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Diffstat (limited to 'plat/mediatek/mt6795/plat_delay_timer.c')
-rw-r--r--plat/mediatek/mt6795/plat_delay_timer.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/plat/mediatek/mt6795/plat_delay_timer.c b/plat/mediatek/mt6795/plat_delay_timer.c
new file mode 100644
index 00000000..9df28677
--- /dev/null
+++ b/plat/mediatek/mt6795/plat_delay_timer.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch_helpers.h>
+#include <delay_timer.h>
+#include <platform_def.h>
+
+static uint32_t plat_get_timer_value(void)
+{
+ /*
+ * Generic delay timer implementation expects the timer to be a down
+ * counter. We apply bitwise NOT operator to the tick values returned
+ * by read_cntpct_el0() to simulate the down counter.
+ */
+ return (uint32_t)(~read_cntpct_el0());
+}
+
+static const timer_ops_t plat_timer_ops = {
+ .get_timer_value = plat_get_timer_value,
+ .clk_mult = 1,
+ .clk_div = SYS_COUNTER_FREQ_IN_MHZ,
+};
+
+void plat_delay_timer_init(void)
+{
+ timer_init(&plat_timer_ops);
+}