Hi Gregory, Andrew, Gregory CLEMENT <gregory.clem...@free-electrons.com> writes:
>> + if (reg == MII_PHYSID2) { >> + /* The mv88e6390 internal PHYS don't have a model number. >> + * Use the switch family model number instead. >> + */ >> + if (!(*val & 0x3ff)) { > > I tested this series on the Topaz switch but it failed because while I > said we read 0x1410C00 actually we read 0x01410C01. With the > MARVELL_PHY_ID_MASK we mask the 4 lower bits so that's why in my patch > "phy: marvell: Add support for the PHY embedded in the topaz switch" I > used the 0x01410C00 value for MARVELL_PHY_ID_88E6141. > > However with the mask you use it doesn't work. > > So this mask should be changed to 0x3f0 for the Topaz. Actually 0x3fe > would be enough but it seems more logical to use the same mask that for > MARVELL_PHY_ID_MASK. > > We could either use the same mask for both family and still use 6390 as > they seem compatible or we use two different families based on the lower > bit. Since several chips have this issue, we can introduce a u16 physid2_mask member in the mv88e6xxx_info structure and move the check in mv88e6xxx_phy_read() so that the logic of device (as in Global2) helpers are not affected by such (necessary) hack. Something like: static int mv88e6xxx_phy_read(struct mv88e6xxx_chip *chip, int phy, int reg, u16 *val) { ... err = chip->info->ops->phy_read(chip, bus, addr, reg, val); if (err) return err; if (reg == MII_PHYSID2 && chip->info->physid2_mask) { /* Some internal PHYs don't have a model number, * so return the switch family model number directly. */ if (!(*val & chip->info->physid2_mask)) *val |= chip->info->prod_num; } return 0; } Thanks, Vivien