[XS] Change in coreboot[main]: soc/mediatek/mt8189: Add timer support

[Vince Liu (Code Review)]

Attention is currently required from: Hung-Te Lin, Yidi Lin, Yu-Ping Wu.

Vince Liu has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/85689?usp=email )

Change subject: soc/mediatek/mt8189: Add timer support
......................................................................

soc/mediatek/mt8189: Add timer support

Add timer support for MT8189.

The new ICs(e.g. mt8196, mt8189) will no longer use GPT, and in order
to improve code readability, the macro name TIMER_MHZ will be used.

BUG=b:379008996
BRANCH=none
TEST=Check SYSTIMER_BASE register is configurated correctly.

Change-Id: I28c051c2e51481464f5dacb4c93f41e4f7e62501
Signed-off-by: Ke Zheng 
---
M src/soc/mediatek/mt8189/Makefile.mk
M src/soc/mediatek/mt8189/timer.c
2 files changed, 6 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/89/85689/1

diff --git a/src/soc/mediatek/mt8189/Makefile.mk b/src/soc/mediatek/mt8189/Makefile.mk
index 9b09628..efc8ff5 100644
--- a/src/soc/mediatek/mt8189/Makefile.mk
+++ b/src/soc/mediatek/mt8189/Makefile.mk
@@ -3,7 +3,7 @@
 ifeq ($(CONFIG_SOC_MEDIATEK_MT8189),y)

all-$(CONFIG_SPI_FLASH) += spi.c
-all-y += timer.c
+all-y += timer.c ../common/timer_prepare.c
 all-y += ../common/uart.c

bootblock-y += bootblock.c
diff --git a/src/soc/mediatek/mt8189/timer.c b/src/soc/mediatek/mt8189/timer.c
index 2f299ea..0d9776b 100644
--- a/src/soc/mediatek/mt8189/timer.c
+++ b/src/soc/mediatek/mt8189/timer.c
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
+/* SPDX-License-Identifier: GPL-2.0-only OR MIT */

/*
  * This file is created based on MT8189 Functional Specification
@@ -8,8 +8,11 @@
 #include <arch/lib_helpers.h>
 #include <commonlib/helpers.h>
 #include <delay.h>
+#include <soc/timer.h>

void init_timer(void)
 {
-	raw_write_cntfrq_el0(13 * MHz);
+	timer_prepare();
+
+	raw_write_cntfrq_el0(TIMER_MHZ * MHz);
 }