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net: dsa: Add new binding implementation

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The existing DSA binding has a number of limitations and problems. The
main problem is that it cannot represent a switch as a linux device,
hanging off some bus. It is limited to one CPU port. The DSA platform
device is artificial, and does not really represent hardware.

Implement a new binding which can be embedded into any type of node on
a bus to represent one switch device, and its links to other switches.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn 2016-06-04 21:17:07 +02:00 • committed by David S. Miller
parent b516d45323
commit 83c0afaec7
7 changed files with 694 additions and 4 deletions
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20
include/net/dsa.h
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@ -85,6 +85,17 @@ struct dsa_platform_data {
struct packet_type;
struct dsa_switch_tree {
struct list_head list;
/* Tree identifier */
u32 tree;
/* Number of switches attached to this tree */
struct kref refcount;
/* Has this tree been applied to the hardware? */
bool applied;
/*
* Configuration data for the platform device that owns
* this dsa switch tree instance.
@ -169,10 +180,16 @@ struct dsa_switch {
struct device *hwmon_dev;
#endif
/*
* The lower device this switch uses to talk to the host
*/
struct net_device *master_netdev;
/*
* Slave mii_bus and devices for the individual ports.
*/
u32 dsa_port_mask;
u32 cpu_port_mask;
u32 enabled_port_mask;
u32 phys_mii_mask;
struct dsa_port ports[DSA_MAX_PORTS];
@ -361,4 +378,7 @@ static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst)
{
return dst->rcv != NULL;
}
void dsa_unregister_switch(struct dsa_switch *ds);
int dsa_register_switch(struct dsa_switch *ds, struct device_node *np);
#endif