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of: mdio: provide devm_of_mdiobus_register()

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Implement a managed variant of of_mdiobus_register(). We need to make
mdio_devres into its own module because otherwise we'd hit circular
sumbol dependencies between phylib and of_mdio.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bartosz Golaszewski
2020-06-29 14:03:45 +02:00
committed by David S. Miller
parent a0bd96f5ae
commit 14eeb6e086
4 changed files with 44 additions and 1 deletions
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37
drivers/net/phy/mdio_devres.c
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@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0-or-later
#include <linux/device.h>
#include <linux/of_mdio.h>
#include <linux/phy.h>
#include <linux/stddef.h>
@@ -94,3 +95,39 @@ int __devm_mdiobus_register(struct device *dev, struct mii_bus *bus,
return 0;
}
EXPORT_SYMBOL(__devm_mdiobus_register);
#if IS_ENABLED(CONFIG_OF_MDIO)
/**
* devm_of_mdiobus_register - Resource managed variant of of_mdiobus_register()
* @dev: Device to register mii_bus for
* @mdio: MII bus structure to register
* @np: Device node to parse
*/
int devm_of_mdiobus_register(struct device *dev, struct mii_bus *mdio,
struct device_node *np)
{
struct mdiobus_devres *dr;
int ret;
if (WARN_ON(!devres_find(dev, devm_mdiobus_free,
mdiobus_devres_match, mdio)))
return -EINVAL;
dr = devres_alloc(devm_mdiobus_unregister, sizeof(*dr), GFP_KERNEL);
if (!dr)
return -ENOMEM;
ret = of_mdiobus_register(mdio, np);
if (ret) {
devres_free(dr);
return ret;
}
dr->mii = mdio;
devres_add(dev, dr);
return 0;
}
EXPORT_SYMBOL(devm_of_mdiobus_register);
#endif /* CONFIG_OF_MDIO */
MODULE_LICENSE("GPL");