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authorMasahiro Yamada <yamada.m@jp.panasonic.com>2015-02-27 02:26:42 +0900
committerMasahiro Yamada <yamada.m@jp.panasonic.com>2015-03-01 00:01:56 +0900
commit4c425570214cac091d9bdcf840b936062fb8da12 (patch)
treea8a83c219c46dec073438df0c77031418c662b25 /arch/arm/mach-uniphier/timer.c
parent1606b34aa50804227806971dbb6b82ea0bf81f55 (diff)
downloadtalos-obmc-uboot-4c425570214cac091d9bdcf840b936062fb8da12.tar.gz
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ARM: UniPhier: move SoC sources to mach-uniphier
Move arch/arm/cpu/armv7/uniphier/* -> arch/arm/mach-uniphier/* Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Diffstat (limited to 'arch/arm/mach-uniphier/timer.c')
-rw-r--r--arch/arm/mach-uniphier/timer.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/timer.c b/arch/arm/mach-uniphier/timer.c
new file mode 100644
index 0000000000..6edc0842a9
--- /dev/null
+++ b/arch/arm/mach-uniphier/timer.c
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2012-2014 Panasonic Corporation
+ * Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/arm-mpcore.h>
+
+#define PERIPHCLK (50 * 1000 * 1000) /* 50 MHz */
+#define PRESCALER ((PERIPHCLK) / (CONFIG_SYS_TIMER_RATE) - 1)
+
+static void *get_global_timer_base(void)
+{
+ void *val;
+
+ asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (val) : : "memory");
+
+ return val + GLOBAL_TIMER_OFFSET;
+}
+
+unsigned long timer_read_counter(void)
+{
+ /*
+ * ARM 64bit Global Timer is too much for our purpose.
+ * We use only lower 32 bit of the timer counter.
+ */
+ return readl(get_global_timer_base() + GTIMER_CNT_L);
+}
+
+int timer_init(void)
+{
+ /* enable timer */
+ writel(PRESCALER << 8 | 1, get_global_timer_base() + GTIMER_CTRL);
+
+ return 0;
+}
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