From: swarren@wwwdotorg•org (Stephen Warren)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v2 4/9] pinctrl: tegra-xusb: Add USB PHY support
Date: Mon, 25 Aug 2014 13:22:38 -0600 [thread overview]
Message-ID: <53FB8CFE.3090007@wwwdotorg.org> (raw)
In-Reply-To: <1408381705-3623-5-git-send-email-abrestic@chromium.org>
On 08/18/2014 11:08 AM, Andrew Bresticker wrote:
> In addition to the PCIe and SATA PHYs, the XUSB pad controller also
> supports 3 UTMI, 2 HSIC, and 2 USB3 PHYs. Each USB3 PHY uses a single
> PCIe or SATA lane and is mapped to one of the three UTMI ports.
>
> The xHCI controller will also send messages intended for the PHY driver,
> so request and listen for messages on the mailbox's PHY channel.
I'd like a review from Thierry here as the HW expert.
I need an ack from LinusW in order to take this pinctrl patch through
the Tegra tree.
> diff --git a/drivers/pinctrl/pinctrl-tegra-xusb.c b/drivers/pinctrl/pinctrl-tegra-xusb.c
> +static int usb3_phy_power_on(struct phy *phy)
> +{
> + struct tegra_xusb_padctl *padctl = phy_get_drvdata(phy);
> + int port = usb3_phy_to_port(phy);
> + int lane = padctl->usb3_ports[port].lane;
> + u32 value, offset;
> +
> + if (!is_pcie_or_sata_lane(lane)) {
> + dev_err(padctl->dev, "USB3 PHY %d mapped to invalid lane: %d\n",
> + port, lane);
> + return -EINVAL;
> + }
An aside: This implies that the SATA driver should be talking to this
pinctrl driver and explicitly powering on the XUSB pins. However, the
SATA driver doesn't depend on this series. I'm a bit confused how that
works. Perhaps it's just by accident? Mikko, can you comment?
> +static int utmi_phy_to_port(struct phy *phy)
> +{
> + struct tegra_xusb_padctl *padctl = phy_get_drvdata(phy);
> + int i;
> +
> + for (i = 0; i < TEGRA_XUSB_UTMI_PHYS; i++) {
> + if (phy == padctl->phys[TEGRA_XUSB_PADCTL_UTMI_P0 + i])
> + break;
> + }
> + BUG_ON(i == TEGRA_XUSB_UTMI_PHYS);
Can this be triggered by e.g. bad DT content? If so, returning an error
would be nicer. The comment applies to other xxx_to_port() functions.
> @@ -896,6 +1933,22 @@ static int tegra_xusb_padctl_probe(struct platform_device *pdev)
> + for (i = 0; i < TEGRA_XUSB_USB3_PHYS; i++) {
> + char prop[sizeof("nvidia,usb3-port-N-lane")];
> + u32 lane;
> +
> + sprintf(prop, "nvidia,usb3-port-%d-lane", i);
> + if (!of_property_read_u32(pdev->dev.of_node, prop, &lane)) {
> + if (!is_pcie_or_sata_lane(lane)) {
> + err = -EINVAL;
> + goto unregister;
It'd be nice to print a message so that the user/developer knows what's
wrong with the DT.
next prev parent reply other threads:[~2014-08-25 19:22 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-18 17:08 [PATCH v2 0/9] Tegra xHCI support Andrew Bresticker
2014-08-18 17:08 ` [PATCH v2 1/9] of: Add NVIDIA Tegra XUSB mailbox binding Andrew Bresticker
2014-08-25 18:48 ` Stephen Warren
2014-08-25 19:06 ` Stephen Warren
2014-08-27 16:33 ` Andrew Bresticker
2014-08-18 17:08 ` [PATCH v2 2/9] mailbox: Add NVIDIA Tegra XUSB mailbox driver Andrew Bresticker
2014-08-25 19:01 ` Stephen Warren
2014-08-26 6:57 ` Thierry Reding
2014-08-26 7:43 ` Arnd Bergmann
2014-08-26 7:50 ` Thierry Reding
2014-08-26 8:09 ` Arnd Bergmann
2014-08-26 9:08 ` Thierry Reding
2014-08-26 9:54 ` Arnd Bergmann
2014-08-26 10:20 ` Thierry Reding
2014-08-26 11:35 ` Arnd Bergmann
2014-08-26 11:45 ` Thierry Reding
2014-08-26 8:54 ` David Laight
2014-08-26 10:04 ` Arnd Bergmann
2014-08-27 17:38 ` Andrew Bresticker
2014-08-27 17:50 ` Stephen Warren
2014-08-27 18:13 ` Andrew Bresticker
2014-08-27 18:19 ` Stephen Warren
2014-08-27 21:56 ` Andrew Bresticker
2014-08-27 22:30 ` Stephen Warren
2014-08-27 19:26 ` Jassi Brar
2014-08-18 17:08 ` [PATCH v2 3/9] of: Update Tegra XUSB pad controller binding for USB Andrew Bresticker
2014-08-25 19:12 ` Stephen Warren
2014-08-27 16:36 ` Andrew Bresticker
2014-08-27 16:42 ` Stephen Warren
2014-08-18 17:08 ` [PATCH v2 4/9] pinctrl: tegra-xusb: Add USB PHY support Andrew Bresticker
2014-08-25 19:22 ` Stephen Warren [this message]
2014-08-26 7:29 ` Mikko Perttunen
2014-08-27 16:44 ` Andrew Bresticker
2014-08-29 13:36 ` Linus Walleij
2014-08-18 17:08 ` [PATCH v2 5/9] of: Add NVIDIA Tegra xHCI controller binding Andrew Bresticker
2014-08-25 19:26 ` Stephen Warren
2014-08-18 17:08 ` [PATCH v2 6/9] usb: xhci: Add NVIDIA Tegra xHCI host-controller driver Andrew Bresticker
2014-08-25 19:36 ` Stephen Warren
2014-08-30 21:15 ` Greg Kroah-Hartman
2014-08-31 19:04 ` Andrew Bresticker
2014-08-18 17:08 ` [PATCH v2 7/9] ARM: tegra: Add Tegra124 XUSB mailbox and xHCI controller Andrew Bresticker
2014-08-18 17:08 ` [PATCH v2 8/9] ARM: tegra: jetson-tk1: Add xHCI support Andrew Bresticker
2014-08-18 17:08 ` [PATCH v2 9/9] ARM: tegra: venice2: " Andrew Bresticker
2014-08-18 17:30 ` [PATCH v2 0/9] Tegra " Stephen Warren
2014-08-18 19:35 ` Andrew Bresticker
2014-08-21 13:34 ` Tomeu Vizoso
2014-08-21 17:26 ` Andrew Bresticker
2014-08-22 11:23 ` Tomeu Vizoso
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