[PATCH 19/43] net: cirrus: add DT support for Cirrus EP93xx
From: Nikita Shubin <nikita.shubin@maquefel.me>
Date: 2023-04-24 10:35:11
Also in:
lkml
Subsystem:
cirrus logic ep93xx ethernet driver, networking drivers, the rest · Maintainers:
Hartley Sweeten, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
- find register range from the device tree
- get "copy_addr" from the device tree
- get phy_id from the device tree
Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
---
Notes:
rfc->v0
Fixed warnings on "(base_addr == NULL)", pace required before the open
parenthesis '('.
Arnd Bergmann:
- wildcards ep93xx to something meaningful, i.e. ep9301
- drop wrappers
drivers/net/ethernet/cirrus/ep93xx_eth.c | 49 +++++++++++++++++++++---
1 file changed, 43 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ethernet/cirrus/ep93xx_eth.c b/drivers/net/ethernet/cirrus/ep93xx_eth.c
index 8627ab19d470..b156cc75daad 100644
--- a/drivers/net/ethernet/cirrus/ep93xx_eth.c
+++ b/drivers/net/ethernet/cirrus/ep93xx_eth.c@@ -17,6 +17,8 @@ #include <linux/interrupt.h> #include <linux/moduleparam.h> #include <linux/platform_device.h> +#include <linux/of.h> +#include <linux/of_platform.h> #include <linux/delay.h> #include <linux/io.h> #include <linux/slab.h>
@@ -792,6 +794,8 @@ static int ep93xx_eth_probe(struct platform_device *pdev) struct net_device *dev; struct ep93xx_priv *ep; struct resource *mem; + void __iomem *base_addr; + struct device_node *np; int irq; int err;
@@ -804,6 +808,38 @@ static int ep93xx_eth_probe(struct platform_device *pdev) if (!mem || irq < 0) return -ENXIO; + base_addr = ioremap(mem->start, resource_size(mem)); + if (!base_addr) { + dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n"); + return -EIO; + } + + if (!data) { + np = pdev->dev.of_node; + if (IS_ENABLED(CONFIG_OF) && np) { + u32 phy_id; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + if (of_property_read_bool(np, "copy_addr")) { + memcpy_fromio(data->dev_addr, base_addr + 0x50, 6); + dev_info(&pdev->dev, "MAC=%pM\n", data->dev_addr); + } + + if (of_property_read_u32(np, "phy_id", &phy_id)) { + dev_err(&pdev->dev, "Failed to parse \"phy_id\"\n"); + return -ENOENT; + } + + data->phy_id = phy_id; + } + } + + if (!data) + return -ENOENT; + dev = ep93xx_dev_alloc(data); if (dev == NULL) { err = -ENOMEM;
@@ -824,12 +860,7 @@ 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;
@@ -859,12 +890,18 @@ 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" }, + {}, +}; +MODULE_DEVICE_TABLE(of, ep93xx_eth_of_ids); static struct platform_driver ep93xx_eth_driver = { .probe = ep93xx_eth_probe, .remove = ep93xx_eth_remove, .driver = { .name = "ep93xx-eth", + .of_match_table = ep93xx_eth_of_ids, }, };
--
2.39.2