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401a6ccfaf
Backport lots upstream changes, many of them fixes, for the mt7530 DSA driver. Some of them may or may not find they way into Linux 6.1 stable, some certainly won't because they are fixes for backported commits which aren't even present in Linux 6.1 upstream. Apart from adding new patches, also remove mutated patch 723-net-mt7531-ensure-all-MACs-are-powered-down-before-r.patch which should never have been added for Linux 6.1 -- it was applied already upstream but coincidentally would fuzzy-apply in the wrong place as well (for MT7530 instead of MT7531). While that didn't really hurt anyone it is just unneeded. The other deleted patch 795-mt7530-register-OF-node-for-internal-MDIO-bus.patch has been replaced by an equivalent commit with a more complete patch description by upstream maintainer Arınç Ünal. The remaining differences compared to the upstream driver are: * C22/C45 MDIO ops aren't split Upstream did that, backporting it would require making changes to *all* DSA drivers * 'slave' -> 'user', 'master' -> 'conduit' language change in DSA * support for selecting preferred CPU port on MT7531 Also this would require too many DSA framework changes potentially affecting other devices. If we ever really use Linux 6.1 in a release (I hope not) we can still reconsider to make the effort to backport that. In addition to some minor bug fixes and style improvements the switch should now behave more conformant when it comes to link-local frames, and we will again be able to cleanly pick patches from upstream. MAINTAIERS NOTE: Three patches are already part of Linux stable and should be removed with the next minor kernel version bump: 789-STABLE-01-net-dsa-mt7530-prevent-possible-incorrect-XTAL-frequ.patch 789-STABLE-02-net-dsa-mt7530-fix-link-local-frames-that-ingress-vl.patch 789-STABLE-03-net-dsa-mt7530-fix-handling-of-all-link-local-frames.patch Signed-off-by: Daniel Golle <daniel@makrotopia.org>
75 lines
2.2 KiB
Diff
75 lines
2.2 KiB
Diff
From efb41b8e9b7bbb08ace1930373bff63d4f5cc6e2 Mon Sep 17 00:00:00 2001
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From: Daniel Golle <daniel@makrotopia.org>
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Date: Mon, 3 Apr 2023 02:17:40 +0100
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Subject: [PATCH 05/48] net: dsa: mt7530: use unlocked regmap accessors
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Instead of wrapping the locked register accessor functions, use the
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unlocked variants and add locking wrapper functions to let regmap
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handle the locking.
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This is a preparation towards being able to always use regmap to
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access switch registers instead of open-coded accessor functions.
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Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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Reviewed-by: Andrew Lunn <andrew@lunn.ch>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/dsa/mt7530.c | 23 ++++++++++++++---------
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1 file changed, 14 insertions(+), 9 deletions(-)
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--- a/drivers/net/dsa/mt7530.c
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+++ b/drivers/net/dsa/mt7530.c
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@@ -2974,7 +2974,7 @@ static int mt7530_regmap_read(void *cont
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{
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struct mt7530_priv *priv = context;
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- *val = mt7530_read(priv, reg);
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+ *val = mt7530_mii_read(priv, reg);
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return 0;
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};
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@@ -2982,23 +2982,25 @@ static int mt7530_regmap_write(void *con
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{
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struct mt7530_priv *priv = context;
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- mt7530_write(priv, reg, val);
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+ mt7530_mii_write(priv, reg, val);
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return 0;
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};
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-static int mt7530_regmap_update_bits(void *context, unsigned int reg,
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- unsigned int mask, unsigned int val)
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+static void
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+mt7530_mdio_regmap_lock(void *mdio_lock)
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{
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- struct mt7530_priv *priv = context;
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+ mutex_lock_nested(mdio_lock, MDIO_MUTEX_NESTED);
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+}
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- mt7530_rmw(priv, reg, mask, val);
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- return 0;
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-};
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+static void
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+mt7530_mdio_regmap_unlock(void *mdio_lock)
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+{
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+ mutex_unlock(mdio_lock);
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+}
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static const struct regmap_bus mt7531_regmap_bus = {
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.reg_write = mt7530_regmap_write,
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.reg_read = mt7530_regmap_read,
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- .reg_update_bits = mt7530_regmap_update_bits,
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};
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static int
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@@ -3024,6 +3026,9 @@ mt7531_create_sgmii(struct mt7530_priv *
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mt7531_pcs_config[i]->reg_stride = 4;
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mt7531_pcs_config[i]->reg_base = MT7531_SGMII_REG_BASE(5 + i);
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mt7531_pcs_config[i]->max_register = 0x17c;
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+ mt7531_pcs_config[i]->lock = mt7530_mdio_regmap_lock;
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+ mt7531_pcs_config[i]->unlock = mt7530_mdio_regmap_unlock;
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+ mt7531_pcs_config[i]->lock_arg = &priv->bus->mdio_lock;
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regmap = devm_regmap_init(priv->dev,
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&mt7531_regmap_bus, priv,
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