Date:   Thu, 16 Jul 2020 14:38:14 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        David Heidelberg <david@...t.cz>,
        Peter Geis <pgwipeout@...il.com>,
        Stephen Warren <swarren@...dotorg.org>,
        Nicolas Chauvet <kwizart@...il.com>,
        Pedro Ângelo <pangelo@...d.io>,
        Matt Merhar <mattmerhar@...tonmail.com>,
        Zack Pearsall <zpearsall@...oo.com>,
        linux-tegra@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v10 0/6] Support NVIDIA Tegra-based Acer A500 and Nexus 7
 devices

On Mon, Jun 29, 2020 at 05:54:50AM +0300, Dmitry Osipenko wrote:
> Hello,
> 
> This series introduces upstream kernel support for Acer Iconia Tab A500
> and ASUS Google Nexus 7 tablet devices. Please review and apply, thanks
> in advance.
> 
> Changelog:
> 
> v10:- Rebased on a recent linux-next which got some device-tree changes:
> 
>         - Renamed sdhci@ DT nodes to mmc@
>         - Removed simple-busses from DTs
>         - Checked DTBs using upcoming YAML bindings from Thierry Reding
> 
> v9: - Nexus 7 memory timings are moved out to a separate dtsi file to ease
>       reviewing of the device-trees since the sparse definition of the timings
>       within multiple DT files created some unnecessary confusion.
>       Thanks to Michał Mirosław for the suggestion.
> 
> v8: - The eMMC voltage regulator is now marked as always-ON in all
>       device-trees because turned out that some bootloader versions have
>       assumption about the enabled regulator at a boot time. This fixes
>       machine hanging on a warm reboot, it's also matching the downstream
>       kernel regulator configuration.
> 
>     - The core regulator of the Ti PMIC Nexus 7 variant is now limited
>       to a 1.35V, which is a more realistic limit than 1.5V that was borrowed
>       from the Cardhu device-tree. Now both Maxim and Ti variants have the
>       common limits.
> 
>     - Added acks from Rob Herring.
> 
> v7: - This version brings support for a Nexus 7 variant that uses Ti PMIC
>       instead of the Maxim PMIC. Previously we assumed that variant with
>       the Ti PMIC doesn't exist in a wild, but turned out that it was a
>       wrong assumption. In a result the device-trees are separated into
>       more DTSI pieces, which combined together form the final device-tree.
>       Thanks to Zack Pearsall for testing the Ti version!
> 
>     - The camera voltage regulator is now preset to a correct 1.8v in the
>       Nexus 7 device-tree.
> 
> v6: - Corrected PMIC's RTC alias in the DTs. Sometime ago I renamed the
>       PMIC's node to match the modern upstream styling, but forgot to change
>       the RTC alias. Now PMIC RTC alias uses node's handle instead of string.
> 
>     - Removed "panel: " handle from device trees, which became unused after
>       v5 and I just missed to remove it.
> 
> v5: - After spending some more time on adding LVDS encoder bridge support
>       to the Tegra DRM driver, I'm now having a second thought and agree
>       with Thierry Reding that in a longer run it should be better not to
>       mix old nvidia,panel with new output graph in device-tree. So the
>       nvidia,panel phandle is removed now in both A500 and Nexus 7 DTs.
> 
> v4: - Corrected CPU's thermal zone on both A500 and Nexus 7, which
>       should use the remote thermal sensor (Tegra chip) instead of the
>       local ("skin" temperature).
> 
>     - Added default PMIC pinmux state on Nexus 7, for completeness.
> 
>     - Added PMIC cpu_pwr_req GPIO hog on Nexus 7, for completeness.
> 
>     - Renamed thermal sensor node label to NCT72 on Nexus 7 to match the
>       actual hardware (NCT72 is compatible with NCT1008). For completeness.
> 
>     - Added always-on USB AVDD regulator on Nexus 7, which is controlled by
>       the PMIC GPIO. For completeness.
> 
