bcm_pmb_bpcm_read
err = bcm_pmb_bpcm_read(pmb, bus, device, offset, &val);
err = bcm_pmb_bpcm_read(pmb, bus, device, offset, &val);
err = bcm_pmb_bpcm_read(pmb, bus, device, offset, &val);
err = bcm_pmb_bpcm_read(pmb, bus, device, BPCM_CAPABILITIES, &val);