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- From 3fb8841513c4ec3a2e5d366df86230c45f239a57 Mon Sep 17 00:00:00 2001
- From: Alexander Couzens <[email protected]>
- Date: Sat, 13 Aug 2022 13:08:22 +0200
- Subject: [PATCH 03/10] 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: Alexander Couzens <[email protected]>
- ---
- drivers/net/dsa/mt7530.c | 4 ++++
- 1 file changed, 4 insertions(+)
- --- a/drivers/net/dsa/mt7530.c
- +++ b/drivers/net/dsa/mt7530.c
- @@ -2252,6 +2252,10 @@ mt7530_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 |
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