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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>
This commit is contained in:
Srinivas Kandagatla 2011-11-15 11:54:15 +00:00 committed by David S. Miller
parent 229a66e3be
commit 64882709ef
4 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/net/phy/mdio-bitbang.c
View File

@ -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;

1
drivers/net/phy/mdio-gpio.c
View File

@ -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;

2
include/linux/mdio-bitbang.h
View File

@ -32,6 +32,8 @@ struct mdiobb_ops {
struct mdiobb_ctrl {
const struct mdiobb_ops *ops;
/* reset callback */
int (*reset)(struct mii_bus *bus);
};
/* The returned bus is not yet registered with the phy layer. */

2
include/linux/mdio-gpio.h
View File

@ -20,6 +20,8 @@ struct mdio_gpio_platform_data {
unsigned int phy_mask;
int irqs[PHY_MAX_ADDR];
/* reset callback */
int (*reset)(struct mii_bus *bus);
};
#endif /* __LINUX_MDIO_GPIO_H */