Hi Geert, On Wed, Mar 20, 2019, Geert Uytterhoeven wrote: > Hi Simon, Magnus, Chris, > > This patch series adds support for devices on the I2C bus on the RSKRZA1 > board, including the GPIO expander that drives 3 LEDs. > > Thanks! Very cool. I figured there was a more graceful way of turning on/off those LEDs than what I was doing...which was just writing to the I2C bus in my LED heartbeat kernel thread. https://github.com/renesas-rz/rza_linux-4.19/blob/master/arch/arm/mach-shmobile/board-rskrza1.c#L145 Chris