Commit 8ef7adc6 authored by Adam Ford's avatar Adam Ford Committed by David S. Miller
Browse files

net: ethernet: ravb: Enable optional refclk 



For devices that use a programmable clock for the AVB reference clock,
the driver may need to enable them.  Add code to find the optional clock
and enable it when available.

Signed-off-by: default avatarAdam Ford <aford173@gmail.com>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6f43735b

drivers/net/ethernet/renesas/ravb.h

+1 −0
Original line number Diff line number Diff line
@@ -993,6 +993,7 @@ struct ravb_private { 
	struct platform_device *pdev;

	void __iomem *addr;

	struct clk *clk;

	struct clk *refclk;

	struct mdiobb_ctrl mdiobb;

	u32 num_rx_ring[NUM_RX_QUEUE];

	u32 num_tx_ring[NUM_TX_QUEUE];

drivers/net/ethernet/renesas/ravb_main.c

+10 −0
Original line number Diff line number Diff line
@@ -2148,6 +2148,13 @@ static int ravb_probe(struct platform_device *pdev) 
		goto out_release;

	}



	priv->refclk = devm_clk_get_optional(&pdev->dev, "refclk");

	if (IS_ERR(priv->refclk)) {

		error = PTR_ERR(priv->refclk);

		goto out_release;

	}

	clk_prepare_enable(priv->refclk);



	ndev->max_mtu = 2048 - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);

	ndev->min_mtu = ETH_MIN_MTU;
@@ -2244,6 +2251,7 @@ static int ravb_probe(struct platform_device *pdev) 
	if (chip_id != RCAR_GEN2)

		ravb_ptp_stop(ndev);

out_release:

	clk_disable_unprepare(priv->refclk);

	free_netdev(ndev);



	pm_runtime_put(&pdev->dev);
@@ -2260,6 +2268,8 @@ static int ravb_remove(struct platform_device *pdev) 
	if (priv->chip_id != RCAR_GEN2)

		ravb_ptp_stop(ndev);



	clk_disable_unprepare(priv->refclk);



	dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,

			  priv->desc_bat_dma);

	/* Set reset mode */