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scsi: ufs: host: mediatek: Change ref-clk timeout policy

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Update 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@mediatek.com>
Link: https://lore.kernel.org/r/20250722030841.1998783-4-peter.wang@mediatek.com
Reviewed-by: Chun-Hung Wu <chun-hung.wu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Peter Wang 2025-07-22 11:07:18 +08:00 committed by Martin K. Petersen
parent a84a9ba788
commit 16b30c7a4c
1 changed files with 10 additions and 1 deletions
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11
drivers/ufs/host/ufs-mediatek.c
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@ -351,7 +351,16 @@ 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;