[PATCH v2 net-next] net: phy: realtek: enable ALDPS to save power for RTL8211F

[Jisheng Zhang]

Enable ALDPS(Advanced Link Down Power Saving) to save power when
link down.

Signed-off-by: Jisheng Zhang <jisheng.zh...@synaptics.com>
---
Since v1:
 - add what does ALDPS mean.
 - replace magic number 0x18 with RTL8211F_PHYCR1 macro.

 drivers/net/phy/realtek.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c
index 95dbe5e8e1d8..4bf54cded48a 100644
--- a/drivers/net/phy/realtek.c
+++ b/drivers/net/phy/realtek.c
@@ -27,11 +27,16 @@
 #define RTL821x_EXT_PAGE_SELECT                        0x1e
 #define RTL821x_PAGE_SELECT                    0x1f
 
+#define RTL8211F_PHYCR1                                0x18
 #define RTL8211F_INSR                          0x1d
 
 #define RTL8211F_TX_DELAY                      BIT(8)
 #define RTL8211F_RX_DELAY                      BIT(3)
 
+#define RTL8211F_ALDPS_PLL_OFF                 BIT(1)
+#define RTL8211F_ALDPS_ENABLE                  BIT(2)
+#define RTL8211F_ALDPS_XTAL_OFF                        BIT(12)
+
 #define RTL8211E_TX_DELAY                      BIT(1)
 #define RTL8211E_RX_DELAY                      BIT(2)
 #define RTL8211E_MODE_MII_GMII                 BIT(3)
@@ -178,8 +183,12 @@ static int rtl8211f_config_init(struct phy_device *phydev)
 {
        struct device *dev = &phydev->mdio.dev;
        u16 val_txdly, val_rxdly;
+       u16 val;
        int ret;
 
+       val = RTL8211F_ALDPS_ENABLE | RTL8211F_ALDPS_PLL_OFF | 
RTL8211F_ALDPS_XTAL_OFF;
+       phy_modify_paged_changed(phydev, 0xa43, RTL8211F_PHYCR1, val, val);
+
        switch (phydev->interface) {
        case PHY_INTERFACE_MODE_RGMII:
                val_txdly = 0;
-- 
2.28.0