From 7257fbc7c598617ca71605089264c61636d52157 Mon Sep 17 00:00:00 2001 From: Badhri Jagan Sridharan Date: Mon, 17 May 2021 12:21:12 -0700 Subject: [PATCH] usb: typec: tcpci: Implement callback for apply_rc APPLY RC is defined as ROLE_CONTROL.CC1 != ROLE_CONTROL.CC2 and POWER_CONTROL.AutodischargeDisconnect is 0. When ROLE_CONTROL.CC1 == ROLE_CONTROL.CC2, set the other CC to OPEN. Fixes: f321a02caebd ("usb: typec: tcpm: Implement enabling Auto Discharge disconnect support") Reviewed-by: Guenter Roeck Acked-by: Heikki Krogerus Signed-off-by: Badhri Jagan Sridharan Link: https://lore.kernel.org/r/20210517192112.40934-4-badhri@google.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/tcpm/tcpci.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c index 25b480752266..34b5095cc84f 100644 --- a/drivers/usb/typec/tcpm/tcpci.c +++ b/drivers/usb/typec/tcpm/tcpci.c @@ -115,6 +115,32 @@ static int tcpci_set_cc(struct tcpc_dev *tcpc, enum typec_cc_status cc) return 0; } +int tcpci_apply_rc(struct tcpc_dev *tcpc, enum typec_cc_status cc, enum typec_cc_polarity polarity) +{ + struct tcpci *tcpci = tcpc_to_tcpci(tcpc); + unsigned int reg; + int ret; + + ret = regmap_read(tcpci->regmap, TCPC_ROLE_CTRL, ®); + if (ret < 0) + return ret; + + /* + * APPLY_RC state is when ROLE_CONTROL.CC1 != ROLE_CONTROL.CC2 and vbus autodischarge on + * disconnect is disabled. Bail out when ROLE_CONTROL.CC1 != ROLE_CONTROL.CC2. + */ + if (((reg & (TCPC_ROLE_CTRL_CC2_MASK << TCPC_ROLE_CTRL_CC2_SHIFT)) >> + TCPC_ROLE_CTRL_CC2_SHIFT) != + ((reg & (TCPC_ROLE_CTRL_CC1_MASK << TCPC_ROLE_CTRL_CC1_SHIFT)) >> + TCPC_ROLE_CTRL_CC1_SHIFT)) + return 0; + + return regmap_update_bits(tcpci->regmap, TCPC_ROLE_CTRL, polarity == TYPEC_POLARITY_CC1 ? + TCPC_ROLE_CTRL_CC2_MASK << TCPC_ROLE_CTRL_CC2_SHIFT : + TCPC_ROLE_CTRL_CC1_MASK << TCPC_ROLE_CTRL_CC1_SHIFT, + TCPC_ROLE_CTRL_CC_OPEN); +} + static int tcpci_start_toggling(struct tcpc_dev *tcpc, enum typec_port_type port_type, enum typec_cc_status cc) @@ -728,6 +754,7 @@ struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data) tcpci->tcpc.get_vbus = tcpci_get_vbus; tcpci->tcpc.set_vbus = tcpci_set_vbus; tcpci->tcpc.set_cc = tcpci_set_cc; + tcpci->tcpc.apply_rc = tcpci_apply_rc; tcpci->tcpc.get_cc = tcpci_get_cc; tcpci->tcpc.set_polarity = tcpci_set_polarity; tcpci->tcpc.set_vconn = tcpci_set_vconn;