From: Anand Moon <linux.amoon@gmail.com>
To: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>,
linux-phy@lists.infradead.org,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
linux-amlogic@lists.infradead.org,
Linux Kernel <linux-kernel@vger.kernel.org>,
devicetree <devicetree@vger.kernel.org>,
Matt Corallo <oc2udbzfd@mattcorallo.com>,
Rob Herring <robh+dt@kernel.org>,
Kevin Hilman <khilman@baylibre.com>,
Jerome Brunet <jbrunet@baylibre.com>,
Kishon Vijay Abraham I <kishon@ti.com>,
Vinod Koul <vkoul@kernel.org>,
Emiliano Ingrassia <ingrassia@epigenesys.com>,
Brian Kim <brian.kim@hardkernel.com>
Subject: Re: [PATCHv3 1/6] ARM: dts: meson8b: odroidc1: Add usb phy power node
Date: Sat, 25 Sep 2021 23:11:58 +0530 [thread overview]
Message-ID: <CANAwSgTcTCNWD3QTt4-c8BeAbFxDewbZewaSouggPuK9cpSXog@mail.gmail.com> (raw)
In-Reply-To: <CAFBinCDmNt+aXRE4xFZdegOUs8BqJiTPF3+DQ-buvWWXrQLkdw@mail.gmail.com>
Hi Martin,
On Tue, 21 Sept 2021 at 00:56, Martin Blumenstingl
<martin.blumenstingl@googlemail.com> wrote:
>
> Hi Anand,
>
> On Tue, Aug 31, 2021 at 10:48 PM Anand Moon <linux.amoon@gmail.com> wrote:
> [...]
> > After enabling CONFIG_REGULATOR_DEBUG, with this patch applied
> > I still not getting the USB regulator to enable.
> > Do you see different output at your end?
> I don't have much time for testing and debugging currently but I'll
> put it on my TODO-list
> Until either of us has found the issue I suggest not merging this patch.
>
Ok no problem.
Basically, I have just roughly gone through the architecture of
Amlogic's OTG framework.
Below is the global configuration registers for DWC2 OTG framer work
[0] https://github.com/hardkernel/linux/blob/odroidc-3.10.y/drivers/amlogic/usb/dwc_otg/310/dwc_otg_regs.h#L66-L151
Within some configurations, it helps tune the power for vbus and interrupt
For example
[1] https://github.com/hardkernel/linux/blob/odroidc-3.10.y/drivers/amlogic/usb/dwc_otg/310/dwc_otg_attr.c#L666-L717
Amlogic basically used the mode parameter to external tune the DWC2 driver
it could help more fine-tuning the driver.
[2] https://github.com/hardkernel/linux/blob/odroidc-3.10.y/drivers/amlogic/usb/dwc_otg/310/dwc_otg_driver.c#L1461-L1703
I feel we need to identify many more PHY tuning parameters to make the
USB work correctly.
Thanks
-Anand
>
> Best regards,
> Martin
next prev parent reply other threads:[~2021-09-25 17:42 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-17 4:15 [PATCHv3 0/6] Meson-8b and Meson-gxbb Fix some missing code Anand Moon
2021-08-17 4:15 ` [PATCHv3 1/6] ARM: dts: meson8b: odroidc1: Add usb phy power node Anand Moon
2021-08-28 15:53 ` Martin Blumenstingl
2021-08-30 7:45 ` Neil Armstrong
2021-08-30 19:37 ` Martin Blumenstingl
2021-08-31 14:50 ` Neil Armstrong
2021-08-31 20:47 ` Anand Moon
2021-09-20 19:26 ` Martin Blumenstingl
2021-09-25 17:41 ` Anand Moon [this message]
2021-08-17 4:15 ` [PATCHv3 2/6] ARM: dts: meson8b: odroidc1: Set usb power source to always on Anand Moon
2021-08-28 15:56 ` Martin Blumenstingl
2021-08-17 4:15 ` [PATCHv3 3/6] arm64: dts: amlogic: odroidc2: Fix the chip enable signal for usb power Anand Moon
2021-08-28 16:00 ` Martin Blumenstingl
2021-08-17 4:15 ` [PATCHv3 4/6] arm64: dts: amlogic: odroidc2: use vbus-supply for power source for usb nodes Anand Moon
2021-08-28 16:06 ` Martin Blumenstingl
2021-08-17 4:15 ` [PATCHv3 5/6] phy: amlogic: meson8b-usb2: Power off the PHY by putting it into reset mode Anand Moon
2021-08-17 10:30 ` Vinod Koul
2021-08-17 4:15 ` [PATCHv3 6/6] phy: amlogic: meson8b-usb2: don't log an error on -EPROBE_DEFER Anand Moon
2021-08-17 10:31 ` Vinod Koul
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CANAwSgTcTCNWD3QTt4-c8BeAbFxDewbZewaSouggPuK9cpSXog@mail.gmail.com \
--to=linux.amoon@gmail.com \
--cc=brian.kim@hardkernel.com \
--cc=devicetree@vger.kernel.org \
--cc=ingrassia@epigenesys.com \
--cc=jbrunet@baylibre.com \
--cc=khilman@baylibre.com \
--cc=kishon@ti.com \
--cc=linux-amlogic@lists.infradead.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-phy@lists.infradead.org \
--cc=martin.blumenstingl@googlemail.com \
--cc=narmstrong@baylibre.com \
--cc=oc2udbzfd@mattcorallo.com \
--cc=robh+dt@kernel.org \
--cc=vkoul@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).