soc/mediatek/mt8196: Add a stub implementation of the MT8196 SoC

Add new folder and basic drivers for Mediatek SoC 'MT8196'.
Refer to MT8196_Chromebook_Application_Processor_Datasheet_V1.0 for
MT8196 SPEC detail.
This patch also enables UART and ARM arch timer.

TEST=saw the coreboot uart log to bootblock
BUG=b:317009620

Change-Id: I8190253ed000db879b04a806ca0bdf29c14be806
Signed-off-by: Jarried Lin <jarried.lin@mediatek.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83572
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/src/soc/mediatek/mt8196/soc.c b/src/soc/mediatek/mt8196/soc.c
new file mode 100644
index 0000000000..b77735ceed
--- /dev/null
+++ b/src/soc/mediatek/mt8196/soc.c
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <device/device.h>
+#include <soc/emi.h>
+#include <symbols.h>
+
+static void soc_read_resources(struct device *dev)
+{
+	ram_range(dev, 0, (uintptr_t)_dram, sdram_size());
+}
+
+static void soc_init(struct device *dev)
+{
+}
+
+static struct device_operations soc_ops = {
+	.read_resources = soc_read_resources,
+	.set_resources = noop_set_resources,
+	.init = soc_init,
+};
+
+static void enable_soc_dev(struct device *dev)
+{
+	dev->ops = &soc_ops;
+}
+
+struct chip_operations soc_mediatek_mt8196_ops = {
+	.name = "SOC Mediatek MT8196",
+	.enable_dev = enable_soc_dev,
+};