soc/mediatek: Move the SSPM driver to common

The SSPM driver can be shared by MT8183, MT8192 and MT8195.

TEST=emerge-{asurada, kukui} coreboot;

Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Change-Id: If9779853becb298eeeabb3dc6096bc474baae202
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55050
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

2 files changed, 39 insertions, 0 deletions

diff --git a/src/soc/mediatek/common/include/soc/sspm.h b/src/soc/mediatek/common/include/soc/sspm.h
new file mode 100644
index 0000000000..ff405ce762
--- /dev/null
+++ b/src/soc/mediatek/common/include/soc/sspm.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef SOC_MEDIATEK_COMMON_SSPM_H
+#define SOC_MEDIATEK_COMMON_SSPM_H
+
+#include <soc/addressmap.h>
+#include <types.h>
+
+struct sspm_regs {
+	u32 sw_rstn;
+};
+static struct sspm_regs *const sspm_reg = (void *)SSPM_CFG_BASE;
+void sspm_init(void);
+#endif  /* SOC_MEDIATEK_COMMON_SSPM_H */
diff --git a/src/soc/mediatek/common/sspm.c b/src/soc/mediatek/common/sspm.c
new file mode 100644
index 0000000000..0a4d5b0cd6
--- /dev/null
+++ b/src/soc/mediatek/common/sspm.c
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <device/mmio.h>
+#include <soc/mcu_common.h>
+#include <soc/sspm.h>
+#include <soc/symbols.h>
+
+static void reset_sspm(struct mtk_mcu *mcu)
+{
+	write32(&sspm_reg->sw_rstn, 0x1);
+}
+
+static struct mtk_mcu sspm = {
+	.firmware_name = CONFIG_SSPM_FIRMWARE,
+	.run_address = (void *)SSPM_SRAM_BASE,
+	.reset = reset_sspm,
+};
+
+void sspm_init(void)
+{
+	sspm.load_buffer = _dram_dma;
+	sspm.buffer_size = REGION_SIZE(dram_dma);
+
+	mtk_init_mcu(&sspm);
+}