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Message-Id: <20240401-v6-8-0-net-next-mv88e6xxx-leds-v4-v3-6-221b3fa55f78@lunn.ch>
Date: Mon, 01 Apr 2024 08:35:51 -0500
From: Andrew Lunn <andrew@...n.ch>
To: 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>, 
 Russell King <linux@...linux.org.uk>, 
 Gregory Clement <gregory.clement@...tlin.com>
Cc: netdev@...r.kernel.org, Andrew Lunn <andrew@...n.ch>
Subject: [PATCH net-next v3 6/7] dsa: mv88e6xxx: Create port/netdev LEDs

Make use of the helpers to add LEDs to the user ports when the port is
setup.

Signed-off-by: Andrew Lunn <andrew@...n.ch>
---
 drivers/net/dsa/mv88e6xxx/Kconfig |   1 +
 drivers/net/dsa/mv88e6xxx/chip.c  | 117 +++++++++++++++++++++++++++++++++++++-
 drivers/net/dsa/mv88e6xxx/chip.h  |  12 ++++
 3 files changed, 129 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/mv88e6xxx/Kconfig b/drivers/net/dsa/mv88e6xxx/Kconfig
index e3181d5471df..ded5c6b9132b 100644
--- a/drivers/net/dsa/mv88e6xxx/Kconfig
+++ b/drivers/net/dsa/mv88e6xxx/Kconfig
@@ -5,6 +5,7 @@ config NET_DSA_MV88E6XXX
 	select IRQ_DOMAIN
 	select NET_DSA_TAG_EDSA
 	select NET_DSA_TAG_DSA
+	select NETDEV_LEDS
 	help
 	  This driver adds support for most of the Marvell 88E6xxx models of
 	  Ethernet switch chips, except 88E6060.
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 3d7e4aa9293a..b8e39dcad2da 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -31,6 +31,7 @@
 #include <linux/gpio/consumer.h>
 #include <linux/phylink.h>
 #include <net/dsa.h>
+#include <net/netdev_leds.h>
 
 #include "chip.h"
 #include "devlink.h"
@@ -3129,6 +3130,105 @@ static int mv88e6xxx_switch_reset(struct mv88e6xxx_chip *chip)
 	return mv88e6xxx_software_reset(chip);
 }
 
+static int mv88e6xxx_led_brightness_set(struct net_device *ndev,
+					u8 led, enum led_brightness value)
+{
+	struct dsa_switch *ds = dsa_user_to_ds(ndev);
+	struct mv88e6xxx_chip *chip = ds->priv;
+	int port = dsa_user_to_index(ndev);
+	int err;
+
+	if (chip->info->ops->led_brightness_set) {
+		mv88e6xxx_reg_lock(chip);
+		err = chip->info->ops->led_brightness_set(chip, port, led,
+							  value);
+		mv88e6xxx_reg_unlock(chip);
+		return err;
+	}
+	return -EOPNOTSUPP;
+}
+
+static int mv88e6xxx_led_blink_set(struct net_device *ndev, u8 led,
+				   unsigned long *delay_on,
+				   unsigned long *delay_off)
+{
+	struct dsa_switch *ds = dsa_user_to_ds(ndev);
+	struct mv88e6xxx_chip *chip = ds->priv;
+	int port = dsa_user_to_index(ndev);
+	int err;
+
+	if (chip->info->ops->led_blink_set) {
+		mv88e6xxx_reg_lock(chip);
+		err = chip->info->ops->led_blink_set(chip, port, led,
+						     delay_on, delay_off);
+		mv88e6xxx_reg_unlock(chip);
+		return err;
+	}
+	return -EOPNOTSUPP;
+}
+
+static int mv88e6xxx_led_hw_control_is_supported(struct net_device *ndev,
+						 u8 led, unsigned long flags)
+{
+	struct dsa_switch *ds = dsa_user_to_ds(ndev);
+	struct mv88e6xxx_chip *chip = ds->priv;
+	int port = dsa_user_to_index(ndev);
+	int err;
+
+	if (chip->info->ops->led_hw_control_is_supported) {
+		mv88e6xxx_reg_lock(chip);
+		err = chip->info->ops->led_hw_control_is_supported(chip, port,
+								   led, flags);
+		mv88e6xxx_reg_unlock(chip);
+		return err;
+	}
+	return -EOPNOTSUPP;
+}
+
+static int mv88e6xxx_led_hw_control_set(struct net_device *ndev, u8 led,
+					unsigned long flags)
+{
+	struct dsa_switch *ds = dsa_user_to_ds(ndev);
+	struct mv88e6xxx_chip *chip = ds->priv;
+	int port = dsa_user_to_index(ndev);
+	int err;
+
+	if (chip->info->ops->led_hw_control_set) {
+		mv88e6xxx_reg_lock(chip);
+		err = chip->info->ops->led_hw_control_set(chip, port,
+							  led, flags);
+		mv88e6xxx_reg_unlock(chip);
+		return err;
+	}
+	return -EOPNOTSUPP;
+}
+
+static int mv88e6xxx_led_hw_control_get(struct net_device *ndev,
+					u8 led, unsigned long *flags)
+{
+	struct dsa_switch *ds = dsa_user_to_ds(ndev);
+	struct mv88e6xxx_chip *chip = ds->priv;
+	int port = dsa_user_to_index(ndev);
+	int err;
+
+	if (chip->info->ops->led_hw_control_get) {
+		mv88e6xxx_reg_lock(chip);
+		err = chip->info->ops->led_hw_control_get(chip, port,
+							  led, flags);
+		mv88e6xxx_reg_unlock(chip);
+		return err;
+	}
+	return -EOPNOTSUPP;
+}
+
+static struct netdev_leds_ops mv88e6xxx_netdev_leds_ops = {
+	.brightness_set = mv88e6xxx_led_brightness_set,
+	.blink_set = mv88e6xxx_led_blink_set,
+	.hw_control_is_supported = mv88e6xxx_led_hw_control_is_supported,
+	.hw_control_set = mv88e6xxx_led_hw_control_set,
+	.hw_control_get = mv88e6xxx_led_hw_control_get,
+};
+
 static int mv88e6xxx_set_port_mode(struct mv88e6xxx_chip *chip, int port,
 				   enum mv88e6xxx_frame_mode frame,
 				   enum mv88e6xxx_egress_mode egress, u16 etype)
@@ -4006,6 +4106,7 @@ static int mv88e6xxx_setup(struct dsa_switch *ds)
 
