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scsi: ufs-msm: switch off PHY PLL power rail during hibern8

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If UniPro link is in Hibern8 state, low noise analog power rail for PLL
can be switched off along with main PHY analog power.

Change-Id: I20b113e5f004c824c330f72dc7649dac961bfe3e
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
This commit is contained in:
Subhash Jadavani 2013-10-04 16:23:14 +05:30 • committed by David Keitel
parent 8cdca82049
commit 461a7044f1
1 changed files with 4 additions and 7 deletions
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11
drivers/scsi/ufs/ufs-msm.c
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@ -1259,16 +1259,13 @@ static int msm_ufs_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
msm_ufs_disable_phy_iface_clk(phy);
/*
* If UniPro link is not active, PHY ref_clk and main PHY analog power
* can be switched off.
* If UniPro link is not active, PHY ref_clk, main PHY analog power
* rail and low noise analog power rail for PLL can be switched off.
*/
if (!ufshcd_is_link_active(hba)) {
msm_ufs_disable_phy_ref_clk(phy);
ret = msm_ufs_phy_disable_vreg(phy, &phy->vdda_phy);
/*
* TODO: Check if "vdda_pll" can voted off when link is hibern8
* or power off state?
*/
msm_ufs_phy_disable_vreg(phy, &phy->vdda_phy);
msm_ufs_phy_disable_vreg(phy, &phy->vdda_pll);
}
out: