[PATCH v7 0/3] Add QCOM SNPS PHY overriding params support

[PATCH v7 0/3] Add QCOM SNPS PHY overriding params support

[Krishna Kurapati]

Added support for overriding tuning parameters in QCOM SNPS PHY
from device tree. This parameter tuning is required to tune the
hs signal on dp/dm lines for electrical compliance to be successful.

changes in v7:
Fixed nitpick in driver code and dtsi file.

changes in v6:
Fixed errors in dt-bindings.
Fixed nitpick in driver code.

changes in v5:
Fixed nitpicks in code.
Added minimum and maximum for each parameter added in dt-bindings.
Added proper suffixes to each parameter as per dtschema.

changes in v4:
Fixed nitpicks in code.
Initial compliance test results showed overshoot in the middle of eye
diagram. The current dt values were put in place to correct it and fix
overshoot issue.

changes in v3:
Added support for phy tuning parameters to be represented in bps and
corresponding register values to be written are obtained by traversing
through data map declared in the driver.

changes in v2:
Reading the individual fields in each overriding register from
device tree.

Krishna Kurapati (2):
  phy: qcom-snps: Add support for overriding phy tuning parameters
  arm64: dts: qcom: sc7280: Update SNPS Phy params for SC7280 IDP device

Sandeep Maheswaram (1):
  dt-bindings: phy: qcom,usb-snps-femto-v2: Add phy override params
    bindings

 .../bindings/phy/qcom,usb-snps-femto-v2.yaml       |  96 ++++++++
 arch/arm64/boot/dts/qcom/sc7280-idp.dtsi           |   6 +
 drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c      | 268 ++++++++++++++++++++-
 3 files changed, 368 insertions(+), 2 deletions(-)

-- 
2.7.4

[PATCH v7 0/3] Add QCOM SNPS PHY overriding params support

[Krishna Kurapati]

Added support for overriding tuning parameters in QCOM SNPS PHY
from device tree. This parameter tuning is required to tune the
hs signal on dp/dm lines for electrical compliance to be successful.

changes in v7:
Fixed nitpick in driver code and dtsi file.

changes in v6:
Fixed errors in dt-bindings.
Fixed nitpick in driver code.

changes in v5:
Fixed nitpicks in code.
Added minimum and maximum for each parameter added in dt-bindings.
Added proper suffixes to each parameter as per dtschema.

changes in v4:
Fixed nitpicks in code.
Initial compliance test results showed overshoot in the middle of eye
diagram. The current dt values were put in place to correct it and fix
overshoot issue.

changes in v3:
Added support for phy tuning parameters to be represented in bps and
corresponding register values to be written are obtained by traversing
through data map declared in the driver.

changes in v2:
Reading the individual fields in each overriding register from
device tree.

Krishna Kurapati (2):
  phy: qcom-snps: Add support for overriding phy tuning parameters
  arm64: dts: qcom: sc7280: Update SNPS Phy params for SC7280 IDP device

Sandeep Maheswaram (1):
  dt-bindings: phy: qcom,usb-snps-femto-v2: Add phy override params
    bindings

 .../bindings/phy/qcom,usb-snps-femto-v2.yaml       |  96 ++++++++
 arch/arm64/boot/dts/qcom/sc7280-idp.dtsi           |   6 +
 drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c      | 268 ++++++++++++++++++++-
 3 files changed, 368 insertions(+), 2 deletions(-)

-- 
2.7.4


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[PATCH v7 1/3] dt-bindings: phy: qcom,usb-snps-femto-v2: Add phy override params bindings

[Krishna Kurapati]

From: Sandeep Maheswaram <quic_c_sanm@quicinc.com>

Add device tree bindings for SNPS phy tuning parameters.

Signed-off-by: Sandeep Maheswaram <quic_c_sanm@quicinc.com>
Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 .../bindings/phy/qcom,usb-snps-femto-v2.yaml       | 96 ++++++++++++++++++++++
 1 file changed, 96 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml b/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml
index 1ce251d..daeeb04 100644
--- a/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml
+++ b/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml
@@ -53,6 +53,102 @@ properties:
   vdda33-supply:
     description: phandle to the regulator 3.3V supply node.
 
+  qcom,hs-disconnect-bp:
+    description:
+      This adjusts the voltage level for the threshold used to
+      detect a disconnect event at the host. Possible values are.
+      The values defined are in multiples of basis points (1bp = 0.01%).
+      The hardware accepts only discrete values. The value closest to the
+      provided input will be chosen as the override value for this param.
+    minimum: -272
+    maximum: 2156
+
+  qcom,squelch-detector-bp:
+    description:
+      This adjusts the voltage level for the threshold used to
+      detect valid high-speed data.
+      The values defined are in multiples of basis points (1bp = 0.01%).
+      The hardware accepts only discrete values. The value closest to the
+      provided input will be chosen as the override value for this param.
+    minimum: -2090
+    maximum: 1590
+
+  qcom,hs-amplitude-bp:
+    description:
+      This adjusts the high-speed DC level voltage.
+      The values defined are in multiples of basis points (1bp = 0.01%).
+      The hardware accepts only discrete values. The value closest to the
+      provided input will be chosen as the override value for this param.
+    minimum: -660
+    maximum: 2670
+
+  qcom,pre-emphasis-duration-bp:
+    description:
+      This signal controls the duration for which the
+      HS pre-emphasis current is sourced onto DP<#> or DM<#>.
+      The HS Transmitter pre-emphasis duration is defined in terms of
+      unit amounts. One unit of pre-emphasis duration is approximately
+      650 ps and is defined as 1X pre-emphasis duration.
+      The values defined are in multiples of basis points (1bp = 0.01%).
+      The hardware accepts only discrete values. The value closest to the
+      provided input will be chosen as the override value for this param.
+    minimum: 10000
+    maximum: 20000
+
+  qcom,pre-emphasis-amplitude-bp:
+    description:
+      This signal controls the amount of current sourced to
+      DP<#> and DM<#> after a J-to-K or K-to-J transition.
+      The HS Transmitter pre-emphasis current is defined in terms of unit
+      amounts. One unit amount is approximately 2 mA and is defined as
+      1X pre-emphasis current.
+      The values defined are in multiples of basis points (1bp = 0.01%).
+      The hardware accepts only discrete values. The value closest to the
+      provided input will be chosen as the override value for this param.
+    minimum: 10000
+    maximum: 40000
+
+  qcom,hs-rise-fall-time-bp:
+    description:
+      This adjusts the rise/fall times of the high-speed waveform.
+      The values defined are in multiples of basis points (1bp = 0.01%).
+      The hardware accepts only discrete values. The value closest to the
+      provided input will be chosen as the override value for this param.
+    minimum: -4100
+    maximum: 5430
+
+  qcom,hs-crossover-voltage-microvolt:
+    description:
+      This adjusts the voltage at which the DP<#> and DM<#>
+      signals cross while transmitting in HS mode.
+      The values defined are in milli volts. The hardware accepts only
+      discrete values. The value closest to the provided input will be
+      chosen as the override value for this param.
+    minimum: -31000
+    maximum: 28000
+
+  qcom,hs-output-impedance-micro-ohms:
+    description:
+      In some applications, there can be significant series resistance
+      on the D+ and D- paths between the transceiver and cable. This adjusts
+      the driver source impedance to compensate for added series
+      resistance on the USB. The values defined are in milli ohms.
+      The hardware accepts only discrete values. The value closest to the
+      provided input will be chosen as the override value for this param.
+    minimum: -2300000
+    maximum: 6100000
+
+  qcom,ls-fs-output-impedance-bp:
+    description:
+      This adjusts the low- and full-speed single-ended source
+      impedance while driving high. The following adjustment values are based
+      on nominal process, voltage, and temperature.
+      The values defined are in multiples of basis points (1bp = 0.01%).
+      The hardware accepts only discrete values. The value closest to the
+      provided input will be chosen as the override value for this param.
+    minimum: -1053
+    maximum: 1310
+
 required:
   - compatible
   - reg
-- 
2.7.4

[PATCH v7 1/3] dt-bindings: phy: qcom,usb-snps-femto-v2: Add phy override params bindings

[Krishna Kurapati]

From: Sandeep Maheswaram <quic_c_sanm@quicinc.com>

Add device tree bindings for SNPS phy tuning parameters.

