mediatek: filogic: move ilm, dlm and cpu_boot in dedicated nodes

This fixes issues with legacy boot loaders that don't process reserved memory
regions outside of system RAM

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 57 insertions, 0 deletions

diff --git a/target/linux/mediatek/patches-5.15/944-net-ethernet-mtk_wed-move-dlm-a-dedicated-dts-node.patch b/target/linux/mediatek/patches-5.15/944-net-ethernet-mtk_wed-move-dlm-a-dedicated-dts-node.patch
new file mode 100644
index 0000000000..fb3940f544
--- /dev/null
+++ b/target/linux/mediatek/patches-5.15/944-net-ethernet-mtk_wed-move-dlm-a-dedicated-dts-node.patch
@@ -0,0 +1,57 @@
+From b74ba226be2c45091b93bd49192bdd6d2178729e Mon Sep 17 00:00:00 2001
+Message-Id: <b74ba226be2c45091b93bd49192bdd6d2178729e.1678718888.git.lorenzo@kernel.org>
+In-Reply-To: <f3565e6c2276411275e707a5442d3f69cc111273.1678718888.git.lorenzo@kernel.org>
+References: <f3565e6c2276411275e707a5442d3f69cc111273.1678718888.git.lorenzo@kernel.org>
+From: Lorenzo Bianconi <lorenzo@kernel.org>
+Date: Mon, 13 Mar 2023 15:45:16 +0100
+Subject: [PATCH net-next 3/3] net: ethernet: mtk_wed: move dlm a dedicated dts
+ node
+
+Since the dlm memory region is not part of the RAM SoC, move dlm in a
+deidicated syscon node.
+This patch helps to keep backward-compatibility with older version of
+uboot codebase where we have a limit of 8 reserved-memory dts child
+nodes.
+Keep backward-compatibility with older dts version where dlm was defined
+as reserved-memory child node.
+
+Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
+---
+ drivers/net/ethernet/mediatek/mtk_wed.c | 19 +++++++++++++++++++
+ 1 file changed, 19 insertions(+)
+
+--- a/drivers/net/ethernet/mediatek/mtk_wed.c
++++ b/drivers/net/ethernet/mediatek/mtk_wed.c
+@@ -806,6 +806,24 @@ mtk_wed_rro_alloc(struct mtk_wed_device
+ 	struct device_node *np;
+ 	int index;
+ 
++	np = of_parse_phandle(dev->hw->node, "mediatek,wo-dlm", 0);
++	if (np) {
++		struct resource res;
++		int ret;
++
++		ret = of_address_to_resource(np, 0, &res);
++		of_node_put(np);
++
++		if (ret < 0)
++			return ret;
++
++		dev->rro.miod_phys = res.start;
++		goto out;
++	}
++
++	/* For backward compatibility, we need to check if DLM
++	 * node is defined through reserved memory property.
++	 */
+ 	index = of_property_match_string(dev->hw->node, "memory-region-names",
+ 					 "wo-dlm");
+ 	if (index < 0)
+@@ -822,6 +840,7 @@ mtk_wed_rro_alloc(struct mtk_wed_device
+ 		return -ENODEV;
+ 
+ 	dev->rro.miod_phys = rmem->base;
++out:
+ 	dev->rro.fdbk_phys = MTK_WED_MIOD_COUNT + dev->rro.miod_phys;
+ 
+ 	return mtk_wed_rro_ring_alloc(dev, &dev->rro.ring,