[U-Boot] [PATCH v4 1/2] Enable FEC driver to retrieve PHY address from device tree

Martyn Welch
2018-12-11T11:34:45Z

Currently if we have more than one phy on the MDIO bus, we do not have a
good mechanism for determining which should be used at runtime. Enable the
FEC driver to determine the address for the PHY from the device tree.

Signed-off-by: Martyn Welch <martyn.welch@collabora.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>

---

Changes in v4:
- No changes in v4

Changes in v3:
- No changes in v3

Changes in v2:
- New in v2

drivers/net/fec_mxc.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)

diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c
index 99c5c649a0..425f6197cb 100644
--- a/drivers/net/fec_mxc.c
+++ b/drivers/net/fec_mxc.c
@@ -1264,11 +1264,32 @@ static const struct eth_ops fecmxc_ops = {
.read_rom_hwaddr = fecmxc_read_rom_hwaddr,
};

+static int device_get_phy_addr(struct udevice *dev)
+{
+ struct ofnode_phandle_args phandle_args;
+ int reg;
+
+ if (dev_read_phandle_with_args(dev, "phy-handle", NULL, 0, 0,
+ &phandle_args)) {
+ debug("Failed to find phy-handle");
+ return -ENODEV;
+ }
+
+ reg = ofnode_read_u32_default(phandle_args.node, "reg", 0);
+
+ return reg;
+}
+
static int fec_phy_init(struct fec_priv *priv, struct udevice *dev)
{
struct phy_device *phydev;
+ int addr;
int mask = 0xffffffff;

+ addr = device_get_phy_addr(dev);
+ if (addr >= 0)
+ mask = 1 << addr;
+
#ifdef CONFIG_FEC_MXC_PHYADDR
mask = 1 << CONFIG_FEC_MXC_PHYADDR;
#endif
--
2.19.2