summaryrefslogtreecommitdiffstats
path: root/drivers/clocksource
diff options
context:
space:
mode:
authorAndrew Bresticker <abrestic@chromium.org>2014-10-20 21:03:58 +0200
committerRalf Baechle <ralf@linux-mips.org>2014-11-24 07:45:14 +0100
commitfa5635a277171021d364f6a3fab4addce8f358d2 (patch)
tree9fff06b8d87eba632d5abc5346733cd01b368658 /drivers/clocksource
parentirqchip: mips-gic: Use GIC_SH_WEDGE_{SET,CLR} macros (diff)
downloadlinux-fa5635a277171021d364f6a3fab4addce8f358d2.tar.xz
linux-fa5635a277171021d364f6a3fab4addce8f358d2.zip
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>
Diffstat (limited to 'drivers/clocksource')
-rw-r--r--drivers/clocksource/Kconfig4
-rw-r--r--drivers/clocksource/Makefile1
-rw-r--r--drivers/clocksource/mips-gic-timer.c32
3 files changed, 37 insertions, 0 deletions
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);
+}