openwrt/target/linux/generic/pending-5.15/723-net-mt7531-ensure-all-MACs-are-powered-down-before-r.patch

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From 3fb8841513c4ec3a2e5d366df86230c45f239a57 Mon Sep 17 00:00:00 2001
From: Alexander Couzens <lynxis@fe80.eu>
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 <lynxis@fe80.eu>
---
kernel: bump 5.15 to 5.15.115 Manually rebased: backport-5.15/603-v5.19-page_pool-Add-recycle-stats-to-page_pool_put_page_bu.patch pending-5.15/723-net-mt7531-ensure-all-MACs-are-powered-down-before-r.patch* Removed upstreamed: generic-backport/610-v6.3-net-page_pool-use-in_softirq-instead.patch[1] backport-5.15/705-12-v6.0-net-dsa-mt7530-rework-mt753-01-_setup.patch[2] backport-5.15/790-v6.4-0010-net-dsa-mt7530-split-off-common-parts-from-mt7531_se.patch[3] backport-5.15/703-10-v5.16-net-dsa-introduce-helpers-for-iterating-through-port.patch[4] All other patches automatically rebased. * Modified to define the variable i as suggested by DragonBluep in PR discussion. See: https://github.com/openwrt/openwrt/pull/12823#issuecomment-1578518576 1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.115&id=3af319d5147454dc63665ef451229c674b538377 2. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.115&id=0753c1ef24194580f7165ae6e259b59a851392f2 3. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.115&id=5a7266feaa6d708fc6880a161786eaa884ef3c8e 4. https://github.com/gregkh/linux/commit/9902f91cf666124a6b50bbcf483b46ecb09ef408 Build system: x86_64 Build-tested: bcm2711/RPi4B, ramips/tplink_archer-a6-v3, filogic/xiaomi_redmi-router-ax6000-ubootmod Run-tested: bcm2711/RPi4B, ramips/tplink_archer-a6-v3, filogic/xiaomi_redmi-router-ax6000-ubootmod Signed-off-by: John Audia <therealgraysky@proton.me>
2023-06-06 14:45:47 +00:00
drivers/net/dsa/mt7530.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -2680,6 +2680,10 @@ 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 |