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@xxxxxxxxxxx>
---
drivers/net/dsa/microchip/ksz8795.c | 5 +++++
drivers/net/dsa/microchip/ksz8795_reg.h | 3 +++
drivers/net/dsa/microchip/ksz_common.c | 3 +++
drivers/net/dsa/microchip/ksz_common.h | 1 +
4 files changed, 12 insertions(+)
diff --git a/drivers/net/dsa/microchip/ksz8795.c b/drivers/net/dsa/microchip/ksz8795.c
index 91aba470fb2f..78f3a668aa99 100644
--- a/drivers/net/dsa/microchip/ksz8795.c
+++ b/drivers/net/dsa/microchip/ksz8795.c
@@ -1434,6 +1434,11 @@ int ksz8_setup(struct dsa_switch *ds)
for (i = 0; i < (dev->info->num_vlans / 4); i++)
ksz8_r_vlan_entries(dev, i);
+ if (ksz_is_ksz88x3(dev))
+ ksz_cfg(dev, KSZ88X3_REG_FVID_AND_HOST_MODE,
+ KSZ88X3_PORT3_RMII_CLK_INTERNAL,
+ dev->rmii_clk_internal);
+
return ksz8_handle_global_errata(ds);
}
diff --git a/drivers/net/dsa/microchip/ksz8795_reg.h b/drivers/net/dsa/microchip/ksz8795_reg.h
index 3c9dae53e4d8..beca974e0171 100644
--- a/drivers/net/dsa/microchip/ksz8795_reg.h
+++ b/drivers/net/dsa/microchip/ksz8795_reg.h
@@ -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)
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index b800ace40ce1..0a0a53ce5b1b 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -4160,6 +4160,9 @@ int ksz_switch_register(struct ksz_device *dev)
}
}
+ dev->rmii_clk_internal = of_property_read_bool(dev->dev->of_node,
+ "microchip,rmii-clk-internal");
+
ret = dsa_register_switch(dev->ds);
if (ret) {
dev->dev_ops->exit(dev);
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index 8842efca0871..e5b0445fe2ca 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -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;
--
2.11.0
