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usb: typec: tcpci_maxim: Enable VSAFE0V signalling 

Unmask EXTENDED_STATUS_MASK.vSafe0V, ALERT.Extended_Status
and set vbus_vsafe0v to enable VSAFE0V signalling.

Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20201202040840.663578-3-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Badhri Jagan Sridharan 2020-12-01 20:08:40 -08:00 committed by Greg Kroah-Hartman
parent 766c485b86
commit 0fbb7d06d3
1 changed files with 15 additions and 1 deletions
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16
drivers/usb/typec/tcpm/tcpci_maxim.c
View File

@ -112,11 +112,18 @@ static void max_tcpci_init_regs(struct max_tcpci_chip *chip)
return;
}
/* Enable VSAFE0V detection */
ret = max_tcpci_write8(chip, TCPC_EXTENDED_STATUS_MASK, TCPC_EXTENDED_STATUS_VSAFE0V);
if (ret < 0) {
dev_err(chip->dev, "Unable to unmask TCPC_EXTENDED_STATUS_VSAFE0V ret:%d\n", ret);
return;
}
alert_mask = TCPC_ALERT_TX_SUCCESS | TCPC_ALERT_TX_DISCARDED | TCPC_ALERT_TX_FAILED |
TCPC_ALERT_RX_HARD_RST | TCPC_ALERT_RX_STATUS | TCPC_ALERT_CC_STATUS |
TCPC_ALERT_VBUS_DISCNCT | TCPC_ALERT_RX_BUF_OVF | TCPC_ALERT_POWER_STATUS |
/* Enable Extended alert for detecting Fast Role Swap Signal */
TCPC_ALERT_EXTND;
TCPC_ALERT_EXTND | TCPC_ALERT_EXTENDED_STATUS;
ret = max_tcpci_write16(chip, TCPC_ALERT_MASK, alert_mask);
if (ret < 0) {
@ -315,6 +322,12 @@ static irqreturn_t _max_tcpci_irq(struct max_tcpci_chip *chip, u16 status)
}
}
if (status & TCPC_ALERT_EXTENDED_STATUS) {
ret = max_tcpci_read8(chip, TCPC_EXTENDED_STATUS, (u8 *)&reg_status);
if (ret >= 0 && (reg_status & TCPC_EXTENDED_STATUS_VSAFE0V))
tcpm_vbus_change(chip->port);
}
if (status & TCPC_ALERT_RX_STATUS)
process_rx(chip, status);
@ -442,6 +455,7 @@ static int max_tcpci_probe(struct i2c_client *client, const struct i2c_device_id
chip->data.init = tcpci_init;
chip->data.frs_sourcing_vbus = max_tcpci_frs_sourcing_vbus;
chip->data.auto_discharge_disconnect = true;
chip->data.vbus_vsafe0v = true;
max_tcpci_init_regs(chip);
chip->tcpci = tcpci_register_port(chip->dev, &chip->data);