[PATCH v3 00/11] phy: qcom-qmp: more fixes and cleanups (set 1)

[PATCH v3 00/11] phy: qcom-qmp: more fixes and cleanups (set 1)

[Johan Hovold]

Here's the next batch of QMP driver fixes and cleanups.

Dmitry suggested that the register layout structs could all be using
per-IP version defines, which in principle sounds like a good idea. It
is a separate change though, and one which would require some more work
as it is not always clear which IP version a specific SoC uses (e.g.
some of the IPQ platforms appear to mix and match currently).

As such a change shouldn't block these clean ups, I've dropped the
merging of the IPQ SDM845 PCIe layout structs in v2.

Note that v3 has been rebased on the PCIe EP/RC-mode series to avoid two
minor conflicts:

	https://lore.kernel.org/linux-phy/20220927092207.161501-1-dmitry.baryshkov@linaro.org/

Johan


Changes in v3
 - rebase on "[PATCH v6 0/5] PCI: qcom: Support using the same PHY for
   both RC and EP" to avoid two minor conflicts

Changes in v2
 - drop the two patches that dropped the IPC and SDM845 PCIe layout
   structs
 - move the bogus register fix last in case this one needs some more
   discussion

Johan Hovold (11):
  phy: qcom-qmp: fix obsolete lane comments
  phy: qcom-qmp-combo: drop unused UFS reset
  phy: qcom-qmp-pcie: drop unused common-block registers
  phy: qcom-qmp-pcie: clean up power-down handling
  phy: qcom-qmp-pcie: move power-down update
  phy: qcom-qmp-pcie-msm8996: clean up power-down handling
  phy: qcom-qmp-combo: clean up power-down handling
  phy: qcom-qmp-ufs: clean up power-down handling
  phy: qcom-qmp-usb: clean up power-down handling
  phy: qcom-qmp-pcie: clean up clock lists
  phy: qcom-qmp-pcie: drop bogus register update

 drivers/phy/qualcomm/phy-qcom-qmp-combo.c     | 30 +++---------
 .../phy/qualcomm/phy-qcom-qmp-pcie-msm8996.c  | 12 ++---
 drivers/phy/qualcomm/phy-qcom-qmp-pcie.c      | 49 +++++--------------
 drivers/phy/qualcomm/phy-qcom-qmp-ufs.c       | 24 ++++-----
 drivers/phy/qualcomm/phy-qcom-qmp-usb.c       | 22 +++------
 5 files changed, 38 insertions(+), 99 deletions(-)

-- 
2.37.3

[PATCH v3 01/11] phy: qcom-qmp: fix obsolete lane comments

[Johan Hovold]

All QMP drivers but the MSM8996 and combo ones handle exactly one PHY
and the corresponding memory resources are not per-lane, but per PHY.

Update the obsolete comments.

