On Fri, 27 Jun 2025 15:17:12 +0200, Jakob Unterwurzacher wrote:
Hardware CS has a very slow rise time of about 6us, causing transmission errors when CS does not reach high between transaction.
It looks like it's not driven actively when transitioning from low to high but switched to input, so only the CPU pull-up pulls it high, slowly. Transitions from high to low are fast. On the oscilloscope, CS looks like an irregular sawtooth pattern like this: _____ ^ / | ^ /| / | /| / | / | / | / | / | ___/ |___/ |_____/ |___
[...]
Applied, thanks!
[1/1] arm64: dts: rockchip: use cs-gpios for spi1 on ringneck commit: 53b6445ad08f07b6f4a84f1434f543196009ed89
Best regards,