From fa5635a277171021d364f6a3fab4addce8f358d2 Mon Sep 17 00:00:00 2001
From: Andrew Bresticker <abrestic@chromium.org>
Date: Mon, 20 Oct 2014 12:03:58 -0700
Subject: MIPS: Move GIC clocksource driver to drivers/clocksource/

Move the GIC clocksource driver to drivers/clocksource/mips-gic-timer.c.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Qais Yousef <qais.yousef@imgtec.com>
Cc: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8133/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
 drivers/clocksource/Kconfig          |  4 ++++
 drivers/clocksource/Makefile         |  1 +
 drivers/clocksource/mips-gic-timer.c | 32 ++++++++++++++++++++++++++++++++
 3 files changed, 37 insertions(+)
 create mode 100644 drivers/clocksource/mips-gic-timer.c

(limited to 'drivers/clocksource')

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 90420600e1eb..cb7e7f417a60 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -223,4 +223,8 @@ config CLKSRC_VERSATILE
 	  ARM Versatile, RealView and Versatile Express reference
 	  platforms.
 
+config CLKSRC_MIPS_GIC
+	bool
+	depends on MIPS_GIC
+
 endmenu
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index 756f6f10efa0..e23fc2d5fc27 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -46,3 +46,4 @@ obj-$(CONFIG_CLKSRC_METAG_GENERIC)	+= metag_generic.o
 obj-$(CONFIG_ARCH_HAS_TICK_BROADCAST)	+= dummy_timer.o
 obj-$(CONFIG_ARCH_KEYSTONE)		+= timer-keystone.o
 obj-$(CONFIG_CLKSRC_VERSATILE)		+= versatile.o
+obj-$(CONFIG_CLKSRC_MIPS_GIC)		+= mips-gic-timer.o
diff --git a/drivers/clocksource/mips-gic-timer.c b/drivers/clocksource/mips-gic-timer.c
new file mode 100644
index 000000000000..0bf28e6aca7a
--- /dev/null
+++ b/drivers/clocksource/mips-gic-timer.c
@@ -0,0 +1,32 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2012 MIPS Technologies, Inc.  All rights reserved.
+ */
+#include <linux/init.h>
+#include <linux/irqchip/mips-gic.h>
+#include <linux/time.h>
+
+static cycle_t gic_hpt_read(struct clocksource *cs)
+{
+	return gic_read_count();
+}
+
+static struct clocksource gic_clocksource = {
+	.name	= "GIC",
+	.read	= gic_hpt_read,
+	.flags	= CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+void __init gic_clocksource_init(unsigned int frequency)
+{
+	/* Set clocksource mask. */
+	gic_clocksource.mask = CLOCKSOURCE_MASK(gic_get_count_width());
+
+	/* Calculate a somewhat reasonable rating value. */
+	gic_clocksource.rating = 200 + frequency / 10000000;
+
+	clocksource_register_hz(&gic_clocksource, frequency);
+}
-- 
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