powerpc/microwatt: Device-tree updates

Microwatt now implements ISA v3.1 (SFFS compliancy subset), including
prefixed instructions, scv/rfscv, and the FSCR, HFSCR, TAR, and CTRL
registers.  The privileged mode of operation is now hypervisor mode
and there is no privileged non-hypervisor mode; the MSR[HV] bit is
forced to 1.

Besides updating the ibm,powerpc-cpu-features property to reflect the
above, this also makes the following changes relating to peripheral
devices:

- Add gpio controller.
- Remove high-speed property from SD controller, for the case where
  the interface is connected through 200 ohm protection resisters.
- Put an alias for the ethernet in /chosen.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Acked-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/Z5xtdGSacrWz7swi@thinks.paulus.ozlabs.org

arch/powerpc/boot/dts/microwatt.dts

@@ -1,4 +1,5 @@
 /dts-v1/;
+#include <dt-bindings/gpio/gpio.h>
 
 / {
 	#size-cells = <0x02>;
@@ -8,6 +9,7 @@
 
 	aliases {
 		serial0 = &UART0;
+		ethernet = &enet0;
 	};
 
 	reserved-memory {
@@ -35,40 +37,79 @@
 
 		ibm,powerpc-cpu-features {
 			display-name = "Microwatt";
-			isa = <3000>;
+			isa = <3010>;
 			device_type = "cpu-features";
 			compatible = "ibm,powerpc-cpu-features";
 
 			mmu-radix {
 				isa = <3000>;
-				usable-privilege = <2>;
+				usable-privilege = <6>;
+				os-support = <0>;
 			};
 
 			little-endian {
-				isa = <2050>;
-				usable-privilege = <3>;
+				isa = <0>;
+				usable-privilege = <7>;
+				os-support = <0>;
 				hwcap-bit-nr = <1>;
 			};
 
 			cache-inhibited-large-page {
-				isa = <2040>;
-				usable-privilege = <2>;
+				isa = <0>;
+				usable-privilege = <6>;
+				os-support = <0>;
 			};
 
 			fixed-point-v3 {
 				isa = <3000>;
-				usable-privilege = <3>;
+				usable-privilege = <7>;
 			};
 
 			no-execute {
-				isa = <2010>;
+				isa = <0x00>;
 				usable-privilege = <2>;
+				os-support = <0>;
 			};
 
 			floating-point {
+				hfscr-bit-nr = <0>;
 				hwcap-bit-nr = <27>;
 				isa = <0>;
-				usable-privilege = <3>;
+				usable-privilege = <7>;
+				hv-support = <1>;
+				os-support = <0>;
+			};
+
+			prefixed-instructions {
+				hfscr-bit-nr = <13>;
+				fscr-bit-nr = <13>;
+				isa = <3010>;
+				usable-privilege = <7>;
+				os-support = <1>;
+				hv-support = <1>;
+			};
+
+			tar {
+				hfscr-bit-nr = <8>;
+				fscr-bit-nr = <8>;
+				isa = <2070>;
+				usable-privilege = <7>;
+				os-support = <1>;
+				hv-support = <1>;
+				hwcap-bit-nr = <58>;
+			};
+
+			control-register {
+				isa = <0>;
+				usable-privilege = <7>;
+			};
+
+			system-call-vectored {
+				isa = <3000>;
+				usable-privilege = <7>;
+				os-support = <1>;
+				fscr-bit-nr = <12>;
+				hwcap-bit-nr = <52>;
 			};
 		};
 
@@ -138,7 +179,18 @@
 			interrupts = <0x10 0x1>;
 		};
 
-		ethernet@8020000 {
+		gpio: gpio@7000 {
+			device_type = "gpio";
+			compatible = "faraday,ftgpio010";
+			gpio-controller;
+			#gpio-cells = <2>;
+			reg = <0x7000 0x80>;
+			interrupts = <0x14 1>;
+			interrupt-controller;
+			#interrupt-cells = <2>;
+		};
+
+		enet0: ethernet@8020000 {
 			compatible = "litex,liteeth";
 			reg = <0x8021000 0x100
 				0x8020800 0x100
@@ -160,7 +212,6 @@
 			reg-names = "phy", "core", "reader", "writer", "irq";
 			bus-width = <4>;
 			interrupts = <0x13 1>;
-			cap-sd-highspeed;
 			clocks = <&sys_clk>;
 		};
 	};