diff options
| author | Greentime Hu <greentime@andestech.com> | 2017-10-25 14:46:21 +0800 |
|---|---|---|
| committer | Greentime Hu <greentime@andestech.com> | 2018-02-22 10:44:34 +0800 |
| commit | beebdeaa1d39125ef5a38818024e93b365621a3b (patch) | |
| tree | 06555b1ada087790b3ae25b7946e5ffa54b09b7e /arch/nds32 | |
| parent | e2f8b5c028f3eb81ed0507ed1a3b05ec6013ce56 (diff) | |
nds32: Device tree support
This patch adds support for device tree.
Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/nds32')
| -rw-r--r-- | arch/nds32/boot/dts/Makefile | 8 | ||||
| -rw-r--r-- | arch/nds32/boot/dts/ae3xx.dts | 85 | ||||
| -rw-r--r-- | arch/nds32/kernel/devtree.c | 19 |
3 files changed, 112 insertions, 0 deletions
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 <linux/bug.h> +#include <linux/printk.h> +#include <linux/of_fdt.h> + +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()); +} |