Merge "scsi: ufs-msm: inform PHY about analog rails power down" (72a9cd39) · Commits · e / devices / android_kernel_sony_msm8994

drivers/scsi/ufs/ufs-msm.c

+13 −0

Original line number	Original line	Diff line number	Diff line
	@@ -1754,6 +1754,13 @@ static int msm_ufs_phy_power_on(struct msm_ufs_phy *phy)
	if (err)		if (err)
	goto out;		goto out;

			writel_relaxed(0x1, phy->mmio + UFS_PHY_POWER_DOWN_CONTROL);
			/*
			* Before any transactions involving PHY, ensure PHY knows that it's
			* analog rail is powered ON.
			*/
			mb();

	/* vdda_pll also enables ref clock LDOs so enable it first */		/* vdda_pll also enables ref clock LDOs so enable it first */
	err = msm_ufs_phy_enable_vreg(phy, &phy->vdda_pll);		err = msm_ufs_phy_enable_vreg(phy, &phy->vdda_pll);
	if (err)		if (err)
	@@ -2013,6 +2020,12 @@ static int msm_ufs_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
	*/		*/
	if (!ufshcd_is_link_active(hba)) {		if (!ufshcd_is_link_active(hba)) {
	msm_ufs_disable_phy_ref_clk(phy);		msm_ufs_disable_phy_ref_clk(phy);
			writel_relaxed(0x0, phy->mmio + UFS_PHY_POWER_DOWN_CONTROL);
			/*
			* Ensure PHY knows that PHY analog rail is going to be powered
			* down.
			*/
			mb();
	msm_ufs_phy_disable_vreg(phy, &phy->vdda_phy);		msm_ufs_phy_disable_vreg(phy, &phy->vdda_phy);
	msm_ufs_phy_disable_vreg(phy, &phy->vdda_pll);		msm_ufs_phy_disable_vreg(phy, &phy->vdda_pll);
	}		}