RSS Bot Posted June 25, 2022 Share Posted June 25, 2022 Description After some inspections related to pwm patch recently introduced and reverted on v5.18 kernel patchset (see https://github.com/armbian/build/pull/3928), it turned out that some boards (OrangePI 4/LTS, Tinkerboard 2) use a pinctrl configuration name active which is inherited from legacy kernel. Mainline kernel does not use such pinctrl configuration name, but wants default. This effect of this misnaming is an increased voltage supplied to "vdd_log" regulator and an increased power consumption since the configuration active is just ignored on mainline kernel. Power consumption has been tested using a regular multimeter, on my OrangePI 4 LTS board, and with the patch applied results in a saving of ~40mA (200mW). Jira reference number AR-1247 How Has This Been Tested? Please describe the tests that you ran to verify your changes. Please also note any relevant details for your test configuration. [x] Built a Ubuntu Jammy Xfce image for OrangePI 4 LTS and tested on the board Checklist: [x] My code follows the style guidelines of this project [x] I have performed a self-review of my own code [x] I have commented my code, particularly in hard-to-understand areas [x] I have made corresponding changes to the documentation [x] My changes generate no new warnings [x] Any dependent changes have been merged and published in downstream modules View the full article Link to comment Share on other sites More sharing options...
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