MIPS: Netlogic: Support for multiple built-in device trees

This enables us to have a default device tree per SoC family to be built
into the kernel. The default device tree for XLP3xx has been added as part
of this change. Later this can be used to provide support default boards
for XLP2xx and XLP9xx SoCs.

Kconfig options are provided for each default device tree so that just the
needed ones can be selected to be built into the kernel.
Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/5023/Acked-by: John Crispin <blogic@openwrt.org>

arch/mips/netlogic/Kconfig

@@ -2,14 +2,23 @@ if NLM_XLP_BOARD || NLM_XLR_BOARD
 
 if NLM_XLP_BOARD
 config DT_XLP_EVP
-	bool "Built-in device tree for XLP EVP/SVP boards"
+	bool "Built-in device tree for XLP EVP boards"
 	default y
 	help
-	  Add an FDT blob for XLP EVP and SVP boards into the kernel.
+	  Add an FDT blob for XLP EVP boards into the kernel.
 	  This DTB will be used if the firmware does not pass in a DTB
 	  pointer to the kernel.  The corresponding DTS file is at
 	  arch/mips/netlogic/dts/xlp_evp.dts
 
+config DT_XLP_SVP
+	bool "Built-in device tree for XLP SVP boards"
+	default y
+	help
+	  Add an FDT blob for XLP VP boards into the kernel.
+	  This DTB will be used if the firmware does not pass in a DTB
+	  pointer to the kernel.  The corresponding DTS file is at
+	  arch/mips/netlogic/dts/xlp_svp.dts
+
 config NLM_MULTINODE
 	bool "Support for multi-chip boards"
 	depends on NLM_XLP_BOARD

arch/mips/netlogic/dts/Makefile

 obj-$(CONFIG_DT_XLP_EVP) := xlp_evp.dtb.o
+obj-$(CONFIG_DT_XLP_SVP) += xlp_svp.dtb.o

arch/mips/netlogic/dts/xlp_svp.dts

+/*
+ * XLP3XX Device Tree Source for SVP boards
+ */
+
+/dts-v1/;
+/ {
+	model = "netlogic,XLP-SVP";
+	compatible = "netlogic,xlp";
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	memory {
+		device_type = "memory";
+		reg =  <0 0x00100000 0 0x0FF00000	// 255M at 1M
+			0 0x20000000 0 0xa0000000	// 2560M at 512M
+			0 0xe0000000 0 0x40000000>;
+	};
+
+	soc {
+		#address-cells = <2>;
+		#size-cells = <1>;
+		compatible = "simple-bus";
+		ranges = <0 0  0 0x18000000  0x04000000   // PCIe CFG
+			  1 0  0 0x16000000  0x01000000>; // GBU chipselects
+
+		serial0: serial@30000 {
+			device_type = "serial";
+			compatible = "ns16550";
+			reg = <0 0x30100 0xa00>;
+			reg-shift = <2>;
+			reg-io-width = <4>;
+			clock-frequency = <133333333>;
+			interrupt-parent = <&pic>;
+			interrupts = <17>;
+		};
+		serial1: serial@31000 {
+			device_type = "serial";
+			compatible = "ns16550";
+			reg = <0 0x31100 0xa00>;
+			reg-shift = <2>;
+			reg-io-width = <4>;
+			clock-frequency = <133333333>;
+			interrupt-parent = <&pic>;
+			interrupts = <18>;
+		};
+		i2c0: ocores@32000 {
+			compatible = "opencores,i2c-ocores";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0 0x32100 0xa00>;
+			reg-shift = <2>;
+			reg-io-width = <4>;
+			clock-frequency = <32000000>;
+			interrupt-parent = <&pic>;
+			interrupts = <30>;
+		};
+		i2c1: ocores@33000 {
+			compatible = "opencores,i2c-ocores";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0 0x33100 0xa00>;
+			reg-shift = <2>;
+			reg-io-width = <4>;
+			clock-frequency = <32000000>;
+			interrupt-parent = <&pic>;
+			interrupts = <31>;
+
+			rtc@68 {
+				compatible = "dallas,ds1374";
+				reg = <0x68>;
+			};
+
+			dtt@4c {
+				compatible = "national,lm90";
+				reg = <0x4c>;
+			};
+		};
+		pic: pic@4000 {
+			interrupt-controller;
+			#address-cells = <0>;
+			#interrupt-cells = <1>;
+			reg = <0 0x4000 0x200>;
+		};
+
+		nor_flash@1,0 {
+			compatible = "cfi-flash";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			bank-width = <2>;
+			reg = <1 0 0x1000000>;
+
+			partition@0 {
+				label = "x-loader";
+				reg = <0x0 0x100000>; /* 1M */
+				read-only;
+			};
+
+			partition@100000 {
+				label = "u-boot";
+				reg = <0x100000 0x100000>; /* 1M */
+			};
+
+			partition@200000 {
+				label = "kernel";
+				reg = <0x200000 0x500000>; /* 5M */
+			};
+
+			partition@700000 {
+				label = "rootfs";
+				reg = <0x700000 0x800000>; /* 8M */
+			};
+
+			partition@f00000 {
+				label = "env";
+				reg = <0xf00000 0x100000>; /* 1M */
+				read-only;
+			};
+		};
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,115200 rdinit=/sbin/init";
+	};
+};

arch/mips/netlogic/xlp/setup.c

@@ -56,7 +56,7 @@ uint64_t nlm_io_base;
 struct nlm_soc_info nlm_nodes[NLM_NR_NODES];
 cpumask_t nlm_cpumask = CPU_MASK_CPU0;
 unsigned int nlm_threads_per_core;
-extern u32 __dtb_start[];
+extern u32 __dtb_xlp_evp_begin[], __dtb_xlp_svp_begin[], __dtb_start[];
 
 static void nlm_linux_exit(void)
 {
@@ -82,8 +82,24 @@ void __init plat_mem_setup(void)
 	 * 64-bit, so convert pointer.
 	 */
 	fdtp = (void *)(long)fw_arg0;
-	if (!fdtp)
+	if (!fdtp) {
+		switch (current_cpu_data.processor_id & 0xff00) {
+#ifdef CONFIG_DT_XLP_SVP
+		case PRID_IMP_NETLOGIC_XLP3XX:
+			fdtp = __dtb_xlp_svp_begin;
+			break;
+#endif
+#ifdef CONFIG_DT_XLP_EVP
+		case PRID_IMP_NETLOGIC_XLP8XX:
+			fdtp = __dtb_xlp_evp_begin;
+			break;
+#endif
+		default:
+			/* Pick a built-in if any, and hope for the best */
 			fdtp = __dtb_start;
+			break;
+		}
+	}
 	fdtp = phys_to_virt(__pa(fdtp));
 	early_init_devtree(fdtp);
 }