From the validate docs in include/linux/phylink.h:

 When state->interface is PHY_INTERFACE_MODE_NA, phylink expects the
 MAC driver to return all supported link modes.

Tested-by: Birger Koblitz <[email protected]>
Signed-off-by: Bjørn Mork <[email protected]>
---
 target/linux/realtek/files-5.4/drivers/net/dsa/rtl83xx/dsa.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/linux/realtek/files-5.4/drivers/net/dsa/rtl83xx/dsa.c 
b/target/linux/realtek/files-5.4/drivers/net/dsa/rtl83xx/dsa.c
index af6d92cbc221..2c49ea27a167 100644
--- a/target/linux/realtek/files-5.4/drivers/net/dsa/rtl83xx/dsa.c
+++ b/target/linux/realtek/files-5.4/drivers/net/dsa/rtl83xx/dsa.c
@@ -245,6 +245,7 @@ static void rtl83xx_phylink_validate(struct dsa_switch *ds, 
int port,
        pr_debug("In %s port %d", __func__, port);
 
        if (!phy_interface_mode_is_rgmii(state->interface) &&
+           state->interface != PHY_INTERFACE_MODE_NA &&
            state->interface != PHY_INTERFACE_MODE_1000BASEX &&
            state->interface != PHY_INTERFACE_MODE_MII &&
            state->interface != PHY_INTERFACE_MODE_REVMII &&
-- 
2.20.1


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