net: dsa: lantiq_gswip: add vendor property to setup MII refclk output

Read boolean Device Tree property "maxlinear,rmii-refclk-out" and switch
the RMII reference clock to be a clock output rather than an input if it
is set.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@siemens.com>
Tested-by: Alexander Sverdlin <alexander.sverdlin@siemens.com>
Link: https://patch.msgid.link/947d14970f74f760e4a60c777aabee64e7e4f356.1762170107.git.daniel@makrotopia.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/dsa/lantiq/lantiq_gswip_common.c b/drivers/net/dsa/lantiq/lantiq_gswip_common.c
index fdfc265b4c73752af52788e91847adb6b75c5b49..7b3debd45b9167ce9a32db10bbf20eda32d02163 100644 (file)
--- a/drivers/net/dsa/lantiq/lantiq_gswip_common.c
+++ b/drivers/net/dsa/lantiq/lantiq_gswip_common.c
@@ -1402,6 +1402,8 @@ static void gswip_phylink_mac_config(struct phylink_config *config,
                break;
        case PHY_INTERFACE_MODE_RMII:
                miicfg |= GSWIP_MII_CFG_MODE_RMIIM;
+               if (of_property_read_bool(dp->dn, "maxlinear,rmii-refclk-out"))
+                       miicfg |= GSWIP_MII_CFG_RMII_CLK;
                break;
        case PHY_INTERFACE_MODE_RGMII:
        case PHY_INTERFACE_MODE_RGMII_ID: