Re: [PATCH v4 8/8] usb: dwc3: Add Amlogic G12A DWC3 glue

From: Martin Blumenstingl
Date: Mon Mar 18 2019 - 15:57:34 EST

Hi Neil,

On Mon, Mar 18, 2019 at 2:29 PM Neil Armstrong <narmstrong@xxxxxxxxxxxx> wrote:
> Adds support for Amlogic G12A USB Control Glue HW.
> The Amlogic G12A SoC Family embeds 2 USB Controllers :
> - a DWC3 IP configured as Host for USB2 and USB3
> - a DWC2 IP configured as Peripheral USB2 Only
> A glue connects these both controllers to 2 USB2 PHYs, and optionnally
> to an USB3+PCIE Combo PHY shared with the PCIE controller.
> The Glue configures the UTMI 8bit interfaces for the USB2 PHYs, including
> routing of the OTG PHY between the DWC3 and DWC2 controllers, and
> setups the on-chip OTG mode selection for this PHY.
> This drivers supports the on-probe setup of the OTG mode, and manually
> via a debugfs interface. The IRQ mode change detect is yet to be added
> in a future patchset, mainly due to lack of hardware to validate on.
> Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
with the small issue fixed (see below) you can add my:
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>

my opinion is that the whole driver is looking great now!
I hope that it will be queued for v5.2 soon because there's no NACK
from the USB / dwc3 maintainers yet.

> + ret = of_platform_populate(np, NULL, NULL, dev);
> + if (ret) {
> + clk_disable_unprepare(priv->clk);
> + clk_put(priv->clk);
clk_disable_unprepare is called automatically since there's now an
devm_add_action_or_reset for that a few lines above
clk_put is also unnecessary because priv->clk is obtained with devm_clk_get()