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Date: Fri, 22 May 2015 16:51:02 +0100
From: Paul Burton <paul.burton@...tec.com>
To: <linux-mips@...ux-mips.org>
CC: <devicetree@...r.kernel.org>, Rob Herring <robh+dt@...nel.org>,
Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
"Paul Burton" <paul.burton@...tec.com>,
Andrew Bresticker <abrestic@...omium.org>,
<linux-kernel@...r.kernel.org>,
Markos Chandras <markos.chandras@...tec.com>,
Ralf Baechle <ralf@...ux-mips.org>
Subject: [PATCH 03/15] 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.
Signed-off-by: Paul Burton <paul.burton@...tec.com>
---
arch/mips/Kconfig | 2 ++
arch/mips/boot/dts/mti/Makefile | 1 +
arch/mips/boot/dts/mti/malta.dts | 7 +++++++
arch/mips/mti-malta/Makefile | 2 +-
arch/mips/mti-malta/malta-dt.c | 34 ++++++++++++++++++++++++++++++++++
arch/mips/mti-malta/malta-setup.c | 4 ++++
6 files changed, 49 insertions(+), 1 deletion(-)
create mode 100644 arch/mips/boot/dts/mti/malta.dts
create mode 100644 arch/mips/mti-malta/malta-dt.c
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index f501665..75dd13d 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -434,6 +434,8 @@ config MIPS_MALTA
select SYS_SUPPORTS_MULTITHREADING
select SYS_SUPPORTS_SMARTMIPS
select SYS_SUPPORTS_ZBOOT
+ select USE_OF
+ select BUILTIN_DTB
help
This enables support for the MIPS Technologies Malta evaluation
board.
diff --git a/arch/mips/boot/dts/mti/Makefile b/arch/mips/boot/dts/mti/Makefile
index ef1f3db..144d776 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 0000000..c678115
--- /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 6510ace..ea35587 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@...ux-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 0000000..47a2288
--- /dev/null
+++ b/arch/mips/mti-malta/malta-dt.c
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2015 Imagination Technologies
+ * Author: Paul Burton <paul.burton@...tec.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 db7c9e5..9d1e7f5 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");
--
2.4.1
--
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