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    Subject[Patch V5 05/21] phy: tegra: xusb: Add support to get companion USB 3 port
    Date
    Tegra XUSB host, device mode driver requires the USB 3 companion port
    number for corresponding USB 2 port. Add API to retrieve the same.

    Signed-off-by: Nagarjuna Kristam <nkristam@nvidia.com>
    Reviewed-by: JC Kuo <jckuo@nvidia.com>
    Acked-by: Thierry Reding <treding@nvidia.com>
    ---
    V5:
    - No changes.
    ---
    V4:
    - Addressed comment from Thierry.
    - Added Acked-by info.
    ---
    V3:
    - Added Reviewed-by updates to commit message.
    ---
    V2:
    - Added -ENODEV as return instead of -1, to sync other errors.
    ---
    drivers/phy/tegra/xusb.c | 21 +++++++++++++++++++++
    include/linux/phy/tegra/xusb.h | 2 ++
    2 files changed, 23 insertions(+)

    diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c
    index 2c0e29c..a8f0a0b 100644
    --- a/drivers/phy/tegra/xusb.c
    +++ b/drivers/phy/tegra/xusb.c
    @@ -1294,6 +1294,27 @@ int tegra_phy_xusb_utmi_port_reset(struct phy *phy)
    }
    EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_port_reset);

    +int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl,
    + unsigned int port)
    +{
    + struct tegra_xusb_usb2_port *usb2;
    + struct tegra_xusb_usb3_port *usb3;
    + int i;
    +
    + usb2 = tegra_xusb_find_usb2_port(padctl, port);
    + if (!usb2)
    + return -EINVAL;
    +
    + for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
    + usb3 = tegra_xusb_find_usb3_port(padctl, i);
    + if (usb3 && usb3->port == usb2->base.index)
    + return usb3->base.index;
    + }
    +
    + return -ENODEV;
    +}
    +EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_usb3_companion);
    +
    MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
    MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver");
    MODULE_LICENSE("GPL v2");
    diff --git a/include/linux/phy/tegra/xusb.h b/include/linux/phy/tegra/xusb.h
    index 1235865..71d9569 100644
    --- a/include/linux/phy/tegra/xusb.h
    +++ b/include/linux/phy/tegra/xusb.h
    @@ -21,4 +21,6 @@ int tegra_xusb_padctl_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl,
    int tegra_xusb_padctl_set_vbus_override(struct tegra_xusb_padctl *padctl,
    bool val);
    int tegra_phy_xusb_utmi_port_reset(struct phy *phy);
    +int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl,
    + unsigned int port);
    #endif /* PHY_TEGRA_XUSB_H */
    --
    2.7.4
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