lkml.org 
[lkml]   [2022]   [Feb]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/3] phy: qcom-snps: Add support for overriding phy tuning parameters
Date
Added support for overriding x0,x1,x2,x3 params for SNPS PHY.

Signed-off-by: Sandeep Maheswaram <quic_c_sanm@quicinc.com>
---
drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c | 45 +++++++++++++++++++++++++++
1 file changed, 45 insertions(+)

diff --git a/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c b/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
index 7e61202..3cf90fa 100644
--- a/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
+++ b/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
@@ -51,6 +51,12 @@
#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)
@@ -90,6 +96,11 @@ struct qcom_snps_hsphy {

bool phy_initialized;
enum phy_mode mode;
+
+ u8 override_x0;
+ u8 override_x1;
+ u8 override_x2;
+ u8 override_x3;
};

static inline void qcom_snps_hsphy_write_mask(void __iomem *base, u32 offset,
@@ -222,6 +233,19 @@ 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);

+ if (hsphy->override_x0)
+ qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X0,
+ PARAM_OVRD_MASK, hsphy->override_x0);
+ if (hsphy->override_x1)
+ qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X1,
+ PARAM_OVRD_MASK, hsphy->override_x1);
+ if (hsphy->override_x2)
+ qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X2,
+ PARAM_OVRD_MASK, hsphy->override_x2);
+ if (hsphy->override_x3)
+ qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X3,
+ PARAM_OVRD_MASK, hsphy->override_x3);
+
qcom_snps_hsphy_write_mask(hsphy->base,
USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON2,
VREGBYPASS, VREGBYPASS);
@@ -294,6 +318,7 @@ static int qcom_snps_hsphy_probe(struct platform_device *pdev)
struct phy *generic_phy;
int ret, i;
int num;
+ u32 value;

hsphy = devm_kzalloc(dev, sizeof(*hsphy), GFP_KERNEL);
if (!hsphy)
@@ -329,6 +354,26 @@ static int qcom_snps_hsphy_probe(struct platform_device *pdev)
return ret;
}

+ if (!of_property_read_u32(dev->of_node, "qcom,override_x0",
+ &value)) {
+ hsphy->override_x0 = (u8)value;
+ }
+
+ if (!of_property_read_u32(dev->of_node, "qcom,override_x1",
+ &value)) {
+ hsphy->override_x1 = (u8)value;
+ }
+
+ if (!of_property_read_u32(dev->of_node, "qcom,override_x2",
+ &value)) {
+ hsphy->override_x2 = (u8)value;
+ }
+
+ if (!of_property_read_u32(dev->of_node, "qcom,override_x3",
+ &value)) {
+ hsphy->override_x3 = (u8)value;
+ }
+
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
/*
--
2.7.4
\
 
 \ /
  Last update: 2022-02-15 20:23    [W:0.116 / U:2.084 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site