linux-kernel - [PATCH 0/5] ARM: Initial devicetree for Kobo Aura

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Message-Id: <20190319152421.16179-1-j.neuschaefer@gmx.net>
Date:   Tue, 19 Mar 2019 16:24:15 +0100
From:   Jonathan Neuschäfer <j.neuschaefer@....net>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Thierry Reding <treding@...dia.com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Kevin Hilman <khilman@...libre.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Jagan Teki <jagan@...rulasolutions.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Johan Hovold <johan@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Jonathan Neuschäfer <j.neuschaefer@....net>
Subject: [PATCH 0/5] ARM: Initial devicetree for Kobo Aura

This series adds a devicetree for the i.MX507-based Kobo Aura e-book
reader, and fixes a few things in imx50.dtsi along the way.

A lot of functionality is still missing:
- poweroff/reboot, RTC, and battery monitoring support, as well as a PWM
  channel for the display backlight are provided by a custom embedded
  controller, which will be supported by a future patchset.
  The EC driver will also tell the EC to keep the board powered on;
  otherwise the EC will power the board off after about ten seconds
  (presumably to avoid battery drain if the OS is missing or corrupted)
- The touchscreen controller, eKTF2132, currently doesn't have a
  mainline driver.
- The e-paper display controller (EPDC) embedded in the i.MX50 SoC will
  need a whole new DRM driver, devicetree bindings, etc.
- The TPS65185 PMIC, which generates the voltages necessary for driving
  the E Ink panel, also needs a driver
- The backlight doesn't quite fit the existing pwm-backlight DT binding,
  because it uses an additional GPIO to boost the brightness. This
  requires some devicetree work
- Linux doesn't currently support suspend-to-ram on i.MX50

In order to keep the system running when CONFIG_PM is enabled, the
following fix is also required:
https://lore.kernel.org/lkml/20190318231737.8459-1-j.neuschaefer@gmx.net/

My own notes about this machine can be found here:
https://github.com/neuschaefer/linux/wiki/Kobo-Aura

Jonathan Neuschäfer (5):
  dt-bindings: Add vendor prefix for Rakuten Kobo, Inc.
  ARM: dts: imx50: Add Kobo Aura DTS
  ARM: dts: imx50: Add PHY node for usbotg and adjust clocks
  ARM: dts: imx50-kobo-aura: Enable USB support
  ARM: dts: imx50: Fix the numbering of the I2C controllers

 .../devicetree/bindings/vendor-prefixes.txt   |   1 +
 arch/arm/boot/dts/Makefile                    |   3 +-
 arch/arm/boot/dts/imx50-kobo-aura.dts         | 263 ++++++++++++++++++
 arch/arm/boot/dts/imx50.dtsi                  |  14 +-
 4 files changed, 279 insertions(+), 2 deletions(-)
 create mode 100644 arch/arm/boot/dts/imx50-kobo-aura.dts

--
2.20.1