From: Marcel Ziswiler <marcel.ziswiler@toradex.com>
To: "laurent.pinchart@ideasonboard.com" <laurent.pinchart@ideasonboard.com>
Cc: "linux-imx@nxp.com" <linux-imx@nxp.com>,
"aisheng.dong@nxp.com" <aisheng.dong@nxp.com>,
"reinhold.mueller@emtrion.com" <reinhold.mueller@emtrion.com>,
"frowand.list@gmail.com" <frowand.list@gmail.com>,
"alexander.stein@ew.tq-group.com"
<alexander.stein@ew.tq-group.com>,
"olof@lixom.net" <olof@lixom.net>,
"tharvey@gateworks.com" <tharvey@gateworks.com>,
"shawnguo@kernel.org" <shawnguo@kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"kernel@pengutronix.de" <kernel@pengutronix.de>,
"arnd@arndb.de" <arnd@arndb.de>,
"s.hauer@pengutronix.de" <s.hauer@pengutronix.de>,
"robh+dt@kernel.org" <robh+dt@kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"festevam@gmail.com" <festevam@gmail.com>,
"alexandru.marginean@nxp.com" <alexandru.marginean@nxp.com>
Subject: Re: [PATCH v2 3/3] arm64: dts: freescale: add initial support for verdin imx8m plus
Date: Fri, 25 Mar 2022 08:17:18 +0000 [thread overview]
Message-ID: <bd89bb9bf215484be9894fb0ae4052324c84ab9a.camel@toradex.com> (raw)
In-Reply-To: <Yjz5fBwxhr0aBNsU@pendragon.ideasonboard.com>
Hi Laurent
On Fri, 2022-03-25 at 01:06 +0200, Laurent Pinchart wrote:
> Hi Marcel,
>
> A couple more comments.
>
> On Wed, Mar 23, 2022 at 03:36:00PM +0100, Marcel Ziswiler wrote:
> > From: Marcel Ziswiler <marcel.ziswiler@toradex.com>
> >
> > This patch adds the device tree to support Toradex Verdin iMX8M Plus [1]
> > a computer on module which can be used on different carrier boards.
> >
> > The module consists of an NXP i.MX 8M Plus family SoC (either i.MX 8M
> > Plus Quad or 8M Plus QuadLite), a PCA9450C PMIC, a Gigabit Ethernet PHY,
> > 1, 2, 4 or 8 GB of LPDDR4 RAM, an eMMC, a TLA2024 ADC, an I2C EEPROM, an
> > RX8130 RTC, an optional I2C temperature sensor plus an optional
> > Bluetooth/Wi-Fi module.
> >
> > Anything that is not self-contained on the module is disabled by
> > default.
> >
> > The device tree for the Dahlia includes the module's device tree and
> > enables the supported peripherals of the carrier board.
> >
> > The device tree for the Verdin Development Board includes the module's
> > device tree as well as the Dahlia one as it is a superset and supports
> > almost all peripherals available.
> >
> > So far there is no display functionality supported at all but basic
> > console UART, USB host, eMMC and Ethernet functionality work fine.
> >
> > [1] https://www.toradex.com/computer-on-modules/verdin-arm-family/nxp-imx-8m-plus
> >
> > Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
> > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> >
> > ---
> >
> > Changes in v2:
> > - Fix capitatlisation of verdin in comments as reported by Laurent.
> > - Add/modify todo comments as suggested by Laurent.
> > - Add Laurent's reviewed- and tested-by tags.
> >
> > arch/arm64/boot/dts/freescale/Makefile | 4 +
> > .../dts/freescale/imx8mp-verdin-dahlia.dtsi | 129 ++
> > .../boot/dts/freescale/imx8mp-verdin-dev.dtsi | 44 +
> > .../imx8mp-verdin-nonwifi-dahlia.dts | 18 +
> > .../freescale/imx8mp-verdin-nonwifi-dev.dts | 18 +
> > .../dts/freescale/imx8mp-verdin-nonwifi.dtsi | 54 +
> > .../freescale/imx8mp-verdin-wifi-dahlia.dts | 18 +
> > .../dts/freescale/imx8mp-verdin-wifi-dev.dts | 18 +
> > .../dts/freescale/imx8mp-verdin-wifi.dtsi | 82 +
> > .../boot/dts/freescale/imx8mp-verdin.dtsi | 1373 +++++++++++++++++
> > 10 files changed, 1758 insertions(+)
> > create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-verdin-dahlia.dtsi
> > create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-verdin-dev.dtsi
> > create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-verdin-nonwifi-dahlia.dts
> > create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-verdin-nonwifi-dev.dts
> > create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-verdin-nonwifi.dtsi
> > create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-verdin-wifi-dahlia.dts
> > create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-verdin-wifi-dev.dts
> > create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-verdin-wifi.dtsi
> > create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
>
> [snip]
>
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-
> > verdin.dtsi
> > new file mode 100644
> > index 000000000000..8cad1d865720
> > --- /dev/null
> > +++ b/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
> > @@ -0,0 +1,1373 @@
>
> [snip]
>
> > +/* Verdin I2C_2_DSI */
> > +&i2c2 {
> > + clock-frequency = <10000>;
>
> Did you really mean 10kHz here, not 100kHz ?
Yes, we really saw issues with certain displays/screens in the past. I mean, it's not like reading a few bytes
off a DDC/EDID at such low-speed makes much of a difference time-wise. So we rather avoid issues. Anyway, could
easily be overridden in a custom carrier board device tree should that I2C bus be used for something where
speed might matter.
> > + pinctrl-names = "default", "gpio";
> > + pinctrl-0 = <&pinctrl_i2c2>;
> > + pinctrl-1 = <&pinctrl_i2c2_gpio>;
>
> Shouldn't you also specify scl-gpios and sda-gpios, like for the other
> I2C buses ?
Yes, working on the Verdin iMX8M Mini update patch set of late and comparing stuff I also just discovered that
one yesterday. Will send a v3 shortly. Thanks!
> > +
> > + atmel_mxt_ts_mezzanine: touch-mezzanine@4a {
> > + compatible = "atmel,maxtouch";
> > + /* Verdin GPIO_3 (SODIMM 210) */
> > + interrupt-parent = <&gpio1>;
> > + interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
> > + reg = <0x4a>;
> > + /* Verdin GPIO_2 (SODIMM 208) */
> > + reset-gpios = <&gpio1 1 GPIO_ACTIVE_HIGH>;
> > + status = "disabled";
> > + };
> > +};
>
> [snip]
next prev parent reply other threads:[~2022-03-25 8:17 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-23 14:35 [PATCH v2 0/3] arm64: prepare and add verdin imx8m plus support Marcel Ziswiler
2022-03-23 14:35 ` [PATCH v2 1/3] arm64: dts: imx8mp: add uart2 dma Marcel Ziswiler
2022-03-23 14:35 ` [PATCH v2 2/3] dt-bindings: arm: fsl: add toradex,verdin-imx8mp et al Marcel Ziswiler
2022-03-23 14:36 ` [PATCH v2 3/3] arm64: dts: freescale: add initial support for verdin imx8m plus Marcel Ziswiler
2022-03-24 23:06 ` Laurent Pinchart
2022-03-25 8:17 ` Marcel Ziswiler [this message]
2022-03-25 9:26 ` Laurent Pinchart
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