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usb: typec: tcpci: Add callback for evaluating contaminant presence

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This change adds callback to evaluate presence of contaminant in
the TCPCI layer.

Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20230114093246.1933321-2-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Badhri Jagan Sridharan 2023-01-14 01:32:45 -08:00 committed by Greg Kroah-Hartman
parent 599f008c25
commit abc028a270
2 changed files with 18 additions and 0 deletions
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11
drivers/usb/typec/tcpm/tcpci.c
View file

@ -404,6 +404,14 @@ static void tcpci_frs_sourcing_vbus(struct tcpc_dev *dev)
tcpci->data->frs_sourcing_vbus(tcpci, tcpci->data);
}
static void tcpci_check_contaminant(struct tcpc_dev *dev)
{
struct tcpci *tcpci = tcpc_to_tcpci(dev);
if (tcpci->data->check_contaminant)
tcpci->data->check_contaminant(tcpci, tcpci->data);
}
static int tcpci_set_bist_data(struct tcpc_dev *tcpc, bool enable)
{
struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
@ -782,6 +790,9 @@ struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data)
tcpci->tcpc.frs_sourcing_vbus = tcpci_frs_sourcing_vbus;
tcpci->tcpc.set_partner_usb_comm_capable = tcpci_set_partner_usb_comm_capable;
if (tcpci->data->check_contaminant)
tcpci->tcpc.check_contaminant = tcpci_check_contaminant;
if (tcpci->data->auto_discharge_disconnect) {
tcpci->tcpc.enable_auto_vbus_discharge = tcpci_enable_auto_vbus_discharge;
tcpci->tcpc.set_auto_vbus_discharge_threshold =

7
include/linux/usb/tcpci.h
View file

@ -188,6 +188,12 @@ struct tcpci;
* Optional; The USB Communications Capable bit indicates if port
* partner is capable of communication over the USB data lines
* (e.g. D+/- or SS Tx/Rx). Called to notify the status of the bit.
* @check_contaminant:
* Optional; The callback is invoked when chiplevel drivers indicated
* that the USB port needs to be checked for contaminant presence.
* Chip level drivers are expected to check for contaminant and call
* tcpm_clean_port when the port is clean to put the port back into
* toggling state.
*/
struct tcpci_data {
struct regmap *regmap;
@ -204,6 +210,7 @@ struct tcpci_data {
void (*frs_sourcing_vbus)(struct tcpci *tcpci, struct tcpci_data *data);
void (*set_partner_usb_comm_capable)(struct tcpci *tcpci, struct tcpci_data *data,
bool capable);
void (*check_contaminant)(struct tcpci *tcpci, struct tcpci_data *data);
};
struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data);