[PATCH v3 2/3] phy: qualcomm: phy-qcom-eusb2-repeater: Add squelch detect param update

Krishna Kurapati
2025-12-19T17:31:33Z

Add support for overriding Squelch Detect parameter.

Signed-off-by: Krishna Kurapati <krishna.kurapati@oss.qualcomm.com>
---
.../phy/qualcomm/phy-qcom-eusb2-repeater.c | 22 +++++++++++++++++++
1 file changed, 22 insertions(+)

diff --git a/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c b/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c
index 651a12b59bc8..a75b37d4e16d 100644
--- a/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c
+++ b/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c
@@ -37,6 +37,17 @@
#define EUSB2_TUNE_EUSB_EQU 0x5A
#define EUSB2_TUNE_EUSB_HS_COMP_CUR 0x5B

+static const int squelch_detector[] = {
+ [0] = -6000,
+ [1] = -5000,
+ [2] = -4000,
+ [3] = -3000,
+ [4] = -2000,
+ [5] = -1000,
+ [6] = 0,
+ [7] = 1000,
+};
+
struct eusb2_repeater_init_tbl_reg {
unsigned int reg;
unsigned int value;
@@ -120,7 +131,9 @@ static int eusb2_repeater_init(struct phy *phy)
struct regmap *regmap = rptr->regmap;
u32 base = rptr->base;
u32 poll_val;
+ s32 dt_val;
int ret;
+ int i;
u8 val;

ret = regulator_bulk_enable(rptr->cfg->num_vregs, rptr->vregs);
@@ -147,6 +160,15 @@ static int eusb2_repeater_init(struct phy *phy)
if (!of_property_read_u8(np, "qcom,tune-res-fsdif", &val))
regmap_write(regmap, base + EUSB2_TUNE_RES_FSDIF, val);

+ if (!of_property_read_s32(np, "qcom,squelch-detector-bp", &dt_val)) {
+ for (i = 0; i < ARRAY_SIZE(squelch_detector); i++) {
+ if (squelch_detector[i] == dt_val) {
+ regmap_write(regmap, base + EUSB2_TUNE_SQUELCH_U, i);
+ break;
+ }
+ }
+ }
+
/* Wait for status OK */
ret = regmap_read_poll_timeout(regmap, base + EUSB2_RPTR_STATUS, poll_val,
poll_val & RPTR_OK, 10, 5);
--
2.34.1