Commit 728c2af6 authored by Alexander Couzens's avatar Alexander Couzens Committed by Jakub Kicinski
Browse files

net: mt7531: ensure all MACs are powered down before reset 



The datasheet [1] explicit describes it as requirement for a reset.

[1] MT7531 Reference Manual for Development Board rev 1.0, page 735

Signed-off-by: default avatarAlexander Couzens <lynxis@fe80.eu>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 42bc4faf

drivers/net/dsa/mt7530.c

+4 −0
Original line number Diff line number Diff line
@@ -2329,6 +2329,10 @@ mt7531_setup(struct dsa_switch *ds) 
		return -ENODEV;

	}



	/* all MACs must be forced link-down before sw reset */

	for (i = 0; i < MT7530_NUM_PORTS; i++)

		mt7530_write(priv, MT7530_PMCR_P(i), MT7531_FORCE_LNK);



	/* Reset the switch through internal reset */

	mt7530_write(priv, MT7530_SYS_CTRL,

		     SYS_CTRL_PHY_RST | SYS_CTRL_SW_RST |