[PATCH net-next v2 0/2] net: dsa: mv88e6xxx: add Amethyst specific SMI GPIO function

[PATCH net-next v2 0/2] net: dsa: mv88e6xxx: add Amethyst specific SMI GPIO function

[Robert Marko]

Amethyst family (MV88E6191X/6193X/6393X) has a simplified SMI GPIO setting
via the Scratch and Misc register so it requires family specific function.

In the v1 review, Andrew pointed out that it would make sense to rename the
existing mv88e6xxx_g2_scratch_gpio_set_smi as it only works on the MV6390
family.

Changes in v2:
* Add rename of mv88e6xxx_g2_scratch_gpio_set_smi to
mv88e6390_g2_scratch_gpio_set_smi

Robert Marko (2):
  net: dsa: mv88e6xxx: rename mv88e6xxx_g2_scratch_gpio_set_smi
  net: dsa: mv88e6xxx: add Amethyst specific SMI GPIO function

 drivers/net/dsa/mv88e6xxx/chip.c            |  5 ++-
 drivers/net/dsa/mv88e6xxx/global2.h         |  4 ++-
 drivers/net/dsa/mv88e6xxx/global2_scratch.c | 35 +++++++++++++++++++--
 3 files changed, 40 insertions(+), 4 deletions(-)

-- 
2.43.2

[PATCH net-next v2 1/2] net: dsa: mv88e6xxx: rename mv88e6xxx_g2_scratch_gpio_set_smi

[Robert Marko]

The name mv88e6xxx_g2_scratch_gpio_set_smi is a bit ambiguous as it appears
to only be applicable to the 6390 family, so lets rename it to
mv88e6390_g2_scratch_gpio_set_smi to make it more obvious.

Signed-off-by: Robert Marko <robimarko@gmail.com>
---
 drivers/net/dsa/mv88e6xxx/chip.c            | 2 +-
 drivers/net/dsa/mv88e6xxx/global2.h         | 2 +-
 drivers/net/dsa/mv88e6xxx/global2_scratch.c | 4 ++--
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 9caecb4dfbfa..f9378fca8305 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -3712,7 +3712,7 @@ static int mv88e6xxx_mdio_register(struct mv88e6xxx_chip *chip,
 
 	if (external) {
 		mv88e6xxx_reg_lock(chip);
-		err = mv88e6xxx_g2_scratch_gpio_set_smi(chip, true);
+		err = mv88e6390_g2_scratch_gpio_set_smi(chip, true);
 		mv88e6xxx_reg_unlock(chip);
 
 		if (err)
diff --git a/drivers/net/dsa/mv88e6xxx/global2.h b/drivers/net/dsa/mv88e6xxx/global2.h
index d9434f7cae53..20fefa08f54e 100644
--- a/drivers/net/dsa/mv88e6xxx/global2.h
+++ b/drivers/net/dsa/mv88e6xxx/global2.h
@@ -378,7 +378,7 @@ extern const struct mv88e6xxx_avb_ops mv88e6390_avb_ops;
 
 extern const struct mv88e6xxx_gpio_ops mv88e6352_gpio_ops;
 
-int mv88e6xxx_g2_scratch_gpio_set_smi(struct mv88e6xxx_chip *chip,
+int mv88e6390_g2_scratch_gpio_set_smi(struct mv88e6xxx_chip *chip,
 				      bool external);
 int mv88e6352_g2_scratch_port_has_serdes(struct mv88e6xxx_chip *chip, int port);
 int mv88e6xxx_g2_atu_stats_set(struct mv88e6xxx_chip *chip, u16 kind, u16 bin);
diff --git a/drivers/net/dsa/mv88e6xxx/global2_scratch.c b/drivers/net/dsa/mv88e6xxx/global2_scratch.c
index a9d6e40321a2..0e15efd898f2 100644
--- a/drivers/net/dsa/mv88e6xxx/global2_scratch.c
+++ b/drivers/net/dsa/mv88e6xxx/global2_scratch.c
@@ -240,7 +240,7 @@ const struct mv88e6xxx_gpio_ops mv88e6352_gpio_ops = {
 };
 
 /**
- * mv88e6xxx_g2_scratch_gpio_set_smi - set gpio muxing for external smi
+ * mv88e6390_g2_scratch_gpio_set_smi - set gpio muxing for external smi
  * @chip: chip private data
  * @external: set mux for external smi, or free for gpio usage
  *
@@ -248,7 +248,7 @@ const struct mv88e6xxx_gpio_ops mv88e6352_gpio_ops = {
  * an external SMI interface, or they may be made free for other
  * GPIO uses.
  */
-int mv88e6xxx_g2_scratch_gpio_set_smi(struct mv88e6xxx_chip *chip,
+int mv88e6390_g2_scratch_gpio_set_smi(struct mv88e6xxx_chip *chip,
 				      bool external)
 {
 	int misc_cfg = MV88E6352_G2_SCRATCH_MISC_CFG;
-- 
2.43.2

[PATCH net-next v2 2/2] net: dsa: mv88e6xxx: add Amethyst specific SMI GPIO function

[Robert Marko]

The existing mv88e6390_g2_scratch_gpio_set_smi() cannot be used on the
88E6393X as it requires certain P0_MODE, it also checks the CPU mode
as it impacts the bit setting value.

This is all irrelevant for Amethyst (MV88E6191X/6193X/6393X) as only
the default value of the SMI_PHY Config bit is set to CPU_MGD bootstrap
pin value but it can be changed without restrictions so that GPIO pins
9 and 10 are used as SMI pins.

