@@ -16,6 +16,8 @@ Required properties:
Optional properties:
- reset-gpios : Should be a gpio specifier for a reset line
+- microchip,synclko-125 : Set if the output SYNCLKO frequency should be set to
+ 125MHz instead of 25MHz.
See Documentation/devicetree/bindings/net/dsa/dsa.txt for a list of additional
required and optional properties.
@@ -258,6 +258,10 @@ static int ksz9477_reset_switch(struct ksz_device *dev)
data16 |= (BROADCAST_STORM_VALUE * BROADCAST_STORM_PROT_RATE) / 100;
ksz_write16(dev, REG_SW_MAC_CTRL_2, data16);
+ if (dev->synclko_125)
+ ksz_write8(dev, REG_SW_GLOBAL_OUTPUT_CTRL__1,
+ SW_ENABLE_REFCLKO | SW_REFCLKO_IS_125MHZ);
+
return 0;
}
@@ -460,6 +460,8 @@ int ksz_switch_register(struct ksz_device *dev,
ret = of_get_phy_mode(dev->dev->of_node);
if (ret >= 0)
dev->interface = ret;
+ dev->synclko_125 = of_property_read_bool(dev->dev->of_node,
+ "microchip,synclko-125");
}
ret = dsa_register_switch(dev->ds);
@@ -78,6 +78,7 @@ struct ksz_device {
phy_interface_t interface;
u32 regs_size;
bool phy_errata_9477;
+ bool synclko_125;
struct vlan_table *vlan_cache;
The KSZ9477 series chips have a SYNCLKO pin which by default outputs a 25MHz clock, but some board setups require a 125MHz clock instead. Added a microchip,synclko-125 device tree property to allow indicating a 125MHz clock output is required. Signed-off-by: Robert Hancock <hancock@sedsystems.ca> --- Documentation/devicetree/bindings/net/dsa/ksz.txt | 2 ++ drivers/net/dsa/microchip/ksz9477.c | 4 ++++ drivers/net/dsa/microchip/ksz_common.c | 2 ++ drivers/net/dsa/microchip/ksz_priv.h | 1 + 4 files changed, 9 insertions(+)