sam3x support.

lib/sam3x/pmc.c

@@ -0,0 +1,44 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2013 Gareth McMullin <gareth@blacksphere.co.nz>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/sam3x/pmc.h>
+
+void pmc_plla_config(u8 mul, u8 div)
+{
+	CKGR_PLLAR = CKGR_PLLAR_ONE | (mul << 16) |
+			CKGR_PLLAR_PLLACOUNT_MASK | div;
+	while (!(PMC_SR & PMC_SR_LOCKA));
+}
+
+void pmc_peripheral_clock_enable(u8 pid)
+{
+	if (pid < 32)
+		PMC_PCER0 = 1 << pid;
+	else
+		PMC_PCER1 = 1 << (pid & 31);
+}
+
+void pmc_peripheral_clock_disable(u8 pid)
+{
+	if (pid < 32)
+		PMC_PCDR0 = 1 << pid;
+	else
+		PMC_PCDR1 = 1 << (pid & 31);
+}
+