@@ -1312,8 +1312,16 @@ void ksz8_port_setup(struct ksz_device *dev, int port, bool cpu_port)
ksz_port_cfg(dev, port, P_PRIO_CTRL, PORT_802_1P_ENABLE, true);
if (cpu_port) {
- if (!ksz_is_ksz88x3(dev))
+ if (!ksz_is_ksz88x3(dev)) {
ksz8795_cpu_interface_select(dev, port);
+ } else {
+ dev->rmii_clk_internal = of_property_read_bool(dev->dev->of_node,
+ "microchip,rmii-clk-internal");
+
+ ksz_cfg(dev, KSZ88X3_REG_FVID_AND_HOST_MODE,
+ KSZ88X3_PORT3_RMII_CLK_INTERNAL,
+ dev->rmii_clk_internal);
+ }
member = dsa_user_ports(ds);
} else {
@@ -22,6 +22,9 @@
#define KSZ8863_GLOBAL_SOFTWARE_RESET BIT(4)
#define KSZ8863_PCS_RESET BIT(0)
+#define KSZ88X3_REG_FVID_AND_HOST_MODE 0xC6
+#define KSZ88X3_PORT3_RMII_CLK_INTERNAL BIT(3)
+
#define REG_SW_CTRL_0 0x02
#define SW_NEW_BACKOFF BIT(7)
@@ -163,6 +163,7 @@ struct ksz_device {
phy_interface_t compat_interface;
bool synclko_125;
bool synclko_disable;
+ bool rmii_clk_internal;
struct vlan_table *vlan_cache;
Microchip KSZ8863/KSZ8873 have the ability to select between internal and external RMII reference clock. By default, reference clock needs to be provided via REFCLKI_3 pin. If required, device can be setup to provide RMII clock internally so that REFCLKI_3 pin can be left unconnected. Add a new "microchip,rmii-clk-internal" property which will set RMII clock reference to internal. If property is not set, reference clock needs to be provided externally. Signed-off-by: Ante Knezic <ante.knezic@helmholz.de> --- drivers/net/dsa/microchip/ksz8795.c | 10 +++++++++- drivers/net/dsa/microchip/ksz8795_reg.h | 3 +++ drivers/net/dsa/microchip/ksz_common.h | 1 + 3 files changed, 13 insertions(+), 1 deletion(-)