@@ -722,16 +722,27 @@ static int __maybe_unused qusb2_phy_runtime_resume(struct device *dev)
return ret;
}
+#define QUSB2PHY_HPM_LOAD 30000 /*uA*/
+
static int qusb2_phy_init(struct phy *phy)
{
struct qusb2_phy *qphy = phy_get_drvdata(phy);
const struct qusb2_phy_cfg *cfg = qphy->cfg;
unsigned int val = 0;
unsigned int clk_scheme;
- int ret;
+ int ret, i;
dev_vdbg(&phy->dev, "%s(): Initializing QUSB2 phy\n", __func__);
+ /* set the current load */
+ for (i = 0; i < ARRAY_SIZE(qphy->vregs); i++) {
+ ret = regulator_set_load(qphy->vregs[i].consumer, QUSB2PHY_HPM_LOAD);
+ if (ret) {
+ dev_err(&phy->dev, "failed to set load at %s\n", qphy->vregs[i].supply);
+ return ret;
+ }
+ }
+
/* turn on regulator supplies */
ret = regulator_bulk_enable(ARRAY_SIZE(qphy->vregs), qphy->vregs);
if (ret)
Set the current load before enable regulator supplies at QUSB phy. Encountered one issue where the board powered down instantly once the UVC camera was attached to USB port while adding host mode on usb port and testing a UVC camera with the driver on QCS615 platform. The extensible boot loader mentioned that OCP(Over Current Protection) occurred at LDO12 from regulators-0 upon powered on board again. That indicates that the current load set for QUSB phy, which use the regulator supply, is lower than expected. As per QUSB spec, set the maximum current load at 30mA to avoid overcurrent load when attach a device to the USB port. --- Fixes: 937e17f36a32 ("phy: qcom-qusb2: Power-on PHY before initialization") Signed-off-by: Song Xue <quic_songxue@quicinc.com> --- drivers/phy/qualcomm/phy-qcom-qusb2.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) --- base-commit: decc701f41d07481893fdea942c0ac6b226e84cd change-id: 20241121-add_set_load_to_qusb_phy-d1327c797ffe Best regards,