diff options
author | Peter Wang <peter.wang@mediatek.com> | 2022-06-23 06:50:48 +0300 |
---|---|---|
committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-06-28 06:17:36 +0300 |
commit | f53f19135765780f93dd0c9506a138d1b27ffd0e (patch) | |
tree | 1371c0111fb3a80430d31a963f73dda7bb9d60ae /drivers/ufs/host/ufs-mediatek.c | |
parent | 2bae03a6ac985fe80a7a228af3bcc2d5dbe43381 (diff) | |
download | linux-f53f19135765780f93dd0c9506a138d1b27ffd0e.tar.xz |
scsi: ufs: ufs-mediatek: Add stage information for ref-clk control
Add "PRE_CHANGE" and "POST_CHANGE" information for ref-clk control to
precisely configure the low-power state of the parent of ref-clk.
Link: https://lore.kernel.org/r/20220623035052.18802-5-stanley.chu@mediatek.com
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/ufs/host/ufs-mediatek.c')
-rw-r--r-- | drivers/ufs/host/ufs-mediatek.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c index b15351c2235b..0cc7d4faccec 100644 --- a/drivers/ufs/host/ufs-mediatek.c +++ b/drivers/ufs/host/ufs-mediatek.c @@ -244,8 +244,9 @@ static int ufs_mtk_setup_ref_clk(struct ufs_hba *hba, bool on) if (host->ref_clk_enabled == on) return 0; + ufs_mtk_ref_clk_notify(on, PRE_CHANGE, res); + if (on) { - ufs_mtk_ref_clk_notify(on, res); ufshcd_writel(hba, REFCLK_REQUEST, REG_UFS_REFCLK_CTRL); } else { ufshcd_delay_us(host->ref_clk_gating_wait_us, 10); @@ -267,7 +268,7 @@ 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, res); + ufs_mtk_ref_clk_notify(host->ref_clk_enabled, POST_CHANGE, res); return -ETIMEDOUT; @@ -275,8 +276,8 @@ out: host->ref_clk_enabled = on; if (on) ufshcd_delay_us(host->ref_clk_ungating_wait_us, 10); - else - ufs_mtk_ref_clk_notify(on, res); + + ufs_mtk_ref_clk_notify(on, POST_CHANGE, res); return 0; } |