summaryrefslogtreecommitdiffstats
path: root/kernel/arch/mips/pistachio/time.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/arch/mips/pistachio/time.c')
-rw-r--r--kernel/arch/mips/pistachio/time.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/kernel/arch/mips/pistachio/time.c b/kernel/arch/mips/pistachio/time.c
new file mode 100644
index 000000000..67889fcea
--- /dev/null
+++ b/kernel/arch/mips/pistachio/time.c
@@ -0,0 +1,52 @@
+/*
+ * Pistachio clocksource/timer setup
+ *
+ * Copyright (C) 2014 Google, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/clocksource.h>
+#include <linux/init.h>
+#include <linux/irqchip/mips-gic.h>
+#include <linux/of.h>
+
+#include <asm/time.h>
+
+unsigned int get_c0_compare_int(void)
+{
+ return gic_get_c0_compare_int();
+}
+
+int get_c0_perfcount_int(void)
+{
+ return gic_get_c0_perfcount_int();
+}
+
+void __init plat_time_init(void)
+{
+ struct device_node *np;
+ struct clk *clk;
+
+ of_clk_init(NULL);
+ clocksource_of_init();
+
+ np = of_get_cpu_node(0, NULL);
+ if (!np) {
+ pr_err("Failed to get CPU node\n");
+ return;
+ }
+
+ clk = of_clk_get(np, 0);
+ if (IS_ERR(clk)) {
+ pr_err("Failed to get CPU clock: %ld\n", PTR_ERR(clk));
+ return;
+ }
+
+ mips_hpt_frequency = clk_get_rate(clk) / 2;
+ clk_put(clk);
+}