Add rkgrf(4), a driver that makes the "generic register file" of the Rockchip

RK3399 available to other drivers through the regmap interface.

5 files changed, 94 insertions, 4 deletions

diff --git a/sys/arch/arm64/conf/GENERIC b/sys/arch/arm64/conf/GENERIC
index 1bd4c2bbcf5..6d2ace33cc9 100644
--- a/sys/arch/arm64/conf/GENERIC
+++ b/sys/arch/arm64/conf/GENERIC
@@ -1,4 +1,4 @@
-# $OpenBSD: GENERIC,v 1.24 2017/04/29 17:24:41 kettenis Exp $
+# $OpenBSD: GENERIC,v 1.25 2017/04/30 14:00:06 kettenis Exp $
 #
 # GENERIC machine description file
 #
@@ -78,6 +78,9 @@ bcmdog*		at fdt?
 dwctwo*		at fdt?
 usb*		at dwctwo?
 
+# Rockchip SoCs
+rkgrf*		at fdt? early 1
+
 # Sunxi SoCs
 sxipio*		at fdt? early 1	# GPIO pins for leds & PHYs
 gpio*		at sxipio?
diff --git a/sys/arch/arm64/conf/RAMDISK b/sys/arch/arm64/conf/RAMDISK
index 46abe2ff5db..465970b7ec7 100644
--- a/sys/arch/arm64/conf/RAMDISK
+++ b/sys/arch/arm64/conf/RAMDISK
@@ -1,4 +1,4 @@
-# $OpenBSD: RAMDISK,v 1.21 2017/04/29 17:24:41 kettenis Exp $
+# $OpenBSD: RAMDISK,v 1.22 2017/04/30 14:00:06 kettenis Exp $
 #
 # GENERIC machine description file
 #
@@ -85,6 +85,9 @@ bcmdog*		at fdt?
 dwctwo*		at fdt?
 usb*		at dwctwo?
 
+# Rockchip SoCs
+rkgrf*		at fdt? early 1
+
 # Sunxi SoCs
 sxipio*		at fdt? early 1	# GPIO pins for leds & PHYs
 gpio*		at sxipio?
diff --git a/sys/arch/arm64/conf/files.arm64 b/sys/arch/arm64/conf/files.arm64
index 95a107a8a43..8dae608f001 100644
--- a/sys/arch/arm64/conf/files.arm64
+++ b/sys/arch/arm64/conf/files.arm64
@@ -1,4 +1,4 @@
-# $OpenBSD: files.arm64,v 1.13 2017/04/29 17:24:41 kettenis Exp $
+# $OpenBSD: files.arm64,v 1.14 2017/04/30 14:00:06 kettenis Exp $
 
 maxpartitions	16
 maxusers	2 8 64
@@ -61,6 +61,7 @@ file	arch/arm64/dev/simplebus.c		simplebus
 file	dev/ofw/fdt.c
 file	dev/ofw/ofw_clock.c
 file	dev/ofw/ofw_gpio.c
+file	dev/ofw/ofw_misc.c
 file	dev/ofw/ofw_pinctrl.c
 file	dev/ofw/ofw_regulator.c
 
diff --git a/sys/dev/fdt/files.fdt b/sys/dev/fdt/files.fdt
index c5ffce01553..b1f8db12441 100644
--- a/sys/dev/fdt/files.fdt
+++ b/sys/dev/fdt/files.fdt
@@ -1,4 +1,4 @@
-#	$OpenBSD: files.fdt,v 1.10 2017/04/29 20:49:09 kettenis Exp $
+#	$OpenBSD: files.fdt,v 1.11 2017/04/30 14:00:06 kettenis Exp $
 #
 # Config file and device description for machine-independent FDT code.
 # Included by ports that need it.
@@ -57,3 +57,7 @@ file	dev/fdt/xhci_fdt.c		xhci_fdt
 device	syscon
 attach	syscon at fdt
 file	dev/fdt/syscon.c		syscon
+
+device	rkgrf
+attach	rkgrf at fdt
+file	dev/fdt/rkgrf.c			rkgrf
diff --git a/sys/dev/fdt/rkgrf.c b/sys/dev/fdt/rkgrf.c
new file mode 100644
index 00000000000..184b666fc2f
--- /dev/null
+++ b/sys/dev/fdt/rkgrf.c
@@ -0,0 +1,79 @@
+/*	$OpenBSD: rkgrf.c,v 1.1 2017/04/30 14:00:06 kettenis Exp $	*/
+/*
+ * Copyright (c) 2017 Mark Kettenis <kettenis@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+
+#include <machine/intr.h>
+#include <machine/bus.h>
+#include <machine/fdt.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_misc.h>
+#include <dev/ofw/fdt.h>
+
+struct rkgrf_softc {
+	struct device		sc_dev;
+	bus_space_tag_t		sc_iot;
+	bus_space_handle_t	sc_ioh;
+};
+
+int rkgrf_match(struct device *, void *, void *);
+void rkgrf_attach(struct device *, struct device *, void *);
+
+struct cfattach	rkgrf_ca = {
+	sizeof (struct rkgrf_softc), rkgrf_match, rkgrf_attach
+};
+
+struct cfdriver rkgrf_cd = {
+	NULL, "rkgrf", DV_DULL
+};
+
+int
+rkgrf_match(struct device *parent, void *match, void *aux)
+{
+	struct fdt_attach_args *faa = aux;
+
+	return (OF_is_compatible(faa->fa_node, "rockchip,rk3399-grf") ||
+	    OF_is_compatible(faa->fa_node, "rockchip,rk3399-pmugrf"));
+}
+
+void
+rkgrf_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct rkgrf_softc *sc = (struct rkgrf_softc *)self;
+	struct fdt_attach_args *faa = aux;
+
+	if (faa->fa_nreg < 1) {
+		printf(": no registers\n");
+		return;
+	}
+
+	sc->sc_iot = faa->fa_iot;
+
+	if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
+	    faa->fa_reg[0].size, 0, &sc->sc_ioh)) {
+		printf(": can't map registers\n");
+		return;
+	}
+
+	printf("\n");
+
+	regmap_register(faa->fa_node, sc->sc_iot, sc->sc_ioh,
+	    faa->fa_reg[0].size);
+}