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Date: Mon, 26 Sep 2016 11:00:53 +0200 From: Fabien Lahoudere <fabien.lahoudere@...labora.co.uk> To: Rob Herring <robh@...nel.org> Cc: Peter.Chen@....com, gregkh@...uxfoundation.org, linux-usb@...r.kernel.org, mark.rutland@....com, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH v5 2/2] usb: chipidea: imx: Add binding to disable USB 60Mhz clock Hi, On 23/09/16 21:47, Rob Herring wrote: > On Wed, Sep 21, 2016 at 11:07:07AM +0200, Fabien Lahoudere wrote: >> This binding allow to disable the internal 60Mhz clock for USB host2 or >> host3. >> >> Signed-off-by: Fabien Lahoudere <fabien.lahoudere@...labora.co.uk> >> --- >> Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt | 1 + >> drivers/usb/chipidea/ci_hdrc_imx.c | 2 ++ >> drivers/usb/chipidea/ci_hdrc_imx.h | 1 + >> drivers/usb/chipidea/usbmisc_imx.c | 13 +++++++++++++ >> 4 files changed, 17 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt >> index 0e03344..f83da66 100644 >> --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt >> +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt >> @@ -84,6 +84,7 @@ i.mx specific properties >> - over-current-active-high: over current signal polarity is high active, >> typically over current signal polarity is low active. >> - external-vbus-divider: enables off-chip resistor divider for Vbus >> +- disable-int60ck: disable internal 60MHz clock for usb host2 or host3 on imx53 > > Doesn't this depend on something else like the type of phy connected? If > not, when can you do this or not? > We can disable it in OTG mode and with ULPI phy and Sascha Hauer think we can do it without dt binding for example based on PHY mode. So I will remove the binding and just disable clock if ULPI is selected. > Rob > Fabien
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