linux-kernel - Re: [PATCH v6 04/14] usb: typec: tcpci: Add a getter method to retrieve tcpm

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Message-ID: <20200915121615.GE1139641@kuha.fi.intel.com>
Date:   Tue, 15 Sep 2020 15:16:15 +0300
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Badhri Jagan Sridharan <badhri@...gle.com>
Cc:     Guenter Roeck <linux@...ck-us.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 04/14] usb: typec: tcpci: Add a getter method to
 retrieve tcpm_port reference

On Mon, Aug 31, 2020 at 07:59:17PM -0700, Badhri Jagan Sridharan wrote:
> Allow chip level drivers to retrieve reference to tcpm_port.
> 
> Signed-off-by: Badhri Jagan Sridharan <badhri@...gle.com>

I'm still wondering if this is the right way. Ideally the glue drivers
should not need to deal with the tcpm_port at all directly, only with
the tcpci handle they have. But FWIW:

Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>

> ---
> Change since v1:
> - Changing patch version to v6 to fix version number confusion.
> ---
>  drivers/usb/typec/tcpm/tcpci.c | 6 ++++++
>  drivers/usb/typec/tcpm/tcpci.h | 2 ++
>  2 files changed, 8 insertions(+)
> 
> diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c
> index 7d9491ba62fb..b960fe5a0f28 100644
> --- a/drivers/usb/typec/tcpm/tcpci.c
> +++ b/drivers/usb/typec/tcpm/tcpci.c
> @@ -38,6 +38,12 @@ struct tcpci_chip {
>  	struct tcpci_data data;
>  };
>  
> +struct tcpm_port *tcpci_get_tcpm_port(struct tcpci *tcpci)
> +{
> +	return tcpci->port;
> +}
> +EXPORT_SYMBOL_GPL(tcpci_get_tcpm_port);
> +
>  static inline struct tcpci *tcpc_to_tcpci(struct tcpc_dev *tcpc)
>  {
>  	return container_of(tcpc, struct tcpci, tcpc);
> diff --git a/drivers/usb/typec/tcpm/tcpci.h b/drivers/usb/typec/tcpm/tcpci.h
> index cf9d8b63adcb..04c49a0b0368 100644
> --- a/drivers/usb/typec/tcpm/tcpci.h
> +++ b/drivers/usb/typec/tcpm/tcpci.h
> @@ -150,4 +150,6 @@ struct tcpci *tcpci_register_port(struct device *dev, struct tcpci_data *data);
>  void tcpci_unregister_port(struct tcpci *tcpci);
>  irqreturn_t tcpci_irq(struct tcpci *tcpci);
>  
> +struct tcpm_port;
> +struct tcpm_port *tcpci_get_tcpm_port(struct tcpci *tcpci);
>  #endif /* __LINUX_USB_TCPCI_H */
> -- 
> 2.28.0.402.g5ffc5be6b7-goog

-- 
heikki