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                 dev_err(&pdev->dev, "Error couldn't map SRAM to device\n");
  20                 return ret;
  21         }
  22
  23         of_platform_populate(np, NULL, NULL, &pdev->dev);
  24
  25         return 0;
  26 }
  27
  28 static int sun50i_de2_bus_remove(struct platform_device *pdev)
  29 {
  30         sunxi_sram_release(&pdev->dev);
  31         return 0;
  32 }
  33
  34 static const struct of_device_id sun50i_de2_bus_of_match[] = {
  35         { .compatible = "allwinner,sun50i-a64-de2", },
  36         { /* sentinel */ }
  37 };
  38
  39 static struct platform_driver sun50i_de2_bus_driver = {
  40         .probe = sun50i_de2_bus_probe,
  41         .remove = sun50i_de2_bus_remove,
  42         .driver = {
  43                 .name = "sun50i-de2-bus",
  44                 .of_match_table = sun50i_de2_bus_of_match,
  45         },
  46 };
  47
  48 builtin_platform_driver(sun50i_de2_bus_driver);