net: dsa: bcm_sf2: Do not rely on kexec_in_progress

[cascardo/linux.git] / drivers / net / dsa / bcm_sf2.c

diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index e218887..e3ee27c 100644 (file)
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -1133,6 +1133,20 @@ static int bcm_sf2_sw_remove(struct platform_device *pdev)
        return 0;
 }
 
+static void bcm_sf2_sw_shutdown(struct platform_device *pdev)
+{
+       struct bcm_sf2_priv *priv = platform_get_drvdata(pdev);
+
+       /* For a kernel about to be kexec'd we want to keep the GPHY on for a
+        * successful MDIO bus scan to occur. If we did turn off the GPHY
+        * before (e.g: port_disable), this will also power it back on.
+        *
+        * Do not rely on kexec_in_progress, just power the PHY on.
+        */
+       if (priv->hw_params.num_gphy == 1)
+               bcm_sf2_gphy_enable_set(priv->dev->ds, true);
+}
+
 #ifdef CONFIG_PM_SLEEP
 static int bcm_sf2_suspend(struct device *dev)
 {
@@ -1158,10 +1172,12 @@ static const struct of_device_id bcm_sf2_of_match[] = {
        { .compatible = "brcm,bcm7445-switch-v4.0" },
        { /* sentinel */ },
 };
+MODULE_DEVICE_TABLE(of, bcm_sf2_of_match);
 
 static struct platform_driver bcm_sf2_driver = {
        .probe  = bcm_sf2_sw_probe,
        .remove = bcm_sf2_sw_remove,
+       .shutdown = bcm_sf2_sw_shutdown,
        .driver = {
                .name = "brcm-sf2",
                .of_match_table = bcm_sf2_of_match,