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ravb: Add reset support

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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>
This commit is contained in:
Biju Das 2021-08-25 08:01:54 +01:00 committed by David S. Miller
parent 511d74d9d8
commit 0d13a1a464
2 changed files with 12 additions and 0 deletions
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1
drivers/net/ethernet/renesas/ravb.h
View File

@ -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)

11
drivers/net/ethernet/renesas/ravb_main.c
View File

@ -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);