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-combo.c        | 2 +-
 drivers/phy/qualcomm/phy-qcom-qmp-pcie-msm8996.c | 2 +-
 drivers/phy/qualcomm/phy-qcom-qmp-pcie.c         | 2 +-
 drivers/phy/qualcomm/phy-qcom-qmp-ufs.c          | 2 +-
 drivers/phy/qualcomm/phy-qcom-qmp-usb.c          | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
index 9807c4d935cd..8a2a35c0855b 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
@@ -2669,7 +2669,7 @@ static int qmp_combo_create(struct device *dev, struct device_node *np, int id,
 	qphy->cfg = cfg;
 	qphy->serdes = serdes;
 	/*
-	 * Get memory resources for each phy lane:
+	 * Get memory resources for each PHY:
 	 * Resources are indexed as: tx -> 0; rx -> 1; pcs -> 2.
 	 * For dual lane PHYs: tx2 -> 3, rx2 -> 4, pcs_misc (optional) -> 5
 	 * For single lane PHYs: pcs_misc (optional) -> 3.
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcie-msm8996.c b/drivers/phy/qualcomm/phy-qcom-qmp-pcie-msm8996.c
index 461f0b5d464a..707ec81c7a2a 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-pcie-msm8996.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcie-msm8996.c
@@ -777,7 +777,7 @@ static int qmp_pcie_msm8996_create(struct device *dev, struct device_node *np, i
 	qphy->cfg = cfg;
 	qphy->serdes = serdes;
 	/*
-	 * Get memory resources for each phy lane:
+	 * Get memory resources for each PHY:
 	 * Resources are indexed as: tx -> 0; rx -> 1; pcs -> 2.
 	 */
 	qphy->tx = devm_of_iomap(dev, np, 0, NULL);
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
index f3f75eda01a6..e0408c423ac6 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
@@ -2319,7 +2319,7 @@ static int qmp_pcie_create(struct device *dev, struct device_node *np, int id,
 	qphy->cfg = cfg;
 	qphy->serdes = serdes;
 	/*
-	 * Get memory resources for each phy lane:
+	 * Get memory resources for the PHY:
 	 * Resources are indexed as: tx -> 0; rx -> 1; pcs -> 2.
 	 * For dual lane PHYs: tx2 -> 3, rx2 -> 4, pcs_misc (optional) -> 5
 	 * For single lane PHYs: pcs_misc (optional) -> 3.
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
index c08d34ad1313..db5642e1f715 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
@@ -1094,7 +1094,7 @@ static int qmp_ufs_create(struct device *dev, struct device_node *np, int id,
 	qphy->cfg = cfg;
 	qphy->serdes = serdes;
 	/*
-	 * Get memory resources for each phy lane:
+	 * Get memory resources for the PHY:
 	 * Resources are indexed as: tx -> 0; rx -> 1; pcs -> 2.
 	 * For dual lane PHYs: tx2 -> 3, rx2 -> 4, pcs_misc (optional) -> 5
 	 * For single lane PHYs: pcs_misc (optional) -> 3.
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-usb.c b/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
index b84c0d4b5754..965e486ab87d 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
@@ -2581,7 +2581,7 @@ int qmp_usb_create(struct device *dev, struct device_node *np, int id,
 	qphy->cfg = cfg;
 	qphy->serdes = serdes;
 	/*
-	 * Get memory resources for each phy lane:
+	 * Get memory resources for the PHY:
 	 * Resources are indexed as: tx -> 0; rx -> 1; pcs -> 2.
 	 * For dual lane PHYs: tx2 -> 3, rx2 -> 4, pcs_misc (optional) -> 5
 	 * For single lane PHYs: pcs_misc (optional) -> 3.
-- 
2.37.3

[PATCH v3 02/11] phy: qcom-qmp-combo: drop unused UFS reset

[Johan Hovold]

Drop the unused UFS reset code which isn't used since the QMP driver
split.

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
index 8a2a35c0855b..c21512b9ab52 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
@@ -944,7 +944,6 @@ struct qmp_phy_dp_clks {
  * @phys: array of per-lane phy descriptors
  * @phy_mutex: mutex lock for PHY common block initialization
  * @init_count: phy common block initialization count
- * @ufs_reset: optional UFS PHY reset handle
  */
 struct qcom_qmp {
 	struct device *dev;
@@ -958,8 +957,6 @@ struct qcom_qmp {
 
 	struct mutex phy_mutex;
 	int init_count;
-
-	struct reset_control *ufs_reset;
 };
 
 static void qcom_qmp_v3_phy_dp_aux_init(struct qmp_phy *qphy);
@@ -2027,8 +2024,6 @@ static int qmp_combo_com_exit(struct qmp_phy *qphy)
 		return 0;
 	}
 
-	reset_control_assert(qmp->ufs_reset);
-
 	reset_control_bulk_assert(cfg->num_resets, qmp->resets);
 
 	clk_bulk_disable_unprepare(cfg->num_clks, qmp->clks);
@@ -2103,10 +2098,6 @@ static int qmp_combo_power_on(struct phy *phy)
 	else
 		qmp_combo_configure(pcs, cfg->regs, cfg->pcs_tbl, cfg->pcs_tbl_num);
 
-	ret = reset_control_deassert(qmp->ufs_reset);
-	if (ret)
-		goto err_disable_pipe_clk;
-
 	if (cfg->has_pwrdn_delay)
 		usleep_range(cfg->pwrdn_delay_min, cfg->pwrdn_delay_max);
 
-- 
2.37.3

[PATCH v3 03/11] phy: qcom-qmp-pcie: drop unused common-block registers

[Johan Hovold]

Drop the common-block register defines that are unused since the QMP
driver split.