Signed-off-by: Sandeep Maheswaram <quic_c_sanm@quicinc.com>
Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 .../bindings/phy/qcom,usb-snps-femto-v2.yaml       | 96 ++++++++++++++++++++++
 1 file changed, 96 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml b/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml
index 1ce251d..daeeb04 100644
--- a/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml
+++ b/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml
@@ -53,6 +53,102 @@ properties:
   vdda33-supply:
     description: phandle to the regulator 3.3V supply node.
 
+  qcom,hs-disconnect-bp:
+    description:
+      This adjusts the voltage level for the threshold used to
+      detect a disconnect event at the host. Possible values are.
+      The values defined are in multiples of basis points (1bp = 0.01%).
+      The hardware accepts only discrete values. The value closest to the
+      provided input will be chosen as the override value for this param.
+    minimum: -272
+    maximum: 2156
+
+  qcom,squelch-detector-bp:
+    description:
+      This adjusts the voltage level for the threshold used to
+      detect valid high-speed data.
+      The values defined are in multiples of basis points (1bp = 0.01%).
+      The hardware accepts only discrete values. The value closest to the
+      provided input will be chosen as the override value for this param.
+    minimum: -2090
+    maximum: 1590
+
+  qcom,hs-amplitude-bp:
+    description:
+      This adjusts the high-speed DC level voltage.
+      The values defined are in multiples of basis points (1bp = 0.01%).
+      The hardware accepts only discrete values. The value closest to the
+      provided input will be chosen as the override value for this param.
+    minimum: -660
+    maximum: 2670
+
+  qcom,pre-emphasis-duration-bp:
+    description:
+      This signal controls the duration for which the
+      HS pre-emphasis current is sourced onto DP<#> or DM<#>.
+      The HS Transmitter pre-emphasis duration is defined in terms of
+      unit amounts. One unit of pre-emphasis duration is approximately
+      650 ps and is defined as 1X pre-emphasis duration.
+      The values defined are in multiples of basis points (1bp = 0.01%).
+      The hardware accepts only discrete values. The value closest to the
+      provided input will be chosen as the override value for this param.
+    minimum: 10000
+    maximum: 20000
+
+  qcom,pre-emphasis-amplitude-bp:
+    description:
+      This signal controls the amount of current sourced to
+      DP<#> and DM<#> after a J-to-K or K-to-J transition.
+      The HS Transmitter pre-emphasis current is defined in terms of unit
+      amounts. One unit amount is approximately 2 mA and is defined as
+      1X pre-emphasis current.
+      The values defined are in multiples of basis points (1bp = 0.01%).
+      The hardware accepts only discrete values. The value closest to the
+      provided input will be chosen as the override value for this param.
+    minimum: 10000
+    maximum: 40000
+
+  qcom,hs-rise-fall-time-bp:
+    description:
+      This adjusts the rise/fall times of the high-speed waveform.
+      The values defined are in multiples of basis points (1bp = 0.01%).
+      The hardware accepts only discrete values. The value closest to the
+      provided input will be chosen as the override value for this param.
+    minimum: -4100
+    maximum: 5430
+
+  qcom,hs-crossover-voltage-microvolt:
+    description:
+      This adjusts the voltage at which the DP<#> and DM<#>
+      signals cross while transmitting in HS mode.
+      The values defined are in milli volts. The hardware accepts only
+      discrete values. The value closest to the provided input will be
+      chosen as the override value for this param.
+    minimum: -31000
+    maximum: 28000
+
+  qcom,hs-output-impedance-micro-ohms:
+    description:
+      In some applications, there can be significant series resistance
+      on the D+ and D- paths between the transceiver and cable. This adjusts
+      the driver source impedance to compensate for added series
+      resistance on the USB. The values defined are in milli ohms.
+      The hardware accepts only discrete values. The value closest to the
+      provided input will be chosen as the override value for this param.
+    minimum: -2300000
+    maximum: 6100000
+
+  qcom,ls-fs-output-impedance-bp:
+    description:
+      This adjusts the low- and full-speed single-ended source
+      impedance while driving high. The following adjustment values are based
+      on nominal process, voltage, and temperature.
+      The values defined are in multiples of basis points (1bp = 0.01%).
+      The hardware accepts only discrete values. The value closest to the
+      provided input will be chosen as the override value for this param.
+    minimum: -1053
+    maximum: 1310
+
 required:
   - compatible
   - reg
-- 
2.7.4


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[PATCH v7 2/3] phy: qcom-snps: Add support for overriding phy tuning parameters

[Krishna Kurapati]

Add support for overriding electrical signal tuning parameters for
SNPS HS Phy.

Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
---
 drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c | 268 +++++++++++++++++++++++++-
 1 file changed, 266 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c b/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
index 5d20378..3a17216 100644
--- a/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
+++ b/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
@@ -52,6 +52,12 @@
 #define USB2_SUSPEND_N				BIT(2)
 #define USB2_SUSPEND_N_SEL			BIT(3)
 
+#define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X0		(0x6c)
+#define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X1		(0x70)
+#define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X2		(0x74)
+#define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X3		(0x78)
+#define PARAM_OVRD_MASK				0xFF
+
 #define USB2_PHY_USB_PHY_CFG0			(0x94)
 #define UTMI_PHY_DATAPATH_CTRL_OVERRIDE_EN	BIT(0)
 #define UTMI_PHY_CMN_CTRL_OVERRIDE_EN		BIT(1)
@@ -60,12 +66,76 @@
 #define REFCLK_SEL_MASK				GENMASK(1, 0)
 #define REFCLK_SEL_DEFAULT			(0x2 << 0)
 
+#define HS_DISCONNECT_MASK			GENMASK(2, 0)
+
+#define SQUELCH_DETECTOR_MASK			GENMASK(7, 5)
+
+#define HS_AMPLITUDE_MASK			GENMASK(3, 0)
+
+#define PREEMPHASIS_DURATION_MASK		BIT(5)
+
+#define PREEMPHASIS_AMPLITUDE_MASK		GENMASK(7, 6)
+
+#define HS_RISE_FALL_MASK			GENMASK(1, 0)
+
+#define HS_CROSSOVER_VOLTAGE_MASK		GENMASK(3, 2)
+
+#define HS_OUTPUT_IMPEDANCE_MASK		GENMASK(5, 4)
+
+#define LS_FS_OUTPUT_IMPEDANCE_MASK		GENMASK(3, 0)
+
+
 static const char * const qcom_snps_hsphy_vreg_names[] = {
 	"vdda-pll", "vdda33", "vdda18",
 };
 
 #define SNPS_HS_NUM_VREGS		ARRAY_SIZE(qcom_snps_hsphy_vreg_names)
 
+struct override_param {
+	s32	value;
+	u8	reg;
+};
+
+#define OVERRIDE_PARAM(bps, val)\
+{				\
+	.value = bps,		\
+	.reg = val,		\
+}
+
+struct override_param_map {
+	struct override_param *param_table;
+	u8 table_size;
+	u8 reg_offset;
+	u8 param_mask;
+};
+
+#define OVERRIDE_PARAM_MAP(table, num_elements, offset, mask)		\
+{									\
+	.param_table = table,						\
+	.table_size = num_elements,					\
+	.reg_offset = offset,						\
+	.param_mask = mask,						\
+}
+
+struct phy_override_seq {
+	bool	need_update;
+	u8	offset;
+	u8	value;
+	u8	mask;
+};
+
+static const char *phy_seq_props[] = {
+	"qcom,hs-disconnect-bp",
+	"qcom,squelch-detector-bp",
+	"qcom,hs-amplitude-bp",
+	"qcom,pre-emphasis-duration-bp",
+	"qcom,pre-emphasis-amplitude-bp",
+	"qcom,hs-rise-fall-time-bp",
+	"qcom,hs-crossover-voltage-microvolt",
+	"qcom,hs-output-impedance-micro-ohms",
+	"qcom,ls-fs-output-impedance-bp",
+};
+
 /**
  * struct qcom_snps_hsphy - snps hs phy attributes
  *
@@ -91,6 +161,7 @@ struct qcom_snps_hsphy {
 
 	bool phy_initialized;
 	enum phy_mode mode;
+	struct phy_override_seq update_seq_cfg[ARRAY_SIZE(phy_seq_props)];
 };
 
 static inline void qcom_snps_hsphy_write_mask(void __iomem *base, u32 offset,
@@ -173,10 +244,147 @@ static int qcom_snps_hsphy_set_mode(struct phy *phy, enum phy_mode mode,
 	return 0;
 }
 
