From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nagarjuna Kristam Subject: [Patch V2 05/18] phy: tegra: xusb: Add support to get companion USB 3 port Date: Wed, 18 Dec 2019 14:46:18 +0530 Message-ID: <1576660591-10383-6-git-send-email-nkristam@nvidia.com> References: <1576660591-10383-1-git-send-email-nkristam@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1576660591-10383-1-git-send-email-nkristam@nvidia.com> Sender: linux-kernel-owner@vger.kernel.org To: balbi@kernel.org, gregkh@linuxfoundation.org, thierry.reding@gmail.com, jonathanh@nvidia.com, mark.rutland@arm.com, robh+dt@kernel.org, kishon@ti.com Cc: devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Nagarjuna Kristam List-Id: linux-tegra@vger.kernel.org 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 --- 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 5bde8f1..e75cd71 100644 --- a/drivers/phy/tegra/xusb.c +++ b/drivers/phy/tegra/xusb.c @@ -1256,6 +1256,27 @@ 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 = tegra_xusb_find_usb2_port(padctl, + port); + struct tegra_xusb_usb3_port *usb3; + int i; + + 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 "); 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