Commit bf177449 authored by Arınç ÜNAL's avatar Arınç ÜNAL Committed by David S. Miller
Browse files

net: dsa: mt7530: explain exposing MDIO bus of MT7531AE better 



Unlike MT7531BE, the GPIO 6-12 pins are not used for RGMII on MT7531AE.
Therefore, the GPIO 11-12 pins are set to function as MDC and MDIO to
expose the MDIO bus of the switch. Replace the comment with a better
explanation.

Signed-off-by: default avatarArınç ÜNAL <arinc.unal@arinc9.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9df9aec1

drivers/net/dsa/mt7530.c

+4 −1
Original line number Diff line number Diff line
@@ -2635,7 +2635,10 @@ mt7531_setup(struct dsa_switch *ds) 
	if (!priv->p5_sgmii) {

		mt7531_pll_setup(priv);

	} else {

		/* Let ds->user_mii_bus be able to access external phy. */

		/* Unlike MT7531BE, the GPIO 6-12 pins are not used for RGMII on

		 * MT7531AE. Set the GPIO 11-12 pins to function as MDC and MDIO

		 * to expose the MDIO bus of the switch.

		 */

		mt7530_rmw(priv, MT7531_GPIO_MODE1, MT7531_GPIO11_RG_RXD2_MASK,

			   MT7531_EXT_P_MDC_11);

		mt7530_rmw(priv, MT7531_GPIO_MODE1, MT7531_GPIO12_RG_RXD3_MASK,