net: dsa: qca8k: move qca8k bulk read/write helper to common code

The same ATU function are used by drivers based on qca8k family switch.
Move the bulk read/write helper to common code to declare these shared
ATU functions in common code.
These helper will be dropped when regmap correctly support bulk
read/write.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/dsa/qca/qca8k-8xxx.c

@@ -342,43 +342,6 @@ qca8k_regmap_update_bits_eth(struct qca8k_priv *priv, u32 reg, u32 mask, u32 wri
 	return qca8k_write_eth(priv, reg, &val, sizeof(val));
 }
 
-static int
-qca8k_bulk_read(struct qca8k_priv *priv, u32 reg, u32 *val, int len)
-{
-	int i, count = len / sizeof(u32), ret;
-
-	if (priv->mgmt_master && !qca8k_read_eth(priv, reg, val, len))
-		return 0;
-
-	for (i = 0; i < count; i++) {
-		ret = regmap_read(priv->regmap, reg + (i * 4), val + i);
-		if (ret < 0)
-			return ret;
-	}
-
-	return 0;
-}
-
-static int
-qca8k_bulk_write(struct qca8k_priv *priv, u32 reg, u32 *val, int len)
-{
-	int i, count = len / sizeof(u32), ret;
-	u32 tmp;
-
-	if (priv->mgmt_master && !qca8k_write_eth(priv, reg, val, len))
-		return 0;
-
-	for (i = 0; i < count; i++) {
-		tmp = val[i];
-
-		ret = regmap_write(priv->regmap, reg + (i * 4), tmp);
-		if (ret < 0)
-			return ret;
-	}
-
-	return 0;
-}
-
 static int
 qca8k_regmap_read(void *ctx, uint32_t reg, uint32_t *val)
 {
@@ -3152,6 +3115,8 @@ static SIMPLE_DEV_PM_OPS(qca8k_pm_ops,
 
 static const struct qca8k_info_ops qca8xxx_ops = {
 	.autocast_mib = qca8k_get_ethtool_stats_eth,
+	.read_eth = qca8k_read_eth,
+	.write_eth = qca8k_write_eth,
 };
 
 static const struct qca8k_match_data qca8327 = {

drivers/net/dsa/qca/qca8k-common.c

@@ -99,3 +99,42 @@ const struct regmap_access_table qca8k_readable_table = {
 	.yes_ranges = qca8k_readable_ranges,
 	.n_yes_ranges = ARRAY_SIZE(qca8k_readable_ranges),
 };
+
+/* TODO: remove these extra ops when we can support regmap bulk read/write */
+int qca8k_bulk_read(struct qca8k_priv *priv, u32 reg, u32 *val, int len)
+{
+	int i, count = len / sizeof(u32), ret;
+
+	if (priv->mgmt_master && priv->info->ops->read_eth &&
+	    !priv->info->ops->read_eth(priv, reg, val, len))
+		return 0;
+
+	for (i = 0; i < count; i++) {
+		ret = regmap_read(priv->regmap, reg + (i * 4), val + i);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+/* TODO: remove these extra ops when we can support regmap bulk read/write */
+int qca8k_bulk_write(struct qca8k_priv *priv, u32 reg, u32 *val, int len)
+{
+	int i, count = len / sizeof(u32), ret;
+	u32 tmp;
+
+	if (priv->mgmt_master && priv->info->ops->write_eth &&
+	    !priv->info->ops->write_eth(priv, reg, val, len))
+		return 0;
+
+	for (i = 0; i < count; i++) {
+		tmp = val[i];
+
+		ret = regmap_write(priv->regmap, reg + (i * 4), tmp);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}

drivers/net/dsa/qca/qca8k.h

@@ -324,8 +324,13 @@ enum qca8k_mid_cmd {
 	QCA8K_MIB_CAST = 3,
 };
 
+struct qca8k_priv;
+
 struct qca8k_info_ops {
 	int (*autocast_mib)(struct dsa_switch *ds, int port, u64 *data);
+	/* TODO: remove these extra ops when we can support regmap bulk read/write */
+	int (*read_eth)(struct qca8k_priv *priv, u32 reg, u32 *val, int len);
+	int (*write_eth)(struct qca8k_priv *priv, u32 reg, u32 *val, int len);
 };
 
 struct qca8k_match_data {
@@ -431,4 +436,7 @@ int qca8k_read(struct qca8k_priv *priv, u32 reg, u32 *val);
 int qca8k_write(struct qca8k_priv *priv, u32 reg, u32 val);
 int qca8k_rmw(struct qca8k_priv *priv, u32 reg, u32 mask, u32 write_val);
 
+int qca8k_bulk_read(struct qca8k_priv *priv, u32 reg, u32 *val, int len);
+int qca8k_bulk_write(struct qca8k_priv *priv, u32 reg, u32 *val, int len);
+
 #endif /* __QCA8K_H */