diff options
Diffstat (limited to 'target/linux/generic/backport-5.4/709-v5.3-net-phylink-support-for-link-gpio-interrupt.patch')
| -rw-r--r-- | target/linux/generic/backport-5.4/709-v5.3-net-phylink-support-for-link-gpio-interrupt.patch | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.4/709-v5.3-net-phylink-support-for-link-gpio-interrupt.patch b/target/linux/generic/backport-5.4/709-v5.3-net-phylink-support-for-link-gpio-interrupt.patch new file mode 100644 index 0000000000..84a1c853d1 --- /dev/null +++ b/target/linux/generic/backport-5.4/709-v5.3-net-phylink-support-for-link-gpio-interrupt.patch @@ -0,0 +1,90 @@ +From cba0aba37d2228556e0d1f776d403435868cdbfa Mon Sep 17 00:00:00 2001 +From: Russell King <rmk+kernel@armlinux.org.uk> +Date: Tue, 28 May 2019 10:57:23 +0100 +Subject: [PATCH 607/660] net: phylink: support for link gpio interrupt + +Add support for using GPIO interrupts with a fixed-link GPIO rather than +polling the GPIO every second and invoking the phylink resolution. This +avoids unnecessary calls to mac_config(). + +Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> +Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> +Signed-off-by: David S. Miller <davem@davemloft.net> +Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> +--- + drivers/net/phy/phylink.c | 36 ++++++++++++++++++++++++++++++++---- + 1 file changed, 32 insertions(+), 4 deletions(-) + +--- a/drivers/net/phy/phylink.c ++++ b/drivers/net/phy/phylink.c +@@ -59,6 +59,7 @@ struct phylink { + phy_interface_t cur_interface; + + struct gpio_desc *link_gpio; ++ unsigned int link_irq; + struct timer_list link_poll; + void (*get_fixed_state)(struct net_device *dev, + struct phylink_link_state *s); +@@ -645,7 +646,7 @@ void phylink_destroy(struct phylink *pl) + { + if (pl->sfp_bus) + sfp_unregister_upstream(pl->sfp_bus); +- if (!IS_ERR_OR_NULL(pl->link_gpio)) ++ if (pl->link_gpio) + gpiod_put(pl->link_gpio); + + cancel_work_sync(&pl->resolve); +@@ -912,6 +913,15 @@ void phylink_mac_change(struct phylink * + } + EXPORT_SYMBOL_GPL(phylink_mac_change); + ++static irqreturn_t phylink_link_handler(int irq, void *data) ++{ ++ struct phylink *pl = data; ++ ++ phylink_run_resolve(pl); ++ ++ return IRQ_HANDLED; ++} ++ + /** + * phylink_start() - start a phylink instance + * @pl: a pointer to a &struct phylink returned from phylink_create() +@@ -947,7 +957,22 @@ void phylink_start(struct phylink *pl) + clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state); + phylink_run_resolve(pl); + +- if (pl->link_an_mode == MLO_AN_FIXED && !IS_ERR(pl->link_gpio)) ++ if (pl->link_an_mode == MLO_AN_FIXED && pl->link_gpio) { ++ int irq = gpiod_to_irq(pl->link_gpio); ++ ++ if (irq > 0) { ++ if (!request_irq(irq, phylink_link_handler, ++ IRQF_TRIGGER_RISING | ++ IRQF_TRIGGER_FALLING, ++ "netdev link", pl)) ++ pl->link_irq = irq; ++ else ++ irq = 0; ++ } ++ if (irq <= 0) ++ mod_timer(&pl->link_poll, jiffies + HZ); ++ } ++ if (pl->link_an_mode == MLO_AN_FIXED && pl->get_fixed_state) + mod_timer(&pl->link_poll, jiffies + HZ); + if (pl->sfp_bus) + sfp_upstream_start(pl->sfp_bus); +@@ -973,8 +998,11 @@ void phylink_stop(struct phylink *pl) + phy_stop(pl->phydev); + if (pl->sfp_bus) + sfp_upstream_stop(pl->sfp_bus); +- if (pl->link_an_mode == MLO_AN_FIXED && !IS_ERR(pl->link_gpio)) +- del_timer_sync(&pl->link_poll); ++ del_timer_sync(&pl->link_poll); ++ if (pl->link_irq) { ++ free_irq(pl->link_irq, pl); ++ pl->link_irq = 0; ++ } + + phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED); + } |