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-pcie.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
index e0408c423ac6..bdbd18b89a8c 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
@@ -78,11 +78,6 @@ struct qmp_phy_init_tbl {
 
 /* set of registers with offsets different per-PHY */
 enum qphy_reg_layout {
-	/* Common block control registers */
-	QPHY_COM_SW_RESET,
-	QPHY_COM_POWER_DOWN_CONTROL,
-	QPHY_COM_START_CONTROL,
-	QPHY_COM_PCS_READY_STATUS,
 	/* PCS registers */
 	QPHY_SW_RESET,
 	QPHY_START_CTRL,
@@ -100,10 +95,6 @@ static const unsigned int ipq_pciephy_gen3_regs_layout[QPHY_LAYOUT_SIZE] = {
 };
 
 static const unsigned int pciephy_regs_layout[QPHY_LAYOUT_SIZE] = {
-	[QPHY_COM_SW_RESET]		= 0x400,
-	[QPHY_COM_POWER_DOWN_CONTROL]	= 0x404,
-	[QPHY_COM_START_CONTROL]	= 0x408,
-	[QPHY_COM_PCS_READY_STATUS]	= 0x448,
 	[QPHY_SW_RESET]			= 0x00,
 	[QPHY_START_CTRL]		= 0x08,
 	[QPHY_PCS_STATUS]		= 0x174,
-- 
2.37.3

[PATCH v3 04/11] phy: qcom-qmp-pcie: clean up power-down handling

[Johan Hovold]

Always define the POWER_DOWN_CONTROL register instead of falling back to
the v2 offset during power on and power off.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-pcie.c | 21 +++++++--------------
 1 file changed, 7 insertions(+), 14 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
index bdbd18b89a8c..1105d439828c 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
@@ -98,18 +98,21 @@ static const unsigned int pciephy_regs_layout[QPHY_LAYOUT_SIZE] = {
 	[QPHY_SW_RESET]			= 0x00,
 	[QPHY_START_CTRL]		= 0x08,
 	[QPHY_PCS_STATUS]		= 0x174,
+	[QPHY_PCS_POWER_DOWN_CONTROL]	= 0x04,
 };
 
 static const unsigned int sdm845_qmp_pciephy_regs_layout[QPHY_LAYOUT_SIZE] = {
 	[QPHY_SW_RESET]			= 0x00,
 	[QPHY_START_CTRL]		= 0x08,
 	[QPHY_PCS_STATUS]		= 0x174,
+	[QPHY_PCS_POWER_DOWN_CONTROL]	= 0x04,
 };
 
 static const unsigned int sdm845_qhp_pciephy_regs_layout[QPHY_LAYOUT_SIZE] = {
 	[QPHY_SW_RESET]			= 0x00,
 	[QPHY_START_CTRL]		= 0x08,
 	[QPHY_PCS_STATUS]		= 0x2ac,
+	[QPHY_PCS_POWER_DOWN_CONTROL]	= 0x04,
 };
 
 static const unsigned int sm8250_pcie_regs_layout[QPHY_LAYOUT_SIZE] = {
@@ -1999,13 +2002,8 @@ static int qmp_pcie_init(struct phy *phy)
 	if (ret)
 		goto err_assert_reset;
 
-	if (cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL])
-		qphy_setbits(pcs,
-				cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
-				cfg->pwrdn_ctrl);
-	else
-		qphy_setbits(pcs, QPHY_V2_PCS_POWER_DOWN_CONTROL,
-				cfg->pwrdn_ctrl);
+	qphy_setbits(pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
+			cfg->pwrdn_ctrl);
 
 	return 0;
 
@@ -2112,13 +2110,8 @@ static int qmp_pcie_power_off(struct phy *phy)
 	qphy_clrbits(qphy->pcs, cfg->regs[QPHY_START_CTRL], cfg->start_ctrl);
 
