drivers/net/dsa/mt7530-mmio.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2
   3 #include <linux/module.h>
   4 #include <linux/of_platform.h>
   5 #include <linux/regmap.h>
   6 #include <linux/regulator/consumer.h>
   7 #include <linux/reset.h>
   8 #include <net/dsa.h>
   9
  10 #include "mt7530.h"
  11
  12 static const struct of_device_id mt7988_of_match[] = {
  13         { .compatible = "mediatek,mt7988-switch", .data = &mt753x_table[ID_MT7988], },
  14         { /* sentinel */ },
  15 };
  16 MODULE_DEVICE_TABLE(of, mt7988_of_match);
  17
  18 static int
  19 mt7988_probe(struct platform_device *pdev)
  20 {
  21         static struct regmap_config *sw_regmap_config;
  22         struct mt7530_priv *priv;
  23         void __iomem *base_addr;
  24         int ret;
  25
  26         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
  27         if (!priv)
  28                 return -ENOMEM;
  29
  30         priv->bus = NULL;
  31         priv->dev = &pdev->dev;
  32
  33         ret = mt7530_probe_common(priv);
  34         if (ret)
  35                 return ret;
  36
  37         priv->rstc = devm_reset_control_get(&pdev->dev, NULL);
  38         if (IS_ERR(priv->rstc)) {
  39                 dev_err(&pdev->dev, "Couldn't get our reset line\n");
  40                 return PTR_ERR(priv->rstc);
  41         }
  42
  43         base_addr = devm_platform_ioremap_resource(pdev, 0);
  44         if (IS_ERR(base_addr)) {
  45                 dev_err(&pdev->dev, "cannot request I/O memory space\n");
  46                 return -ENXIO;
  47         }
  48
  49         sw_regmap_config = devm_kzalloc(&pdev->dev, sizeof(*sw_regmap_config), GFP_KERNEL);
  50         if (!sw_regmap_config)
  51                 return -ENOMEM;
  52
  53         sw_regmap_config->name = "switch";
  54         sw_regmap_config->reg_bits = 16;
  55         sw_regmap_config->val_bits = 32;
  56         sw_regmap_config->reg_stride = 4;
  57         sw_regmap_config->max_register = MT7530_CREV;
  58         priv->regmap = devm_regmap_init_mmio(&pdev->dev, base_addr, sw_regmap_config);
  59         if (IS_ERR(priv->regmap))
  60                 return PTR_ERR(priv->regmap);
  61
  62         return dsa_register_switch(priv->ds);
  63 }
  64
  65 static int
  66 mt7988_remove(struct platform_device *pdev)
  67 {
  68         struct mt7530_priv *priv = platform_get_drvdata(pdev);
  69
  70         if (priv)
  71                 mt7530_remove_common(priv);
  72
  73         return 0;
  74 }
  75
  76 static void mt7988_shutdown(struct platform_device *pdev)
  77 {
  78         struct mt7530_priv *priv = platform_get_drvdata(pdev);
  79
  80         if (!priv)
  81                 return;
  82
  83         dsa_switch_shutdown(priv->ds);
  84
  85         dev_set_drvdata(&pdev->dev, NULL);
  86 }
  87
  88 static struct platform_driver mt7988_platform_driver = {
  89         .probe  = mt7988_probe,
  90         .remove = mt7988_remove,
  91         .shutdown = mt7988_shutdown,
  92         .driver = {
  93                 .name = "mt7530-mmio",
  94                 .of_match_table = mt7988_of_match,
  95         },
  96 };
  97 module_platform_driver(mt7988_platform_driver);
  98
  99 MODULE_AUTHOR("Daniel Golle <[email protected]>");
 100 MODULE_DESCRIPTION("Driver for Mediatek MT7530 Switch (MMIO)");
 101 MODULE_LICENSE("GPL");