diff options
| author | Peter Wang <peter.wang@mediatek.com> | 2022-06-23 11:50:48 +0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-06-27 23:17:36 -0400 |
| commit | f53f19135765780f93dd0c9506a138d1b27ffd0e (patch) | |
| tree | 1371c0111fb3a80430d31a963f73dda7bb9d60ae /drivers/ufs | |
| parent | 2bae03a6ac985fe80a7a228af3bcc2d5dbe43381 (diff) | |
| download | linux-f53f19135765780f93dd0c9506a138d1b27ffd0e.tar.bz2 | |
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')
| -rw-r--r-- | drivers/ufs/host/ufs-mediatek.c | 9 | ||||
| -rw-r--r-- | drivers/ufs/host/ufs-mediatek.h | 4 |
2 files changed, 7 insertions, 6 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; } diff --git a/drivers/ufs/host/ufs-mediatek.h b/drivers/ufs/host/ufs-mediatek.h index f5c1c643dd52..c12ceb4d941f 100644 --- a/drivers/ufs/host/ufs-mediatek.h +++ b/drivers/ufs/host/ufs-mediatek.h @@ -189,8 +189,8 @@ static void _ufs_mtk_smc(struct ufs_mtk_smc_arg s) #define ufs_mtk_crypto_ctrl(res, enable) \ ufs_mtk_smc(UFS_MTK_SIP_CRYPTO_CTRL, &(res), enable) -#define ufs_mtk_ref_clk_notify(on, res) \ - ufs_mtk_smc(UFS_MTK_SIP_REF_CLK_NOTIFICATION, &(res), on) +#define ufs_mtk_ref_clk_notify(on, stage, res) \ + ufs_mtk_smc(UFS_MTK_SIP_REF_CLK_NOTIFICATION, &(res), on, stage) #define ufs_mtk_device_reset_ctrl(high, res) \ ufs_mtk_smc(UFS_MTK_SIP_DEVICE_RESET, &(res), high) |