r8169: enable ASPM on RTL8106E

The Intel SoC was prevented from entering lower idle state because
of RTL8106E's ASPM was not enabled.

So enable ASPM on RTL8106E (chip version 39).
Now the Intel SoC can enter lower idle state, power consumption and
temperature are much lower.

Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index 8195b1f5036dbce244a34bde345ae1f780b4e470..b0a803e9663409d73874b7d950abe69c3d3d558c 100644 (file)
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -5627,6 +5627,8 @@ static void rtl_hw_start_8402(struct rtl8169_private *tp)
 
 static void rtl_hw_start_8106(struct rtl8169_private *tp)
 {
+       rtl_hw_aspm_clkreq_enable(tp, false);
+
        /* Force LAN exit from ASPM if Rx/Tx are not idle */
        RTL_W32(tp, FuncEvent, RTL_R32(tp, FuncEvent) | 0x002800);
 
@@ -5635,6 +5637,7 @@ static void rtl_hw_start_8106(struct rtl8169_private *tp)
        RTL_W8(tp, DLLPR, RTL_R8(tp, DLLPR) & ~PFM_EN);
 
        rtl_pcie_state_l2l3_enable(tp, false);
+       rtl_hw_aspm_clkreq_enable(tp, true);
 }
 
 static void rtl_hw_start_8101(struct rtl8169_private *tp)