phy: ufs-qcom: Refactor all init steps into phy_poweron

The phy code was using implicit sequencing between the PHY driver
and the UFS driver to implement certain hardware requirements.
Specifically, the PHY reset register in the UFS controller needs
to be deasserted before serdes start occurs in the PHY.

Before this change, the code was doing this by utilizing the two
phy callbacks, phy_init() and phy_poweron(), as "init step 1" and
"init step 2", where the UFS driver would deassert reset between
these two steps.

This makes it challenging to power off the regulators in suspend,
as regulators are initialized in init, not in poweron(), but only
poweroff() is called during suspend, not exit().

For UFS, move the actual firing up of the PHY to phy_poweron() and
phy_poweroff() callbacks, rather than init()/exit(). UFS calls
phy_poweroff() during suspend, so now all clocks and regulators for
the phy can be powered down during suspend.

QMP is a little tricky because the PHY is also shared with PCIe and
USB3, which have their own definitions for init() and poweron(). Rename
the meaty functions to _enable() and _disable() to disentangle from the
PHY core names, and then create two different ops structures: one for
UFS and one for the other PHY types.

In phy-qcom-ufs, remove the 'is_powered_on' and 'is_started' guards,
as the generic PHY code does the reference counting. The
14/20nm-specific init functions get collapsed into the generic power_on()
function, with the addition of a calibrate() callback specific to 14/20nm.

Signed-off-by: Evan Green <evgreen@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/phy/qualcomm/phy-qcom-ufs-i.h b/drivers/phy/qualcomm/phy-qcom-ufs-i.h
index ba77348d807c..109ddd67be82 100644
--- a/drivers/phy/qualcomm/phy-qcom-ufs-i.h
+++ b/drivers/phy/qualcomm/phy-qcom-ufs-i.h
@@ -97,8 +97,6 @@ struct ufs_qcom_phy {
 	char name[UFS_QCOM_PHY_NAME_LEN];
 	struct ufs_qcom_phy_calibration *cached_regs;
 	int cached_regs_table_size;
-	bool is_powered_on;
-	bool is_started;
 	struct ufs_qcom_phy_specific_ops *phy_spec_ops;
 
 	enum phy_mode mode;
@@ -117,6 +115,7 @@ struct ufs_qcom_phy {
  * and writes to QSERDES_RX_SIGDET_CNTRL attribute
  */
 struct ufs_qcom_phy_specific_ops {
+	int (*calibrate)(struct ufs_qcom_phy *ufs_qcom_phy, bool is_rate_B);
 	void (*start_serdes)(struct ufs_qcom_phy *phy);
 	int (*is_physical_coding_sublayer_ready)(struct ufs_qcom_phy *phy);
 	void (*set_tx_lane_enable)(struct ufs_qcom_phy *phy, u32 val);
@@ -134,7 +133,6 @@ struct phy *ufs_qcom_phy_generic_probe(struct platform_device *pdev,
 			struct ufs_qcom_phy *common_cfg,
 			const struct phy_ops *ufs_qcom_phy_gen_ops,
 			struct ufs_qcom_phy_specific_ops *phy_spec_ops);
-int ufs_qcom_phy_get_reset(struct ufs_qcom_phy *phy_common);
 int ufs_qcom_phy_calibrate(struct ufs_qcom_phy *ufs_qcom_phy,
 			struct ufs_qcom_phy_calibration *tbl_A, int tbl_size_A,
 			struct ufs_qcom_phy_calibration *tbl_B, int tbl_size_B,