diff options
Diffstat (limited to 'target/linux/generic/backport-5.4/710-v5.16-0002-net-bgmac-support-MDIO-described-in-DT.patch')
| -rw-r--r-- | target/linux/generic/backport-5.4/710-v5.16-0002-net-bgmac-support-MDIO-described-in-DT.patch | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.4/710-v5.16-0002-net-bgmac-support-MDIO-described-in-DT.patch b/target/linux/generic/backport-5.4/710-v5.16-0002-net-bgmac-support-MDIO-described-in-DT.patch new file mode 100644 index 0000000000..f134828273 --- /dev/null +++ b/target/linux/generic/backport-5.4/710-v5.16-0002-net-bgmac-support-MDIO-described-in-DT.patch @@ -0,0 +1,54 @@ +From 45c9d966688e7fad7f24bfc450547d91e4304d0b Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> +Date: Sat, 2 Oct 2021 19:58:12 +0200 +Subject: [PATCH] net: bgmac: support MDIO described in DT +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Check ethernet controller DT node for "mdio" subnode and use it with +of_mdiobus_register() when present. That allows specifying MDIO and its +PHY devices in a standard DT based way. + +This is required for BCM53573 SoC support. That family is sometimes +called Northstar (by marketing?) but is quite different from it. It uses +different CPU(s) and many different hw blocks. + +One of shared blocks in BCM53573 is Ethernet controller. Switch however +is not SRAB accessible (as it Northstar) but is MDIO attached. + +Signed-off-by: Rafał Miłecki <rafal@milecki.pl> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + drivers/net/ethernet/broadcom/bgmac-bcma-mdio.c | 6 +++++- + 1 file changed, 5 insertions(+), 1 deletion(-) + +--- a/drivers/net/ethernet/broadcom/bgmac-bcma-mdio.c ++++ b/drivers/net/ethernet/broadcom/bgmac-bcma-mdio.c +@@ -10,6 +10,7 @@ + + #include <linux/bcma/bcma.h> + #include <linux/brcmphy.h> ++#include <linux/of_mdio.h> + #include "bgmac.h" + + static bool bcma_mdio_wait_value(struct bcma_device *core, u16 reg, u32 mask, +@@ -211,6 +212,7 @@ struct mii_bus *bcma_mdio_mii_register(s + { + struct bcma_device *core = bgmac->bcma.core; + struct mii_bus *mii_bus; ++ struct device_node *np; + int err; + + mii_bus = mdiobus_alloc(); +@@ -229,7 +231,9 @@ struct mii_bus *bcma_mdio_mii_register(s + mii_bus->parent = &core->dev; + mii_bus->phy_mask = ~(1 << bgmac->phyaddr); + +- err = mdiobus_register(mii_bus); ++ np = of_get_child_by_name(core->dev.of_node, "mdio"); ++ ++ err = of_mdiobus_register(mii_bus, np); + if (err) { + dev_err(&core->dev, "Registration of mii bus failed\n"); + goto err_free_bus; |