[PATCH v1 10/10] ufs: host: mediatek: Fix device power control

[peter.wang at mediatek.com]

From: Peter Wang <peter.wang at mediatek.com>

This patch adjusts the timing of device power control to ensure
that low power mode (LPM) is entered only after VCC is turned off.
This change prevents VCCQ/VCCQ2 from entering LPM prematurely,
ensuring proper power management and device stability.

Signed-off-by: Peter Wang <peter.wang at mediatek.com>
---
 drivers/ufs/host/ufs-mediatek.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
index 934c643633d3..ec45a40f04d0 100644
--- a/drivers/ufs/host/ufs-mediatek.c
+++ b/drivers/ufs/host/ufs-mediatek.c
@@ -2347,6 +2347,13 @@ static int ufs_mtk_probe(struct platform_device *pdev)
 		host->phy_dev = phy_dev;
 	}
 
+	/*
+	 * Because the default power setting of VSx (the upper layer of
+	 * VCCQ/VCCQ2) is HWLP, we need to prevent VCCQ/VCCQ2 from
+	 * entering LPM.
+	 */
+	ufs_mtk_dev_vreg_set_lpm(hba, false);
+
 out:
 	of_node_put(phy_node);
 	of_node_put(reset_node);
-- 
2.45.2