@@ -137,6 +137,37 @@ static void max_tcpci_init_regs(struct max_tcpci_chip *chip)
return;
}
+u32 max_tcpci_get_auto_vbus_discharge_threshold(struct tcpci *tcpci, struct tcpci_data *data,
+ enum typec_role port_role,
+ enum typec_pwr_opmode mode, bool pps_active,
+ u32 requested_vbus_voltage_mv)
+{
+ struct max_tcpci_chip *chip = tdata_to_max_tcpci(data);
+ u32 threshold = 0;
+ u8 pwr_ctrl;
+
+ if (port_role == TYPEC_SINK) {
+ max_tcpci_read8(chip, TCPC_POWER_CTRL, &pwr_ctrl);
+ if (pwr_ctrl & TCPC_FAST_ROLE_SWAP_EN) {
+ /* To prevent disconnect when the source is fast role swap is capable. */
+ threshold = 3500;
+ } else if (mode == TYPEC_PWR_MODE_PD) {
+ if (pps_active)
+ threshold = (95 * requested_vbus_voltage_mv / 100) - 850;
+ else
+ threshold = (95 * requested_vbus_voltage_mv / 100) - 1250;
+ } else {
+ /* 3.5V for non-pd sink */
+ threshold = 3500;
+ }
+ } else {
+ /* 4V for source */
+ threshold = 4000;
+ }
+
+ return threshold;
+}
+
static void process_rx(struct max_tcpci_chip *chip, u16 status)
{
struct pd_message msg;
@@ -441,6 +472,8 @@ static int max_tcpci_probe(struct i2c_client *client, const struct i2c_device_id
chip->data.start_drp_toggling = max_tcpci_start_toggling;
chip->data.TX_BUF_BYTE_x_hidden = true;
chip->data.init = tcpci_init;
+ chip->data.get_auto_vbus_discharge_threshold = max_tcpci_get_auto_vbus_discharge_threshold;
+ chip->data.auto_discharge_disconnect = true;
max_tcpci_init_regs(chip);
chip->tcpci = tcpci_register_port(chip->dev, &chip->data);
Programs VBUS_SINK_DISCONNECT_THRESHOLD based on the power_role, voltage requested as sink, mode of operation. The programmed threshold is based on vSinkDisconnect and vSinkDisconnectPD values. Signed-off-by: Badhri Jagan Sridharan <badhri@google.com> --- Changes since v1: - Changing patch version to v6 to fix version number confusion. Changes since v6: - Rebase on usb-next. Changes since v7: - Heikki's suggestion: Moved the actual write of TCPC_VBUS_SINK_DISCONNECT_THRES register to tcpci code. --- drivers/usb/typec/tcpm/tcpci_maxim.c | 33 ++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+)