[PATCH v1 04/10] ufs: host: mediatek: Change ref-clk timeout policy

[peter.wang at mediatek.com]

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

This patch updates the timeout policy for ref-clk control.

- If a clock-on operation times out, it is assumed that the clock is
  off. The system will notify TFA to perform clock-off settings.
- If a clock-off operation times out, it is assumed that the clock
  will eventually turn off. The 'ref_clk_enabled' flag is set directly

Signed-off-by: Peter Wang <peter.wang at mediatek.com>
---
 drivers/ufs/host/ufs-mediatek.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
index 1e5cc88127b4..b4d063ade0ec 100644
--- a/drivers/ufs/host/ufs-mediatek.c
+++ b/drivers/ufs/host/ufs-mediatek.c
@@ -357,7 +357,16 @@ static int ufs_mtk_setup_ref_clk(struct ufs_hba *hba, bool on)
 
 	dev_err(hba->dev, "missing ack of refclk req, reg: 0x%x\n", value);
 
-	ufs_mtk_ref_clk_notify(host->ref_clk_enabled, POST_CHANGE, res);
+	/*
+	 * If clock on timeout, assume clock is off, notify tfa do clock
+	 * off setting.(keep DIFN disable, release resource)
+	 * If clock off timeout, assume clock will off finally,
+	 * set ref_clk_enabled directly.(keep DIFN disable, keep resource)
+	 */
+	if (on)
+		ufs_mtk_ref_clk_notify(false, POST_CHANGE, res);
+	else
+		host->ref_clk_enabled = false;
 
 	return -ETIMEDOUT;
 
-- 
2.45.2