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net: ethernet: ravb: Enable optional refclk

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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: Adam Ford <aford173@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Adam Ford 2021-04-12 08:26:19 -05:00 committed by David S. Miller
parent 6f43735b6d
commit 8ef7adc6be
2 changed files with 11 additions and 0 deletions
drivers/net/ethernet/renesas
ravb.hravb_main.c

1
drivers/net/ethernet/renesas/ravb.h
View File

@ -993,6 +993,7 @@ struct ravb_private {
struct platform_device *pdev; struct platform_device *pdev;
void __iomem *addr; void __iomem *addr;
struct clk *clk; struct clk *clk;
struct clk *refclk;
struct mdiobb_ctrl mdiobb; struct mdiobb_ctrl mdiobb;
u32 num_rx_ring[NUM_RX_QUEUE]; u32 num_rx_ring[NUM_RX_QUEUE];
u32 num_tx_ring[NUM_TX_QUEUE]; u32 num_tx_ring[NUM_TX_QUEUE];

10
drivers/net/ethernet/renesas/ravb_main.c
View File

@ -2148,6 +2148,13 @@ static int ravb_probe(struct platform_device *pdev)
goto out_release; 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->max_mtu = 2048 - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
ndev->min_mtu = ETH_MIN_MTU; ndev->min_mtu = ETH_MIN_MTU;
@ -2244,6 +2251,7 @@ out_dma_free:
if (chip_id != RCAR_GEN2) if (chip_id != RCAR_GEN2)
ravb_ptp_stop(ndev); ravb_ptp_stop(ndev);
out_release: out_release:
clk_disable_unprepare(priv->refclk);
free_netdev(ndev); free_netdev(ndev);
pm_runtime_put(&pdev->dev); pm_runtime_put(&pdev->dev);
@ -2260,6 +2268,8 @@ static int ravb_remove(struct platform_device *pdev)
if (priv->chip_id != RCAR_GEN2) if (priv->chip_id != RCAR_GEN2)
ravb_ptp_stop(ndev); ravb_ptp_stop(ndev);
clk_disable_unprepare(priv->refclk);
dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat, dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
priv->desc_bat_dma); priv->desc_bat_dma);
/* Set reset mode */ /* Set reset mode */