>     - Added PMIC GPIO enable-control to the 3v3_sys regulator on Nexus 7,
>       for completeness.
> 
>     - Added CONFIG_NAMESPACES, CONFIG_USER_NS, CONFIG_SECCOMP and
>       CONFIG_PINCTRL_MAX77620 to the tegra_defconfig. The first three
>       options are must-have for the modern userspace, the last is somewhat
>       actual now since the default PMIC pinmux state is added to the N7 DT.
> 
> v3: - Improved device-tree node-names in accordance to review comments that
>       were made by Thierry Reding to v2.
> 
>     - Corrected LVDS encoder powerdown-GPIO polarity on both A500 and Nexus 7
>       because I implemented the DRM bridges support in the Tegra DRM driver
>       and found that there was a mistake in the device-trees. The updated
>       polarity also matches the boards schematics. Now DRM bridges support
>       becomes mandatory since LVDS is getting disabled during of the encoder
>       driver probing. I'll send the DRM patch separately from this series.
> 
>     - Replaced recently deprecated CONFIG_DRM_LVDS_ENCODER with the new
>       CONFIG_DRM_LVDS_CODEC in tegra_defconfig.
> 
>     - Added more config options to tegra_defconfig, like pstore and thermal.
> 
>     - Added atmel,cfg_name to the A500 DT, which is a new upcoming property
>       in 5.8+ that allows to specify the per-board hardware config file name.
> 
> v2: - Corrected "volume down" key-label in the grouper's device-tree and
>       improved some other names in device-trees.
> 
>     - Added optional (upcoming in 5.8+) VDD/AVDD regulators to the touchscreen
>       node in A500 device-tree.
> 
> Dmitry Osipenko (6):
>   ARM: tegra: Add device-tree for Acer Iconia Tab A500
>   ARM: tegra: Add device-tree for ASUS Google Nexus 7
>   dt-bindings: Add vendor prefix for Acer Inc.
>   dt-bindings: ARM: tegra: Add Acer Iconia Tab A500
>   dt-bindings: ARM: tegra: Add ASUS Google Nexus 7
>   ARM: tegra_defconfig: Enable options useful for Nexus 7 and Acer A500
> 
>  .../devicetree/bindings/arm/tegra.yaml        |   10 +
>  .../devicetree/bindings/vendor-prefixes.yaml  |    2 +
>  arch/arm/boot/dts/Makefile                    |    4 +
>  .../boot/dts/tegra20-acer-a500-picasso.dts    | 1438 +++++++++++++++
>  .../dts/tegra30-asus-nexus7-grouper-E1565.dts |    9 +
>  .../dts/tegra30-asus-nexus7-grouper-PM269.dts |    9 +
>  .../tegra30-asus-nexus7-grouper-common.dtsi   | 1232 +++++++++++++
>  ...egra30-asus-nexus7-grouper-maxim-pmic.dtsi |  185 ++
>  ...30-asus-nexus7-grouper-memory-timings.dtsi | 1565 +++++++++++++++++
>  .../tegra30-asus-nexus7-grouper-ti-pmic.dtsi  |  149 ++
>  .../boot/dts/tegra30-asus-nexus7-grouper.dtsi |  149 ++
>  .../dts/tegra30-asus-nexus7-tilapia-E1565.dts |    9 +
>  ...30-asus-nexus7-tilapia-memory-timings.dtsi |  325 ++++
>  .../boot/dts/tegra30-asus-nexus7-tilapia.dtsi |  235 +++
>  arch/arm/configs/tegra_defconfig              |   42 +
>  15 files changed, 5363 insertions(+)
>  create mode 100644 arch/arm/boot/dts/tegra20-acer-a500-picasso.dts
>  create mode 100644 arch/arm/boot/dts/tegra30-asus-nexus7-grouper-E1565.dts
>  create mode 100644 arch/arm/boot/dts/tegra30-asus-nexus7-grouper-PM269.dts
>  create mode 100644 arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi
>  create mode 100644 arch/arm/boot/dts/tegra30-asus-nexus7-grouper-maxim-pmic.dtsi
>  create mode 100644 arch/arm/boot/dts/tegra30-asus-nexus7-grouper-memory-timings.dtsi
>  create mode 100644 arch/arm/boot/dts/tegra30-asus-nexus7-grouper-ti-pmic.dtsi
>  create mode 100644 arch/arm/boot/dts/tegra30-asus-nexus7-grouper.dtsi
>  create mode 100644 arch/arm/boot/dts/tegra30-asus-nexus7-tilapia-E1565.dts
>  create mode 100644 arch/arm/boot/dts/tegra30-asus-nexus7-tilapia-memory-timings.dtsi
>  create mode 100644 arch/arm/boot/dts/tegra30-asus-nexus7-tilapia.dtsi

Applied, thanks.

Thierry

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