+++ /dev/null
-From 3be2a49e5c08d268f8af0dd4fe89a24ea8cdc339 Mon Sep 17 00:00:00 2001
-From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
-Date: Fri, 16 May 2014 16:14:05 +0200
-Subject: of: provide a binding for fixed link PHYs
-
-Some Ethernet MACs have a "fixed link", and are not connected to a
-normal MDIO-managed PHY device. For those situations, a Device Tree
-binding allows to describe a "fixed link" using a special PHY node.
-
-This patch adds:
-
- * A documentation for the fixed PHY Device Tree binding.
-
- * An of_phy_is_fixed_link() function that an Ethernet driver can call
- on its PHY phandle to find out whether it's a fixed link PHY or
- not. It should typically be used to know if
- of_phy_register_fixed_link() should be called.
-
- * An of_phy_register_fixed_link() function that instantiates the
- fixed PHY into the PHY subsystem, so that when the driver calls
- of_phy_connect(), the PHY device associated to the OF node will be
- found.
-
-These two additional functions also support the old fixed-link Device
-Tree binding used on PowerPC platforms, so that ultimately, the
-network device drivers for those platforms could be converted to use
-of_phy_is_fixed_link() and of_phy_register_fixed_link() instead of
-of_phy_connect_fixed_link(), while keeping compatibility with their
-respective Device Tree bindings.
-
-Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
-Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
-Tested-by: Florian Fainelli <f.fainelli@gmail.com>
-Signed-off-by: David S. Miller <davem@davemloft.net>
-
---- /dev/null
-+++ b/Documentation/devicetree/bindings/net/fixed-link.txt
-@@ -0,0 +1,30 @@
-+Fixed link Device Tree binding
-+------------------------------
-+
-+Some Ethernet MACs have a "fixed link", and are not connected to a
-+normal MDIO-managed PHY device. For those situations, a Device Tree
-+binding allows to describe a "fixed link".
-+
-+Such a fixed link situation is described by creating a 'fixed-link'
-+sub-node of the Ethernet MAC device node, with the following
-+properties:
-+
-+* 'speed' (integer, mandatory), to indicate the link speed. Accepted
-+ values are 10, 100 and 1000
-+* 'full-duplex' (boolean, optional), to indicate that full duplex is
-+ used. When absent, half duplex is assumed.
-+* 'pause' (boolean, optional), to indicate that pause should be
-+ enabled.
-+* 'asym-pause' (boolean, optional), to indicate that asym_pause should
-+ be enabled.
-+
-+Example:
-+
-+ethernet@0 {
-+ ...
-+ fixed-link {
-+ speed = <1000>;
-+ full-duplex;
-+ };
-+ ...
-+};
---- a/drivers/of/of_mdio.c
-+++ b/drivers/of/of_mdio.c
-@@ -14,6 +14,7 @@
- #include <linux/netdevice.h>
- #include <linux/err.h>
- #include <linux/phy.h>
-+#include <linux/phy_fixed.h>
- #include <linux/of.h>
- #include <linux/of_irq.h>
- #include <linux/of_mdio.h>
-@@ -280,3 +281,69 @@ struct phy_device *of_phy_attach(struct
- return phy_attach_direct(dev, phy, flags, iface) ? NULL : phy;
- }
- EXPORT_SYMBOL(of_phy_attach);
-+
-+#if defined(CONFIG_FIXED_PHY)
-+/*
-+ * of_phy_is_fixed_link() and of_phy_register_fixed_link() must
-+ * support two DT bindings:
-+ * - the old DT binding, where 'fixed-link' was a property with 5
-+ * cells encoding various informations about the fixed PHY
-+ * - the new DT binding, where 'fixed-link' is a sub-node of the
-+ * Ethernet device.
-+ */
-+bool of_phy_is_fixed_link(struct device_node *np)
-+{
-+ struct device_node *dn;
-+ int len;
-+
-+ /* New binding */
-+ dn = of_get_child_by_name(np, "fixed-link");
-+ if (dn) {
-+ of_node_put(dn);
-+ return true;
-+ }
-+
-+ /* Old binding */
-+ if (of_get_property(np, "fixed-link", &len) &&
-+ len == (5 * sizeof(__be32)))
-+ return true;
-+
-+ return false;
-+}
-+EXPORT_SYMBOL(of_phy_is_fixed_link);
-+
-+int of_phy_register_fixed_link(struct device_node *np)
-+{
-+ struct fixed_phy_status status = {};
-+ struct device_node *fixed_link_node;
-+ const __be32 *fixed_link_prop;
-+ int len;
-+
-+ /* New binding */
-+ fixed_link_node = of_get_child_by_name(np, "fixed-link");
-+ if (fixed_link_node) {
-+ status.link = 1;
-+ status.duplex = of_property_read_bool(np, "full-duplex");
-+ if (of_property_read_u32(fixed_link_node, "speed", &status.speed))
-+ return -EINVAL;
-+ status.pause = of_property_read_bool(np, "pause");
-+ status.asym_pause = of_property_read_bool(np, "asym-pause");
-+ of_node_put(fixed_link_node);
-+ return fixed_phy_register(PHY_POLL, &status, np);
-+ }
-+
-+ /* Old binding */
-+ fixed_link_prop = of_get_property(np, "fixed-link", &len);
-+ if (fixed_link_prop && len == (5 * sizeof(__be32))) {
-+ status.link = 1;
-+ status.duplex = be32_to_cpu(fixed_link_prop[1]);
-+ status.speed = be32_to_cpu(fixed_link_prop[2]);
-+ status.pause = be32_to_cpu(fixed_link_prop[3]);
-+ status.asym_pause = be32_to_cpu(fixed_link_prop[4]);
-+ return fixed_phy_register(PHY_POLL, &status, np);
-+ }
-+
-+ return -ENODEV;
-+}
-+EXPORT_SYMBOL(of_phy_register_fixed_link);
-+#endif
---- a/include/linux/of_mdio.h
-+++ b/include/linux/of_mdio.h
-@@ -67,4 +67,19 @@ static inline struct mii_bus *of_mdio_fi
- }
- #endif /* CONFIG_OF */
-
-+#if defined(CONFIG_OF) && defined(CONFIG_FIXED_PHY)
-+extern int of_phy_register_fixed_link(struct device_node *np);
-+extern bool of_phy_is_fixed_link(struct device_node *np);
-+#else
-+static inline int of_phy_register_fixed_link(struct device_node *np)
-+{
-+ return -ENOSYS;
-+}
-+static inline bool of_phy_is_fixed_link(struct device_node *np)
-+{
-+ return false;
-+}
-+#endif
-+
-+
- #endif /* __LINUX_OF_MDIO_H */
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