 static int mv88e6xxx_port_setup(struct dsa_switch *ds, int port)
 {
+	struct dsa_port *dp = dsa_to_port(ds, port);
 	struct mv88e6xxx_chip *chip = ds->priv;
 	int err;
 
@@ -4016,13 +4117,26 @@ static int mv88e6xxx_port_setup(struct dsa_switch *ds, int port)
 			return err;
 	}
 
-	return mv88e6xxx_setup_devlink_regions_port(ds, port);
+	err  = mv88e6xxx_setup_devlink_regions_port(ds, port);
+	if (err)
+		return err;
+
+	if (dp->dn) {
+		err = netdev_leds_setup(dp->user, dp->dn, &chip->leds,
+					&mv88e6xxx_netdev_leds_ops, 2);
+		if (err)
+			mv88e6xxx_teardown_devlink_regions_port(ds, port);
+	}
+	return err;
 }
 
 static void mv88e6xxx_port_teardown(struct dsa_switch *ds, int port)
 {
+	struct dsa_port *dp = dsa_to_port(ds, port);
 	struct mv88e6xxx_chip *chip = ds->priv;
 
+	netdev_leds_teardown(&chip->leds, dp->user);
+
 	mv88e6xxx_teardown_devlink_regions_port(ds, port);
 
 	if (chip->info->ops->pcs_ops &&
@@ -6397,6 +6511,7 @@ static struct mv88e6xxx_chip *mv88e6xxx_alloc_chip(struct device *dev)
 	INIT_LIST_HEAD(&chip->mdios);
 	idr_init(&chip->policies);
 	INIT_LIST_HEAD(&chip->msts);
+	INIT_LIST_HEAD(&chip->leds);
 
 	return chip;
 }
diff --git a/drivers/net/dsa/mv88e6xxx/chip.h b/drivers/net/dsa/mv88e6xxx/chip.h
index 64f8bde68ccf..b70e74203b31 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.h
+++ b/drivers/net/dsa/mv88e6xxx/chip.h
@@ -432,6 +432,9 @@ struct mv88e6xxx_chip {
 
 	/* Bridge MST to SID mappings */
 	struct list_head msts;
+
+	/* LEDs associated to the ports */
+	struct list_head leds;
 };
 
 struct mv88e6xxx_bus_ops {
@@ -668,6 +671,15 @@ struct mv88e6xxx_ops {
 	int (*led_blink_set)(struct mv88e6xxx_chip *chip, int port, u8 led,
 			     unsigned long *delay_on,
 			     unsigned long *delay_off);
+	int (*led_hw_control_is_supported)(struct mv88e6xxx_chip *chip,
+					   int port, u8 led,
+					   unsigned long flags);
+	int (*led_hw_control_set)(struct mv88e6xxx_chip *chip,
+				  int port, u8 led,
+				  unsigned long flags);
+	int (*led_hw_control_get)(struct mv88e6xxx_chip *chip,
+				  int port, u8 led,
+				  unsigned long *flags);
 };
 
 struct mv88e6xxx_irq_ops {

-- 
2.43.0


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