summaryrefslogtreecommitdiffstats
path: root/arch/mips/ralink/of.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/ralink/of.c')
-rw-r--r--arch/mips/ralink/of.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/arch/mips/ralink/of.c b/arch/mips/ralink/of.c
new file mode 100644
index 000000000..4d06de77d
--- /dev/null
+++ b/arch/mips/ralink/of.c
@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2013 John Crispin <john@phrozen.org>
+ */
+
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/export.h>
+#include <linux/init.h>
+#include <linux/sizes.h>
+#include <linux/of_fdt.h>
+#include <linux/kernel.h>
+#include <linux/memblock.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+
+#include <asm/reboot.h>
+#include <asm/bootinfo.h>
+#include <asm/addrspace.h>
+#include <asm/prom.h>
+#include <asm/mach-ralink/ralink_regs.h>
+
+#include "common.h"
+
+__iomem void *rt_sysc_membase;
+__iomem void *rt_memc_membase;
+EXPORT_SYMBOL_GPL(rt_sysc_membase);
+
+__iomem void *plat_of_remap_node(const char *node)
+{
+ struct resource res;
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, node);
+ if (!np)
+ panic("Failed to find %s node", node);
+
+ if (of_address_to_resource(np, 0, &res))
+ panic("Failed to get resource for %s", node);
+
+ of_node_put(np);
+
+ if (!request_mem_region(res.start,
+ resource_size(&res),
+ res.name))
+ panic("Failed to request resources for %s", node);
+
+ return ioremap(res.start, resource_size(&res));
+}
+
+void __init plat_mem_setup(void)
+{
+ void *dtb;
+
+ set_io_port_base(KSEG1);
+
+ /*
+ * Load the builtin devicetree. This causes the chosen node to be
+ * parsed resulting in our memory appearing.
+ */
+ dtb = get_fdt();
+ __dt_setup_arch(dtb);
+
+ if (early_init_dt_scan_memory())
+ return;
+
+ if (soc_info.mem_detect)
+ soc_info.mem_detect();
+ else if (soc_info.mem_size)
+ memblock_add(soc_info.mem_base, soc_info.mem_size * SZ_1M);
+ else
+ detect_memory_region(soc_info.mem_base,
+ soc_info.mem_size_min * SZ_1M,
+ soc_info.mem_size_max * SZ_1M);
+}
+
+static int __init plat_of_setup(void)
+{
+ __dt_register_buses(soc_info.compatible, "palmbus");
+
+ /* make sure that the reset controller is setup early */
+ if (ralink_soc != MT762X_SOC_MT7621AT)
+ ralink_rst_init();
+
+ return 0;
+}
+
+arch_initcall(plat_of_setup);