5 files changed, 30 insertions, 0 deletions
diff --git a/src/soc/mediatek/mt8192/Makefile.inc b/src/soc/mediatek/mt8192/Makefile.inc
index 23799663d7..cf09b3cf65 100644
--- a/src/soc/mediatek/mt8192/Makefile.inc
+++ b/src/soc/mediatek/mt8192/Makefile.inc
@@ -55,6 +55,7 @@ ramstage-y += spm.c
 ramstage-y += sspm.c
 ramstage-y += ../common/timer.c
 ramstage-y += ../common/uart.c
+ramstage-y += ufs.c
 ramstage-y += ../common/usb.c usb.c
 
 MT8192_BLOB_DIR := 3rdparty/blobs/soc/mediatek/mt8192
diff --git a/src/soc/mediatek/mt8192/include/soc/addressmap.h b/src/soc/mediatek/mt8192/include/soc/addressmap.h
index c9b39076b1..7660bccac1 100644
--- a/src/soc/mediatek/mt8192/include/soc/addressmap.h
+++ b/src/soc/mediatek/mt8192/include/soc/addressmap.h
@@ -49,6 +49,7 @@ enum {
 	SPI7_BASE		= IO_PHYS + 0x0101E000,
 	SSUSB_IPPC_BASE		= IO_PHYS + 0x01203e00,
 	SFLASH_REG_BASE		= IO_PHYS + 0x01234000,
+	UFSHCI_BASE		= IO_PHYS + 0x01270000,
 	EFUSEC_BASE		= IO_PHYS + 0x01C10000,
 	IOCFG_RM_BASE		= IO_PHYS + 0x01C20000,
 	I2C_BASE		= IO_PHYS + 0x01CB0000,
diff --git a/src/soc/mediatek/mt8192/include/soc/ufs.h b/src/soc/mediatek/mt8192/include/soc/ufs.h
new file mode 100644
index 0000000000..70a30a9a06
--- /dev/null
+++ b/src/soc/mediatek/mt8192/include/soc/ufs.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef SOC_MEDIATEK_MT8192_UFS_H
+#define SOC_MEDIATEK_MT8192_UFS_H
+
+#include <device/mmio.h>
+#include <soc/addressmap.h>
+
+void ufs_disable_refclk(void);
+
+enum ufshci_offset {
+	REG_UFS_REFCLK_CTRL = 0x144,
+};
+
+#define UFS_REFCLK_CTRL	(UFSHCI_BASE + REG_UFS_REFCLK_CTRL)
+
+#endif /* SOC_MEDIATEK_MT8192_UFS_H */
diff --git a/src/soc/mediatek/mt8192/soc.c b/src/soc/mediatek/mt8192/soc.c
index bf9e8e794e..8696f342d4 100644
--- a/src/soc/mediatek/mt8192/soc.c
+++ b/src/soc/mediatek/mt8192/soc.c
@@ -5,6 +5,7 @@
 #include <soc/mcupm.h>
 #include <soc/mmu_operations.h>
 #include <soc/sspm.h>
+#include <soc/ufs.h>
 #include <symbols.h>
 
 static void soc_read_resources(struct device *dev)
@@ -17,6 +18,7 @@ static void soc_init(struct device *dev)
 	mtk_mmu_disable_l2c_sram();
 	mcupm_init();
 	sspm_init();
+	ufs_disable_refclk();
 }
 
 static struct device_operations soc_ops = {
diff --git a/src/soc/mediatek/mt8192/ufs.c b/src/soc/mediatek/mt8192/ufs.c
new file mode 100644
index 0000000000..2537fa7883
--- /dev/null
+++ b/src/soc/mediatek/mt8192/ufs.c
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <soc/ufs.h>
+
+void ufs_disable_refclk(void)
+{
+	/* disable ref clock to let UFSHCI release SPM signal */
+	write32((void *)UFS_REFCLK_CTRL, 0);
+}