GPCPLL_CFG_ENABLE
nvkm_mask(device, GPCPLL_CFG, GPCPLL_CFG_ENABLE, GPCPLL_CFG_ENABLE);
nvkm_mask(device, GPCPLL_CFG, GPCPLL_CFG_ENABLE, 0);
return val & GPCPLL_CFG_ENABLE;
nvkm_mask(device, GPCPLL_CFG, GPCPLL_CFG_ENABLE, GPCPLL_CFG_ENABLE);
nvkm_mask(device, GPCPLL_CFG, GPCPLL_CFG_ENABLE, 0);