mdio-gpio: Add reset functionality to mdio-gpio driver(v2).

This patch adds phy reset functionality to mdio-gpio driver. Now
mdio_gpio_platform_data has new member as function pointer which can be
filled at the bsp level for a callback from phy infrastructure. Also the
mdio-bitbang driver fills-in the reset function of mii_bus structure.

Without this patch the bsp level code has to takecare of the reseting
PHY's on the bus, which become bit hacky for every bsp and
phy-infrastructure is ignored aswell.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 10 insertions, 0 deletions

diff --git a/drivers/net/phy/mdio-bitbang.c b/drivers/net/phy/mdio-bitbang.c
index 65391891d8c4..daec9b05d168 100644
--- a/drivers/net/phy/mdio-bitbang.c
+++ b/drivers/net/phy/mdio-bitbang.c
@@ -202,6 +202,14 @@ static int mdiobb_write(struct mii_bus *bus, int phy, int reg, u16 val)
         return 0;
 }
 
+static int mdiobb_reset(struct mii_bus *bus)
+{
+        struct mdiobb_ctrl *ctrl = bus->priv;
+        if (ctrl->reset)
+                ctrl->reset(bus);
+        return 0;
+}
+
 struct mii_bus *alloc_mdio_bitbang(struct mdiobb_ctrl *ctrl)
 {
         struct mii_bus *bus;
@@ -214,6 +222,7 @@ struct mii_bus *alloc_mdio_bitbang(struct mdiobb_ctrl *ctrl)
 
         bus->read = mdiobb_read;
         bus->write = mdiobb_write;
+        bus->reset = mdiobb_reset;
         bus->priv = ctrl;
 
         return bus;
diff --git a/drivers/net/phy/mdio-gpio.c b/drivers/net/phy/mdio-gpio.c
index 2843c90f712f..89c5a3eccc12 100644
--- a/drivers/net/phy/mdio-gpio.c
+++ b/drivers/net/phy/mdio-gpio.c
@@ -95,6 +95,7 @@ static struct mii_bus * __devinit mdio_gpio_bus_init(struct device *dev,
                 goto out;
 
         bitbang->ctrl.ops = &mdio_gpio_ops;
+        bitbang->ctrl.reset = pdata->reset;
         bitbang->mdc = pdata->mdc;
         bitbang->mdio = pdata->mdio;