[PATCH net-next] net: phy: icplus: add config_intr callback

[Heiner Kallweit]

Move IRQ configuration for IP101A/G from config_init to config_intr
callback. Reasons:

1. This allows phylib to disable interrupts if needed.
2. Icplus was the only driver supporting interrupts w/o defining a
   config_intr callback. Now we can add a phylib plausibility check
   disabling interrupt mode if one of the two irq-related callbacks
   isn't defined.

I don't own hardware with this PHY, and the change is based on the
datasheet for IP101A LF (which is supposed to be register-compatible
with IP101A/G). Change is compile-tested only.

Signed-off-by: Heiner Kallweit <hkallwe...@gmail.com>
---
 drivers/net/phy/icplus.c | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/drivers/net/phy/icplus.c b/drivers/net/phy/icplus.c
index 21ce68964..ad87bd328 100644
--- a/drivers/net/phy/icplus.c
+++ b/drivers/net/phy/icplus.c
@@ -42,8 +42,8 @@ MODULE_LICENSE("GPL");
 #define IP1001_APS_ON                  11      /* IP1001 APS Mode  bit */
 #define IP101A_G_APS_ON                        2       /* IP101A/G APS Mode 
bit */
 #define IP101A_G_IRQ_CONF_STATUS       0x11    /* Conf Info IRQ & Status Reg */
-#define        IP101A_G_IRQ_PIN_USED           (1<<15) /* INTR pin used */
-#define        IP101A_G_IRQ_DEFAULT            IP101A_G_IRQ_PIN_USED
+#define        IP101A_G_IRQ_PIN_USED           BIT(15) /* INTR pin used */
+#define        IP101A_G_NO_IRQ                 BIT(11) /* IRQ's inactive */
 
 static int ip175c_config_init(struct phy_device *phydev)
 {
@@ -170,11 +170,6 @@ static int ip101a_g_config_init(struct phy_device *phydev)
        if (c < 0)
                return c;
 
-       /* INTR pin used: speed/link/duplex will cause an interrupt */
-       c = phy_write(phydev, IP101A_G_IRQ_CONF_STATUS, IP101A_G_IRQ_DEFAULT);
-       if (c < 0)
-               return c;
-
        /* Enable Auto Power Saving mode */
        c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
        c |= IP101A_G_APS_ON;
@@ -201,6 +196,19 @@ static int ip175c_config_aneg(struct phy_device *phydev)
        return 0;
 }
 
+static int ip101a_g_config_intr(struct phy_device *phydev)
+{
+       u16 val;
+
+       if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
+               /* INTR pin used: Speed/link/duplex will cause an interrupt */
+               val = IP101A_G_IRQ_PIN_USED;
+       else
+               val = IP101A_G_NO_IRQ;
+
+       return phy_write(phydev, IP101A_G_IRQ_CONF_STATUS, val);
+}
+
 static int ip101a_g_ack_interrupt(struct phy_device *phydev)
 {
        int err = phy_read(phydev, IP101A_G_IRQ_CONF_STATUS);
@@ -234,6 +242,7 @@ static struct phy_driver icplus_driver[] = {
        .name           = "ICPlus IP101A/G",
        .phy_id_mask    = 0x0ffffff0,
        .features       = PHY_BASIC_FEATURES,
+       .config_intr    = ip101a_g_config_intr,
        .ack_interrupt  = ip101a_g_ack_interrupt,
        .config_init    = &ip101a_g_config_init,
        .suspend        = genphy_suspend,
-- 
2.19.1