 	/* Put PHY into POWER DOWN state: active low */
-	if (cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL]) {
-		qphy_clrbits(qphy->pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
-			     cfg->pwrdn_ctrl);
-	} else {
-		qphy_clrbits(qphy->pcs, QPHY_V2_PCS_POWER_DOWN_CONTROL,
-				cfg->pwrdn_ctrl);
-	}
+	qphy_clrbits(qphy->pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
+			cfg->pwrdn_ctrl);
 
 	return 0;
 }
-- 
2.37.3

[PATCH v3 05/11] phy: qcom-qmp-pcie: move power-down update

[Johan Hovold]

Move the power-down-control register update that powers on the PHY to
the power-on handler so that it matches the power-off handler.

Note that the power-on handler is currently always called directly
after init.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-pcie.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
index 1105d439828c..b42c5e185228 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
@@ -1976,7 +1976,6 @@ static int qmp_pcie_init(struct phy *phy)
 	struct qmp_phy *qphy = phy_get_drvdata(phy);
 	struct qcom_qmp *qmp = qphy->qmp;
 	const struct qmp_phy_cfg *cfg = qphy->cfg;
-	void __iomem *pcs = qphy->pcs;
 	int ret;
 
 	/* turn on regulator supplies */
@@ -2002,9 +2001,6 @@ static int qmp_pcie_init(struct phy *phy)
 	if (ret)
 		goto err_assert_reset;
 
-	qphy_setbits(pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
-			cfg->pwrdn_ctrl);
-
 	return 0;
 
 err_assert_reset:
@@ -2041,6 +2037,9 @@ static int qmp_pcie_power_on(struct phy *phy)
 	unsigned int mask, val, ready;
 	int ret;
 
+	qphy_setbits(pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
+			cfg->pwrdn_ctrl);
+
 	if (qphy->mode == PHY_MODE_PCIE_RC)
 		mode_tables = cfg->tables_rc;
 	else
-- 
2.37.3

[PATCH v3 06/11] phy: qcom-qmp-pcie-msm8996: clean up power-down handling

[Johan Hovold]

This driver uses v2 registers only so drop the unnecessary
POWER_DOWN_CONTROL override.

Note that this register is already hard-coded when powering on the PHY.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-pcie-msm8996.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcie-msm8996.c b/drivers/phy/qualcomm/phy-qcom-qmp-pcie-msm8996.c
index 707ec81c7a2a..5fdd85a1dc3e 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-pcie-msm8996.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcie-msm8996.c
@@ -91,7 +91,6 @@ enum qphy_reg_layout {
 	QPHY_SW_RESET,
 	QPHY_START_CTRL,
 	QPHY_PCS_STATUS,
-	QPHY_PCS_POWER_DOWN_CONTROL,
 	/* Keep last to ensure regs_layout arrays are properly initialized */
 	QPHY_LAYOUT_SIZE
 };
@@ -591,13 +590,8 @@ static int qmp_pcie_msm8996_power_off(struct phy *phy)
 	qphy_clrbits(qphy->pcs, cfg->regs[QPHY_START_CTRL], cfg->start_ctrl);
 
 	/* Put PHY into POWER DOWN state: active low */
-	if (cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL]) {
-		qphy_clrbits(qphy->pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
-			     cfg->pwrdn_ctrl);
-	} else {
-		qphy_clrbits(qphy->pcs, QPHY_V2_PCS_POWER_DOWN_CONTROL,
-				cfg->pwrdn_ctrl);
-	}
+	qphy_clrbits(qphy->pcs, QPHY_V2_PCS_POWER_DOWN_CONTROL,
+			cfg->pwrdn_ctrl);
 
 	return 0;
 }
-- 
2.37.3

[PATCH v3 07/11] phy: qcom-qmp-combo: clean up power-down handling

[Johan Hovold]

