1 files changed, 132 insertions, 0 deletions
diff --git a/sys/arm/allwinner/clk/aw_oscclk.c b/sys/arm/allwinner/clk/aw_oscclk.c
new file mode 100644
index 0000000..313111f
--- /dev/null
+++ b/sys/arm/allwinner/clk/aw_oscclk.c
@@ -0,0 +1,132 @@
+/*-
+ * Copyright (c) 2016 Jared McNeill <jmcneill@invisible.ca>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Allwinner oscillator clock
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/rman.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <dev/extres/clk/clk_fixed.h>
+
+static int
+aw_oscclk_probe(device_t dev)
+{
+	if (!ofw_bus_status_okay(dev))
+		return (ENXIO);
+
+	if (!ofw_bus_is_compatible(dev, "allwinner,sun4i-a10-osc-clk"))
+		return (ENXIO);
+
+	device_set_desc(dev, "Allwinner Oscillator Clock");
+	return (BUS_PROBE_DEFAULT);
+}
+
+static int
+aw_oscclk_attach(device_t dev)
+{
+	struct clk_fixed_def def;
+	struct clkdom *clkdom;
+	phandle_t node;
+	uint32_t freq;
+	int error;
+
+	node = ofw_bus_get_node(dev);
+
+	if (OF_getencprop(node, "clock-frequency", &freq,  sizeof(freq)) <= 0) {
+		device_printf(dev, "missing clock-frequency property\n");
+		error = ENXIO;
+		goto fail;
+	}
+
+	clkdom = clkdom_create(dev);
+
+	memset(&def, 0, sizeof(def));
+	def.clkdef.id = 1;
+	def.freq = freq;
+	error = clk_parse_ofw_clk_name(dev, node, &def.clkdef.name);
+	if (error != 0) {
+		device_printf(dev, "cannot parse clock name\n");
+		error = ENXIO;
+		goto fail;
+	}
+
+	error = clknode_fixed_register(clkdom, &def);
+	if (error != 0) {
+		device_printf(dev, "cannot register fixed clock\n");
+		error = ENXIO;
+		goto fail;
+	}
+
+	if (clkdom_finit(clkdom) != 0) {
+		device_printf(dev, "cannot finalize clkdom initialization\n");
+		error = ENXIO;
+		goto fail;
+	}
+
+	if (bootverbose)
+		clkdom_dump(clkdom);
+
+	free(__DECONST(char *, def.clkdef.name), M_OFWPROP);
+
+	return (0);
+
+fail:
+	free(__DECONST(char *, def.clkdef.name), M_OFWPROP);
+	return (error);
+}
+
+static device_method_t aw_oscclk_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		aw_oscclk_probe),
+	DEVMETHOD(device_attach,	aw_oscclk_attach),
+
+	DEVMETHOD_END
+};
+
+static driver_t aw_oscclk_driver = {
+	"aw_oscclk",
+	aw_oscclk_methods,
+	0,
+};
+
+static devclass_t aw_oscclk_devclass;
+
+EARLY_DRIVER_MODULE(aw_oscclk, simplebus, aw_oscclk_driver,
+    aw_oscclk_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);