lkml.org 
[lkml]   [2020]   [Feb]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH AUTOSEL 5.5 199/542] ARM: dts: imx6: rdu2: Limit USBH1 to Full Speed
    Date
    From: Andrey Smirnov <andrew.smirnov@gmail.com>

    [ Upstream commit 6bb1e09c4c375db29770444f689f35f5cbe696bc ]

    Cabling used to connect devices to USBH1 on RDU2 does not meet USB
    spec cable quality and cable length requirements to operate at High
    Speed, so limit the port to Full Speed only.

    Reported-by: Chris Healy <cphealy@gmail.com>
    Reviewed-by: Chris Healy <cphealy@gmail.com>
    Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
    Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
    Cc: Shawn Guo <shawnguo@kernel.org>
    Cc: Fabio Estevam <festevam@gmail.com>
    Cc: Lucas Stach <l.stach@pengutronix.de>
    Cc: linux-arm-kernel@lists.infradead.org
    Cc: linux-kernel@vger.kernel.org
    Signed-off-by: Shawn Guo <shawnguo@kernel.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi | 1 +
    1 file changed, 1 insertion(+)

    diff --git a/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi b/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi
    index 4ec9fb332610e..cbafadbe86f45 100644
    --- a/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi
    +++ b/arch/arm/boot/dts/imx6qdl-zii-rdu2.dtsi
    @@ -776,6 +776,7 @@
    &usbh1 {
    vbus-supply = <&reg_5p0v_main>;
    disable-over-current;
    + maximum-speed = "full-speed";
    status = "okay";
    };

    --
    2.20.1
    \
     
     \ /
      Last update: 2020-02-14 19:13    [W:4.040 / U:0.028 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site