Always define the POWER_DOWN_CONTROL register instead of falling back to
the v2 (and v3) offset during power on and power off.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 19 +++++--------------
 1 file changed, 5 insertions(+), 14 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
index c21512b9ab52..7b434e2ee640 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
@@ -121,6 +121,7 @@ static const unsigned int qmp_v3_usb3phy_regs_layout[QPHY_LAYOUT_SIZE] = {
 	[QPHY_SW_RESET]			= 0x00,
 	[QPHY_START_CTRL]		= 0x08,
 	[QPHY_PCS_STATUS]		= 0x174,
+	[QPHY_PCS_POWER_DOWN_CONTROL]	= 0x04,
 	[QPHY_PCS_AUTONOMOUS_MODE_CTRL]	= 0x0d8,
 	[QPHY_PCS_LFPS_RXTERM_IRQ_CLEAR]  = 0x0dc,
 	[QPHY_PCS_LFPS_RXTERM_IRQ_STATUS] = 0x170,
@@ -1991,13 +1992,8 @@ static int qmp_combo_com_init(struct qmp_phy *qphy)
 	qphy_clrbits(dp_com, QPHY_V3_DP_COM_SWI_CTRL, 0x03);
 	qphy_clrbits(dp_com, QPHY_V3_DP_COM_SW_RESET, SW_RESET);
 
-	if (cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL])
-		qphy_setbits(pcs,
-				cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
-				cfg->pwrdn_ctrl);
-	else
-		qphy_setbits(pcs, QPHY_V2_PCS_POWER_DOWN_CONTROL,
-				cfg->pwrdn_ctrl);
+	qphy_setbits(pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
+			cfg->pwrdn_ctrl);
 
 	mutex_unlock(&qmp->phy_mutex);
 
@@ -2144,13 +2140,8 @@ static int qmp_combo_power_off(struct phy *phy)
 		qphy_clrbits(qphy->pcs, cfg->regs[QPHY_START_CTRL], cfg->start_ctrl);
 
 		/* Put PHY into POWER DOWN state: active low */
-		if (cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL]) {
-			qphy_clrbits(qphy->pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
-				     cfg->pwrdn_ctrl);
-		} else {
-			qphy_clrbits(qphy->pcs, QPHY_V2_PCS_POWER_DOWN_CONTROL,
-					cfg->pwrdn_ctrl);
-		}
+		qphy_clrbits(qphy->pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
+				cfg->pwrdn_ctrl);
 	}
 
 	return 0;
-- 
2.37.3

[PATCH v3 08/11] phy: qcom-qmp-ufs: clean up power-down handling

[Johan Hovold]

Always define the POWER_DOWN_CONTROL register instead of falling back to
the v2 (and v4) offset during power on and power off.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-ufs.c | 22 ++++++++--------------
 1 file changed, 8 insertions(+), 14 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
index db5642e1f715..e28c45ab74ea 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
@@ -89,22 +89,26 @@ enum qphy_reg_layout {
 static const unsigned int msm8996_ufsphy_regs_layout[QPHY_LAYOUT_SIZE] = {
 	[QPHY_START_CTRL]		= 0x00,
 	[QPHY_PCS_READY_STATUS]		= 0x168,
+	[QPHY_PCS_POWER_DOWN_CONTROL]	= 0x04,
 };
 
 static const unsigned int sdm845_ufsphy_regs_layout[QPHY_LAYOUT_SIZE] = {
 	[QPHY_START_CTRL]		= 0x00,
 	[QPHY_PCS_READY_STATUS]		= 0x160,
+	[QPHY_PCS_POWER_DOWN_CONTROL]	= 0x04,
 };
 
 static const unsigned int sm6115_ufsphy_regs_layout[QPHY_LAYOUT_SIZE] = {
 	[QPHY_START_CTRL]		= 0x00,
 	[QPHY_PCS_READY_STATUS]		= 0x168,
+	[QPHY_PCS_POWER_DOWN_CONTROL]	= 0x04,
 };
 
 static const unsigned int sm8150_ufsphy_regs_layout[QPHY_LAYOUT_SIZE] = {
 	[QPHY_START_CTRL]		= QPHY_V4_PCS_UFS_PHY_START,
 	[QPHY_PCS_READY_STATUS]		= QPHY_V4_PCS_UFS_READY_STATUS,
 	[QPHY_SW_RESET]			= QPHY_V4_PCS_UFS_SW_RESET,
+	[QPHY_PCS_POWER_DOWN_CONTROL]	= QPHY_V4_PCS_UFS_POWER_DOWN_CONTROL,
 };
 
 static const struct qmp_phy_init_tbl msm8996_ufs_serdes_tbl[] = {
@@ -856,13 +860,8 @@ static int qmp_ufs_com_init(struct qmp_phy *qphy)
 	if (ret)
 		goto err_disable_regulators;
 
