543c5040f5
The definition
static const char *axxia_dt_match[] __initconst = {
...
defines a changable array of constant strings. That is you must not do:
*axxia_dt_match[0] = 'k';
but
axxia_dt_match[0] = "different string";
is fine. So the annotation __initconst is wrong and yields a compiler
error when other really const variables are added with __initconst.
As the struct machine_desc member dt_compat is declared as
const char *const *dt_compat;
making the arrays const is the better alternative over changing all
annotations to __initdata.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
287 lines
6.9 KiB
C
287 lines
6.9 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/kernel.h>
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#include <linux/serial_s3c.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/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/pm_domain.h>
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#include <linux/irqchip.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 <asm/memory.h>
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#include <mach/map.h>
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#include "common.h"
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#include "mfc.h"
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#include "regs-pmu.h"
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void __iomem *pmu_base_addr;
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static struct map_desc exynos4_iodesc[] __initdata = {
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{
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.virtual = (unsigned long)S5P_VA_SROMC,
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.pfn = __phys_to_pfn(EXYNOS4_PA_SROMC),
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.length = SZ_4K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S5P_VA_CMU,
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.pfn = __phys_to_pfn(EXYNOS4_PA_CMU),
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.length = SZ_128K,
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.type = MT_DEVICE,
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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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.virtual = (unsigned long)S5P_VA_DMC0,
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.pfn = __phys_to_pfn(EXYNOS4_PA_DMC0),
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.length = SZ_64K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S5P_VA_DMC1,
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.pfn = __phys_to_pfn(EXYNOS4_PA_DMC1),
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.length = SZ_64K,
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.type = MT_DEVICE,
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},
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};
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static struct map_desc exynos5_iodesc[] __initdata = {
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{
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.virtual = (unsigned long)S5P_VA_SROMC,
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.pfn = __phys_to_pfn(EXYNOS5_PA_SROMC),
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.length = SZ_4K,
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.type = MT_DEVICE,
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}, {
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.virtual = (unsigned long)S5P_VA_CMU,
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.pfn = __phys_to_pfn(EXYNOS5_PA_CMU),
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.length = 144 * SZ_1K,
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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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if (soc_is_exynos5())
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iotable_init(exynos5_iodesc, ARRAY_SIZE(exynos5_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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static const struct of_device_id exynos_dt_pmu_match[] = {
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{ .compatible = "samsung,exynos3250-pmu" },
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{ .compatible = "samsung,exynos4210-pmu" },
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{ .compatible = "samsung,exynos4212-pmu" },
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{ .compatible = "samsung,exynos4412-pmu" },
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{ .compatible = "samsung,exynos4415-pmu" },
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{ .compatible = "samsung,exynos5250-pmu" },
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{ .compatible = "samsung,exynos5260-pmu" },
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{ .compatible = "samsung,exynos5410-pmu" },
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{ .compatible = "samsung,exynos5420-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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if (!pmu_base_addr)
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panic("failed to find exynos pmu register\n");
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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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#ifdef CONFIG_ARM_EXYNOS_CPUIDLE
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if (of_machine_is_compatible("samsung,exynos4210"))
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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,exynos5250"))
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platform_device_register(&exynos_cpuidle);
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platform_device_register_simple("exynos-cpufreq", -1, NULL, 0);
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of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
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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_reserve(void)
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{
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#ifdef CONFIG_S5P_DEV_MFC
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int i;
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char *mfc_mem[] = {
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"samsung,mfc-v5",
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"samsung,mfc-v6",
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"samsung,mfc-v7",
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"samsung,mfc-v8",
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};
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for (i = 0; i < ARRAY_SIZE(mfc_mem); i++)
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if (of_scan_flat_dt(s5p_fdt_alloc_mfc_mem, mfc_mem[i]))
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break;
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#endif
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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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.reserve = exynos_reserve,
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.dt_fixup = exynos_dt_fixup,
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MACHINE_END
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