So, introduce Amethyst specific function and call that if the Amethyst
family wants to setup the external PHY.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Robert Marko <robimarko@gmail.com>
---
 drivers/net/dsa/mv88e6xxx/chip.c            |  5 +++-
 drivers/net/dsa/mv88e6xxx/global2.h         |  2 ++
 drivers/net/dsa/mv88e6xxx/global2_scratch.c | 31 +++++++++++++++++++++
 3 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index f9378fca8305..9ed1821184ec 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -3712,7 +3712,10 @@ static int mv88e6xxx_mdio_register(struct mv88e6xxx_chip *chip,
 
 	if (external) {
 		mv88e6xxx_reg_lock(chip);
-		err = mv88e6390_g2_scratch_gpio_set_smi(chip, true);
+		if (chip->info->family == MV88E6XXX_FAMILY_6393)
+			err = mv88e6393x_g2_scratch_gpio_set_smi(chip, true);
+		else
+			err = mv88e6390_g2_scratch_gpio_set_smi(chip, true);
 		mv88e6xxx_reg_unlock(chip);
 
 		if (err)
diff --git a/drivers/net/dsa/mv88e6xxx/global2.h b/drivers/net/dsa/mv88e6xxx/global2.h
index 20fefa08f54e..82f9b410de0b 100644
--- a/drivers/net/dsa/mv88e6xxx/global2.h
+++ b/drivers/net/dsa/mv88e6xxx/global2.h
@@ -380,6 +380,8 @@ extern const struct mv88e6xxx_gpio_ops mv88e6352_gpio_ops;
 
 int mv88e6390_g2_scratch_gpio_set_smi(struct mv88e6xxx_chip *chip,
 				      bool external);
+int mv88e6393x_g2_scratch_gpio_set_smi(struct mv88e6xxx_chip *chip,
+				       bool external);
 int mv88e6352_g2_scratch_port_has_serdes(struct mv88e6xxx_chip *chip, int port);
 int mv88e6xxx_g2_atu_stats_set(struct mv88e6xxx_chip *chip, u16 kind, u16 bin);
 int mv88e6xxx_g2_atu_stats_get(struct mv88e6xxx_chip *chip, u16 *stats);
diff --git a/drivers/net/dsa/mv88e6xxx/global2_scratch.c b/drivers/net/dsa/mv88e6xxx/global2_scratch.c
index 0e15efd898f2..61ab6cc4fbfc 100644
--- a/drivers/net/dsa/mv88e6xxx/global2_scratch.c
+++ b/drivers/net/dsa/mv88e6xxx/global2_scratch.c
@@ -290,6 +290,37 @@ int mv88e6390_g2_scratch_gpio_set_smi(struct mv88e6xxx_chip *chip,
 	return mv88e6xxx_g2_scratch_write(chip, misc_cfg, val);
 }
 
+/**
+ * mv88e6393x_g2_scratch_gpio_set_smi - set gpio muxing for external smi
+ * @chip: chip private data
+ * @external: set mux for external smi, or free for gpio usage
+ *
+ * MV88E6191X/6193X/6393X GPIO pins 9 and 10 can be configured as an
+ * external SMI interface or as regular GPIO-s.
+ *
+ * They however have a different register layout then the existing
+ * function.
+ */
+
+int mv88e6393x_g2_scratch_gpio_set_smi(struct mv88e6xxx_chip *chip,
+				       bool external)
+{
+	int misc_cfg = MV88E6352_G2_SCRATCH_MISC_CFG;
+	int err;
+	u8 val;
+
+	err = mv88e6xxx_g2_scratch_read(chip, misc_cfg, &val);
+	if (err)
+		return err;
+
+	if (external)
+		val &= ~MV88E6352_G2_SCRATCH_MISC_CFG_NORMALSMI;
+	else
+		val |= MV88E6352_G2_SCRATCH_MISC_CFG_NORMALSMI;
+
+	return mv88e6xxx_g2_scratch_write(chip, misc_cfg, val);
+}
+
 /**
  * mv88e6352_g2_scratch_port_has_serdes - indicate if a port can have a serdes
  * @chip: chip private data
-- 
2.43.2

Re: [PATCH net-next v2 1/2] net: dsa: mv88e6xxx: rename mv88e6xxx_g2_scratch_gpio_set_smi

[Andrew Lunn]

On Tue, Feb 27, 2024 at 06:54:21PM +0100, Robert Marko wrote:
> The name mv88e6xxx_g2_scratch_gpio_set_smi is a bit ambiguous as it appears
> to only be applicable to the 6390 family, so lets rename it to
> mv88e6390_g2_scratch_gpio_set_smi to make it more obvious.
> 
> Signed-off-by: Robert Marko <robimarko@gmail.com>

Reviewed-by: Andrew Lunn <andrew@lunn.ch>

    Andrew

Re: [PATCH net-next v2 0/2] net: dsa: mv88e6xxx: add Amethyst specific SMI GPIO function

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (main)
by Paolo Abeni <pabeni@redhat.com>:

On Tue, 27 Feb 2024 18:54:20 +0100 you wrote:
> Amethyst family (MV88E6191X/6193X/6393X) has a simplified SMI GPIO setting
> via the Scratch and Misc register so it requires family specific function.
> 
> In the v1 review, Andrew pointed out that it would make sense to rename the
> existing mv88e6xxx_g2_scratch_gpio_set_smi as it only works on the MV6390
> family.
> 
> [...]

Here is the summary with links:
  - [net-next,v2,1/2] net: dsa: mv88e6xxx: rename mv88e6xxx_g2_scratch_gpio_set_smi
    https://git.kernel.org/netdev/net-next/c/5c5b0c444be3
  - [net-next,v2,2/2] net: dsa: mv88e6xxx: add Amethyst specific SMI GPIO function
    https://git.kernel.org/netdev/net-next/c/e3ab3267a0bb

You are awesome, thank you!
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