+static struct override_param hs_disconnect_sc7280[] = {
+	OVERRIDE_PARAM(-272, 0),
+	OVERRIDE_PARAM(0, 1),
+	OVERRIDE_PARAM(317, 2),
+	OVERRIDE_PARAM(630, 3),
+	OVERRIDE_PARAM(973, 4),
+	OVERRIDE_PARAM(1332, 5),
+	OVERRIDE_PARAM(1743, 6),
+	OVERRIDE_PARAM(2156, 7),
+};
+
+static struct override_param squelch_det_threshold_sc7280[] = {
+	OVERRIDE_PARAM(-2090, 7),
+	OVERRIDE_PARAM(-1560, 6),
+	OVERRIDE_PARAM(-1030, 5),
+	OVERRIDE_PARAM(-530, 4),
+	OVERRIDE_PARAM(0, 3),
+	OVERRIDE_PARAM(530, 2),
+	OVERRIDE_PARAM(1060, 1),
+	OVERRIDE_PARAM(1590, 0),
+};
+
+static struct override_param hs_amplitude_sc7280[] = {
+	OVERRIDE_PARAM(-660, 0),
+	OVERRIDE_PARAM(-440, 1),
+	OVERRIDE_PARAM(-220, 2),
+	OVERRIDE_PARAM(0, 3),
+	OVERRIDE_PARAM(230, 4),
+	OVERRIDE_PARAM(440, 5),
+	OVERRIDE_PARAM(650, 6),
+	OVERRIDE_PARAM(890, 7),
+	OVERRIDE_PARAM(1110, 8),
+	OVERRIDE_PARAM(1330, 9),
+	OVERRIDE_PARAM(1560, 10),
+	OVERRIDE_PARAM(1780, 11),
+	OVERRIDE_PARAM(2000, 12),
+	OVERRIDE_PARAM(2220, 13),
+	OVERRIDE_PARAM(2430, 14),
+	OVERRIDE_PARAM(2670, 15),
+};
+
+static struct override_param preemphasis_duration_sc7280[] = {
+	OVERRIDE_PARAM(10000, 1),
+	OVERRIDE_PARAM(20000, 0),
+};
+
+static struct override_param preemphasis_amplitude_sc7280[] = {
+	OVERRIDE_PARAM(10000, 1),
+	OVERRIDE_PARAM(20000, 2),
+	OVERRIDE_PARAM(30000, 3),
+	OVERRIDE_PARAM(40000, 0),
+};
+
+static struct override_param hs_rise_fall_time_sc7280[] = {
+	OVERRIDE_PARAM(-4100, 3),
+	OVERRIDE_PARAM(0, 2),
+	OVERRIDE_PARAM(2810, 1),
+	OVERRIDE_PARAM(5430, 0),
+};
+
+static struct override_param hs_crossover_voltage_sc7280[] = {
+	OVERRIDE_PARAM(-31000, 1),
+	OVERRIDE_PARAM(0, 3),
+	OVERRIDE_PARAM(28000, 2),
+};
+
+static struct override_param hs_output_impedance_sc7280[] = {
+	OVERRIDE_PARAM(-2300000, 3),
+	OVERRIDE_PARAM(0, 2),
+	OVERRIDE_PARAM(2600000, 1),
+	OVERRIDE_PARAM(6100000, 0),
+};
+
+static struct override_param ls_fs_output_impedance_sc7280[] = {
+	OVERRIDE_PARAM(-1053, 15),
+	OVERRIDE_PARAM(-557, 7),
+	OVERRIDE_PARAM(0, 3),
+	OVERRIDE_PARAM(612, 1),
+	OVERRIDE_PARAM(1310, 0),
+};
+
+struct override_param_map sc7280_idp[] = {
+	OVERRIDE_PARAM_MAP(
+			hs_disconnect_sc7280,
+			ARRAY_SIZE(hs_disconnect_sc7280),
+			USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X0,
+			HS_DISCONNECT_MASK),
+
+	OVERRIDE_PARAM_MAP(
+			squelch_det_threshold_sc7280,
+			ARRAY_SIZE(squelch_det_threshold_sc7280),
+			USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X0,
+			SQUELCH_DETECTOR_MASK),
+
+	OVERRIDE_PARAM_MAP(
+			hs_amplitude_sc7280,
+			ARRAY_SIZE(hs_amplitude_sc7280),
+			USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X1,
+			HS_AMPLITUDE_MASK),
+
+	OVERRIDE_PARAM_MAP(
+			preemphasis_duration_sc7280,
+			ARRAY_SIZE(preemphasis_duration_sc7280),
+			USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X1,
+			PREEMPHASIS_DURATION_MASK),
+
+	OVERRIDE_PARAM_MAP(
+			preemphasis_amplitude_sc7280,
+			ARRAY_SIZE(preemphasis_amplitude_sc7280),
+			USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X1,
+			PREEMPHASIS_AMPLITUDE_MASK),
+
+	OVERRIDE_PARAM_MAP(
+			hs_rise_fall_time_sc7280,
+			ARRAY_SIZE(hs_rise_fall_time_sc7280),
+			USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X2,
+			HS_RISE_FALL_MASK),
+
+	OVERRIDE_PARAM_MAP(
+			hs_crossover_voltage_sc7280,
+			ARRAY_SIZE(hs_crossover_voltage_sc7280),
+			USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X2,
+			HS_CROSSOVER_VOLTAGE_MASK),
+
+	OVERRIDE_PARAM_MAP(
+			hs_output_impedance_sc7280,
+			ARRAY_SIZE(hs_output_impedance_sc7280),
+			USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X2,
+			HS_OUTPUT_IMPEDANCE_MASK),
+
+	OVERRIDE_PARAM_MAP(
+			ls_fs_output_impedance_sc7280,
+			ARRAY_SIZE(ls_fs_output_impedance_sc7280),
+			USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X3,
+			LS_FS_OUTPUT_IMPEDANCE_MASK),
+};
+
 static int qcom_snps_hsphy_init(struct phy *phy)
 {
 	struct qcom_snps_hsphy *hsphy = phy_get_drvdata(phy);
-	int ret;
+	int ret, i;
 
 	dev_vdbg(&phy->dev, "%s(): Initializing SNPS HS phy\n", __func__);
 
@@ -223,6 +431,14 @@ static int qcom_snps_hsphy_init(struct phy *phy)
 	qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_CTRL1,
 					VBUSVLDEXT0, VBUSVLDEXT0);
 
+	for (i = 0; i < ARRAY_SIZE(hsphy->update_seq_cfg); i++) {
+		if (hsphy->update_seq_cfg[i].need_update)
+			qcom_snps_hsphy_write_mask(hsphy->base,
+					hsphy->update_seq_cfg[i].offset,
+					hsphy->update_seq_cfg[i].mask,
+					hsphy->update_seq_cfg[i].value);
+	}
+
 	qcom_snps_hsphy_write_mask(hsphy->base,
 					USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON2,
 					VREGBYPASS, VREGBYPASS);
@@ -280,7 +496,10 @@ static const struct phy_ops qcom_snps_hsphy_gen_ops = {
 static const struct of_device_id qcom_snps_hsphy_of_match_table[] = {
 	{ .compatible	= "qcom,sm8150-usb-hs-phy", },
 	{ .compatible	= "qcom,usb-snps-hs-5nm-phy", },
-	{ .compatible	= "qcom,usb-snps-hs-7nm-phy", },
+	{
+		.compatible	= "qcom,usb-snps-hs-7nm-phy",
+		.data		= &sc7280_idp,
+	},
 	{ .compatible	= "qcom,usb-snps-femto-v2-phy",	},
 	{ }
 };
@@ -291,6 +510,50 @@ static const struct dev_pm_ops qcom_snps_hsphy_pm_ops = {
 			   qcom_snps_hsphy_runtime_resume, NULL)
 };
 
