Commits
Dave Gerlach committed b6aef1c5439
wkup_m3_ipc: Add support for toggling VTT regulator Some boards (currently AM335x EVM-SK) provides s/w control via GPIO to toggle VTT regulator to reduce power consumption in low power state. The VTT regulator should be disabled after enabling self-refresh on suspend, and should be enabled before disabling self-refresh on resume. This is to allow proper self-refresh entry/exit commands to be transmitted to the memory. Add support for toggling VTT regulator using DT properties. Actual toggling happens in CM3 Firmware. The enable option & the GPIO pin used is collected in A8 Core and then sent to CM3 using IPC registers. Note: Here it is assumed that VTT Toggle will be done using a pin on GPIO-0 Instance. The reason is GPIO-0 is in wakeup domain. Signed-off-by: Dave Gerlach <d-gerlach@ti.com> Signed-off-by: Keerthy <j-keerthy@ti.com>