linux-kernel - [PATCH] net: sfp: Unique GPIO interrupt names

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Date:   Mon, 6 Jul 2020 12:38:37 -0700
From:   Chris Healy <cphealy@...il.com>
To:     Russell King - ARM Linux <linux@...linux.org.uk>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        "David S. Miller" <davem@...emloft.net>, kuba@...nel.org,
        netdev <netdev@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH] net: sfp: Unique GPIO interrupt names

Dynamically generate a unique GPIO interrupt name, based on the
device name and the GPIO name.  For example:

103:          0   sx1503q  12 Edge      sff2-los
104:          0   sx1503q  13 Edge      sff3-los

The sffX indicates the SFP the loss of signal GPIO is associated with.

Signed-off-by: Chris Healy <cphealy@...il.com>
---
 drivers/net/phy/sfp.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c
index 73c2969f11a4..9b03c7229320 100644
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -220,6 +220,7 @@ struct sfp {
     struct phy_device *mod_phy;
     const struct sff_data *type;
     u32 max_power_mW;
+    char sfp_irq_name[32];

     unsigned int (*get_state)(struct sfp *);
     void (*set_state)(struct sfp *, unsigned int);
@@ -2349,12 +2350,15 @@ static int sfp_probe(struct platform_device *pdev)
             continue;
         }

+        snprintf(sfp->sfp_irq_name, sizeof(sfp->sfp_irq_name),
+             "%s-%s", dev_name(sfp->dev), gpio_of_names[i]);
+
         err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i],
                         NULL, sfp_irq,
                         IRQF_ONESHOT |
                         IRQF_TRIGGER_RISING |
                         IRQF_TRIGGER_FALLING,
-                        dev_name(sfp->dev), sfp);
+                        sfp->sfp_irq_name, sfp);
         if (err) {
             sfp->gpio_irq[i] = 0;
             sfp->need_poll = true;
-- 
2.21.3