Revert "mvebu: remove linux 4.4 support"

This reverts commit 51397d7d95d9f5e210a5557f65de1fa21e6f5921.
There are some unresolved random crashes on WRT1900AC v1 that still need
to be sorted out

Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 137 insertions, 0 deletions

diff --git a/target/linux/mvebu/patches-4.4/144-phylink-add-module-EEPROM-support.patch b/target/linux/mvebu/patches-4.4/144-phylink-add-module-EEPROM-support.patch
new file mode 100644
index 0000000000..f57f70dd9e
--- /dev/null
+++ b/target/linux/mvebu/patches-4.4/144-phylink-add-module-EEPROM-support.patch
@@ -0,0 +1,137 @@
+From 5419ccb638aa5c353ea88815e98953d9fc02e6ca Mon Sep 17 00:00:00 2001
+From: Russell King <rmk+kernel@arm.linux.org.uk>
+Date: Thu, 1 Oct 2015 23:10:05 +0100
+Subject: [PATCH 732/744] phylink: add module EEPROM support
+
+Add support for reading module EEPROMs through phylink.
+
+Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
+---
+ drivers/net/phy/phylink.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++
+ include/linux/phylink.h   | 12 +++++++++
+ 2 files changed, 78 insertions(+)
+
+--- a/drivers/net/phy/phylink.c
++++ b/drivers/net/phy/phylink.c
+@@ -60,6 +60,9 @@ struct phylink {
+ 	struct work_struct resolve;
+ 
+ 	bool mac_link_up;
++
++	const struct phylink_module_ops *module_ops;
++	void *module_data;
+ };
+ 
+ static const char *phylink_an_mode_str(unsigned int mode)
+@@ -819,6 +822,36 @@ int phylink_ethtool_set_pauseparam(struc
+ }
+ EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam);
+ 
++int phylink_ethtool_get_module_info(struct phylink *pl,
++				    struct ethtool_modinfo *modinfo)
++{
++	int ret = -EOPNOTSUPP;
++
++	mutex_lock(&pl->config_mutex);
++	if (pl->module_ops)
++		ret = pl->module_ops->get_module_info(pl->module_data,
++						      modinfo);
++	mutex_unlock(&pl->config_mutex);
++
++	return ret;
++}
++EXPORT_SYMBOL_GPL(phylink_ethtool_get_module_info);
++
++int phylink_ethtool_get_module_eeprom(struct phylink *pl,
++				      struct ethtool_eeprom *ee, u8 *buf)
++{
++	int ret = -EOPNOTSUPP;
++
++	mutex_lock(&pl->config_mutex);
++	if (pl->module_ops)
++		ret = pl->module_ops->get_module_eeprom(pl->module_data, ee,
++							buf);
++	mutex_unlock(&pl->config_mutex);
++
++	return ret;
++}
++EXPORT_SYMBOL_GPL(phylink_ethtool_get_module_eeprom);
++
+ int phylink_init_eee(struct phylink *pl, bool clk_stop_enable)
+ {
+ 	int ret = -EPROTONOSUPPORT;
+@@ -1016,6 +1049,39 @@ EXPORT_SYMBOL_GPL(phylink_mii_ioctl);
+ 
+ 
+ 
++int phylink_register_module(struct phylink *pl, void *data,
++			    const struct phylink_module_ops *ops)
++{
++	int ret = -EBUSY;
++
++	mutex_lock(&pl->config_mutex);
++	if (!pl->module_ops) {
++		pl->module_ops = ops;
++		pl->module_data = data;
++		ret = 0;
++	}
++	mutex_unlock(&pl->config_mutex);
++
++	return ret;
++}
++EXPORT_SYMBOL_GPL(phylink_register_module);
++
++int phylink_unregister_module(struct phylink *pl, void *data)
++{
++	int ret = -EINVAL;
++
++	mutex_lock(&pl->config_mutex);
++	if (pl->module_data == data) {
++		pl->module_ops = NULL;
++		pl->module_data = NULL;
++		ret = 0;
++	}
++	mutex_unlock(&pl->config_mutex);
++
++	return ret;
++}
++EXPORT_SYMBOL_GPL(phylink_unregister_module);
++
+ void phylink_disable(struct phylink *pl)
+ {
+ 	set_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state);
+--- a/include/linux/phylink.h
++++ b/include/linux/phylink.h
+@@ -55,6 +55,11 @@ struct phylink_mac_ops {
+ 			    struct phy_device *);
+ };
+ 
++struct phylink_module_ops {
++	int (*get_module_info)(void *, struct ethtool_modinfo *);
++	int (*get_module_eeprom)(void *, struct ethtool_eeprom *, u8 *);
++};
++
+ struct phylink *phylink_create(struct net_device *, struct device_node *,
+ 	phy_interface_t iface, const struct phylink_mac_ops *ops);
+ void phylink_destroy(struct phylink *);
+@@ -75,12 +80,19 @@ void phylink_ethtool_get_pauseparam(stru
+ 				    struct ethtool_pauseparam *);
+ int phylink_ethtool_set_pauseparam(struct phylink *,
+ 				   struct ethtool_pauseparam *);
++int phylink_ethtool_get_module_info(struct phylink *, struct ethtool_modinfo *);
++int phylink_ethtool_get_module_eeprom(struct phylink *,
++				      struct ethtool_eeprom *, u8 *);
+ int phylink_init_eee(struct phylink *, bool);
+ int phylink_get_eee_err(struct phylink *);
+ int phylink_ethtool_get_eee(struct phylink *, struct ethtool_eee *);
+ int phylink_ethtool_set_eee(struct phylink *, struct ethtool_eee *);
+ int phylink_mii_ioctl(struct phylink *, struct ifreq *, int);
+ 
++int phylink_register_module(struct phylink *, void *,
++			    const struct phylink_module_ops *);
++int phylink_unregister_module(struct phylink *, void *);
++
+ void phylink_set_link_port(struct phylink *pl, u32 support, u8 port);
+ int phylink_set_link_an_mode(struct phylink *pl, unsigned int mode);
+ void phylink_disable(struct phylink *pl);