This initial port adds support of ARC HS Development Kit board with some
basic features such serial port, USB, SD/MMC and Ethernet.
Essentially we run Linux kernel on all 4 cores (i.e. utilize SMP) and
heavily use IO Coherency for speeding-up DMA-aware peripherals.
Note as opposed to other ARC boards we link Linux kernel to
0x9000_ intentionally because cores 1 and 3 configured with DCCM
situated at our more usual link base 0x8000_.
Signed-off-by: Eugeniy Paltsev
Signed-off-by: Alexey Brodkin
Cc: Vineet Gupta
Cc: Rob Herring
---
Changes v3 -> v4:
* Removed senseless "ranges" property from "memory" node in .dts
* Refined early-boot code:
- CREG_PAE should be set only once thus master does that in init_early()
- ICCM relocation should be done on each and every core that sports ICCM
so we leave it in init_per_cpu(). Even though init_per_cpu() gets called
on the master core pretty late still it is way much earlier than that
moment when it might affect us - as it only huts us when addresses in
0x7z-0x7fff_ range are used, i.e. virtual addresses that we don't
use during init. This also makes code much cleaner compared to
additional check in case of master etc.
Changes v2 -> v3:
* Added Rob to Cc-list for DT binding approval
* Removed mention of prerequsite patch from commit message
* Removed hsdk_early_init() as hsdk_init_per_cpu() is executed on
all cores anyways including master
* Cleaned-up board's .dts a little bit
* Removed CONFIG_DP83867_PHY from defconfig as it was only used on
FPGA prototype, on real board we use MICREL PHY which is still selected
Changes v1 -> v2:
* Update copyright year from 2016 to more up to date 2017
* Merge early UART clock with AXS10x as in both cases that's 33.3 MHz
* Bump memory to 1Gb, we don't use more for now because it requires
trickier IOC setup and usage
* Update early platform init code:
- Added missing fixup_pae_regs() to per-cpu init
- Mark most of functions as "static __init"
- Use writel_relaxed() for setting CREG_PAE, CREG_PAE_UPDATE is still
written with stronger writel() since we don't want reordering to happen,
otherwise value written to CREG_PAE won't be applied
Documentation/devicetree/bindings/arc/hsdk.txt | 7 ++
arch/arc/Kconfig | 1 +
arch/arc/Makefile | 1 +
arch/arc/boot/dts/hsdk.dts | 150 +
arch/arc/configs/hsdk_defconfig| 71
arch/arc/kernel/devtree.c | 5 +-
arch/arc/plat-hsdk/Kconfig | 12 ++
arch/arc/plat-hsdk/Makefile| 9 ++
arch/arc/plat-hsdk/platform.c | 64 +++
9 files changed, 318 insertions(+), 2 deletions(-)
create mode 100644 Documentation/devicetree/bindings/arc/hsdk.txt
create mode 100644 arch/arc/boot/dts/hsdk.dts
create mode 100644 arch/arc/configs/hsdk_defconfig
create mode 100644 arch/arc/plat-hsdk/Kconfig
create mode 100644 arch/arc/plat-hsdk/Makefile
create mode 100644 arch/arc/plat-hsdk/platform.c
diff --git a/Documentation/devicetree/bindings/arc/hsdk.txt
b/Documentation/devicetree/bindings/arc/hsdk.txt
new file mode 100644
index ..be50654bbf61
--- /dev/null
+++ b/Documentation/devicetree/bindings/arc/hsdk.txt
@@ -0,0 +1,7 @@
+Synopsys DesignWare ARC HS Development Kit Device Tree Bindings
+---
+
+ARC HSDK Board with quad-core ARC HS38x4 in silicon.
+
+Required root node properties:
+- compatible = "snps,hsdk";
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index a5459698f0ee..92c912819613 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -101,6 +101,7 @@ source "arch/arc/plat-tb10x/Kconfig"
source "arch/arc/plat-axs10x/Kconfig"
#New platform adds here
source "arch/arc/plat-eznps/Kconfig"
+source "arch/arc/plat-hsdk/Kconfig"
endmenu
diff --git a/arch/arc/Makefile b/arch/arc/Makefile
index 44ef35d33956..55ca925edf65 100644
--- a/arch/arc/Makefile
+++ b/arch/arc/Makefile
@@ -111,6 +111,7 @@ core-$(CONFIG_ARC_PLAT_SIM) += arch/arc/plat-sim/
core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/
core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/
core-$(CONFIG_ARC_PLAT_EZNPS) += arch/arc/plat-eznps/
+core-$(CONFIG_ARC_PLAT_HSDK) += arch/arc/plat-hsdk/
ifdef CONFIG_ARC_PLAT_EZNPS
KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include
diff --git a/arch/arc/boot/dts/hsdk.dts b/arch/arc/boot/dts/hsdk.dts
new file mode 100644
index ..fb1a32f6673d
--- /dev/null
+++ b/arch/arc/boot/dts/hsdk.dts
@@ -0,0 +1,150 @@
+/*
+ * Copyright (C) 2017 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
