net: dsa: Add support for switch EEPROM access

On some chips it is possible to access the switch eeprom.
Add infrastructure support for it.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 5edbbca89f1f..b51ef592f0a2 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -575,6 +575,7 @@ static int dsa_of_probe(struct platform_device *pdev)
         const char *port_name;
         int chip_index, port_index;
         const unsigned int *sw_addr, *port_reg;
+        u32 eeprom_len;
         int ret;
 
         mdio = of_parse_phandle(np, "dsa,mii-bus", 0);
@@ -626,6 +627,9 @@ static int dsa_of_probe(struct platform_device *pdev)
                 if (cd->sw_addr > PHY_MAX_ADDR)
                         continue;
 
+                if (!of_property_read_u32(np, "eeprom-length", &eeprom_len))
+                        cd->eeprom_len = eeprom_len;
+
                 for_each_available_child_of_node(child, port) {
                         port_reg = of_get_property(port, "reg", NULL);
                         if (!port_reg)