Re: [PATCH v6 05/14] usb: typec: tcpci: Add set_vbus tcpci callback

Heikki Krogerus
2020-09-15T12:25:44Z

On Mon, Aug 31, 2020 at 07:59:18PM -0700, Badhri Jagan Sridharan wrote:
> set_vbus callback allows TCPC which are TCPCI based, however,
> does not support turning on sink and source mode through
> Command.SinkVbus and Command.SourceVbusDefaultVoltage.
>
> Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
> ---
> Changes since v1:
> - Changing patch version to v6 to fix version number confusion.
> ---
> drivers/usb/typec/tcpm/tcpci.c | 7 +++++++
> drivers/usb/typec/tcpm/tcpci.h | 1 +
> 2 files changed, 8 insertions(+)
>
> diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c
> index b960fe5a0f28..d6a6fac82d48 100644
> --- a/drivers/usb/typec/tcpm/tcpci.c
> +++ b/drivers/usb/typec/tcpm/tcpci.c
> @@ -328,6 +328,13 @@ static int tcpci_set_vbus(struct tcpc_dev *tcpc, bool source, bool sink)
> struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
> int ret;
>
> + if (tcpci->data->set_vbus) {
> + ret = tcpci->data->set_vbus(tcpci, tcpci->data, source, sink);
> + /* Bypass when ret > 0 */
> + if (ret != 0)
> + return ret < 0 ? ret : 0;

Can it return positive value? What does positive value mean?

> + }
> +
> /* Disable both source and sink first before enabling anything */
>
> if (!source) {
> diff --git a/drivers/usb/typec/tcpm/tcpci.h b/drivers/usb/typec/tcpm/tcpci.h
> index 04c49a0b0368..4d441bdf24d5 100644
> --- a/drivers/usb/typec/tcpm/tcpci.h
> +++ b/drivers/usb/typec/tcpm/tcpci.h
> @@ -144,6 +144,7 @@ struct tcpci_data {
> bool enable);
> int (*start_drp_toggling)(struct tcpci *tcpci, struct tcpci_data *data,
> enum typec_cc_status cc);
> + int (*set_vbus)(struct tcpci *tcpci, struct tcpci_data *data, bool source, bool sink);
> };
>
> struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data);
> --
> 2.28.0.402.g5ffc5be6b7-goog

--
heikki