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| author | Ziqi Chen <ziqichen@codeaurora.org> | 2021-01-08 18:56:24 +0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-01-12 23:37:34 -0500 |
| commit | 528db9e563d1cb6abf60417ea0bedbd492c68ee4 (patch) | |
| tree | 0df27c00b852ea84ea4e2b02c554541f62f21c89 /drivers/scsi/ufs | |
| parent | dc0bfdb563c866a3c86b553ea54a1eb74f56c22e (diff) | |
| download | linux-528db9e563d1cb6abf60417ea0bedbd492c68ee4.tar.gz linux-528db9e563d1cb6abf60417ea0bedbd492c68ee4.tar.bz2 linux-528db9e563d1cb6abf60417ea0bedbd492c68ee4.zip | |
scsi: ufs: core: Fix ufs clk specs violation
According to the spec (JESD220E chapter 7.2), while powering off/on the ufs
device, REF_CLK signal should be between VSS(Ground) and VCCQ/VCCQ2.
Link: https://lore.kernel.org/r/1610103385-45755-2-git-send-email-ziqichen@codeaurora.org
Reviewed-by: Can Guo <cang@codeaurora.org>
Acked-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Ziqi Chen <ziqichen@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/ufs')
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index c6559e94f209..1701929e3627 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -8748,8 +8748,6 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) if (ret) goto set_dev_active; - ufshcd_vreg_set_lpm(hba); - disable_clks: /* * Call vendor specific suspend callback. As these callbacks may access @@ -8773,6 +8771,8 @@ disable_clks: hba->clk_gating.state); } + ufshcd_vreg_set_lpm(hba); + /* Put the host controller in low power mode if possible */ ufshcd_hba_vreg_set_lpm(hba); goto out; @@ -8840,18 +8840,18 @@ static int ufshcd_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) old_link_state = hba->uic_link_state; ufshcd_hba_vreg_set_hpm(hba); + ret = ufshcd_vreg_set_hpm(hba); + if (ret) + goto out; + /* Make sure clocks are enabled before accessing controller */ ret = ufshcd_setup_clocks(hba, true); if (ret) - goto out; + goto disable_vreg; /* enable the host irq as host controller would be active soon */ ufshcd_enable_irq(hba); - ret = ufshcd_vreg_set_hpm(hba); - if (ret) - goto disable_irq_and_vops_clks; - /* * Call vendor specific resume callback. As these callbacks may access * vendor specific host controller register space call them when the @@ -8859,7 +8859,7 @@ static int ufshcd_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) */ ret = ufshcd_vops_resume(hba, pm_op); if (ret) - goto disable_vreg; + goto disable_irq_and_vops_clks; /* For DeepSleep, the only supported option is to have the link off */ WARN_ON(ufshcd_is_ufs_dev_deepsleep(hba) && !ufshcd_is_link_off(hba)); @@ -8926,8 +8926,6 @@ set_old_link_state: ufshcd_link_state_transition(hba, old_link_state, 0); vendor_suspend: ufshcd_vops_suspend(hba, pm_op); -disable_vreg: - ufshcd_vreg_set_lpm(hba); disable_irq_and_vops_clks: ufshcd_disable_irq(hba); if (hba->clk_scaling.is_allowed) @@ -8938,6 +8936,8 @@ disable_irq_and_vops_clks: trace_ufshcd_clk_gating(dev_name(hba->dev), hba->clk_gating.state); } +disable_vreg: + ufshcd_vreg_set_lpm(hba); out: hba->pm_op_in_progress = 0; if (ret) |