[openwrt/openwrt] ipq40xx: edma: convert to of_mdio_find_bus()

[LEDE Commits]

ynezz pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/03bae3cafd92d21dd58686c702b2c4d5d69c946c

commit 03bae3cafd92d21dd58686c702b2c4d5d69c946c
Author: Robert Marko <robert.marko at sartura.hr>
AuthorDate: Wed Oct 7 17:27:31 2020 +0200

    ipq40xx: edma: convert to of_mdio_find_bus()
    
    With the reworked MDIO driver, EDMA will fail to get the MII BUS as it
    used the MII BUS stored inside the MDIO structure private data.
    
    This obviously does not work with the modernized driver, so lets switch
    to using a purpose build of_mdio_find_bus() which will return the MII
    BUS and only requires the MDIO node to be passed.
    This is easy as we already have the node parsed.
    
    Also, since we now require OF_MDIO add that as dependency.
    
    Signed-off-by: Robert Marko <robert.marko at sartura.hr>
---
 .../net/ethernet/qualcomm/essedma/edma_axi.c       | 25 ++++------------------
 ...-net-add-qualcomm-essedma-ethernet-driver.patch |  5 +++--
 2 files changed, 7 insertions(+), 23 deletions(-)

diff --git a/target/linux/ipq40xx/files/drivers/net/ethernet/qualcomm/essedma/edma_axi.c b/target/linux/ipq40xx/files/drivers/net/ethernet/qualcomm/essedma/edma_axi.c
index 68718de9f4..af55ee4dd5 100644
--- a/target/linux/ipq40xx/files/drivers/net/ethernet/qualcomm/essedma/edma_axi.c
+++ b/target/linux/ipq40xx/files/drivers/net/ethernet/qualcomm/essedma/edma_axi.c
@@ -19,6 +19,7 @@
 #include <linux/timer.h>
 #include <linux/of_platform.h>
 #include <linux/of_address.h>
+#include <linux/of_mdio.h>
 #include <linux/clk.h>
 #include <linux/string.h>
 #include <linux/reset.h>
@@ -713,9 +714,7 @@ static int edma_axi_probe(struct platform_device *pdev)
 	struct device_node *np = pdev->dev.of_node;
 	struct device_node *pnp;
 	struct device_node *mdio_node = NULL;
-	struct platform_device *mdio_plat = NULL;
 	struct mii_bus *miibus = NULL;
-	struct edma_mdio_data *mdio_data = NULL;
 	int i, j, k, err = 0;
 	int portid_bmp;
 	int idx = 0, idx_mac = 0;
@@ -889,25 +888,9 @@ static int edma_axi_probe(struct platform_device *pdev)
 			goto err_mdiobus_init_fail;
 		}
 
-		mdio_plat = of_find_device_by_node(mdio_node);
-		if (!mdio_plat) {
-			dev_err(&pdev->dev,
-				"cannot find platform device from mdio node");
-			of_node_put(mdio_node);
-			err = -EIO;
-			goto err_mdiobus_init_fail;
-		}
-
-		mdio_data = dev_get_drvdata(&mdio_plat->dev);
-		if (!mdio_data) {
-			dev_err(&pdev->dev,
-				"cannot get mii bus reference from device data");
-			of_node_put(mdio_node);
-			err = -EIO;
-			goto err_mdiobus_init_fail;
-		}
-
-		miibus = mdio_data->mii_bus;
+		miibus = of_mdio_find_bus(mdio_node);
+		if (!miibus)
+			return -EINVAL;
 	}
 
 	if (of_property_read_bool(np, "qcom,single-phy") &&
diff --git a/target/linux/ipq40xx/patches-5.4/710-net-add-qualcomm-essedma-ethernet-driver.patch b/target/linux/ipq40xx/patches-5.4/710-net-add-qualcomm-essedma-ethernet-driver.patch
index 657d81c5c2..793ce72142 100644
--- a/target/linux/ipq40xx/patches-5.4/710-net-add-qualcomm-essedma-ethernet-driver.patch
+++ b/target/linux/ipq40xx/patches-5.4/710-net-add-qualcomm-essedma-ethernet-driver.patch
@@ -11,13 +11,14 @@ Signed-off-by: Christian Lamparter <chunkeey at gmail.com>
 
 --- a/drivers/net/ethernet/qualcomm/Kconfig
 +++ b/drivers/net/ethernet/qualcomm/Kconfig
-@@ -62,4 +62,13 @@ config QCOM_EMAC
+@@ -62,4 +62,14 @@ config QCOM_EMAC
  
  source "drivers/net/ethernet/qualcomm/rmnet/Kconfig"
  
 +config ESSEDMA
 +	tristate "Qualcomm Atheros ESS Edma support"
-+	---help---
++	depends on OF_MDIO
++	help
 +	  This driver supports ethernet edma adapter.
 +	  Say Y to build this driver.
 +