-	if (cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL])
-		qphy_setbits(pcs,
-			     cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
-			     cfg->pwrdn_ctrl);
-	else
-		qphy_setbits(pcs, QPHY_V2_PCS_POWER_DOWN_CONTROL,
-			     cfg->pwrdn_ctrl);
+	qphy_setbits(pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
+			cfg->pwrdn_ctrl);
 
 	return 0;
 
@@ -996,13 +995,8 @@ static int qmp_ufs_power_off(struct phy *phy)
 	qphy_clrbits(qphy->pcs, cfg->regs[QPHY_START_CTRL], cfg->start_ctrl);
 
 	/* Put PHY into POWER DOWN state: active low */
-	if (cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL]) {
-		qphy_clrbits(qphy->pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
-			     cfg->pwrdn_ctrl);
-	} else {
-		qphy_clrbits(qphy->pcs, QPHY_V2_PCS_POWER_DOWN_CONTROL,
-				cfg->pwrdn_ctrl);
-	}
+	qphy_clrbits(qphy->pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
+			cfg->pwrdn_ctrl);
 
 	return 0;
 }
-- 
2.37.3

[PATCH v3 09/11] phy: qcom-qmp-usb: clean up power-down handling

[Johan Hovold]

Always define the POWER_DOWN_CONTROL register instead of falling back to
the v2 (and v3) offset during power on and power off.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-usb.c | 20 ++++++--------------
 1 file changed, 6 insertions(+), 14 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-usb.c b/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
index 965e486ab87d..b0b13fb6cb59 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
@@ -126,6 +126,7 @@ static const unsigned int usb3phy_regs_layout[QPHY_LAYOUT_SIZE] = {
 	[QPHY_PCS_AUTONOMOUS_MODE_CTRL]	= 0x0d4,
 	[QPHY_PCS_LFPS_RXTERM_IRQ_CLEAR]  = 0x0d8,
 	[QPHY_PCS_LFPS_RXTERM_IRQ_STATUS] = 0x178,
+	[QPHY_PCS_POWER_DOWN_CONTROL]	= 0x04,
 };
 
 static const unsigned int qmp_v3_usb3phy_regs_layout[QPHY_LAYOUT_SIZE] = {
@@ -135,6 +136,7 @@ static const unsigned int qmp_v3_usb3phy_regs_layout[QPHY_LAYOUT_SIZE] = {
 	[QPHY_PCS_AUTONOMOUS_MODE_CTRL]	= 0x0d8,
 	[QPHY_PCS_LFPS_RXTERM_IRQ_CLEAR]  = 0x0dc,
 	[QPHY_PCS_LFPS_RXTERM_IRQ_STATUS] = 0x170,
+	[QPHY_PCS_POWER_DOWN_CONTROL]	= 0x04,
 };
 
 static const unsigned int qmp_v4_usb3phy_regs_layout[QPHY_LAYOUT_SIZE] = {
@@ -2164,13 +2166,8 @@ static int qmp_usb_init(struct phy *phy)
 		qphy_clrbits(dp_com, QPHY_V3_DP_COM_SW_RESET, SW_RESET);
 	}
 
-	if (cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL])
-		qphy_setbits(pcs,
-			     cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
-			     cfg->pwrdn_ctrl);
-	else
-		qphy_setbits(pcs, QPHY_V2_PCS_POWER_DOWN_CONTROL,
-			     cfg->pwrdn_ctrl);
+	qphy_setbits(pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
+			cfg->pwrdn_ctrl);
 
 	return 0;
 
