From: Fabien Lahoudere <fabien.lahoudere-ZGY8ohtN/8pPYcu2f3hruQ@public.gmane.org>
To: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Peter.Chen-3arQi8VN3Tc@public.gmane.org,
gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org,
linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
mark.rutland-5wv7dgnIgG8@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH v5 2/2] usb: chipidea: imx: Add binding to disable USB 60Mhz clock
Date: Mon, 26 Sep 2016 11:00:53 +0200 [thread overview]
Message-ID: <22314d5c-e19b-02fb-d794-23da2e03fe07@collabora.co.uk> (raw)
In-Reply-To: <20160923194728.GA7120@rob-hp-laptop>
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-ZGY8ohtN/8pPYcu2f3hruQ@public.gmane.org>
>> ---
>> 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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next prev parent reply other threads:[~2016-09-26 9:00 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-21 9:07 [PATCH v5 0/2] usb: chipidea: imx: Add USB configuration for imx53 Fabien Lahoudere
[not found] ` <1474448827-8354-1-git-send-email-fabien.lahoudere-ZGY8ohtN/8pPYcu2f3hruQ@public.gmane.org>
2016-09-21 9:07 ` [PATCH v5 1/2] usb: chipidea: imx: configure imx for ULPI phy Fabien Lahoudere
2016-09-21 9:07 ` [PATCH v5 2/2] usb: chipidea: imx: Add binding to disable USB 60Mhz clock Fabien Lahoudere
2016-09-23 19:47 ` Rob Herring
2016-09-26 9:00 ` Fabien Lahoudere [this message]
2016-09-26 8:18 ` Sascha Hauer
2016-09-26 8:54 ` Fabien Lahoudere
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