mediatek: mt8183: add timer V20 compensation
add timer driver.
Change-Id: I60a7273f922233a618a6163b802c0858ed89f75f
diff --git a/plat/mediatek/mt8183/drivers/timer/mt_timer.c b/plat/mediatek/mt8183/drivers/timer/mt_timer.c
new file mode 100644
index 0000000..0da4815
--- /dev/null
+++ b/plat/mediatek/mt8183/drivers/timer/mt_timer.c
@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2020, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#include <arch_helpers.h>
+#include <common/debug.h>
+#include <lib/mmio.h>
+#include <mcucfg.h>
+#include <mt_timer.h>
+#include <platform_def.h>
+
+static void enable_systimer_compensation(void)
+{
+ unsigned int reg;
+
+ reg = mmio_read_32(CNTCR_REG);
+ reg &= ~COMP_15_EN;
+ reg |= COMP_20_EN;
+ mmio_write_32(CNTCR_REG, reg);
+
+ NOTICE("[systimer] CNTCR_REG(0x%x)\n", mmio_read_32(CNTCR_REG));
+}
+
+void mt_systimer_init(void)
+{
+ /* systimer is default on, so we only enable systimer compensation */
+ enable_systimer_compensation();
+}