diff options
Diffstat (limited to 'drivers/net/ethernet/cadence/macb.c')
| -rw-r--r-- | drivers/net/ethernet/cadence/macb.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c index 169059c92f80..8b45bc9ac29e 100644 --- a/drivers/net/ethernet/cadence/macb.c +++ b/drivers/net/ethernet/cadence/macb.c @@ -19,6 +19,7 @@ #include <linux/init.h> #include <linux/io.h> #include <linux/gpio.h> +#include <linux/gpio/consumer.h> #include <linux/interrupt.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> @@ -28,6 +29,7 @@ #include <linux/phy.h> #include <linux/of.h> #include <linux/of_device.h> +#include <linux/of_gpio.h> #include <linux/of_mdio.h> #include <linux/of_net.h> @@ -2817,6 +2819,7 @@ static int macb_probe(struct platform_device *pdev) = macb_clk_init; int (*init)(struct platform_device *) = macb_init; struct device_node *np = pdev->dev.of_node; + struct device_node *phy_node; const struct macb_config *macb_config = NULL; struct clk *pclk, *hclk, *tx_clk; unsigned int queue_mask, num_queues; @@ -2904,6 +2907,16 @@ static int macb_probe(struct platform_device *pdev) else macb_get_hwaddr(bp); + /* Power up the PHY if there is a GPIO reset */ + phy_node = of_get_next_available_child(np, NULL); + if (phy_node) { + int gpio = of_get_named_gpio(phy_node, "reset-gpios", 0); + if (gpio_is_valid(gpio)) + bp->reset_gpio = gpio_to_desc(gpio); + gpiod_set_value(bp->reset_gpio, GPIOD_OUT_HIGH); + } + of_node_put(phy_node); + err = of_get_phy_mode(np); if (err < 0) { pdata = dev_get_platdata(&pdev->dev); @@ -2970,6 +2983,10 @@ static int macb_remove(struct platform_device *pdev) mdiobus_unregister(bp->mii_bus); kfree(bp->mii_bus->irq); mdiobus_free(bp->mii_bus); + + /* Shutdown the PHY if there is a GPIO reset */ + gpiod_set_value(bp->reset_gpio, GPIOD_OUT_LOW); + unregister_netdev(dev); clk_disable_unprepare(bp->tx_clk); clk_disable_unprepare(bp->hclk); |