@@ -2277,13 +2274,8 @@ static int qmp_usb_power_off(struct phy *phy)
 	qphy_clrbits(qphy->pcs, cfg->regs[QPHY_START_CTRL], cfg->start_ctrl);
 
 	/* Put PHY into POWER DOWN state: active low */
-	if (cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL]) {
-		qphy_clrbits(qphy->pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
-			     cfg->pwrdn_ctrl);
-	} else {
-		qphy_clrbits(qphy->pcs, QPHY_V2_PCS_POWER_DOWN_CONTROL,
-				cfg->pwrdn_ctrl);
-	}
+	qphy_clrbits(qphy->pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
+			cfg->pwrdn_ctrl);
 
 	return 0;
 }
-- 
2.37.3

[PATCH v3 10/11] phy: qcom-qmp-pcie: clean up clock lists

[Johan Hovold]

Keep the clock lists together and sorted by symbol name.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-pcie.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
index b42c5e185228..cb2128e5a78d 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
@@ -1462,6 +1462,10 @@ static inline void qphy_clrbits(void __iomem *base, u32 offset, u32 val)
 }
 
 /* list of clocks required by phy */
+static const char * const ipq8074_pciephy_clk_l[] = {
+	"aux", "cfg_ahb",
+};
+
 static const char * const msm8996_phy_clk_l[] = {
 	"aux", "cfg_ahb", "ref",
 };
@@ -1476,10 +1480,6 @@ static const char * const qmp_phy_vreg_l[] = {
 	"vdda-phy", "vdda-pll",
 };
 
-static const char * const ipq8074_pciephy_clk_l[] = {
-	"aux", "cfg_ahb",
-};
-
 /* list of resets */
 static const char * const ipq8074_pciephy_reset_l[] = {
 	"phy", "common",
-- 
2.37.3

[PATCH v3 11/11] phy: qcom-qmp-pcie: drop bogus register update

[Johan Hovold]

Since commit 0d58280cf1e6 ("phy: Update PHY power control sequence") the
PHY is powered on before configuring the registers and only the MSM8996
PCIe PHY, which includes the POWER_DOWN_CONTROL register in its PCS
initialisation table, may possibly require a second update afterwards.

To make things worse, the POWER_DOWN_CONTROL register lies at a
different offset on more recent SoCs so that the second update, which
still used a hard-coded offset, would write to an unrelated register
(e.g. a revision-id register on SC8280XP).

As the MSM8996 PCIe PHY is now handled by a separate driver, simply drop
the bogus register update.

Fixes: e4d8b05ad5f9 ("phy: qcom-qmp: Use proper PWRDOWN offset for sm8150 USB") added support
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> #RB3
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-pcie.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
index cb2128e5a78d..30838ae8f027 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
@@ -2061,12 +2061,6 @@ static int qmp_pcie_power_on(struct phy *phy)
 	qmp_pcie_pcs_init(qphy, &cfg->tables);
 	qmp_pcie_pcs_init(qphy, mode_tables);
 
-	/*
-	 * Pull out PHY from POWER DOWN state.
-	 * This is active low enable signal to power-down PHY.
-	 */
-	qphy_setbits(pcs, QPHY_V2_PCS_POWER_DOWN_CONTROL, cfg->pwrdn_ctrl);
-
 	if (cfg->has_pwrdn_delay)
 		usleep_range(cfg->pwrdn_delay_min, cfg->pwrdn_delay_max);
 
-- 
2.37.3

Re: [PATCH v3 00/11] phy: qcom-qmp: more fixes and cleanups (set 1)

[Vinod Koul]

On 17-10-22, 08:50, Johan Hovold wrote:
> Here's the next batch of QMP driver fixes and cleanups.
> 
> Dmitry suggested that the register layout structs could all be using
> per-IP version defines, which in principle sounds like a good idea. It
> is a separate change though, and one which would require some more work
> as it is not always clear which IP version a specific SoC uses (e.g.
> some of the IPQ platforms appear to mix and match currently).
> 
> As such a change shouldn't block these clean ups, I've dropped the
> merging of the IPQ SDM845 PCIe layout structs in v2.

Applied, thanks

-- 
~Vinod