[v5,17/39] net: cirrus: add DT support for Cirrus EP93xx
Commit Message
From: Nikita Shubin <nikita.shubin@maquefel.me>
- add OF ID match table
- get phy_id from the device tree, as part of mdio
- copy_addr is now always used, as there is no SoC/board that aren't
- dropped platform header
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
---
drivers/net/ethernet/cirrus/ep93xx_eth.c | 63 ++++++++++++++++----------------
1 file changed, 32 insertions(+), 31 deletions(-)
Comments
On Wed, Nov 22, 2023 at 11:59:55AM +0300, Nikita Shubin wrote:
> - add OF ID match table
> - get phy_id from the device tree, as part of mdio
> - copy_addr is now always used, as there is no SoC/board that aren't
> - dropped platform header
...
> #include <linux/interrupt.h>
> #include <linux/moduleparam.h>
> #include <linux/platform_device.h>
> +#include <linux/of.h>
Perhaps more ordering?
> #include <linux/delay.h>
> #include <linux/io.h>
> #include <linux/slab.h>
...
> + err = of_property_read_u32(np, "reg", &phy_id);
> + of_node_put(np);
> + if (err)
> + return dev_err_probe(&pdev->dev, -ENOENT, "Failed to locate \"phy_id\"\n");
Why shadowing the actual error code?
> +
> + dev = alloc_etherdev(sizeof(struct ep93xx_priv));
> if (dev == NULL) {
> err = -ENOMEM;
> goto err_out;
> }
Hello Andy!
Thanks for review (i am counting all review not only this patch), only
this comment below raised a question:
On Wed, 2023-11-22 at 14:16 +0200, Andy Shevchenko wrote:
> On Wed, Nov 22, 2023 at 11:59:55AM +0300, Nikita Shubin wrote:
> > - add OF ID match table
> > - get phy_id from the device tree, as part of mdio
> > - copy_addr is now always used, as there is no SoC/board that
> > aren't
> > - dropped platform header
>
> ...
>
> > #include <linux/interrupt.h>
> > #include <linux/moduleparam.h>
> > #include <linux/platform_device.h>
> > +#include <linux/of.h>
>
> Perhaps more ordering?
>
> > #include <linux/delay.h>
> > #include <linux/io.h>
> > #include <linux/slab.h>
>
> ...
>
> > + err = of_property_read_u32(np, "reg", &phy_id);
> > + of_node_put(np);
> > + if (err)
> > + return dev_err_probe(&pdev->dev, -ENOENT, "Failed
> > to locate \"phy_id\"\n");
>
> Why shadowing the actual error code?
of_property_read_u32 returns NULL on error.
>
> > +
> > + dev = alloc_etherdev(sizeof(struct ep93xx_priv));
> > if (dev == NULL) {
> > err = -ENOMEM;
> > goto err_out;
> > }
>
@@ -17,12 +17,11 @@
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
#include <linux/platform_device.h>
+#include <linux/of.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/slab.h>
-#include <linux/platform_data/eth-ep93xx.h>
-
#define DRV_MODULE_NAME "ep93xx-eth"
#define RX_QUEUE_ENTRIES 64
@@ -738,25 +737,6 @@ static const struct net_device_ops ep93xx_netdev_ops = {
.ndo_set_mac_address = eth_mac_addr,
};
-static struct net_device *ep93xx_dev_alloc(struct ep93xx_eth_data *data)
-{
- struct net_device *dev;
-
- dev = alloc_etherdev(sizeof(struct ep93xx_priv));
- if (dev == NULL)
- return NULL;
-
- eth_hw_addr_set(dev, data->dev_addr);
-
- dev->ethtool_ops = &ep93xx_ethtool_ops;
- dev->netdev_ops = &ep93xx_netdev_ops;
-
- dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
-
- return dev;
-}
-
-
static void ep93xx_eth_remove(struct platform_device *pdev)
{
struct net_device *dev;
@@ -786,27 +766,47 @@ static void ep93xx_eth_remove(struct platform_device *pdev)
static int ep93xx_eth_probe(struct platform_device *pdev)
{
- struct ep93xx_eth_data *data;
struct net_device *dev;
struct ep93xx_priv *ep;
struct resource *mem;
+ void __iomem *base_addr;
+ struct device_node *np;
+ u32 phy_id;
int irq;
int err;
if (pdev == NULL)
return -ENODEV;
- data = dev_get_platdata(&pdev->dev);
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq = platform_get_irq(pdev, 0);
if (!mem || irq < 0)
return -ENXIO;
- dev = ep93xx_dev_alloc(data);
+ base_addr = ioremap(mem->start, resource_size(mem));
+ if (!base_addr)
+ return dev_err_probe(&pdev->dev, -EIO, "Failed to ioremap ethernet registers\n");
+
+ np = of_parse_phandle(pdev->dev.of_node, "phy-handle", 0);
+ if (!np)
+ return dev_err_probe(&pdev->dev, -ENODEV, "Please provide \"phy-handle\"\n");
+
+ err = of_property_read_u32(np, "reg", &phy_id);
+ of_node_put(np);
+ if (err)
+ return dev_err_probe(&pdev->dev, -ENOENT, "Failed to locate \"phy_id\"\n");
+
+ dev = alloc_etherdev(sizeof(struct ep93xx_priv));
if (dev == NULL) {
err = -ENOMEM;
goto err_out;
}
+
+ eth_hw_addr_set(dev, base_addr + 0x50);
+ dev->ethtool_ops = &ep93xx_ethtool_ops;
+ dev->netdev_ops = &ep93xx_netdev_ops;
+ dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
+
ep = netdev_priv(dev);
ep->dev = dev;
SET_NETDEV_DEV(dev, &pdev->dev);
@@ -822,15 +822,10 @@ static int ep93xx_eth_probe(struct platform_device *pdev)
goto err_out;
}
- ep->base_addr = ioremap(mem->start, resource_size(mem));
- if (ep->base_addr == NULL) {
- dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
- err = -EIO;
- goto err_out;
- }
+ ep->base_addr = base_addr;
ep->irq = irq;
- ep->mii.phy_id = data->phy_id;
+ ep->mii.phy_id = phy_id;
ep->mii.phy_id_mask = 0x1f;
ep->mii.reg_num_mask = 0x1f;
ep->mii.dev = dev;
@@ -857,12 +852,18 @@ static int ep93xx_eth_probe(struct platform_device *pdev)
return err;
}
+static const struct of_device_id ep93xx_eth_of_ids[] = {
+ { .compatible = "cirrus,ep9301-eth" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, ep93xx_eth_of_ids);
static struct platform_driver ep93xx_eth_driver = {
.probe = ep93xx_eth_probe,
.remove_new = ep93xx_eth_remove,
.driver = {
.name = "ep93xx-eth",
+ .of_match_table = ep93xx_eth_of_ids,
},
};