Low level functions that do not depend on Rockbox kernel, intended to be used by the bootloader, dualboot-installer, RB drivers or other .dfu tools. Change-Id: If80214d26e505265ace19d9704f1e1300f98b2f4
Configures piezo GPIO ports for the lowest power consumption when not in use. Change-Id: If80b0c947f197277972fd9319b8ab283cca96d3c
Based on the piezo driver for the nano2g. Signed-off-by: Nils Wallménius <nils@rockbox.org>