Commit b5b23822 authored by David S. Miller's avatar David S. Miller

Merge branch 'ACPI-support-for-xgmac_mdio-drivers'

Calvin Johnson says:

====================
ACPI support for xgmac_mdio drivers.

This patch series provides ACPI support for xgmac_mdio driver.

Changes in v3:
- handle case MDIOBUS_NO_CAP

Changes in v2:
- Reserve "0" to mean that no mdiobus capabilities have been declared.
- bus->id: change to appropriate printk format specifier
- clean up xgmac_acpi_match
- clariy platform_get_resource() usage with comments
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 1c59bb6b 0f183fd1
......@@ -245,14 +245,19 @@ static int xgmac_mdio_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct mii_bus *bus;
struct resource res;
struct resource *res;
struct mdio_fsl_priv *priv;
int ret;
ret = of_address_to_resource(np, 0, &res);
if (ret) {
/* In DPAA-1, MDIO is one of the many FMan sub-devices. The FMan
* defines a register space that spans a large area, covering all the
* subdevice areas. Therefore, MDIO cannot claim exclusive access to
* this register area.
*/
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "could not obtain address\n");
return ret;
return -EINVAL;
}
bus = mdiobus_alloc_size(sizeof(struct mdio_fsl_priv));
......@@ -263,20 +268,21 @@ static int xgmac_mdio_probe(struct platform_device *pdev)
bus->read = xgmac_mdio_read;
bus->write = xgmac_mdio_write;
bus->parent = &pdev->dev;
snprintf(bus->id, MII_BUS_ID_SIZE, "%llx", (unsigned long long)res.start);
bus->probe_capabilities = MDIOBUS_C22_C45;
snprintf(bus->id, MII_BUS_ID_SIZE, "%pa", &res->start);
/* Set the PHY base address */
priv = bus->priv;
priv->mdio_base = of_iomap(np, 0);
priv->mdio_base = ioremap(res->start, resource_size(res));
if (!priv->mdio_base) {
ret = -ENOMEM;
goto err_ioremap;
}
priv->is_little_endian = of_property_read_bool(pdev->dev.of_node,
priv->is_little_endian = device_property_read_bool(&pdev->dev,
"little-endian");
priv->has_a011043 = of_property_read_bool(pdev->dev.of_node,
priv->has_a011043 = device_property_read_bool(&pdev->dev,
"fsl,erratum-a011043");
ret = of_mdiobus_register(bus, np);
......@@ -320,10 +326,17 @@ static const struct of_device_id xgmac_mdio_match[] = {
};
MODULE_DEVICE_TABLE(of, xgmac_mdio_match);
static const struct acpi_device_id xgmac_acpi_match[] = {
{ "NXP0006" },
{ }
};
MODULE_DEVICE_TABLE(acpi, xgmac_acpi_match);
static struct platform_driver xgmac_mdio_driver = {
.driver = {
.name = "fsl-fman_xmdio",
.of_match_table = xgmac_mdio_match,
.acpi_match_table = xgmac_acpi_match,
},
.probe = xgmac_mdio_probe,
.remove = xgmac_mdio_remove,
......
......@@ -739,10 +739,24 @@ EXPORT_SYMBOL(mdiobus_free);
*/
struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr)
{
struct phy_device *phydev;
struct phy_device *phydev = ERR_PTR(-ENODEV);
int err;
switch (bus->probe_capabilities) {
case MDIOBUS_NO_CAP:
case MDIOBUS_C22:
phydev = get_phy_device(bus, addr, false);
break;
case MDIOBUS_C45:
phydev = get_phy_device(bus, addr, true);
break;
case MDIOBUS_C22_C45:
phydev = get_phy_device(bus, addr, false);
if (IS_ERR(phydev))
phydev = get_phy_device(bus, addr, true);
break;
}
if (IS_ERR(phydev))
return phydev;
......
......@@ -298,6 +298,14 @@ struct mii_bus {
/* RESET GPIO descriptor pointer */
struct gpio_desc *reset_gpiod;
/* bus capabilities, used for probing */
enum {
MDIOBUS_NO_CAP = 0,
MDIOBUS_C22,
MDIOBUS_C45,
MDIOBUS_C22_C45,
} probe_capabilities;
/* protect access to the shared element */
struct mutex shared_lock;
......
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