git.openwrt.org Git - openwrt/staging/thess.git/blob

   1 From dc869a40d73ee6e9f47d683690ae507e30e56044 Mon Sep 17 00:00:00 2001
   2 From: Lorenzo Bianconi <lorenzo@kernel.org>
   3 Date: Wed, 3 Jul 2024 18:12:42 +0200
   4 Subject: [PATCH 1/3] PCI: mediatek-gen3: Add mtk_gen3_pcie_pdata data
   5  structure
   6 MIME-Version: 1.0
   7 Content-Type: text/plain; charset=UTF-8
   8 Content-Transfer-Encoding: 8bit
   9
  10 Introduce mtk_gen3_pcie_pdata data structure in order to define
  11 multiple callbacks for each supported SoC.
  12
  13 This is a preliminary patch to introduce EN7581 PCIe support.
  14
  15 Link: https://lore.kernel.org/linux-pci/c193d1a87505d045e2e0ef33317bce17012ee095.1720022580.git.lorenzo@kernel.org
  16 Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
  17 Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
  18 Tested-by: Zhengping Zhang <zhengping.zhang@airoha.com>
  19 Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
  20 Acked-by: Jianjun Wang <jianjun.wang@mediatek.com>
  21 ---
  22  drivers/pci/controller/pcie-mediatek-gen3.c | 24 ++++++++++++++++++---
  23  1 file changed, 21 insertions(+), 3 deletions(-)
  24
  25 --- a/drivers/pci/controller/pcie-mediatek-gen3.c
  26 +++ b/drivers/pci/controller/pcie-mediatek-gen3.c
  27 @@ -100,6 +100,16 @@
  28  #define PCIE_ATR_TLP_TYPE_MEM          PCIE_ATR_TLP_TYPE(0)
  29  #define PCIE_ATR_TLP_TYPE_IO           PCIE_ATR_TLP_TYPE(2)
  30
  31 +struct mtk_gen3_pcie;
  32 +
  33 +/**
  34 + * struct mtk_gen3_pcie_pdata - differentiate between host generations
  35 + * @power_up: pcie power_up callback
  36 + */
  37 +struct mtk_gen3_pcie_pdata {
  38 +       int (*power_up)(struct mtk_gen3_pcie *pcie);
  39 +};
  40 +
  41  /**
  42   * struct mtk_msi_set - MSI information for each set
  43   * @base: IO mapped register base
  44 @@ -131,6 +141,7 @@ struct mtk_msi_set {
  45   * @msi_sets: MSI sets information
  46   * @lock: lock protecting IRQ bit map
  47   * @msi_irq_in_use: bit map for assigned MSI IRQ
  48 + * @soc: pointer to SoC-dependent operations
  49   */
  50  struct mtk_gen3_pcie {
  51         struct device *dev;
  52 @@ -151,6 +162,8 @@ struct mtk_gen3_pcie {
  53         struct mtk_msi_set msi_sets[PCIE_MSI_SET_NUM];
  54         struct mutex lock;
  55         DECLARE_BITMAP(msi_irq_in_use, PCIE_MSI_IRQS_NUM);
  56 +
  57 +       const struct mtk_gen3_pcie_pdata *soc;
  58  };
  59
  60  /* LTSSM state in PCIE_LTSSM_STATUS_REG bit[28:24] */
  61 @@ -904,7 +917,7 @@ static int mtk_pcie_setup(struct mtk_gen
  62         usleep_range(10, 20);
  63
  64         /* Don't touch the hardware registers before power up */
  65 -       err = mtk_pcie_power_up(pcie);
  66 +       err = pcie->soc->power_up(pcie);
  67         if (err)
  68                 return err;
  69
  70 @@ -939,6 +952,7 @@ static int mtk_pcie_probe(struct platfor
  71         pcie = pci_host_bridge_priv(host);
  72
  73         pcie->dev = dev;
  74 +       pcie->soc = device_get_match_data(dev);
  75         platform_set_drvdata(pdev, pcie);
  76
  77         err = mtk_pcie_setup(pcie);
  78 @@ -1054,7 +1068,7 @@ static int mtk_pcie_resume_noirq(struct
  79         struct mtk_gen3_pcie *pcie = dev_get_drvdata(dev);
  80         int err;
  81
  82 -       err = mtk_pcie_power_up(pcie);
  83 +       err = pcie->soc->power_up(pcie);
  84         if (err)
  85                 return err;
  86
  87 @@ -1074,8 +1088,12 @@ static const struct dev_pm_ops mtk_pcie_
  88                                   mtk_pcie_resume_noirq)
  89  };
  90
  91 +static const struct mtk_gen3_pcie_pdata mtk_pcie_soc_mt8192 = {
  92 +       .power_up = mtk_pcie_power_up,
  93 +};
  94 +
  95  static const struct of_device_id mtk_pcie_of_match[] = {
  96 -       { .compatible = "mediatek,mt8192-pcie" },
  97 +       { .compatible = "mediatek,mt8192-pcie", .data = &mtk_pcie_soc_mt8192 },
  98         {},
  99  };
 100  MODULE_DEVICE_TABLE(of, mtk_pcie_of_match);