treewide: backport support for nvmem on non platform devices

In the current state, nvmem cells are only detected on platform device.
To quickly fix the problem, we register the affected problematic driver
with the of_platform but that is more an hack than a real solution.
Backport from net-next the required patch so that nvmem can work also
with non-platform devices and rework our current patch.
Drop the mediatek and dsa workaround and rework the ath10k patches.
Rework every driver that use the of_get_mac_address api.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>

1 files changed, 77 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.10/782-net-next-2-of-net-fix-of_get_mac_addr_nvmem-for-non-platform-devices.patch b/target/linux/generic/backport-5.10/782-net-next-2-of-net-fix-of_get_mac_addr_nvmem-for-non-platform-devices.patch
new file mode 100644
index 0000000000..245c5f3bd6
--- /dev/null
+++ b/target/linux/generic/backport-5.10/782-net-next-2-of-net-fix-of_get_mac_addr_nvmem-for-non-platform-devices.patch
@@ -0,0 +1,77 @@
+From f10843e04a075202dbb39dfcee047e3a2fdf5a8d Mon Sep 17 00:00:00 2001
+From: Michael Walle <michael@walle.cc>
+Date: Mon, 12 Apr 2021 19:47:18 +0200
+Subject: of: net: fix of_get_mac_addr_nvmem() for non-platform devices
+
+of_get_mac_address() already supports fetching the MAC address by an
+nvmem provider. But until now, it was just working for platform devices.
+Esp. it was not working for DSA ports and PCI devices. It gets more
+common that PCI devices have a device tree binding since SoCs contain
+integrated root complexes.
+
+Use the nvmem of_* binding to fetch the nvmem cells by a struct
+device_node. We still have to try to read the cell by device first
+because there might be a nvmem_cell_lookup associated with that device.
+
+Signed-off-by: Michael Walle <michael@walle.cc>
+Reviewed-by: Andrew Lunn <andrew@lunn.ch>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/of/of_net.c | 35 ++++++++++++++++++++++++++++++-----
+ 1 file changed, 30 insertions(+), 5 deletions(-)
+
+--- a/drivers/of/of_net.c
++++ b/drivers/of/of_net.c
+@@ -11,6 +11,7 @@
+ #include <linux/phy.h>
+ #include <linux/export.h>
+ #include <linux/device.h>
++#include <linux/nvmem-consumer.h>
+ 
+ /**
+  * of_get_phy_mode - Get phy mode for given device_node
+@@ -59,15 +60,39 @@ static int of_get_mac_addr(struct device
+ static int of_get_mac_addr_nvmem(struct device_node *np, u8 *addr)
+ {
+ 	struct platform_device *pdev = of_find_device_by_node(np);
++	struct nvmem_cell *cell;
++	const void *mac;
++	size_t len;
+ 	int ret;
+ 
+-	if (!pdev)
+-		return -ENODEV;
++	/* Try lookup by device first, there might be a nvmem_cell_lookup
++	 * associated with a given device.
++	 */
++	if (pdev) {
++		ret = nvmem_get_mac_address(&pdev->dev, addr);
++		put_device(&pdev->dev);
++		return ret;
++	}
++
++	cell = of_nvmem_cell_get(np, "mac-address");
++	if (IS_ERR(cell))
++		return PTR_ERR(cell);
++
++	mac = nvmem_cell_read(cell, &len);
++	nvmem_cell_put(cell);
++
++	if (IS_ERR(mac))
++		return PTR_ERR(mac);
++
++	if (len != ETH_ALEN || !is_valid_ether_addr(mac)) {
++		kfree(mac);
++		return -EINVAL;
++	}
+ 
+-	ret = nvmem_get_mac_address(&pdev->dev, addr);
+-	put_device(&pdev->dev);
++	memcpy(addr, mac, ETH_ALEN);
++	kfree(mac);
+ 
+-	return ret;
++	return 0;
+ }
+ 
+ /**