diff options
| author | Biju Das <biju.das.jz@bp.renesas.com> | 2021-08-25 10:01:54 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-08-25 13:18:17 +0300 |
| commit | 0d13a1a464a023379291218ac051e2bf8f46b5d1 (patch) | |
| tree | a895d2d078002c8a48e91fb5351374a3c47a23a3 /drivers/net/ethernet/renesas | |
| parent | 511d74d9d86ceccb3463fd49adf9de95d4cb3772 (diff) | |
| download | linux-0d13a1a464a023379291218ac051e2bf8f46b5d1.tar.xz | |
ravb: Add reset support
Reset support is present on R-Car. Let's support it, if it is
available.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/renesas')
| -rw-r--r-- | drivers/net/ethernet/renesas/ravb.h | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/renesas/ravb_main.c | 11 |
2 files changed, 12 insertions, 0 deletions
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h index 117eb22349c5..47c5377e4f42 100644 --- a/drivers/net/ethernet/renesas/ravb.h +++ b/drivers/net/ethernet/renesas/ravb.h @@ -1057,6 +1057,7 @@ struct ravb_private { unsigned int num_tx_desc; /* TX descriptors per packet */ const struct ravb_hw_info *info; + struct reset_control *rstc; }; static inline u32 ravb_read(struct net_device *ndev, enum ravb_reg reg) diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index 7a144b45e41d..0f85f2d97b18 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -29,6 +29,7 @@ #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/sys_soc.h> +#include <linux/reset.h> #include <asm/div64.h> @@ -2140,6 +2141,7 @@ static int ravb_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; const struct ravb_hw_info *info; + struct reset_control *rstc; struct ravb_private *priv; struct net_device *ndev; int error, irq, q; @@ -2152,6 +2154,11 @@ static int ravb_probe(struct platform_device *pdev) return -EINVAL; } + rstc = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL); + if (IS_ERR(rstc)) + return dev_err_probe(&pdev->dev, PTR_ERR(rstc), + "failed to get cpg reset\n"); + ndev = alloc_etherdev_mqs(sizeof(struct ravb_private), NUM_TX_QUEUE, NUM_RX_QUEUE); if (!ndev) @@ -2162,6 +2169,7 @@ static int ravb_probe(struct platform_device *pdev) ndev->features = info->net_features; ndev->hw_features = info->net_hw_features; + reset_control_deassert(rstc); pm_runtime_enable(&pdev->dev); pm_runtime_get_sync(&pdev->dev); @@ -2179,6 +2187,7 @@ static int ravb_probe(struct platform_device *pdev) priv = netdev_priv(ndev); priv->info = info; + priv->rstc = rstc; priv->ndev = ndev; priv->pdev = pdev; priv->num_tx_ring[RAVB_BE] = BE_TX_RING_SIZE; @@ -2349,6 +2358,7 @@ out_release: pm_runtime_put(&pdev->dev); pm_runtime_disable(&pdev->dev); + reset_control_assert(rstc); return error; } @@ -2374,6 +2384,7 @@ static int ravb_remove(struct platform_device *pdev) netif_napi_del(&priv->napi[RAVB_BE]); ravb_mdio_release(priv); pm_runtime_disable(&pdev->dev); + reset_control_assert(priv->rstc); free_netdev(ndev); platform_set_drvdata(pdev, NULL); |