netdev - [RFC PATCH net-next v3 02/15] net: dsa: mt7530: use unlocked regmap accessors

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Message-ID: <1b79468f3043810ff8ec06a66cf8571738a13f72.1680105013.git.daniel@makrotopia.org>
Date:   Wed, 29 Mar 2023 16:57:32 +0100
From:   Daniel Golle <daniel@...rotopia.org>
To:     netdev@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>,
        Philipp Zabel <p.zabel@...gutronix.de>
Cc:     Sam Shih <Sam.Shih@...iatek.com>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        John Crispin <john@...ozen.org>, Felix Fietkau <nbd@....name>
Subject: [RFC PATCH net-next v3 02/15] net: dsa: mt7530: use unlocked regmap
 accessors

Instead of wrapping the locked register accessor functions, use the
unlocked variants and add wrappers to let regmap handle the locking.
This is a preparation towards being able to always use regmap to
access switch registers instead of open-coded accessor functions.

Signed-off-by: Daniel Golle <daniel@...rotopia.org>
---
 drivers/net/dsa/mt7530.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 9b88ce5cee5bd..deb0b338b22c2 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -2899,7 +2899,7 @@ static int mt7530_regmap_read(void *context, unsigned int reg, unsigned int *val
 {
 	struct mt7530_priv *priv = context;
 
-	*val = mt7530_read(priv, reg);
+	*val = mt7530_mii_read(priv, reg);
 	return 0;
 };
 
@@ -2907,23 +2907,25 @@ static int mt7530_regmap_write(void *context, unsigned int reg, unsigned int val
 {
 	struct mt7530_priv *priv = context;
 
-	mt7530_write(priv, reg, val);
+	mt7530_mii_write(priv, reg, val);
 	return 0;
 };
 
-static int mt7530_regmap_update_bits(void *context, unsigned int reg,
-				     unsigned int mask, unsigned int val)
+static void
+mt7530_mdio_regmap_lock(void *mdio_lock)
 {
-	struct mt7530_priv *priv = context;
+	mutex_lock_nested(mdio_lock, MDIO_MUTEX_NESTED);
+}
 
-	mt7530_rmw(priv, reg, mask, val);
-	return 0;
-};
+static void
+mt7530_mdio_regmap_unlock(void *mdio_lock)
+{
+	mutex_unlock(mdio_lock);
+}
 
 static const struct regmap_bus mt7531_regmap_bus = {
 	.reg_write = mt7530_regmap_write,
 	.reg_read = mt7530_regmap_read,
-	.reg_update_bits = mt7530_regmap_update_bits,
 };
 
 static int
@@ -2949,6 +2951,9 @@ mt7531_create_sgmii(struct mt7530_priv *priv)
 		mt7531_pcs_config[i]->reg_stride = 4;
 		mt7531_pcs_config[i]->reg_base = MT7531_SGMII_REG_BASE(5 + i);
 		mt7531_pcs_config[i]->max_register = 0x17c;
+		mt7531_pcs_config[i]->lock = mt7530_mdio_regmap_lock;
+		mt7531_pcs_config[i]->unlock = mt7530_mdio_regmap_unlock;
+		mt7531_pcs_config[i]->lock_arg = &priv->bus->mdio_lock;
 
 		regmap = devm_regmap_init(priv->dev,
 					  &mt7531_regmap_bus, priv,
-- 
2.39.2