Symbol: SV_IREG_DRIVE_CTRL
sound/pci/sonicvibes.c
1277
snd_sonicvibes_out(sonic, SV_IREG_DRIVE_CTRL, 0); /* drive current 16mA */
sound/pci/sonicvibes.c
1279
snd_sonicvibes_out(sonic, SV_IREG_DRIVE_CTRL, 0x40); /* drive current 8mA */