[rpi] Reorganize spigen(4) overlays for Raspberry Pi

- Remove CS=2 entry from spigen-rpi2 since it didn't work
- Add spigen-rpi3 overlay for Raspberry Pi 3
- Enable rpi overlay modules for GENERIC kernel on aarch64

PR:		233489
Submitted by:	bobf@mrp3.com
Reviewed by:	db
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D16088

4 files changed, 39 insertions, 13 deletions

diff --git a/sys/arm64/conf/GENERIC b/sys/arm64/conf/GENERIC
index 091414f52dc2..b1149a377ba3 100644
--- a/sys/arm64/conf/GENERIC
+++ b/sys/arm64/conf/GENERIC
@@ -296,4 +296,4 @@ options 	FDT
 device		acpi
 
 # DTBs
-makeoptions	MODULES_EXTRA="dtb/allwinner dtb/rockchip"
+makeoptions	MODULES_EXTRA="dtb/allwinner dtb/rockchip dtb/rpi"
diff --git a/sys/dts/arm/overlays/spigen-rpi2.dtso b/sys/dts/arm/overlays/spigen-rpi2.dtso
index 4b0e9fa0d856..6d3862d1406b 100644
--- a/sys/dts/arm/overlays/spigen-rpi2.dtso
+++ b/sys/dts/arm/overlays/spigen-rpi2.dtso
@@ -12,6 +12,7 @@
 	spigen0: spigen0 {
 		compatible = "freebsd,spigen";
 		reg = <0>;
+		spi-max-frequency = <500000>; /* Req'd property, override with spi(8) */
 		status = "okay";
 	};
 	spigen1: spigen1 {
@@ -20,20 +21,10 @@
 		spi-max-frequency = <500000>; /* Req'd property, override with spi(8) */
 		status = "okay";
 	};
-	spigen2: spigen2 {
-		compatible = "freebsd,spigen";
-		reg = <2>;
-		spi-max-frequency = <500000>; /* Req'd property, override with spi(8) */
-		status = "okay";
-	};
 };
 
 &{/soc/gpio@7e200000/spi0_cs_pins} {
-	brcm,pins = <8 7 16>;
+	brcm,pins = <8 7>;
 	brcm,function = <4>; /* ALT0 */
 };
 
-&{/soc/gpio@7e200000/spi0_gpio7} {
-	brcm,pins = <7 8 16 9 10 11>;
-};
-
diff --git a/sys/dts/arm64/overlays/spigen-rpi3.dtso b/sys/dts/arm64/overlays/spigen-rpi3.dtso
new file mode 100644
index 000000000000..a708699c73d5
--- /dev/null
+++ b/sys/dts/arm64/overlays/spigen-rpi3.dtso
@@ -0,0 +1,30 @@
+/* $FreeBSD$ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2837";
+};
+	
+&{/soc/spi@7e204000} {
+	status = "okay";
+	spigen0: spigen0 {
+		compatible = "freebsd,spigen";
+		reg = <0>;
+		spi-max-frequency = <500000>; /* Req'd property, override with spi(8) */
+		status = "okay";
+	};
+	spigen1: spigen1 {
+		compatible = "freebsd,spigen";
+		reg = <1>;
+		spi-max-frequency = <500000>; /* Req'd property, override with spi(8) */
+		status = "okay";
+	};
+};
+
+&{/soc/gpio@7e200000/spi0_cs_pins} {
+	brcm,pins = <8 7>;
+	brcm,function = <4>; /* ALT0 */
+};
+
diff --git a/sys/modules/dtb/rpi/Makefile b/sys/modules/dtb/rpi/Makefile
index 3205e7ae4640..692528047078 100644
--- a/sys/modules/dtb/rpi/Makefile
+++ b/sys/modules/dtb/rpi/Makefile
@@ -1,7 +1,12 @@
 # $FreeBSD$
 # DTS files for the Raspberry Pi-B
+.if ${MACHINE_ARCH:Marmv[67]*} != ""
 DTSO=	\
 	spigen-rpi-b.dtso \
-	spigen-rpi2.dtso \
+	spigen-rpi2.dtso
+.elif ${MACHINE_ARCH} == "aarch64"
+DTSO=	\
+	spigen-rpi3.dtso
+.endif
 
 .include <bsd.dtb.mk>