arm/dts: Add Aspeed ast2400 device tree

A common device tree for all forth gen/ast2400 systems and a board
specific dts for the Palmetto OpenPower developemnt machine which was
used for testing.

Signed-off-by: Joel Stanley <joel@jms.id.au>

3 files changed, 187 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 95c1923ce6fa..dee3a92cbd3c 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -839,6 +839,7 @@ dtb-$(CONFIG_ARCH_MEDIATEK) += \
         mt8127-moose.dtb \
         mt8135-evbp1.dtb
 dtb-$(CONFIG_ARCH_ZX) += zx296702-ad1.dtb
+dtb-$(CONFIG_ARCH_ASPEED) += aspeed-bmc-opp-palmetto.dtb
 endif
 
 dtstree         := $(srctree)/$(src)
diff --git a/arch/arm/boot/dts/aspeed-bmc-opp-palmetto.dts b/arch/arm/boot/dts/aspeed-bmc-opp-palmetto.dts
new file mode 100644
index 000000000000..cc5fcf2940bf
--- /dev/null
+++ b/arch/arm/boot/dts/aspeed-bmc-opp-palmetto.dts
@@ -0,0 +1,25 @@
+/dts-v1/;
+
+#include "aspeed-g4.dtsi"
+
+/ {
+        model = "Palmetto BMC";
+        compatible = "tyan,palmetto-bmc", "aspeed,ast2400";
+
+        aliases {
+                serial4 = &uart5;
+        };
+
+        chosen {
+                stdout-path = &uart5;
+                bootargs = "console=ttyS4,38400 earlyprintk";
+        };
+
+        memory {
+                reg = <0x40000000 0x10000000>;
+        };
+};
+
+&uart5 {
+        status = "okay";
+};
diff --git a/arch/arm/boot/dts/aspeed-g4.dtsi b/arch/arm/boot/dts/aspeed-g4.dtsi
new file mode 100644
index 000000000000..22dee5937d5c
--- /dev/null
+++ b/arch/arm/boot/dts/aspeed-g4.dtsi
@@ -0,0 +1,161 @@
+#include "skeleton.dtsi"
+
+/ {
+        model = "Aspeed BMC";
+        compatible = "aspeed,ast2400";
+        #address-cells = <1>;
+        #size-cells = <1>;
+        interrupt-parent = <&vic>;
+
+        cpus {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                cpu@0 {
+                        compatible = "arm,arm926ej-s";
+                        device_type = "cpu";
+                        reg = <0>;
+                };
+        };
+
+        clocks {
+                clk_clkin: clk_clkin {
+                        #clock-cells = <0>;
+                        compatible = "fixed-clock";
+                        clock-frequency = <48000000>;
+                };
+
+        };
+
+        ahb {
+                compatible = "simple-bus";
+                #address-cells = <1>;
+                #size-cells = <1>;
+                ranges;
+
+                vic: interrupt-controller@1e6c0080 {
+                        compatible = "aspeed,ast2400-vic";
+                        interrupt-controller;
+                        #interrupt-cells = <1>;
+                        valid-sources = <0xffffffff 0x0007ffff>;
+                        reg = <0x1e6c0080 0x80>;
+                };
+
+                apb {
+                        compatible = "simple-bus";
+                        #address-cells = <1>;
+                        #size-cells = <1>;
+                        ranges;
+
+                        clk_hpll: clk_hpll@1e6e2070 {
+                                #clock-cells = <0>;
+                                compatible = "aspeed,g4-hpll-clock";
+                                reg = <0x1e6e2070 0x4>;
+                                clocks = <&clk_clkin>;
+                        };
+
+                        clk_apb: clk_apb@1e6e2008 {
+                                #clock-cells = <0>;
+                                compatible = "aspeed,g4-apb-clock";
+                                reg = <0x1e6e2008 0x4>;
+                                clocks = <&clk_hpll>;
+                        };
+
+                        clk_uart: clk_uart@1e6e2008 {
+                                #clock-cells = <0>;
+                                compatible = "aspeed,uart-clock";
+                                reg = <0x1e6e202c 0x4>;
+                        };
+
+                        sram@1e720000 {
+                                compatible = "mmio-sram";
+                                reg = <0x1e720000 0x8000>;      // 32K
+                        };
+
+                        timer: timer@1e782000 {
+                                compatible = "aspeed,ast2400-timer";
+                                reg = <0x1e782000 0x90>;
+                                // The moxart_timer driver registers only one
+                                // interrupt and assumes it's for timer 1
+                                //interrupts = <16 17 18 35 36 37 38 39>;
+                                interrupts = <16>;
+                                clocks = <&clk_apb>;
+                        };
+
+                        wdt1: wdt@1e785000 {
+                                compatible = "aspeed,wdt";
+                                reg = <0x1e785000 0x1c>;
+                                interrupts = <27>;
+                        };
+
+                        wdt2: wdt@1e785020 {
+                                compatible = "aspeed,wdt";
+                                reg = <0x1e785020 0x1c>;
+                                interrupts = <27>;
+                                clocks = <&clk_apb>;
+                                status = "disabled";
+                        };
+
+                        uart1: serial@1e783000 {
+                                compatible = "ns16550a";
+                                reg = <0x1e783000 0x1000>;
+                                reg-shift = <2>;
+                                interrupts = <9>;
+                                clocks = <&clk_uart>;
+                                no-loopback-test;
+                                status = "disabled";
+                        };
+
+                        uart2: serial@1e78d000 {
+                                compatible = "ns16550a";
+                                reg = <0x1e78d000 0x1000>;
+                                reg-shift = <2>;
+                                interrupts = <32>;
+                                clocks = <&clk_uart>;
+                                no-loopback-test;
+                                status = "disabled";
+                        };
+
+                        uart3: serial@1e78e000 {
+                                compatible = "ns16550a";
+                                reg = <0x1e78e000 0x1000>;
+                                reg-shift = <2>;
+                                interrupts = <33>;
+                                clocks = <&clk_uart>;
+                                no-loopback-test;
+                                status = "disabled";
+                        };
+
+                        uart4: serial@1e78f000 {
+                                compatible = "ns16550a";
+                                reg = <0x1e78f000 0x1000>;
+                                reg-shift = <2>;
+                                interrupts = <34>;
+                                clocks = <&clk_uart>;
+                                no-loopback-test;
+                                status = "disabled";
+                        };
+
+                        uart5: serial@1e784000 {
+                                compatible = "ns16550a";
+                                reg = <0x1e784000 0x1000>;
+                                reg-shift = <2>;
+                                interrupts = <10>;
+                                clocks = <&clk_uart>;
+                                current-speed = <38400>;
+                                no-loopback-test;
+                                status = "disabled";
+                        };
+
+                        uart6: serial@1e787000 {
+                                compatible = "ns16550a";
+                                reg = <0x1e787000 0x1000>;
+                                reg-shift = <2>;
+                                interrupts = <10>;
+                                clocks = <&clk_uart>;
+                                no-loopback-test;
+                                status = "disabled";
+                        };
+                };
+        };
+};