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bmips: bcm6368-enetsw: refactor probe

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- Switch to devm functions where possible.
- Fix probing when no resets provided.
- Properly check pointers (IS_ERR_OR_NULL/PTR_ERR).
- Add probe info.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
This commit is contained in:
Álvaro Fernández Rojas 2023-03-28 19:36:59 +02:00
parent 4d99f0ce4d
commit 414ca70684
1 changed files with 29 additions and 23 deletions
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52
target/linux/bmips/files/drivers/net/ethernet/broadcom/bcm6368-enetsw.c
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@ -903,19 +903,25 @@ static const struct net_device_ops bcm6368_enetsw_ops = {
static int bcm6368_enetsw_probe(struct platform_device *pdev)
{
struct bcm6368_enetsw *priv;
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
struct bcm6368_enetsw *priv;
struct net_device *ndev;
struct resource *res;
unsigned i;
int num_resets;
int ret;
ndev = alloc_etherdev(sizeof(*priv));
ndev = devm_alloc_etherdev(dev, sizeof(*priv));
if (!ndev)
return -ENOMEM;
platform_set_drvdata(pdev, ndev);
SET_NETDEV_DEV(ndev, dev);
priv = netdev_priv(ndev);
priv->pdev = pdev;
priv->net_dev = ndev;
priv->num_pms = of_count_phandle_with_args(node, "power-domains",
"#power-domain-cells");
@ -955,18 +961,18 @@ static int bcm6368_enetsw_probe(struct platform_device *pdev)
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dma");
priv->dma_base = devm_ioremap_resource(dev, res);
if (IS_ERR(priv->dma_base))
if (IS_ERR_OR_NULL(priv->dma_base))
return PTR_ERR(priv->dma_base);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"dma-channels");
priv->dma_chan = devm_ioremap_resource(dev, res);
if (IS_ERR(priv->dma_chan))
if (IS_ERR_OR_NULL(priv->dma_chan))
return PTR_ERR(priv->dma_chan);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dma-sram");
priv->dma_sram = devm_ioremap_resource(dev, res);
if (IS_ERR(priv->dma_sram))
if (IS_ERR_OR_NULL(priv->dma_sram))
return PTR_ERR(priv->dma_sram);
priv->irq_rx = platform_get_irq_byname(pdev, "rx");
@ -1006,14 +1012,14 @@ static int bcm6368_enetsw_probe(struct platform_device *pdev)
if (priv->num_clocks) {
priv->clock = devm_kcalloc(dev, priv->num_clocks,
sizeof(struct clk *), GFP_KERNEL);
if (!priv->clock)
return -ENOMEM;
if (IS_ERR_OR_NULL(priv->clock))
return PTR_ERR(priv->clock);
}
for (i = 0; i < priv->num_clocks; i++) {
priv->clock[i] = of_clk_get(node, i);
if (IS_ERR(priv->clock[i])) {
dev_err(dev, "error getting clock %d\n", i);
return -EINVAL;
return PTR_ERR(priv->clock[i]);
}
ret = clk_prepare_enable(priv->clock[i]);
@ -1023,20 +1029,24 @@ static int bcm6368_enetsw_probe(struct platform_device *pdev)
}
}
priv->num_resets = of_count_phandle_with_args(node, "resets",
"#reset-cells");
num_resets = of_count_phandle_with_args(node, "resets",
"#reset-cells");
if (num_resets > 0)
priv->num_resets = num_resets;
else
priv->num_resets = 0;
if (priv->num_resets) {
priv->reset = devm_kcalloc(dev, priv->num_resets,
sizeof(struct reset_control *),
GFP_KERNEL);
if (!priv->reset)
return -ENOMEM;
if (IS_ERR_OR_NULL(priv->reset))
return PTR_ERR(priv->reset);
}
for (i = 0; i < priv->num_resets; i++) {
priv->reset[i] = devm_reset_control_get_by_index(dev, i);
if (IS_ERR(priv->reset[i])) {
dev_err(dev, "error getting reset %d\n", i);
return -EINVAL;
return PTR_ERR(priv->reset[i]);
}
ret = reset_control_reset(priv->reset[i]);
@ -1056,16 +1066,16 @@ static int bcm6368_enetsw_probe(struct platform_device *pdev)
ndev->mtu = ETH_DATA_LEN + ENETSW_TAG_SIZE;
ndev->max_mtu = ETH_DATA_LEN + ENETSW_TAG_SIZE;
netif_napi_add(ndev, &priv->napi, bcm6368_enetsw_poll, 16);
SET_NETDEV_DEV(ndev, dev);
ret = register_netdev(ndev);
if (ret)
ret = devm_register_netdev(dev, ndev);
if (ret) {
netif_napi_del(&priv->napi);
goto out_disable_clk;
}
netif_carrier_off(ndev);
platform_set_drvdata(pdev, ndev);
priv->pdev = pdev;
priv->net_dev = ndev;
dev_info(dev, "%s at 0x%px, IRQ %d\n", ndev->name, priv->dma_base, ndev->irq);
return 0;
@ -1086,8 +1096,6 @@ static int bcm6368_enetsw_remove(struct platform_device *pdev)
struct bcm6368_enetsw *priv = netdev_priv(ndev);
unsigned int i;
unregister_netdev(ndev);
pm_runtime_put_sync(dev);
for (i = 0; priv->pm && i < priv->num_pms; i++) {
dev_pm_domain_detach(priv->pm[i], true);
@ -1100,8 +1108,6 @@ static int bcm6368_enetsw_remove(struct platform_device *pdev)
for (i = 0; i < priv->num_clocks; i++)
clk_disable_unprepare(priv->clock[i]);
free_netdev(ndev);
return 0;
}