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authorPaul Burton <paul.burton@imgtec.com>2015-05-22 16:51:02 +0100
committerRalf Baechle <ralf@linux-mips.org>2015-06-21 21:54:29 +0200
commite8823d26b4f18faeecf8f46adaecc52a7154c41f (patch)
treebd371a764309fb9b197fb52e81f425f3cdae09cf /arch
parent56d4c99b848ce3a07cf3643e1f2dc78419f0f954 (diff)
MIPS: Malta: Basic DT plumbing
Build a DT for the Malta platform into the kernel, load it & probe devices from it. The DT is essentially empty at this point, devices will be added in further patches. [ralf@linux-mips.org: Fixed conflicts.] Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Cc: Rob Herring <robh+dt@kernel.org> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Ian Campbell <ijc+devicetree@hellion.org.uk> Cc: Kumar Gala <galak@codeaurora.org> Cc: Andrew Bresticker <abrestic@chromium.org> Cc: linux-kernel@vger.kernel.org Cc: Markos Chandras <markos.chandras@imgtec.com> Patchwork: http://patchwork.linux-mips.org/patch/10119/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/mips/Kconfig2
-rw-r--r--arch/mips/boot/dts/mti/Makefile1
-rw-r--r--arch/mips/boot/dts/mti/malta.dts7
-rw-r--r--arch/mips/mti-malta/Makefile2
-rw-r--r--arch/mips/mti-malta/malta-dt.c34
-rw-r--r--arch/mips/mti-malta/malta-setup.c4
6 files changed, 49 insertions, 1 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 5e8ba716e441..d53b43237f7f 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -404,6 +404,7 @@ config MIPS_MALTA
select ARCH_MAY_HAVE_PC_FDC
select BOOT_ELF32
select BOOT_RAW
+ select BUILTIN_DTB
select CEVT_R4K
select CSRC_R4K
select CLKSRC_MIPS_GIC
@@ -443,6 +444,7 @@ config MIPS_MALTA
select SYS_SUPPORTS_MULTITHREADING
select SYS_SUPPORTS_SMARTMIPS
select SYS_SUPPORTS_ZBOOT
+ select USE_OF
select ZONE_DMA32 if 64BIT
help
This enables support for the MIPS Technologies Malta evaluation
diff --git a/arch/mips/boot/dts/mti/Makefile b/arch/mips/boot/dts/mti/Makefile
index ef1f3dbed033..144d776cc9f2 100644
--- a/arch/mips/boot/dts/mti/Makefile
+++ b/arch/mips/boot/dts/mti/Makefile
@@ -1,3 +1,4 @@
+dtb-$(CONFIG_MIPS_MALTA) += malta.dtb
dtb-$(CONFIG_MIPS_SEAD3) += sead3.dtb
obj-y += $(patsubst %.dtb, %.dtb.o, $(dtb-y))
diff --git a/arch/mips/boot/dts/mti/malta.dts b/arch/mips/boot/dts/mti/malta.dts
new file mode 100644
index 000000000000..c678115f5b7f
--- /dev/null
+++ b/arch/mips/boot/dts/mti/malta.dts
@@ -0,0 +1,7 @@
+/dts-v1/;
+
+/ {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "mti,malta";
+};
diff --git a/arch/mips/mti-malta/Makefile b/arch/mips/mti-malta/Makefile
index 6510ace272d4..ea35587a5c29 100644
--- a/arch/mips/mti-malta/Makefile
+++ b/arch/mips/mti-malta/Makefile
@@ -5,7 +5,7 @@
# Copyright (C) 2008 Wind River Systems, Inc.
# written by Ralf Baechle <ralf@linux-mips.org>
#
-obj-y := malta-display.o malta-init.o \
+obj-y := malta-display.o malta-dt.o malta-init.o \
malta-int.o malta-memory.o malta-platform.o \
malta-reset.o malta-setup.o malta-time.o
diff --git a/arch/mips/mti-malta/malta-dt.c b/arch/mips/mti-malta/malta-dt.c
new file mode 100644
index 000000000000..47a22889285f
--- /dev/null
+++ b/arch/mips/mti-malta/malta-dt.c
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2015 Imagination Technologies
+ * Author: Paul Burton <paul.burton@imgtec.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/init.h>
+#include <linux/of_fdt.h>
+#include <linux/of_platform.h>
+
+void __init device_tree_init(void)
+{
+ unflatten_and_copy_device_tree();
+}
+
+static const struct of_device_id bus_ids[] __initconst = {
+ { .compatible = "simple-bus", },
+ { .compatible = "isa", },
+ {},
+};
+
+static int __init publish_devices(void)
+{
+ if (!of_have_populated_dt())
+ return 0;
+
+ return of_platform_bus_probe(NULL, bus_ids, NULL);
+}
+device_initcall(publish_devices);
diff --git a/arch/mips/mti-malta/malta-setup.c b/arch/mips/mti-malta/malta-setup.c
index db7c9e5826a6..9d1e7f5ec36c 100644
--- a/arch/mips/mti-malta/malta-setup.c
+++ b/arch/mips/mti-malta/malta-setup.c
@@ -21,6 +21,7 @@
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/irq.h>
+#include <linux/of_fdt.h>
#include <linux/pci.h>
#include <linux/screen_info.h>
#include <linux/time.h>
@@ -31,6 +32,7 @@
#include <asm/mips-boards/malta.h>
#include <asm/mips-boards/maltaint.h>
#include <asm/dma.h>
+#include <asm/prom.h>
#include <asm/traps.h>
#ifdef CONFIG_VT
#include <linux/console.h>
@@ -249,6 +251,8 @@ void __init plat_mem_setup(void)
{
unsigned int i;
+ __dt_setup_arch(__dtb_start);
+
if (config_enabled(CONFIG_EVA))
/* EVA has already been configured in mach-malta/kernel-init.h */
pr_info("Enhanced Virtual Addressing (EVA) activated\n");