+static void qcom_snps_hsphy_override_param_update_val(
+			const struct override_param_map map,
+			s32 dt_val, struct phy_override_seq *seq_entry)
+{
+	int i;
+
+	/*
+	 * Param table for each param is in increasing order
+	 * of dt values. We need to iterate over the list to
+	 * select the entry that has equal or the next highest value.
+	 */
+	for (i = 0; i < map.table_size - 1; i++) {
+		if (map.param_table[i].value >= dt_val)
+			break;
+	}
+
+	seq_entry->need_update = true;
+	seq_entry->offset = map.reg_offset;
+	seq_entry->mask = map.param_mask;
+	seq_entry->value =  map.param_table[i].reg << __ffs(map.param_mask);
+}
+
+static void qcom_snps_hsphy_read_override_param_seq(struct device *dev)
+{
+	struct device_node *node = dev->of_node;
+	s32 val;
+	int ret, i;
+	struct qcom_snps_hsphy *hsphy;
+	const struct override_param_map *cfg =
+		(struct override_param_map *) of_device_get_match_data(dev);
+
+	hsphy = dev_get_drvdata(dev);
+
+	for (i = 0; i < ARRAY_SIZE(phy_seq_props); i++) {
+		ret = of_property_read_s32(node, phy_seq_props[i], &val);
+		if (!ret) {
+			dev_dbg(&hsphy->phy->dev, "Read param: %s val: %d\n",
+						phy_seq_props[i], val);
+			qcom_snps_hsphy_override_param_update_val(cfg[i], val,
+						&hsphy->update_seq_cfg[i]);
+		}
+	}
+}
+
 static int qcom_snps_hsphy_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -352,6 +615,7 @@ static int qcom_snps_hsphy_probe(struct platform_device *pdev)
 
 	dev_set_drvdata(dev, hsphy);
 	phy_set_drvdata(generic_phy, hsphy);
+	qcom_snps_hsphy_read_override_param_seq(dev);
 
 	phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
 	if (!IS_ERR(phy_provider))
-- 
2.7.4

[PATCH v7 2/3] phy: qcom-snps: Add support for overriding phy tuning parameters

[Krishna Kurapati]

Add support for overriding electrical signal tuning parameters for
SNPS HS Phy.

Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
---
 drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c | 268 +++++++++++++++++++++++++-
 1 file changed, 266 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c b/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
index 5d20378..3a17216 100644
--- a/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
+++ b/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
@@ -52,6 +52,12 @@
 #define USB2_SUSPEND_N				BIT(2)
 #define USB2_SUSPEND_N_SEL			BIT(3)
 
+#define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X0		(0x6c)
+#define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X1		(0x70)
+#define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X2		(0x74)
+#define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X3		(0x78)
+#define PARAM_OVRD_MASK				0xFF
+
 #define USB2_PHY_USB_PHY_CFG0			(0x94)
 #define UTMI_PHY_DATAPATH_CTRL_OVERRIDE_EN	BIT(0)
 #define UTMI_PHY_CMN_CTRL_OVERRIDE_EN		BIT(1)
@@ -60,12 +66,76 @@
 #define REFCLK_SEL_MASK				GENMASK(1, 0)
 #define REFCLK_SEL_DEFAULT			(0x2 << 0)
 
+#define HS_DISCONNECT_MASK			GENMASK(2, 0)
+
+#define SQUELCH_DETECTOR_MASK			GENMASK(7, 5)
+
+#define HS_AMPLITUDE_MASK			GENMASK(3, 0)
+
+#define PREEMPHASIS_DURATION_MASK		BIT(5)
+
+#define PREEMPHASIS_AMPLITUDE_MASK		GENMASK(7, 6)
+
+#define HS_RISE_FALL_MASK			GENMASK(1, 0)
+
+#define HS_CROSSOVER_VOLTAGE_MASK		GENMASK(3, 2)
+
+#define HS_OUTPUT_IMPEDANCE_MASK		GENMASK(5, 4)
+
+#define LS_FS_OUTPUT_IMPEDANCE_MASK		GENMASK(3, 0)
+
+
 static const char * const qcom_snps_hsphy_vreg_names[] = {
 	"vdda-pll", "vdda33", "vdda18",
 };
 
 #define SNPS_HS_NUM_VREGS		ARRAY_SIZE(qcom_snps_hsphy_vreg_names)
 
+struct override_param {
+	s32	value;
+	u8	reg;
+};
+
+#define OVERRIDE_PARAM(bps, val)\
+{				\
+	.value = bps,		\
+	.reg = val,		\
+}
+
+struct override_param_map {
+	struct override_param *param_table;
+	u8 table_size;
+	u8 reg_offset;
+	u8 param_mask;
+};
+
+#define OVERRIDE_PARAM_MAP(table, num_elements, offset, mask)		\
+{									\
+	.param_table = table,						\
+	.table_size = num_elements,					\
+	.reg_offset = offset,						\
+	.param_mask = mask,						\
+}
+
+struct phy_override_seq {
+	bool	need_update;
+	u8	offset;
+	u8	value;
+	u8	mask;
+};
+
+static const char *phy_seq_props[] = {
+	"qcom,hs-disconnect-bp",
+	"qcom,squelch-detector-bp",
+	"qcom,hs-amplitude-bp",
+	"qcom,pre-emphasis-duration-bp",
+	"qcom,pre-emphasis-amplitude-bp",
+	"qcom,hs-rise-fall-time-bp",
+	"qcom,hs-crossover-voltage-microvolt",
+	"qcom,hs-output-impedance-micro-ohms",
+	"qcom,ls-fs-output-impedance-bp",
+};
+
 /**
  * struct qcom_snps_hsphy - snps hs phy attributes
  *
@@ -91,6 +161,7 @@ struct qcom_snps_hsphy {
 
 	bool phy_initialized;
 	enum phy_mode mode;
+	struct phy_override_seq update_seq_cfg[ARRAY_SIZE(phy_seq_props)];
 };
 
 static inline void qcom_snps_hsphy_write_mask(void __iomem *base, u32 offset,
@@ -173,10 +244,147 @@ static int qcom_snps_hsphy_set_mode(struct phy *phy, enum phy_mode mode,
 	return 0;
 }
 
