[PATCH net-next 6/9] net: phy: icplus: don't set APS_EN bit on IP101G

[Michael Walle]

This bit is reserved as 'always-write-1'. While this is not a particular
error, because we are only setting it, guard it by checking the model to
prevent errors in the future.

Signed-off-by: Michael Walle <mich...@walle.cc>
---
 drivers/net/phy/icplus.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/net/phy/icplus.c b/drivers/net/phy/icplus.c
index 189a9a34ed5f..a6e1c7611f15 100644
--- a/drivers/net/phy/icplus.c
+++ b/drivers/net/phy/icplus.c
@@ -250,7 +250,7 @@ static int ip101a_g_probe(struct phy_device *phydev)
 static int ip101a_g_config_init(struct phy_device *phydev)
 {
        struct ip101a_g_phy_priv *priv = phydev->priv;
-       int err, c;
+       int err;
 
        /* configure the RXER/INTR_32 pin of the 32-pin IP101GR if needed: */
        switch (priv->sel_intr32) {
@@ -280,11 +280,16 @@ static int ip101a_g_config_init(struct phy_device *phydev)
                break;
        }
 
-       /* Enable Auto Power Saving mode */
-       c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
-       c |= IP101A_G_APS_ON;
+       /* Enable Auto Power Saving mode on IP101A, on IP101G this bit is
+        * reserved as 'write-one'.
+        */
+       if (priv->model == IP101A) {
+               err = phy_set_bits(phydev, IP10XX_SPEC_CTRL_STATUS, 
IP101A_G_APS_ON);
+               if (err)
+                       return err;
+       }
 
-       return phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c);
+       return 0;
 }
 
 static int ip101a_g_ack_interrupt(struct phy_device *phydev)
-- 
2.20.1