[PATCH v1 03/10] ufs: host: mediatek: Adjust clock scaling for PM flow

[peter.wang at mediatek.com]

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

Adjust clock scaling during suspend and resume in the UFS
Mediatek driver. Ensure that the clock scales down during
suspend if it was scaled up, and scales up again after resume.
This adjustment maintains proper power management.

Signed-off-by: Peter Wang <peter.wang at mediatek.com>
---
 drivers/ufs/host/ufs-mediatek.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
index e3d8e0fdbbe3..f445bc720a5e 100644
--- a/drivers/ufs/host/ufs-mediatek.c
+++ b/drivers/ufs/host/ufs-mediatek.c
@@ -1780,9 +1780,11 @@ static int ufs_mtk_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op,
 
 	ufs_mtk_sram_pwr_ctrl(false, res);
 
-	/* Release pm_qos if in scale-up mode during suspend */
-	if (ufshcd_is_clkscaling_supported(hba) && (host->clk_scale_up))
+	/* Release pm_qos/clk if in scale-up mode during suspend */
+	if (ufshcd_is_clkscaling_supported(hba) && (host->clk_scale_up)) {
 		ufshcd_pm_qos_update(hba, false);
+		_ufs_mtk_clk_scale(hba, false);
+	}
 
 	return 0;
 fail:
@@ -1810,9 +1812,11 @@ static int ufs_mtk_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
 	if (err)
 		goto fail;
 
-	/* Request pm_qos if in scale-up mode after resume */
-	if (ufshcd_is_clkscaling_supported(hba) && (host->clk_scale_up))
+	/* Request pm_qos/clk if in scale-up mode after resume */
+	if (ufshcd_is_clkscaling_supported(hba) && (host->clk_scale_up)) {
 		ufshcd_pm_qos_update(hba, true);
+		_ufs_mtk_clk_scale(hba, true);
+	}
 
 	if (ufshcd_is_link_hibern8(hba)) {
 		err = ufs_mtk_link_set_hpm(hba);
-- 
2.45.2