From b74ba226be2c45091b93bd49192bdd6d2178729e Mon Sep 17 00:00:00 2001 Message-Id: In-Reply-To: References: From: Lorenzo Bianconi 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 --- 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 @@ -1322,6 +1322,24 @@ 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) @@ -1338,6 +1356,7 @@ 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,