target/linux/mediatek/patches-6.1/944-net-ethernet-mtk_wed-move-dlm-a-dedicated-dts-node.patch

   1 From b74ba226be2c45091b93bd49192bdd6d2178729e Mon Sep 17 00:00:00 2001
   2 Message-Id: <b74ba226be2c45091b93bd49192bdd6d2178729e.1678718888.git.lorenzo@kernel.org>
   3 In-Reply-To: <f3565e6c2276411275e707a5442d3f69cc111273.1678718888.git.lorenzo@kernel.org>
   4 References: <f3565e6c2276411275e707a5442d3f69cc111273.1678718888.git.lorenzo@kernel.org>
   5 From: Lorenzo Bianconi <lorenzo@kernel.org>
   6 Date: Mon, 13 Mar 2023 15:45:16 +0100
   7 Subject: [PATCH net-next 3/3] net: ethernet: mtk_wed: move dlm a dedicated dts
   8  node
   9
  10 Since the dlm memory region is not part of the RAM SoC, move dlm in a
  11 deidicated syscon node.
  12 This patch helps to keep backward-compatibility with older version of
  13 uboot codebase where we have a limit of 8 reserved-memory dts child
  14 nodes.
  15 Keep backward-compatibility with older dts version where dlm was defined
  16 as reserved-memory child node.
  17
  18 Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
  19 ---
  20  drivers/net/ethernet/mediatek/mtk_wed.c | 19 +++++++++++++++++++
  21  1 file changed, 19 insertions(+)
  22
  23 --- a/drivers/net/ethernet/mediatek/mtk_wed.c
  24 +++ b/drivers/net/ethernet/mediatek/mtk_wed.c
  25 @@ -814,6 +814,24 @@ mtk_wed_rro_alloc(struct mtk_wed_device
  26         struct device_node *np;
  27         int index;
  28
  29 +       np = of_parse_phandle(dev->hw->node, "mediatek,wo-dlm", 0);
  30 +       if (np) {
  31 +               struct resource res;
  32 +               int ret;
  33 +
  34 +               ret = of_address_to_resource(np, 0, &res);
  35 +               of_node_put(np);
  36 +
  37 +               if (ret < 0)
  38 +                       return ret;
  39 +
  40 +               dev->rro.miod_phys = res.start;
  41 +               goto out;
  42 +       }
  43 +
  44 +       /* For backward compatibility, we need to check if DLM
  45 +        * node is defined through reserved memory property.
  46 +        */
  47         index = of_property_match_string(dev->hw->node, "memory-region-names",
  48                                          "wo-dlm");
  49         if (index < 0)
  50 @@ -830,6 +848,7 @@ mtk_wed_rro_alloc(struct mtk_wed_device
  51                 return -ENODEV;
  52
  53         dev->rro.miod_phys = rmem->base;
  54 +out:
  55         dev->rro.fdbk_phys = MTK_WED_MIOD_COUNT + dev->rro.miod_phys;
  56
  57         return mtk_wed_rro_ring_alloc(dev, &dev->rro.ring,