drivers: net: aquantia: set SMBus addr based on DT property
Aquantia PHYs have a SMBus interface mostly used for debug. The addresses
on this interface are normally set up by PHY firmware, but depending on the
board they may end up not being unique. Add an optional DT property used
to change SMBus address if needed.
Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/drivers/net/phy/aquantia.c b/drivers/net/phy/aquantia.c
index 3b036d0..3992a97 100644
--- a/drivers/net/phy/aquantia.c
+++ b/drivers/net/phy/aquantia.c
@@ -94,6 +94,9 @@
#define AQUANTIA_VND1_GSYSCFG_5G 3
#define AQUANTIA_VND1_GSYSCFG_10G 4
+#define AQUANTIA_VND1_SMBUS0 0xc485
+#define AQUANTIA_VND1_SMBUS1 0xc495
+
/* addresses of memory segments in the phy */
#define DRAM_BASE_ADDR 0x3FFE0000
#define IRAM_BASE_ADDR 0x40000000
@@ -355,6 +358,18 @@
phy_write(phydev, MDIO_MMD_PMAPMD, AQUANTIA_PMA_RX_VENDOR_P1,
reg);
}
+ if (!ofnode_read_u32(node, "smb-addr", &prop)) {
+ debug("smb-addr = %x\n", (int)prop);
+ /*
+ * there are two addresses here, normally just one bus would
+ * be in use so we're setting both regs using the same DT
+ * property.
+ */
+ phy_write(phydev, MDIO_MMD_VEND1, AQUANTIA_VND1_SMBUS0,
+ (u16)(prop << 1));
+ phy_write(phydev, MDIO_MMD_VEND1, AQUANTIA_VND1_SMBUS1,
+ (u16)(prop << 1));
+ }
#endif
return 0;