Purism and the Linux 5.2 Kernel

• About
• Latest Posts

Guido Günther

Phone Developer

Latest posts by Guido Günther (see all)

• Opportunistic Word Completion - December 21, 2023
• Developing for Mobile Linux with Phosh – Part 0: Running Nested - February 21, 2023
• Phosh 2022 in Retrospect - January 9, 2023

Hello again. Following up on our report for the Linux 5.1 kernel, here’s a list of contributions for the Linux 5.2 kernel cycle, for which our team recently contributed with 14 patches–including a new driver for the Librem 5 devkit’s panel:

Support for the Librem 5 devkit’s proximity and light sensor

The following series of patches added support to the devkit’s VCNL4040 proximity and light sensor, the VCNL4000 driver:

• dt-bindings: iio: light: add vcnl4040 devicetree bindings
• iio: light: vcnl4000 add support for the VCNL4040 proximity and light sensor
• dt-bindings: iio: light: add vcnl4000 devicetree bindings
• iio: light: vcnl4000 add devicetree hooks
• iio: light: vcnl4000 use word writes instead of byte writes

Support for the imx8MQs thermal management unit

In this case, the driver was already there–but the device tree needed quite a few additions to enable the TMU:

• arm64: dts:i.MX8MQ: enable the multi sensor TMU

Support for the Librem 5 devkit’s LCD panel

This series of patches added a new DRM panel driver to the devkit’s LCD panel:

• drm/panel: Add Rocktech jh057n00900 panel driver
• dt-bindings: Add Rocktech jh057n00900 panel bindings
• dt-bindings: Add vendor prefix for ROCKTECH DISPLAYS LIMITED
• dt-bindings: display/panel: Add missing unit names

DMA related fixes

Here are several SDMA-related fixes, which are important when it comes to sound:

• dmaengine: imx-sdma: Only check ratio on parts that support 1:1
• arm64: dts:i.MX8MQ: Change ahb clock for imx8mq
• arm64: dts:i.MX8MQ: Fix the fsl,imx8mq-sdma compatible string

DSI related fixes

Finally, a clock addition, in preparation for DSI support:

• clk: i.MX8MQ: Add dsi_ipg_div

We have also contributed with two reviews to already published patches.

That’s it for today, many thanks to all the reviewers so far—and do stay tuned, there’s more to come for the 5.3!