generic: 5.15: qca8k: backport code split patch

Backport upstream code split patch for qca8k needed for ipq40xx target
to correctly implement a DSA driver.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

1 files changed, 137 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.15/771-v6.0-06-net-dsa-qca8k-move-mib-init-function-to-common-code.patch b/target/linux/generic/backport-5.15/771-v6.0-06-net-dsa-qca8k-move-mib-init-function-to-common-code.patch
new file mode 100644
index 0000000000..a39a55b89b
--- /dev/null
+++ b/target/linux/generic/backport-5.15/771-v6.0-06-net-dsa-qca8k-move-mib-init-function-to-common-code.patch
@@ -0,0 +1,137 @@
+From fce1ec0c4e2d03d9c62ffc615a42bdba78eb4c14 Mon Sep 17 00:00:00 2001
+From: Christian Marangi <ansuelsmth@gmail.com>
+Date: Wed, 27 Jul 2022 13:35:15 +0200
+Subject: [PATCH 06/14] net: dsa: qca8k: move mib init function to common code
+
+The same mib function is used by drivers based on qca8k family switch.
+Move it to common code to make it accessible also by other drivers.
+
+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   | 37 ------------------------------
+ drivers/net/dsa/qca/qca8k-common.c | 35 ++++++++++++++++++++++++++++
+ drivers/net/dsa/qca/qca8k.h        |  4 ++++
+ 3 files changed, 39 insertions(+), 37 deletions(-)
+
+--- a/drivers/net/dsa/qca/qca8k-8xxx.c
++++ b/drivers/net/dsa/qca/qca8k-8xxx.c
+@@ -442,15 +442,6 @@ static struct regmap_config qca8k_regmap
+ };
+ 
+ static int
+-qca8k_busy_wait(struct qca8k_priv *priv, u32 reg, u32 mask)
+-{
+-	u32 val;
+-
+-	return regmap_read_poll_timeout(priv->regmap, reg, val, !(val & mask), 0,
+-				       QCA8K_BUSY_WAIT_TIMEOUT * USEC_PER_MSEC);
+-}
+-
+-static int
+ qca8k_fdb_read(struct qca8k_priv *priv, struct qca8k_fdb *fdb)
+ {
+ 	u32 reg[3];
+@@ -777,34 +768,6 @@ out:
+ 	return ret;
+ }
+ 
+-static int
+-qca8k_mib_init(struct qca8k_priv *priv)
+-{
+-	int ret;
+-
+-	mutex_lock(&priv->reg_mutex);
+-	ret = regmap_update_bits(priv->regmap, QCA8K_REG_MIB,
+-				 QCA8K_MIB_FUNC | QCA8K_MIB_BUSY,
+-				 FIELD_PREP(QCA8K_MIB_FUNC, QCA8K_MIB_FLUSH) |
+-				 QCA8K_MIB_BUSY);
+-	if (ret)
+-		goto exit;
+-
+-	ret = qca8k_busy_wait(priv, QCA8K_REG_MIB, QCA8K_MIB_BUSY);
+-	if (ret)
+-		goto exit;
+-
+-	ret = regmap_set_bits(priv->regmap, QCA8K_REG_MIB, QCA8K_MIB_CPU_KEEP);
+-	if (ret)
+-		goto exit;
+-
+-	ret = qca8k_write(priv, QCA8K_REG_MODULE_EN, QCA8K_MODULE_EN_MIB);
+-
+-exit:
+-	mutex_unlock(&priv->reg_mutex);
+-	return ret;
+-}
+-
+ static void
+ qca8k_port_set_status(struct qca8k_priv *priv, int port, int enable)
+ {
+--- a/drivers/net/dsa/qca/qca8k-common.c
++++ b/drivers/net/dsa/qca/qca8k-common.c
+@@ -7,6 +7,7 @@
+  */
+ 
+ #include <linux/netdevice.h>
++#include <linux/bitfield.h>
+ #include <net/dsa.h>
+ 
+ #include "qca8k.h"
+@@ -138,3 +139,38 @@ int qca8k_bulk_write(struct qca8k_priv *
+ 
+ 	return 0;
+ }
++
++int qca8k_busy_wait(struct qca8k_priv *priv, u32 reg, u32 mask)
++{
++	u32 val;
++
++	return regmap_read_poll_timeout(priv->regmap, reg, val, !(val & mask), 0,
++				       QCA8K_BUSY_WAIT_TIMEOUT * USEC_PER_MSEC);
++}
++
++int qca8k_mib_init(struct qca8k_priv *priv)
++{
++	int ret;
++
++	mutex_lock(&priv->reg_mutex);
++	ret = regmap_update_bits(priv->regmap, QCA8K_REG_MIB,
++				 QCA8K_MIB_FUNC | QCA8K_MIB_BUSY,
++				 FIELD_PREP(QCA8K_MIB_FUNC, QCA8K_MIB_FLUSH) |
++				 QCA8K_MIB_BUSY);
++	if (ret)
++		goto exit;
++
++	ret = qca8k_busy_wait(priv, QCA8K_REG_MIB, QCA8K_MIB_BUSY);
++	if (ret)
++		goto exit;
++
++	ret = regmap_set_bits(priv->regmap, QCA8K_REG_MIB, QCA8K_MIB_CPU_KEEP);
++	if (ret)
++		goto exit;
++
++	ret = qca8k_write(priv, QCA8K_REG_MODULE_EN, QCA8K_MODULE_EN_MIB);
++
++exit:
++	mutex_unlock(&priv->reg_mutex);
++	return ret;
++}
+--- a/drivers/net/dsa/qca/qca8k.h
++++ b/drivers/net/dsa/qca/qca8k.h
+@@ -422,6 +422,7 @@ struct qca8k_fdb {
+ /* Common setup function */
+ extern const struct qca8k_mib_desc ar8327_mib[];
+ extern const struct regmap_access_table qca8k_readable_table;
++int qca8k_mib_init(struct qca8k_priv *priv);
+ 
+ /* Common read/write/rmw function */
+ int qca8k_read(struct qca8k_priv *priv, u32 reg, u32 *val);
+@@ -431,4 +432,7 @@ int qca8k_rmw(struct qca8k_priv *priv, u
+ 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);
+ 
++/* Common ops function */
++int qca8k_busy_wait(struct qca8k_priv *priv, u32 reg, u32 mask);
++
+ #endif /* __QCA8K_H */