+static struct override_param hs_disconnect_sc7280[] = {
+	OVERRIDE_PARAM(-272, 0),
+	OVERRIDE_PARAM(0, 1),
+	OVERRIDE_PARAM(317, 2),
+	OVERRIDE_PARAM(630, 3),
+	OVERRIDE_PARAM(973, 4),
+	OVERRIDE_PARAM(1332, 5),
+	OVERRIDE_PARAM(1743, 6),
+	OVERRIDE_PARAM(2156, 7),
+};
+
+static struct override_param squelch_det_threshold_sc7280[] = {
+	OVERRIDE_PARAM(-2090, 7),
+	OVERRIDE_PARAM(-1560, 6),
+	OVERRIDE_PARAM(-1030, 5),
+	OVERRIDE_PARAM(-530, 4),
+	OVERRIDE_PARAM(0, 3),
+	OVERRIDE_PARAM(530, 2),
+	OVERRIDE_PARAM(1060, 1),
+	OVERRIDE_PARAM(1590, 0),
+};
+
+static struct override_param hs_amplitude_sc7280[] = {
+	OVERRIDE_PARAM(-660, 0),
+	OVERRIDE_PARAM(-440, 1),
+	OVERRIDE_PARAM(-220, 2),
+	OVERRIDE_PARAM(0, 3),
+	OVERRIDE_PARAM(230, 4),
+	OVERRIDE_PARAM(440, 5),
+	OVERRIDE_PARAM(650, 6),
+	OVERRIDE_PARAM(890, 7),
+	OVERRIDE_PARAM(1110, 8),
+	OVERRIDE_PARAM(1330, 9),
+	OVERRIDE_PARAM(1560, 10),
+	OVERRIDE_PARAM(1780, 11),
+	OVERRIDE_PARAM(2000, 12),
+	OVERRIDE_PARAM(2220, 13),
+	OVERRIDE_PARAM(2430, 14),
+	OVERRIDE_PARAM(2670, 15),
+};
+
+static struct override_param preemphasis_duration_sc7280[] = {
+	OVERRIDE_PARAM(10000, 1),
+	OVERRIDE_PARAM(20000, 0),
+};
+
+static struct override_param preemphasis_amplitude_sc7280[] = {
+	OVERRIDE_PARAM(10000, 1),
+	OVERRIDE_PARAM(20000, 2),
+	OVERRIDE_PARAM(30000, 3),
+	OVERRIDE_PARAM(40000, 0),
+};
+
+static struct override_param hs_rise_fall_time_sc7280[] = {
+	OVERRIDE_PARAM(-4100, 3),
+	OVERRIDE_PARAM(0, 2),
+	OVERRIDE_PARAM(2810, 1),
+	OVERRIDE_PARAM(5430, 0),
+};
+
+static struct override_param hs_crossover_voltage_sc7280[] = {
+	OVERRIDE_PARAM(-31000, 1),
+	OVERRIDE_PARAM(0, 3),
+	OVERRIDE_PARAM(28000, 2),
+};
+
+static struct override_param hs_output_impedance_sc7280[] = {
+	OVERRIDE_PARAM(-2300000, 3),
+	OVERRIDE_PARAM(0, 2),
+	OVERRIDE_PARAM(2600000, 1),
+	OVERRIDE_PARAM(6100000, 0),
+};
+
+static struct override_param ls_fs_output_impedance_sc7280[] = {
+	OVERRIDE_PARAM(-1053, 15),
+	OVERRIDE_PARAM(-557, 7),
+	OVERRIDE_PARAM(0, 3),
+	OVERRIDE_PARAM(612, 1),
+	OVERRIDE_PARAM(1310, 0),
+};
+
+struct override_param_map sc7280_idp[] = {
+	OVERRIDE_PARAM_MAP(
+			hs_disconnect_sc7280,
+			ARRAY_SIZE(hs_disconnect_sc7280),
+			USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X0,
+			HS_DISCONNECT_MASK),
+
+	OVERRIDE_PARAM_MAP(
+			squelch_det_threshold_sc7280,
+			ARRAY_SIZE(squelch_det_threshold_sc7280),
+			USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X0,
+			SQUELCH_DETECTOR_MASK),
+
+	OVERRIDE_PARAM_MAP(
+			hs_amplitude_sc7280,
+			ARRAY_SIZE(hs_amplitude_sc7280),
+			USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X1,
+			HS_AMPLITUDE_MASK),
+
+	OVERRIDE_PARAM_MAP(
+			preemphasis_duration_sc7280,
+			ARRAY_SIZE(preemphasis_duration_sc7280),
+			USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X1,
+			PREEMPHASIS_DURATION_MASK),
+
+	OVERRIDE_PARAM_MAP(
+			preemphasis_amplitude_sc7280,
+			ARRAY_SIZE(preemphasis_amplitude_sc7280),
+			USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X1,
+			PREEMPHASIS_AMPLITUDE_MASK),
+
+	OVERRIDE_PARAM_MAP(
+			hs_rise_fall_time_sc7280,
+			ARRAY_SIZE(hs_rise_fall_time_sc7280),
+			USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X2,
+			HS_RISE_FALL_MASK),
+
+	OVERRIDE_PARAM_MAP(
+			hs_crossover_voltage_sc7280,
+			ARRAY_SIZE(hs_crossover_voltage_sc7280),
+			USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X2,
+			HS_CROSSOVER_VOLTAGE_MASK),
+
+	OVERRIDE_PARAM_MAP(
+			hs_output_impedance_sc7280,
+			ARRAY_SIZE(hs_output_impedance_sc7280),
+			USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X2,
+			HS_OUTPUT_IMPEDANCE_MASK),
+
+	OVERRIDE_PARAM_MAP(
+			ls_fs_output_impedance_sc7280,
+			ARRAY_SIZE(ls_fs_output_impedance_sc7280),
+			USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X3,
+			LS_FS_OUTPUT_IMPEDANCE_MASK),
+};
+
 static int qcom_snps_hsphy_init(struct phy *phy)
 {
 	struct qcom_snps_hsphy *hsphy = phy_get_drvdata(phy);
-	int ret;
+	int ret, i;
 
 	dev_vdbg(&phy->dev, "%s(): Initializing SNPS HS phy\n", __func__);
 
@@ -223,6 +431,14 @@ static int qcom_snps_hsphy_init(struct phy *phy)
 	qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_CTRL1,
 					VBUSVLDEXT0, VBUSVLDEXT0);
 
+	for (i = 0; i < ARRAY_SIZE(hsphy->update_seq_cfg); i++) {
+		if (hsphy->update_seq_cfg[i].need_update)
+			qcom_snps_hsphy_write_mask(hsphy->base,
+					hsphy->update_seq_cfg[i].offset,
+					hsphy->update_seq_cfg[i].mask,
+					hsphy->update_seq_cfg[i].value);
+	}
+
 	qcom_snps_hsphy_write_mask(hsphy->base,
 					USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON2,
 					VREGBYPASS, VREGBYPASS);
@@ -280,7 +496,10 @@ static const struct phy_ops qcom_snps_hsphy_gen_ops = {
 static const struct of_device_id qcom_snps_hsphy_of_match_table[] = {
 	{ .compatible	= "qcom,sm8150-usb-hs-phy", },
 	{ .compatible	= "qcom,usb-snps-hs-5nm-phy", },
-	{ .compatible	= "qcom,usb-snps-hs-7nm-phy", },
+	{
+		.compatible	= "qcom,usb-snps-hs-7nm-phy",
+		.data		= &sc7280_idp,
+	},
 	{ .compatible	= "qcom,usb-snps-femto-v2-phy",	},
 	{ }
 };
@@ -291,6 +510,50 @@ static const struct dev_pm_ops qcom_snps_hsphy_pm_ops = {
 			   qcom_snps_hsphy_runtime_resume, NULL)
 };
 
+static void qcom_snps_hsphy_override_param_update_val(
+			const struct override_param_map map,
+			s32 dt_val, struct phy_override_seq *seq_entry)
+{
+	int i;
+
+	/*
+	 * Param table for each param is in increasing order
+	 * of dt values. We need to iterate over the list to
+	 * select the entry that has equal or the next highest value.
+	 */
+	for (i = 0; i < map.table_size - 1; i++) {
+		if (map.param_table[i].value >= dt_val)
+			break;
+	}
+
+	seq_entry->need_update = true;
+	seq_entry->offset = map.reg_offset;
+	seq_entry->mask = map.param_mask;
+	seq_entry->value =  map.param_table[i].reg << __ffs(map.param_mask);
+}
+
+static void qcom_snps_hsphy_read_override_param_seq(struct device *dev)
+{
+	struct device_node *node = dev->of_node;
+	s32 val;
+	int ret, i;
+	struct qcom_snps_hsphy *hsphy;
+	const struct override_param_map *cfg =
+		(struct override_param_map *) of_device_get_match_data(dev);
+
+	hsphy = dev_get_drvdata(dev);
+
+	for (i = 0; i < ARRAY_SIZE(phy_seq_props); i++) {
+		ret = of_property_read_s32(node, phy_seq_props[i], &val);
+		if (!ret) {
+			dev_dbg(&hsphy->phy->dev, "Read param: %s val: %d\n",
+						phy_seq_props[i], val);
+			qcom_snps_hsphy_override_param_update_val(cfg[i], val,
+						&hsphy->update_seq_cfg[i]);
+		}
+	}
+}
+
 static int qcom_snps_hsphy_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -352,6 +615,7 @@ static int qcom_snps_hsphy_probe(struct platform_device *pdev)
 
 	dev_set_drvdata(dev, hsphy);
 	phy_set_drvdata(generic_phy, hsphy);
+	qcom_snps_hsphy_read_override_param_seq(dev);
 
 	phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
 	if (!IS_ERR(phy_provider))
-- 
2.7.4


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[PATCH v7 3/3] arm64: dts: qcom: sc7280: Update SNPS Phy params for SC7280 IDP device

[Krishna Kurapati]

Overriding the SNPS Phy tuning parameters for SC7280 IDP device.

Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
---
 arch/arm64/boot/dts/qcom/sc7280-idp.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
index ecbf2b8..589258a 100644
--- a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
@@ -317,6 +317,12 @@
 	vdda-pll-supply = <&vreg_l10c_0p8>;
 	vdda33-supply = <&vreg_l2b_3p0>;
 	vdda18-supply = <&vreg_l1c_1p8>;
+	qcom,hs-rise-fall-time-bp = <0>;
+	qcom,squelch-detector-bp = <(-2090)>;
+	qcom,hs-disconnect-bp = <1743>;
+	qcom,hs-amplitude-bp = <1780>;
+	qcom,hs-crossover-voltage-microvolt = <(-31000)>;
+	qcom,hs-output-impedance-micro-ohms = <2600000>;
 };
 
 &usb_1_qmpphy {
-- 
2.7.4

[PATCH v7 3/3] arm64: dts: qcom: sc7280: Update SNPS Phy params for SC7280 IDP device

[Krishna Kurapati]

Overriding the SNPS Phy tuning parameters for SC7280 IDP device.

Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
---
 arch/arm64/boot/dts/qcom/sc7280-idp.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
index ecbf2b8..589258a 100644
--- a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
@@ -317,6 +317,12 @@
 	vdda-pll-supply = <&vreg_l10c_0p8>;
 	vdda33-supply = <&vreg_l2b_3p0>;
 	vdda18-supply = <&vreg_l1c_1p8>;
+	qcom,hs-rise-fall-time-bp = <0>;
+	qcom,squelch-detector-bp = <(-2090)>;
+	qcom,hs-disconnect-bp = <1743>;
+	qcom,hs-amplitude-bp = <1780>;
+	qcom,hs-crossover-voltage-microvolt = <(-31000)>;
+	qcom,hs-output-impedance-micro-ohms = <2600000>;
 };
 
 &usb_1_qmpphy {
-- 
2.7.4


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Re: [PATCH v7 1/3] dt-bindings: phy: qcom,usb-snps-femto-v2: Add phy override params bindings

[Rob Herring]

On Tue, 31 May 2022 21:44:51 +0530, Krishna Kurapati wrote:
> From: Sandeep Maheswaram <quic_c_sanm@quicinc.com>
> 
> Add device tree bindings for SNPS phy tuning parameters.
> 
> Signed-off-by: Sandeep Maheswaram <quic_c_sanm@quicinc.com>
> Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> ---
>  .../bindings/phy/qcom,usb-snps-femto-v2.yaml       | 96 ++++++++++++++++++++++
>  1 file changed, 96 insertions(+)
> 

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,squelch-detector-bp: 'oneOf' conditional failed, one must be fixed:
	'type' is a required property
		hint: A vendor boolean property can use "type: boolean"
	Additional properties are not allowed ('maximum', 'minimum' were unexpected)
		hint: A vendor boolean property can use "type: boolean"
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,squelch-detector-bp: 'oneOf' conditional failed, one must be fixed:
		'enum' is a required property
		'const' is a required property
		hint: A vendor string property with exact values has an implicit type
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,squelch-detector-bp: 'oneOf' conditional failed, one must be fixed:
		'$ref' is a required property
		'allOf' is a required property
		hint: A vendor property needs a $ref to types.yaml
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	hint: Vendor specific properties must have a type and description unless they have a defined, common suffix.
	from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,ls-fs-output-impedance-bp: 'oneOf' conditional failed, one must be fixed:
	'type' is a required property
		hint: A vendor boolean property can use "type: boolean"
	Additional properties are not allowed ('maximum', 'minimum' were unexpected)
		hint: A vendor boolean property can use "type: boolean"
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,ls-fs-output-impedance-bp: 'oneOf' conditional failed, one must be fixed:
		'enum' is a required property
		'const' is a required property
		hint: A vendor string property with exact values has an implicit type
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,ls-fs-output-impedance-bp: 'oneOf' conditional failed, one must be fixed:
		'$ref' is a required property
		'allOf' is a required property
		hint: A vendor property needs a $ref to types.yaml
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	hint: Vendor specific properties must have a type and description unless they have a defined, common suffix.
	from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,hs-amplitude-bp: 'oneOf' conditional failed, one must be fixed:
	'type' is a required property
		hint: A vendor boolean property can use "type: boolean"
	Additional properties are not allowed ('maximum', 'minimum' were unexpected)
		hint: A vendor boolean property can use "type: boolean"
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,hs-amplitude-bp: 'oneOf' conditional failed, one must be fixed:
		'enum' is a required property
		'const' is a required property
		hint: A vendor string property with exact values has an implicit type
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,hs-amplitude-bp: 'oneOf' conditional failed, one must be fixed:
		'$ref' is a required property
		'allOf' is a required property
		hint: A vendor property needs a $ref to types.yaml
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	hint: Vendor specific properties must have a type and description unless they have a defined, common suffix.
	from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,pre-emphasis-duration-bp: 'oneOf' conditional failed, one must be fixed:
	'type' is a required property
		hint: A vendor boolean property can use "type: boolean"
	Additional properties are not allowed ('maximum', 'minimum' were unexpected)
		hint: A vendor boolean property can use "type: boolean"
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,pre-emphasis-duration-bp: 'oneOf' conditional failed, one must be fixed:
		'enum' is a required property
		'const' is a required property
		hint: A vendor string property with exact values has an implicit type
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,pre-emphasis-duration-bp: 'oneOf' conditional failed, one must be fixed:
		'$ref' is a required property
		'allOf' is a required property
		hint: A vendor property needs a $ref to types.yaml
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	hint: Vendor specific properties must have a type and description unless they have a defined, common suffix.
	from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,pre-emphasis-amplitude-bp: 'oneOf' conditional failed, one must be fixed:
	'type' is a required property
		hint: A vendor boolean property can use "type: boolean"
	Additional properties are not allowed ('maximum', 'minimum' were unexpected)
		hint: A vendor boolean property can use "type: boolean"
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,pre-emphasis-amplitude-bp: 'oneOf' conditional failed, one must be fixed:
		'enum' is a required property
		'const' is a required property
		hint: A vendor string property with exact values has an implicit type
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,pre-emphasis-amplitude-bp: 'oneOf' conditional failed, one must be fixed:
		'$ref' is a required property
		'allOf' is a required property
		hint: A vendor property needs a $ref to types.yaml
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	hint: Vendor specific properties must have a type and description unless they have a defined, common suffix.
	from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,hs-disconnect-bp: 'oneOf' conditional failed, one must be fixed:
	'type' is a required property
		hint: A vendor boolean property can use "type: boolean"
	Additional properties are not allowed ('maximum', 'minimum' were unexpected)
		hint: A vendor boolean property can use "type: boolean"
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,hs-disconnect-bp: 'oneOf' conditional failed, one must be fixed:
		'enum' is a required property
		'const' is a required property
		hint: A vendor string property with exact values has an implicit type
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,hs-disconnect-bp: 'oneOf' conditional failed, one must be fixed:
		'$ref' is a required property
		'allOf' is a required property
		hint: A vendor property needs a $ref to types.yaml
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	hint: Vendor specific properties must have a type and description unless they have a defined, common suffix.
	from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,hs-rise-fall-time-bp: 'oneOf' conditional failed, one must be fixed:
	'type' is a required property
		hint: A vendor boolean property can use "type: boolean"
	Additional properties are not allowed ('maximum', 'minimum' were unexpected)
		hint: A vendor boolean property can use "type: boolean"
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,hs-rise-fall-time-bp: 'oneOf' conditional failed, one must be fixed:
		'enum' is a required property
		'const' is a required property
		hint: A vendor string property with exact values has an implicit type
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,hs-rise-fall-time-bp: 'oneOf' conditional failed, one must be fixed:
		'$ref' is a required property
		'allOf' is a required property
		hint: A vendor property needs a $ref to types.yaml
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	hint: Vendor specific properties must have a type and description unless they have a defined, common suffix.
	from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: ignoring, error in schema: properties: qcom,hs-rise-fall-time-bp
Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.example.dtb:0:0: /example-0/phy@88e2000: failed to match any schema with compatible: ['qcom,sm8150-usb-hs-phy']

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/patch/

This check can fail if there are any dependencies. The base for a patch
series is generally the most recent rc1.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit.

