From: Andreas Kemnade <andreas@kemnade.info>
To: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Cc: p.zabel@pengutronix.de, airlied@linux.ie, daniel@ffwll.ch,
robh+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de,
kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com,
maarten.lankhorst@linux.intel.com, mripard@kernel.org,
tzimmermann@suse.de, dri-devel@lists.freedesktop.org,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, alistair@alistair23.me,
samuel@sholland.org, josua.mayer@jm0.eu,
letux-kernel@openphoenux.org
Subject: Re: [RFC PATCH 1/6] dt-bindings: display: imx: Add EPDC
Date: Thu, 17 Feb 2022 12:31:12 +0100 [thread overview]
Message-ID: <20220217123112.3ba70000@aktux> (raw)
In-Reply-To: <36445c86-036e-0942-a9a4-919595886c67@canonical.com>
On Thu, 17 Feb 2022 10:21:15 +0100
Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> wrote:
> On 06/02/2022 09:00, Andreas Kemnade wrote:
> > Add a binding for the Electrophoretic Display Controller found at least
> > in the i.MX6.
> > The timing subnode is directly here to avoid having display parameters
> > spread all over the plate.
> >
> > Supplies are organized the same way as in the fbdev driver in the
> > NXP/Freescale kernel forks. The regulators used for that purpose,
> > like the TPS65185, the SY7636A and MAX17135 have typically a single bit to
> > start a bunch of regulators of higher or negative voltage with a
> > well-defined timing. VCOM can be handled separately, but can also be
> > incorporated into that single bit.
> >
> > Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
> > ---
> > .../bindings/display/imx/fsl,mxc-epdc.yaml | 159 ++++++++++++++++++
> > 1 file changed, 159 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,mxc-epdc.yaml
> >
[..]
> > +
> > + DISPLAY-supply:
> > + description:
> > + A couple of +/- voltages automatically powered on in a defintive order
>
> Typo, definitive?
>
yes, of course.
> > +
> > + VCOM-supply:
> > + description: compensation voltage
> > +
> > + V3P3-supply:
>
> All of supplies names - lowercase.
>
> > + description: V3P3 supply
> > +
> > + epd-thermal-zone:
> > + description:
> > + Zone to get temperature of the EPD from, practically ambient temperature.
>
> Is it a phandle?
>
a string used in
of_property_read_string(priv->drm.dev->of_node,
"epd-thermal-zone", &thermal);
if (thermal) {
priv->thermal = thermal_zone_get_zone_by_name(thermal);
if (IS_ERR(priv->thermal))
return dev_err_probe(priv->drm.dev, PTR_ERR(priv->thermal),
"unable to get thermal");
}
[...]
> > +examples:
> > + - |
> > + #include <dt-bindings/clock/imx6sl-clock.h>
> > + #include <dt-bindings/interrupt-controller/arm-gic.h>
> > +
> > + epdc: epdc@20f4000 {
>
> Generic node name, e.g. display-controller
>
hmm, does IHMO not make too much sense here. E.g. in the imx6sll.dtsi
we have lcd-controller next to it. So having epd-controller? But that
is exactly what epdc stands for.
Regards,
Andreas
next prev parent reply other threads:[~2022-02-17 11:31 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-06 8:00 [RFC PATCH 0/6] drm: EPDC driver for i.MX6 Andreas Kemnade
2022-02-06 8:00 ` [RFC PATCH 1/6] dt-bindings: display: imx: Add EPDC Andreas Kemnade
2022-02-11 15:46 ` Rob Herring
2022-02-14 22:45 ` Andreas Kemnade
2022-02-16 23:52 ` Rob Herring
2022-02-17 9:21 ` Krzysztof Kozlowski
2022-02-17 11:31 ` Andreas Kemnade [this message]
2022-02-17 11:43 ` Krzysztof Kozlowski
2022-03-12 19:23 ` Jonathan Neuschäfer
2022-03-14 22:04 ` Andreas Kemnade
2022-02-06 8:00 ` [RFC PATCH 2/6] drm: Add skeleton for EPDC driver Andreas Kemnade
2022-03-12 19:41 ` Jonathan Neuschäfer
2022-02-06 8:00 ` [RFC PATCH 3/6] drm: mxc-epdc: Add display and waveform initialisation Andreas Kemnade
2022-03-12 20:12 ` Jonathan Neuschäfer
2022-02-06 8:00 ` [RFC PATCH 4/6] drm: mxc-epdc: Add update management Andreas Kemnade
2022-03-12 20:21 ` Jonathan Neuschäfer
2022-02-06 8:00 ` [RFC PATCH 5/6] ARM: dts: imx6sll: add EPDC Andreas Kemnade
2022-02-06 8:00 ` [RFC PATCH 6/6] arm: dts: imx6sl: Add EPDC Andreas Kemnade
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