mediatek: mt8192: add timer support

add timer driver.
Signed-off-by: Dehui Sun <dehui.sun@mediatek.com>
Change-Id: I07448d85a15bb14577b05e4f302860d609420ba7

plat/mediatek/mt8192/drivers/timer/mt_timer.c

+/*
+ * Copyright (c) 2020, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch_helpers.h>
+#include <mt_timer.h>
+#include <platform_def.h>
+
+
+uint64_t normal_time_base;
+uint64_t atf_time_base;
+
+void sched_clock_init(uint64_t normal_base, uint64_t atf_base)
+{
+	normal_time_base += normal_base;
+	atf_time_base = atf_base;
+}
+
+uint64_t sched_clock(void)
+{
+	uint64_t cval;
+	uint64_t rel_base;
+
+	rel_base = read_cntpct_el0() - atf_time_base;
+	cval = ((rel_base * 1000U) / SYS_COUNTER_FREQ_IN_MHZ)
+		- normal_time_base;
+	return cval;
+}

plat/mediatek/mt8192/drivers/timer/mt_timer.h

+/*
+ * Copyright (c) 2020, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef MT_TIMER_H
+#define MT_TIMER_H
+
+#define SYSTIMER_BASE       (0x10017000)
+#define CNTCR_REG           (SYSTIMER_BASE + 0x0)
+#define CNTSR_REG           (SYSTIMER_BASE + 0x4)
+#define CNTSYS_L_REG        (SYSTIMER_BASE + 0x8)
+#define CNTSYS_H_REG        (SYSTIMER_BASE + 0xc)
+
+#define TIEO_EN             (1 << 3)
+#define COMP_15_EN          (1 << 10)
+#define COMP_20_EN          (1 << 11)
+#define COMP_25_EN          (1 << 12)
+
+#define COMP_FEATURE_MASK (COMP_15_EN | COMP_20_EN | COMP_25_EN | TIEO_EN)
+#define COMP_15_MASK (COMP_15_EN)
+#define COMP_20_MASK (COMP_20_EN | TIEO_EN)
+#define COMP_25_MASK (COMP_20_EN | COMP_25_EN)
+
+
+void sched_clock_init(uint64_t normal_base, uint64_t atf_base);
+uint64_t sched_clock(void);
+
+#endif /* MT_TIMER_H */

plat/mediatek/mt8192/platform.mk

@@ -10,7 +10,8 @@ MTK_PLAT_SOC  := ${MTK_PLAT}/${PLAT}
 PLAT_INCLUDES := -I${MTK_PLAT}/common/                            \
                  -I${MTK_PLAT_SOC}/include/                       \
                  -I${MTK_PLAT_SOC}/drivers/                       \
-                 -I${MTK_PLAT_SOC}/drivers/gpio/
+                 -I${MTK_PLAT_SOC}/drivers/gpio/                  \
+                 -I${MTK_PLAT_SOC}/drivers/timer/
 
 GICV3_SUPPORT_GIC600        :=      1
 include drivers/arm/gic/v3/gicv3.mk
@@ -37,7 +38,8 @@ BL31_SOURCES    += common/desc_image_load.c                              \
                    ${MTK_PLAT_SOC}/plat_topology.c                       \
                    ${MTK_PLAT_SOC}/plat_mt_gic.c                         \
                    ${MTK_PLAT_SOC}/plat_mt_cirq.c                        \
-                   ${MTK_PLAT_SOC}/drivers/gpio/mtgpio.c
+                   ${MTK_PLAT_SOC}/drivers/gpio/mtgpio.c                 \
+                   ${MTK_PLAT_SOC}/drivers/timer/mt_timer.c
 
 
 # Configs for A76 and A55