Re: [PATCH v7 1/3] dt-bindings: phy: qcom,usb-snps-femto-v2: Add phy override params bindings

[Rob Herring]

On Tue, 31 May 2022 21:44:51 +0530, Krishna Kurapati wrote:
> From: Sandeep Maheswaram <quic_c_sanm@quicinc.com>
> 
> Add device tree bindings for SNPS phy tuning parameters.
> 
> Signed-off-by: Sandeep Maheswaram <quic_c_sanm@quicinc.com>
> Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> ---
>  .../bindings/phy/qcom,usb-snps-femto-v2.yaml       | 96 ++++++++++++++++++++++
>  1 file changed, 96 insertions(+)
> 

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,squelch-detector-bp: 'oneOf' conditional failed, one must be fixed:
	'type' is a required property
		hint: A vendor boolean property can use "type: boolean"
	Additional properties are not allowed ('maximum', 'minimum' were unexpected)
		hint: A vendor boolean property can use "type: boolean"
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,squelch-detector-bp: 'oneOf' conditional failed, one must be fixed:
		'enum' is a required property
		'const' is a required property
		hint: A vendor string property with exact values has an implicit type
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,squelch-detector-bp: 'oneOf' conditional failed, one must be fixed:
		'$ref' is a required property
		'allOf' is a required property
		hint: A vendor property needs a $ref to types.yaml
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	hint: Vendor specific properties must have a type and description unless they have a defined, common suffix.
	from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,ls-fs-output-impedance-bp: 'oneOf' conditional failed, one must be fixed:
	'type' is a required property
		hint: A vendor boolean property can use "type: boolean"
	Additional properties are not allowed ('maximum', 'minimum' were unexpected)
		hint: A vendor boolean property can use "type: boolean"
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,ls-fs-output-impedance-bp: 'oneOf' conditional failed, one must be fixed:
		'enum' is a required property
		'const' is a required property
		hint: A vendor string property with exact values has an implicit type
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,ls-fs-output-impedance-bp: 'oneOf' conditional failed, one must be fixed:
		'$ref' is a required property
		'allOf' is a required property
		hint: A vendor property needs a $ref to types.yaml
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	hint: Vendor specific properties must have a type and description unless they have a defined, common suffix.
	from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,hs-amplitude-bp: 'oneOf' conditional failed, one must be fixed:
	'type' is a required property
		hint: A vendor boolean property can use "type: boolean"
	Additional properties are not allowed ('maximum', 'minimum' were unexpected)
		hint: A vendor boolean property can use "type: boolean"
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,hs-amplitude-bp: 'oneOf' conditional failed, one must be fixed:
		'enum' is a required property
		'const' is a required property
		hint: A vendor string property with exact values has an implicit type
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,hs-amplitude-bp: 'oneOf' conditional failed, one must be fixed:
		'$ref' is a required property
		'allOf' is a required property
		hint: A vendor property needs a $ref to types.yaml
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	hint: Vendor specific properties must have a type and description unless they have a defined, common suffix.
	from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,pre-emphasis-duration-bp: 'oneOf' conditional failed, one must be fixed:
	'type' is a required property
		hint: A vendor boolean property can use "type: boolean"
	Additional properties are not allowed ('maximum', 'minimum' were unexpected)
		hint: A vendor boolean property can use "type: boolean"
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,pre-emphasis-duration-bp: 'oneOf' conditional failed, one must be fixed:
		'enum' is a required property
		'const' is a required property
		hint: A vendor string property with exact values has an implicit type
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,pre-emphasis-duration-bp: 'oneOf' conditional failed, one must be fixed:
		'$ref' is a required property
		'allOf' is a required property
		hint: A vendor property needs a $ref to types.yaml
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	hint: Vendor specific properties must have a type and description unless they have a defined, common suffix.
	from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,pre-emphasis-amplitude-bp: 'oneOf' conditional failed, one must be fixed:
	'type' is a required property
		hint: A vendor boolean property can use "type: boolean"
	Additional properties are not allowed ('maximum', 'minimum' were unexpected)
		hint: A vendor boolean property can use "type: boolean"
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,pre-emphasis-amplitude-bp: 'oneOf' conditional failed, one must be fixed:
		'enum' is a required property
		'const' is a required property
		hint: A vendor string property with exact values has an implicit type
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,pre-emphasis-amplitude-bp: 'oneOf' conditional failed, one must be fixed:
		'$ref' is a required property
		'allOf' is a required property
		hint: A vendor property needs a $ref to types.yaml
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	hint: Vendor specific properties must have a type and description unless they have a defined, common suffix.
	from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,hs-disconnect-bp: 'oneOf' conditional failed, one must be fixed:
	'type' is a required property
		hint: A vendor boolean property can use "type: boolean"
	Additional properties are not allowed ('maximum', 'minimum' were unexpected)
		hint: A vendor boolean property can use "type: boolean"
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,hs-disconnect-bp: 'oneOf' conditional failed, one must be fixed:
		'enum' is a required property
		'const' is a required property
		hint: A vendor string property with exact values has an implicit type
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,hs-disconnect-bp: 'oneOf' conditional failed, one must be fixed:
		'$ref' is a required property
		'allOf' is a required property
		hint: A vendor property needs a $ref to types.yaml
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	hint: Vendor specific properties must have a type and description unless they have a defined, common suffix.
	from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,hs-rise-fall-time-bp: 'oneOf' conditional failed, one must be fixed:
	'type' is a required property
		hint: A vendor boolean property can use "type: boolean"
	Additional properties are not allowed ('maximum', 'minimum' were unexpected)
		hint: A vendor boolean property can use "type: boolean"
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,hs-rise-fall-time-bp: 'oneOf' conditional failed, one must be fixed:
		'enum' is a required property
		'const' is a required property
		hint: A vendor string property with exact values has an implicit type
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: properties:qcom,hs-rise-fall-time-bp: 'oneOf' conditional failed, one must be fixed:
		'$ref' is a required property
		'allOf' is a required property
		hint: A vendor property needs a $ref to types.yaml
		from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
	hint: Vendor specific properties must have a type and description unless they have a defined, common suffix.
	from schema $id: http://devicetree.org/meta-schemas/vendor-props.yaml#
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml: ignoring, error in schema: properties: qcom,hs-rise-fall-time-bp
Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.example.dtb:0:0: /example-0/phy@88e2000: failed to match any schema with compatible: ['qcom,sm8150-usb-hs-phy']

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/patch/

This check can fail if there are any dependencies. The base for a patch
series is generally the most recent rc1.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit.


