diff options
Diffstat (limited to 'drivers/phy/phy-miphy28lp.c')
| -rw-r--r-- | drivers/phy/phy-miphy28lp.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/phy/phy-miphy28lp.c b/drivers/phy/phy-miphy28lp.c index d8ff8956ed05..87dcc9ab7f23 100644 --- a/drivers/phy/phy-miphy28lp.c +++ b/drivers/phy/phy-miphy28lp.c @@ -204,6 +204,7 @@ struct miphy28lp_phy { bool osc_rdy; bool px_rx_pol_inv; bool ssc; + bool tx_impedance; struct reset_control *miphy_rst; @@ -632,6 +633,12 @@ static void miphy_pcie_tune_ssc(struct miphy28lp_phy *miphy_phy) } } +static inline void miphy_tune_tx_impedance(struct miphy28lp_phy *miphy_phy) +{ + /* Compensate Tx impedance to avoid out of range values */ + writeb_relaxed(0x02, miphy_phy->base + MIPHY_COMP_POSTP); +} + static inline int miphy28lp_configure_sata(struct miphy28lp_phy *miphy_phy) { void __iomem *base = miphy_phy->base; @@ -670,6 +677,9 @@ static inline int miphy28lp_configure_sata(struct miphy28lp_phy *miphy_phy) if (miphy_phy->ssc) miphy_sata_tune_ssc(miphy_phy); + if (miphy_phy->tx_impedance) + miphy_tune_tx_impedance(miphy_phy); + return 0; } @@ -703,6 +713,9 @@ static inline int miphy28lp_configure_pcie(struct miphy28lp_phy *miphy_phy) if (miphy_phy->ssc) miphy_pcie_tune_ssc(miphy_phy); + if (miphy_phy->tx_impedance) + miphy_tune_tx_impedance(miphy_phy); + return 0; } @@ -1154,6 +1167,9 @@ static int miphy28lp_of_probe(struct device_node *np, miphy_phy->ssc = of_property_read_bool(np, "st,ssc-on"); + miphy_phy->tx_impedance = + of_property_read_bool(np, "st,tx-impedance-comp"); + of_property_read_u32(np, "st,sata-gen", &miphy_phy->sata_gen); if (!miphy_phy->sata_gen) miphy_phy->sata_gen = SATA_GEN1; |