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

   1 From 998f0633773b3432829fe45d2cd2ffb842f3c78e Mon Sep 17 00:00:00 2001
   2 From: William-tw Lin <william-tw.lin@mediatek.com>
   3 Date: Sat, 24 Feb 2024 11:45:07 +0000
   4 Subject: [PATCH] nvmem: mtk-efuse: Register MediaTek socinfo driver from efuse
   5
   6 The socinfo driver reads chip information from eFuses and does not need
   7 any devicetree node. Register it from mtk-efuse.
   8
   9 While at it, also add the name for this driver's nvmem_config.
  10
  11 Signed-off-by: William-tw Lin <william-tw.lin@mediatek.com>
  12 Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
  13 Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
  14 Link: https://lore.kernel.org/r/20240224114516.86365-3-srinivas.kandagatla@linaro.org
  15 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  16 ---
  17  drivers/nvmem/mtk-efuse.c | 21 ++++++++++++++++++++-
  18  1 file changed, 20 insertions(+), 1 deletion(-)
  19
  20 --- a/drivers/nvmem/mtk-efuse.c
  21 +++ b/drivers/nvmem/mtk-efuse.c
  22 @@ -68,6 +68,7 @@ static int mtk_efuse_probe(struct platfo
  23         struct nvmem_config econfig = {};
  24         struct mtk_efuse_priv *priv;
  25         const struct mtk_efuse_pdata *pdata;
  26 +       struct platform_device *socinfo;
  27
  28         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
  29         if (!priv)
  30 @@ -85,11 +86,20 @@ static int mtk_efuse_probe(struct platfo
  31         econfig.size = resource_size(res);
  32         econfig.priv = priv;
  33         econfig.dev = dev;
  34 +       econfig.name = "mtk-efuse";
  35         if (pdata->uses_post_processing)
  36                 econfig.fixup_dt_cell_info = &mtk_efuse_fixup_dt_cell_info;
  37         nvmem = devm_nvmem_register(dev, &econfig);
  38 +       if (IS_ERR(nvmem))
  39 +               return PTR_ERR(nvmem);
  40
  41 -       return PTR_ERR_OR_ZERO(nvmem);
  42 +       socinfo = platform_device_register_data(&pdev->dev, "mtk-socinfo",
  43 +                                               PLATFORM_DEVID_AUTO, NULL, 0);
  44 +       if (IS_ERR(socinfo))
  45 +               dev_info(dev, "MediaTek SoC Information will be unavailable\n");
  46 +
  47 +       platform_set_drvdata(pdev, socinfo);
  48 +       return 0;
  49  }
  50
  51  static const struct mtk_efuse_pdata mtk_mt8186_efuse_pdata = {
  52 @@ -108,8 +118,17 @@ static const struct of_device_id mtk_efu
  53  };
  54  MODULE_DEVICE_TABLE(of, mtk_efuse_of_match);
  55
  56 +static void mtk_efuse_remove(struct platform_device *pdev)
  57 +{
  58 +       struct platform_device *socinfo = platform_get_drvdata(pdev);
  59 +
  60 +       if (!IS_ERR_OR_NULL(socinfo))
  61 +               platform_device_unregister(socinfo);
  62 +}
  63 +
  64  static struct platform_driver mtk_efuse_driver = {
  65         .probe = mtk_efuse_probe,
  66 +       .remove_new = mtk_efuse_remove,
  67         .driver = {
  68                 .name = "mediatek,efuse",
  69                 .of_match_table = mtk_efuse_of_match,