From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greentime Hu Subject: [PATCH v7 27/37] nds32: Device tree support Date: Tue, 13 Feb 2018 17:09:31 +0800 Message-ID: References: Return-path: In-Reply-To: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org To: greentime@andestech.com, linux-kernel@vger.kernel.org, arnd@arndb.de, linux-arch@vger.kernel.org, tglx@linutronix.de, jason@lakedaemon.net, marc.zyngier@arm.com, robh+dt@kernel.org, netdev@vger.kernel.org, deanbo422@gmail.com, devicetree@vger.kernel.org, viro@zeniv.linux.org.uk, dhowells@redhat.com, will.deacon@arm.com, daniel.lezcano@linaro.org, linux-serial@vger.kernel.org, geert.uytterhoeven@gmail.com, linus.walleij@linaro.org, mark.rutland@arm.com, greg@kroah.com, ren_guo@c-sky.com, rdunlap@infradead.org, davem@davemloft.net, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com Cc: green.hu@gmail.com, Vincent Chen List-Id: devicetree@vger.kernel.org This patch adds support for device tree. Signed-off-by: Vincent Chen Signed-off-by: Greentime Hu Acked-by: Arnd Bergmann --- arch/nds32/boot/dts/Makefile | 8 ++++ arch/nds32/boot/dts/ae3xx.dts | 85 +++++++++++++++++++++++++++++++++++++++++++ arch/nds32/kernel/devtree.c | 19 ++++++++++ 3 files changed, 112 insertions(+) create mode 100644 arch/nds32/boot/dts/Makefile create mode 100644 arch/nds32/boot/dts/ae3xx.dts create mode 100644 arch/nds32/kernel/devtree.c diff --git a/arch/nds32/boot/dts/Makefile b/arch/nds32/boot/dts/Makefile new file mode 100644 index 000000000000..d31faa8a1d50 --- /dev/null +++ b/arch/nds32/boot/dts/Makefile @@ -0,0 +1,8 @@ +ifneq '$(CONFIG_NDS32_BUILTIN_DTB)' '""' +BUILTIN_DTB := $(patsubst "%",%,$(CONFIG_NDS32_BUILTIN_DTB)).dtb.o +else +BUILTIN_DTB := +endif +obj-$(CONFIG_OF) += $(BUILTIN_DTB) + +clean-files := *.dtb *.dtb.S diff --git a/arch/nds32/boot/dts/ae3xx.dts b/arch/nds32/boot/dts/ae3xx.dts new file mode 100644 index 000000000000..bb39749a6673 --- /dev/null +++ b/arch/nds32/boot/dts/ae3xx.dts @@ -0,0 +1,85 @@ +/dts-v1/; +/ { + compatible = "andestech,ae3xx"; + #address-cells = <1>; + #size-cells = <1>; + interrupt-parent = <&intc>; + + chosen { + stdout-path = &serial0; + }; + + memory@0 { + device_type = "memory"; + reg = <0x00000000 0x40000000>; + }; + + cpus { + #address-cells = <1>; + #size-cells = <0>; + cpu@0 { + device_type = "cpu"; + compatible = "andestech,n13", "andestech,nds32v3"; + reg = <0>; + clock-frequency = <60000000>; + next-level-cache = <&L2>; + }; + }; + + intc: interrupt-controller { + compatible = "andestech,ativic32"; + #interrupt-cells = <1>; + interrupt-controller; + }; + + clock: clk { + #clock-cells = <0>; + compatible = "fixed-clock"; + clock-frequency = <30000000>; + }; + + apb { + compatible = "simple-bus"; + #address-cells = <1>; + #size-cells = <1>; + ranges; + + serial0: serial@f0300000 { + compatible = "andestech,uart16550", "ns16550a"; + reg = <0xf0300000 0x1000>; + interrupts = <8>; + clock-frequency = <14745600>; + reg-shift = <2>; + reg-offset = <32>; + no-loopback-test = <1>; + }; + + timer0: timer@f0400000 { + compatible = "andestech,atcpit100"; + reg = <0xf0400000 0x1000>; + interrupts = <2>; + clocks = <&clock>; + clock-names = "PCLK"; + }; + }; + + ahb { + compatible = "simple-bus"; + #address-cells = <1>; + #size-cells = <1>; + ranges; + + L2: cache-controller@e0500000 { + compatible = "andestech,atl2c"; + reg = <0xe0500000 0x1000>; + cache-unified; + cache-level = <2>; + }; + + mac0: ethernet@e0100000 { + compatible = "andestech,atmac100"; + reg = <0xe0100000 0x1000>; + interrupts = <18>; + }; + }; +}; diff --git a/arch/nds32/kernel/devtree.c b/arch/nds32/kernel/devtree.c new file mode 100644 index 000000000000..bdce0fe5af9f --- /dev/null +++ b/arch/nds32/kernel/devtree.c @@ -0,0 +1,19 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include +#include +#include + +void __init early_init_devtree(void *params) +{ + if (!params || !early_init_dt_scan(params)) { + pr_crit("\n" + "Error: invalid device tree blob at (virtual address 0x%p)\n" + "\nPlease check your bootloader.", params); + + BUG_ON(1); + } + + dump_stack_set_arch_desc("%s (DT)", of_flat_dt_get_machine_name()); +} -- 2.16.1