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91 lines
2.8 KiB
Diff
91 lines
2.8 KiB
Diff
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From cba0aba37d2228556e0d1f776d403435868cdbfa Mon Sep 17 00:00:00 2001
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From: Russell King <rmk+kernel@armlinux.org.uk>
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Date: Tue, 28 May 2019 10:57:23 +0100
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Subject: [PATCH 607/660] net: phylink: support for link gpio interrupt
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Add support for using GPIO interrupts with a fixed-link GPIO rather than
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polling the GPIO every second and invoking the phylink resolution. This
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avoids unnecessary calls to mac_config().
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Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
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Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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---
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drivers/net/phy/phylink.c | 36 ++++++++++++++++++++++++++++++++----
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1 file changed, 32 insertions(+), 4 deletions(-)
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--- a/drivers/net/phy/phylink.c
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+++ b/drivers/net/phy/phylink.c
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@@ -59,6 +59,7 @@ struct phylink {
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phy_interface_t cur_interface;
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struct gpio_desc *link_gpio;
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+ unsigned int link_irq;
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struct timer_list link_poll;
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void (*get_fixed_state)(struct net_device *dev,
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struct phylink_link_state *s);
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@@ -645,7 +646,7 @@ void phylink_destroy(struct phylink *pl)
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{
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if (pl->sfp_bus)
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sfp_unregister_upstream(pl->sfp_bus);
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- if (!IS_ERR_OR_NULL(pl->link_gpio))
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+ if (pl->link_gpio)
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gpiod_put(pl->link_gpio);
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cancel_work_sync(&pl->resolve);
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@@ -912,6 +913,15 @@ void phylink_mac_change(struct phylink *
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}
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EXPORT_SYMBOL_GPL(phylink_mac_change);
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+static irqreturn_t phylink_link_handler(int irq, void *data)
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+{
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+ struct phylink *pl = data;
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+
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+ phylink_run_resolve(pl);
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+
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+ return IRQ_HANDLED;
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+}
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+
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/**
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* phylink_start() - start a phylink instance
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* @pl: a pointer to a &struct phylink returned from phylink_create()
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@@ -947,7 +957,22 @@ void phylink_start(struct phylink *pl)
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clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
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phylink_run_resolve(pl);
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- if (pl->link_an_mode == MLO_AN_FIXED && !IS_ERR(pl->link_gpio))
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+ if (pl->link_an_mode == MLO_AN_FIXED && pl->link_gpio) {
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+ int irq = gpiod_to_irq(pl->link_gpio);
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+
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+ if (irq > 0) {
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+ if (!request_irq(irq, phylink_link_handler,
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+ IRQF_TRIGGER_RISING |
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+ IRQF_TRIGGER_FALLING,
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+ "netdev link", pl))
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+ pl->link_irq = irq;
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+ else
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+ irq = 0;
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+ }
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+ if (irq <= 0)
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+ mod_timer(&pl->link_poll, jiffies + HZ);
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+ }
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+ if (pl->link_an_mode == MLO_AN_FIXED && pl->get_fixed_state)
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mod_timer(&pl->link_poll, jiffies + HZ);
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if (pl->sfp_bus)
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sfp_upstream_start(pl->sfp_bus);
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@@ -973,8 +998,11 @@ void phylink_stop(struct phylink *pl)
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phy_stop(pl->phydev);
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if (pl->sfp_bus)
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sfp_upstream_stop(pl->sfp_bus);
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- if (pl->link_an_mode == MLO_AN_FIXED && !IS_ERR(pl->link_gpio))
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- del_timer_sync(&pl->link_poll);
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+ del_timer_sync(&pl->link_poll);
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+ if (pl->link_irq) {
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+ free_irq(pl->link_irq, pl);
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+ pl->link_irq = 0;
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+ }
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phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED);
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}
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