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const __be32 *reg;
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int len;
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if (!of_flat_dt_is_compatible(node, "samsung,exynos4210-chipid") &&
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!of_flat_dt_is_compatible(node, "samsung,exynos5440-clock"))
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return 0;
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reg = of_get_flat_dt_prop(node, "reg", &len);
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if (reg == NULL || len != (sizeof(unsigned long) * 2))
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return 0;
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iodesc.pfn = __phys_to_pfn(be32_to_cpu(reg[0]));
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iodesc.length = be32_to_cpu(reg[1]) - 1;
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iodesc.virtual = (unsigned long)S5P_VA_CHIPID;
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iodesc.type = MT_DEVICE;
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iotable_init(&iodesc, 1);
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return 1;
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}
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/*
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* exynos_map_io
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*
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* register the standard cpu IO areas
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*/
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static void __init exynos_map_io(void)
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{
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if (soc_is_exynos4())
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iotable_init(exynos4_iodesc, ARRAY_SIZE(exynos4_iodesc));
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}
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static void __init exynos_init_io(void)
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{
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debug_ll_io_init();
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of_scan_flat_dt(exynos_fdt_map_chipid, NULL);
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/* detect cpu id and rev. */
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s5p_init_cpu(S5P_VA_CHIPID);
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exynos_map_io();
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}
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/*
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* Set or clear the USE_DELAYED_RESET_ASSERTION option. Used by smp code
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* and suspend.
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*
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* This is necessary only on Exynos4 SoCs. When system is running
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* USE_DELAYED_RESET_ASSERTION should be set so the ARM CLK clock down
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* feature could properly detect global idle state when secondary CPU is
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* powered down.
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*
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* However this should not be set when such system is going into suspend.
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*/
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void exynos_set_delayed_reset_assertion(bool enable)
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{
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if (of_machine_is_compatible("samsung,exynos4")) {
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unsigned int tmp, core_id;
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for (core_id = 0; core_id < num_possible_cpus(); core_id++) {
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tmp = pmu_raw_readl(EXYNOS_ARM_CORE_OPTION(core_id));
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if (enable)
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tmp |= S5P_USE_DELAYED_RESET_ASSERTION;
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else
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tmp &= ~(S5P_USE_DELAYED_RESET_ASSERTION);
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pmu_raw_writel(tmp, EXYNOS_ARM_CORE_OPTION(core_id));
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}
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}
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}
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/*
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* Apparently, these SoCs are not able to wake-up from suspend using
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* the PMU. Too bad. Should they suddenly become capable of such a
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* feat, the matches below should be moved to suspend.c.
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*/
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static const struct of_device_id exynos_dt_pmu_match[] = {
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{ .compatible = "samsung,exynos5260-pmu" },
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{ .compatible = "samsung,exynos5410-pmu" },
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{ /*sentinel*/ },
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};
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static void exynos_map_pmu(void)
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{
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struct device_node *np;
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np = of_find_matching_node(NULL, exynos_dt_pmu_match);
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if (np)
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pmu_base_addr = of_iomap(np, 0);
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}
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static void __init exynos_init_irq(void)
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{
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irqchip_init();
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/*
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* Since platsmp.c needs pmu base address by the time
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* DT is not unflatten so we can't use DT APIs before
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* init_irq
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*/
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exynos_map_pmu();
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}
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static void __init exynos_dt_machine_init(void)
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{
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/*
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* This is called from smp_prepare_cpus if we've built for SMP, but
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* we still need to set it up for PM and firmware ops if not.
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*/
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if (!IS_ENABLED(CONFIG_SMP))
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exynos_sysram_init();
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#if defined(CONFIG_SMP) && defined(CONFIG_ARM_EXYNOS_CPUIDLE)
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if (of_machine_is_compatible("samsung,exynos4210") ||
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of_machine_is_compatible("samsung,exynos3250"))
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exynos_cpuidle.dev.platform_data = &cpuidle_coupled_exynos_data;
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#endif
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if (of_machine_is_compatible("samsung,exynos4210") ||
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of_machine_is_compatible("samsung,exynos4212") ||
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(of_machine_is_compatible("samsung,exynos4412") &&
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of_machine_is_compatible("samsung,trats2")) ||
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of_machine_is_compatible("samsung,exynos3250") ||
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of_machine_is_compatible("samsung,exynos5250"))
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platform_device_register(&exynos_cpuidle);
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}
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static char const *const exynos_dt_compat[] __initconst = {
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"samsung,exynos3",
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"samsung,exynos3250",
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"samsung,exynos4",
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"samsung,exynos4210",
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"samsung,exynos4212",
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"samsung,exynos4412",
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"samsung,exynos4415",
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"samsung,exynos5",
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"samsung,exynos5250",
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"samsung,exynos5260",
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"samsung,exynos5420",
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"samsung,exynos5440",
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NULL
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};
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static void __init exynos_dt_fixup(void)
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{
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/*
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* Some versions of uboot pass garbage entries in the memory node,
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* use the old CONFIG_ARM_NR_BANKS
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*/
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of_fdt_limit_memory(8);
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}
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DT_MACHINE_START(EXYNOS_DT, "SAMSUNG EXYNOS (Flattened Device Tree)")
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/* Maintainer: Thomas Abraham <thomas.abraham@linaro.org> */
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/* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
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.l2c_aux_val = 0x3c400001,
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.l2c_aux_mask = 0xc20fffff,
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.smp = smp_ops(exynos_smp_ops),
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.map_io = exynos_init_io,
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.init_early = exynos_firmware_init,
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.init_irq = exynos_init_irq,
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.init_machine = exynos_dt_machine_init,
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.init_late = exynos_init_late,
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.dt_compat = exynos_dt_compat,
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.dt_fixup = exynos_dt_fixup,
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MACHINE_END
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