drivers/bus/sun50i-de2.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Allwinner A64 Display Engine 2.0 Bus Driver
   4  *
   5  * Copyright (C) 2018 Icenowy Zheng <icenowy@aosc.io>
   6  */
   7
   8 #include <linux/of_platform.h>
   9 #include <linux/platform_device.h>
  10 #include <linux/soc/sunxi/sunxi_sram.h>
  11
  12 static int sun50i_de2_bus_probe(struct platform_device *pdev)
  13 {
  14         struct device_node *np = pdev->dev.of_node;
  15         int ret;
  16
  17         ret = sunxi_sram_claim(&pdev->dev);
  18         if (ret)
  19                 return dev_err_probe(&pdev->dev, ret,
  20                                      "Couldn't map SRAM to device\n");
  21
  22         of_platform_populate(np, NULL, NULL, &pdev->dev);
  23
  24         return 0;
  25 }
  26
  27 static int sun50i_de2_bus_remove(struct platform_device *pdev)
  28 {
  29         sunxi_sram_release(&pdev->dev);
  30         return 0;
  31 }
  32
  33 static const struct of_device_id sun50i_de2_bus_of_match[] = {
  34         { .compatible = "allwinner,sun50i-a64-de2", },
  35         { /* sentinel */ }
  36 };
  37
  38 static struct platform_driver sun50i_de2_bus_driver = {
  39         .probe = sun50i_de2_bus_probe,
  40         .remove = sun50i_de2_bus_remove,
  41         .driver = {
  42                 .name = "sun50i-de2-bus",
  43                 .of_match_table = sun50i_de2_bus_of_match,
  44         },
  45 };
  46
  47 builtin_platform_driver(sun50i_de2_bus_driver);