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Re: [PATCH v7 2/3] phy: qcom-snps: Add support for overriding phy tuning parameters

[Pavan Kondeti]

On Tue, May 31, 2022 at 09:44:52PM +0530, Krishna Kurapati wrote:
> Add support for overriding electrical signal tuning parameters for
> SNPS HS Phy.
> 
> Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
> ---
>  drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c | 268 +++++++++++++++++++++++++-
>  1 file changed, 266 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c b/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
> index 5d20378..3a17216 100644
> --- a/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
> +++ b/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
> @@ -52,6 +52,12 @@
>  #define USB2_SUSPEND_N				BIT(2)
>  #define USB2_SUSPEND_N_SEL			BIT(3)
>  

<snip>

> +static void qcom_snps_hsphy_override_param_update_val(
> +			const struct override_param_map map,
> +			s32 dt_val, struct phy_override_seq *seq_entry)
> +{
> +	int i;
> +
> +	/*
> +	 * Param table for each param is in increasing order
> +	 * of dt values. We need to iterate over the list to
> +	 * select the entry that has equal or the next highest value.
> +	 */
> +	for (i = 0; i < map.table_size - 1; i++) {
> +		if (map.param_table[i].value >= dt_val)
> +			break;
> +	}
> +
> +	seq_entry->need_update = true;
> +	seq_entry->offset = map.reg_offset;
> +	seq_entry->mask = map.param_mask;
> +	seq_entry->value =  map.param_table[i].reg << __ffs(map.param_mask);
> +}
> +
> +static void qcom_snps_hsphy_read_override_param_seq(struct device *dev)
> +{
> +	struct device_node *node = dev->of_node;
> +	s32 val;
> +	int ret, i;
> +	struct qcom_snps_hsphy *hsphy;
> +	const struct override_param_map *cfg =
> +		(struct override_param_map *) of_device_get_match_data(dev);

As mentioned in the previous patch-set, the explicit typecast is not needed.

overall, looks good to me. After fixing the above, feel free to use

Reviewed-by: Pavankumar Kondeti <quic_pkondeti@quicinc.com>

Thanks,
Pavan

Re: [PATCH v7 2/3] phy: qcom-snps: Add support for overriding phy tuning parameters

[Pavan Kondeti]

On Tue, May 31, 2022 at 09:44:52PM +0530, Krishna Kurapati wrote:
> Add support for overriding electrical signal tuning parameters for
> SNPS HS Phy.
> 
> Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
> ---
>  drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c | 268 +++++++++++++++++++++++++-
>  1 file changed, 266 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c b/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
> index 5d20378..3a17216 100644
> --- a/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
> +++ b/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
> @@ -52,6 +52,12 @@
>  #define USB2_SUSPEND_N				BIT(2)
>  #define USB2_SUSPEND_N_SEL			BIT(3)
>  

<snip>

> +static void qcom_snps_hsphy_override_param_update_val(
> +			const struct override_param_map map,
> +			s32 dt_val, struct phy_override_seq *seq_entry)
> +{
> +	int i;
> +
> +	/*
> +	 * Param table for each param is in increasing order
> +	 * of dt values. We need to iterate over the list to
> +	 * select the entry that has equal or the next highest value.
> +	 */
> +	for (i = 0; i < map.table_size - 1; i++) {
> +		if (map.param_table[i].value >= dt_val)
> +			break;
> +	}
> +
> +	seq_entry->need_update = true;
> +	seq_entry->offset = map.reg_offset;
> +	seq_entry->mask = map.param_mask;
> +	seq_entry->value =  map.param_table[i].reg << __ffs(map.param_mask);
> +}
> +
> +static void qcom_snps_hsphy_read_override_param_seq(struct device *dev)
> +{
> +	struct device_node *node = dev->of_node;
> +	s32 val;
> +	int ret, i;
> +	struct qcom_snps_hsphy *hsphy;
> +	const struct override_param_map *cfg =
> +		(struct override_param_map *) of_device_get_match_data(dev);

As mentioned in the previous patch-set, the explicit typecast is not needed.

overall, looks good to me. After fixing the above, feel free to use

Reviewed-by: Pavankumar Kondeti <quic_pkondeti@quicinc.com>

Thanks,
Pavan

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Re: [PATCH v7 2/3] phy: qcom-snps: Add support for overriding phy tuning parameters

[Krishna Kurapati PSSNV]

On 6/1/2022 7:38 AM, Pavan Kondeti wrote:
> On Tue, May 31, 2022 at 09:44:52PM +0530, Krishna Kurapati wrote:
>> Add support for overriding electrical signal tuning parameters for
>> SNPS HS Phy.
>>
>> Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
>> ---
>>   drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c | 268 +++++++++++++++++++++++++-
>>   1 file changed, 266 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c b/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
>> index 5d20378..3a17216 100644
>> --- a/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
>> +++ b/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
>> @@ -52,6 +52,12 @@
>>   #define USB2_SUSPEND_N				BIT(2)
>>   #define USB2_SUSPEND_N_SEL			BIT(3)
>>   
> <snip>
>
>> +static void qcom_snps_hsphy_override_param_update_val(
>> +			const struct override_param_map map,
>> +			s32 dt_val, struct phy_override_seq *seq_entry)
>> +{
>> +	int i;
>> +
>> +	/*
>> +	 * Param table for each param is in increasing order
>> +	 * of dt values. We need to iterate over the list to
>> +	 * select the entry that has equal or the next highest value.
>> +	 */
>> +	for (i = 0; i < map.table_size - 1; i++) {
>> +		if (map.param_table[i].value >= dt_val)
>> +			break;
>> +	}
>> +
>> +	seq_entry->need_update = true;
>> +	seq_entry->offset = map.reg_offset;
>> +	seq_entry->mask = map.param_mask;
>> +	seq_entry->value =  map.param_table[i].reg << __ffs(map.param_mask);
>> +}
>> +
>> +static void qcom_snps_hsphy_read_override_param_seq(struct device *dev)
>> +{
>> +	struct device_node *node = dev->of_node;
>> +	s32 val;
>> +	int ret, i;
>> +	struct qcom_snps_hsphy *hsphy;
>> +	const struct override_param_map *cfg =
>> +		(struct override_param_map *) of_device_get_match_data(dev);
> As mentioned in the previous patch-set, the explicit typecast is not needed.
>
> overall, looks good to me. After fixing the above, feel free to use
>
> Reviewed-by: Pavankumar Kondeti <quic_pkondeti@quicinc.com>
>
> Thanks,
> Pavan
My bad, Thanks for the review Pavan. Will fix it in the next patch.

Re: [PATCH v7 2/3] phy: qcom-snps: Add support for overriding phy tuning parameters

[Krishna Kurapati PSSNV]

On 6/1/2022 7:38 AM, Pavan Kondeti wrote:
> On Tue, May 31, 2022 at 09:44:52PM +0530, Krishna Kurapati wrote:
>> Add support for overriding electrical signal tuning parameters for
>> SNPS HS Phy.
>>
>> Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
>> ---
>>   drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c | 268 +++++++++++++++++++++++++-
>>   1 file changed, 266 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c b/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
>> index 5d20378..3a17216 100644
>> --- a/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
>> +++ b/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
>> @@ -52,6 +52,12 @@
>>   #define USB2_SUSPEND_N				BIT(2)
>>   #define USB2_SUSPEND_N_SEL			BIT(3)
>>   
> <snip>
>
>> +static void qcom_snps_hsphy_override_param_update_val(
>> +			const struct override_param_map map,
>> +			s32 dt_val, struct phy_override_seq *seq_entry)
>> +{
>> +	int i;
>> +
>> +	/*
>> +	 * Param table for each param is in increasing order
>> +	 * of dt values. We need to iterate over the list to
>> +	 * select the entry that has equal or the next highest value.
>> +	 */
>> +	for (i = 0; i < map.table_size - 1; i++) {
>> +		if (map.param_table[i].value >= dt_val)
>> +			break;
>> +	}
>> +
>> +	seq_entry->need_update = true;
>> +	seq_entry->offset = map.reg_offset;
>> +	seq_entry->mask = map.param_mask;
>> +	seq_entry->value =  map.param_table[i].reg << __ffs(map.param_mask);
>> +}
>> +
>> +static void qcom_snps_hsphy_read_override_param_seq(struct device *dev)
>> +{
>> +	struct device_node *node = dev->of_node;
>> +	s32 val;
>> +	int ret, i;
>> +	struct qcom_snps_hsphy *hsphy;
>> +	const struct override_param_map *cfg =
>> +		(struct override_param_map *) of_device_get_match_data(dev);
> As mentioned in the previous patch-set, the explicit typecast is not needed.
>
> overall, looks good to me. After fixing the above, feel free to use
>
> Reviewed-by: Pavankumar Kondeti <quic_pkondeti@quicinc.com>
>
> Thanks,
> Pavan
My bad, Thanks for the review Pavan. Will fix it in the next patch.

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